3KR Electrical Defrost Unit Coolers (PN E108318_S)
TABLE OF CONTENTS
1 RECEIPT OF EQUIPMENT ................................................................................................................................................ 5
1.1 INSPECTION ............................................................................................................................................................... 5
1.2 LOSS OF GAS HOLDING CHARGE ........................................................................................................................... 5
2 LOCATION RECOMMENDATIONS ................................................................................................................................... 5
3 UNIT MOUNTING ............................................................................................................................................................... 6
4 DRAIN LINE ....................................................................................................................................................................... 8
5 REFRIGERATION PIPING ................................................................................................................................................. 8
6 REFRIGERANT DISTRIBUTOR NOZZLES ...................................................................................................................... 9
7 EXPANSION VALVE ........................................................................................................................................................ 12
8 WIRING ............................................................................................................................................................................ 15
8.1 AIR DEFROST MODELS WIRING DIAGRAMS ........................................................................................................ 16
8.2 ELECTRIC DEFROST MODELS WIRING DIAGRAMS ............................................................................................ 18
8.3 GAS DEFROST MODELS WIRING DIAGRAMS ...................................................................................................... 24
9 SEQUENCE OF OPERATION ......................................................................................................................................... 26
9.1 MODELS H - 3 PIPE HOT GAS WITH ELECTRIC PAN HEAT AND P - 2 PIPE KOOL GAS WITH
ELECTRIC PAN HEAT .............................................................................................................................................. 27
9.2 MODELS G - 3 PIPE HOT GAS WITH GAS PAN HEAT AND K - 2 PIPE KOOL GAS WITH GAS PAN HEAT ....... 28
9.3 DUAL SPEED MOTOR SEQUENCE OF OPERATION ............................................................................................ 30
9.4 VARIABLE SPEED MOTOR SEQUENCE OF OPERATION ..................................................................................... 30
9.5 VARIABLE SPEED MOTOR WITH SYSTEM 450 - SEQUENCE OF OPERATION ................................................. 30
9.6 INTERLOCKING SINGLE COMPRESSOR UNIT WITH KRACK COIL .................................................................... 31
10 PRE-STARTUP ................................................................................................................................................................ 33
11 REPLACEMENT PARTS ................................................................................................................................................. 34
TABLES
TABLE 1A. Electric Defrost Unit Dimensions and Connection Sizes ..................................................................................6
TABLE 1B. Gas Defrost Unit Dimensions and Connection Sizes ........................................................................................7
TABLE 1C. Air Defrost Unit Dimensions and Connection Sizes .......................................................................................... 7
TABLE 2A. Air Defrost Models Distributor Nozzle Selections ............................................................................................10
TABLE 2B. Electric Defrost Models Distributor Nozzle Selections ....................................................................................10
TABLE 2C. Gas Defrost Models Distributor Nozzle Selection ........................................................................................... 11
TABLE 7A. Recommended Expansion Valves for Air Defrost Models ...............................................................................12
TABLE 7B. Recommended Expansion Valves for Electric Defrost Models .......................................................................13
TABLE 7C. Recommended Expansion Valves for Gas Defrost Models ............................................................................14
TABLE 8. Motor and Defrost Electrical Information – Electric Defrost ...............................................................................15
TABLE 9. Motor and Defrost Electrical Information – Hot Gas Defrost .............................................................................15
TABLE 10 Replacement Parts ...........................................................................................................................................35
FIGURES
FIGURE 1 Unit Dimensions ................................................................................................................................................ 6
FIGURE 2 Multiple Unit Coolers Controlled By a Single Solenoid ......................................................................................9
FIGURE 3 Multiple Unit Coolers Controlled By Multiple Solenoids ..................................................................................... 9
FIGURE 4A Air Defrost Wiring Diagrams for Motor Type B ............................................................................................... 16
FIGURE 4B Air Defrost Wiring Diagram for Motor Type V ................................................................................................16
FIGURE 4C Air Defrost Wiring Diagram for Motor Type D ................................................................................................16
FIGURE 4D Air Defrost Wiring Diagram with Timer - Motor Type B .................................................................................. 17
FIGURE 4E Air Defrost Wiring Diagram with Timer - Motor Type V……………………. ....................................................17
FIGURE 4F Air Defrost Wiring Diagram with Timer - Motor Type D ..................................................................................17
FIGURE 5A Electric Defrost System with Timer Wiring - Motor Type B ............................................................................18
FIGURE 5B Electric Defrost System with Timer Wiring - Motor Type V ............................................................................18
FIGURE 5C Electric Defrost System with Timer Wiring - Motor Type D ............................................................................19
FIGURE 6A Electric Defrost with Timer and Defrost Contactor Wiring - Motor Type B ....................................................19
FIGURE 6B Electric Defrost with Timer and Defrost Contactor Wiring - Motor Type V .................................................... 20
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