Bohn BDV-0602L6 Service Manual

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Technical Guide

BNHGDTB

March 2011

Replaces BN-HGDTB, July 2009

Table of Contents

Overview ......................................................................................2

System Features .........................................................................3

Condensing Unit ................................................................. 4-13

Mohave Hot Gas Defrost Quick Reference .......................5

Mohave Hot Gas Unit Cooler Typical Factory Piping . 14

Medium Prole Evaporator ...........................................15-17

Large Unit Cooler .............................................................18-23

Hot Gas Defrost Systems ...............................................24-28

Refrigeration and Defrost Operation ........................ 29-31

Mohave Hot Gas Defrost Cycle Diagrams ............... 32, 33

Overview

The Mohave™ advanced hot gas defrost refrigeration system with controller utilizes hot gas to greatly reduce defrost times and operates in all outdoor ambient temperatures.* This leads to increased energy eciency 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.

*Tested to -20°F ambient.

Hot Gas Control Board Features & Benets

• The Mohave 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 notication

• Signicant energy savings over electric defrost systems

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 ecient, 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 eciently, resulting in energy savings. To further increase energy savings, EC motors are available for some evaporator models.

Main System Features

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 eciency Copeland Discus® compressors with poe oil

• Thermally protected permanently lubricated ball bearing condenser fan motor(s)

• Receivers are sized for sucient pumpdown capacity with inlet and outlet service valves

• Cabinet is constructed from painted galvanized steel

• Replaceable core liquid line lter drier

• Replaceable core suction lter

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 loop optional)

• Mounted and wired control contactors

Electric Vs. Hot Gas Drain Pan

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

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

• Lower cost solution

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

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

Vertical Air Discharge Condensing Unit

The BDV Outdoor Discus Condensing Unit features 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 ve year warranty against condenser tube sheet and center support leaks

• Designed for use with R-404A, R-507, R-22

• 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 eciency 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 sucient pump down 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 lter drier and sight glass

• Replaceable core suction lter

• 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

• Evaporator control contactors mounted in condensing unit

Nomenclature

BDV 150 2 L 6 C

BDV – Vertical Air Discharge

Nominal Horsepower

060 – 6 HP 075 – 7.5 HP 076 – 7.5 HP 080 – 8 HP 090 – 9 HP 100 – 10 HP

120 – 12 HP 150 – 15 HP 200 – 20 HP 250 – 25 HP 300 – 30 HP 350 – 35 HP 400 – 40 HP

Hot Gas Defrost – 2

Refrigerant

6 – R-404A or R-507 or R-22

Application (SST)

L – Low (0°F to -40°F) M – Medium (30°F to -10°F)

Electrical Characteristics

C – 208-230/3/60 D – 460/3/60 K – 230/3/60 E – 575/3/60

The Mohave Controller

• Fast, dependable, and ecient positive defrost of evaporators

• Five to ten minute defrost times in most applications

• Will operate eciently in all outdoor ambient conditions*

• Signicant energy savings over electric defrost systems

• Highest levels of product integrity through more stable box temperatures

*Tested to -20°F ambient.

Mohave Hot Gas Defrost Controller Quick Reference Guide

Control Buttons

Program Review: Review or Change the Program Settings

Enter: Accepts changes into memory

Monitor: View Current Operating Conditions of the System

Reset Time: Resets the time clocks of the microprocessor to 0

Program

Review

Clear/

Test

Enter

Selection

Knob

Monitor

Force

Service

Reset

Time

Force

Defrost

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 Parameters

Force Service: Press this button twice to cause the system to pump down and remain o until the Clear button is pressed

Force Defrost: System will pump down and begin a defrost cycle. This will not aect the normally scheduled defrosts

