Technical Guide

FPO

LK-HGDTBJune 2017

Replaces LK-HGDTB, March 2011

Mohave

2

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Condensing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 Mohave Hot Gas Defrost Quick Reference . . . . . . . . . . 5 AWEF Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Mohave Hot Gas Unit Cooler Typical Factory Piping . 19Medium Profile Evaporator . . . . . . . . . . . . . . . . . . . . . . 20-22Large Unit Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-28Refrigeration and Defrost Operation . . . . . . . . . . . . . 29-31Mohave Hot Gas Defrost Cycle Diagrams . . . . . . . . . 32-33

Table of Contents

The Mohave advanced hot gas defrost refrigeration system with electronic controller utilizes hot gas to greatly reduce defrost times and operates in all outdoor ambient temperatures.* This leads to increased energy efficiency and product integrity in a refrigeration system that can be used in a greater variety of environmental conditions. This system utilizes a state-of-the-art electronic defrost controller with a proprietary control scheme that allows the system to continually operate at its most optimal level.

Overview

Electronic Controller completely manages timing and sequence of defrost

Point to point wiring to all control components

Automatically compensates for changes in outdoor temperatures

Quick and easy troubleshooting

Monitors all pressures, temperatures, and setpoints in real time.

Easily programmable through a menu driven interface

The control board with conformal coating will handle the toughest conditions

LED indicators on the board clearly show system status

Remote alarm notification

Significant energy savings over electric defrost systems

*Tested to -20F ambient

Hot Gas Control Board Features & Benefits

E Solutions branded products and options are designed to exceed current energy and environmental standards . We have made a conscious commitment to developing environmentally innovative products that allow our customers to make energy efficient, eco-conscious choices . Products included in the E Solutions portfolio reduce costs, improve bottom lines, and enhance both equipment performance and service life . The Mohave Advanced Hot Gas Defrost System contains a sophisticated controller with sensors that gather information and assess the condition of the system to defrost more efficiently, resulting in energy savings . To further increase energy savings, EC motors are available for some evaporator models .

3

Electric Drain Pan Heater (Std) Advantages In this option, the drain pan surface is heated with low

wattage electric heater(s)

The electrical power requirements to the evaporator are unchanged

Lower cost solution

Defrost is even quicker because more hot gas is available to defrost the evaporator coil

Hot Gas Drain Pan Loop Advantages In this option, hot refrigerant gas passes through a loop

of copper tubing that heats the drain pan surface before it defrosts the evaporator coil

In applications where there is limited evaporator accessibility (ex: controlled atmosphere rooms)

Electric Vs. Hot Gas Drain Pan

Condensing Unit

Integral condenser sub-cooling circuit in condenser for added capacity and vapor free liquid

Floating Tube condenser coil design Electronic defrost controller Pressure or ambient fan cycling for head pressure control Electronic pressure regulator for defrost control Anti-short cycling protection High pressure and low pressure controls Oil pressure safety control Easily accessible control box High efficiency Copeland Discus compressors with poe oil Thermally protected permanently lubricated ball bearing condenser fan motor(s) Receivers are sized for sufficient pumpdown capacity with inlet and outlet service valves Cabinet is constructed from painted galvanized steel Replaceable core liquid line filter drier Replaceable core suction filter

Main System Features

Evaporators

All components are factory installed and wired Independent or single point power supply from condensing unit 4 and 6 FPI medium and large unit coolers

Features: Mounted TXV and distributor nozzle Mounted check valves Mounted liquid line solenoid Mounted suction P trap Electric drain pan heater standard (mounted hot gas drain pan

loop optional) Mounted and wired control contactors

4

LDV 150 2 L 6 CLDV Vertical Air Discharge

Nominal Horsepower060 6 HP075 7.5 HP076 7.5 HP080 8 HP090 9 HP100 10 HP

Refrigerant6 R-404A, R-507, R-407A, R-407C,

R-407F, R-448A/R-449A

Application (SST)L Low (0F to -40F)M Medium (30F to -10F)

Electrical CharacteristicsC 208-230/3/60D 460/3/60K 230/3/60E 575/3/60

Vertical Air Discharge Condensing Unit

Hot Gas Defrost 2

120 12 HP150 15 HP200 20 HP250 25 HP300 30 HP350 35 HP400 40 HP

Nomenclature

The LDV Outdoor Discus Condensing Unitfeatures a leak resistant design which includes:

The Floating Tube condenser coil design.Refrigerant carrying copper tubes do not contact any metal support sheets; instead, the coil is constructed with expanded anchor tubes which support the coil construction and do not carry refrigerant. The coil design eliminates one of the major causes of leaks in refrigeration systems

Limited five year warranty against condenser tube sheet and center support leaks

Designed for use with R-404A, R-507, R-407A, R-407F, R-407C, and R-448A/R-449A

Polyol Ester Oil charge on all units Pre-bent copper tubes minimize braze joints on

internal piping Encapsulated high pressure switch eliminates

capillary tubes Sentronic oil safety control ServiceMate diagnostic module Electronic defrost controller

Other Standard Features

High efficiency Copeland Discus compressors Thermally protected, permanently lubricated ball

bearing condenser fan motors Electrical controls including compressor contactor,

relays, and electronic controls are located in easily accessible control box with a hinged cover

Receivers sized for sufficient pumpdown capacity with inlet and outlet service valves

Cabinet constructed from pre-painted steel Convenient access panels for easy servicing to

internal components Suction and discharge vibration eliminators Separate subcooling circuit in condenser for added

capacity and vapor free liquid Replaceable core liquid line filter drier and sight glass Replaceable core suction filter Anti-short cycle timer Suction accumulator Condenser fan cycling (pressure or temperature) Pressure relief valve on receiver Crankcase heater

Optional Features

Oil separator Fused disconnect switch Non-fused disconnect switch Coated condenser coils for protection against metal erosion in harsh environments Manual reset high pressure switch Low ambient kit with insulated, heated receiver Phase loss protection Adjustable head pressure control valves Demand Cooling Evaporator control contactors mounted in

condensing unit

ProgramReview

Clear/Test

ResetTimeMonitorEnter

SelectionKnob

ForceService

ForceDefrost

Mode DescriptionOFF Compressor Off

COOL Compressor On in Cooling Normal Cooling Operation

PMPD System in Pump Down Mode

SERV Service Mode, System is Off

DELY Timed Delay

DEF1 Defrost Stage 1Pre-Defrost or Bypass Mode

DEF2 Defrost Stage 2Defrost Mode

DEF3 Defrost Stage 3Post Defrost Equalization or Drain Down Mode

FREZ Refreeze Mode

TEST Test Mode

SERV Service Mode

EVAC Evacuation Mode

Operating Modes

5

Mohave Hot Gas Defrost Controller Quick Reference Guide

Control ButtonsProgram Review: Review or Change the Program SettingsEnter: Accepts changes into memoryMonitor: View Current Operating Conditions of the SystemReset Time: Resets the time clocks of the microprocessor to 0.Clear/Test: Clear ignores program selections prior to pressing Enter and terminates Service Mode. Test causes the system to cycle through all of the outputs for troubleshooting.Select Knob: Used for Cycling through Monitoring and Programming ParametersForce Service: Press this button twice to cause the system to pump down and remain off until the Clear button is pressed.Force Defrost: System will pump down and begin a defrost cycle. This will not effect the normally scheduled defrosts

Fast, dependable, and efficient positive defrost of evaporators

Five to ten minute defrost times in most applications Will operate efficiently in all outdoor ambient

conditions* Significant energy savings over electric defrost systems Highest levels of product integrity through more stable

box temperatures.

The Mohave Electronic Controller

*Tested to -20F ambient

Service SwitchThis toggle switch may be placed in the on position to force the system into Service Mode. The compressor will pump down and shut off. The evaporator fans will de-energize. The system can be left in service mode for seasonal OFF situations.

