50TCSingle Package RooftopCooling Onlywith Puronr (R---410A) RefrigerantSizes: 04, 05, 06, 07

Installation InstructionsNOTE: Read the entire instruction manual before startingthe installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS 2. . . . . . . . . . . . . . . . . . . .

Rated Indoor Airflow 3. . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Jobsite Survey 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 1 -- Plan for Unit Location 6. . . . . . . . . . . . . . . . . .

Roof Mount 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 2 -- Plan for Sequence of Unit Installation 7. . . . . .

Curb--Mount Installation 7. . . . . . . . . . . . . . . . . . . . .

Pad--Mount Installation 7. . . . . . . . . . . . . . . . . . . . . .

Frame--Mount Installation 7. . . . . . . . . . . . . . . . . . . .

Step 3 -- Inspect Unit 7. . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 4 -- Provide Unit Support 7. . . . . . . . . . . . . . . . . . .

Roof Curb Mount 7. . . . . . . . . . . . . . . . . . . . . . . . . .

Slab Mount (Horizontal Units Only) 7. . . . . . . . . . .

Alternate Unit Support(In Lieu of Curb or Slab Mount) 7. . . . . . . . . . . . . .

Step 5 -- Field Fabricate Ductwork 9. . . . . . . . . . . . . . . .

For Units with Accessory Electric Heaters 9. . . . . .

Step 6 -- Rig and Place Unit 9. . . . . . . . . . . . . . . . . . . . .

Positioning on Curb 10. . . . . . . . . . . . . . . . . . . . . . .

Step 7 -- Convert to Horizontal and ConnectDuctwork 10. . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 8 -- Install Outside Air Hood 11. . . . . . . . . . . . . . .

Economizer and Two Position Damper HoodPackage Removal and Setup — Factory Option 11. .

Economizer Hood and Two--Position Hood 11. . . . .

Step 9 -- Install External Condensate Trapand Line 12. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 10 -- Make Electrical Connections 12. . . . . . . . . . .

Field Power Supply 12. . . . . . . . . . . . . . . . . . . . . . . .

Units with Factory--InstalledNon--Fused Disconnect 13. . . . . . . . . . . . . . . . . . . . .

Units without Factory--InstalledNon--Fused Disconnect 14. . . . . . . . . . . . . . . . . . . . .

All Units 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Convenience Outlets 14. . . . . . . . . . . . . . . . . . . . . . .

Factory--Option Thru--Base Connections 16. . . . . .

Units without Thru--Base Connections 16. . . . . . . . .

Field Control Wiring 16. . . . . . . . . . . . . . . . . . . . . . .

Thermostat 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unit without Thru--Base Connection Kit 17. . . . . . .

Heat Anticipator Settings 17. . . . . . . . . . . . . . . . . . .

Electric Heaters 17. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Single Point Boxes & Supplementary Fuses 18. . . .

Single Point Boxes without Fuses 18. . . . . . . . . . . .

Low--Voltage Control Connections 18. . . . . . . . . . . .

Humidi--MiZerR Control Connections 19. . . . . . . . . .

Humidi--MiZer -- Space RH Controller 19. . . . . . . .

EconoMi$er X (Factory--Installed Option) 19. . . . . . .

PremierLinkt (Factory Option) 21. . . . . . . . . . . . . . .

Supply Air Temperature (SAT) Sensor 24. . . . . . . . .

Outdoor Air Temperature (OAT) Sensor 24. . . . . . .

EconoMi$er2 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Field Connections 24. . . . . . . . . . . . . . . . . . . . . . . . . .

Space Sensors 26. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connect Thermostat 26. . . . . . . . . . . . . . . . . . . . . . .

Configure the Unit for Thermostat Mode 26. . . . . .

Economizer Controls 27. . . . . . . . . . . . . . . . . . . . . . . .

Indoor Air Quality (CO2 sensor) 27. . . . . . . . . . . . .

Outdoor Air Quality Sensor 27. . . . . . . . . . . . . . . . .

Space Relative Humidity Sensor orHumidistat Connections 28. . . . . . . . . . . . . . . . . . . .

Smoke Detector/Fire Shutdown (FSD) 28. . . . . . . . .

Filter Status Switch 29. . . . . . . . . . . . . . . . . . . . . . . .

Supply Fan Status Switch 29. . . . . . . . . . . . . . . . . . .

Remote Occupied Switch 29. . . . . . . . . . . . . . . . . . .

Power Exhaust (output) 29. . . . . . . . . . . . . . . . . . . . .

CCN Communication Bus 29. . . . . . . . . . . . . . . . . .

RTU Open Control System 31. . . . . . . . . . . . . . . . . . .

Supply Air Temperature (SAT) Sensor 34. . . . . . . . .

2

Outdoor Air Temperature (OAT) Sensor 34. . . . . . .

EconoMi$er2 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Field Connections 35. . . . . . . . . . . . . . . . . . . . . . . . . .

Space Temperature (SPT) Sensors 35. . . . . . . . . . . .

Indoor Air Quality (CO2) Sensor 35. . . . . . . . . . . . .

Outdoor Air Quality Sensor 36. . . . . . . . . . . . . . . . .

Space Humidity Sensor or Humidistat 36. . . . . . . . .

Smoke Detector/Fire Shutdown (FSD) 37. . . . . . . . .

Connecting Discrete Inputs 37. . . . . . . . . . . . . . . . . .

Communication Wiring -- Protocols 38. . . . . . . . . . . .

General 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Local Access 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RTU Open Troubleshooting 39. . . . . . . . . . . . . . . . .

Outdoor Air Enthalpy Control 40. . . . . . . . . . . . . . . . .

Differential Enthalpy Control 40. . . . . . . . . . . . . . . .

Return Air Enthalpy Sensor 41. . . . . . . . . . . . . . . . .

Smoke Detectors 41. . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 11 -- Adjust Factory--Installed Options 51. . . . . . . .

Step 12 -- Install Accessories 51. . . . . . . . . . . . . . . . . . .

UNIT START--UP CHECKLIST 55. . . . . . . . . . . . . . . . . .

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,maintenance, or use can cause explosion, fire, electricalshock or other conditions which may cause personal injuryor property damage. Consult a qualified installer, serviceagency, or your distributor or branch for information orassistance. The qualified installer or agency must usefactory--authorized kits or accessories when modifying thisproduct. Refer to the individual instructions packaged withthe kits or accessories when installing.

Follow all safety codes. Wear safety glasses and workgloves. Use quenching cloths for brazing operations andhave a fire extinguisher available. Read these instructionsthoroughly and follow all warnings or cautions attached tothe unit. Consult local building codes and appropriatenational electrical codes (in USA, ANSI/NFPA 70,National Electrical Code (NEC); in Canada, CSA C22.1)for special requirements.

It is important to recognize safety information. This is thesafety--alert symbol . When you see this symbol on theunit and in instructions or manuals, be alert to thepotential for personal injury.

Understand the signal words DANGER, WARNING,CAUTION, and NOTE. These words are used with thesafety--alert symbol. DANGER identifies the most serioushazards which will result in severe personal injury ordeath. WARNING signifies hazards which could result inpersonal injury or death. CAUTION is used to identifyunsafe practices, which may result in minor personalinjury or product and property damage. NOTE is used tohighlight suggestions which will result in enhancedinstallation, reliability, or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personalinjury or death.

Before performing service or maintenance operationson unit, turn off main power switch to unit and installlock(s) and lockout tag(s). Ensure electrical service torooftop unit agrees with voltage and amperage listedon the unit rating plate. Unit may have more than onepower switch.

! WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personalinjury, death and/or equipment damage.

Puronr (R--410A) refrigerant systems operate athigher pressures than standard R--22 systems. Do notuse R--22 service equipment or components on Puronrefrigerant equipment.

! WARNING

PERSONAL INJURY AND ENVIRONMENTALHAZARD

Failure to follow this warning could cause personalinjury or death.

Relieve pressure and recover all refrigerant beforesystem repair or final unit disposal.

Ware safety glasses and gloves when handlingrefrigerants. Keep torches and other ignition sourcesaway from refrigerants and oils.

! WARNING

CUT HAZARD

Failure to follow this caution may result in personalinjury.

Sheet metal parts may have sharp edges or burrs. Usecare and wear appropriate protective clothing, safetyglasses and gloves when handling parts and servicingair conditioning equipment.

CAUTION!

50TC

3

Rated Indoor Airflow (cfm)

The table to the right lists the rated indoor airflow usedfor the AHRI efficiency rating for the units covered in thisdocument.

Model Number Full Load Airflow (cfm)

50TC*A04 1275

50TC*A05 1400

50TC*A06 1800

50TC*A/B07 2200

Model Series - WeatherMakerTM

TC - Standard Efficiency

Unit Heat Type50 - Electric Heat Packaged Rooftop

Cooling Tons04 = 3 tons05 = 4 tons06 = 5 tons07 = 6 tons

Heat Options- = No Heat

Sensor OptionsA = NoneB = RA Smoke DetectorC = SA Smoke DetectorD = RA + SA Smoke DetectorE = CO2

F = RA Smoke Detector and CO2

G = SA Smoke Detector and CO2

H = RA + SA Smoke Detector and CO2

Indoor Fan Options0 = Direct Drive, Standard Static Option (04/05/06 models only)1 = Belt Drive, Standard Static Option2 = Belt Drive, Medium Static Option3 = Belt Drive, High Static Option

Refrig. Systems OptionsA = Standard One Stage Cooling ModelsB = Standard One Stage Cooling Models with Humidi-MiZer® (07 models only)

Coil Options – RTPF (Outdoor - Indoor - Hail Guard)A = Al/Cu - Al/CuB = Precoat Al/Cu - Al/CuC = E-coat Al/Cu - Al/CuD = E-coat Al/Cu - E-coat Al/CuE = Cu/Cu - Al/CuF = Cu/Cu - Cu/CuM = Al/Cu -Al/Cu — Louvered Hail GuardN = Precoat Al/Cu - Al/Cu — Louvered Hail GuardP = E-coat Al/Cu - Al/Cu — Louvered Hail GuardQ = E-coat Al/Cu - E-coat Al/Cu — Louvered Hail GuardR = Cu/Cu - Al/Cu — Louvered Hail GuardS = Cu/Cu - Cu/Cu — Louvered Hail Guard

Coil Options – Novation (Outdoor - Indoor - Hail Guard)G = Al/Al - Al/CuH = Al/Al - Cu/CuJ = Al/Al - E-coat Al/CuK = E-coat Al/Al - Al/CuL = E-coat Al/Al - E-coatAl/CuT = Al/Al - Al/Cu — Louvered Hail GuardU = Al/Al - Cu/Cu — Louvered Hail GuardV = Al/Al - E-coat Al/Cu — Louvered Hail GuardW = E-coat Al/Al - Al/Cu — Louvered Hail GuardX = E-coat Al/Al - E-coat Al/Cu — Louvered Hail Guard

Voltage1 = 575/3/603 = 208-230/1/605 = 208-230/3/606 = 460/3/60

Design Revision- = Factory Design Revision

Base Unit Controls0 = Electromechanical Controls can be used with W7212 EconoMi$er IV (Non-Fault Detection and Diagnostic)1 = PremierLink Controller2 = RTU Open Multi-Protocol Controller6 = Electro-mechanical w/ 2-Speed Fan and W7220 Economizer Controller Controls. Can be used with W7220 EconoMi$er X (w/ Fault Detection & Diagnostic)

Intake / Exhaust OptionsA = NoneB = Temperature Economizer w/ Barometric ReliefF = Enthalpy Economizer w/ Barometric Relief K = 2-Position DamperU = Temperature Ultra Low Leak Economizer w/ Barometric ReliefW = Enthalpy Ultra Low Leak Economizer w/ Barometric Relief

Service Options0 = None1 = Unpowered Convenience Outlet2 = Powered Convenience Outlet3 = Hinged Panels4 = Hinged Panels and Unpowered Convenience Outlet5 = Hinged Panels and Powered Convenience Outlet

Packaging & Seismic Compliance0 = Standard1 = LTL3 = California Seismic Compliant Label4 = LTL and CA Seismic Compliant Label

Electrical Options A = NoneC = Non-Fused DisconnectD = Thru-The-Base ConnectionsF = Non-Fused Disconnect and Thru-The-Base Connections

Example:Position:

5 0 T C - A 0 4 A 1 A 5 - 0 A 0 A 01 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

NOTE: On single phase (-3 voltage code) models, the followingare not available as a factory installed option:- Coated Coils or Cu Fin Coils- Louvered Hail Guards- Economizer or 2 Position Damper- Powered 115 Volt Convenience Outlet

C150140

Fig. 1 -- 50TC 04--07 Model Number Nomenclature (Example)

50TC

4

C150141

Fig. 2 -- Dimensional Drawing

50TC

5

C150142

Fig. 2 -- Unit Dimensional Drawing (cont.)

50TC

6

C

B

A

D

C08337

LOCATION DIMENSION CONDITION

A

48--- in (1219 mm)18--- in (457 mm)18--- in (457) mm12--- in (305 mm)

Unit disconnect is mounted on panelNo disconnect, convenience outlet optionRecommended service clearanceMinimum clearance

B42--- in (1067 mm)36--- in (914 mm)Special

Surface behind servicer is grounded (e.g., metal, masonry wall)Surface behind servicer is electrically non---conductive (e.g., wood, fiberglass)Check sources of flue products within 10--- ft of unit fresh air intake hood

C36--- in (914 mm)18--- in (457 mm)

Side condensate drain is usedMinimum clearance

D42--- in (1067 mm)36--- in (914 mm

Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)Surface behind servicer is electrically non---conductive (e.g., wood, fiberglass)

NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any applicationplanning overhead obstruction or for vertical clearances.

Fig. 3 -- Service Clearance Dimensional Drawing

.INSTALLATION

Jobsite Survey

Complete the following checks before installation.

1. Consult local building codes and the NEC (NationalElectrical Code) (ANSI/NFPA 70) for special installa-tion requirements.

2. Determine unit location (from project plans) or selectunit location.

3. Check for possible overhead obstructions which mayinterfere with unit lifting or rigging.

Step 1 — Plan for Unit Location

Select a location for the unit and its support system (curbor other) that provides for minimum clearances requiredfor safety (including clearance to combustible surfaces),unit performance and service access below, around andabove unit as specified in unit drawings. See Fig. 3.

NOTE: Consider also the effect of adjacent units.

Unit may be installed directly on wood flooring or onClass A, B, or C roof--covering material when roof curb isused.

Do not install unit in an indoor location. Do not locate airinlets near exhaust vents or other sources of contaminatedair.

Although unit is weatherproof, avoid locations that permitwater from higher level runoff and overhangs to fall ontounit.

Select a unit mounting system that provides adequateheight to allow installation of condensate trap perrequirements. Refer to Step 9 — Install ExternalCondensate Trap and Line – for required trap dimensions.

Roof Mount —

Check building codes for weight distributionrequirements. Unit operating weight is shown in Table 1.

50TC

7

Table 1 – Operating Weights

50TC---*UNITS LB (KG)

04 05 06 07

Base Unit 438 (199) 494 (224) 524 (238) 607 (275)

Economizer

Vertical 50 (23) 50 (23) 50 (23) 50 (23)

Horizontal 80 (36) 80 (36) 80 (36) 80 (36)

Humidi---MiZerR System N/A N/A N/A 41 (15)

Cu Fins 25 (11) 43 (20) 56 (25) 73 (33)

Powered Outlet 32 (15) 32 (15) 32 (15) 32 (15)

Curb

14--- in/356 mm 110 (50) 110 (50) 110 (50) 110 (50)

24--- in/610 mm 145 (66) 145 (66) 145 (66) 145 (66)

Step 2 — Plan for Sequence of Unit Installation

The support method used for this unit will dictate differentsequences for the steps of unit installation. For example,on curb--mounted units, some accessories must beinstalled on the unit before the unit is placed on the curb.Review the following for recommended sequences forinstallation steps.

Curb--mounted Installation —

Install curbInstall field--fabricated ductwork inside curbInstall accessory thru--base service connection package(affects curb and unit) (refer to accessory installationinstructions for details)Prepare bottom condensate drain connection to suitplanned condensate line routing (refer to Step 9 fordetails)Rig and place unitInstall outdoor air hoodInstall condensate line trap and pipingMake electrical connectionsInstall other accessories

Pad--mounted Installation —

Prepare pad and unit supportsCheck and tighten the bottom condensate drainconnection plugRig and place unitConvert unit to side duct connection arrangementInstall field--fabricated ductwork at unit duct openingsInstall outdoor air hoodInstall condensate line trap and pipingMake electrical connectionsInstall other accessories

Frame--mounted installation —

Frame--mounted applications generally follow thesequence for a curb installation. Adapt as required tosuit specific installation plan.

Step 3 — Inspect unit

Inspect unit for transportation damage. File any claimwith transportation agency.

Confirm before installation of unit that voltage, amperageand circuit protection requirements listed on unit dataplate agree with power supply provided.

Step 4 — Provide Unit Support

Roof Curb Mount —

Accessory roof curb details and dimensions are shown inFig. 4. Assemble and install accessory roof curb inaccordance with instructions shipped with the curb.

Curb should be level. This is necessary for unit drain tofunction properly. Unit leveling tolerances are shown inFig. 5. Refer to Accessory Roof Curb InstallationInstructions for additional information as required.

Install insulation, cant strips, roofing felt, and counterflashing as shown. Ductwork must be attached to curb andnot to the unit. The accessory thru--the--base power andgas connection package must be installed before the unitis set on the roof curb.

If electric and control wiring is to be routed through thebasepan, attach the accessory thru--the--base serviceconnections to the basepan in accordance with theaccessory installation instructions.

NOTE: The gasketing of the unit to the roof curb iscritical for a watertight seal. Install gasket supplied withthe roof curb as shown in Fig. 4. Improperly appliedgasket can also result in air leaks and poor unitperformance.

Slab Mount (Horizontal Units Only) —

Provide a level concrete slab that extends a minimum of 6in. (150 mm) beyond unit cabinet. Install a gravel apron infront of condenser coil air inlet to prevent grass andfoliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curbif required.

Alternate Unit Support (In Lieu of Curb or SlabMount) —

A non--combustible sleeper rail can be used in the unitcurb support area. If sleeper rails cannot be used, supportthe long sides of the unit with a minimum of 3 equallyspaced 4--in. x 4--in. (102 mm x 102 mm) pads on eachside.