Service Switch

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

Operating Modes

Mode Description

OFF Compressor O

COOL Compressor On in Cooling Normal Cooling Operation

PMPD System in Pump Down Mode

SERV Service Mode, System is O

DELY Timed Delay

DEF1 Defrost Stage 1

Pre-Defrost or Bypass Mode

DEF2 Defrost Stage 2

Defrost Mode

DEF3 Defrost Stage 3

Post Defrost Equalization or Drain Down Mode

FREZ Refreeze Mode

TEST Test Mode

SERV Service Mode

EVAC Evacuation Mode

Electrical Box Features

Condenser Fan

Contactors

Compressor Contactor

Control Circuit

Transformers

Electrical Service

Knockouts

Typical Internal Piping

Control Circuit Fuses & Service Switch

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

Oil Pressure Switch

ServiceMate™ Diagnostic Module

Mohave Hot Gas System Controller

Main Power Block

Replaceable Core Liquid Filter Drier

3-Way Valve

Electronic Pressure Regulator

Pre-bent Internal Piping Prevents Braze Joints

Defrost Solenoid

Replaceable Core Suction Filter

Bypass Solenoid

Suction Stop Solenoid

Liquid Receiver with Service Valves Allow Charge Isolation

Easily Accessible Discus Compressor

Galvanized Steel Base with Rigging Points

Suction Accumulator

Performance Data • Model BDV • Medium Temperature

Saturated Suction Temperature °F

R-404A or R-507

Model BDV

0752M6

0762M6

0802M6

1002M6

1202M6

1502M6

2002M6

2502M6

3002M6

3502M6

4002M6

Ambient Temp. °F

90 70,900 64,300 57,900 51,700 45,900

95 67,600 61,300 55,300 49,400 43,800

100 64,500 58,500 52,800 47,100 41,600

110 58,300 53,000 47,700 42,400 37,400

90 80,300 73,400 66,600 60,000 53,600

95 76,800 70,100 63,500 57,300 51,000

100 73,100 66,800 60,700 54,600 48,700

110 66,200 60,600 54,900 49,200 43,700

90 94,300 86,000 77,900 70,200 62,700

95 90,500 82,600 74,900 67,500 60,000

100 86,800 79,200 71,800 64,400 57,500

110 79,000 72,400 65,700 59,000 52,500

90 114,800 104,900 95,100 85,800 76,800

95 110,100 100,600 91,300 82,200 73,400

100 105,300 96,200 87,400 78,600 70,000

110 95,700 87,500 79,300 71,200 63,200

90 138,300 126,500 115,100 103,800 92,800

95 132,500 121,200 110,300 99,400 88,800

100 126,600 116,100 105,400 95,000 84,800

110 115,100 105,400 95,700 86,200 76,600

90 153,300 140,300 127,600 115,000 102,900

95 146,800 134,300 122,200 110,200 98,500

100 140,300 128,700 116,900 105,300 94,000

110 127,500 116,800 106,100 95,600 85,100

90 162,500 147,300 132,900 119,300 106,000

95 154,200 140,100 126,500 113,200 100,400

100 146,400 133,100 119,900 107,100 94,800

110 131,000 118,600 106,500 94,700 83,300

90 212,900 193,000 174,000 156,200 139,400

95 203,800 184,600 166,500 149,000 132,800

100 194,700 176,100 158,600 141,800 126,200

110 176,800 159,600 143,100 127,400 112,600

90 249,200 227,500 206,500 185,600 165,500

95 238,100 217,300 197,200 177,100 157,800

100 226,900 207,400 187,900 168,600 150,000

110 205,000 186,900 169,100 151,500 134,500

90 312,300 285,400 259,300 234,400 209,600

95 297,800 272,700 248,300 223,600 200,000

100 284,000 260,400 236,600 212,900 189,800

110 256,900 235,000 213,200 191,400 169,900

90 359,700 329,700 300,600 272,000 244,200

95 345,100 315,900 287,400 259,800 232,900

100 329,600 301,500 274,300 247,500 221,600

110 298,200 272,700 247,400 222,600 198,600

25°F

BTUH

20°F

BTUH

15°F

BTUH

10°F

BTUH

5°F

BTUH

Performance Data • Model BDV • Medium Temperature

Saturated Suction Temperature °F

R-22

Model BDV

0752M6

0762M6

0802M6

1002M6

1202M6

1502M6

2002M6

2502M6

3002M6

3502M6

4002M6

Ambient Temp. °F

90 68,500 61,900 55,600

95 66,100 59,700 53,600

100 63,700 57,400 51,500

110 58,900 53,000 47,300

90 76,600 69,400 62,600

95 73,700 66,800 60,300

100 71,100 64,300 57,900

110 65,600 59,200 53,200

90 93,000 84,200 75,900

95 89,900 81,300 73,200

100 86,800 78,400 70,400

110 80,600 72,600 65,000

90 111,900 101,500 91,400

95 108,200 98,000 88,100

100 104,600 94,500 84,800

110 97,100 87,500 78,200

90 125,800 113,600 102,000

95 121,700 109,700 98,300

100 117,500 105,700 94,700

110 109,000 97,900 87,400

90 142,400 128,000 114,600

95 137,600 123,700 110,500

100 132,800 119,300 106,500

110 123,500 110,600 98,500

90 157,500 143,000 129,100

95 151,800 137,500 123,900

100 146,200 132,100 118,700

110 135,000 121,400 108,400

90 205,000 186,900 169,600

95 198,100 180,100 163,200

100 191,000 173,300 156,800

110 176,700 159,900 144,000

90 241,500 219,600 198,300

95 233,500 211,800 190,900

100 225,200 203,900 183,500

110 208,500 188,200 168,800

90 295,100 268,700 243,200

95 285,300 259,000 234,100

100 274,900 249,400 225,000

110 254,200 230,100 207,100

90 342,300 312,700 284,600

95 331,200 302,100 274,700

100 320,100 291,600 264,800

110 297,900 270,800 244,900

25°F

BTUH

20°F

BTUH

15°F

BTUH

Performance Data • Model BDV • Low Temperature

Saturated Suction Temperature °F

R-404A or R-507

Model BDV

Ambient Temp. °F

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

0°F

BTUH

-10°F

BTUH

-15°F

BTUH

-20°F

BTUH

-30°F BTUH

-40°F

BTUH

0602L6

0752L6

0902L6

1002L6

1202L6

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

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

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

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

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

1502L6

2202L6

2702L6

3002L6

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

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

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

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

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

Specications and Dimensions • Model BDV

Model

BDV Compressor

0752M6

0762M6

0802M6

1002M6

1202M6

1502M6

2002M6

2502M6

3DA3A075E 2 24” 5/8 1-5/8 93 / 81 A 1650

3DB3A100E 2 26” 5/8 1-5/8 93 / 81 B 1725

3DF3A120E 2 26” 7/8 2-1/8 93 / 81 B 1750

3DS3A150E 2 30” 7/8 2-1/8 142 / 123 C 1780

4DA3A200E 2 30” 7/8 2-1/8 142 / 123 C 1860

4DH3A250E 3 30” 1-1/8 2-1/8 142 / 123 D 1950

Condenser

Fan Data Connections

No.

Fans Dia. Liquid Suction

2DL3-075E 2 24” 5/8 1-3/8 93 / 81 A 1550

2DA3-075E 2 24” 5/8 1-3/8 93 / 81 A 1550

Receiver

(90% Full)

R-22/R404A

Lbs.

Dim. Info.

See Figure

Approx.

Net

Weight

Lbs.

3002M6

3502M6

4002M6

0602L6

0752L6

0902L6

1002L6

1202L6

1502L6

2202L6

4DJ3A300E 3 30” 1-1/8 2-1/8 216 / 188 D 1950

6DH3A350E 3 30” 1-1/8 2-1/8 216 / 188 D 2800

6DJ3A400E 4 30” 1-1/8 2-1/8 216 / 188 E 3000

3DA3A060E 2 24” 5/8 1-3/8 81 A 1600

3DB3A075E 2 24” 5/8 1-3/8 81 A 1600

3DF3A090E 2 24” 5/8 1-5/8 81 A 1650

3DS3A100E 2 24” 5/8 1-5/8 81 A 1650

4DA3A101E 2 24” 5/8 1-5/8 81 A 1700

4DL3A150E 2 26” 7/8 2-1/8 81 B 1850

4DT3A220E 2 30” 7/8 2-1/8 81 C 2120

2702L6

3002L6

6DL3A270E 2 30” 1-1/8 2-1/8 123 C 2180

6DT3A300E 2 30” 1-1/8 2-1/8 123 C 2200

Dimensions (Inches) • Model BDV

1.76 FRAME C/L

55.5

1.76 FRAME C/L

O 2.50 K.O.

44.5

44.50

6.66

6.64

O 1.38 X 1.75 K.O.

10.14

8.4 6

4.03

O 1.38 X 1.75 K.O.

10.14

8.46

4.02

11.58

15.00

O 3.00

99.3 4

LIQUID

109.48

SUCTION

99.2 2 LIQUID

109.57

SUCTION

120

144.00

15.00

6.56

LIQUID

7.4 1

LIQUID

9.27

SUCTION

9.70

SUCTION

57.5

55.5

1.76 FRAME C/L

O 2.50 K.O.

1.76 FRAME C/L

O 2.50 K.O.

1.76 FRAME C/L

O 2.50 K.O.

44.7

44.5

10.46

6.73

6.66

8.46

6.66

O 1.38 X 1.7 5 K.O.

13.58

12.14

4.10

10.14

8.4 6

4.03

O 1.38 X 1.75 K.O.