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Liquid Receiver with Service Valves Allow Charge IsolationSuction Accumulator

Condenser FanContactors

Compressor Contactor

Control Circuit Fuses& Service Switch

All Service Controls are located in a separate electrical panel allowing field adjustments without disconnecting power to the unit

Oil Pressure Switch

ServiceMate Diagnostic Module

Main Power Block

3-Way Valve

Electronic PressureRegulator

BypassSolenoid

DefrostSolenoid

Suction StopSolenoid

Galvanized SteelBase with Rigging Points

Pre-bent Internal PipingPrevents Braze Joints

Replaceable Core Liquid Filter Drier

Replaceable Core Suction Filter

Easily AccessibleDiscus Compressor

Mohave Hot Gas SystemController

Electrical Service Knockouts

Control CircuitTransformers

Electrical Box Features

Typical Internal Piping

7

Performance Data Model LDV Medium Temperature

R-404A or R-507Model LDV

AmbientTemp. F

Saturated Suction Temperature F

25FBTUH

20FBTUH

15FBTUH

10FBTUH

5FBTUH

0752M6

90 70,900 64,300 57,900 51,700 45,90095 67,600 61,300 55,300 49,400 43,800

100 64,500 58,500 52,800 47,100 41,600110 58,300 53,000 47,700 42,400 37,400

0762M6

90 80,300 73,400 66,600 60,000 53,60095 76,800 70,100 63,500 57,300 51,000

100 73,100 66,800 60,700 54,600 48,700110 66,200 60,600 54,900 49,200 43,700

0802M6

90 94,300 86,000 77,900 70,200 62,70095 90,500 82,600 74,900 67,500 60,000

100 86,800 79,200 71,800 64,400 57,500110 79,000 72,400 65,700 59,000 52,500

1002M6

90 114,800 104,900 95,100 85,800 76,80095 110,100 100,600 91,300 82,200 73,400

100 105,300 96,200 87,400 78,600 70,000110 95,700 87,500 79,300 71,200 63,200

1202M6

90 138,300 126,500 115,100 103,800 92,80095 132,500 121,200 110,300 99,400 88,800

100 126,600 116,100 105,400 95,000 84,800110 115,100 105,400 95,700 86,200 76,600

1502M6

90 153,300 140,300 127,600 115,000 102,90095 146,800 134,300 122,200 110,200 98,500

100 140,300 128,700 116,900 105,300 94,000110 127,500 116,800 106,100 95,600 85,100

2002M6

90 162,500 147,300 132,900 119,300 106,00095 154,200 140,100 126,500 113,200 100,400

100 146,400 133,100 119,900 107,100 94,800110 131,000 118,600 106,500 94,700 83,300

2502M6

90 212,900 193,000 174,000 156,200 139,40095 203,800 184,600 166,500 149,000 132,800

100 194,700 176,100 158,600 141,800 126,200110 176,800 159,600 143,100 127,400 112,600

3002M6

90 249,200 227,500 206,500 185,600 165,50095 238,100 217,300 197,200 177,100 157,800

100 226,900 207,400 187,900 168,600 150,000110 205,000 186,900 169,100 151,500 134,500

3502M6

90 312,300 285,400 259,300 234,400 209,60095 297,800 272,700 248,300 223,600 200,000

100 284000 260,400 236,600 212,900 189,800110 256900 235,000 213,200 191,400 169,900

4002M6

90 359700 329,700 300,600 272,000 244,20095 345100 315,900 287,400 259,800 232,900

100 329600 301,500 274,300 247,500 221,600110 298200 272,700 247,400 222,600 198,600

