iom_030

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50TJ016-032S Single-Package Rooftop Units

Electric Cooling with Electric Heat Option

Installation, Start-Up and Service Instructions

CONTENTS Page SAFETY CONSIDERATIONS…………….……… INSTALLATION …………………………………... Step 1 — Rig and Place Unit…………………… • POSITIONING • ROOF MOUNT Step 2 — Field Fabricate Ductwork……………. Step 3 — Make Unit Duct Connections .……… Step 4 — Trap Condensate Drain……………… Step 5 — Make Electrical Connections………. • FIELD POWER SUPPLY • FIELD CONTROL WIRING • NON-FUSED DISCONNECT Step 6 — Make Outdoor-Air Inlet………………. • MANUAL OUTDOOR-AIR VENT. START-UP …………………………………………. SERVICE . . . . . . . . . . . . . . . ………………. . . . . . . TROUBLESHOOTING. . . . . . . . . ………………. . START-UP CHECKLIST

1 2 2

6 6 6 6

9

9 16 24

SAFETY CONSIDERATIONS Installation and servicing air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air conditioning equipment. Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service personnel When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply. Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for un-brazing operations. Have fire extinguishers available for all brazing operations.

WARNING Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury.

IMPORTANT: Units have high ambient operating limits. If limits are exceeded, the unit will automatically lock the compressor out of operation. Manual reset will be required to restart the compressor.

Form 50TJSD-04 IOM

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INSTALLATION Step 1 — Rig and Place Unit — Inspect unit for transportation damage. File any claim with transportation agency. Keep unit upright, and do not drop. Use spreader bars over unit to prevent sling or cable damage. Rollers may be used to move unit across a roof Level by using unit frame as a reference; leveling tolerance is± 1/16 in. per linear ft in any direction. See Fig. 1 for additional information. Unit weight is shown in Table 1. Four lifting holes are provided in ends of unit base rails as shown in Fig. 1. Refer to rigging instructions on unit. POSITIONING — Provide clearance around and above unit for airflow, safety, and service access. Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contaminated air. Although unit is weatherproof, guard against water from higher level runoff and overhangs. ROOF MOUNT — Check building codes for weight distribution requirements. Table. 1 – Unit Weights & Dimensions.

NOTES: 1. Dimensions in ( ) are in millimeters. 2. Remove boards at ends of unit and runners prior to rigging. 3. Rig by inserting hooks into unit base rails as shown. Use corner post from packaging to protect coil from damage. Use bumper boards for spreader bars. 4. Weights given are for aluminum evaporator and condenser coil plate fins.

CAUTION All panels must be in place when rigging.

Fig. 1 — Rigging Details

DIMENSIONS MAXIMUM SHIPPING WEIGHT A B UNIT 5OTJ Lb Kg in. mm in. mm

016 1628 723 91-1/4 2318 41 1041 020 1733 786 91-1/4 2318 40 1016 024 1874 850 96.0 2440 39 991 028 2035 923 96.0 2440 38 965 032 2205 1000 102-23/64 2600 41 1041

IMPORTANT: All units are internally isolated against vibration. If extra isolation required, please see dimensional drawing (page- 3) for corner weights.

Fig.2- Base Unit Dimension, 50TJ16-032

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Table 2 – Physical Data (60 Hz)

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UNIT 50TJ 016 020 024 028 032 NOMINAL CAPACITY (tons) 15 18 20 25 28 1/2 OPERATING WEIGHT For Operating Weights see page 3.

Scroll COMPRESSOR Quantity...Danfoss Model (Ckt 1 , Ckt 2) Number of Refrigerant Circuits Oil (oz) (Ckt 1 , Ckt 2) Stages of Capacity Control (%)

2... SM100S

2

81, 81 50/50

1..SM110S, 1..SM100S

2

106,81 55/45

1...SM120S, 1..SM110S

2

106, 106 55/45

1..SM161T, 1...SM120S

2

136, 106 60/40

2..SM161T,

2 136, 136

50/50 R-22 TXV

REFRIGERANT TYPE Expansion Device Operating Charge (lb-oz) Circuit 1* Circuit 2

12-8 12-8

17-0 14-0

20-8 14-0

24-0 16-0

24-0 24-0

Grooved 3/8-in. Copper Tubes, Aluminium Wavy, Aluminium Pre-Coated, or Copper Plate Fins

CONDENSER COIL Rows...Fins/in. Total Face Area (sq ft)

2...16 24.43

3...16 24.43

3..16 27.44

4...16 27.44

4...16 30.00

Propeller Type CONDENSER FAN Nominal Cfm Quantity...Diameter (in.), No. of Blades. Motor Hp...Rpm

14,200 2...30…4 1…1140

15,000 2...30…4 1…1140

Grooved 3/8-in. Copper Tubes, LSW or Copper Plate Fins, Face Split

EVAPORATOR COIL Rows...Fins/in. Total Face Area (sq ft)

2...17 18.4

3...17 18.4

3...17 21

4...17 21

4...17 23.3

Centrifugal Type EVAPORATOR FAN Quantity...Size (in.) Type Drive Nominal Cfm Motor Hp Motor Nominal Rpm Maximum Continuous Bhp Motor Frame Size Fan Rpm Range Fan Pulley Pitch Diameter (in.) Nominal Fan Shaft Diameter (in.) Motor Bearing Type Maximum Allowable Rpm Motor Pulley Pitch Diameter Min/Max (in.) Nominal Motor Shaft Diameter (in.) Belt, Quantity...Type...Length (in.) Pulley Center Line Distance (in.) Speed Change per Full Turn of Movable Pulley Flange (rpm) Movable Pulley Maximum Full Turns From Closed Position Factory Speed Setting Factory Speed Setting (rpm)

