KRACK KR Series

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Krack, a Hussmann Corporation brand

1049 Lily Cache Lane, Suite A

Bolingbrook, Illinois 60440

Ph: 630.629.7500

www.krack.com

Main Page

Table of Contents4
Receipt of Equipment6
Inspection6
Loss of Gas Holding Charge6
Location Recommendations6
Unit Mounting7
TABLE 1A. Electric Defrost Unit Dimensions and Connection Sizes7
FIGURE 1 Unit Dimensions7
TABLE 1B. Gas Defrost Unit Dimensions and Connection Sizes8
TABLE 1C. Air Defrost Unit Dimensions and Connection Sizes8
Drain Line9
Refrigeration Piping9
Refrigerant Distributor Nozzles10
FIGURE 2 Multiple Unit Coolers Controlled by a Single Solenoid10
FIGURE 3 Multiple Unit Coolers Controlled by Multiple Solenoids10
TABLE 2A. Air Defrost Models Distributor Nozzle Selections11
TABLE 2B. Electric Defrost Models Distributor Nozzle Selections11
TABLE 2C. Gas Defrost Models Distributor Nozzle Selection12
Expansion Valve13
TABLE 7A. Recommended Expansion Valves for Air Defrost Models13
TABLE 7B. Recommended Expansion Valves for Electric Defrost Models14
TABLE 7C. Recommended Expansion Valves for Gas Defrost Models15
Wiring16
TABLE 8. Motor and Defrost Electrical Information - Electric Defrost16
TABLE 9. Motor and Defrost Electrical Information - Hot Gas Defrost16
Air Defrost Models Wiring Diagrams17
FIGURE 4A Air Defrost Wiring Diagrams for Motor Type B17
FIGURE 4B Air Defrost Wiring Diagram for Motor Type V17
FIGURE 4C Air Defrost Wiring Diagram for Motor Type D17
FIGURE 4D Air Defrost Wiring Diagram with Timer - Motor Type B18
FIGURE 4E Air Defrost Wiring Diagram with Timer - Motor Type V18
FIGURE 4F Air Defrost Wiring Diagram with Timer - Motor Type D18
Electric Defrost Models Wiring Diagrams19
FIGURE 5A Electric Defrost System with Timer Wiring - Motor Type B19
FIGURE 5B Electric Defrost System with Timer Wiring - Motor Type V19
FIGURE 5C Electric Defrost System with Timer Wiring - Motor Type D20
FIGURE 6A Electric Defrost with Timer and Defrost Contactor Wiring - Motor Type B20
FIGURE 6B Electric Defrost with Timer and Defrost Contactor Wiring - Motor Type V21
FIGURE 6C Electric Defrost with Timer and Defrost Contactor Wiring - Motor Type D21
FIGURE 7A Electric Defrost System Wiring Motor Type B - 3 Phase Heaters22
FIGURE 7B Electric Defrost System Wiring Motor Type V - 3 Phase Heaters22
FIGURE 7C Electric Defrost System Wiring Motor Type D Motor - 3 Phase Heaters23
FIGURE 8A Electric Defrost System Wiring Motor Type B - Multiple Evaporator23
FIGURE 8B Electric Defrost System Wiring Motor Type V - Multiple Evaporators24
FIGURE 8C Electric Defrost System Wiring Motor Type D - Multiple Evaporators24
Gas Defrost Models Wiring Diagrams25
FIGURE 9A H - 3 Pipe Hot Gas with Electric Pan Heat and P - 2 Pipe Kool25
Gas with Electric Pan Heat - Motor Type B25
FIGURE 9B H - 3 Pipe Hot Gas with Electric Pan Heat and P - 2 Pipe Kool25
Gas with Electric Pan Heat - Motor Type V25
FIGURE 9C H - 3 Pipe Hot Gas with Electric Pan Heat and P - 2 Pipe Kool26
Gas with Electric Pan Heat - Motor Type D26
FIGURE 10A Model G - 3 Pipe Hot Gas with Gas Pan Heat and K - 2 Pipe Kool26
Gas with Gas Pan Heat - Motor Type B26
FIGURE 10B Models G - 3 Pipe Hot Gas with Gas Pan Heat and K - 2 Pipe Kool26
Gas with Gas Pan Heat - Motor Type V26
Sequence of Operation27
Gas with Gas Pan Heat - Motor Type D27
Models H - 3 Pipe Hot Gas with Electric Pan Heat and P - 2 Pipe Kool Gas with Electric Pan Heat28
Models G - 3 Pipe Hot Gas with Gas Pan Heat and K - 2 Pipe Kool Gas with Gas Pan Heat29
FIGURE 11A Model H (HGE) - 3 Pipe Hot Gas Defrost with Electric Pan Heat29
FIGURE 11B Model G (HGG) - 3 Pipe Hot Gas Defrost with Hot Gas Pan Heat29
FIGURE 12A Model P (KGE) - 2 Pipe Kool Gas Defrost with Electric Pan Heat30
FIGURE 12B Model K (KGG) - 2 Pipe Kool Gas Defrost with Gas Pan Defrost30
Dual Speed Motor Sequence of Operation31
Variable Speed Motor Sequence of Operation31
Variable Speed Motor with System 450 - Sequence of Operation31
Interlocking Single Compressor Unit with Krack Coil32
FIGURE 13 Wiring Drawing of Evaporator with System 450 and Signal Amplifier32
FIGURE 14 Set up in Single Compressor Unit - (Compressor Interlock)33
FIGURE 15 DUAL Speed Motor Evaporator Coils - (Motors with Control Harness)33
FIGURE 16 Variable Speed Motor Evaporator Coils33
Pre-Startup34
FIGURE 17 Defrost Termination Location for Carbon Dioxide (R744)34
Replacement Parts35
FIGURE 18 Replacement Parts35
TABLE 10 Replacement Parts36

KRACK KR Series - Page 39

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