11.58

10.14

4.03

15.00

11.58

O 3.00

15.00

99.50 LIQUID

125.00

15.00

O 3.00

142.73

SUCTION

99.50 LIQUID

O 3.00

142.75 SUCTION

99.34

LIQUID

142.74

SUCTION

280.0 5

225.67

170.68

9.41

LIQUID

11.70

LIQUID

15.00

LIQUID

15.00

7.4 1

9.70

SUCTION

7.41

LIQUID

15.00

Electrical Data • Model BDV

208-230 Volts

Independent (STD)

Compressor

System Power

Cond.

Model

BDV Compressor

0752M6 2DL3-075E 28.3 169 2 5.2 40.6 60 7.8 48.4 70

0762M6 2DA3-075E 28.7 169 2 5.2 41.1 60 7.8 48.9 70

0802M6 3DA3A075E 36.8 215 2 5.2 51.2 80 10.4 61.6 90

1002M6 3DB3A100E 39.1 215 2 9.6 58.5 90 13.8 72.3 110

1202M6 3DF3A120E 43.2 275 2 9.6 63.6 100 13.8 77.4 110

1502M6 3DS3A150E 53.5 275 2 14.0 80.9 125 19.8 100.7 150

2002M6 4DA3A200E 59.7 308 2 14.0 88.6 125 21.0 109.6 150

2502M6 4DH3A250E 73.7 428 3 21.0 113.1 175 27.6 140.7 200

3002M6 4DJ3A300E 84.4 470 3 21.0 126.5 200 39.6 166.1 250

3502M6 6DH3A350E 96.2 565 3 21.0 141.3 225 42.0 183.3 250

4002M6 6DJ3A400E 126.9 594 4 28.0 186.6 300 56.0 242.6 350

0602L6 3DA3A060E 24.0 150 2 5.2 35.2 50 12.0 47.2 70

0752L6 3DB3A075E 27.6 161 2 5.2 39.7 60 18.0 57.7 80

0902L6 3DF3A090E 33.2 215 2 5.2 46.7 80 24.0 70.7 100

1002L6 3DS3A100E 37.2 215 2 5.2 51.7 80 24.0 75.7 110

1202L6 4DA3A101E 40.9 220 2 5.2 56.3 90 24.0 80.3 110

1502L6 4DL3A150E 47.2 278 2 9.6 68.6 110 24.6 93.2 125

2202L6 4DT3A220E 57.7 374 2 14.0 86.1 125 24.6 110.7 150

2702L6 6DL3A270E 72.4 450 2 14.0 104.5 175 24.6 129.1 200

3002L6 6DT3A300E 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

RLA LRA MCA MOP

No.

Fans

Fan FLA

Evap Powered From

Condensing Unit

Evap

Max

Amps MCA MOP

Independent Vs. Single Power Supplies

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

• 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)

Single Power Supply for Condensing Unit Providing Power to Unit Coolers

• 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

Advantages

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

• Evaporator disconnect switch wiring is simplied (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 don’t include a worst-case remote evaporator load

• Lower cost installation solution

Advantages

• A benet for retrot situations if there is existing control wiring that can be employed

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

Electrical Data • Model BDV

460 Volts

Independent (STD)

Compressor

System Power

Cond.

Model

BDV Compressor

0752M6 2DL3-075E 12.4 85 2 2.6 18.1 30 3.0 21.1 30

0762M6 2DA3-075E 12.6 85 2 2.6 18.4 30 3.0 21.4 30

0802M6 3DA3A075E 17.9 106 2 2.6 25 40 4.7 29.7 45

1002M6 3DB3A100E 17.9 106 2 4.8 27.2 45 6.9 34.1 50

1202M6 3DF3A120E 21.2 138 2 4.8 31.3 50 6.9 38.2 50

1502M6 3DS3A150E 26.0 138 2 7.0 39.5 60 9.9 49.4 70

2002M6 4DA3A200E 29.9 154 2 7.0 44.4 70 10.5 54.9 80

2502M6 4DH3A250E 36.9 214 3 10.5 56.6 90 13.8 70.4 100

3002M6 4DJ3A300E 42.2 235 3 10.5 63.3 100 19.8 83.1 125

3502M6 6DH3A350E 48.1 283 3 10.5 70.6 110 21.0 91.6 125

4002M6 6DJ3A400E 63.5 297 4 14.0 93.4 150 28.0 121.4 175

0602L6 3DA3A060E 10.8 77 2 2.6 16.1 25 6.0 22.1 30

0752L6 3DB3A075E 14.1 83 2 2.6 20.2 30 9.0 29.2 40

0902L6 3DF3A090E 15.0 106 2 2.6 21.4 35 12.0 33.4 45

1002L6 3DS3A100E 16.7 106 2 2.6 23.5 40 12.0 35.5 50

1202L6 4DA3A101E 20.4 110 2 2.6 28.1 45 12.0 40.1 60

1502L6 4DL3A150E 23.6 139 2 4.8 34.3 50 12.3 46.6 70

2202L6 4DT3A220E 28.8 187 2 7.0 43 70 12.3 55.3 80

2702L6 6DL3A270E 36.2 225 2 7.0 52.3 80 12.3 64.6 100

3002L6 6DT3A300E 42.9 235 2 7.0 60.6 100 12.3 72.9 110

MCA = Minimum Circuit Ampacity MOP = Maximum Overcurrent Protection

RLA LRA MCA MOP

No.

Fans

Fan FLA

All selection require 3 phase power supply.

Evap Powered From

Condensing Unit

Evap

Max

Amps MCA MOP

Independent Vs. Single Power Supplies

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

• 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)

Single Power Supply for Condensing Unit Providing Power to Unit Coolers

• 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

Advantages

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

• Evaporator disconnect switch wiring is simplied (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 don’t include a worst-case remote evaporator load

• Lower cost installation solution

Advantages

• A benet for retrot situations if there is existing control wiring that can be employed

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

Hot Gas Unit Cooler Typical Factory Piping

Note: Control contactors

mount under a cover

Electrical Connections (this side)

on front of unit (not shown)

Air Flow

Suction Connection

Liquid Connection

Liquid Solenoid Valve

Check Valve

Suction P-Trap

Hot Gas D

rain Pan

Shown

Thermostatic Expansion Valve

Check Valves

Medium Prole Hot Gas Defrost Unit Coolers for use with the Bohn Mohave Hot Gas Defrost System

Standard Features

• 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 on 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 n or coil coatings (Electron, and BohnGuard™)

• 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

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 ecient, 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.

Nomenclature

BMG (6 FPI), BMF (4 FPI)

Capacity X 100

BMG 190 B G A

Voltage:

A = 115/1/60 B = 208-230/1/60 M = 460/1/60

Vintage Code

Hot Gas System Evaporator

Medium Prole Unit Coolers

Capacity and Electrical Data

Models BMG/BMF 60 Hz.