1...16 x 16 Belt 6000

5 1745 5.5

184T 690-840

11.0 1.19 Ball

1200 4.3/5.2

11/8

2... SPA 1900 23.8-25

30 5

21/2 765

1...16 x 16 Belt 6300

5 1745 5.5

184T 765-920

10.0 1.19 Ball

1200 4.3/5.2

11/8

2... SPA 1900 23.8-25

30 5

21/2 840

1...18 x 18 Belt 8000 7.5

1745 8.2

213T 710-810

11.0 1.38 Ball 1400

4.5/5.0

13/8 2... SPB 2060

23.8-25 20

5

21/2 760

1...18 x 18 Belt 8700 7.5

1745 8.2

213T 810-910

11.0 1.38 Ball 1400

5.2/5.75

13/8 2... SPB 2060

23.8-25 20

5

21/2 860

1...18 x 18 Belt

10,500 10

1745 11

215T 850-1080

11.0 1.38 Ball 1400

5.4/6.8

13/8 2... SPB 2000

23.8-25 50

5

21/2 975

HIGH-PRESSURE SWITCH (psig) Cut-out Reset (Auto)

426 320

LOW-PRESSURE SWITCH (psig) Cut-out Reset (Auto)

27 44

FREEZE PROTECTION THERMOSTAT (F) Opens Closes

30 ± 5 45 ± 5

RETURN-AIR FILTERS Quantity...Size (in.)

Aluminium 4…...(31.5’’ x 21.5’’)

Aluminium 4..(36.5’’ x 21.5’’)

Condenser Motor Efficiency 80% Evaporator Motor Efficiency 87%

Table 3– Physical Data (50 Hz)

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UNIT 50TJ 016 020 024 028 032 NOMINAL CAPACITY (tons) 15 18 20 25 28 1/2 OPERATING WEIGHT For Operating Weights see page 3.

Scroll COMPRESSOR Quantity...Danfoss Model (Ckt 1 , Ckt 2) Number of Refrigerant Circuits Oil (oz) (Ckt 1 , Ckt 2) Stages of Capacity Control (%)

2...SM110S

2 106, 106

50/50

1..SM120S, 1..SM110S

2

106,106 55/45

1...SM161T, 1..SM120S

2

136, 106 60/40

1..SM185W, 1...SM161T

2

136, 136 55/45

2..SM185W,

2

136, 136 50/50

R-22 TXV

REFRIGERANT TYPE Expansion Device Operating Charge (lb-oz) Circuit 1* Circuit 2

14-0 14-0

17-8 14-8

23-0 14-8

25-0 17-0

25-0 25-0

Grooved 3/8-in. Copper Tubes, Aluminium Wavy, Aluminium Pre-Coated, or Copper Plate Fins

CONDENSER COIL Rows...Fins/in. Total Face Area (sq ft)

2...16 24.43

3...16 24.43

3...16 27.44

4...16 27.44

4...16 30.00

Propeller Type CONDENSER FAN Nominal Cfm Quantity...Diameter (in.)…No. of Blades. Motor Hp...Rpm

12,800 2...30…4 1…950

14,500 2...30…6 1…950

Grooved 3/8-in. Copper Tubes, LSW or Copper Plate Fins, Face Split

EVAPORATOR COIL Rows...Fins/in. Total Face Area (sq ft)

2...17 18.4

3...17 18.4

3...17 21

4...17 21

4...17 23.3

Centrifugal Type EVAPORATOR FAN Quantity...Size (in.) Type Drive Nominal Cfm Motor Hp Motor Nominal Rpm Maximum Continuous Bhp Motor Frame Size Fan Rpm Range Fan Pulley Pitch Diameter (in.) Nominal Fan Shaft Diameter (in.) Motor Bearing Type Maximum Allowable Rpm Motor Pulley Pitch Diameter Min/Max (in.) Nominal Motor Shaft Diameter (in.) Belt, Quantity...Type...Length (in.) Pulley Center Line Distance (in.) Speed Change per Full Turn of Movable Pulley Flange (rpm) Movable Pulley Maximum Full Turns From Closed Position Factory Speed Setting Factory Speed Setting (rpm)

1...16 x 16 Belt 6000

5 1435 5.5

184T 690-840

8 7/8 1.19 Ball 1200

4.3/5.2

11/8 2... SPA 1800

23.8-25 30

5

21/2 765

1...16 x 16 Belt 6300

5 1435 5.5

184T 765-920

7 7/8 1.19 Ball

1200 4.3/5.2

11/8

2... SPA 1800 23.8-25

30 5

21/2 840

1...18 x 18 Belt 8000 7.5

1435 8.2

213T 710-810

9 5/17 1.38 Ball

1400 4.5/5.0

13/8

2... SPB 2000 23.8-25

20

5

21/2 760

1...18 x 18 Belt 8700 7.5

1435 8.2

213T 810-910

9 5/17 1.38 Ball

1400 5.2/5.75

13/8

2... SPB 2000 23.8-25

20

5

21/2 860

1...18 x 18 Belt

10,500 10

1435 11

215T 830-1050

9 5/17 1.38 Ball

1400 5.4/6.8

13/8

2... SPB 1950 23.8-25

50 5

21/2 955

HIGH-PRESSURE SWITCH (psig) Cut-out Reset (Auto)

426 320

LOW-PRESSURE SWITCH (psig) Cut-out Reset (Auto)

27 44

FREEZE PROTECTION THERMOSTAT (F) Opens Closes

30 ± 5 45 ± 5

RETURN-AIR FILTERS Quantity...Size (in.)