8

Performance Data Model LDV Medium Temperature

R-407A/R-407FModel LDV

AmbientTemp. F

Saturated Suction Temperature F

25FBTUH

20FBTUH

15FBTUH

10FBTUH

5FBTUH

0752M6

90 69,400 62,400 56,100 50,200 44,700

95 66,700 60,000 53,900 48,200 43,000

100 63,900 57,500 51,700 46,200 41,200

110 58,400 52,500 47,200 42,200 37,600

0762M6

90 77,300 69,400 62,000 55,100 48,900

95 74,200 66,600 59,500 52,900 46,900

100 71,000 63,700 56,900 50,600 44,800

110 64,800 58,100 51,800 46,100 40,700

0802M6

90 93,500 83,500 74,200 65,500 57,600

95 89,600 80,000 71,100 62,700 55,100

100 85,600 76,500 67,900 59,900 52,600

110 77,800 69,500 61,600 54,200 47,500

1002M6

90 115,200 102,900 91,400 80,900 71,300

95 110,700 98,900 87,800 77,600 68,400

100 106,100 94,700 84,100 74,300 65,400

110 96,800 86,400 76,600 67,500 59,200

1202M6

90 132,700 118,400 105,200 92,900 81,700

95 127,200 113,500 100,900 89,000 78,400

100 121,600 108,700 96,500 85,100 74,900

110 110,400 98,700 87,500 77,100 67,700

1502M6

90 153,900 137,700 122,900 108,900 96,100

95 147,900 132,500 118,200 104,700 92,300

100 142,000 127,200 113,500 100,500 88,400

110 130,300 116,900 104,200 92,100 80,800

2002M6

90 188,700 169,700 152,300 136,100 121,300

95 181,200 163,000 146,300 130,600 116,400

100 173,700 156,200 140,100 125,100 111,400

110 158,600 142,500 127,700 114,100 101,300

2502M6

90 215,700 193,400 173,000 154,200 136,900

95 207,500 186,100 166,300 148,200 131,500

100 199,100 178,500 159,600 142,100 126,000

110 182,400 163,400 146,000 129,800 115,000

3002M6

90 252,600 227,400 203,500 181,200 160,100

95 242,500 218,300 195,400 174,000 153,800

100 232,100 209,000 187,100 166,700 147,400

110 211,200 190,100 170,500 151,900 134,600

3502M6

90 310,300 279,500 250,300 222,900 197,500

95 299,700 270,000 241,900 215,400 190,700

100 289,200 260,700 233,500 207,800 183,900

110 267,700 241,700 216,400 192,400 169,900

4002M6

90 370,100 333,000 298,000 265,000 234,500

95 357,700 321,900 288,000 256,200 226,600

100 345,200 310,800 278,200 247,300 218,600

110 319,900 288,100 258,000 229,200 202,300

9

Performance Data Model LDV Medium Temperature

R-407CModel LDV

AmbientTemp. F

Saturated Suction Temperature F

25FBTUH

20FBTUH

15FBTUH

0752M6

90 61,900 54,800 48,500

95 59,700 52,900 46,800

100 57,600 51,000 45,100

110 53,500 47,400 41,900

0762M6

90 69,600 61,700 54,600

95 67,100 59,500 52,600

100 64,800 57,300 50,600

110 60,100 53,100 46,800

0802M6

90 84,200 75,400 67,200

95 81,400 72,800 64,800

100 78,500 70,100 62,300

110 72,500 64,500 57,100

1002M6

90 102,800 92,100 82,200

95 99,500 89,100 79,500

100 96,200 86,100 76,700

110 89,100 79,500 70,400

1202M6

90 118,900 106,300 94,600

95 115,000 102,700 91,400

100 110,900 99,000 88,000

110 102,300 91,000 80,500

1502M6

90 135,400 121,500 108,500

95 131,200 117,700 105,100

100 126,900 113,800 101,600

110 118,200 105,800 94,100

2002M6

90 165,500 147,800 130,800

95 158,800 141,700 125,400

100 152,100 135,800 120,300

110 139,600 124,500 110,500

2502M6

90 194,300 172,500 152,600

95 186,100 165,500 146,700

100 178,100 158,700 140,900

110 162,900 145,800 129,800

3002M6

90 223,400 199,600 178,000

95 214,500 192,100 171,700

100 205,900 184,900 165,600

110 189,900 171,600 154,300

3502M6

90 267,300 239,300 214,100

95 257,900 231,100 206,900

100 248,300 222,700 199,500

110 228,300 205,100 183,600

4002M6

90 324,700 289,000 258,100

95 306,600 273,200 245,200

100 288,200 257,100 232,000

110 250,000 225,500 205,700

10

Performance Data Model LDV Medium Temperature

R-448A/R-449AModel LDV

AmbientTemp. F

Saturated Suction Temperature F

25FBTUH

20FBTUH

15FBTUH

10FBTUH

5FBTUH

0752M6

90 67,500 60,600 54,300 48,400 43,000

95 65,100 58,500 52,400 46,700 41,500

100 62,700 56,300 50,400 45,000 39,900

110 57,700 51,900 46,400 41,400 36,700

0762M6

90 75,600 67,800 60,600 53,800 47,600

95 72,800 65,300 58,300 51,800 45,800

100 70,000 62,700 56,000 49,700 44,000

110 64,200 57,500 51,300 45,600 40,300

0802M6

90 91,700 82,300 73,600 65,300 57,700

95 88,200 79,300 70,700 62,800 55,300

100 84,700 76,100 67,800 60,100 52,900

110 77,600 69,600 61,900 54,600 47,700

1002M6

90 112,200 100,800 90,100 80,100 70,900

95 108,300 97,200 86,800 77,100 68,200

100 104,300 93,600 83,500 74,100 65,300

110 95,900 85,900 76,500 67,600 59,300

1202M6

90 129,900 116,400 103,900 92,100 81,400

95 125,100 112,200 100,000 88,600 78,200

100 120,100 107,700 96,000 85,000 74,800

110 110,200 98,600 87,700 77,300 67,600

1502M6

90 150,300 135,000 120,800 107,300 94,800

95 145,100 130,400 116,600 103,500 91,400

100 139,900 125,700 112,400 99,700 87,800

110 129,400 116,400 103,900 91,900 80,700

2002M6

90 185,300 166,600 149,400 133,300 118,500

95 178,500 160,500 143,900 128,300 114,100

100 171,600 154,200 138,200 123,300 109,600

110 157,700 141,600 126,900 113,100 100,300

2502M6

90 210,100 188,300 168,400 149,900 132,900

95 202,700 181,800 162,400 144,600 128,100

100 195,200 175,000 156,400 139,100 123,200

110 180,100 161,300 144,000 127,900 113,100

3002M6

90 247,300 222,700 199,300 177,200 156,200

95 238,300 214,500 191,900 170,500 150,200

100 229,100 206,000 184,400 163,600 144,000

110 209,400 188,200 168,300 149,100 131,000

3502M6

90 303,500 273,300 244,600 217,600 192,400

95 294,300 265,100 237,300 210,900 186,500

100 284,800 256,800 229,800 204,200 180,300

110 265,700 239,600 214,300 190,200 167,600

4002M6

90 361,800 325,400 291,000 258,500 228,400

95 350,800 315,700 282,300 250,700 221,400

100 339,700 305,800 273,500 242,800 214,200

110 317,100 285,500 255,300 226,500 199,500

11

AWEF Values: Medium/High Temperature Condensing Units - Cooler Application

ModelOutdoor

R404A/R507A R407A/R407F R407C R448A/R449A

LDV0752M6 9 .45 8 .78 8 .32 8 .92

LDV0762M6 9 .53 8 .90 8 .44 9 .01

LDV0802M6 10 .11 9 .27 8 .82 9 .37

LDV1002M6 9 .75 9 .27 8 .82 9 .35

LDV1202M6 9 .68 9 .35 8 .72 9 .46

LDV1502M6 9 .02 8 .65 8 .02 8 .71

LDV2002M6 9 .34 8 .89 8 .56 9 .03

LDV2502M6 9 .18 8 .45 8 .21 8 .52

LDV3002M6 9 .05 8 .56 8 .32 8 .68

LDV3502M6 9 .41 8 .78 8 .27 8 .91

LDV4002M6 8 .93 8 .54 8 .41 8 .72

These refrigeration systems are designed and certified for use in walk-in cooler applications.

12

Performance Data Model LDV Low Temperature

R-404A or R-507Model LDV

AmbientTemp. F

Saturated Suction Temperature F0F

BTUH-10FBTUH

-15FBTUH

-20FBTUH

-30FBTUH

-40FBTUH

0602L6

90 55,500 44,800 39,800 35,100 26,900 20,400

95 53,000 42,700 37,900 33,400 25,400 19,000

100 50,500 40,600 36,000 31,600 23,900 17,600

110 45,400 36,500 32,200 28,200 20,900 14,900

0752L6

90 64,200 52,000 46,300 40,900 31,400 23,900

95 61,300 49,700 44,100 38,900 29,700 22,300

100 58,400 47,300 42,000 37,000 28,000 20,700

110 52,600 42,600 37,700 33,100 24,600 17,400

0902L6

90 78,600 63,600 56,600 50,000 38,400 29,200

95 75,200 60,800 54,000 47,700 36,300 27,400

100 71,900 58,000 51,400 45,300 34,300 25,500

110 65,100 52,400 46,300 40,500 30,300 21,800

1002L6

90 86,000 70,400 62,700 55,700 43,000 32,800

95 82,300 67,100 59,800 53,000 40,700 30,600

100 78,700 64,000 57,000 50,300 38,300 28,500

110 71,600 57,800 51,300 45,000 33,700 24,200

1202L6

90 89,100 73,000 64,900 57,400 43,900 32,900

95 84,900 69,400 61,800 54,500 41,300 30,300

100 80,800 66,000 58,800 51,700 38,700 27,800

110 72,400 59,300 52,600 46,100 33,600 22,400

1502L6

90 117,500 96,600 86,700 77,300 60,000 45,500

95 112,100 92,100 82,500 73,400 56,700 42,600

100 106,800 87,600 78,300 69,600 53,500 39,800

110 95,900 78,500 70,100 61,900 47,100 34,100

2202L6

90 139,400 115,800 103,700 92,400 71,500 52,400

95 132,200 109,500 98,300 87,400 67,100 49,500

100 125,000 103,500 92,800 82,400 62,800 45,600

110 110,500 91,500 81,900 72,400 54,200 37,800

2702L6

90 175,500 144,100 128,300 113,700 87,400 65,500

95 167,400 136,800 122,100 107,900 82,300 60,900

100 159,900 130,000 115,900 102,200 77,300 56,200

110 143,500 116,300 103,300 90,700 67,200 47,100

3002L6

90 192,900 158,100 141,400 125,300 96,700 73,600

95 183,400 150,200 134,100 118,700 90,800 68,200

100 173,900 142,300 126,900 112,200 84,900 62,600

110 154,700 126,300 112,300 98,500 73,400 51,800

Demand Cooling is required for all applications

13

Performance Data Model LDV Low TemperatureDemand Cooling is required for all applications

R-407A/R-407FModel LDV

AmbientTemp. F

Saturated Suction Temperature F0F

BTUH-10FBTUH

-15FBTUH

-20FBTUH

-30FBTUH

-40FBTUH

0602L6

90 52,800 40,300 34,900 30,000 21,500 14,100

95 50,500 38,400 33,200 28,400 20,100 13,600

100 48,300 36,500 31,500 26,800 18,800 12,400

110 43,700 32,700 28,000 23,600 16,000 9,800

0752L6

90 62,200 48,300 42,300 36,800 26,900 17,800

95 59,700 46,100 40,300 34,800 25,200 16,300

100 57,100 43,900 38,200 32,900 23,400 14,700

110 52,100 39,600 34,100 29,000 19,900 12,400

0902L6

90 76,200 58,500 50,700 43,600 31,300 20,600

95 72,900 55,700 48,200 41,300 29,300 18,800

100 69,600 53,000 45,700 39,000 27,200 17,000

110 62,800 47,400 40,500 34,200 23,100 13,200

1002L6

90 82,700 63,600 55,200 47,500 34,100 22,400

95 79,000 60,500 52,400 45,000 31,900 20,500

100 75,400 57,500 49,600 42,400 29,600 18,500

110 67,900 51,400 44,000 37,200 25,100 14,900

1202L6

90 93,700 73,500 64,100 55,200 39,000 25,500

95 89,300 70,000 60,900 52,200 36,500 24,000

100 85,000 66,300 57,500 49,200 33,900 21,100

110 75,700 58,600 50,500 42,600 28,400 16,200

1502L6

90 112,100 88,700 77,800 67,600 49,100 33,800

95 107,200 84,700 74,200 64,400 46,500 31,600

100 102,300 80,700 70,600 61,100 43,900 29,300

110 92,500 72,600 63,300 54,400 38,300 24,700

2202L6

90 142,800 109,700 95,200 82,100 60,400 45,100

95 136,600 104,600 90,600 78,000 57,300 43,100

100 130,400 99,400 85,900 73,800 54,100 41,000

110 117,400 88,700 76,200 65,000 47,500 36,500

2702L6

90 166,000 128,800 112,300 97,000 69,200 44,100

95 159,200 123,000 107,000 92,000 66,200 40,300

100 151,900 117,000 101,400 86,900 60,400 36,200

110 136,900 104,300 89,500 75,700 51,600 27,200

3002L6

90 199,000 155,000 135,000 116,900 83,700 51,600

95 190,300 147,500 128,500 110,700 78,200 46,800

100 181,400 140,000 121,600 104,300 72,500 43,200

110 162,700 124,200 106,800 90,500 61,600 32,100

14

Performance Data Model LDV Low TemperatureDemand Cooling is required for all applications