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C13310Fig. 4 -- Roof Curb Details

50TC

9

A-B0.5” (13)

B-C1.0” (25)

A-C1.0” (25)

MAXIMUM ALLOWABLEDIFFERENCE IN. (MM)

C06110

Fig. 5 -- Unit Leveling Tolerances

Step 5 — Field Fabricate Ductwork

Cabinet return-air static pressure (a negative condition)shall not exceed 0.35 in. wg (87 Pa) with economizer or0.45 in. wg (112 Pa) without economizer.

For vertical ducted applications, secure all ducts to roofcurb and building structure. Do not connect ductwork tounit.

Fabricate supply ductwork so that the cross sectionaldimensions are equal to or greater than the unit supplyduct opening dimensions for the first 18 in. (458 mm) ofduct length from the unit basepan.

Insulate and weatherproof all external ductwork, joints,and roof openings with counter flashing and mastic inaccordance with applicable codes.

Ducts passing through unconditioned spaces must beinsulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the returnshould be ducted through the roof deck to comply withapplicable fire codes.

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in damageto roofing materials.

Membrane roofs can be cut by sharp sheet metaledges. Be careful when placing any sheet metal partson such roof.

CAUTION!

For Units with Accessory Electric Heaters —

All installations require a minimum clearance tocombustible surfaces of 1--in (25 mm) from duct for first12--in (305 mm) away from unit.

Outlet grilles must not lie directly below unit discharge.

NOTE: A 90--degree elbow must be provided in theductwork to comply with UL (Underwriters Laboratories)code for use with electric heat.

PERSONAL INJURY HAZARD

Failure to follow this warning could cause personalinjury.

For vertical supply and return units, tools or partscould drop into ductwork and cause an injury. Installa 90--degree turn in the return ductwork between theunit and the conditioned space. If a 90--degree elbowcannot be installed, then a grille of sufficient strengthand density should be installed to prevent objectsfrom falling into the conditioned space. Due toelectric heater, supply duct will require 90--degreeelbow.

! WARNING

Step 6 — Rig and Place Unit

Keep unit upright and do not drop. Spreader bars are notrequired if top crating is left on unit. Rollers may be usedto move unit across a roof. Level by using unit frame as areference. See Table 1 and Fig. 6 for additionalinformation.

Lifting holes are provided in base rails as shown in Fig. 6.Refer to rigging instructions on unit.

Rigging materials under unit (cardboard or wood to prevent base pan damage) must be removed PRIOR to placing the unit on the roof curb.

When using the standard side drain connection, ensure thered plug in the alternate bottom connection is tight. Do thisbefore setting the unit in place. The red drain pan plug canbe tightened with a 1/2--in. square socket drive extension. Forfurther details see “Step 9 -- Install External CondensateTrap and Line on page 12.

Before setting the unit onto the curb, recheck gasketing oncurb.

UNIT DAMAGE HAZARD

Failure to follow this caution may result inequipment damage.

All panels must be in place when rigging. Unit is notdesigned for handling by fork truck.

If using top crate as spreader bar, once unit is set,carefully lower wooden crate off building roof top toground. Ensure that no people or obstructions arebelow prior to lowering the crate.

CAUTION!

50TC

517

10

DETAIL "A"PLACE ALL SEAL STRIP IN PLACEBEFORE PLACING UNIT ON ROOF CURB.

DUCT END

SEE DETAIL "A""A"

(914-1371)36"- 54"

"C"

"B"

SPREADERBARS

REQUIRED

C11292

UNITMAX WEIGHT

DIMENSIONA B C

LB KG IN MM IN MM IN MM50TC---A04 740 336 74.5 1890 38 965 33.5 850

50TC---A05 795 361 74.5 1890 38 965 33.5 850

50TC---A06 865 393 74.5 1890 38 965 33.5 850

50TC---A07 1040 473 74.5 1890 38 965 41.5 1055

NOTES:1. SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not used.2. Dimensions in ( ) are in millimeters.3. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered aroundthe unit center of gravity. Use wooden top to prevent rigging straps from damaging unit.

Fig. 6 -- Rigging Details

Positioning on Curb —

Position unit on roof curb so that the following clearancesare maintained: 1/4 in. (6.4 mm) clearance between theroof curb and the base rail inside the front and rear, 0.0 in.clearance between the roof curb and the base rail inside onthe duct end of the unit. This will result in the distancebetween the roof curb and the base rail inside on thecondenser end of the unit being approximately 1/4 in.(6.4 mm).

Although unit is weatherproof, guard against water fromhigher level runoff and overhangs.

UNIT DAMAGE HAZARD

Failure to follow this caution may result inequipment damage.

All panels must be in place when rigging. Unit is notdesigned for handling by fork truck.

CAUTION!

After unit is in position, remove rigging skids andshipping materials.

Step 7 — Convert to Horizontal and ConnectDuctwork (when required)

Unit is shipped in the vertical duct configuration. Unitwithout factory--installed economizer or return air smokedetector option may be field--converted to horizontal ductedconfiguration. To convert to horizontal configuration,

remove screws from side duct opening covers and removecovers. Using the same screws, install covers on verticalduct openings with the insulation--side down. Seals aroundduct openings must be tight. See Fig. 7.

C06108

Fig. 7 -- Horizontal Conversion Panels

Field--supplied flanges should be attached to horizontalduct openings and all ductwork should be secured to theflanges. Insulate and weatherproof all external ductwork,joints, and roof or building openings with counter flashingand mastic in accordance with applicable codes.

Do not cover or obscure visibility to the unit’s informativedata plate when insulating horizontal ductwork.

50TC

11

Step 8 — Install Outside Air Hood

Economizer and Two Position Damper HoodPackage Removal and Setup -- Factory Option

NOTE: Economizer and Two Position Damper are notavailable as factory installed options for size 04--06 singlephase (--3 voltage code) models.

1. The hood is shipped in knock--down form and must befield assembled. The indoor coil access panel is used asthe hood top while the hood sides, divider and filter arepackaged together, attached to a metal support tray us-ing plastic stretch wrap, and shipped in the return aircompartment behind the indoor coil access panel. Thehood assembly’s metal tray is attached to the basepanand also attached to the damper using two plastic tie--wraps.

2. To gain access to the hood, remove the filter accesspanel. (See Fig. 8.)

FILTER ACCESS PANEL

OUTDOOR-AIR OPENING ANDINDOOR COIL ACCESS PANEL

COMPRESSORACCESS PANEL

C06023Fig. 8 -- Typical Access Panel Locations

3. Locate the (2) screws holding the metal tray to thebasepan and remove. Locate and cut the (2) plastictie--wraps securing the assembly to the damper. (SeeFig. 9) Be careful to not damage any wiring or cuttie--wraps securing any wiring.

Hood Parts

Plastic Tie WrapQty (2)

Screws for Metal TrayQty (2)

C08639

Fig. 9 -- Economizer and Two--Position DamperHood Parts Location

4. Carefully lift the hood assembly (with metal tray)through the filter access opening and assemble per the

steps outlined in Economizer Hood and Two–PositionHood, below.

Economizer Hood and Two--Position Hood —

NOTE: If the power exhaust accessory is to be installedon the unit, the hood shipped with the unit will not beused and must be discarded. Save the aluminum filter foruse in the power exhaust hood assembly.

1. The indoor coil access panel will be used as the top ofthe hood. Remove the screws along the sides and bot-tom of the indoor coil access panel. See Fig. 10.

TOPPANEL

INDOORCOILACCESSPANEL

INDOORCOILACCESSPANEL

CAULKHERE

TOPPANEL

C06025Fig. 10 -- Indoor Coil Access Panel Relocation

2. Swing out indoor coil access panel and insert the hoodsides under the panel (hood top). Use the screwsprovided to attach the hood sides to the hood top. Usescrews provided to attach the hood sides to the unit. SeeFig. 11.

B

TOPPANEL

INDOOR COILACCESS PANEL

19 1/16”SCREW

HOOD DIVIDER

LEFTHOODSIDE

33 3/8”(848mm)

(483mm)

C06026Fig. 11 -- Economizer Hood Construction

3. Remove the shipping tape holding the economizerbarometric relief damper in place (economizer only).

4. Insert the hood divider between the hood sides. SeeFig. 11 and Fig. 12. Secure hood divider with 2screws on each hood side. The hood divider is alsoused as the bottom filter rack for the aluminum filter.

50TC

12

5. Open the filter clips which are located underneath thehood top. Insert the aluminum filter into the bottomfilter rack (hood divider). Push the filter into positionpast the open filter clips. Close the filter clips to lockthe filter into place. See Fig. 12.

6. Caulk the ends of the joint between the unit top paneland the hood top.

7. Replace the filter access panel.

DIVIDER

BAROMETRICRELIEF

CLEANABLEALUMINUMFILTER

FILTER

HOOD

FILTERCLIP

OUTSIDEAIR

C08634Fig. 12 -- Economizer Filter Installation

Step 9 — Install External Condensate Trapand Line

The unit has one 3/4-in. condensate drain connection onthe end of the condensate pan and an alternate connectionon the bottom. See Fig. 13. Unit airflow configurationdoes not determine which drain connection to use. Eitherdrain connection can be used with vertical or horizontalapplications.

DRAIN(FACTORY-INSTALLED)

PLUG

CONDENSATE PAN (SIDE VIEW)

STANDARDSIDE DRAIN

ALTERNATEBOTTOM DRAIN

C08021

Fig. 13 -- Condensate Drain Pan (Side View)

To use the alternate bottom drain connection, remove thered drain plug from the bottom connection (use a 1/2--in.square socket drive extension) and install it in the sidedrain connection.The piping for the condensate drain and external trap canbe completed after the unit is in place. See Fig. 14.NOTE: If the alternate bottom drain is not used check thedrain plug for tightness prior to setting the unit on the roofcurb.

NOTE: Trap should be deep enough to offset maximum unit staticdifference. A 4” (102) trap is recommended.

MINIMUM PITCH1” (25mm) PER10’ (3m) OF LINE

BASE RAIL

OPENVENT

TO ROOFDRAIN

DRAIN PLUG

ROOFCURB

SEE NOTE

2˝ (51) MIN

C08022

Fig. 14 -- Condensate Drain Piping Details

All units must have an external trap for condensatedrainage. Install a trap at least 4-in. (102 mm) deep andprotect against freeze-up. If drain line is installeddownstream from the external trap, pitch the line awayfrom the unit at 1-in. per 10 ft (25 mm in 3 m) of run. Donot use a pipe size smaller than the unit connection(3/4-in.).

Step 10 — Make Electrical Connections

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personalinjury or death.

Unit cabinet must have an uninterrupted, unbrokenelectrical ground to minimize the possibility ofpersonal injury if an electrical fault should occur. Thisground may consist of electrical wire connected tounit ground lug in control compartment, or conduitapproved for electrical ground when installed inaccordance with NEC; ANSI/NFPA 70, latest edition(in Canada, Canadian Electrical Code CSA [CanadianStandards Association] C22.1), and local electricalcodes.

! WARNING

NOTE: Check all factory and field electrical connectionsfor tightness. Field--supplied wiring shall conform withthe limitations of minimum 63_F (33_C) rise.

Field Power Supply —

If equipped with optional Powered Convenience Outlet:The power source leads to the convenience outlet’stransformer primary are not factory connected. Installermust connect these leads according to required operationof the convenience outlet. If an always--energizedconvenience outlet operation is desired, connect thesource leads to the line side of the unit--mounteddisconnect. (Check with local codes to ensure this methodis acceptable in your area.) If a de--energize via unitdisconnect switch operation of the convenience outlet isdesired, connect the source leads to the load side of theunit disconnect. On a unit without a unit--mounteddisconnect, connect the source leads to compressor

50TC

13

contactor C and indoor fan contactor IFC pressure lugswith unit field power leads.

Refer to Fig. 22 for power transformer connections andthe discussion on connecting the convenience outlet onpage 14.

Field power wires are connected to the unit at line--sidepressure lugs on compressor contactor C and indoor fancontactor IFC (see wiring diagram label for control boxcomponent arrangement) or at factory--installed optionnon--fused disconnect switch. Max wire size is #2 AWG(copper only). (See Fig. 15.)NOTE: TEST LEADS -- Unit may be equipped withshort leads (pigtails) on the field line connection points oncontactor C or optional disconnect switch. These leads arefor factory run--test purposes only; remove and discardbefore connecting field power wires to unit connectionpoints. Make field power connections directly to lineconnection pressure lugs only.

Disconnectper

NEC

Disconnectper

NEC

208/230-1-60

11 13 11 13 13

L1 L2 L3

TB

C C IFC or(1-ph IFM)

208/230-3-60460-3-60375-3-60575-3-60

Units Without Disconnect Option

Units With Disconnect Option

2

4

6

1

3

5

L1

L2

L3

OptionalDisconnect

Switch

Disconnect factory test leads; discard.

FactoryWiring

C07494

Fig. 15 -- Power Wiring Connections

! WARNINGFIRE HAZARD

Failure to follow this warning could result inintermittent operation or performance satisfaction.

Do not connect aluminum wire between disconnectswitch and 50TC unit. Use only copper wire.(See Fig. 16.)

COPPER

WIRE ONLY

ELECTRICDISCONNECT

SWITCH

ALUMINUMWIRE

A93033

Fig. 16 -- Disconnect Switch and Unit

Units with Factory--Installed Non--Fused Disconnect —

The factory--installed option non--fused disconnect (NFD)switch is located in a weatherproof enclosure locatedunder the main control box. The manual switch handle andshaft are shipped in the disconnect enclosure. Assemble theshaft and handle to the switch at this point. Discard thefactory test leads (see Fig. 15).Connect field power supply conductors to LINE sideterminals when the switch enclosure cover is removed toattach the handle.

C12284

Fig. 17 -- Location of Non--Fused Disconnect Enclosure

To field install the NFD shaft and handle:

1. Remove the unit front pane (see Fig. 2).2. Remove (3) hex screws on the NFD enclosure -- (2) on

the face of the cover and (1) on the left side cover.3. Remove the front cover of the NFD enclosure.4. Make sure the NFD shipped from the factory is at

OFF position (the arrow on the black handle knob isat OFF).

5. Insert the shaft with the cross pin on the top of the shaftin the horizontal position.

6. Measure from the tip of the shaft to the top surface ofthe black pointer; the measurement should be 3.75 --3.88 in. (95 -- 99 mm).

7. Tighten the locking screw to secure the shaft to theNFD.

8. Turn the handle to the OFF position with red arrowpointing at OFF.

9. Install the handle on to the painted cover horizontallywith the red arrow pointing to the left.

10. Secure the handle to the painted cover with (2) screwsand lock washers supplied.

50TC

14

11. Engaging the shaft into the handle socket, re--install(3) hex screws on the NFD enclosure.

12. Re--install the unit front panel.

C12279

Fig. 18 -- Handle and Shaft Assembly for NFD

Units Without Factory--InstalledNon--Fused Disconnect —

When installing units, provide a disconnect switch perNEC (National Electrical Code) of adequate size.Disconnect sizing data is provided on the unit informativeplate. Locate on unit cabinet or within sight of the unit pernational or local codes. Do not cover unit informativeplate if mounting the disconnect on the unit cabinet.

All Units —

All field wiring must comply with NEC and all localcodes. Size wire based on MCA (Minimum Circuit Amps)on the unit informative plate. See Fig. 15 and the unitlabel diagram for power wiring connections to the unitpower terminal blocks and equipment ground. Maximumwire size is #2 ga AWG per pole.Provide a ground--fault and short--circuit over--currentprotection device (fuse or breaker) per NEC Article 440(or local codes). Refer to unit informative data plate forMOCP (Maximum Over--current Protection) device size.

All field wiring must comply with the NEC and localrequirements.

All units except 208/230-v units are factory wired for thevoltage shown on the nameplate. If the 208/230-v unit isto be connected to a 208-v power supply, the controltransformer must be rewired by moving the black wirewith the 1/4-in. female spade connector from the 230--vconnection and moving it to the 200-v 1/4-in. maleterminal on the primary side of the transformer. Refer tounit label diagram for additional information. Field powerwires will be connected line--side pressure lugs on thepower terminal block or at factory--installed optionnon--fused disconnect.

NOTE: Check all factory and field electrical connectionsfor tightness.

Convenience Outlets —

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personalinjury or death.

Units with convenience outlet circuits may usemultiple disconnects. Check convenience outlet forpower status before opening unit for service. Locateits disconnect switch, if appropriate, and open it.Lock--out and tag--out this switch, if necessary.

! WARNING

Two types of convenience outlets are offered on 50TCmodels: Non--powered and unit--powered. Both typesprovide a 125--volt GFCI (ground--faultcircuit--interrupter) duplex receptacle rated at 15--Abehind a hinged waterproof access cover, located on theend panel of the unit. See Fig. 19.

NOTE: Unit powered convenience outlets are notavailable as factory installed options for size 04--06 singlephase (--3 voltage code) models.

ConvenienceOutletGFCI

Pwd-COFuse Switch

Pwd-COTransformer

Control BoxAccess Panel

C08128

Fig. 19 -- Convenience Outlet Location

Installing Weatherproof Cover: A weatherproofwhile-in-use cover for the factory-installed convenienceoutlets is now required by UL standards. This cover cannotbe factory-mounted due its depth; it must be installed at unitinstallation. For shipment, the convenience outlet is coveredwith a blank cover plate.

On units with electro--mechanical controls the weatherproofcover kit is shipped in the unit’s control box. The kitincludes the hinged cover, a backing plate and gasket.On units with a factory installed direct digital controller(PremierLinkt or RTU Open) the weatherproof cover kitis secured to the basepan underneath the control box. SeeFig. 20.DISCONNECT ALL POWER TO UNIT ANDCONVENIENCE OUTLET. LOCK--OUT AND TAG--OUTALL POWER.

50TC

15

WeatherproofCover

C150149

Fig. 20 -- Weatherproof Cover -- Shipping Location onUnits with Factory Installed DDC

Remove the blank cover plate at the convenience outlet;discard the blank cover.Loosen the two screws at the GFCI duplex outlet, untilapproximately 1/2-in (13 mm) under screw heads areexposed. Press the gasket over the screw heads. Slip thebacking plate over the screw heads at the keyhole slotsand align with the gasket; tighten the two screws untilsnug (do not over-tighten).Mount the weatherproof cover to the backing plate asshown in Fig. 21. Remove two slot fillers in the bottom ofthe cover to permit service tool cords to exit the cover.Check for full closing and latching.