Aluminium 4…...(31.5’’ x 21.5’’)

Aluminium 4..(36.5’’ x 21.5’’)

Condenser Motor Efficiency 80% Evaporator Motor Efficiency 87%

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Step 2 — Field Fabricate Ductwork — Secure all ducts to building structure. Use flexible duct connectors between unit and ducts as required(a space for 2.5 to 3 ft is required in case of repairing or replacing the blower wheel). Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes. Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier. The 50TJ units with electric heat require a 2-in. clearance for the first 24 in. of ductwork. Outlet grilles must not lie directly below unit discharge. NOTE: A 90-degree elbow must be provided in the ductwork to comply with UL (Underwriters’ Laboratories) codes for use with electric heat. Step 3 — Make Unit Duct Connections — Unit is shipped for side duct connections. Ductwork openings are shown in Fig. 6. Step 4 — Trap Condensate Drain — See Fig. 3 and 6 for drain location. Plug is provided in drain hole and must be removed when unit is operating. One 3/4-in. half coupling is provided inside unit evaporator section for condensate drain connection. An 81/2 in. x 3/4-in. diameter nipple and a 2-in. x 3/4-in. diameter pipe nipple are coupled to standard 3/4-in. diameter elbows to provide a straight path down through holes in unit base rails (see Fig. 2). A trap at least 4-in. deep must be used.

Fig. 3 – Condensate Drain Details Step 5 — Make Electrical Connections FIELD POWER SUPPLY — Unit is factory wired for voltage shown on nameplate. When installing units, provide a disconnect, per NEC (National Electrical Code) requirements, of adequate size (Table 4). All field wiring must comply with NEC and local requirements. Route power lines through control box access panel or unit base-pan to connections as shown on unit wiring diagram and Fig. 4. Operating voltage to compressor must be within voltage range indicated on unit nameplate. On 3-phase units, voltages between phases must be balanced within 2% and the current must be balanced within 10%.

CAUTION The correct power phasing is critical in the operation of the scroll compressors. An incorrect phasing will cause the compressor to rotate in the wrong direction. This may lead to premature compressor failure. Use the following formula to determine the percentage of voltage imbalance. Percentage of Voltage Imbalance

max voltage deviation from average voltage =100x average voltage EXAMPLE: Supply voltage is 460-3-60. AB = 452 v BC = 464 v AC = 455 v

455+464+455 Average Voltage = 3

1371 = 3

=457 Determine maximum deviation from average (AB) 457 – 452 = 5 v (BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v Maximum deviation is 7 v. Determine percent voltage imbalance:

7 Percentage of Voltage Imbalance = 100 x 457 =1.53 % This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%. IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately. Unit failure as a result of operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. FIELD CONTROL WIRING — Install a Carrier-approved accessory thermostat assembly according to the installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature. Route thermostat cable or equivalent single leads of no. 18 AWG (American Wire Gage) colored wire from subbase terminals through conduit in unit to low-voltage conn-ections as shown on unit label wiring diagram and in Fig. 5. NOTE: For wire runs up to 50 ft, use no. 18 AWG insulated wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG insulated wire (35 C minimum). For over 75 ft, use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected to

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the thermostat and will require a junction box and splice at the thermostat. Set heat anticipator settings as indicated in Table 7. Settings may be changed slightly to provide a greater degree of comfort for a particular installation.

Table 4 - TB1 MAXIMUM WIRE SIZE VOLTAGE UNIT 50TJ 208/230, 380 400

ALL 350 kcmil 2/0 LEGEND EQUIP — Equipment GND — Ground kcmil — Thousand Circular Mils NEC — National Electrical Code TB — Terminal Block

Fig.6 – Air Distribution (50TJ016 – 032)

Fig. 4 — Field Power Wiring Connections

Fig.5 – Field Control Thermostat Wiring

EXAMPLE: Supply voltage is 460-3-60. AB = 452 v BC = 464 v AC = 455 v

452 + 464 + 455 Average Voltage= 3

1371 =

3 = 457 Determine maximum deviation from average voltage. (AB) 457 – 452 = 5 v (BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v Maximum deviation is 7 v. Determine percent voltage imbalance.

7 % Voltage Imbalance = 100 x 457 = 1.53% This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%. 3. MCA calculation for 50TJ016-032units with electric heaters over 50 kW = (1.25 x IFM amps) + (1.00 x heater FLA)..

IMPORTANT: If the supply voltage phase imbalance is more than 2% contact your local electric Utility company

LEGEND AND NOTES FOR ELECTRICAL DATA TABLES. LEGEND FLA — Full Load Amps HACR — Heating, Air Conditioning and Refrigeration IFM — Indoor (Evaporator) Fan Motor LRA — Locked Rotor Amps MCA — Minimum Circuit Amps MOCP— Maximum Overcurrent Protection NEC — National Electrical Code OFM — Outdoor (Condenser) Fan Motor RLA — Rated Load Amps *Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 380 v, 480 v, and 600 v. Heaters are rated at 240 v, 480 v, or 600 v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly. To determine heater capacity at actual unit voltage, multiply 240 v, 480 v, or 600 v capacity by multipliers found in table on page 4 Product Data. †Fuse or HACR circuit breaker. NOTES: 1. In compliance with NEC requirements for multi-motor and combination load equipment (refer to NEC Articles 430 and 440), the over current protective device for the unit shall be fuse or HACR breaker. The Canadian units may be fuse or circuit breaker. 2. Unbalanced 3-Phase Supply Voltage Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percent of voltage imbalance. % Voltage Imbalance

maximum deviation from average voltage = 100 x average voltage

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Table 5-Electrical data – 50TJ016-032 COMPRESSOR NOMINAL

VOLTAGE VOLTAGE

RANGE NO. 1 NO. 2 OFM IFM ELECTRIC HEAT* POWER

SUPPLY UNIT

(3PH) (Hz) Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA TOTAL kW FLA/STAGE STAGES MCA MOCP†