BTUH

Hot Gas

Defrost

Model

BMG 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 15

BMG 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 15

BMG 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 15

BMG 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 15

BMG 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

BMF 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 15

BMF 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 15

BMF 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 15

BMF 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 15

BMF 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 diusion † 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 pan MCA = Minimum Circuit Ampacity MOP = Maximum Overcurrent Protection

10°F.

-20°F. SST

CFM

Fan Data Motor Data (Total Amps) Electrical Supply Requirements

No.

*†Air Throw (Ft.)

Dia.

Diused

(In.)

(Std.)

Extended

(Opt.)

BMG (6 FPI MODELS)

BMF (4 FPI MODELS)

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

115/ 1/60

208230/ 1/60

460/ 1/60

115/ 1/60

208230/ 1/60

MCA MOP MCA MOP MCA MOP

††

Physical Data

Hot Gas Defrost Physical Data

Model

BMG 260 2 6 1/2 1-3/8 ODF 216

BMG 310 3 6 1/2 1-3/8 ODF 242

BMG 390 3 6 1/2 1-3/8 ODF 269

BMG 430 4 6 1/2 1-5/8 ODF 312

BMG 520 4 6 1/2 1-5/8 ODF 345

BMF 220 2 4 1/2 1-3/8 ODF 214

BMF 250 3 4 1/2 1-3/8 ODF 239

BMF 330 3 4 1/2 1-3/8 ODF 266

BMF 370 4 4 1/2 1-5/8 ODF 307

BMF 440 4 4 1/2 1-5/8 ODF 340

No. of

Fans FPI

MLG6 (6 FPI Models)

MLG4 (4 FPI Models)

Connections (Inches) Approximate

Net Weight

(lbs.)Liquid Suction

Medium Prole Unit Coolers

Dimensional Data

18-7/8"

480 mm

17-1/2"

444 mm

Air

Flow

Refrigerant

Connection

End

608 mm

2-1/2"

64 mm

24"

15-1/2"

390 mm

22-3/4"

578 mm

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

6 FPI

Models

BMG

BMG260

BMG310

BMG390

BMG430

BMG520

NOTE: Evaporator mounting brackets accept up to 1/2" hanger rod

4 FPI

Models

Hot

Gas

Hot Gas

BMF

BMF220 67-5/16 1,710 58-1/4 1,480 - - - - - - 4-15/16 125

BMF250 95-5/16 2,420 86-1/4 2,190 - - - - - - 4-15/16 125

BMF330 95-5/16 2,420 86-1/4 2,190 - - - - - - 4-15/16 125

BMF370 123-5/16 3,130 114-1/4 2,900 56 1,420 58-1/4 1,480 - - 4-15/16 125

BMF440 123-5/16 3,130 114-1/4 2,900 56 1,420 58-1/4 1,480 - - 4-15/16 125

A B C D E F

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

Dimensions

23 -1/4"

590 mm

Electrical

Connection

End

Large Hot Gas Defrost Unit Coolers for use with the Bohn Mohave Hot Gas Defrost System

Standard Features

• Mill nish aluminum provides an attractive design and structurally sound cabinet

• Thermo-Flex (with ve-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 tting for easier suction temperature measurement

• Captive fasteners on access panels for easy servicing

• Long air throw is ideal for large warehouse and industrial applications

• Electric drain pan heater

• Insulated drain pan heater for low temp systems

Optional Features

• 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 eld installation (Consult factory)

• Evaporator control contactors mounted in condensing unit

• Insulated drain pan for medium temperature systems

• Mounted hot gas drain pan loop

Nomenclature

BHG 850 B P G A

BHG (6 FPI), F (4 FPI)

Optional Motor Code

T = Totally Enclosed Motors V = High CFM Option P = 3 Phase Motor

Vintage

Hot Gas System Evap.

Capacity x 100

(standard motor/fan blade)

Voltage Code

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

Large Unit Coolers

Hot Gas Defrost Capacity & Electrical Data - 60Hz.

Fan Data Standard Motor Data

Dia. (In.)

Air Throw (Ft.)

with

Std.

Collar

208-230/1/60

Wired

Phase

6 FPI MODELS

4 FPI MODELS

— 19.8 — — 9.9 21.5 40 10.7 20

BTUH

Hot Gas Defrost

Model

BHG 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

BHG 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

BHG 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

BHG 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

BHG 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

BHG 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

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

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

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

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

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

BHF 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

BHF 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

BHF 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

BHF 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

BHF 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

BHF 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

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

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

BHF 1220 122,000 25,200 3 30 100 115 1-1/2 —

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

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

†

Data appropriate for electric and hot gas defrost drain pan

10°F.

-20°F. SST

Std.

CFM No.

Total Amps

208-

230/3/60

460/1/60

Wired

Phase

460/3/60

Phase MCA MOPD MCA MOP

Electrical Supply

Requirements

208-230V 460V

†

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

Capacity Correction Factors for Electric and Hot Gas Defrost Units

Saturated Suction Temperature °F +20 -10 -20 -30 -40

Saturated Suction Temperature °C -7 -23 -29 -34 -40

Multiply Capacity By 1.15 1.04 1.00 0.90 0.80

Large Unit Coolers

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

BTUH

10°F.

Hot Gas

Defrost

Model

BHG 450*V 49,500 11,300 2 24 85 100 2 12.0 6.0

BHG 550*V 60,500 11,300 2 24 85 100 2 12.0 6.0

BHG 640*V 70,400 15,900 3 24 85 100 2 18.0 9.0

BHG 740*V 81,400 15,900 3 24 85 100 2 18.0 9.0

BHG 810*V 89,100 21,200 4 24 85 100 2 24.0 12.0

BHG 950*V 104,000 21,200 4 24 85 100 2 24.0 12.0

BHG 1020*V 107,100 23,300 3 30 110 130 3 24.6 12.3

BHG 1200*V 126,000 23,300 3 30 110 130 3 24.6 12.3

BHG 1390*V 146,000 27,200 3 30 110 130 3 24.6 12.3

BHG 1650*V 174,000 29,700 3 30 130 150 3 24.6 12.3

BHG 2120*V 223,000 39,600 4 30 130 150 3 32.8 16.4

BHF 400*V 42,000 12,200 2 24 85 100 2 12.0 6.0

BHF 480*V 50,400 12,200 2 24 85 100 2 12.0 6.0

BHF 560*V 58,800 17,000 3 24 85 100 2 18.0 9.0

BHF 650*V 68,300 17,000 3 24 85 100 2 18.0 9.0

BHF 710*V 74,600 22,600 4 24 85 100 2 24.0 12.0

BHF 840*V 88,200 22,600 4 24 85 100 2 24.0 12.0

BHF 890*V 91,200 23,800 3 30 110 130 3 24.6 12.3

BHF 1050*V 107,600 23,800 3 30 110 130 3 24.6 12.3

BHF 1220*V 125,000 32,800 3 30 110 130 3 24.6 12.3

BHF 1440*V 147,000 30,600 3 30 130 150 3 24.6 12.3

BHF 1860*V 190,000 40,800 4 30 130 150 3 32.8 16.4

†

Data appropriate for electric and hot gas defrost drain pan. Note: TD = Temperature Dierence = (Room temperature - saturated suction temperature)

MCA = Minimum Circuit Ampacity MOP = Maximum Overcurrent Protection

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

-20°F. SST

Std.