RECEPTACLENOT INCLUDED

COVER – WHILE-IN-USE WEATHERPROOF

BASE PLATE FOR GFCI RECEPTACLE

C09022

Fig. 21 -- Weatherproof Cover Installation

Non--powered type: This type requires the fieldinstallation of a general--purpose 125--volt 15--A circuitpowered from a source elsewhere in the building. Observenational and local codes when selecting wire size, fuse orbreaker requirements and disconnect switch size andlocation. Route 125--v power supply conductors into thebottom of the utility box containing the duplex receptacle.

Unit--powered type: A unit--mounted transformer isfactory--installed to stepdown the main power supplyvoltage to the unit to 115--v at the duplex receptacle. Thisoption also includes a manual switch with fuse, located ina utility box and mounted on a bracket behind theconvenience outlet; access is through the unit’s controlbox access panel. See Fig. 19.

The primary leads to the convenience outlet transformer arenot factory--connected. Selection of primary power source isa customer--option. If local codes permit, the transformerprimary leads can be connected at the line--side terminals onthe unit--mounted non--fused disconnect or HACR breakerswitch; this will provide service power to the unit when theunit disconnect switch or HACR switch is open. Otherconnection methods will result in the convenience outletcircuit being de--energized when the unit disconnect orHACR switch is open. See Fig. 22.

Using unit--mounted convenience outlets: Units with unit--mounted convenience outlet circuits will often require thattwo disconnects be opened to de--energize all power to theunit. Treat all units as electrically energized until the con-venience outlet power is also checked and de--energization isconfirmed. Observe National Electrical Code Article 210,Branch Circuits, for use of convenience outlets.

C08283

UNITVOLTAGE

CONNECTAS

PRIMARYCONNECTIONS

TRANSFORMERTERMINALS

208,230 240 L1: RED +YEL

L2: BLU + GRAH1 + H3H2 + H4

460 480L1: REDSplice BLU + YELL2: GRA

H1H2 + H3H4

575 600 L1: REDL2: GRA

H1H2

Fig. 22 -- Powered Convenience Outlet Wiring

Test the GFCI receptacle by pressing the TEST button onthe face of the receptacle to trip and open the receptacle.Check for proper grounding wires and power line phasingif the GFCI receptacle does not trip as required. Press theRESET button to clear the tripped condition.

Fuse on power type: The factory fuse is a Bussman“Fusetron” T--15, non--renewable screw--in (Edison base)type plug fuse.

B50HJ542739

Maximum Continuous use : 8 Amps 24/7

Convenience Outlet UtilizationNOTICE

C13415

Fig. 23 -- Convenience Outlet Utilization Notice Label

50TC

16

Factory--Option Thru--Base Connections —

This service connection kit consists of a 1/2--in electricalbulkhead connector and a 3/4--in electrical bulkheadconnector, all factory--installed in the embossed (raised)section of the unit basepan in the condenser section. The3/4--in bulkhead connector enables the low--voltage controlwires to pass through the basepan. The 1/2--in electricalbulkhead connector allows the high--voltage power wiresto pass through the basepan. See Fig. 24.

LOW VOLTAGECONDUITCONNECTOR

HIGH VOLTAGECONDUITCONNECTOR

C13412

Fig. 24 -- Thru--Base Connection Fittings

Check tightness of connector lock nuts before connectingelectrical conduits.

Field--supplied and field--installed liquid tight conduitconnectors and conduit may be attached to the connectorson the basepan. Pull correctly rated high voltage and lowvoltage through appropriate conduits. Connect the powerconduit to the internal disconnect (if unit is so equipped)or to the external disconnect (through unit side panel). Ahole must be field cut in the main control box bottom onthe left side so the 24--v control connections can be made.Connect the control power conduit to the unit control boxat this hole.

Units without Thru--Base Connections —

1. Install power wiring conduit through side panel open-ings. Install conduit between disconnect and controlbox.

2. Install power lines to terminal connections as shownin Fig. 15.

Voltage to compressor terminals during operation must bewithin voltage range indicated on unit nameplate. SeeTable 10. On 3--phase units, voltages between phases mustbe balanced within 2% and the current within 10%. Usethe formula shown in the legend for Table 10, Note 2 todetermine the percent of voltage imbalance. Operation onimproper line voltage or excessive phase imbalanceconstitutes abuse and may cause damage to electricalcomponents. Such operation would invalidate anyapplicable Carrier warranty.

Field Control Wiring —

The 50TC unit requires an external temperature controldevice. This device can be a thermostat (field--supplied)or a PremierLink controller (available as factory--installed

option or as field--installed accessory, for use on a CarrierComfort Network or as a stand alone control) or the RTUOpen Controller for Building Management Systems usingnon--CCN protocols (RTU Open is available as afactory--installed option only).

Thermostat —

Select a Carrier--approved accessory thermostat. Whenelectric heat is installed in the 50TC unit, the thermostatmust be capable of energizing the G terminal (to energizethe Indoor Fan Contactor) whenever there is a space callfor heat (energizing the W1 terminal). The accessorythermostats listed on the unit price pages can provide thissignal but they are not configured to enable this signal asshipped.

Install the accessory thermostat according to installationinstructions included with the accessory.

Locate the thermostat accessory on a solid wall in theconditioned space to sense average temperature inaccordance with the thermostat installation instructions.

If the thermostat contains a logic circuit requiring 24--vpower, use a thermostat cable or equivalent single leads ofdifferent colors with minimum of seven leads. If thethermostat does not require a 24--v source (no “C”connection required), use a thermostat cable or equivalentwith minimum of six leads. Check the thermostatinstallation instructions for additional features whichmight require additional conductors in the cable.For wire runs up to 50 ft. (15 m), use no. 18 AWG(American Wire Gage) insulated wire [35_C (95_F)minimum]. For 50 to 75 ft. (15 to 23 m), use no. 16 AWGinsulated wire [35_C (95_F) minimum]. For over 75 ft.(23 m), use no. 14 AWG insulated wire [35_C (95_F)minimum]. All wire sizes larger than no. 18 AWG cannotbe directly connected to the thermostat and will require ajunction box and splice at the thermostat.

X

C

G

W2

R

C

W2

G

W1

O/B/Y2 Y2

W1

R

Y1 Y1

TtypicalThermostatCorrections

THERMOSTAT

(Note 1) (Note 2)

(Note 3)

Note 1: Typical multi-function marking. Follow manufacturer’s configuration instructions to select Y2.Note 2: Y2 to Y2 connection required on single-stage cooling units when integrated economizer function is desiredNote 3: W2 connection not required on units with single-stage heating. Field Wiring

CentralTerminalBoard

C08575

Fig. 25 -- Low--Voltage Connections

50TC

17

Unit without Thru--Base Connection Kit —

Pass the thermostat control wires through the holeprovided in the corner post; then feed the wires throughthe raceway built into the corner post to the control box.Pull the wires over to the terminal strip on the upper--leftcorner of the Controls Connection Board. See Fig. 26.

RACEWAY

HOLE IN END PANEL (HIDDEN)

C08027

Fig. 26 -- Field Control Wiring Raceway

NOTE: If thru--the--bottom connections accessory isused, refer to the accessory installation instructions forinformation on routing power and control wiring.

Heat Anticipator Settings —

Set heat anticipator settings at 0.14 amp for the first stageand 0.14 amp for second--stage heating, when available.

Electric Heaters

50TC units may be equipped with field--installedaccessory electric heaters. The heaters are modular indesign, with heater frames holding open coil resistancewires strung through ceramic insulators, line--break limitswitches and a control contactor. One or two heatermodules may be used in a unit.Heater modules are installed in the compartment belowthe indoor (supply) fan outlet. Access is through theindoor access panel. Heater modules slide into thecompartment on tracks along the bottom of the heateropening. See Fig. 27, Fig. 28 and Fig. 29.Not all available heater modules may be used in everyunit. Use only those heater modules that are UL listed foruse in a specific size unit. Refer to the label on the unitcabinet for the list of approved heaters.Unit heaters are marked with Heater Model Numbers. Butheaters are ordered as and shipped in cartons marked witha corresponding heater Sales Package part number. SeeTable 2 for correlation between heater Model Number andSales Package part number.NOTE: The value in position 9 of the part number differsbetween the sales package part number (value is 1) and abare heater model number (value is 0).

DISCONNECT MOUNTINGLOCATION

UNIT BLOCK-OFFPANEL

OUTDOORACCESS PANEL

INDOORACCESSPANEL

C08133

Fig. 27 -- Typical Access Panel Location (3--5 Ton)

DISCONNECTMOUNTINGLOCATION

EMT OR RIGID CONDUIT(FIELD-SUPPLIED)

SINGLEPOINT BOX

CENTERPOST

HEATERCOVERS

HEATERMOUNTINGBRACKET

HEATERMODULE(LOCATION 2)

HEATERMODULE(LOCATION 1)

SINGLE POINTBOXMOUNTINGSCREW

BRACKET ANDCONDUITDRIP BOOT

MAINCONTROLBOX

CONTROL WIRE TERMINAL BLOCK

MANUAL RESETLIMIT SWITCH

C08134

Fig. 28 -- Typical Component Location

TRACK

FLANGE

C08135

Fig. 29 -- Typical Module Installation

50TC

18

Table 2 – Heater Model Number

Bare Heater Model Number C R H E A T E R 0 0 1 A 0 0

Heater Sales Package PNOIncludes:Bare HeaterCarton and packing materialsInstallation sheet

C R H E A T E R 1 0 1 A 0 0

Single Point Boxes and Supplementary Fuses —

When the unit MOCP device value exceeds 60--A,unit--mounted supplementary fuses are required for eachheater circuit. These fuses are included in accessorySingle Point Boxes, with power distribution and fuseblocks. The single point box will be installed directlyunder the unit control box, just to the left of the partitionseparating the indoor section (with electric heaters) fromthe outdoor section. The Single Point Box has a hingedaccess cover. See Fig. 30. The Single Point Box alsoincludes a set of power taps and pigtails to complete thewiring between the Single Point Box and the unit’s maincontrol box terminals. Refer to the accessory heater andSingle Point Box installation instructions for details on tapconnections.All fuses on 50TC units are 60--A. (Note that all heatersare qualified for use with a 60--A fuse, regardless of actualheater ampacity, so only 60--A fuses are necessary.)

Single Point Boxes without Fuses —

Unit heater applications not requiring supplemental fusesrequire a special Single Point Box without any fuses. Theaccessory Single Point Boxes contain a set of power tapsand pigtails to complete the wiring between the SinglePoint Box and the unit’s main control box terminals. Referto accessory heater and Single Point Box installationinstructions for details on tap connections.

ALLIED PA

MODEL NO.

ERIAL NO.

CORP.

OD

22.2

3123

ISTED AIRNDITIONINGUIP ACCESS 346N.

P / N 2- 5610-4 REV

1113

2123

CONTROLBOX

BUSHING

SINGLEPOINT BOXMOUNTINGSCREWS

FOAMBUSHING

DRIP BOOTBRACKETMOUNTINGSCREWS

HEATERRELAYS

POWERWIRES

HEATERMOUNTINGSCREWS

C14253

Fig. 30 -- Typical Single Point Installation

Low--Voltage Control Connections —

Pull the low--voltage control leads from the heatermodule(s) -- VIO and BRN (two of each if two modulesare installed; identify for Module #1) -- to the 4--poleterminal board TB4 located on the heater bulkhead to theleft of Heater #1. Connect the VIO lead from Heater #1 toterminal TB4--1. For 2 stage heating, connect the VIOlead from Heater #2 to terminal TB4--2. For 1 stageheating with 2 heater modules connect the VIO lead fromboth Heater #1 and #2 to terminal TB4--1. Connect bothBRN leads to terminal TB4--3. See Fig. 31.

ORN

BRN

FieldConnections

HR1: On Heater 1 in Position #1HR2: On Heater 2 in Position #2 (if installed)

2

3

12

1 3

VIO

ORN VIO BRN

VIO BRN BRNVIO

2TB4

VIO HR2

HR1

BRN

VIO BRN

Elec Htr

CTB

CONTLBOARD

C08331

Fig. 31 -- Accessory Electric Heater ControlConnections

50TC

19

Humidi--MiZerR Control Connections

Humidi--MiZer – Space RH Controller —

NOTE: The Humidi--MiZer is a factory installed optionwhich is available for 07 models only.

NOTE: The Humidi--MiZer is a factory installed option.Humidi--MiZer is not available for size 04--06 singlephase (--3 voltage code) models.

The Humidi--MiZer dehumidification system requires afield--supplied and --installed space relative humiditycontrol device. This device may be a separate humidistatcontrol (contact closes on rise in space RH above controlsetpoint) or a combination thermostat--humidistat controldevice such as Carrier’s EDGER Pro Thermidistat withisolated contact set for dehumidification control. Thehumidistat is normally used in applications where atemperature control is already provided (units withPermierLinkt control).To connect the Carrier humidistat (HL38MG029):

1. Route the humidistat 2--conductor cable (field--sup-plied) through the hole provided in the unit cornerpost.

2. Feed wires through the raceway built into the cornerpost (see Fig. 26) to the 24--v barrier located on theleft side of the control box. The raceway provides theUL--required clearance between high--voltage andlow--voltage wiring.

3. Use wire nuts to connect humidistat cable to twoPINK leads in the low–voltage wiring as shown inFig. 34.

To connect the Thermidistat device (33CS2PPRH--01):1. Route the Thermidistat multi--conductor thermostat

cable (field--supplied) through the hole provided inthe unit corner post.

2. Feed wires through the raceway built into the cornerpost (see Fig. 26) to the 24--v barrier located on theleft side of the control box. The raceway provides theUL--required clearance between high--voltage andlow--voltage wiring.

3. The Thermidistat has dry contacts at terminals D1and D2 for dehumidification operation (see Fig. 35).The dry contacts must be wired between CTBterminal R and the PINK lead to the LTLO switchwith field--supplied wire nuts. Refer to the installationinstructions included with the Carrier EdgeThermidistat device (Form 33CS--65SI or latest) formore information.

% RELATIVE HUMIDITY

C09295

Fig. 32 -- Accessory Field--Installed Humidistat

®

C09296

Fig. 33 -- EDGE Pro Thermidistat

EconoMi$er X (Factory--Installed Option) —

For details on operating 50TC units equipped with thefactory--installed EconoMi$er X option, refer toFactory--Installed Economizers for TC/TCQ/HC/HCQ/LC/KC/KCQ Rooftop Units, 3 to 27.5 Nominal Tons.Economizer Supplement Related to California Title 24(Catalog No. SUP--TI24--02SI, or later).

50TC

20

C150155Fig. 34 -- 50TC--B07 (unit with Humidi--MiZerR Adaptive Dehumidification System) Humidistat Wiring

RcRhW1

GY2C

O/W2/BY1

OATRRS

SRTNHUM

D1D2V+Vg

X*

C

G

W2

W1

Y2

Y1

R

EDGE Pro THERMIDISTATUnit CTB

THERMOSTAT

*Connection not required.

Humidi-MiZer™ FIOP

C09298

Fig. 35 -- 50TC--B07 (unit with Humidi--MiZer Adaptive Dehumidification System)with EDGE Pro Thermidistat Device

50TC

21

PremierLinkt (Factory--Option)

C08199

Fig. 36 -- PremierLink Controller

The PremierLink controller (see Fig. 36) is compatiblewith Carrier Comfort Networkr (CCN) devices. Thiscontrol is designed to allow users the access and ability tochange factory--defined settings, thus expanding thefunction of the standard unit control board. CCN serviceaccess tools include System Pilot (TM), Touch Pilot (TM)and Service Tool. (Standard tier display tools Navigatortand Scrolling Marquee are not suitable for use with latestPremierLink controller (Version 2.x).)

The PremierLink control is factory--mounted in the 50TCunit’s main control box to the left of the Central TerminalBoard (CTB). Factory wiring is completed throughharnesses connected to the CTB thermostat. Fieldconnections are made at a 16--pole terminal block (TB1)located on the bottom shelf of the unit control box in front

of the PremierLink controller. The factory--installedPremierLink control includes the supply--air temperature(SAT) sensor. The outdoor air temperature (OAT) sensor isincluded in the FIOP/accessory EconoMi$ert2 package.

The PremierLink controller requires the use of a Carrierelectronic thermostat or a CCN connection for timebroadcast to initiate its internal timeclock. This isnecessary for broadcast of time of day functions(occupied/unoccupied).

NOTE: PremierLink controller is shipped in Sensormode. To be used with a thermostat, the PremierLinkcontroller must be configured to Thermostat mode. Referto PremierLink Configuration instructions for OperatingMode.

C150009

Fig. 37 -- 50TC Control Box – PremierLink Location

50TC

22

C150156Fig. 38 -- PremierLink Wiring Schematic

50TC

23

C150157Fig. 39 -- PremierLink Wiring Schematic with Humidi--MiZerR

50TC

24

Supply Air Temperature (SAT) Sensor —

On FIOP--equipped 50TC unit, the unit is supplied with asupply--air temperature (SAT) sensor (33ZCSENSAT).This sensor is a tubular probe type, approx 6--inches (152mm) in length. It is a nominal 10--k ohm thermistor.

The SAT is factory--wired. The SAT probe is wire--tied tothe supply--air opening (on the horizontal opening end) inits shipping position. Remove the sensor for installation.Re--position the sensor in the flange of the supply--airopening or in the supply air duct (as required by localcodes). Drill or punch a 1/2--in. hole in the flange or duct.Use two field--supplied, self--drilling screws to secure thesensor probe in a horizontal orientation. See Fig. 40.

SUPPLY AIR RETURN AIR

SUPPLY AIRTEMPERATURESENSOR

ROOFCURB

C08200

Fig. 40 -- Typical Mounting Location for Supply AirTemperature (SAT) Sensor on Small Rooftop Units

NOTE: Refer to Form 33SC--68SI for completePremierLink configuration, operating sequences andtroubleshooting information. Have a copy of this manualavailable at unit start--up.