16 230 380 460 400

60 60 60 50

187 342 414 360

253 418 508 440

28.8 15

14.7 15.5

195 123 95

111

28.8 15

14.7 15.5

195 123 95 11

2 2 2 2

1 1 1 1

6.6 3.9 3.3 3.4

5 5 5 5

12.87.7 6.4 7.6

27.5 18.6 27.6 21

34.6 14.3 17.2 15

2 2 2 2

91 50 47 50

110 60 60 60

20 230 380 460 400

60 60 60 50

187 342 414 360

253 418 508 440

30.1 15.3 15.5 19.6

225 140 114 125

28.8 15

14.7 15.5

195 123 95

111

2 2 2 2

1 1 1 1

6.6 3.9 3.3 3.4

5 5 5 5

12.87.7 6.4 7.6

27.5 18.6 27.6 21

34.6 14.3 17.2 15

2 2 2 2

94 50 48 54

110 60 60 70

24 230 380 460 400

60 60 60 50

187 342 414 360

253 418 508 440

37.8 21.2 17.2 25

239 145 125 167

30.1 15.3 15.5 19.6

225 140 114 125

2 2 2 2

1 1 1 1

6.6 3.9 3.3 3.4

7.5 7.5 7.5 7.5

19.411.79.7

11.4

36.7 24.8 36.8 28

47 19 23 20

2 2 2 2

110 62 54 69

130 75 70 85

28 230 380 460 400

60 60 60 50

187 342 414 360

253 418 508 440

41 21.8 21.8 27.2

350 151 158 198

37.8 21.2 17.2 25

239 145 125 167

2 2 2 2

1 1 1 1

6.6 3.9 3.3 3.4

7.5 7.5 7.5 7.5

19.411.79.7

11.4

36.7 24.8 36.8 28

47 19 23 20

2 2 2 2

123 69 61 77

150 80 75 95

032 230 380 460 400

60 60 60 50

187 342 414 360

253 418 508 440

41 21.8 21.8 27.2

350 151 158 198

41 21.8 21.8 27.2

350 151 158 198

2 2 2 2

1 1 1 1

6.6 3.9 3.3 3.4

10 10 10 10

26.816.213.416.1

36.7 24.8 36.8 28

47 19 23 20

2 2 2 2

128 74 70 85

150 90 85

100

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NON-FUSED DISCONNECT — On units with the optional non-fused disconnect, incoming power will be wired into the disconnect switch. Refer to Fig. 7 for wiring for 100 and 200 amp disconnect switches. Units with an MOCP under 100 will use the 100 amp disconnect switch.

Units with an MOCP over 100 will use the 200 amp disconnect switch. Refer to the applicable disconnect wiring diagram. NOTE: The disconnect takes the place of TB-1 as shown on the unit wiring diagram label and the component arrangement label. Fig. 7 — Optional Non-Fused Disconnect Wiring Step 6 — Outdoor-Air Inlet MANUAL OUTDOOR-SIDE VENT. — All units have a manual outdoor-Side Vent. to provide ventilation air. Side Vent. can admit up to 10% outdoor air into return-air compartment. UNIT 50TJ UNIT

VOLTAGE kW* STAGE 1 STAGE 2

208 23 0.5 0.5 016 , 020 230 30 0.5 0.5 208 30 0.5 0.5 024 , 032 230 40 0.5 0.5

Table 6 – Heat Anticipator Setting. START-UP Use the following information and Start-Up Checklist on page CL-1 to check out unit PRIOR to start-up. Unit Preparation — Check that unit has been installed in accordance with these installation instructions and all applicable codes.

Internal Wiring — Check all electrical connections in unit control boxes; tighten as required.

Compressor Mounting — Compressors are internally spring mounted. Do not loosen or remove compressor hold down bolts. Refrigerant Service Ports — Each refrigerant system has a total of 3 Schrader-type service gage ports. One port is located on the suction line, one on the compressor discharge line, and one on the liquid line. In addition Schrader-type valves are located underneath the low-pressure switches. Be sure that caps on the ports are tight. Compressor Rotation — It is important to be certain the compressors are rotating in the proper direction. To determine whether or not compressors are rotating in the proper direction: 1. Connect service gages to suction and discharge pressure fittings. 2. Energize the compressor. 3. The suction pressure should drop and the discharge pressure should rise, as is normal on any start-up. If the suction pressure does not drop and the discharge pressure does not rise to normal levels: 1. Note that the evaporator fan is probably also rotating in the wrong direction. 2. Turn off power to the unit. 3. Reverse any two of the incoming power leads. 4. Turn on power to the compressor. The suction and discharge pressure levels should now move to their normal start-up levels. NOTE: When compressors are rotating in the wrong direction, the unit will have increased noise levels and will not provide heating and cooling. After a few minutes of reverse operation, the scroll compressor internal overload protection will open, which will activate the unit’s lockout and requires a manual reset. Reset is accomplished by turning the thermostat on and off. Evaporator Fan — Fan belt and variable pulleys are factory installed. Remove tape from the fan pulley. See Table 7 for Air Quantity Limits. See Tables 8-12 for Fan Performance data. Be sure that fans rotate in the proper direction. See Table 13 for fan rpm at various fan motor pulley settings. To alter fan performance, see Evaporator-Fan Performance Adjustment section, page 17. IMPORTANT: Seal all in and out of Electrical Box to Prevent Moist Air from entering

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Table 7 — Air Quantity Limits

Condenser Fans and Motors — Fans and motors are factory set. Refer to Condenser-Fan Adjustment section (page 17) as required. Return-Air Filters — Check that correct filters are installed in filter tracks. See Table 2, 3. Do not operate unit without return-air filters.

016 4800 / 2265 7,500 / 3539

020 5500 / 2596 7,600 / 3586

024 6000 / 2831 10,000 / 4719

028 6500 / 3067 10,700 / 5049

032 8500 / 4011 12,500 / 5899

Fig.8 - 10% Fresh Outdoor-Air Option.