R-448A/R-449AModel LDV

AmbientTemp. F

Saturated Suction Temperature F0F

BTUH-10FBTUH

-15FBTUH

-20FBTUH

-30FBTUH

-40FBTUH

0602L6

90 51,600 39,300 34,000 29,300 21,400 15,400

95 49,600 37,600 32,400 27,800 20,100 14,300

100 47,600 35,900 30,900 26,300 18,900 13,100

110 43,300 32,300 27,500 23,300 16,200 10,700

0752L6

90 60,900 47,100 41,300 35,900 26,600 18,600

95 58,600 45,100 39,300 34,100 25,000 17,000

100 56,300 43,100 37,400 32,300 23,300 15,500

110 51,700 39,000 33,500 28,600 19,900 12,300

0902L6

90 74,800 57,300 49,700 42,900 31,200 21,600

95 71,800 54,800 47,400 40,700 29,300 19,700

100 68,800 52,200 45,000 38,500 27,300 17,800

110 62,500 46,900 40,100 33,900 23,100 13,900

1002L6

90 81,200 62,300 54,100 46,700 34,000 23,500

95 77,900 59,600 51,600 44,300 31,800 21,500

100 74,500 56,700 48,900 41,800 29,600 19,400

110 67,700 50,900 43,500 36,800 25,100 14,600

1202L6

90 92,100 71,900 62,700 54,000 38,700 26,600

95 88,100 68,700 59,700 51,200 36,300 24,400

100 83,900 65,200 56,500 48,300 33,700 22,100

110 75,400 58,100 49,900 42,100 28,400 17,500

1502L6

90 109,600 86,400 75,700 65,800 48,600 35,500

95 105,200 82,800 72,400 62,800 46,200 33,300

100 100,700 79,100 69,100 59,800 43,600 31,100

110 91,600 71,500 62,200 53,500 38,300 26,500

2202L6

90 138,100 106,300 92,900 80,800 59,100 37,800

95 132,700 101,700 88,600 76,800 55,500 35,400

100 127,100 97,100 84,300 72,600 51,700 32,000

110 116,000 87,600 75,500 64,300 44,200 25,100

2702L6

90 163,100 125,800 109,500 94,600 68,600 46,500

95 156,800 120,500 104,600 90,000 64,400 42,700

100 150,000 114,900 99,400 85,200 60,000 38,600

110 136,000 103,000 88,300 74,500 49,300 33,600

3002L6

90 196,000 151,700 132,100 114,400 82,700 55,200

95 188,000 144,900 126,000 108,600 77,500 50,300

100 179,700 137,900 119,500 102,500 72,000 45,100

110 162,200 123,100 105,600 89,200 59,900 39,100

15

ModelLDV Compressor

CondenserFan Data Connections

Receiver (90% Full)

R404ALbs.

Dim. Info.See Figure

Approx.Net

WeightLbs.

No.Fans Dia. Liquid Suction

0752M6 2DL3R78KE 2 24 5/8 1-3/8 93 / 81 A 1550

0762M6 2DA3R89KE 2 24 5/8 1-3/8 93 / 81 A 1550

0802M6 3DA3R10ME 2 24 5/8 1-5/8 93 / 81 A 1650

1002M6 3DB3R12ME 2 26 5/8 1-5/8 93 / 81 B 1725

1202M6 3DF3R15ME 2 26 7/8 2-1/8 93 / 81 B 1750

1502M6 3DS3R17ME 2 30 7/8 2-1/8 142 / 123 C 1780

2002M6 4DBNR20ME 2 30 7/8 2-1/8 142 / 123 C 1860

2502M6 4DHNR22ME 3 30 1-1/8 2-1/8 142 / 123 D 1950

3002M6 4DJNR28ME 3 30 1-1/8 2-1/8 216 / 188 D 1950

3502M6 6DHNR35ME 3 30 1-1/8 2-1/8 216 / 188 D 2800

4002M6 6DJNR40ME 4 30 1-1/8 2-1/8 216 / 188 E 3000

0602L6 3DA3F28KE 2 24 5/8 1-3/8 81 A 1600

0752L6 3DB3F33KE 2 24 5/8 1-3/8 81 A 1600

0902L6 3DF3F40KE 2 24 5/8 1-5/8 81 A 1650

1002L6 3DS3F46KE 2 24 5/8 1-5/8 81 A 1650

1202L6 4DBNF54KE 2 24 5/8 1-5/8 81 A 1700

1502L6 4DHNF63KE 2 26 7/8 2-1/8 81 B 1850

2202L6 4DJNF76KE 2 30 7/8 2-1/8 81 C 2120

2702L6 6DHNF93KE 2 30 1-1/8 2-1/8 123 C 2180

3002L6 6DJNF11ME 2 30 1-1/8 2-1/8 123 C 2200

Specifications and Dimensions Model LDV

16

4.03

6.66O 2.50 K.O.

O 1.38 X 1.75 K.O.

44.5

1.76FRAME C/L

99.34LIQUID

109.48SUCTION

15.00

144.00

15.00

7.41LIQUID

9.70SUCTION

55.5

O 3.00

8.46 10.1411.58

8.4610.1411.58

4.03

6.66O 2.50 K.O.

O 1.38 X 1.75 K.O.

44.5

1.76FRAME C/L 15.00

99.34LIQUID

SUCTION

142.75148.25

170.68

15.00

9.707.41

O 3.00

55.5

LIQUID SUCTION

4.03

6.66O 2.50 K.O.

O 1.38 X 1.75 K.O.

44.5

1.76FRAME C/L 15.00

99.50

148.25

225.67

O 3.00

55.5

7.41

15.00LIQUID

SUCTION

LIQUID8.4610.1411.58

4.10

6.73O 2.50 K.O.

O 1.38 X 1.75 K.O.

44.7

1.76FRAME C/L

LIQUID

57.5

15.00

99.50

125.00

148.25SUCTION

280.05

9.41LIQUID

11.70LIQUID

O 3.0015.00

10.4612.1413.58

Dimensions (Inches) Model LDV

15.00

109.57SUCTION

15.00

6.56LIQUID

9.27SUCTION8.46

10.1411.58

4.02

6.64

44.50

1.76FRAME C/L

O 2.50 K.O.

O 1.38 X 1.75 K.O.

O 3.00

120

99.22LIQUID

55.5A

B

C

D

E

17

Independent Vs. Single Power SuppliesIndependent Power Supplies for Condensing Units and Unit Coolers (Std)

Advantages

In this option, a separate high voltage power supply is run to each evaporator and the condensing unit

Low voltage control wiring is run between the condensing unit and each evaporator (including evaporator sensor, liquid solenoid and evaporator control contactor(s)

Electrician can run simple point-to-point power supplies without having to understand the control circuit wiring

Evaporator disconnect switch wiring is simplified (if required)

Refrigeration contractors can generally run the low voltage wiring with the refrigeration piping and make these wiring connections with a good understanding of the control circuit function

The condensing unit wire size and fusing requirements are minimized because they dont include a worst-case remote evaporator load

Lower cost installation solutionSingle Power Supply for Condensing Unit Providing Power to Unit Coolers

Advantages

In this option, a power supply is run to the condensing unit and high voltage wiring is run from the condensing unit to power the fan motor and drain pan heaters in each evaporator

Low voltage control wiring is run between the condensing unit and each evaporator for the evaporator sensor and liquid solenoid

A benefit for retrofit situations if there is existing control wiring that can be employed

In applications where there is limited evaporator accessibility (ex: controlled atmosphere rooms)

208-230 Volts

ModelLDV Compressor

Compressor

No.Fans

Cond.FanFLA

Independent (STD) System Power

Evap Powered From Condensing Unit

RLA LRA MCA MOP

Evap Max

Amps MCA MOP0752M6 2DL3R78KE 28.3 169 2 5.2 40.6 60 7.8 48.4 700762M6 2DA3R89KE 28.7 169 2 5.2 41.1 60 7.8 48.9 700802M6 3DA3R10ME 36.8 215 2 5.2 51.2 80 10.4 61.6 901002M6 3DB3R12ME 39.1 215 2 9.6 58.5 90 13.8 72.3 1101202M6 3DF3R15ME 43.2 275 2 9.6 63.6 100 13.8 77.4 1101502M6 3DS3R17ME 53.5 275 2 14.0 80.9 125 19.8 100.7 1502002M6 4DBNR20ME 59.7 308 2 14.0 88.6 125 21.0 109.6 1502502M6 4DHNR22ME 73.7 428 3 21.0 113.1 175 27.6 140.7 2003002M6 4DJNR28ME 84.4 470 3 21.0 126.5 200 39.6 166.1 2503502M6 6DHNR35ME 96.2 565 3 21.0 141.3 225 42.0 183.3 2504002M6 6DJNR40ME 126.9 594 4 28.0 186.6 300 56.0 242.6 3500602L6 3DA3F28KE 24.0 150 2 5.2 35.2 50 12.0 47.2 700752L6 3DB3F33KE 27.6 161 2 5.2 39.7 60 18.0 57.7 800902L6 3DF3F40KE 33.2 215 2 5.2 46.7 80 24.0 70.7 1001002L6 3DS3F46KE 37.2 215 2 5.2 51.7 80 24.0 75.7 1101202L6 4DBNF54KE 40.9 220 2 5.2 56.3 90 24.0 80.3 1101502L6 4DHNF63KE 47.2 278 2 9.6 68.6 110 24.6 93.2 1252202L6 4DJNF76KE 57.7 374 2 14.0 86.1 125 24.6 110.7 1502702L6 6DHNF93KE 72.4 450 2 14.0 104.5 175 24.6 129.1 2003002L6 6DJNF11ME 85.8 470 2 14.0 121.3 200 24.6 145.9 225