NOTE: The sensor must be mounted in the dischargeairstream downstream of the cooling coil and any heatingdevices. Be sure the probe tip does not come in contactwith any of the unit’s heater surfaces.

Outdoor Air Temperature (OAT) Sensor —

The OAT is factory--mounted in the EconoMi$er2 (FIOPor accessory). It is a nominal 10k ohm thermistor attachedto an eyelet mounting ring.

EconoMi$er2 —

The PremierLink control is used with EconoMi$er2(option or accessory) for outdoor air management. Thedamper position is controlled directly by the PremierLinkcontrol; EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced withfield--installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors)Space CO2 sensorOutdoor air CO2 sensor

Refer to Table 3 for accessory part numbers.

Field Connections

Field connections for accessory sensor and input devicesare made at the 16--pole terminal block (TB1) located onthe control box bottom shelf in front of the PremierLinkcontrol (See Fig. 38 or Fig. 39). Some input devices alsorequire a 24--vac signal source; connect at CTB terminalR at “THERMOSTAT” connection strip for this signalsource. See connections figures on following pages forfield connection locations (and for continued connectionsat the PremierLink board inputs).

Table 4 provides a summary of field connections for unitsequipped with Space Sensor. Table 5 provides a summary offield connections for units equipped with Space Thermostat.

Table 3 – PremierLink Sensor Usage

APPLICATIONOUTDOOR AIRTEMPERATURESENSOR

RETURN AIRTEMPERATURESENSOR

OUTDOOR AIRENTHALPY SENSOR

RETURN AIRENTHALPY SENSOR

Differential Dry BulbTemperature withPremierLink

(PremierLink requires4---20 mA Actuator)

Included ---CRTEMPSN001A00

Required ---33ZCT55SPTor equivalent

--- ---

Single Enthalpy withPremierLink

(PremierLink requires4---20mA Actuator)

Included ---Not Used --- Requires ---

33CSENTHSW ---

Differential Enthalpywith PremierLink

(PremierLink requires4---20mA Actuator)

Included ---Not Used ---

Requires ---33CSENTHSWor equivalent

Requires ---33CSENTSENor equivalent

NOTES:CO2 Sensors (Optional):33ZCSENCO2 --- Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.33ZCASPCO2 --- Aspirator box used for duct---mounted CO2 room sensor.33ZCT55CO2 --- Space temperature and CO2 room sensor with override.33ZCT56CO2 --- Space temperature and CO2 room sensor with override and setpoint.

50TC

25

Table 4 – Space Sensor Mode

TB1 TERMINAL FIELD CONNECTION INPUT SIGNAL1 T55---SEN/T56---SEN Analog (10k thermistor)2 RMTOCC Discrete, 24VAC3 T55---SEN/T56---SEN Analog (10k thermistor)4 CMPSAFE Discrete, 24VAC5 T56---SET Analog (10k thermistor)6 FSD Discrete, 24VAC7 LOOP---PWR Analog, 24VDC8 SPS Discrete, 24VAC9 IAQ---SEN Analog, 4---20mA10 FILTER Discrete, 24VAC11 IAQ---COM/OAQ---COM/RH---COM Analog, 4---20mA12 CCN + (RED) Digital, , 5VDC13 OAQ---SEN/RH---SEN Analog, 4---20mA14 CCN Gnd (WHT) Digital, 5VDC15 AUX OUT(Power Exhaust) (Output)Discrete 24VAC16 CCN --- (BLK) Digital, 5VDC

LEGEND:T55 --- Space Temperature Sensor FSD --- Fire ShutdownT56 --- Space Temperature Sensor IAQ --- Indoor Air Quality (CO2)CCN --- Carrier Comfort Network (communication bus) OAQ --- Outdoor Air Quality (CO2)CMPSAFE --- Compressor Safety RH --- Relative HumidityFILTER --- Dirty Filter Switch SFS --- Supply Fan Status

Table 5 – Thermostat Mode

TB1 TERMINAL FIELD CONNECTION INPUT SIGNAL1 RAT SEN Analog (10k thermistor)2 G Discrete, 24VAC3 RAT SEN Analog (10k thermistor)4 Y1 Discrete, 24VAC56 Y2 Discrete, 24VAC7 LOOP---PWR Analog, 24VDC8 W1 Discrete, 24VAC9 IAQ---SEN Analog, 4---20mA10 W2 Discrete, 24VAC11 IAQ---COM/OAQ---COM/RH---COM Analog, 4---20mA12 CCN + (RED) Digital, 5VDC13 OAQ---SEN/RH---SEN Analog, 4---20mA14 CCN Gnd (WHT) Digital, 5VDC15 AUX OUT (Power Exhaust) (Output) Discrete 24VAC16 CCN --- (BLK) Digital, 5VDC

LEGEND:CCN --- Carrier Comfort Network (communication bus) RH --- Relative HumidityG --- Thermostat Fan W1 --- Thermostat Heat Stage 1IAQ --- Indoor Air Quality (CO2) W2 --- Thermostat Heat Stage 2OAQ --- Outdoor Air Quality (CO2) Y1 --- Thermostat Cool Stage 1RAT --- Return Air Temperature Y2 --- Thermostat Cool Stage 2

50TC

26

Space Sensors —

The PremierLink controller is factory--shipped configuredfor Space Sensor Mode. A Carrier T--55 or T--56 spacesensor must be used. T--55 space temperature sensorprovides a signal of space temperature to the PremierLinkcontrol. T--56 provides same space temperature signal plusit allows for adjustment of space temperature setpointsfrom the face of the sensor by the occupants.

2 3 4 5 61

SW1

SEN

BRN (GND)BLU (SPT)

RED(+)WHT(GND)

BLK(-) CCN COM

SENSOR WIRING

C08201Fig. 41 -- T--55 Space Temperature Sensor Wiring

Connect T--55: See Fig. 41 for typical T--55 internalconnections. Connect the T--55 SEN terminals to TB1terminals 1 and 3 (see Fig. 42).

SEN J6-7

J6-6

1

3

TB1 PL

SEN

C08212

Fig. 42 -- PremierLink T--55 Sensor

Connect T--56: See Fig. 43 for T--56 internal connections.Install a jumper between SEN and SET terminals asillustrated. Connect T--56 terminals to TB1 terminals 1, 3and 5 (see Fig. 44).

2 3 4 5 61

SW1

SEN SET

Cool Warm

BRN (GND)BLU (SPT)

RED(+)WHT(GND)

BLK(-) CCN COM

SENSOR WIRING

JUMPERTERMINALSAS SHOWN

BLK(T56)

‘C08202

Fig. 43 -- T--56 Internal Connections

SEN J6-7

J6-6

1

3

TB1 PL

SEN

SET

Jumper

TB1 PL

J6-55SET

C08213Fig. 44 -- PremierLink T--56 Sensor

Connect Thermostat —

A 7--wire thermostat connection requires a 24--v powersource and a common connection. Use the R and Cterminals on the CTB’s THERMOSTAT connection stripfor these. Connect the thermostat’s Y1, Y2, W1, W2 andG terminals to PremierLink TB1 as shown in Fig. 45.

If the 50TC unit is equipped with factory--installed smokedetector(s), disconnect the factory BLU lead at TB1--6(Y2) before connecting the thermostat. Identify the BLUlead originating at CTB--DDC--1; disconnect at TB1--6and tape off. Confirm that the second BLU lead at TB1--6remains connected to PremierLink J4--8.

G J4-12

J4-10

J4-8

Y1

Y2

2

R R

4

6

J4-6

J4-4W2

C

8

10

C

SPACETHERMOSTAT

PL

CTBTHERMOSTAT

W1

TB1

CTBTHERMOSTAT

C08119Fig. 45 -- Space Thermostat Connections

If the 50TC unit has an economizer system andfree--cooling operation is required, a sensor representingReturn Air Temperature must also be connected(field--supplied and installed). This sensor may be a T--55Space Sensor (see Fig. 41) installed in the space or in thereturn duct, or it may be sensor PNO 33ZCSENSAT,installed in the return duct. Connect this sensor to TB1--1and TB1--3 per Fig. 42.

Configure the Unit for Thermostat Mode —

Connect to the CCN bus using a CCN service tool andnavigate to PremierLink Configuration screen for OperatingMode. Default setting is Sensor Mode (value 1). Change thevalue to 0 to reconfigure the controller for Thermostat Mode.

When the PremierLink is configured for ThermostatMode, these functions are not available: Fire Shutdown(FSD), Remote Occupied (RMTOCC), Compressor Safety(CMPSAFE), Supply Fan Status (SFS), and Filter PressureSwitch (FILTER).

50TC

27

Economizer Controls

Indoor Air Quality (CO2) Sensor —

The indoor air quality sensor accessory monitors spacecarbon dioxide (CO2) levels. This information is used tomonitor IAQ levels. Several types of sensors are available,for wall mounting in the space or in return duct, with andwithout LCD display, and in combination with spacetemperature sensors. Sensors use infrared technology tomeasure the levels of CO2 present in the space air.

The CO2 sensors are all factory set for a range of 0 to2000 ppm and a linear mA output of 4 to 20. Refer to theinstructions supplied with the CO2 sensor for electricalrequirements and terminal locations. See Fig. 46 fortypical CO2 sensor wiring schematic.

8 7 6 5 4 3 2 12 1

H G 24 VACOR

24 VDC

NC ALARMRELAYCONTACTS

COMNO }

0-10VDCSIG COM4-20mA

+

+-

+ -

J3 J4

C08635

Fig. 46 -- Indoor/Outdoor Air Quality (CO2) Sensor(33ZCSENCO2) -- Typical Wiring Diagram

To accurately monitor the quality of the air in theconditioned air space, locate the sensor near a return--airgrille (if present) so it senses the concentration of CO2leaving the space. The sensor should be mounted in alocation to avoid direct breath contact.

Do not mount the IAQ sensor in drafty areas such as nearsupply ducts, open windows, fans, or over heat sources.Allow at least 3 ft (0.9 m) between the sensor and anycorner. Avoid mounting the sensor where it is influencedby the supply air; the sensor gives inaccurate readings ifthe supply air is blown directly onto the sensor or if thesupply air does not have a chance to mix with the room airbefore it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor: For each sensor,use two 2--conductor 18 AWG (American Wire Gage)twisted--pair cables (unshielded) to connect the separateisolated 24 vac power source to the sensor and to connectthe sensor to the control board terminals.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIG COM) terminals on thesensor. See Fig. 46. Connect the 4--20 mA terminal toterminal TB1--9 and connect the SIG COM terminal toterminal TB1--11. See Fig. 47.

SEN J5-5

J5-3COM

9

11TB1

TB1IAQ Sensor

PL

24 VAC

C08636

Fig. 47 -- Indoor CO2 Sensor (33ZCSENCO2)Connections

Refer to Form 33SC--68SI, PremierLink Installation,Start--up, and Configuration Instructions, for detailedconfiguration information

Outdoor Air Quality Sensor(PNO 33ZCSENCO2 plus weatherproof enclosure) —

The outdoor air CO2 sensor is designed to monitor carbondioxide (CO2) levels in the outside ventilation air andinterface with the ventilation damper in an HVAC system.The OAQ sensor is packaged with an outdoor cover. SeeFig. 48. The outdoor air CO2 sensor must be located in theeconomizer outside air hood.

COVER REMOVED SIDE VIEW

C07135

Fig. 48 -- Outdoor Air Quality Sensor Cover

Wiring the Outdoor Air CO2 Sensor: A dedicatedpower supply is required for this sensor. A two--wire cableis required to wire the dedicated power supply for thesensor. The two wires should be connected to the powersupply and terminals 1 and 2.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIG COM) terminals on theOAQ sensor. See Fig. 46. Connect the 4 to 20 mAterminal to the TB1--13 terminal of the 50TC. Connect theSIG COM terminal to the TB1--11 terminal of the 50TC.See Fig. 49.

SEN J5-2

J5-3COM

13

11TB1

TB1 PLOAQ Sensor/RH Sensor

24 VAC

C08275

Fig. 49 -- Outdoor CO2 Sensor Connections

50TC

28

Space Relative Humidity Sensor or HumidistatConnections —

NOTE: The accessory space relative humidity sensor andhumidistat are not available for size 04--06 single phase(--3 voltage code) models.

Space Relative Humidity Sensor connections: Theaccessory space relative humidity sensor (33ZCSENSRH-01)is installed on an interior wall to measure the relativehumidity of the air within the occupied space.The use of a standard 2 X 4 inch electrical box toaccommodate the wiring is recommended for installation.The sensor can be mounted directly on the wall, ifacceptable by local codes.

UNIT DAMAGE HAZARD

Failure to follow this caution may result inpermanent damage to the sensor.

DO NOT clean or touch the sensing element withchemical solvents as they can permanently damagethe sensor.

CAUTION!

UNIT PERFORMANCE HAZARD

Failure to follow this caution will result in inaccuratesensor readings.

DO NOT mount the sensor in drafty areas such as nearheating or air--conditioning ducts, open windows, fans,or over heat sources such as baseboard heaters,radiators, or wall--mounted dimmers. Sensors mountedin those areas will produce inaccurate readings.

CAUTION!

If the sensor is installed directly on a wall service, install thehumidity sensor using 2 screws and 2 hollow wall anchors(field supplied). Do not over tighten screws. See Fig. 50.

SW2123456

ON

Io Vin Gnd Vo

MOUNTINGHOLES

WIRINGOPENING

C11084Fig. 50 -- Space Relative Humidity Sensor Installation

The sensor must be mounted vertically on the wall. TheCarrier logo should be orientated correctly when thesensor is properly mounted.Avoid corner locations. Allow at least 4 ft between thesensor and any corner. Airflow near corners tends to bereduced, resulting in erratic sensor readings. The sensorshould be vertically mounted approximately 5 ft up fromthe floor, beside the space temperature sensor.For wiring distances up to 500 feet, use a 3--conductor, 18or 20 AWG cable. ACCN communication cable can beused, although the shield is not required. The shield mustbe removed from the sensor end of the cable if this cableis used. See Fig. 51 for wiring details.

Io VoVin Gnd

BLAC

K

RED

TB1-7

TB1-13

C11180

Fig. 51 -- Space Relative Humidity Sensor Connection

The power for the sensor is provided by the PremierLinkcontrol on terminal J5--4 (+33 to +35vdc).To wire the sensor:

1. At the sensor, remove 4 inches fo the jacket from thecable. Strip ¼ inch of insulation from each conductor.Route the cable through the wire clearance opening inthe center of the sensor. See Fig. 50.

2. Connect a field--supplied BLACK wire to the sensorscrew terminal marked Vin.

3. Connect a field--supplied RED wire into the sensorscrew terminal marked Io.

4. Connect the field--supplied RED wire from the sensorto TB1--13.

5. Connect the field--supplied BLACK wire from thesensor to TB1--7.

Smoke Detector/Fire Shutdown (FSD) —

This function is available only when PremierLink isconfigured for (Space) Sensor Mode. The unit isfactory--wired for PremierLink FSD operation whenPremierLink is factory--installed.

On 50TC units equipped with factory--installed SmokeDetector(s), the smoke detector controller implements theunit shutdown through its NC contact set connected to theunit’s CTB input. The FSD function is initiated via thesmoke detector’s Alarm NO contact set. The PremierLinkcommunicates the smoke detector’s tripped status to theCCN building control. See Fig. 38 or Fig. 39(PremierLink wiring schematic).

50TC

29

Filter Status Switch —

This function is available only when PremierLink isconfigured for (Space) Sensor Mode.

PremierLink control can monitor return filter status in twoways: By monitoring a field--supplied/installed filterpressure switch or via supply fan runtime hours.

Using switch input: Install the dirty filter pressure switchaccording to switch manufacturer’s instructions, tomeasure pressure drop across the unit’s return filters.Connect one side of the switch’s NO contact set to CTB’sTHERMOSTAT--R terminal. Connect the other side of theNO contact set to TB1--10. Setpoint for Dirty Filter is setat the switch. See Fig. 52

R

TB1J4-4PL

Filter Switch (NO, close on rising pressure (high drop))

CTBThermostat

10

C08216

Fig. 52 -- PremierLink Filter Switch Connection

When the filter switch’s NO contact set closes as filterpressure drop increases (indicating dirt--laden filters), theinput signal to PremierLink causes the filter status point toread “DIRTY”.

Using Filter Timer Hours: Refer to Form 33SC--68SI forinstructions on using the PremierLink Configurationscreens and on unit alarm sequence.

Supply Fan Status Switch —

The PremierLink control can monitor supply fan operationthrough a field--supplied/installed differential pressureswitch. This sequence will prevent (or interrupt) operationof unit cooling, heating and economizer functions untilthe pressure switch contacts are closed indicating propersupply fan operation.

Install the differential pressure switch in the supply fansection according to switch manufacturer’s instructions.Arrange the switch contact to be open on no flow and toclose as pressure rises indicating fan operation.

Connect one side of the switch’s NO contact set to CTB’sTHERMOSTAT--R terminal. Connect the other side of theNO contact set to TB1--8. Setpoint for Supply Fan Statusis set at the switch. See Fig. 53.

R

8TB1

J4-6

PL

Fan (Pressure) Switch (NO, close on rise in pressure)CTB

Thermostat

C08118

Fig. 53 -- PremierLink Wiring Fan Pressure SwitchConnection

Remote Occupied Switch —

The PremierLink control permits a remote timeclock tooverride the control’s on--board occupancy schedule andplace the unit into Occupied mode. This function may alsoprovide a “Door Switch” time delay function that willterminate cooling and heating functions after a 2--20minute delay.

Connect one side of the NO contact set on the timeclockto CTB’s THERMOSTAT--R terminal. Connect the otherside of the timeclock contact to the unit’s TB1--2 terminal(see Fig. 54).

R

2TB1 PLTime Clock

Remote Occupied CTBThermostat

J4-12

C08214

Fig. 54 -- PremierLink Wiring Remote Occupied

Refer to Form 33SC--68SI for additional information onconfiguring the PremierLink control for Door Switchtimer function.

Power Exhaust (output) —

Connect the accessory Power Exhaust contactor coils(s)per Fig. 55.

J8-315

C

TB1 PLPEC TAN

GRA

Power Exhaust

CTBTHERMOSTAT

C08120

Fig. 55 -- PremierLink Power Exhaust OutputConnection

NOTE: The Power Exhaust and Humidi--MiZerR optionscan not be used with PremierLink at the same time as bothoptions require connection at TB1--15 (AUX OUT).