UNIT 50TJ MINIMUM CFM / L/s MAXIMUM CFM / L/s

Performance data (cont) Table 8-FAN PERFORMANCE — 50TJ016 UNIT — ENGLISH

50TJ016 AVAILABLE EXTERNAL STATIC PRESSURE(iwg)

0.2 0.4 0.6 0.8 1 AIR

FLOW (CFM) RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts 4800 682 1.6 1300 736 1.8 1467 789 2.0 1644 5100 705 1.8 1500 757 2.0 1678 807 2.2 1856 5400 728 2.1 1711 777 2.3 1889 825 2.2 1856 5700 704 2.1 1767 752 2.3 1944 799 2.6 2144 845 2.8 2333 6000 686 2.2 1833 732 2.4 2022 778 2.7 2211 823 2.9 2411 867 3.2 2611 6300 715 2.5 2100 759 2.8 2289 803 3.0 2500 846 3.3 2700 888 3.5 2911 6600 745 2.9 2389 788 3.1 2600 830 3.4 2811 871 3.7 3022 911 3.9 3244 6900 774 3.3 2711 815 3.5 2922 856 3.8 3144 895 4.1 3367 934 4.3 3600 7200 805 3.7 3056 844 4.0 3289 883 4.2 3511 921 4.5 3744 958 4.8 3978 7500 836 4.2 3444 874 4.1 3368 911 4.7 3911 948 5.0 4156

50TJ016

AVAILABLE EXTERNAL STATIC PRESSURE(iwg) 1.2 1.4 1.6

AIR FLOW (CFM) RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts 4800 840 2.2 1822 889 2.4 2011 937 2.7 2200 5100 856 2.5 2044 903 2.7 2233 949 2.9 2422 5400 872 2.8 2278 917 3.0 2467 962 3.2 2678 5700 890 3.1 2533 934 3.3 2744 6000 910 3.4 2822 952 3.7 3033 6300 930 3.8 3133 6600 951 4.2 3467

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LEGEND Bhp — Brake Horsepower FIOP — Factory-Installed Option Watts — Input Watts to Motor Normal face: refers to the Standard Motor & Drive Package. Bold-Italic face: requires a field supplied drive package. NOTES: 1. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm. 2. Static pressure losses must be added to external static pressure before entering Fan Performance table.

3. Interpolation is permissible. Do not extrapolate. 4. Fan performance is based on wet coils, clean filters, and casing losses. 5. Extensive motor and drive testing on these units ensures that the full horsepower and watts range of the motor can be utilized with confidence. Using your fan motors up to the watts or bhp rating shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. 6. Use of a field-supplied motor may affect wiring size. Contact your Carrier representative for details 7. Evaporator Motor Efficiency 87%.

Table 9-FAN PERFORMANCE — 50TJ020 UNIT — ENGLISH 50TJ020

0.2 0.4 0.6 0.8 1 AIR

FLOW (CFM) RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts

5500 780 2.4 1956 827 2.6 2144 874 2.8 2344 5800 807 2.7 2233 852 2.9 2422 896 3.2 2633 6100 791 2.8 2322 835 3.1 2533 878 3.3 2733 921 3.6 2944 6400 779 3.0 2444 822 3.2 2644 864 3.4 2856 906 3.7 3078 947 4.0 3289 6700 811 3.4 2778 852 3.6 2989 892 3.9 3211 932 4.1 3433 972 4.4 3667 7000 844 3.8 3144 883 4.1 3367 922 4.3 3600 960 4.6 3833 998 4.9 4067 7300 877 4.3 3556 915 4.6 3789 952 4.9 4022 989 5.2 4267 7600 872 4.5 3744 946 5.1 4222 982 5.4 4467

50TJ020

AVAILABLE EXTERNAL STATIC PRESSURE(iwg) 1.2 1.4

AIR FLOW (CFM) RPM Bhp Watts RPM Bhp Watts

5500 919 3.1 2544 963 3.3 2700 5800 940 3.4 2833 983 3.7 3044 6100 963 3.8 3167 6400 993 4.0 3322

AVAILABLE EXTERNAL STATIC PRESSURE(iwg)

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Table 10-FAN PERFORMANCE — 50TJ024 UNIT — ENGLISH


0.2 0.4 0.6 0.8 1 AIR

FLOW (CFM) RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts 6000 6400 691 2.6 2178 6800 707 3.0 2456 7200 683 3.0 2522 724 3.3 2767 7600 703 3.4 2856 742 3.8 3111 8000 686 3.6 2978 725 3.9 3233 762 4.2 3489 8400 672 3.7 3100 709 4.1 3356 746 4.4 3622 782 4.7 3900 8800 696 4.2 3500 731 4.6 3778 767 4.9 4056 801 5.2 4333 9200 687 4.4 3678 722 4.8 3956 757 5.1 4244 790 5.5 4533 824 5.8 4822 9600 712 5.0 4144 746 5.4 4433 779 5.7 4733 812 6.1 5033 844 6.4 5333

10000 740 5.6 4667 773 6.0 4967 805 6.4 5278 836 6.8 5589 867 7.1 5900

50TJ024

AVAILABLE EXTERNAL STATIC PRESSURE(iwg) 1.2 1.4 1.6 1.8 2

AIR FLOW (CFM) RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts 6000 722 2.6 2144 767 2.9 2367 810 3.1 2600 852 3.4 2844 892 3.7 3089 6400 735 2.9 2400 778 3.2 2633 819 3.5 2878 860 3.8 3122 899 4.1 3378 6800 750 3.3 2700 791 3.6 2944 831 3.9 3189 870 4.2 3444 908 4.5 3711 7200 764 3.6 3011 804 3.9 3267 842 4.3 3522 880 4.6 3789 917 4.9 4067 7600 781 4.1 3367 819 4.4 3633 856 4.7 3900 893 5.0 4178 929 5.4 4456 8000 799 4.5 3756 836 4.9 4033 872 5.2 4311 907 5.6 4600 942 5.9 4889 8400 818 5.0 4178 853 5.4 4456 887 5.7 4744 921 6.2 5100

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0.2 0.4 0.6 0.8 1 AIR

FLOW (CFM) RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts

6500 7000 7500 8000 788 4.4 3678 8500 815 5.1 4233 9000 705 4.5 3700 741 4.8 3978 775 5.1 4256 809 5.5 4544 843 5.9 4844 9500 741 5.2 4322 774 5.6 4611 807 5.9 4911 839 6.3 5211 871 6.7 5511