*230/6/60 MCA = Minimum Circuit Ampacity MOP = Maximum Overcurrnent Protection

Electrical Data Model LDV

18

460 Volts

ModelLDV Compressor

Compressor

No.Fans

Cond.FanFLA

Independent (STD) System Power

Evap Powered From Condensing Unit

RLA LRA MCA MOP

Evap Max

Amps MCA MOP0752M6 2DL3R78KE 12.4 85 2 2.6 18.1 30 3.0 21.1 300762M6 2DA3R89KE 12.6 85 2 2.6 18.4 30 3.0 21.4 300802M6 3DA3R10ME 17.9 106 2 2.6 25 40 4.7 29.7 451002M6 3DB3R12ME 17.9 106 2 4.8 27.2 45 6.9 34.1 501202M6 3DF3R15ME 21.2 138 2 4.8 31.3 50 6.9 38.2 501502M6 3DS3R17ME 26.0 138 2 7.0 39.5 60 9.9 49.4 702002M6 4DBNR20ME 29.9 154 2 7.0 44.4 70 10.5 54.9 802502M6 4DHNR22ME 36.9 214 3 10.5 56.6 90 13.8 70.4 1003002M6 4DJNR28ME 42.2 235 3 10.5 63.3 100 19.8 83.1 1253502M6 6DHNR35ME 48.1 283 3 10.5 70.6 110 21.0 91.6 1254002M6 6DJNR40ME 63.5 297 4 14.0 93.4 150 28.0 121.4 1750602L6 3DA3F28KE 10.8 77 2 2.6 16.1 25 6.0 22.1 300752L6 3DB3F33KE 14.1 83 2 2.6 20.2 30 9.0 29.2 400902L6 3DF3F40KE 15.0 106 2 2.6 21.4 35 12.0 33.4 451002L6 3DS3F46KE 16.7 106 2 2.6 23.5 40 12.0 35.5 501202L6 4DBNF54KE 20.4 110 2 2.6 28.1 45 12.0 40.1 601502L6 4DHNF63KE 23.6 139 2 4.8 34.3 50 12.3 46.6 702202L6 4DJNF76KE 28.8 187 2 7.0 43 70 12.3 55.3 802702L6 6DHNF93KE 36.2 225 2 7.0 52.3 80 12.3 64.6 1003002L6 6DJNF11ME 42.9 235 2 7.0 60.6 100 12.3 72.9 110

MCA = Minimum Circuit Ampacity MOP = Maximum Overcurrent Protection All selection require 3 phase power supply.

Independent Power Supplies for Condensing Units and Unit Coolers (Std)

Advantages

In this option, a separate high voltage power supply is run to each evaporator and the condensing unit

Low voltage control wiring is run between the condensing unit and each evaporator (including evaporator sensor, liquid solenoid and evaporator control contactor(s)

Electrician can run simple point-to-point power supplies without having to understand the control circuit wiring

Evaporator disconnect switch wiring is simplified (if required)

Refrigeration contractors can generally run the low voltage wiring with the refrigeration piping and make these wiring connections with a good understanding of the control circuit function

The condensing unit wire size and fusing requirements are minimized because they dont include a worst-case remote evaporator load

Lower cost installation solutionSingle Power Supply for Condensing Unit Providing Power to Unit Coolers

Advantages

In this option, a power supply is run to the condensing unit and high voltage wiring is run from the condensing unit to power the fan motor and drain pan heaters in each evaporator

Low voltage control wiring is run between the condensing unit and each evaporator for the evaporator sensor and liquid solenoid

A benefit for retrofit situations if there is existing control wiring that can be employed

In applications where there is limited evaporator accessibility (ex: controlled atmosphere rooms)

Independent Vs. Single Power Supplies

Electrical Data Model LDV

19

All selection require 3 phase power supply.

Hot Gas Unit Cooler Typical Factory Piping

ElectricalConnections(this side)

Note: Control contactorsmount under a coveron front of unit (not shown)

SuctionConnection

LiquidConnection

LiquidSolenoidValve

ThermostaticExpansionValve

CheckValves

CheckValve

SuctionP-Trap

Hot GasDShown

rain Pan

AirFlow

20

Medium Profile Hot Gas Defrost Unit Coolersfor use with Larkins Mohave Hot Gas Defrost System

MLG6 190 B G AVintage CodeMLG6 (6 FPI), MLG4 (4 FPI)

Capacity X 100Voltage:A = 115/1/60B = 208-230/1/60M = 460/1/60

Hot Gas System Evaporator

Nomenclature

Mounted and wired control contactors Schrader valve provided for suction pressure measurement Permanent split capacitor (PSC), thermally protected, lifetime-

lubricated motors in 115, 208-230 and 460 volts All internal panels have been isolated which provides for quiet unit operation Motors plug into wiring harness for easier servicing Factory mounted liquid line solenoid valve, TXV, and distributor nozzle Electric drain pan heaters Four and six FPI coils Single point power supply Suction P trap Insulated drain pan for low temp systems

Options UL approved totally enclosed motors EC motors (optional) available factory-installed or as a drop-in replacement through InterLink Commercial

Refrigeration Parts in 115/1/60, 208-230/1/60 voltages Available in stainless steel cabinets and/or drain pan* Copper fin or coil coatings (Electrofin and polyester) Mounted hot gas drain pan loop Evaporator control contactors mounted in condensing unit Insulated drain pan for medium temp systems

*aluminum inner drain pan with insulated outer stainless steel drain pan

Standard Features

E Solutions branded products and options are designed to exceed current energy and environmental standards . We have made a conscious commitment to developing environmentally innovative products that allow our customers to make energy efficient, eco-conscious choices . Products included in the E Solutions portfolio reduce costs, improve bottom lines, and enhance both equipment performance and service life . Choosing EC motors for this portion of the system decreases energy consumption and increases energy cost savings .

21

Medium Profile Unit Coolers

Model MLG6/MLG4 Hot Gas Defrost | 60 Hz

Hot Gas Defrost Model

BTUH 10F. TD

-20F. SST

Fan Data Motor Data (Total Amps) Electrical Supply Requirements

CFM No.Dia. (In.)

*Air Throw (Ft.)

HP

PSC Motor EC Motor 115V 208-230V 460V

Diffused (Std.)

Extended (Opt.)

115/1/60

208-230/1/60

460/1/60

115/1/60

208-230/1/60 MCA MOP MCA MOP MCA MOP

MLG6 (6 FPI MODELS)

MLG6 260 26,000 4,500 2 18 50 65 1/4 8.0 3.6 2.0 5.6 2.8 9.0 20 4.5 20 2.3 15MLG6 310 31,000 7,050 3 18 50 65 1/4 12.0 5.4 3.0 8.4 4.2 13.0 20 6.0 20 3.3 15MLG6 390 39,000 6,750 3 18 50 65 1/4 12.0 5.4 3.0 8.4 4.2 13.0 20 6.0 20 3.3 15MLG6 430 43,000 8,800 4 18 50 65 1/4 16.0 7.2 4.0 11.2 5.6 17.0 20 8.0 20 4.3 15MLG6 520 52,000 8,400 4 18 50 65 1/4 16.0 7.2 4.0 11.2 5.6 17.0 20 8.0 20 4.3 15

MLG4 (4 FPI MODELS)

MLG4 220 22,000 4,650 2 18 50 65 1/4 8.0 3.6 2.0 5.6 2.8 9.0 20 4.5 20 2.3 15MLG4 250 25,000 7,350 3 18 50 65 1/4 12.0 5.4 3.0 8.4 4.2 13.0 20 6.0 20 3.3 15MLG4 330 33,000 6,975 3 18 50 65 1/4 12.0 5.4 3.0 8.4 4.2 13.0 20 6.0 20 3.3 15MLG4 370 37,000 9,100 4 18 50 65 1/4 16.0 7.2 4.0 11.2 5.6 17.0 20 8.0 20 4.3 15MLG4 440 44,000 8,700 4 18 50 65 1/4 16.0 7.2 4.0 11.2 5.6 17.0 20 8.0 20 4.3 15