CFM No.

Fan Data Standard Motor Data

Dia. (In.)

Air Throw (Ft.)

with

Std.

Collar 208-230/3/60 460/3/60

6 FPI MODELS

4 FPI MODELS

Total Amps

Electrical Supply

Requirements

208-230V 460V

MCA MOP MCA MOP

13.5 30 6.8 15

19.5 35 9.8 15

25.5 40 12.8 20

26.7 45 13.3 25

34.9 50 17.4 25

13.5 30 6.8 15

19.5 35 9.8 15

25.5 40 12.8 20

26.7 45 13.3 25

34.9 50 17.4 25

†

Capacity Correction Factors for Electric and Hot Gas Defrost Units

Saturated Suction Temperature °F +20 -10 -20 -30 -40

Saturated Suction Temperature °C -7 -23 -29 -34 -40

Multiply Capacity By 1.15 1.04 1.00 0.90 0.80

Large Unit Coolers

Physical Specications - Hot Gas Defrost

Hot Gas Defrost

Model Size No. of Fans

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

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

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

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

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

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

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

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

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

BHG 1650 3 1-1/8 OD 2-5/8 OD 1-1/4 FPT 1291

Connections (Inches)

Approx. Net

Weight (Lbs.)Liquid Suction Drain

6 FPI MODELS

BHG 2120 4 1-1/8 OD 2-5/8 OD 1-1/4 FPT 1781

4 FPI MODELS

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

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

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

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

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

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

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

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

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

BHG 1440 3 1-1/8 OD 2-5/8 OD 1-1/4 FPT 1276

BHG 1860 4 1-1/8 OD 2-5/8 OD 1-1/4 FPT 1761

Large Unit Coolers

Dimensions

Figure 1.

26 1/

24 1/

6 7/

4 9/

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

21 5/

29 1/

Refrigerant Piping End

Hot Gas Defrost

Models Dimensions (Inches)

6 FPI 4 FPI Figure A B C F G

BHG 450 BHF 400 1 83-3/32 68-1/8 —- 37-3/16 40-11/32

BHG 550 BHF 480 1 83-3/32 68-1/8 —- 37-3/16 40-11/32

BHG 640 BHF 560 1 105-5/32 90-3/16 45-3/32 37-3/16 40-11/32

BHG 740 BHF 650 1 105-5/32 90-3/16 45-3/32 37-3/16 40-11/32

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

Accepts

/2” Hanger Rod

Electrical End

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

Large Unit Coolers

Dimensions

Figure 2.

A B

35 21/

79/

413/

Refrigerant Piping End

Accepts 5/8” Hanger Rod

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

Hot Gas Defrost Models Dimensions (Inches)

6 FPI 4 FPI Fig. A B C D E F G

BHG 1020 BHF 890 2 135-13/32 120-9/32 40-3/32 80-3/16 — 44-1/2 50-5/16

BHG 1200 BHF 1050 2 135-13/32 120-9/32 40-3/32 80-3/16 — 44-1/2 50-5/16

BHG 1390 BHF 1220 2 135-13/32 120-9/32 40-3/32 80-3/16 — 50-7/32 55-13/16

BHG 1650 BHF 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 50-5/16

BHG 2120 BHF 1860 2 185-1/2 170-3/8 42-19/32 85-3/16 127-25/32 50-7/32 56-1/4

Electrical End

Air Throw

Hot Gas Defrost Models

Air

Standard

Motor

RPM

Standard

HP Each

Air

Throw

with

Collar

450 - 950 400 - 840 850 1/2+ 70 85 1750 2 80 100

1020 - 1390 890 - 1220 850 1 & 1-1/2 100 120 1750 3 115 145

1650 - 2120 1440 - 1860 1140 1-1/2 120 145 1750 3 130 150

+ Three Phase Motors are 1140 RPM Air throw data based on 30 ft. ceiling height with no obstructions where velocity drops to 50 FPM