10000 776 6.0 5000 808 6.4 5311 839 6.8 5622 864 7.1 5867 901 7.6 6256 10500 811 7.0 5756 842 7.3 6078 872 7.7 6400 901 8.1 6733

50TJ028


AIR FLOW (CFM) RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts

6500 801 3.4 2822 842 3.7 3078 881 4.0 3322 920 4.3 3589 7000 779 3.6 2989 819 3.9 3244 858 4.2 3500 896 4.6 3767 7500 801 4.2 3444 839 4.5 3711 876 4.8 3978 913 5.1 4256 8000 825 4.8 3944 861 5.1 4222 896 5.4 4511 8500 850 5.4 4511 884 5.8 4800 918 6.2 5100 9000 876 6.2 5133 909 6.6 5444 9500 903 7.0 5822

Fig.2- Base Unit Dimension, 50TJ16-032

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0.2 0.4 0.6 0.8 1 AIR

FLOW (CFM) RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts 8000 8500 9000 9500 833 6.2 5384

10000 830 6.7 5779 861 7.1 6116 10500 828 7.2 6209 858 7.6 6547 888 7.9 6884 11000 829 7.7 6674 859 8.6 7442 888 8.5 7384 916 8.9 7733 11500 834 8.3 7221 863 8.8 7581 891 9.2 7942 919 9.6 8314 946 10.0 8686 12000 868 9.4 8174 895 9.9 8547 922 10.3 8919 949 10.7 9302 976 11.2 9686 12500 902 10.6 9209 928 11.1 9593 954 11.5 9977 980 12.0 10384 1005 12.4 10779

50TJ032


AIR FLOW (CFM) RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts RPM Bhp Watts 8000 830 4.8 4174 866 5.2 4465 902 5.5 4767 936 5.9 5070 8500 852 5.5 4744 886 5.8 5047 920 6.2 5349 953 6.5 5663 9000 840 5.8 5035 873 6.2 5349 905 6.5 5663 938 6.9 5988 970 7.3 6314 9500 865 6.6 5709 897 7.0 6035 928 7.3 6360 959 7.7 6698 990 8.1 7035

10000 892 7.4 6442 922 7.8 6779 952 8.2 7128 982 8.6 7477 1011 9.3 8058 10500 918 8.3 7233 947 8.8 7593 976 9.2 7942 1004 9.6 7140 1032 10.0 7460 11000 945 9.4 8105 972 9.8 8465 1000 10.2 8837 1028 10.6 9209 1055 11.1 9593 11500 974 10.5 9058 1000 10.9 9442 1027 11.3 9826 1053 11.8 10221 12000 1002 11.6 10081 1028 12.1 10477

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Base Unit Operation COOLING, UNITS WITHOUT ECONOMI$ER — When thermostat calls for cooling, terminals G and Y1 are energized. The indoor (evaporator) fan contactor (IFC), and compressor contactor no. 1 (C1) are energized and evaporator-fan motor, compressor no. 1 and condenser fans start. The condenser-fan motors run continuously while unit is cooling. If the thermostat calls for a second stage of cooling by energizing Y2, compressor contactor no. 2 (C2) is energized and compressor no. 2 starts. HEATING, UNITS WITHOUT ECONOMI$ER - (If Accessory or Optional Heater is Installed) — Upon a call for heating through terminal W1, IFC and heater contactor no. 1 (HC1) are energized. On units equipped for 2 stages of heat, when additional heat is needed, HC2 is energized through W2. SERVICE Cleaning — Inspect unit interior at beginning of each heating and cooling season and as operating conditions require. Remove unit top panel and/or side panels for access to unit interior. EVAPORATOR COIL — Clean as required with a commercial coil cleaner. CONDENSER COIL — Clean condenser coil annually and as required by location and outdoor-air conditions. Inspect coil monthly — clean as required. CONDENSATE DRAIN — Check and clean each year at start of cooling season. FILTERS — Clean or replace at start of each heating and cooling season, or more often if operating conditions require. Refer to Table 2 &3 for type and size.

Lubrication COMPRESSORS — Each compressor is charged with the correct amount of oil at the factory. Conventional white oil (Sontext 200LT) is used. White oil is compatible with 3GS oil, and 3GS oil may be used if the addition of oil is required. See compressor nameplate for original oil charge. A complete recharge should be four ounces less than the original oil charge. When a compressor is exchanged in the field it is possible that a major portion of the oil from the replaced compressor may still be in the system. While this will not affect the reliability of the replacement compressor, the extra oil will add rotor drag and increase power usage. To remove this excess oil, an access valve may be added to the lower portion of the suction line at the inlet of the compressor. The compressor should then be run for 10 minutes, shut down, and the access valve opened until no oil flows. This should be repeated twice to make sure the proper oil level has been achieved. FAN SHAFT BEARINGS — The bearings are of the pillow block type and have grease fittings. Lubricate the bearings twice annually. Typical lubricants are given below: Table. 14 – Recommended Lubrications.

MANUFACTURER LUBRICANT Texaco Mobil

Sunoco Texaco

Regal AFB-2* Mobilplex EP No. 1

Prestige 42 Multifak

*Preferred lubricant because it contains rust and oxidation inhibitors.

Table 13-FAN RPM AT MOTOR PULLEY SETTINGS* — ENGLISH

MOTOR PULLEY TURNS CLOSE

*Approximate fan rpm shown. *The standard belt size may not cover all the above range. Other RPMs require a field supplied Drive Package.

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Freq. Unit 50TJ 0 1/2 1 11/2 2 21/2 3 31/2 4 41/2 5

016 690 705 720 735 750 765 780 795 810 825 840 020 765 780 795 810 825 840 855 870 885 900 915 024 710 720 730 740 750 760 770 780 790 800 810 028 810 820 830 840 850 860 870 880 890 900 910

60 Hz

032 840 865 890 915 940 965 990 1015 1040 1065 1090 016 690 705 720 735 750 765 780 795 810 825 840 020 765 780 795 810 825 840 855 870 885 900 915 024 710 720 730 740 750 760 770 780 790 800 810 028 810 820 830 840 850 860 870 880 890 900 910

50 Hz

032 830 855 880 905 930 955 980 1005 1030 1055 1080

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CONDENSER AND EVAPORATOR-FAN MOTOR BEARINGS — The condenser and evaporator-fan motors have permanently-sealed bearings, so no field lubrication is necessary. Evaporator Fan Performance Adjustment— NOTE: To remove belts only, follow Steps 1, 2 & 6. Fan motor pulleys are factory set for speed shown in Table 1. To change fan speeds: 1. Shut off unit power supply. 2. Loosen belt by loosening fan motor mounting plate nuts. Slid the Motor and remove belt. 3. Loosen movable-pulley flange setscrew (see Fig. 9). 4. Screw movable flange toward fixed flange to increase speed and away from fixed flange to decrease speed. Increasing fan speed increases load on motor. Do not exceed maximum speed specified in Table 2 & 3. See Table 8 for air quantity limits. 5. Set movable flange at nearest keyway of pulley hub and tighten setscrew. (See Table 2, 3 & 13 for speed change for each full turn of pulley flange.) 6. Replace and tighten belts. See Belt Tension Adjustment section on the next page. To align fan and motor pulleys: 1. Loosen fan pulley setscrews. 2. Slide fan pulley along fan shaft. 3. Make angular alignment by loosening motor from mounting plate. Evaporator Fan Service and Replacement 1. Remove supply-air section panel (The bolts holding the flexible connection to the panel should be removed). 2. Remove the Control Side panel. 3. Remove the Belt (refer to the previous section for Belt removal). 4. Remove the locking device of the hub & shaft from the both sides, it can be accessed throw the supply panel side. 5. Pull the shaft gently from the control side, the blower will fall inside the blower housing. 6. Loosen the (lower) first two bolts from each side of the scroll fan housing mid-plate. This can be done from the supply panel side, now the fan can be removed easily from the supply panel side. 7. To assemble the fan, reverse the above procedure.

Fig. 9 — Evaporator-Fan Pulley Alignment and Adjustment Belt Tension Adjustment — To adjust belt tension: 1. Loosen fan motor bolts. 2. Adjust belt tension by sliding the motor on the mounting base. 3. Tighten nuts. 4. Adjust bolts and nut on mounting plate to secure motor in fixed position. Condenser-Fan Adjustment - (Fig. 10) 1. Shut off unit power supply. 2. Remove fan top-grille assembly and loosen fan hub screws. 3. Adjust fan height on unit, using a straightedge placed across the fan orifice. 4. Tighten setscrews and replace rubber hubcap to prevent hub from rusting to motor shaft. 5. Fill hub recess with permagum if rubber hubcap is missing.

NOTE: Dimensions are in inches.

Fig. 10 — Condenser-Fan Adjustment,

Refrigerant Charge — Amount of refrigerant charge is listed on unit nameplate and in Table 1. Refer to Carrier GTAC II; Module 5; Charging, Recovery, Recycling, and Reclamation section for charging methods and procedures. Unit panels must be in place when unit is operating during charging procedure. NOTE: Do not use recycled refrigerant as it may contain contaminants. NO CHARGE — Use standard evacuating techniques. After evacuating system, weigh in the specified amount of refrigerant (refer to Table 1). LOW CHARGE COOLING — Using cooling charging chart (see Fig. 11), add or remove refrigerant until conditions of the chart are met. Note that charging chart is different from those normally used. An accurate pressure gage and temperature-sensing device is required. Charging is accomplished by ensuring the proper amount of liquid sub-cooling. Measure liquid line pressure at the liquid line service valve using pressure gage. Connect temperature sensing device to the liquid line near the liquid line service valve and insulate it so that outdoor ambient temperature does not affect reading. TO USE THE COOLING CHARGING CHART — Use the above temperature and pressure readings, and find the intersection point on the cooling charging chart. If intersection point on chart is above line, add refrigerant. If intersection point on chart is below line, carefully recover some of the charge. Recheck suction pressure as charge is adjusted. NOTE: Indoor-air CFM must be within normal operating range of unit. All outdoor fans must be operating.

Fig. 11 — Cooling Charging Chart Filter Drier — Replace whenever refrigerant system is exposed to atmosphere.

Protective Devices COMPRESSOR PROTECTION Over current — Each compressor has internal line break motor protection, except the circuit no. 1 on the 50TJ028 unit and both circuits in 50TJ032 witch has an electronic module located with the compressor junction box, to provide motor protection. This electronic module monitors winding and discharge temperatures. If these temperatures reach the trip values, the module interrupts the control line and causes the compressor to switch off. IMPORTANT: After prolonged shutdown or servicing in cold wether, energize the crankcase heaters for 24 hours before starting the compressors. Compressor Lockout — If any of the safeties (high-pressure, low-pressure, freeze protection thermostat, compressor internal thermostat, external compressor thermal overload) trip, or if there is loss of power to the compressors, the CLO (compressor lockout) will lock the compressors off. To reset, manually move the thermostat setting. Compressor Overload — Each compressor contactor has its thermal over load devise. See table. 15 for thermal overload Amps settings. EVAPORATOR FAN MOTOR PROTECTION — The Evaporator Fan Contactor has its thermal over load devise. See table. 15 for thermal overload Amps settings. CONDENSER-FAN MOTOR PROTECTION — Each Condenser-fan motor is internally protected against over temperature. HIGH- AND LOW-PRESSURE SWITCHES — If either switch trips, or if the compressor over temperature switch activates, that refrigerant circuit will be automatically locked out by the CLO. To reset, manually move the thermostat setting. FREEZE PROTECTION THERMOSTAT (FPT) — An FPT is located on the top and bottom of the evaporator coil. It detects frost build-up and turns off the compressor, allowing the coil to clear. Once the frost has melted, the compressor can be reenergized. To reset, manually move the thermostat setting. Relief Devices — All units have relief devices to protect against damage from excessive pressures (e.g., fire). These devices protect the high and low side. Control Circuit, 24-V — This control circuit is protected against over-current by a 3.2-amp circuit breaker. Breaker can be reset. If it trips, determine cause of trouble before resetting. Replacement Parts — A complete list of replacement parts may be obtained from any Carrier distributor.