*Standard molded fan guards allow for extended air throw; optional wire guards promote air diffusion Air throw data based on 12-ft. high ceilings with no obstructions where velocity drops to 50 FPM Data appropriate for electric and hot gas defrost drain panMCA = Minimum Circuit Ampacity MOP = Maximum Overcurrent Protection

Model MLG6/MLG4 Hot Gas Defrost | 60 Hz

ModelSize

No. ofFans FPI

Connections (Inches) Approximate Net Weight

Lbs.Liquid SuctionMLG6 (6 FPI Models)

MLG6 260 2 6 1/2 1 3/8 ODF 216MLG6 310 3 6 1/2 1 3/8 ODF 242MLG6 390 3 6 1/2 1 3/8 ODF 269MLG6 430 4 6 1/2 1 5/8 ODF 312MLG6 520 4 6 1/2 1 5/8 ODF 345

MLG4 (4 FPI Models)MLG4 220 2 4 1/2 1 3/8 ODF 214MLG4 250 3 4 1/2 1 3/8 ODF 239MLG4 330 3 4 1/2 1 3/8 ODF 266MLG4 370 4 4 1/2 1 5/8 ODF 307MLG4 440 4 4 1/2 1 5/8 ODF 340

Capacity and Electrical Data

Physical Data

22

Medium Profile Unit Coolers

22-3/4"578 mm

15-1/2"390 mm

23 -1/4"590 mm

2-1/2"64 mm

24"608 mm

18-7/8"480 mm17-1/2"444 mm

Electrical Connection

End

Refrigerant Connection

End

Air Flow

6 FPI Models

4 FPI Models Dimensions

Hot Gas

MLG6

Hot Gas

MLG4

A B C D E F

in. mm in. mm in. mm in. mm in. mm in. mm

260 220 69-5/16 1,761 58-1/4 1,480 5-7/16 138

310 250 97-5/16 2,471 86-1/4 2,190 5-7/16 138

390 330 97-5/16 2,471 86-1/4 2,190 5-7/16 138

430 370 125-5/16 3,181 114-1/4 2,900 56 1,420 58-1/4 1,480 5-7/16 138

520 440 125-5/16 3,181 114-1/4 2,900 56 1,420 58-1/4 1,480 5-7/16 138NOTES: Evaporator mounting brackets accept up to 1/2" hanger rod Shown with optional molded fan guard

Dimensional Data

23

LHG6 850 B P G ALHG6 (6 FPI),LHG4 (4 FPI)

Capacity x 100(standard motor/fan blade)

Voltage CodeA = 115/1/60B = 208-230/1/60C = 208-230/3/60D = 460/3/60M = 460/1/60

Optional Motor CodeT = Totally Enclosed MotorsV = High CFM OptionP = 3 Phase Motor

Hot Gas System Evap.

Standard Features

Optional Features

Mill finish aluminum provides an attractive design and structurally sound cabinet

Thermo-Flex (with five-year limited warranty) is innovative, eliminates leaks, and reduces risk of refrigerant loss

850 rpm motors are quiet and reliable Liquid line solenoid wiring harness for faster installation Suction Schrader fitting for easier suction temperature measurement Captive fasteners on access panels for easy servicing no fumbling with loose bolts and nuts Long air throw is ideal for large warehouse and industrial applications Electric drain pan heater Insulated drain pan heater for low temp systems

High CFM motor and fan combinations (208-230/3/60 and 460/3/60) Totally enclosed motors (208-230/3/60 and 460/3/60) Long air throw collars for large warehouse and industrial applications More factory mounted features for easier field installation (Consult factory) Evaporator control contactors mounted in condensing unit Insulated drain pan for medium temp systems Mounted hot gas drain pan loop

Vintage

Nomenclature

Large Hot Gas Defrost Unit Coolersfor use with Larkins Mohave Hot Gas Defrost System

24

Large Unit Coolers

Hot Gas Defrost Capacity & Electrical Data - 60Hz

Note: TD = Temperature Difference = (Room temperature - saturated suction temperature)MCA = Minimum Circuit Ampacity MOP = Maximum Overcurrent Protection

Hot Gas Defrost Model

BTUH 10F. TD

-20F. SST

Fan Data Standard Motor DataElectrical Supply Requirements

Std. CFM No.

Dia. (In.)

Air Throw (Ft.)

HP ea.

Total Amps208-230V 460V

Std.with

Collar

208-230/1/60

208-230/3/60

460/1/60

460/3/60

Wired 1

Phase

Wired 3

Phase

Wired 1

Phase

Wired 3

Phase MCA MOPD MCA MOP6 FPI MODELS

LHG6 450 45,000 9,000 2 24 70 85 1/2+ 6.4 5.2 3.4 2.6 9.2 20 4.6 15

LHG6 550 55,000 9,000 2 24 70 85 1/2+ 6.4 5.2 3.4 2.6 9.2 20 4.6 15

LHG6 640 64,000 12,600 3 24 70 85 1/2+ 5.5 7.8 3.0 3.9 12.0 20 5.9 15

LHG6 740 74,000 12,600 3 24 70 85 1/2+ 5.5 7.8 3.0 3.9 12.0 20 5.9 15

LHG6 810 81,000 16,800 4 24 70 85 1/2+ 8.7 10.4 4.7 5.2 18.0 20 8.7 15

LHG6 950 95,000 16,800 4 24 70 85 1/2+ 8.7 10.4 4.7 5.2 18.0 20 8.7 15

LHG6 1020 102,000 20,700 3 30 100 115 1 13.8 6.9 18.0 25 8.7 15

LHG6 1200 120,000 20,700 3 30 100 115 1 13.8 6.9 18.0 25 8.7 15

LHG6 1390 139,000 24,300 3 30 100 115 1 1/2 19.8 9.9 21.5 40 10.7 20

LHG6 1650 165,000 26,550 3 30 120 140 1 1/2 21.0 10.5 22.8 40 11.4 20

LHG6 2120 212,000 35,400 4 30 120 140 1 1/2 28.0 14.0 29.9 45 14.9 25

4 FPI MODELSLHG4 400 40,000 9,400 2 24 70 85 1/2+ 6.4 5.2 3.4 2.6 9.2 20 4.6 15

LHG4 480 48,000 9,400 2 24 70 85 1/2+ 6.4 5.2 3.4 2.6 9.2 20 4.6 15

LHG4 560 56,000 13,200 3 24 70 85 1/2+ 5.5 7.8 3.0 3.9 12.0 20 5.9 15

LHG4 650 65,000 13,200 3 24 70 85 1/2+ 5.5 7.8 3.0 3.9 12.0 20 5.9 15

LHG4 710 71,000 17,600 4 24 70 85 1/2+ 8.7 10.4 4.7 5.2 18.0 20 8.7 15

LHG4 840 84,000 17,600 4 24 70 85 1/2+ 8.7 10.4 4.7 5.2 18.0 20 8.7 15

LHG4 890 89,000 21,600 3 30 100 115 1 13.8 6.9 18.0 25 8.7 15

LHG4 1050 105,000 21,600 3 30 100 115 1 13.8 6.9 18.0 25 8.7 15

LHG4 1220 122,000 25,200 3 30 100 115 1 1/2 19.8 9.9 21.5 40 10.7 20

LHG4 1440 144,000 27,600 3 30 120 140 1 1/2 21.0 10.5 22.8 40 11.4 20

LHG4 1860 186,000 36,800 4 30 120 140 1 1/2 28.0 14.0 29.9 45 14.9 25

Capacity Correction Factors for Electric and Hot Gas Defrost UnitsSaturated Suction Temperature F +20 -10 -20 -30 -40Saturated Suction Temperature C -7 -23 -29 -34 -40Multiply Capacity By 1.15 1.04 1.00 0.90 0.80

Data appropriate for electric and hot gas defrost drain pan.

25

Hot Gas Defrost High CFM Capacity & Electrical Data - 60Hz

High CFM models can handle external static pressure up to 1/2 of waterHigh CFM models are designed for operation below +15F S.S.T.CFM is at 0.0 external static pressure

Note: TD = Temperature Difference = (Room temperature - saturated suction temperature)MCA = Minimum Circuit Ampacity MOP = Maximum Overcurrent Protection

Capacity Correction Factors for Electric and Hot Gas Defrost UnitsSaturated Suction Temperature F +20 -10 -20 -30 -40Saturated Suction Temperature C -7 -23 -29 -34 -40Multiply Capacity By 1.15 1.04 1.00 0.90 0.80

Hot Gas Defrost Model

BTUH 10F. TD

-20F. SST

Fan Data Standard Motor DataElectrical Supply Requirements

Std. CFM No.

Dia. (In.)

Air Throw (Ft.)HP ea.

Total Amps 208-230V 460V

Std.with

Collar208-

230/3/60 460/3/60 MCA MOP MCA MOP6 FPI MODELS

LHG6 450*V 49,500 11,300 2 24 85 100 2 12.0 6.0 13.5 30 6.8 15

LHG6 550*V 60,500 11,300 2 24 85 100 2 12.0 6.0 13.5 30 6.8 15

LHG6 640*V 70,400 15,900 3 24 85 100 2 18.0 9.0 19.5 35 9.8 15

LHG6 740*V 81,400 15,900 3 24 85 100 2 18.0 9.0 19.5 35 9.8 15

LHG6 810*V 89,100 21,200 4 24 85 100 2 24.0 12.0 25.5 40 12.8 20

LHG6 950*V 104,000 21,200 4 24 85 100 2 24.0 12.0 25.5 40 12.8 20

LHG6 1020*V 107,100 23,300 3 30 110 130 3 24.6 12.3 26.7 45 13.3 25

LHG6 1200*V 126,000 23,300 3 30 110 130 3 24.6 12.3 26.7 45 13.3 25

LHG6 1390*V 146,000 27,200 3 30 110 130 3 24.6 12.3 26.7 45 13.3 25

LHG6 1650*V 174,000 29,700 3 30 130 150 3 24.6 12.3 26.7 45 13.3 25

LHG6 2120*V 223,000 39,600 4 30 130 150 3 32.8 16.4 34.9 50 17.4 25

4 FPI MODELSLHG4 400*V 42,000 12,200 2 24 85 100 2 12.0 6.0 13.5 30 6.8 15

LHG4 480*V 50,400 12,200 2 24 85 100 2 12.0 6.0 13.5 30 6.8 15

LHG4 560*V 58,800 17,000 3 24 85 100 2 18.0 9.0 19.5 35 9.8 15

LHG4 650*V 68,300 17,000 3 24 85 100 2 18.0 9.0 19.5 35 9.8 15

LHG4 710*V 74,600 22,600 4 24 85 100 2 24.0 12.0 25.5 40 12.8 20

LHG4 840*V 88,200 22,600 4 24 85 100 2 24.0 12.0 25.5 40 12.8 20

LHG4 890*V 91,200 23,800 3 30 110 130 3 24.6 12.3 26.7 45 13.3 25

LHG4 1050*V 107,600 23,800 3 30 110 130 3 24.6 12.3 26.7 45 13.3 25

LHG4 1220*V 125,000 32,800 3 30 110 130 3 24.6 12.3 26.7 45 13.3 25

LHG4 1440*V 147,000 30,600 3 30 130 150 3 24.6 12.3 26.7 45 13.3 25

LHG4 1860*V 190,000 40,800 4 30 130 150 3 32.8 16.4 34.9 50 17.4 25

Data appropriate for electric and hot gas defrost drain pan.

Large Unit Coolers

26

Large Unit Coolers

Physical Specifications - Hot Gas Defrost

Hot Gas Defrost

Model Size No. of Fans

Connections (Inches) Approx. Net Weight

(Lbs.)Liquid Suction Drain6 FPI MODELS

LHG6 450 2 5/8 OD 1-5/8 OD 1-1/4 FPT 320

LHG6 550 2 5/8 OD 1-5/8 OD 1-1/4 FPT 350

LHG6 640 3 5/8 OD 2-1/8 OD 1-1/4 FPT 458

LHG6 740 3 5/8 OD 2-1/8 OD 1-1/4 FPT 498

LHG6 810 4 5/8 OD 2-1/8 OD 1-1/4 FPT 597

LHG6 950 4 5/8 OD 2-1/8 OD 1-1/4 FPT 647

LHG6 1020 3 5/8 OD 2-1/8 OD 1-1/4 FPT 842

LHG6 1200 3 7/8 OD 2-1/8 OD 1-1/4 FPT 904

LHG6 1390 3 7/8 OD 2-1/8 OD 1-1/4 FPT 958

LHG6 1650 3 1-1/8 OD 2-5/8 OD 1-1/4 FPT 1,291

LHG6 2120 4 1-1/8 OD 2-5/8 OD 1-1/4 FPT 1,781

4 FPI MODELS

LHG6 400 2 5/8 OD 1-5/8 OD 1-1/4 FPT 317

LHG6 480 2 5/8 OD 1-5/8 OD 1-1/4 FPT 346

LHG6 560 3 5/8 OD 2-1/8 OD 1-1/4 FPT 453

LHG6 650 3 5/8 OD 2-1/8 OD 1-1/4 FPT 493

LHG6 710 4 5/8 OD 2-1/8 OD 1-1/4 FPT 590

LHG6 840 4 5/8 OD 2-1/8 OD 1-1/4 FPT 640

LHG6 890 3 5/8 OD 2-1/8 OD 1-1/4 FPT 833

LHG6 1050 3 7/8 OD 2-1/8 OD 1-1/4 FPT 894

LHG6 1220 3 7/8 OD 2-1/8 OD 1-1/4 FPT 947

LHG6 1440 3 1-1/8 OD 2-5/8 OD 1-1/4 FPT 1,276

LHG6 1860 4 1-1/8 OD 2-5/8 OD 1-1/4 FPT 1,761

27

Large Unit Coolers

Dimensions

AB

C26142414

215322912*

4916

G F

Figure 1.

678

RefrigerantPiping End

Accepts 12 Hanger Rod ElectricalEnd

8

Hot Gas Defrost Models Dimensions (Inches)

6 FPI 4 FPI Figure A B C F G

LHG6 450 LHG4 400 1 83-3/32 68-1/8 - 37-3/16 40-11/32

LHG6 550 LHG4 480 1 83-3/32 68-1/8 - 37-3/16 40-11/32

LHG6 640 LHG4 560 1 105-5/32 90-3/16 45-3/32 37-3/16 40-11/32

LHG6 740 LHG4 650 1 105-5/32 90-3/16 45-3/32 37-3/16 40-11/32

LHG6 810 LHG4 710 1 135-7/32 120-1/4 60-1/8 37-3/16 40-11/32

LHG6 950 LHG4 840 1 135-7/32 120-1/4 60-1/8 37-3/16 40-11/32

*Factory piping extends behind the unit cooler and may add up to 6 inches to this dimension

28

AB

CD

E352132

34

2334

32471641332*

7916

G F

Figure 2.

RefrigerantPiping End

ElectricalEnd

Accepts 58 Hanger Rod

Air Throw

Hot Gas Defrost Models Dimensions (Inches)6 FPI 4 FPI Fig. A B C D E F G

LHG6 1020 LHG4 890 2 135-13/32 120-9/32 40-3/32 80-3/16 44-1/2 50-5/16LHG6 1200 LHG4 1050 2 135-13/32 120-9/32 40-3/32 80-3/16 44-1/2 50-5/16LHG6 1390 LHG4 1220 2 135-13/32 120-9/32 40-3/32 80-3/16 50-7/32 55-13/16LHG6 1650 LHG4 1440 2 142-1/2 127-25/32 42-19/32 85-3/16 50-7/32 55-13/16

2 185-1/2 170-3/8 42-19/32 85-3/16 127-25/32 44-1/2 50-5/16LHG6 2120 LHG4 1860 2 185-1/2 170-3/8 42-19/32 85-3/16 127-25/32 50-7/32 56-1/4

Hot Gas Defrost Models

Standard Motor RPM

Standard HP Each

Air Throw

Air Throw with

Collar

Optional High CFM

Motor RPM

Optional HP

EachAir

Throw

Air Throw with

Collar6 FPI 4 FPI450 - 950 400 - 840 850 1/2+ 70 85 1750 2 80 100

1020 - 1390 890 - 1220 850 1 & 1-1/2 100 120 1750 3 115 1451650 - 2120 1440 - 1860 1140 1-1/2 120 145 1750 3 130 150+ Three Phase Motors are 1140 RPMAir throw data based on 30 ft. ceiling height with no obstructions where velocity drops to 50 FPM

Large Unit Coolers

Dimensions

*Factory piping extends behind the unit cooler and may add up to 6 inches to this dimension

29

REFRIGERATION OPERATION

The refrigeration operation of the hot gas system is very similar to a standard refrigeration system. An external thermostat is connected to the hot gas control board at the terminal block connections labeled T-Stat and C (for common). When the normally open contact inside the thermostat closes (a call for cooling), the hot gas control board responds by activating a series of solenoids and contactors (described below) in order to initiate and maintain a refrigeration cycle. Later, when the thermostat contact opens, the hot gas control board deactivates the solenoids in a preset manner in order to safely turn off the refrigeration process and maintain an Off condition.