Optional

High

CFM

Motor

RPM

Optional

HP Each

Air

Throw

Air

Throw

with

Collar6 FPI 4 FPI

Mohave Hot Gas Defrost System • 32°F Room Temperature • R-22

Outdoor Ambient

Condensing

Unit Model

BDV0752M6

BDV0762M6

BDV0802M6

BDV1002M6

BDV1202M6

BDV1502M6

BDV2002M6

BDV2502M6

BDV3002M6

BDV3502M6

BDV4002M6

Evaporator

Qty. Model BTUH TD BTUH TD BTUH TD

1 BHG640 65,900 9.0 63,900 8.7 61,900 8.4

2 BMG310 65,600 9.2 63,600 8.9 61,600 8.7

1 BHF650 66,100 8.9 64,000 8.6 62,000 8.3

2 BMF330 66,200 8.7 64,200 8.5 62,200 8.2

1 BHG740 74,100 8.7 71,700 8.5 69,500 8.2

2 BMG390 74,700 8.4 72,200 8.1 70,000 7.8

1 BHF710 73,700 9.0 71,300 8.8 69,100 8.5

2 BMF370 74,100 8.7 71,700 8.5 69,500 8.2

2 BHF400 74,900 8.2 72,500 7.9 70,200 7.7

1 BHG810 88,500 9.5 86,000 9.3 83,500 9.0

2 BMG430 89,400 9.0 86,800 8.8 84,200 8.5

2 BHG450 90,000 8.7 87,400 8.5 84,800 8.2

1 BHF840 89,100 9.2 86,500 9.0 83,900 8.7

2 BMF440 89,700 8.9 87,100 8.6 84,500 8.4

2 BHF400 88,400 9.6 85,800 9.4 83,300 9.1

1 BHG1020 107,400 9.2 104,300 8.9 101,200 8.7

2 BMG520 107,700 9.0 104,600 8.8 101,500 8.5

2 BHG550 108,500 8.6 105,400 8.4 102,400 8.1

1 BHF1050 107,900 8.9 104,700 8.7 102,300 8.5

2 BMF440 104,900 10.4 101,900 10.1 99,300 9.8

2 BHF560 108,800 8.5 105,700 8.2 103,300 8.0

1 BHG1200 121,400 8.8 117,900 8.6 114,400 8.3

2 BMG520 118,700 9.9 115,300 9.7 111,900 9.4

2 BHG550 119,700 9.5 116,400 9.2 112,900 8.9

1 BHF1050 121,700 8.7 118,200 8.5 114,700 8.2

2 BHF560 120,100 9.3 116,700 9.1 113,200 8.8

1 BHG1390 137,700 8.6 133,700 8.4 129,700 8.1

2 BHG640 135,900 9.3 132,100 9.0 128,100 8.7

1 BHF1220 134,800 9.6 131,000 9.4 127,200 9.1

2 BHF650 136,300 9.1 132,400 8.9 128,400 8.6

1 BHG1390 150,400 9.4 145,700 9.1 141,000 8.8

2 BHG740 151,900 8.9 147,000 8.7 142,300 8.4

1 BHF1440 151,300 9.1 146,500 8.9 141,700 8.6

2 BHF710 150,900 9.3 146,200 9.0 141,400 8.7

1 BHG1650 193,400 10.2 187,000 9.9 181,800 9.6

2 BHG950 197,600 9.0 191,600 8.8 185,600 8.5

1 BHF1860 196,900 9.2 191,100 8.9 185,000 8.7

2 BHF890 195,600 9.6 189,800 9.3 184,000 9.0

1 BHG2120 230,600 9.5 223,900 9.2 217,000 8.9

2 BHG1020 229,300 9.8 222,600 9.5 215,800 9.2

1 BHF1860 225,800 10.6 219,300 10.3 212,600 9.9

2 BHF1220 235,300 8.4 228,500 8.2 221,400 7.9

2 BHG1390 284,900 8.9 276,500 8.7 267,700 8.4

2 BHF1440 286,300 8.7 277,800 8.4 269,100 8.1

2 BHG1650 331,800 8.8 322,300 8.5 312,900 8.3

2 BHF1440 325,500 9.8 316,200 9.6 307,000 9.3

90°F 95°F 100°F

Mohave Hot Gas Defrost System • 32°F Room Temperature • R-404A

Outdoor Ambient

Condensing

Unit Models

BDV0752M6

BDV0762M6

BDV0802M6

BDV1002M6

BDV1202M6

BDV1502M6

BDV2002M6

BDV2502M6

BDV3002M6

BDV3502M6

BDV4002M6

Evaporator

Qty Model BTUH TD BTUH TD BTUH TD

1 BHG640 67,900 9.3 65,200 8.9 62,600 8.5

2 BMG310 67,600 9.5 64,900 9.1 62,400 8.8

1 BHF650 68,100 9.1 65,400 8.8 62,800 8.4

2 BMF330 68,300 9.0 65,500 8.7 62,900 8.3

1 BHG810 78,300 8.4 75,300 8.1 72,100 7.8

2 BMG390 77,900 8.7 74,900 8.4 71,800 8.0

1 BHF710 76,900 9.5 74,000 9.1 70,900 8.7

2 BMF370 77,400 9.1 74,400 8.8 71,300 8.4

1 BHG950 91,900 8.4 88,700 8.1 85,500 7.8

2 BMG430 90,700 9.2 87,500 8.9 84,400 8.6

2 BHG450 91,300 8.8 88,100 8.5 84,900 8.2

1 BHF840 90,300 9.4 87,300 9.0 84,200 8.7

2 BMF440 91,000 9.0 87,800 8.7 84,700 8.4

2 BHF400 89,700 9.8 86,600 9.4 83,600 9.1

1 BHG1020 110,000 9.4 106,200 9.1 102,100 8.7

2 BMG520 110,300 9.2 106,500 8.9 102,400 8.6

2 BHG550 111,200 8.8 107,000 8.5 103,200 8.2

1 BHF1050 110,500 9.2 106,600 8.8 102,500 8.5

2 BMF440 107,600 10.7 103,900 10.3 100,000 9.9

2 BHF480 109,100 9.9 105,200 9.6 101,300 9.2

1 BHG1200 132,200 9.6 127,400 9.3 122,600 8.9

2 BHG640 133,400 9.1 128,500 8.8 123,600 8.4

1 BHF1220 132,506 9.5 127,700 9.1 122,900 8.8

2 BHF650 133,700 8.9 128,800 8.6 123,800 8.3

1 BHG1390 147,500 9.2 142,100 8.9 136,600 8.6

2 BHG740 148,700 8.8 143,200 8.4 137,700 8.1

1 BHF1440 148,200 9.0 142,700 8.6 137,200 8.3

2 BHF710 147,900 9.1 142,400 8.7 137,000 8.4

1 BHG1390 154,300 9.7 147,800 9.3 141,400 8.9

2 BHG740 155,900 9.2 149,200 8.8 142,600 8.4

1 BHF1440 155,200 9.4 148,600 9.0 142,100 8.6

2 BHF710 154,900 9.5 148,300 9.1 141,800 8.7

1 BHG1650 198,900 10.5 191,800 10.1 184,500 9.7

2 BHG950 203,600 9.3 196,200 9.0 188,500 8.7

1 BHF1860 202,900 9.5 195,500 9.2 188,000 8.8

2 BHF890 201,500 9.9 194,100 9.5 186,700 9.1

1 BHG2120 237,200 9.8 228,200 9.4 219,100 9.0

2 BHG1020 235,900 10.1 226,900 9.7 217,900 9.3

1 BHF1860 232,400 10.9 223,600 10.5 215,000 10.1

2 BHF1220 242,000 8.7 232,600 8.3 232,200 8.0

2 BHG1390 299,400 9.4 287,800 9.0 276,100 8.7

2 BHF1440 301,000 9.1 289,000 8.8 277,400 8.4

2 BHG1650 346,800 9.2 334,400 8.8 321,200 8.5

2 BHF1860 352,200 8.3 339,600 7.9 325,900 7.7

90°F 95°F 100°F

Mohave Hot Gas Defrost System • 0°F Room Temperature • R-404A

Outdoor Ambient

Condensing

Unit Model

BDV0602L6

BDV0752L6

BDV0902L6

BDV1002L6

BDV1202L6

BDV1502L6

BDV2202L6

BDV2702L6

BDV3002L6

Evaporator

Qty Model BTUH TD BTUH TD BTUH TD

1 BMG430 44,800 10.0 43,000 9.7 41,200 9.3