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Table. 15 – Thermal overloads settings. SETTINGS POWER SUPPLY

V/Ph/Hz UNIT SIZE INDOOR MOTOR COMP 1 COMP 2

16 12.0 31 31 20 12.0 38 31 24 18.0 42 38 28 18.0 55 42

230/3/60

32 27.0 55 55 16 7.0 18 18 20 7.0 22 18 24 11.0 24 22 28 11.0 32 24

380/3/60

32 16.5 32 32 16 6.0 16 16 20 6.0 17 16 24 9.0 21 17 28 9.0 26 21

460/3/60

32 14.5 26 26 16 7.0 17 17 20 7.0 21 17 24 10.5 26 21 28 10.5 30 26

400/3/50

32 16.0 30 30

WARNING Thermal overloads settings are factory adjusted; any change for these settings may affect the unit operation and can cause a serious failure.

IMPORTANT Field installed thermostat should include time delay between stages to limit the inrush current during the unit starting.

Fig.12-Typical Wiring Schematic- 60Hz & 50TJ016- 024 50Hz

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Fig.13-Typical Wiring Schematic- 50TJ028 - 032 50Hz

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Fig.14-Typical Wiring Schematic- (Cont.)

COMPONENT ARRANGEMENT 60HZ & SIZES 016-024 50HZ

COMPONENT ARRANGEMENT SIZES 028, 032 50HZ

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Fig.15-Typical Wiring Schematic -(Cont.)

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TROUBLESHOOTING Table 16 — Cooling Service Analysis PROBLEM CAUSE REMEDY

Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, or control relay.

Replace component.

Insufficient line voltage. Determine cause and correct. Incorrect or faulty wiring. Check wiring diagram and rewire correctly.

Compressor and condenser fan will not start.

Thermostat setting too high. Lower thermostat setting below room temperature.

Faulty wiring or loose connections in compressor circuit. Check wiring and repair or replace. Compressor motor burned out, seized, or internal overload open.

Determine cause. Replace compressor.

Defective overload. Determine cause and replace. Compressor locked out Determine cause for safety trip and reset lockout.

Compressor will not start but condenser fan runs.

One leg of 3-phase power dead. Replace fuse or reset circuit breaker. Determine cause.

Refrigerant overcharge or undercharge. Recover refrigerant, evacuate system, and recharge to nameplate.

Defective compressor. Replace and determine cause. Insufficient line voltage. Determine cause and correct. Blocked condenser. Determine cause and correct. Defective overload. Determine cause and replace. Defective thermostat. Replace thermostat. Faulty condenser-fan motor. Replace.

Compressor cycles (other than normally satisfying thermostat).

Restriction in refrigerant system. Locate restriction and remove. Dirty air filter. Replace filter. Unit undersized for load. Decrease load or increase unit size. Thermostat set too low. Reset thermostat. Low refrigerant charge. Locate leak, repair, and recharge. Air in system. Recover refrigerant, evacuate system, and

recharge.

Compressor operates continuously.

Condenser coil dirty or restricted. Clean coil or remove restriction. Dirty air filter. Replace filter. Dirty condenser coil. Clean coil. Refrigerant overcharged. Recover excess refrigerant. Faulty TXV. 1. Check TXV bulb mounting and secure tightly

to suction line. 2. Replace TXV if stuck open or closed.

Air in system. Recover refrigerant, evacuate system, and recharge.

Excessive head pressure.

Condenser air restricted or air short-cycling. Determine cause and correct. Low refrigerant charge. Check for leaks, repair, and recharge. Head pressure too

low.

Restriction in liquid tube. Remove restriction.

High heat load. Check for source and eliminate. Faulty TXV. 1. Check TXV bulb mounting and secure tightly


Excessive suction pressure.

Refrigerant overcharged. Recover excess refrigerant. Dirty air filter. Replace filter. Low refrigerant charge. Check for leaks, repair, and recharge. Metering device or low side restricted. Remove source of restriction. Faulty TXV. 1. Check TXV bulb mounting and secure tightly


Insufficient evaporator airflow. Increase air quantity. Check filter and replace if necessary.

Temperature too low in conditioned area. Reset thermostat.

Suction pressure too low.

Field-installed filter drier restricted. Replace.

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Notes

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Notes

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Notes

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START-UP CHECKLIST

(Remove and Store in Job File)

I. PRELIMINARY INFORMATION

MODEL NO.:

DATE:

SERIAL NO.:

TECHNICIAN:

II. PRE-START-UP (insert checkmark in box as each item is completed)

M VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

M VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS

M CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS

M VERIFY THAT UNIT INSTALLATION IS LEVEL

M CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREWTIGHTNESS

III. START-UP

ELECTRICAL

SUPPLY VOLTAGE L1-L2 L2-L3 L3-L1

COMPRESSOR - 1 AMPS L1 L2 L3

INDOOR FAN AMPS

TEMPERATURES

OUTDOOR-AIR TEMPERATURE DB

RETURN-AIR TEMPERATURE DB WB

COOLING SUPPLY AIR

PRESSURES

REFRIGERANT SUCTION CIR 1 PSIG

REFRIGERANT DISCHARGE CIR 1 PSIG

----------------------------------------------------------------------------------------

CUTALO

NGDOTTEDLINE

COMPRESSOR - 2 AMPS L1 L2 L3

VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 18.

REFRIGERANT SUCTION CIR 2 PSIG

REFRIGERANT DISCHARGE CIR 2 PSIG

M

Form 50TJSD-04 IOM

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