At initial power up, the system defaults to the OFF mode for a minimum of two minutes. Following the two-minute hold off period, the control circuit examines the state of the thermostat input. If the thermostat input signal is activated (closed between T-Stat and C), the system begins the refrigeration startup process. Full refrigeration mode (or COOL mode) is achieved when the control board has activated the solenoids necessary to provide refrigerant flow between the evaporator(s) and the condensing unit (Suction Solenoid and Liquid Line Solenoid), activated the compressor contactor, deployed the appropriate control over the condenser fans, and turned on the evaporator fans.

Refrigerant Solenoid and Compressor Contactor Control: The Suction Solenoid is initially activated following the power-up two-minute hold off time. It is maintained in the ON state until a defrost cycle is initiated. The timing of the liquid line solenoid (LLS) activation is based upon the saturated suction temperature (SST) which is calculated from the suction pressure value. If the SST is greater than 15F, the compressor contactor is activated before the LLS is activated in order to decrease the suction pressure prior to startup. When the SST drops to -5F, the LLS is activated. If the SST does not fall to -5F within 2 minutes, Er12 is activated and the system goes to OFF mode.

If the SST is 15F or less, the LLS is activated immediately. When the SST rises to -10F for medium temperature applications or -20F for low temperature applications, the compressor contactor is activated. If the SST fails to rise in 2 minutes, ER11 is activated and the system goes to OFF mode.

When the thermostat signal is deactivated, the liquid line solenoid is turned off immediately. The compressor contactor will stay activated until the suction pressure falls below the pre-programmed cut out pressure. The compressor contactor and all condenser fan contactors will be deactivated simultaneously. The evaporator fans will continue running.

Compressor Contactor Control: Activation of the compressor contactor is coordinated with the activation of the Liquid Line Solenoid (liquid line solenoid). In order to protect the compressor from flooding during startup, the suction pressure is measured at the suction accumulator in order to determine the order and timing of the compressor contactor and liquid line solenoid activation. If the suction pressure is above 30 psig, the compressor is activated first in order to deplete the suction line of refrigerant. When the pressure falls below 20 psig, the liquid line solenoid is activated. If the suction pressure is below 30 psig, the liquid line solenoid is activated first. When the suction pressure rises above the pre-programmed cut in value, the compressor is activated. Condenser Fan Control: When the Condensing Unit Model is selected in the Program Review Menu; the program automatically activates the default Head Pressure Control Scheme.

Method: Pressure Fan Cycling (PRES) All fans Minimum condensing temperature: 65F The default ON and OFF settings are optimized to maximize energy efficiency while still providing adequate pressure for the thermostatic expansion valve(s) to work properly. The parameters are refrigerant specific. Fans are staged to minimize fluctuations in head pressure during operation.

During refrigeration operation, the hot gas controller monitors liquid pressure to determine if each fan should be ON or OFF.

These settings and other fan control options may be modified by turning on the Expert Mode (XPRT) in the Program Menu. See Program Review and Optional Controls for more information.

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Evaporator Fan Control: After initial power-up, the evaporator fans will be turned off. When the system initiates the first cooling cycle, the hot gas controller monitors the temperature value of the evaporator defrost termination sensor mounted on the evaporator suction headers. When the controller determines that the suction header has reached the refreeze setpoint, the evaporator fans will be activated. If there are two evaporators, the fans will be energized by the first sensor to achieve setpoint. Once activated, the evaporator fans will continue to run until either a defrost cycle is initiated, or if the system is placed in SERVICE mode.

Anti Short-Cycle Protection: During cooling mode, the control board is programmed to allow a minimum system ON time of 1 minute and a minimum OFF time of 2 minutes.

Pump Down

At the end of each cooling cycle, when the box temperature is met, the hot gas control system will pump down and turn off the compressor.

To pump down, the Liquid Line Solenoid(s) is deactivated and the compressor runs until the pressure measured at the suction accumulator falls below the pre-programmed cut out pressure value, or two minutes has elapsed. The compressor is then turned off until the start of the next cooling cycle. During the pump down process, the LED display will show PMPD.

Manual Pump down: A single pole, single throw switch is connected to the Service SW input on the hot gas control board. Activating this switch (closing the contact) will cause the system to pump down and shut off. While in Service mode, the evaporator fans will turn off. Note that the system will not restart until the switch contact has been opened. The hot gas controller will display SERV while in Service mode.

The system can also be pumped-down by pressing the SERVICE button twice. To restart the system, press the CLEAR button.

31

DEFROST OPERATION

Defrost Timing/Schedule Programming

The hot gas controller can be programmed with up to 12 defrost start times. The Program Review menu section describes the process to program or delete a valid start time. Note that clearing a start time by pressing CLEAR and the ENTER will disable all start times following the one being cleared. There must be 30 minutes of elapsed time following a start of defrost before another defrost can be scheduled. A defrost cycle can be initiated manually at any time.

Force Defrost Manually

To manually force the start of a defrost-cycle, press the FORCE DEFROST button. If the system is in COOL mode, the system will pump down and go to the off mode before the defrost process is started.

Defrost Process

The defrost process has four steps: Pre-defrost (DEF1) pressure equalization, Defrost operation (DEF2), Post-defrost (DEF3) pressure equalization and drain down, and Refreeze (FREZ).

DEF1:Pre-defrost, or defrost step 1, always follows activation of Off mode. If the system is in Cool mode when the defrost cycle is activated, the control will pump down and go to Off mode before activating pre-defrost.

The purpose of DEF1 is to equalize the refrigerant pressures between the condensing unit receiver and the evaporator(s). This is accomplished by first deactivating the evaporator fans, and the suction solenoid. Next the Bypass Solenoid and the evaporator Pan Heater contactor are activated. The time duration of the pressure equalization is programmed as EQUT in the PROGRAM REVIEW menu.

DEF2:After the equalization time has elapsed, the Bypass Solenoid is deactivated. The Defrost Solenoid is activated 1 second later, followed by the 3-

way valve solenoid 1 second after that. Next, the pressure regulator control algorithm is enabled. The initial position is full open, but it quickly makes adjustments in order to stabilize the pressures and temperatures seen at the inlet of the suction accumulator.

The compressor contactor turns on at the same time that the pressure regulator is activated. The ambient temperature is measured, and a determination is made of how many condenser fans should be operating. The correct number of condenser fans is activated at the same time as the compressor contactor.

During the DEF2 operation, the pressure regulator continues to maintain the appropriate volume of refrigerant flow through the system based upon the current ambient conditions, the refrigerant type, and the type of cooling application.

Termination of defrost is accomplished by either both evaporators reaching their target termination temps, or the liquid pressure measured between the receiver and the condenser coil reaching its target pressure, or the pre-programmed fail safe time.

When one of the termination factors is realized, the compressor, condenser fan(s), and the defrost solenoid are turned off. The 3-way valve and the Pan heaters are left on. The pressure regulator is activated to 100% open, and DEF3 begins.

DEF3:Post-defrost has two purposes. The first is the transfer of high pressure refrigerant at the evaporator back to the condenser receiver by way of the pressure regulator. The pressure regulator is open 100% during this step. The second purpose is drain down time for the warm evaporators. This allows the water that was melted off of the coil to drain out of the evaporator drain pan. The time duration for this step is identical to the DEF1 equalization time.

After the completion of the delay time period, the 3-way valve and the pan heater contactor are turned

32

off. One second later the suction solenoid is turned on, and then one second after that the compressor turns on. The condenser fan control algorithm is also enabled. When the pressure measured at the suction sensor falls below 20 psig, the liquid line solenoid is activated and the process step changes to refreeze.

FREZ:The refreeze step is identical to cooling mode except that the evaporator fans are turned off. This is to allow the evaporator coils to freeze any remaining water that might be left over from the drain down step so that when the fans turn on, the

water will not be sprayed into the refrigerated space. When the evaporator reaches the refreeze setpoint, the fans turn on and the system begins a cooling cycle. If the thermostat is satisfied, or deactivated, the system will run a cooling cycle for two minutes and then pump down and shut off.

After the compressor is energized, the suction stop valve may be pulsed to limit the suction pressure at the compressor.

Mohave Hot Gas Defrost Cycle Diagrams Black = Piping InactiveGray = Piping Active

33

Mohave Hot Gas Defrost Cycle Diagrams Black = Piping InactiveGray = Piping Active

34

Notes

35

Notes

36

Since product improvement is a continuing effort, we reserve the right to make changes in specifications without notice.

A Brand of Heatcraft Refrigeration Products, LLC2175 West Park Place Blvd. Stone Mountain, GA 30087

800.848.9889

www.heatcraftrpd.com

For more information on Larkin products, contact your Larkin Sales Representative

or visit us at www.heatcraftrpd.com