1 BHG450 45,100 9.7 43,300 9.4 41,600 9.0

2 BMG260 46,200 8.7 44,500 8.3 42,700 7.9

1 BHF480 45,600 9.3 43,800 8.9 42,100 8.5

1 BMF440 44,900 9.9 43,200 9.5 41,400 9.2

2 BMF250 45,900 9.0 44,100 8.6 42,400 8.2

1 BMG520 52,300 9.7 50,400 9.4 48,300 9.1

1 BHG550 52,800 9.4 50,800 9.0 48,800 8.6

2 BMG260 52,300 9.7 50,400 9.4 48,300 9.1

1 BHF560 52,900 9.2 51,000 8.9 49,000 8.5

2 BMF250 52,000 10.0 50,000 9.7 48,000 9.4

1 BHG640 64,100 9.7 61,700 9.4 59,300 9.0

2 BMG310 63,700 9.9 61,400 9.6 59,000 9.3

1 BHF710 65,200 9.0 62,800 8.6 60,400 8.2

2 BMF330 64,400 9.5 62,000 9.2 59,600 8.8

1 BHG740 71,400 9.4 68,600 9.0 65,900 8.7

2 BMG390 72,000 9.0 69,200 8.6 66,600 8.3

1 BHF710 70,900 9.7 68,100 9.3 65,500 9.0

2 BMF370 71,400 9.4 68,600 9.0 65,900 8.7

2 BHF400 72,300 8.8 69,500 8.4 66,900 8.0

1 BHG740 73,600 9.6 70,500 9.3 67,600 8.9

2 BMG390 74,200 9.3 71,100 8.9 68,200 8.5

1 BHF710 73,100 9.9 70,000 9.6 67,100 9.2

2 BMF370 73,600 9.6 70,500 9.3 67,600 8.9

2 BHF400 74,500 9.1 71,400 8.7 68,500 8.3

1 BHG950 96,900 9.9 93,100 9.5 89,200 9.2

2 BMG520 98,200 9.2 94,400 8.9 90,600 8.5

2 BHG450 96,000 10.3 92,300 9.9 88,500 9.6

1 BHF1050 98,400 9.1 94,500 8.8 90,700 8.4

2 BMF440 95,600 10.5 92,000 10.1 88,200 9.7

2 BHF480 97,100 9.8 93,200 9.4 89,400 9.1

1 BHG1200 117,000 9.5 111,600 9.1 106,400 8.6

2 BMG520 114,300 10.6 109,200 10.1 104,100 9.7

2 BHG550 115,500 10.1 110,200 9.7 105,000 9.3

1 BHF1220 117,300 9.4 111,900 8.9 106,700 8.5

2 BHF560 115,900 10.0 110,500 9.6 105,300 9.2

1 BHG1390 144,200 10.0 137,900 9.6 132,200 9.3

2 BHG740 145,500 9.6 139,300 9.2 133,600 8.8

1 BHF1440 144,900 9.7 138,700 9.4 133,000 9.0

2 BHF710 144,600 9.8 138,400 9.5 132,600 9.1

1 BHG1650 160,000 9.4 153,300 9.1 146,600 8.7

2 BHG810 159,900 9.6 152,800 9.2 146,100 8.8

1 BHF1860 163,200 8.5 156,500 8.1 149,300 7.8

2 BHF840 160,500 9.3 153,800 8.9 147,000 8.5

90°F 95°F 100°F

Mohave Hot Gas Defrost System • -10°F Room Temperature • R-404A

Outdoor Ambient

Condensing

Unit Model

BDV0602L6

BDV0752L6

BDV0902L6

BDV1002L6

BDV1202L6

BDV1502L6

BDV2202L6

BDV2702L6

BDV3002L6

Evaporator

Qty Model BTUH TD BTUH TD BTUH TD

1 BMG390 35,800 9.3 34,400 9.0 32,900 8.5

1 BHG450 36,800 8.2 35,400 7.9 33,700 7.6

1 BMF370 35,500 9.6 34,100 9.2 32,600 8.8

1 BHF400 36,000 9.0 34,600 8.7 33,100 8.3

2 BMF220 36,600 8.4 35,200 8.0 33,600 7.7

1 BMG430 41,300 9.7 39,600 9.3 38,000 9.0

1 BHG450 41,600 9.4 40,000 9.0 38,400 8.6

1 BMF440 41,500 9.5 39,900 9.1 38,300 8.7

1 BHF400 40,700 10.2 39,100 9.8 37,600 9.4

2 BMF220 41,500 9.5 39,900 9.1 38,300 8.7

1 BMG520 50,300 9.7 48,400 9.4 46,500 9.1

1 BHG550 50,900 9.4 49,000 9.0 47,000 8.7

2 BMG260 50,300 9.7 48,400 9.4 46,500 9.1

1 BHF560 51,100 9.1 49,200 8.8 47,200 8.5

2 BMF250 50,000 10.0 48,100 9.7 46,200 9.3

1 BMG520 54,900 10.6 52,800 10.2 50,600 9.8

1 BHG640 57,100 9.1 54,800 8.7 52,600 8.3

2 BMG310 56,800 9.3 54,500 8.9 52,300 8.5

1 BHF650 55,800 10.0 53,600 9.6 51,400 9.2

2 BMF330 57,500 8.7 55,200 8.4 52,900 8.0

1 BMG520 56,200 10.9 53,900 10.4 51,800 10.0

1 BHG640 58,500 9.3 56,100 8.9 53,800 8.5

2 BMG310 58,200 9.5 55,800 9.1 53,500 8.8

1 BHF650 58,800 9.1 56,400 8.7 54,000 8.3

2 BMF330 59,000 8.9 56,500 8.6 54,200 8.2

1 BHG810 77,900 9.7 74,600 9.3 71,500 9.0

2 BMG430 77,400 9.9 74,100 9.6 71,000 9.2

2 BHG450 79,300 8.9 76,100 8.6 73,000 8.1

1 BHF840 78,500 9.4 75,300 9.0 72,000 8.6

2 BMF440 79,200 9.0 75,900 8.7 72,600 8.3

2 BHF400 77,800 9.7 74,600 9.4 71,400 8.9

1 BHG950 92,800 9.8 88,600 9.4 84,500 9.0

2 BMG520 94,300 9.2 90,100 8.8 85,900 8.3

2 BHG450 91,900 10.3 87,800 9.8 83,600 9.4

1 BHF1050 94,600 9.0 90,400 8.6 86,100 8.2

2 BMF440 91,400 10.5 87,500 10.0 83,400 9.5

2 BHF480 93,000 9.7 88,900 9.3 84,800 8.9

1 BHG1200 114,800 9.7 109,900 9.3 105,200 8.9

2 BMG520 115,000 10.8 107,000 10.4 102,500 9.9

2 BHG550 112,900 10.3 108,300 9.9 103,500 9.5

1 BHF1220 115,200 9.5 110,500 9.1 105,800 8.7

2 BHF560 113,300 10.1 108,700 9.7 104,100 9.3

1 BHG1390 127,600 9.3 122,100 8.9 116,700 8.5

2 BHG640 125,700 9.9 120,300 9.5 114,900 9.1

1 BHF1440 128,700 8.9 123,100 8.6 117,500 8.2

2 BHF710 128,400 9.0 122,800 8.7 117,200 8.3

90°F 95°F 100°F

Mohave Hot Gas Defrost System • -20°F Room Temperature • R-404A

Outdoor Ambient

Condensing

Unit Model

BDV0602L6

BDV0752L6

BDV0902L6

BDV1002L6

BDV1202L6

BDV1502L6

BDV2202L6

BDV2702L6

BDV3002L6

Evaporator

Qty Model BTUH TD BTUH TD BTUH TD

1 BMG310 27,100 9.8 25,900 9.4 24,700 9.0

1 BMF330 27,400 9.4 26,200 9.0 25,000 8.5

1 BHF400 28,600 8.0 27,300 7.7 25,900 7.4

1 BMG390 32,100 9.3 30,700 8.9 29,400 8.5

1 BHG450 33,100 8.2 31,700 7.9 30,200 7.6

1 BMF370 31,800 9.6 30,400 9.3 29,000 8.9

1 BHF400 32,300 9.1 30,900 8.7 29,600 8.3

2 BMF220 32,900 8.4 31,600 8.0 30,100 7.7

1 BMG430 38,500 10.0 36,800 9.6 35,200 9.2

1 BHG450 38,800 9.7 37,100 9.3 35,500 8.9

2 BMG260 40,000 8.7 38,300 8.2 36,600 7.9

1 BMF440 38,600 9.8 36,900 9.4 35,300 9.1

1 BHF480 39,300 9.2 37,600 8.8 36,000 8.4

2 BMF220 38,600 9.8 36,900 9.4 35,300 9.1