CCN Communication Bus —

The PremierLink controller connects to the bus in a daisychain arrangement. Negative pins on each componentmust be connected to respective negative pins, andlikewise, positive pins on each component must beconnected to respective positive pins. The controllersignal pins must be wired to the signal ground pins.Wiring connections for CCN must be made at the 3--pinplug.

At any baud (9600, 19200, 38400 baud), the number ofcontrollers is limited to 239 devices maximum. Bus lengthmay not exceed 4000 ft, with no more than 60 totaldevices on any 1000--ft section. Optically isolated RS--485repeaters are required every 1000 ft.

NOTE: Carrier device default is 9600 band.

50TC

30

Communications Bus Wire Specifications: The CCNCommunication Bus wiring is field--supplied andfield--installed. It consists of shielded 3--conductor cablewith drain (ground) wire. The cable selected must beidentical to the CCN Communication Bus wire used forthe entire network.

See Table 6 for recommended cable.

Table 6 – Recommended Cables

MANUFACTURER CABLE PART NO.

Alpha 2413 or 5463

American A22503

Belden 8772

Columbia 02525

NOTE: Conductors and drain wire must be at least 20AWG, stranded, and tinned copper. Individual conductorsmust be insulated with PVC, PVC/nylon, vinyl, Teflon, orpolyethylene. An aluminum/polyester 100% foil shield andan outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflonwith a minimum operating temperature range of --20_C to60_C is required. Do not run communication wire in thesame conduit as or next to any AC voltage wiring.

The communication bus shields must be tied together ateach system element. If the communication bus is entirelywithin one building, the resulting continuous shield mustbe connected to ground at only one single point. If thecommunication bus cable exits from one building andenters another building, the shields must be connected tothe grounds at a lightning suppressor in each building (onepoint only).

Connecting CCN bus:

NOTE: When connecting the communication bus cable,a color code system for the entire network isrecommended to simplify installation and checkout. SeeTable 7 for the recommended color code.

Table 7 – Color Code Recommendations

SIGNAL TYPE CCN BUS WIRECOLOR

CCN PLUG PINNUMBER

+ Red 1

Ground White 2

--- Black 3

Connect the CCN (+) lead (typically RED) to the unit’sTB1--12 terminal. Connect the CCN (ground) lead(typically WHT) to the unit’s TB1--14 terminal. Connectthe CCN (--) lead (typically BLK) to the unit’s TB1--16terminal. See Fig. 56.

CCN Bus

J2-1

J2-2GND (WHT)

12

14TB1

J2-3– (BLK) 16TB1

TB1 PL+ (RED)

C08276

Fig. 56 -- PremierLink CCN Bus Connections

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31

RTU Open Control System

The RTU Open control is factory--mounted in the 50TCunit’s main control box, to the left of the CTB. SeeFig. 58 (or Fig. 59). Factory wiring is completed throughharnesses connected to the CTB. Field connections forRTU Open sensors will be made at the Phoenix connectorson the RTU Open board. The factory--installed RTU Opencontrol includes the supply--air temperature (SAT) sensor.The outdoor air temperature (OAT) sensor is included inthe FIOP/accessory EconoMi$er2 package.

The RTU Open controller is an integrated component of theCarrier rooftop unit. Its internal application programmingprovides optimum performance and energy efficiency. RTUOpen enables the unit to run in 100% stand--alone controlmode, Carrier’s I--Vu Open network, or a Third PartyBuilding Automation System (BAS). On--board DIPswitches allow you to select your protocol (and baud rate) ofchoice among the four most popular protocols in use today:BACnet, Modbus, Johnson N2 and LonWorks. (See Fig. 57.)

Refer to Table 8, RTU Open Controller Inputs and Outputsfor locations of all connections to the RTU Open board.

J4J2J1

J5 J5

J22

J17

J19 J14

J11

J22

J3

J13

J12

J15J20

Network Comm

Configurable - Input_8

24 VAC

Configurable - Input_5

24 VAC

Configurable - Input_3

24 VAC

Input_9 (Hum

idistat)24 VA

C

24 VAC

Input _8 (Enthalpy)A

O-1 (EC

ON

)G

nd(O

AT)G

nd(SAT)

Input_5 (SMK

)

Input_4 (R)

B

O-5 (Y1)

B

O-4 (Y2)

B

O-3 (W

1)

BO

-2 (W2)

B

O-1 (G

)

Gnd

Input_3 (X)

24 VA

C IN

+24 VDC

Input_2 (CO

2/RH

)G

nd+24 VD

CInput_1 (C

O2/R

H)

Gnd

Board Power

(AO-1)

0-10VDC

4-20mA

BO-6(H) HumidimizerBO-7 (Reversing Valve/High Speed Fan/Y3)

BO-8(Power Exhaust)

LonWorksOption CardPort

Example set forBACnet MS/TPand 76.8K baud(1, 2, and 4 ON)Recommended for alli-Vu Open installations

Protocol Selector SPT (temp input) BACnet, Modbus, or N2(LON connection J15)SPT (common)

SPT (offset input)

*Removeboth for 0-5V

AO-2GND

(2-10V)

3-VoltLithiumBattery

BO-1 BO-2 BO-3 BO-4 BO-5

BO-6

BO-7

BO-8

VFD Output

C14129Fig. 57 -- RTU Open Multi--Protocol Control Board

50TC

32

C150158Fig. 58 -- RTU Open System Control Wiring Diagram

50TC

33

C150159Fig. 59 -- RTU Open System Control Wiring Diagram with Humidi--MiZerR

50TC

34

Table 8 – RTU Open Controller Inputs and Outputs

POINT NAME BACnet OBJECTNAME TYPE OF I/O CONNECTION PIN

NUMBER(S) CHANNEL DESIGNATION

DEDICATED INPUTSSpace Temp / Zone Temp zone_temp AI (10K Thermistor) J20---1 & 2 Analog Input 10

Supply Air Temperature sa_temp AI (10K Thermistor) J2---1 & 2 Analog Input 6

Outside Air Temperature oa_temp AI (10K Thermistor) J2---3 & 4 Analog Input 7

Space Temperature Offset Pot stpt_adj_offset AI (100K Potentiometer) J20---3 & 4 Analog Input 11

Safety Chain Feedback safety_status BI (24 VAC) J1---9 Binary Input 4

Compressor Safety Status (1) comp_status BI (24 VAC) J1---2 Binary Input 3

Fire Shutdown Status firedown_status BI (24 VAC) J1---10 Binary Input 5

Enthalpy Status enthalpy_status BI (24 VAC) J2---6 & 7 Binary Input 8

Humidistat Input Status humstat_status BI (24 VAC) J5---7 & 8 Binary Input 9

Zone Temperature n/a n/a J13---1---4 Rnet

CONFIGURABLE INPUTS (4)

Indoor Air CO2 iaq AI (4---20 mA)J4---2 & 3 or J4---5 & 6

Analog Input 2

Outdoor Air CO2 oaq AI (4---20 mA) Analog Input 1

Space Relative Humidity space_rh AI (4---20 mA) Analog Input 10

Supply Fan Status (2) sfan_status BI (24 VAC)

J5---1 & 2 or J5---3 & 4,J5---5 & 6 or J5---7 & 8 (3)

Binary Input 3, 5, 8, or 9, except where intrinsic input is used

Filter Status (2) filter_status BI (24 VAC) Binary Input 3, 5, 8, or 9, except where intrinsic input is used

Door Contact (2) door_contact_status BI (24 VAC) Binary Input 3, 5, 8, or 9, except where intrinsic input is used

Remote Occupancy input (2) occ_contact_status BI (24 VAC) Binary Input 3, 5, 8, or 9, except where intrinsic input is used

IGC input (2) igcovr_status BI (24 VAC) Binary Input 9. Mandatory input on gas heat units.

OUTPUTSEconomizer Output econ_output AO (4---20mA) J2---5 Analog Output 1

Supply Fan VFD vfd_output AO (2---10Vdc) J22---1 & 2 Analog Output 2

Supply Fan Relay sfan BO Relay (24VAC, 1A) J1---4 Binary Output 1 (G)

Cool 1 Relay State comp_1 BO Relay (24VAC, 1A) J1---8 Binary Output 5 (Y1)

Cool 2 Relay State comp_2 BO Relay (24VAC, 1A) J1---7 Binary Output 4 (Y2)

Cool 3 Relay State comp_3 BO Relay (24VAC, 1A) J11---5 & 6 Binary Output 7 (Y3)

Heat 1 Relay State heat_1 BO Relay (24VAC, 1A) J1---6 Binary Output 3 (W1)

Heat 2 Relay State heat_2 BO Relay (24VAC, 1A) J1---5 Binary Output 2 (W2)

Power Exhaust Relay State pexh BO Relay (24VAC, 1A) J11---2 & 3 (N.O.) Binary Output 8 (PE)

Dehumidification Relay dehum BO Relay (24VAC, 1A) J11---7 & 8 (N.O.) Binary Output 6

LEGENDAI --- Analog InputAO --- Analog OutputDI --- Discrete InputDO --- Discrete Output* These inputs (if installed) take the place of the default input on the specific channel according to schematic.Parallel pins J5---1 = J2---6, J5---3 = J1---10, J5---5 = J1---2 are used for field--- installation.

The RTU Open controller requires the use of a Carrierspace sensor. A standard thermostat cannot be used withthe RTU Open system.

Supply Air Temperature (SAT) Sensor —

On FIOP--equipped 50TC unit, the unit is supplied with asupply--air temperature (SAT) sensor (33ZCSENSAT).This sensor is a tubular probe type, approx 6--inches (152mm) in length. It is a nominal 10--k ohm thermistor.

The SAT is factory--wired. The SAT probe is wire--tied tothe supply--air opening (on the horizontal opening end) inits shipping position. Remove the sensor for installation.Re--position the sensor in the flange of the supply--airopening or in the supply air duct (as required by localcodes). Drill or punch a 1/2--in. hole in the flange or duct.Use two field--supplied, self--drilling screws to secure thesensor probe in a horizontal orientation. See Fig. 40.

Outdoor Air Temperature (OAT) Sensor —

The OAT is factory--mounted in the EconoMi$er2 (FIOPor accessory). It is a nominal 10k ohm thermistor attachedto an eyelet mounting ring.

EconoMi$er2 —

The RTU Open control is used with EconoMi$er2 (optionor accessory) for outdoor air management. The damperposition is controlled directly by the RTU Open control;EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced withfield--installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors)Space CO2 sensorOutdoor air CO2 sensor

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35

Field Connections

Field connections for accessory sensors and input devicesare made the RTU Open, at plugs J1, J2, J4, J5, J11 andJ20. All field control wiring that connects to the RTUOpen must be routed through the raceway built into thecorner post as shown in Fig. 26. The raceway provides theUL required clearance between high-- and low--voltagewiring. Pass the control wires through the hole provided inthe corner post, then feed the wires thorough the racewayto the RTU Open. Connect to the wires to the removablePhoenix connectors and then reconnect the connectors tothe board.

Space Temperature (SPT) Sensors —

There are two types of SPT sensors available from Carrier,resistive input non-communicating (T55, T56, and T59)and Rnet communicating (SPS, SPPL, SPP, and SPPF)sensors. Each type has a variety of options consisting of:timed override button, set point adjustment, a LCDscreen, and communication tie in. Space temperature canbe also be written to from a building network or zoningsystem. However, it is still recommended that return airduct sensor be installed to allow stand-alone operation forback-up. Refer to the configuration section for details oncontroller configurations associated with space sensors.

S 33ZCT55SPT, space temperature sensor with overridebutton

S 33ZCT56SPT, space temperature sensor with overridebutton and setpoint adjustment

S 33ZCT59SPT, space temperature sensor with LCD(liquid crystal display) screen, override button, andsetpoint adjustment

Use 20 gauge wire to connect the sensor to the controller.The wire is suitable for distances of up to 500 ft. Use athree--conductor shielded cable for the sensor and setpointadjustment connections. If the setpoint adjustment(slidebar) is not required, then an unshielded, 18 or 20gauge, two--conductor, twisted pair cable may be used.

Connect T--55: See Fig. 41 for typical T--55 internalconnections. Connect the T--55 SEN terminals to RTUOpen J20--1 and J20--2. See Fig. 60.

SEN

SEN

J20-1

J20-2

C08460

Fig. 60 -- RTU Open T--55 Sensor Connections

Connect T--56: See Fig. 43 for T--56 internal connections.Install a jumper between SEN and SET terminals asillustrated. Connect T--56 terminals to RTU Open J20--1,J20--2 and J20--3 per Fig. 61.

SEN J20-1

J20-2SEN

SET

Jumper

J20-3SET

C08461

Fig. 61 -- RTU Open T--56 Sensor Connections

Connect T--59: The T--59 space sensor requires aseparate, isolated power supply of 24 VAC. See Fig. 62for internal connections at the T--59. Connect the SENterminal (BLU) to RTU Open J20--1. Connect the COMterminal (BRN) to J20--2. Connect the SET terminal (STOor BLK) to J20--3.

OR SET SEN

OPB COM- PWR+

BLU (SPT)

BLK (STO)

24 VAC

SENSORWIRING

POWERWIRING

BRN (COM)

NOTE: Must use a separate isolated transformer.

J20-3

J20-2

J20-1

C10291

Fig. 62 -- Space Temperature Sensor Typical Wiring(33ZCT59SPT)

Indoor Air Quality (CO2) Sensor —

The indoor air quality sensor accessory monitors spacecarbon dioxide (CO2) levels. This information is used tomonitor IAQ levels. Several types of sensors are available,for wall mounting in the space or in return duct, with andwithout LCD display, and in combination with spacetemperature sensors. Sensors use infrared technology tomeasure the levels of CO2 present in the space air.

The CO2 sensors are all factory set for a range of 0 to2000 ppm and a linear mA output of 4 to 20. Refer to theinstructions supplied with the CO2 sensor for electricalrequirements and terminal locations. See Fig. 46 fortypical CO2 sensor wiring schematic.

To accurately monitor the quality of the air in theconditioned air space, locate the sensor near a return--airgrille (if present) so it senses the concentration of CO2leaving the space. The sensor should be mounted in alocation to avoid direct breath contact.

50TC

36

Do not mount the IAQ sensor in drafty areas such as nearsupply ducts, open windows, fans, or over heat sources.Allow at least 3 ft (0.9 m) between the sensor and anycorner. Avoid mounting the sensor where it is influencedby the supply air; the sensor gives inaccurate readings ifthe supply air is blown directly onto the sensor or if thesupply air does not have a chance to mix with the room airbefore it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor: For each sensor,use two 2--conductor 18 AWG (American Wire Gage)twisted--pair cables (unshielded) to connect the separateisolated 24 vac power source to the sensor and to connectthe sensor to the control board terminals.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIG COM) terminals on thesensor. See Fig. 46. Connect the 4--20 mA terminal toRTU Open J4--2 and connect the SIG COM terminal toRTU Open J4--3. See Fig. 63.

SEN

COM

J4-2

J4-3

IAQ Sensor

24 VACC08462

Fig. 63 -- RTU Open / Indoor CO2 Sensor(33ZCSENCO2) Connections

Outdoor Air Quality Sensor(PNO 33ZCSENCO2 plus weatherproof enclosure) —

The outdoor air CO2 sensor is designed to monitor carbondioxide (CO2) levels in the outside ventilation air andinterface with the ventilation damper in an HVAC system.The OAQ sensor is packaged with an outdoor cover. SeeFig. 48. The outdoor air CO2 sensor must be located in theeconomizer outside air hood.

Wiring the Outdoor Air CO2 Sensor: A dedicatedpower supply is required for this sensor. A two--wire cableis required to wire the dedicated power supply for thesensor. The two wires should be connected to the powersupply and terminals 1 and 2.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIG COM) terminals on theOAQ sensor. See Fig. 46. Connect the 4 to 20 mAterminal to RTU Open J4--5. Connect the SIG COMterminal to RTU Open J4--6. See Fig. 64

SEN

COM

J4-5

J4-6

OAQ Sensor

24 VACC11086

Fig. 64 -- RTU Open / Outdoor CO2 Sensor(33ZCSENCO2) Connections

Space Relative Humidity Sensor or Humidistat —

NOTE: The accessory space relative humidity sensor andhumidistat are not available for size 04--06 single phase(--3 voltage code) models.Humidi--MiZerR Control Wiring: In units equippedwith the Humidi--MiZer option there are two pink (PNK)wires loose in the control box used to control thedehumidification function of the unit. These pink wiresare meant to be tied to a space humidistat or thermidistaton an electromechanical unit. On RTU Open equippedunits these pink wires must be connected to J11--7 & 8 toallow the Open board to operate the dehumidificationfunction for the unit. Disconnect the J11 Phoenix styleconnector from the board and use the plug screws tosecure the pink wires in pins 7 and 8, reconnect the plugto the board at J11.NOTE: The Humidi--MiZer is a factory installed optionwhich is available for 07 models only.

Relative Humidity Sensors (Space or Duct Mounted):The accessory space humidity sensor (33ZCSENSRH-01)or duct humidity sensor (33ZCSENDRH-01) is used tomeasure the relative humidity of air within the space orreturn air duct. The RH reading is used to control theHumidi--MiZer option of the rooftop unit. For wiringdistances up to 500 ft (152 m), use a 3--conductor, 18 or20 AWG shielded cable. The shield must be removedfrom the sensor end of the cable and grounded at the unitend. The current loop power for sensor is provided by theRTU Open controller as 24vdc. Refer to the instructionssupplied with the RH sensor for the electricalrequirements and terminal locations. RTU Openconfigurations must be changed after adding an RHsensor. See Fig. 65 and 66 for typical RH sensor wiring.

S J4--1 or J4--4 = 24vdc loop power

S J4--2 or J4--5 = 4--20mA signal input

NOTE: The factory default for dehumidification controlis normally open humidistat.

SW2123456

ON

Io Vin Gnd Vo

MOUNTINGHOLES

WIRINGOPENING

Vin - J4-1 or J4-4 24VdcIo - J4-2 or J4-5 -20mA output

C11087

Fig. 65 -- Space Relative humidity Sensor Typical Wiring

50TC

37

SPAN

ZERO

4-20mA

VACor

VDC

GND 0-5Vor

0-10V

123456

ON

J4-1 or J4-4 + 24 VDC Supply Voltage

J4-2 or J4-5 (-)4 to 20 mA Current Loop Outputto RTU Open

Relative Humidity Sensor(Polarized Male Connector)

C12756

Fig. 66 -- Duct Relative Humidity Sensor Typical Wiring

Humidistat: The accessory humidistat provides the RTUOpen insight to the relative humidity in the space. Thehumidistat reads the RH level in the space and compares itto its setpoint to operate a dry contact. The humidistat is adedicated input on the configurable input 9 and tells theRTU Open when the RH level is HIGH or LOW. Thenormal condition for humidity is LOW. A normally openhumidistat is the factory default control for theHumidi--MiZerR option.To wire in the field:S J5--8 = 24 VAC source for dry contact

S J5--7 = Signal input

Smoke Detector/Fire Shutdown (FSD) —

On 50TC units equipped with factory--installed SmokeDetector(s), the smoke detector controller implements theunit shutdown through its NC contact set connected to theunit’s CTB input. The FSD function is initiated via thesmoke detector’s Alarm NO contact set. The RTU Opencontroller communicates the smoke detector’s trippedstatus to the BAS building control. See Fig. 58 or Fig. 59(RTU Open System Control wiring schematics).

The Fire Shutdown Switch configuration,MENUConfigInputsinput 5, identifies the normallyopen status of this input when there is no fire alarm.

Connecting Discrete Inputs —

Filter Status: The filter status accessory is afield--installed accessory. This accessory detects pluggedfilters. When installing this accessory, the unit must beconfigured for filter status by settingMENUConfigInputsinput 3, 5, 8, or 9 to FilterStatus and normally open (N/O) or normally closed (N/C).Input 8 or 9 is recommended for easy of installation. Referto Fig. 57 and Fig. 58 or Fig. 59 for wire terminations at J5.

Fan Status: The fan status accessory is a field--installedaccessory. This accessory detects when the indoor fan isblowing air. When installing this accessory, the unit must beconfigured for fan status by settingMENUConfigInputsinput 3, 5, 8, or 9 to Fan Statusand normally open (N/O) or normally closed (N/C). Input 8or 9 is recommended for easy of installation. Refer to Fig.57 and Fig. 58 or Fig. 59 for wire terminations at J5.

Remote Occupancy: The remote occupancy accessory isa field--installed accessory. This accessory overrides theunoccupied mode and puts the unit in occupied mode.When installing this accessory, the unit must beconfigured for remote occupancy by settingMENUConfigInputsinput 3, 5, 8, or 9 to RemoteOccupancy and normally open (N/O) or normally closed(N/C).

Also set MENUSchedulesoccupancy source to DIon/off. Input 8 or 9 is recommended for easy ofinstallation. Refer to Fig. 57 and Table 8 for wireterminations at J5.

Power Exhaust (output): The relay used by the RTUOpen board to control power exhaust is a dry contactwhich means it does not have 24vac. This 24vac must beconnected to the relay to allow it to operate the powerexhaust relay in the PE accessory. A 24vac source must beprovided to J11--2 on the RTU Open control board. Thiscan be provided by the unit’s transformer from varioussources. The “R” terminal on the unit’s low voltageterminal board (LVTB) is a logical source. Refer to Fig.57 and Fig. 58 or Fig. 59 for wire terminations at J11.

50TC

38

Communication Wiring -- Protocols

General —

Protocols are the communication languages spoken bycontrol devices. The main purpose of a protocol is tocommunicate information in the most efficient methodpossible. Different protocols exist to provide differentkinds of information for different applications. In the BASapplication, many different protocols are used, dependingon manufacturer. Protocols do not change the function ofa controller; just make the front end user different.

The RTU Open can be set to communicate on fourdifferent protocols: BACnet, Modbus, N2, and LonWorks.Switch 3 (SW3) on the board is used to set protocol andbaud rate. Switches 1 and 2 (SW1 and SW2) are used toset the board’s network address. See Fig. 67 and 68 forprotocol switch settings and address switches. The 3rdparty connection to the RTU Open is through plug J19.See Fig. 69 for wiring.NOTE: Power must be cycled after changing the SW1--3switch settings.

Refer to the RTU Open v3 Integration Guide for moredetailed information on protocols, 3rd party wiring, andnetworking.

SW3 Protocol Selection

PROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1BACnet MS/TP(Master) Unused OFF OFF OFF ON OFF Select Baud Select Baud

Modbus(Slave) Unused OFF OFF ON ON OFF Select Baud Select Baud

N2(Slave) Unused OFF OFF OFF ON ON OFF OFF

LonWorks Unused ON ON OFF ON OFF OFF ON

NOTE:DS = Dip SwitchBACnet MS/TP SW3 example shown

Baud Rate Selections

BAUD RATE DS2 DS19600 OFF OFF

19,200 ON OFF

38,400 OFF ON

76,800 ON ONC07166

Fig. 67 -- RTU Open SW3 Dip Switch Settings

C10815

Fig. 68 -- RTU Open Address Switches

C10816Fig. 69 -- Network Wiring

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39

Local Access

Wall Mounted Equipment TouchThe Equipment Touch is a wall mounted interface used toconnect to the RTU Open to access the controlinformation, read sensor values, and maintenance. This isan accessory interface that does not come with the RTUOpen controller. You wire the Equipment Touch to theRTU Open’s J13 local access port. There are 2 passwordprotected levels in the display (User and Admin). See theEquipment Touch Installation and Setup Guide for moreinformation. See Appendix A for navigation and screencontent.

Field AssistantField Assistant is a computer program included with thepurchase of the Tech Tool Kit (USB-TKIT). This is a fieldTech Tool to set-up, service, or download applicationsoftware to the RTU Open controller and includes a USBLink Cable. The link cable connects a USB port to the J12local access port. The Field Assistant’s menu structure issimilar and functions the same as i--VuR. See Fig. 70.

RTU Open Troubleshooting —

Communication LEDs: The LEDs indicate if thecontroller is speaking to the devices on the network. TheLEDs should reflect communication traffic based on thebaud rate set. The higher the baud rate the more solid theLEDs will appear. See Table 9.

Connect tocomputer’sUSB port

Connect tothe Local

Access portUSB Link Kit RTU Open

AccessPort

J12

P1 P1

P5 P5 LOCALACCESS

PORT

GN

D

GN

D

*Thermm

A

*Thermm

A

UI-10UI-11

SW3

on

CO

MM

OP

TIO

N

CR2032

+-

SW1 SW2

MSB LSB

TXRX

+12 DVCRnet-Rnet+GND

RNET

J12

J13

J15J20

C14131

Fig. 70 -- PC Running Field Assistant

50TC

40

Table 9 – LEDsThe LEDs on the RTU Open show the status of certain functions

If this LED is on... Status is...Power The RTU Open has powerRx The RTU Open is receiving data from the network segmentTx The RTU Open is transmitting data over the network segmentBO# The binary output is active

The Run and Error LEDs indicate control module and network status

If Run LED shows... And Error LED shows... Status is...2 flashes per second Off Normal2 flashes per second 2 flashes, alternating with Run LED Five minute auto---restart delay after system error2 flashes per second 3 flashes, then off Control module has just been formatted2 flashes per second 4 flashes, then pause Two or more devices on this network have the

same MSTP network address2 flashes per second On Exec halted after frequent system errors or

control programs halted5 flashes per second On Exec start---up aborted, Boot is running5 flashes per second Off Firmware transfer in progress, Boot is running7 flashes per second 7 flashes per second, alternating with

Run LEDTen second recovery period after brownout

14 flashes per second 14 flashes per second,alternating with Run LED

Brownout

On On Failure. Try the following solutions:S Turn the RTU Open off, then on.S Format the RTU Open.S Download memory to the RTU Open.S Replace the RTU Open.

NOTE: Refer to the RTU Open Multi--Protocol ControllerControls, Start--Up, Operation and Troubleshooting manualfor complete configuration of RTU Open, operatingsequences and troubleshooting information. Refer to theRTU Open v3 Integration Guide for details on configurationand troubleshooting of connected networks. Have a copy ofthese manuals available at unit start--up

Outdoor Air Enthalpy Control(PNO 33CSENTHSW)

The enthalpy control (33CSENTHSW) is available as afield--installed accessory to be used with the EconoMi$er2damper system. The outdoor air enthalpy sensor is part ofthe enthalpy control. (The separate field--installedaccessory return air enthalpy sensor (33CSENTSEN) isrequired for differential enthalpy control. See Fig. 71.)

Locate the enthalpy control in the economizer next to theActuator Motor. Locate two GRA leads in the factoryharness and connect the gray lead labeled “ESL” to theterminal labeled “LOW”. See Fig. 71. Connect the enthalpycontrol power input terminals to economizer actuator powerleads RED (connect to 24V) and BLK (connect to GND).

7 CTB ECON(P’LINK: to J4-2) or(RTU Open: to J2-6)

LOW

GND

24V

EnthalpySwitch

GRA

BLK

RED

Factory Wiring Harness

PL6-1 (24-V)

PL6-4 (COM)

C11160

Fig. 71 -- Enthalpy Switch (33CSENTHSW) Connections

The outdoor enthalpy changeover setpoint is set at theenthalpy controller.

Differential Enthalpy Control —

Differential enthalpy control is provided by sensing andcomparing the outside air and return air enthalpyconditions. Install the outdoor air enthalpy control asdescribed above. Add and install a return air enthalpysensor.

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41

Return Air Enthalpy Sensor —

Mount the return--air enthalpy sensor (33CSENTSEN) inthe return--air section of the economizer. The return airsensor is wired to the enthalpy controller(33CSENTHSW). See Fig. 72.

GRA

BLK

RED– 4-20 Main

+ VDC Out

– 4-20 Main Out

+ 24-36 VDC In

LOW

GND

24V

7

PL6-1 (24-V)

PL6-4 (COM)

Outside AirEnthalpy Switch

Return AirEnthalpySensor

CTB ECON(P’LINK: to J4-2) or(RTU Open: to J2-6)

C11161

Fig. 72 -- Outside and Return Air Enthalpy SensorWiring

Smoke Detectors

Smoke detectors are available as factory--installed options on50TC models. Smoke detectors may be specified for SupplyAir only or for Return Air without or with economizer or incombination of Supply Air and Return Air. All componentsnecessary for operation are factory--provided and mounted.The unit is factory--configured for immediate smoke detectorshutdown operation; additional wiring or modifications tounit terminal board may be necessary to complete the unitand smoke detector configuration to meet projectrequirements.

Units equipped with factory--optional Return Air smokedetectors require a relocation of the sensor module at unitinstallation. See Fig. 73 for the as shipped location.

Return Air Smoke Detector(as shipped)

C12282

Fig. 73 -- Return Air Smoke Detector, Shipping Position

Completing Installation of Return Air Smoke Sensor:1. Unscrew the two screws holding the Return Air

Smoke Detector assembly. See Fig. 74, Step 1. Savethe screws.

2. Turn the assembly 90 and then rotate end to end.Make sure that the elbow fitting is pointing down. SeeFig. 74, Step 2.

3. Screw the sensor and detector plate into its operatingposition using screws from Step 1. See Fig. 74, Step 3.

4. Connect the flexible tube on the sampling inlet to thesampling tube on the basepan.

Additional Application Data —

Refer to Catalog No. HKRNKA--1XA for discussions onadditional control features of these smoke detectorsincluding multiple unit coordination.

Step 1 Step 2 Step 3C12283

Fig. 74 -- Completing Installation of Return Air Smoke Sensor

50TC

42

Tab

le10

–U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a

UNIT

NOM.V---Ph---HZ

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER***A00

Nom(kW)

FLA

NOP.E.

w/P.E.(pwrdfr/unit)

NOP.E.

w/P.E.(pwrdfr/unit)

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

50TC**04

208/230---1---60

STD

NONE

------

2840

2695

3045

2997

------

------

------

------

101A

3.3/4.4

15.9/18.3

28/29

40/40

26/27

95/95

30/32

45/45

29/29

97/97

------

------

------

------

102A

4.9/6.5

23.5/27.1

36/40

40/45

33/37

95/95

38/43

45/45

35/39

97/97

------

------

------

------

103B

6.5/8.7

31.4/36.3

46/52

50/60

42/47

95/95

48/54

50/60

44/50

97/97

------

------

------

------

104B

7.9/10.5

37.9/43.8

54/61

60/70

49/56

95/95

56/64

60/70

51/58

97/97

------

------

------

------

102A+102A

9.8/13.0

46.9/54.2

65/74

70/80

60/68

95/95

68/77

70/80

62/70

97/97

------

------

------

------

MED

NONE

------

2840

2695

3045

2997

------

------

------

------

101A

3.3/4.4

15.9/18.3

28/29

40/40

26/27

95/95

30/32

45/45

29/29

97/97

------

------

------

------

102A

4.9/6.5

23.5/27.1

36/40

40/45

33/37

95/95

38/43

45/45

35/39

97/97

------

------

------

------

103B

6.5/8.7

31.4/36.3

46/52

50/60

42/47

95/95

48/54

50/60

44/50

97/97

------

------

------

------

104B

7.9/10.5

37.9/43.8

54/61

60/70

49/56

95/95

56/64

60/70

51/58

97/97

------

------

------

------

102A+102A

9.8/13.0

46.9/54.2

65/74

70/80

60/68

95/95

68/77

70/80

62/70

97/97

------

------

------

------

208/230---3---60

DD---

STD

NONE

------

2130

2183

2330

2385

2630

2688

2830

2890

101A

3.3/4.4

9.2/10.6

21/21

30/30

21/21

83/83

23/24

30/30

23/23

85/85

26/27

30/30

26/26

88/88

28/30

30/30

28/28

90/90

102A

4.9/6.5

13.6/15.6

25/27

30/30

23/25

83/83

27/30

30/30

25/27

85/85

31/33

35/35

28/30

88/88

33/36

35/40

30/33

90/90

103B

6.5/8.7

18.1/20.9

31/34

35/35

28/31

83/83

33/36

35/40

30/33

85/85

37/40

40/40

33/36

88/88

39/42

40/45

35/39

90/90

104B

7.9/10.5

21.9/25.3

35/40

35/40

32/36

83/83

38/42

40/45

34/38

85/85

41/46

45/50

38/42

88/88

44/48

45/50

40/44

90/90

105A

12.0/16.0

33.4/38.5

50/56

50/60

45/51

83/83

52/58

60/60

47/53

85/85

56/62

60/70

51/57

88/88

58/64

60/70

53/59

90/90

STD

NONE

------

2030

2096

2230

2298

2530

25101

2730

27103

101A

3.3/4.4

9.2/10.6

20/20

30/30

20/20

96/96

22/23

30/30

22/22

98/98

25/26

30/30

25/25

101/101

27/29

30/30

27/27

103/103

102A

4.9/6.5

13.6/15.6

24/26

30/30

22/24

96/96

26/29

30/30

24/26

98/98

30/32

30/35

27/29

101/101

32/35

35/35

29/32

103/103

103B

6.5/8.7

18.1/20.9

30/33

30/35

27/30

96/96

32/35

35/40

29/32

98/98

36/39

40/40

32/36

101/101

38/41

40/45

35/38

103/103

104B

7.9/10.5

21.9/25.3

34/39

35/40

31/35

96/96

37/41

40/45

33/37

98/98

40/45

40/45

37/41

101/101

43/47

45/50

39/43

103/103

105A

12.0/16.0

33.4/38.5

49/55

50/60

44/50

96/96

51/57

60/60

47/52

98/98

55/61

60/70

50/56

101/101

57/63

60/70

52/58

103/103

MED

NONE

------

2030

2096

2230

2298

2530

25101

2730

27103

101A

3.3/4.4

9.2/10.6

20/20

30/30

20/20

96/96

22/23

30/30

22/22

98/98

25/26

30/30

25/25

101/101

27/29

30/30

27/27

103/103

102A

4.9/6.5

13.6/15.6

24/26

30/30

22/24

96/96

26/29

30/30

24/26

98/98

30/32

30/35

27/29

101/101

32/35

35/35

29/32

103/103

103B

6.5/8.7

18.1/20.9

30/33

30/35

27/30

96/96

32/35

35/40

29/32

98/98

36/39

40/40

32/36

101/101

38/41

40/45

35/38

103/103

104B

7.9/10.5

21.9/25.3

34/39

35/40

31/35

96/96

37/41

40/45

33/37

98/98

40/45

40/45

37/41

101/101

43/47

45/50

39/43

103/103

105A

12.0/16.0

33.4/38.5

49/55

50/60

44/50

96/96

51/57

60/60

47/52

98/98

55/61

60/70

50/56

101/101

57/63

60/70

52/58

103/103

HIGH

NONE

------

22/22

30/30

22/21

134

24/24

30/30

24/24

136

27/26

30/30

27/27

139

29/28

35/35

29/29

141

101A

3.3/4.4

9.2/10.6

22/22

30/30

22/21

134/134

24/24

30/30

24/24

136/136

27/28

30/30

27/27

139/139

29/30

35/35

29/29

141/141

102A

4.9/6.5

13.6/15.6

26/28

30/30

24/26

134/134

28/31

30/35

26/28

136/136

32/34

35/35

29/31

139/139

34/37

35/40

31/33

141/141

103B

6.5/8.7

18.1/20.9

32/35

35/35

29/32

134/134

34/37

35/40

31/34

136/136

38/41

40/45

34/37

139/139

40/43

40/45

36/39

141/141

104B

7.9/10.5

21.9/25.3

36/40

40/40

33/37

134/134

39/43

40/45

35/39

136/136

42/46

45/50

39/42

139/139

45/49

45/50

41/45

141/141

105A

12.0/16.0

33.4/38.5

51/57

60/60

46/52

134/134

53/59

60/60

49/54

136/136

57/63

60/70

52/58

139/139

59/65

60/70

54/60

141/141

See“LegendandNotesforTable10onpage50.

48HC

50TC

43

Tabl

e10

--U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont)

UNIT

NOM.V---Ph---HZ

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER***A00

Nom(kW)

FLA

NOP.E.

w/P.E.(pwrdfr/unit)

NOP.E.

w/P.E.(pwrdfr/unit)

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

50TC**04

460---3---60

STD

NONE

------

1115

1149

1215

1250

1315

1351

1420

1452

106A

6.0

7.2

1315

1149

1415

1250

1515

1451

1720

1552

107A

8.8

10.6

1720

1549

1820

1650

2020

1851

2125

1952

108A

11.5

13.8

2125

1949

2225

2050

2425

2151

2525

2352

109A

14.0

16.8

2525

2249

2630

2350

2730

2551

2930

2652

MED

NONE

------

1115

1149

1215

1250

1315

1351

1420

1452

106A

6.0

7.2

1315

1149

1415

1250

1515

1451

1720

1552

107A

8.8

10.6

1720

1549

1820

1650

2020

1851

2125

1952

108A

11.5

13.8

2125

1949

2225

2050

2425

2151

2525

2352

109A

14.0

16.8

2525

2249

2630

2350

2730

2551

2930

2652

HIGH

NONE

------

1215

1268

1315

1369

1420

1470

1520

1571

106A

6.0

7.2

1415

1268

1515

1369

1620

1570

1820

1671

107A

8.8

10.6

1820

1668

1920

1769

2125

1970

2225

2071

108A

11.5

13.8

2225

2068

2325

2169

2525

2270

2630

2371

109A

14.0

16.8

2630

2368

2730

2469

2830

2670

3030

2771

575---3---60

STD

NONE

------

815

846

1015

1048

1015

1048

1215

1250

MED

NONE

------

815

846

1015

1048

1015

1048

1215

1250

HIGH

NONE

------

815

750

1015

1052

1015

952

1115

1254

See“LegendandNotesforTable10onpage50.

48HC

50TC

44

Tabl

e10

--U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont)

UNIT

NOM.V---Ph---HZ

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER***A00

Nom(kW)

FLA

NOP.E.

w/P.E.(pwrdfr/unit)

NOP.E.

w/P.E.(pwrdfr/unit)

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

50TC**05

208/230---1---60

STD

NONE

------

3450

32133

3650

35135

------

------

------

------

101A

3.3/4.4

15.9/18.3

34/34

50/50

32/32

133/133

36/36

50/50

35/35

135/135

------

------

------

------

103B

6.5/8.7

31.4/36.3

46/52

50/60

42/47

133/133

48/54

50/60

44/50

135/135

------

------

------

------

102A+102A

9.8/13.0

46.9/54.2

65/74

70/80

60/68

133/133

68/77

70/80

62/70

135/135

------

------

------

------

103B+103B

13.1/17.4

62.8/72.5

85/97

90/100

78/89

133/133

87/100

90/100

80/91

135/135

------

------

------

------

104B+104B

15.8/21.0

75.8/87.5

101/116

110/125

93/106

133/133

104/118

110/125

95/108

135/135

------

------

------

------

MED

NONE

------

3450

32133

3650

35135

------

------

------

------

101A

3.3/4.4

15.9/18.3

34/34

50/50

32/32

133/133

36/36

50/50

35/35

135/135

------

------

------

------

103B

6.5/8.7

31.4/36.3

46/52

50/60

42/47

133/133

48/54

50/60

44/50

135/135

------

------

------

------

102A+102A

9.8/13.0

46.9/54.2

65/74

70/80

60/68

133/133

68/77

70/80

62/70

135/135

------

------

------

------

103B+103B

13.1/17.4

62.8/72.5

85/97

90/100

78/89

133/133

87/100

90/100

80/91

135/135

------

------

------

------

208/230---3---60

DD---

STD

NONE

------

2530

2493

2730

2795

3040

3098

3245

32100

102A

4.9/6.5

13.6/15.6

25/27

30/30

24/25

93/93

27/30

30/30

27/27

95/95

31/33

40/40

30/30

98/98

33/36

45/45

32/33

100/100

103B

6.5/8.7

18.1/20.9

31/34

35/35

28/31

93/93

33/36

40/40

30/33

95/95

37/40

40/40

33/36

98/98

39/42

45/45

35/39

100/100

105A

12.0/16.0

33.4/38.5

50/56

50/60

45/51

93/93

52/58

60/60

47/53

95/95

56/62

60/70

51/57

98/98

58/64

60/70

53/59

100/100

104B+104B

15.8/21.0

43.8/50.5

63/71

70/80

57/65

93/93

65/73

70/80

59/67

95/95

69/77

70/80

63/70

98/98

71/79

80/80

65/73

100/100

STD

NONE

------

2430

23106

2630

26108

2940

29111

3140

31113

102A

4.9/6.5

13.6/15.6

24/26

30/30

23/24

106/106

26/29

30/30

26/26

108/108

30/32

40/40

29/29

111/111

32/35

40/40

31/32

113/113

103B

6.5/8.7

18.1/20.9

30/33

30/35

27/30

106/106

32/35

35/40

29/32

108/108

36/39

40/40

32/36

111/111

38/41

40/45

35/38

113/113

105A

12.0/16.0

33.4/38.5

49/55

50/60

44/50

106/106

51/57

60/60

47/52

108/108

55/61

60/70

50/56

111/111

57/63

60/70

52/58

113/113

104B+104B

15.8/21.0

43.8/50.5

62/70

70/70

56/64

106/106

64/72

70/80

59/66

108/108

68/76

70/80

62/70

111/111

70/78

70/80

64/72

113/113

MED

NONE

------

2430

23106

2630

26108

2940

29111

3140

31113

102A

4.9/6.5

13.6/15.6

24/26

30/30

23/24

106/106

26/29

30/30

26/26

108/108

30/32

40/40

29/29

111/111

32/35

40/40

31/32

113/113

103B

6.5/8.7

18.1/20.9

30/33

30/35

27/30

106/106

32/35

35/40

29/32

108/108

36/39

40/40

32/36

111/111

38/41

40/45

35/38

113/113

105A

12.0/16.0

33.4/38.5

49/55

50/60

44/50

106/106

51/57

60/60

47/52

108/108

55/61

60/70

50/56

111/111

57/63

60/70

52/58

113/113

104B+104B

15.8/21.0

43.8/50.5

62/70

70/70

56/64

106/106

64/72

70/80

59/66

108/108

68/76

70/80

62/70

111/111

70/78

70/80

64/72

113/113

HIGH

NONE

------

26/26

30/30

25/25

144

28/28

40/40

28/27

146

31/31

40/40

31/31

149

33/32

45/45

33/33

151

102A

4.9/6.5

13.6/15.6

26/28

30/30

25/26

144/144

28/31

40/40

28/28

146/146

32/34

40/40

31/31

149/149

34/37

45/45

33/33

151/151

103B

6.5/8.7

18.1/20.9

32/35

35/35

29/32

144/144

34/37

40/40

31/34

146/146

38/41

40/45

34/37

149/149

40/43

45/45

36/39

151/151

105A

12.0/16.0

33.4/38.5

51/57

60/60

46/52

144/144

53/59

60/60

49/54

146/146

57/63

60/70

52/58

149/149

59/65

60/70

54/60

151/151

104B+104B

15.8/21.0

43.8/50.5

64/72

70/80

58/66

144/144

66/74

70/80

60/68

146/146

70/78

70/80

64/71

149/149

72/80

80/80

66/73

151/151

See“LegendandNotesforTable10onpage50.

48HC

50TC

45

Tabl

e10

--U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont)

UNIT

NOM.V---Ph---HZ

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER***A00

Nom(kW)

FLA

NOP.E.

w/P.E.(pwrdfr/unit)

NOP.E.

w/P.E.(pwrdfr/unit)

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

50TC**05

460---3---60

STD

NONE

------

1215

1152

1315

1253

1415

1454

1520

1555

106A

6.0

7.2

1315

1152

1415

1253

1515

1454

1720

1555

108A

11.5

13.8

2125

1952

2225

2053

2425

2154

2525

2355

109A

14.0

16.8

2525

2252

2630

2353

2730

2554

2930

2655

108A+108A

23.0

27.7

3840

3552

4040

3653

4145

3754

4245

3955

MED

NONE

------

1215

1152

1315

1253

1415

1454

1520

1555

106A

6.0

7.2

1315

1152

1415

1253

1515

1454

1720

1555

108A

11.5

13.8

2125

1952

2225

2053

2425

2154

2525

2355

109A

14.0

16.8

2525

2252

2630

2353

2730

2554

2930

2655

108A+108A

23.0

27.7

3840

3552

4040

3653

4145

3754

4245

3955

HIGH

NONE

------

1215

1271

1315

1372

1520

1473

1620

1674

106A

6.0

7.2

1415

1271

1515

1372

1620

1573

1820

1674

108A

11.5

13.8

2225

2071

2325

2172

2525

2273

2630

2374

109A

14.0

16.8

2630

2371

2730

2472

2830

2673

3030

2774

108A+108A

23.0

27.7

3940

3671

4145

3772

4245

3873

4345

3974

575---3---60

STD

NONE

------

915

942

1115

1144

1115

1144

1315

1346

MED

NONE

------

915

942

1115

1144

1115

1144

1315

1346

HIGH

NONE

------

915

946

1115

1148

1115

1048

1315

1350

See“LegendandNotesforTable10onpage50.

48HC

50TC

46

Tabl

e10

--U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont)

UNIT

NOM.V---Ph---HZ

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER***A00

Nom(kW)

FLA

NOP.E.

w/P.E.(pwrdfr/unit)

NOP.E.

w/P.E.(pwrdfr/unit)

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

50TC**06

208/230---1---60

STD

NONE

------

4060

37150

4260

40152

------

------

------

------

102A

4.9/6.5

23.5/27.1

40/40

60/60

37/37

150/150

42/43

60/60

40/40

152/152

------

------

------

------

103B

6.5/8.7

31.4/36.3

46/52

60/60

42/47

150/150

48/54

60/60

44/50

152/152

------

------

------

------

102A+102A

9.8/13.0

46.9/54.2

65/74

70/80

60/68

150/150

68/77

70/80

62/70

152/152

------

------

------

------

103B+103B

13.1/17.4

62.8/72.5

85/97

90/100

78/89

150/150

87/100

90/100

80/91

152/152

------

------

------

------

104B+104B

15.8/21.0

75.8/87.5

101/116

110/125

93/106

150/150

104/118

110/125

95/108

152/152

------

------

------

------

MED

NONE

------

4260

40175

4460

42177

------

------

------

------

102A

4.9/6.5

23.5/27.1

42/43

60/60

40/40

175/175

44/45

60/60

42/42

177/177

------

------

------

------

103B

6.5/8.7

31.4/36.3

48/55

60/60

44/50

175/175

51/57

60/60

46/52

177/177

------

------

------

------

102A+102A

9.8/13.0

46.9/54.2

68/77

70/80

62/70

175/175

70/79

70/80

64/73

177/177

------

------

------

------

103B+103B

13.1/17.4

62.8/72.5

88/100

90/100

80/91

175/175

90/102

90/110

82/94

177/177

------

------

------

------

104B+104B

15.8/21.0

75.8/87.5

104/119

110/125

95/109

175/175

106/121

110/125

97/111

177/177

------

------

------

------

208/230---3---60

DD---

STD

NONE

------

2940

28122

3145

31124

3445

34127

3650

36129

102A

4.9/6.5

13.6/15.6

29/29

40/40

28/28

122/122

31/32

45/45

31/31

124/124

34/35

45/45

34/34

127/127

36/38

50/50

36/36

129/129

104B

7.9/10.5

21.9/25.3

37/42

40/45

34/38

122/122

40/44

45/45

36/40

124/124

43/48

45/50

39/43

127/127

46/50

50/50

42/46

129/129

105A

12.0/16.0

33.4/38.5

52/58

60/60

47/53

122/122

54/60

60/60

49/55

124/124

58/64

60/70

53/59

127/127

60/66

60/70

55/61

129/129

104B+104B

15.8/21.0

43.8/50.5

65/73

70/80

59/67

122/122

67/75

70/80

61/69

124/124

71/79

80/80

65/72

127/127

73/81

80/90

67/75

129/129

104B+105A

19.9/26.5

55.2/63.8

79/90

80/90

72/82

122/122

81/92

90/100

74/84

124/124

85/96

90/100

78/88

127/127

87/98

90/100

80/90

129/129

STD

NONE

------

2740

26133

2940

28135

3145

31138

3345

33140

102A

4.9/6.5

13.6/15.6

27/27

40/40

26/26

133/133

29/29

40/40

28/28

135/135

31/32

45/45

31/31

138/138

33/35

45/45

33/33

140/140

104B

7.9/10.5

21.9/25.3

34/39

40/40

31/35

133/133

37/41

40/45

33/37

135/135

40/45

45/45

37/41

138/138

43/47

45/50

39/43

140/140

105A

12.0/16.0

33.4/38.5

49/55

50/60

44/50

133/133

51/57

60/60

47/52

135/135

55/61

60/70

50/56

138/138

57/63

60/70

52/58

140/140

104B+104B

15.8/21.0

43.8/50.5

62/70

70/70

56/64

133/133

64/72

70/80

59/66

135/135

68/76

70/80

62/70

138/138

70/78

70/80

64/72

140/140

104B+105A

19.9/26.5

55.2/63.8

76/87

80/90

69/79

133/133

78/89

80/90

72/82

135/135

82/93

90/100

75/85

138/138

84/95

90/100

77/87

140/140

MED

NONE

------

28/28

40/40

28/27

171

30/30

45/45

30/30

173

33/33

45/45

33/33

176

35/35

50/50

35/35

178

102A

4.9/6.5

13.6/15.6

28/28

40/40

28/27

171/171

30/31

45/45

30/30

173/173

33/34

45/45

33/33

176/176

35/37

50/50

35/35

178/178

104B

7.9/10.5

21.9/25.3

36/40

40/40

33/37

171/171

39/43

45/45

35/39

173/173

42/46

45/50

39/42

176/176

45/49

50/50

41/45

178/178

105A

12.0/16.0

33.4/38.5

51/57

60/60

46/52

171/171

53/59

60/60

49/54

173/173

57/63

60/70

52/58

176/176

59/65

60/70

54/60

178/178

104B+104B

15.8/21.0

43.8/50.5

64/72

70/80

58/66

171/171

66/74

70/80

60/68

173/173

70/78

70/80

64/71

176/176

72/80

80/80

66/73

178/178

104B+105A

19.9/26.5

55.2/63.8

78/89

80/90

71/81

171/171

80/91

90/100

74/83

173/173

84/95

90/100

77/87

176/176

86/97

90/100

79/89

178/178

HIGH

NONE

------

30/30

45/40

29/29

186

32/32

45/45

32/31

188

35/35

45/45

35/35

191

37/36

50/50

37/37

193

102A

4.9/6.5

13.6/15.6

30/30

45/40

29/29

186/186

32/33

45/45

32/31

188/188

35/36

45/45

35/35

191/191

37/39

50/50

37/37

193/193

104B

7.9/10.5

21.9/25.3

38/42

45/45

35/39

186/186

41/45

45/45

37/41

188/188

44/48

45/50

40/44

191/191

47/51

50/60

43/46

193/193

105A

12.0/16.0

33.4/38.5

53/59

60/60

48/54

186/186

55/61

60/70

50/56

188/188

59/65

60/70

54/59

191/191

61/67

70/70

56/62

193/193

104B+104B

15.8/21.0

43.8/50.5

66/74

70/80

60/68

186/186

68/76

70/80

62/70

188/188

72/80

80/80

66/73

191/191

74/82

80/90

68/75

193/193

104B+105A

19.9/26.5

55.2/63.8

80/91

80/100

73/83

186/186

82/93

90/100

75/85

188/188

86/97

90/100

79/88

191/191

88/99

90/100

81/91

193/193

See“LegendandNotesforTable10onpage50.

48HC

50TC

47

Tabl

e10

--U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont)

UNIT

NOM.V---Ph---HZ

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER***A00

Nom(kW)

FLA

NOP.E.

w/P.E.(pwrdfr/unit)

NOP.E.

w/P.E.(pwrdfr/unit)

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

50TC**06 50TC**06

460---3---60

STD

NONE

------

1320

1363

1420

1464

1620

1565

1720

1666

106A

6.0

7.2

1320

1363

1420

1464

1620

1565

1720

1666

108A

11.5

13.8

2125

1963

2225

2064

2425

2165

2525

2366

109A

14.0

16.8

2525

2263

2630

2364

2730

2565

2930

2666

108A+108A

23.0

27.7

3840

3563

4040

3664

4145

3765

4245

3966

108A+109A

25.5

30.7

4245

3863

4345

3964

4545

4165

4650

4266

MED

NONE

------

1420

1482

1520

1583

1620

1684

1720

1785

106A

6.0

7.2

1420

1482

1520

1583

1620

1684

1820

1785

108A

11.5

13.8

2225

2082

2325

2183

2525

2284

2630

2385

109A

14.0

16.8

2630

2382

2730

2483

2830

2684

3030

2785

108A+108A

23.0

27.7

3940

3682

4145

3783

4245

3884

4345

3985

108A+109A

25.5

30.7

4345

3982

4445

4083

4650

4284

4750

4385

HIGH

NONE

------

1520

1590

1620

1691

1720

1792

1825

1893

106A

6.0

7.2

1520

1590

1620

1691

1720

1792

1925

1893

108A

11.5

13.8

2325

2190

2425

2291

2630

2392

2730

2493

109A

14.0

16.8

2730

2490

2830

2591

2930

2792

3135

2893

108A+108A

23.0

27.7

4040

3790

4245

3891

4345

3992

4445

4093

108A+109A

25.5

30.7

4445

4090

4545

4191

4750

4392

4850

4493

575---3---60

STD

NONE

------

1115

1048

1315

1250

1215

1250

1420

1452

MED

NONE

------

1015

1052

1215

1254

1215

1254

1415

1456

HIGH

NONE

------

1115

1163

1315

1365

1315

1365

1520

1567

See“LegendandNotesforTable10onpage50.

48HC

50TC

48

Tabl

e10

--U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont)

UNIT

NOM.V---Ph---HZ

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER***A00

Nom(kW)

FLA

NOP.E.

w/P.E.(pwrdfr/unit)

NOP.E.

w/P.E.(pwrdfr/unit)

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

50TC**07---Unitsproducedonorafter02/09/2015

208/230---3---60

STD

NONE

------

33/33

50/50

32/32

197

35/35

50/50

34/34

199

38/38

50/50

38/37

202

40/40

50/50

40/40

204

102A

4.9/6.5

13.6/15.6

33/33

50/50

32/32

197/197

35/35

50/50

34/34

199/199

38/38

50/50

38/37

202/202

40/40

50/50

40/40

204/204

104B

7.9/10.5

21.9/25.3

36/40

50/50

33/37

197/197

39/43

50/50

35/39

199/199

42/46

50/50

39/42

202/202

45/49

50/50

41/45

204/204

105A

12.0/16.0

33.4/38.5

51/57

60/60

46/52

197/197

53/59

60/60

49/54

199/199

57/63

60/70

52/58

202/202

59/65

60/70

54/60

204/204

104B+104B

15.8/21.0

43.8/50.5

64/72

70/80

58/66

197/197

66/74

70/80

60/68

199/199

70/78

70/80

64/71

202/202

72/80

80/80

66/73

204/204

104B+105A

19.9/26.5

55.2/63.8

78/89

80/90

71/81

197/197

80/91

90/100

74/83

199/199

84/95

90/100

77/87

202/202

86/97

90/100

79/89

204/204

MED

NONE

------

35/35

50/50

34/34

212

37/37

50/50

36/36

214

40/40

50/50

39/39

217

42/41

60/60

42/42

219

102A

4.9/6.5

13.6/15.6

35/35

50/50

34/34

212/212

37/37

50/50

36/36

214/214

40/40

50/50

39/39

217/217

42/41

60/60

42/42

219/219

104B

7.9/10.5

21.9/25.3

38/42

50/50

35/39

212/212

41/45

50/50

37/41

214/214

44/48

50/50

40/44

217/217

47/51

60/60

43/46

219/219

105A

12.0/16.0

33.4/38.5

53/59

60/60

48/54

212/212

55/61

60/70

50/56

214/214

59/65

60/70

54/59

217/217

61/67

70/70

56/62

219/219

104B+104B

15.8/21.0

43.8/50.5

66/74

70/80

60/68

212/212

68/76

70/80

62/70

214/214

72/80

80/80

66/73

217/217

74/82

80/90

68/75

219/219

104B+105A

19.9/26.5

55.2/63.8

80/91

80/100

73/83

212/212

82/93

90/100

75/85

214/214

86/97

90/100

79/88

217/217

88/99

90/100

81/91

219/219

HIGH

NONE

------

3750

36226

3950

39228

4260

42231

4460

44233

102A

4.9/6.5

13.6/15.6

37/37

50/50

36/36

226/226

39/39

50/50

39/39

228/228

42/42

60/60

42/42

231/231

44/44

60/60

44/44

233/233

104B

7.9/10.5

21.9/25.3

41/45

50/50

37/41

226/226

43/48

50/50

40/43

228/228

47/51

60/60

43/47

231/231

49/54

60/60

45/49

233/233

105A

12.0/16.0

33.4/38.5

55/62

60/70

51/56

226/226

58/64

60/70

53/59

228/228

61/68

70/70

56/62

231/231

64/70

70/70

58/64

233/233

104B+104B

15.8/21.0

43.8/50.5

68/77

70/80

63/70

226/226

71/79

80/80

65/72

228/228

74/83

80/90

68/76

231/231

77/85

80/90

70/78

233/233

104B+105A

19.9/26.5

55.2/63.8

83/93

90/100

76/86

226/226

85/96

90/100

78/88

228/228

89/99

90/100

81/91

231/231

91/102

100/110

83/93

233/233

460---3---60

STD

NONE

------

1520

1496

1620

1597

1720

1798

1825

1899

106A

6.0

7.2

1520

1496

1620

1597

1720

1798

1825

1899

108A

11.5

13.8

2225

2096

2325

2197

2525

2298

2630

2399

109A

14.0

16.8

2630

2396

2730

2497

2830

2698

3030

2799

108A+108A

23.0

27.7

3940

3696

4145

3797

4245

3898

4345

3999

108A+109A

25.5

30.7

4345

3996

4445

4097

4650

4298

4750

4399

MED

NONE

------

1620

15104

1720

16105

1825

18106

1925

19107

106A

6.0

7.2

1620

15104

1720

16105

1825

18106

1925

19107

108A

11.5

13.8

2325

21104

2425

22105

2630

23106

2730

24107

109A

14.0

16.8

2730

24104

2830

25105

2930

27106

3135

28107

108A+108A

23.0

27.7

4040

37104

4245

38105

4345

39106

4445

40107

108A+109A

25.5

30.7

4445

40104

4545

41105

4750

43106

4850

44107

HIGH

NONE

------

1720

16111

1825

18112

1925

19113

2025

20114

106A

6.0

7.2

1720

16111

1825

18112

1925

19113

2025

20114

108A

11.5

13.8

2425

22111

2630

23112

2730

24113

2830

26114

109A

14.0

16.8

2830

25111

2930

27112

3135

28113

3235

29114

108A+108A

23.0

27.7

4245

38111

4345

39112

4445

40113

4650

42114

108A+109A

25.5

30.7

4550

41111

4750

43112

4850

44113

4950

45114

575---3---60

STD

NONE

------

1115

1168

1315

1370

1315

1370

1520

1572

MED

NONE

------

1215

1279

1420

1481

1415

1381

1620

1683

HIGH

NONE

------

1215

1279

1420

1481

1415

1381

1620

1683

See“LegendandNotesforTable10onpage50.

48HC

50TC

49

Tabl

e10

--U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont)

UNIT

NOM.V---Ph---HZ

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER***A00

Nom(kW)

FLA

NOP.E.

w/P.E.(pwrdfr/unit)

NOP.E.

w/P.E.(pwrdfr/unit)

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

MCA

MAX

FUSEor

HACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

50TC**07---Unitsproducedonorpriorto02/08/2015

208/230---3---60

STD

NONE

------

33/32

50/50

32/31

184

35/34

50/50

34/33

186

37/37

50/50

37/37

189

39/39

50/50

39/39

191

102A

4.9/6.5

13.6/15.6

33/32

50/50

32/31

184/184

35/34

50/50

34/33

186/186

37/37

50/50

37/37

189/189

39/39

50/50

39/39

191/191

104B

7.9/10.5

21.9/25.3

36/40

50/50

33/37

184/184

39/43

50/50

35/39

186/186

42/46

50/50

39/42

189/189

45/49

50/50

41/45

191/191

105A

12.0/16.0

33.4/38.5

51/57

60/60

46/52

184/184

53/59

60/60

49/54

186/186

57/63

60/70

52/58

189/189

59/65

60/70

54/60

191/191

104B+104B

15.8/21.0

43.8/50.5

64/72

70/80

58/66

184/184

66/74

70/80

60/68

186/186

70/78

70/80

64/71

189/189

72/80

80/80

66/73

191/191

104B+105A

19.9/26.5

55.2/63.8

78/89

80/90

71/81

184/184

80/91

90/100

74/83

186/186

84/95

90/100

77/87

189/189

86/97

90/100

79/89

191/191

MED

NONE

------

34/34

50/50

33/33

199

36/36

50/50

35/35

201

39/39

50/50

39/39

204

41/41

50/50

41/41

206

102A

4.9/6.5

13.6/15.6

34/34

50/50

33/33

199/199

36/36

50/50

35/35

201/201

39/39

50/50

39/39

204/204

41/41

50/50

41/41

206/206

104B

7.9/10.5

21.9/25.3

38/42

50/50

35/39

199/199

41/45

50/50

37/41

201/201

44/48

50/50

40/44

204/204

47/51

50/60

43/46

206/206

105A

12.0/16.0

33.4/38.5

53/59

60/60

48/54

199/199

55/61

60/70

50/56

201/201

59/65

60/70

54/59

204/204

61/67

70/70

56/62

206/206

104B+104B

15.8/21.0

43.8/50.5

66/74

70/80

60/68

199/199

68/76

70/80

62/70

201/201

72/80

80/80

66/73

204/204

74/82

80/90

68/75

206/206

104B+105A

19.9/26.5

55.2/63.8

80/91

80/100

73/83

199/199

82/93

90/100

75/85

201/201

86/97

90/100

79/88

204/204

88/99

90/100

81/91

206/206

HIGH

NONE

------

3650

36213

3850

38215

4150

41218

4360

43220

102A

4.9/6.5

13.6/15.6

36/36

50/50

36/36

213/213

38/38

50/50

38/38

215/215

41/41

50/50

41/41

218/218

43/43

60/60

43/43

220/220

104B

7.9/10.5

21.9/25.3

41/45

50/50

37/41

213/213

43/48

50/50

40/43

215/215

47/51

50/60

43/47

218/218

49/54

60/60

45/49

220/220

105A

12.0/16.0

33.4/38.5

55/62

60/70

51/56

213/213

58/64

60/70

53/59

215/215

61/68

70/70

56/62

218/218

64/70

70/70

58/64

220/220

104B+104B

15.8/21.0

43.8/50.5

68/77

70/80

63/70

213/213

71/79

80/80

65/72

215/215

74/83

80/90

68/76

218/218

77/85

80/90

70/78

220/220

104B+105A

19.9/26.5

55.2/63.8

83/93

90/100

76/86

213/213

85/96

90/100

78/88

215/215

89/99

90/100

81/91

218/218

91/102

100/110

83/93

220/220

460---3---60

STD

NONE

------

1725

1692

1825

1793

1925

1994

2025

2095

106A

6.0

7.2

1725

1692

1825

1793

1925

1994

2025

2095

108A

11.5

13.8

2225

2092

2325

2193

2525

2294

2630

2395

109A

14.0

16.8

2630

2392

2730

2493

2830

2694

3030

2795

108A+108A

23.0

27.7

3940

3692

4145

3793

4245

3894

4345

3995

108A+109A

25.5

30.7

4345

3992

4445

4093

4650

4294

4750

4395

MED

NONE

------

1825

17100

1925

18101

2025

19102

2130

21103

106A

6.0

7.2

1825

17100

1925

18101

2025

19102

2130

21103

108A

11.5

13.8

2325

21100

2425

22101

2630

23102

2730

24103

109A

14.0

16.8

2730

24100

2830

25101

2930

27102

3135

28103

108A+108A

23.0

27.7

4040

37100

4245

38101

4345

39102

4445

40103

108A+109A

25.5

30.7

4445

40100

4545

41101

4750

43102

4850

44103

HIGH

NONE

------

1925

18107

2025

19108

2130

21109

2230

22110

106A

6.0

7.2

1925

18107

2025

19108

2130

21109

2230

22110

108A

11.5

13.8

2425

22107

2630

23108

2730

24109

2830

26110

109A

14.0

16.8

2830

25107

2930

27108

3135

28109

3235

29110

108A+108A

23.0

27.7

4245

38107

4345

39108

4445

40109

4650

42110

108A+109A

25.5

30.7

4550

41107

4750

43108

4850

44109

4950

45110

575---3---60

STD

NONE

------

1215

1263

1420

1465

1420

1365

1620

1667

MED

NONE

------

1320

1274

1520

1576

1520

1476

1720

1778

HIGH

NONE

------

1320

1274

1520

1576

1520

1476

1720

1778

See“LegendandNotesforTable10onpage50.

48HC

50TC

50

Legend and Notes for Table 10LEGEND:CO --- Convenient outletDISC --- DisconnectFLA --- Full load ampsIFM --- Indoor fan motorLRA --- Locked rotor ampsMCA --- Minimum circuit ampsMOCP --- Maximum over current protectionPE --- Power exhaustUNPWR CO --- Unpowered convenient outletNOTES:1. In compliance with NEC requirements for multimotor andcombination load equipment (refer to NEC Articles 430 and440), the overcurrent protective device for the unit shall befuse or HACR breaker. Canadian units may be fuse or circuitbreaker.

2. Unbalanced 3-Phase Supply VoltageNever operate a motor where a phase imbalance in supplyvoltage is greater than 2%. Use the following formula to de-termine the percentage of voltage imbalance.

% Voltage Imbalance = 100 xmax voltage deviation from average voltage

average voltage

Example: Supply voltage is 230-3-60

AB = 224 vBC = 231 vAC = 226 v

Average Voltage =(224 + 231 + 226)

=681

3 3

= 227

Determine maximum deviation from average voltage.(AB) 227 – 224 = 3 v(BC) 231 – 227 = 4 v(AC) 227 – 226 = 1 vMaximum deviation is 4 v.Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x4

227

= 1.76%

This amount of phase imbalance is satisfactory as it is below themaximum allowable 2%.IMPORTANT: If the supply voltage phase imbalance is more than2%, contact your local electric utility company immediately.

50TC

51

Economizer 2 Position Damper Unit Without Economizer or2 Position Damper

C08631

Fig. 75 -- EconoMi$ert IV Wiring

Step 11 — Adjust Factory--Installed Options

Smoke Detectors —

Smoke detector(s) will be connected at the ControlsConnections Board, at terminals marked “SmokeShutdown”. Remove jumper JMP 3 when ready toenergize unit.

EconoMi$er IV Occupancy Switch —

Refer to Fig. 75 for general EconoMi$er IV wiring.External occupancy control is managed through aconnection on the Central Terminal Board.

If external occupancy control is desired, connect a timeclock or remotely controlled switch (closed for Occupied,open for Unoccupied sequence) at terminals markedOCCUPANCY on CTB. Remove or cut jumper JMP 2 tocomplete the installation.

Step 12 — Install Accessories

Available accessories include:

Roof CurbThru--base connection kit (must be installed before unitis set on curb)Manual outside air damperTwo--Position motorized outside air damper

EconoMi$er IV (with control and integrated barometricrelief)EconoMi$er2 (without control/for external signal andintegrated barometric relief)Power ExhaustDifferential dry--bulb sensor (EconoMi$er IV)Outdoor enthalpy sensorDifferential enthalpy sensorElectric HeatersSingle Point kitsLow Ambient ControlsThermostat / SensorsCO2 sensorDDC interface (PremierLink)Louvered hail guardPhase monitor control

Refer to separate installation instructions for informationon installing these accessories.

Pre--Start and Start--Up

This completes the mechanical installation of the unit.Refer to the unit’s Service Manual for detailed Pre--Startand Start--up instructions.

50TC

52

50TC

53

50TC

54

Copyright 2015 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Edition Date: 03/15

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: 50TC---4---7---02SI

Replaces: 50TC---4---7---01SI

50TC

55

UNIT START-UP CHECKLIST(Remove and Store in Job File)

MODEL NO.: SERIAL NO.:

I. PRE-START-UP

j VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT

j VERIFY INSTALLATION OF OUTDOOR AIR HOOD

j VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD

j VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS

j VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

j CHECK THAT INDOOR--AIR FILTERS ARE CLEAN AND IN PLACE

j CHECK THAT OUTDOOR AIR INLET SCREENS ARE IN PLACE

j VERIFY THAT UNIT IS LEVEL

j CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND VERIFYSETSCREW IS TIGHT

j VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

j VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRRECT DIRECTION

j VERIFY INSTALLATION OF THERMOSTAT

II. START-UPELECTRICAL

SUPPLY VOLTAGE L1--L2 L2--L3 L3--L1

COMPRESSOR AMPS 1 L1 L2 L3

COMPRESSOR AMPS 2 L1 L2 L3

SUPPLY FAN AMPS L1 L2 L3

TEMPERATURES

OUTDOOR--AIR TEMPERATURE _F DB (DRY BULB)

RETURN--AIR TEMPERATURE _F DB _F WB (WET BULB)

COOLING SUPPLY AIR TEMPERATURE _F

PRESSURES

REFRIGERANT SUCTION CIRCUIT A PSIG

CIRCUIT B PSIG

REFRIGERANT DISCHARGE CIRCUIT A PSIG

CIRCUIT B PSIG

j VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

GENERAL

j ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS (IF EQUIPPED)

j VERIFY SMOKE DETECTOR UNIT SHUTDOWN BY UTILIZING MAGNET TEST

50TC

56

III. HUMIDIMIZER START-UP (50TC--B07 ONLY)STEPS

j 1. CHECK CTB FOR JUMPER 5, 6, 7JUMPER 5, 6, 7 MUST BE CUT AND OPEN

j 2. OPEN HUMIDISTAT CONTACTS

j 3. START UNIT IN COOLING (CLOSE Y1)OBSERVE AND RECORD

A. SUCTION PRESSURE PSIG

B. DISCHARGE PRESSURE PSIG

C. ENTERING AIR TEMPERATURE _F

D. LIQUID LINE TEMPERATUREAT OUTLET OR REHEAT COIL _F

E. CONFRIM CORRECT ROTATION FOR COMPRESSOR

F. CHECK FOR CORRECT RAMP--UP OF OJUTDOOR FAN MOTOR AS CONDENSER COIL WARMS

j 4. CHECK UNIT CHARGE PER CHARGING CHART

j 5. SWITCH UNIT TO HIGH--LATENT MODE (SUBCOOLER) BY CLOSING HUMIDISTAT WITH Y1 CLOSED

OBSERVE

j A. REDUCTION IN SUCTION PRESSURE (5 TO 7 PSI EXPECTED)

j B. DISCHARGE PRESSURE UNCHANGED

j C. LIQUID TEMPERATURE DROPS TO 50 TO 55_F RANGE

j D. LSV SOLENOID ENGERIZED (VALVE CLOSES)

j 6. SWITCH UNIT TO DEHUMID (REHEAT) BY OPENING Y1

OBSERVE

j A. SUCTION PRESSURE INCREASES TO NORMAL COOLING LEVEL

j B. DISCHARGE PRESSURE DECREASES (35 TO 50 PSI)

j C. LIQUID TEMPERATURE RETURNS TO NORMAL COOLNG LEVEL

j D. LSV SOLENOID ENERGIZED (VALVE CLOSES)

j E. DSV SOLENOID ENERGIZED, VALVE OPENS

j 7. WITH UNIT IN DEHUMID MODE CLOSE W1COMPRESSOR AND OUTDOOR FAN STOP; LSV AND DSV SOLENOIDS DE--ENERGIZED

j 8. OPEN W1 RESTORE UNIT TO DEHUMID MODE

j 9. OPEN HUMIDISTAT INPUTCOMPRESSOR AND OUTDOOR FAN STOP; LSV AND DSV SOLENOIDS DE--ENERGIZED

j 10. RESTORE SETPOINTS FOR THERMOSTAT AND HUMIDISTAT

Copyright 2015 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Edition Date: 03/15

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: 50TC---4---7---02SI

Replaces: 50TC---4---7---01SI

50TC

517