1 BMG520 43,700 9.5 41,800 9.1 39,900 8.6

1 BHG550 44,200 9.1 42,300 8.7 40,400 8.2

2 BMG260 43,700 9.5 41,800 9.1 39,900 8.6

1 BMF440 42,200 10.8 40,400 10.3 38,500 9.8

1 BHF480 43,000 10.0 41,200 9.6 39,200 9.2

2 BMF220 43,400 9.7 41,500 9.4 39,600 8.9

1 BMG520 44,400 9.6 42,400 9.2 40,300 8.7

1 BHG550 45,000 9.2 42,900 8.8 40,900 8.3

2 BMG260 44,400 9.6 42,400 9.2 40,300 8.7

1 BMF440 42,900 10.9 40,900 10.4 38,900 9.9

1 BHF560 45,100 9.1 43,100 8.7 41,100 8.2

2 BMF250 44,100 9.8 42,000 9.5 40,000 9.0

1 BHG740 61,100 9.4 58,400 9.0 55,800 8.6

2 BMG390 61,800 8.9 59,200 8.5 56,600 8.1

1 BHF710 60,700 9.3 58,000 9.2 55,400 8.8

2 BMF330 61,200 9.3 58,500 8.9 55,900 8.5

2 BHF400 62,100 8.8 59,500 8.3 56,800 7.9

1 BHG810 71,800 9.9 68,200 9.5 64,700 9.0

2 BMG430 72,600 9.5 69,000 9.1 65,600 8.6

2 BHG450 73,200 9.2 69,700 8.7 66,300 8.2

1 BHF840 72,200 9.6 68,700 9.2 65,200 8.8

2 BMF440 72,900 9.3 69,300 8.9 65,900 8.4

2 BHF400 71,600 10.0 68,000 9.6 64,600 9.1

1 BHG1020 88,200 9.7 84,100 9.3 80,100 8.9

2 BMG520 88,500 9.6 84,400 9.2 80,500 8.7

2 BHG550 89,500 9.2 85,500 8.8 81,500 8.3

1 BHF1050 88,700 9.5 84,600 9.1 80,700 8.7

2 BMF440 85,400 10.9 81,500 10.4 77,700 9.9

2 BHF560 89,900 9.1 85,800 8.6 81,900 8.2

1 BHG1200 98,800 9.3 94,000 8.8 89,400 8.4

2 BMG520 96,000 10.3 91,300 9.8 86,600 9.4

2 BHG550 97,100 9.9 92,300 9.4 87,600 9.0

1 BHF1220 99,100 9.2 94,400 8.7 89,700 8.2

2 BHF560 97,400 9.7 92,700 9.3 88,000 8.9

90°F 95°F 100°F

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 o the refrigeration process and maintain an O condition.

At initial power up, the system defaults to the OFF mode for a minimum of two minutes. Following the two-minute hold o period, the control circuit examines the state of the thermostat input. If the thermostat input signal is activated (closed between TStat 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 ow 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 o 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 15ºF, 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 -5ºF, the LLS is activated. If the SST does not fall to -5ºF within 2 minutes, Er12 is activated and the system goes to OFF mode.

If the SST is 15ºF or less, the LLS is activated immediately. When the SST rises to -10ºF for medium temperature applications or -20ºF 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 o 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.

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 eciency while still providing adequate pressure for the thermostatic expansion valve(s) to work properly. The parameters are refrigerant specic. Fans are staged to minimize uctuations 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 modied by turning on the Expert Mode (XPRT) in the Program Menu. See Program Review and Optional Controls for more information.

Evaporator Fan Control: After initial power-up, the evaporator fans will be turned o. When the system initiates the rst 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 rst 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 o 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 o 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 o. While in Service mode, the evaporator fans will turn o. 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.

DEFROST OPERATION

Defrost Timing/Schedule Programming

he 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 o

mode before the defrost process is started.

Defrost Process

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

DEF1:

Pre-defrost, or defrost step 1, always follows activation of O mode. If the system is in Cool mode when the defrost cycle is activated, the control will pump down and go to O 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 rst 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 ow 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 o. 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 rst 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 o 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 3way valve and the pan heater contactor are turned o. 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 o. 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 satised, or deactivated, the system will run a cooling cycle for two minutes and then pump down and shut o.

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 Inactive

Gray = Piping Active

Mohave Hot Gas Defrost Cycle Diagrams

Black = Piping Inactive

Gray = Piping Active

Notes

For more information on Bohn refrigeration products, contact your sales representative or visit us at www.heatcraftrpd.com.

A Brand of Heatcraft Refrigeration Products, LLC 2175 West Park Place Blvd. • Stone Mountain, GA • 30087 (800) 537-7775 www.heatcraftrpd.com

Visit our website at www.heatcraftrpd.com for technical literature online.

Since product improvement is a continuing eort, we reserve the right to make changes in specications without notice.

Bohn BDV-0602L6 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual