Related Manuals for KRACK KR Series
Summary of Contents for KRACK KR Series
- Page 1 KR Series UNIT COOLERS Installation and Operation Manual Part Number: E108318_S Products that provide lasting solutions.
- Page 2 RTISSEMENT AVERTISSEMENT BEFORE YOU BEGIN Read the safety information completely and carefully. CAUTION The precautions and use of the procedures described WARNING herein are intended to use the product correctly and safely. Comply with the precautions described below to protect you and others from possible injuries. Relative to their potential danger, the relevant matters are divided PERSONAL PROTECTION EQUIPMENT (PPE) into four parts as defined by ANSIZ535.5...
- Page 3 CAUTION CAUTION WARNING WARNING — LOCK OUT/TAG OUT — Proper Field Wiring and Grounding Required! To avoid serious injury or death from electrical Failure to follow code could result in death or shock, always disconnect the electrical power at serious injury. All field wiring MUST be performed the main disconnect when servicing or replacing by qualified personnel.
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Page 4: Table Of Contents
DUAL SPEED MOTOR SEQUENCE OF OPERATION .................... 30 VARIABLE SPEED MOTOR SEQUENCE OF OPERATION ..................30 VARIABLE SPEED MOTOR WITH SYSTEM 450 - SEQUENCE OF OPERATION ..........30 INTERLOCKING SINGLE COMPRESSOR UNIT WITH KRACK COIL ..............31 PRE-STARTUP ................................33 REPLACEMENT PARTS ..............................34 TABLES TABLE 1A. - Page 5 FIGURE 6C Electric Defrost with Timer and Defrost Contactor Wiring - Motor Type D ............20 FIGURE 7A Electric Defrost System Wiring Motor Type B - 3 Phase Heaters ..............21 FIGURE 7B Electric Defrost System Wiring Motor Type V - 3 Phase Heaters ..............21 FIGURE 7C Electric Defrost System Wiring Motor Type D Motor - 3 Phase Heaters ............22 FIGURE 8A Electric Defrost System Wiring Motor Type B –...
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Page 6: Receipt Of Equipment
Unit Type Heater Voltage KR - Compact Series A - 208-230/1/60 B - 115/1/60* DOE Application K - 208-230/3/60 D - DOE and NR Can A - Non-Regulated Motor Voltage Number of Fans A - 208-230/1/60 B - 115/1/60* Fin Spacing Motor Type 4, 6 FPI D - Dual Speed EC... -
Page 7: Unit Mounting
UNIT MOUNTING The unit cooler may be suspended with 3/8” diameter hanger rods or flush mounted to the ceiling using 5/16” minimum lag screws with flat washers. Rods should be double nutted top and bottom. The unit must be level in all directions to insure proper drainage of condensate. Suspended units must have enough clearance above for cleaning the top. -
Page 8: Table 1B. Gas Defrost Unit Dimensions And Connection Sizes
TABLE 1B: GAS DEFROST UNIT DIMENSIONS AND CONNECTION SIZES Refrigeration Connections DIMENSIONS (IN) MODEL NUMBERS SUCT HOT GAS KR*14( )-037[ ]{ } 1/2” 5/8” 1/2” 29.13 15.32 15.9 KR*24( )-074[ ]{ } 1/2” 7/8” 1/2” 47.13 15.32 15.9 KR*34( )-111[ ]{ } 1/2”... -
Page 9: Drain Line
4 DRAIN LINE The drain line should be as short and as steeply pitched as possible with a minimum of ¼” drop per running foot. Any traps in the drain line must be in an ambient above freezing location. If the temperature sur- rounding the trap or drain line is below freezing (32°F) it must be wrapped with a drain line heater. -
Page 10: Refrigerant Distributor Nozzles
FIGURE 2: MULTIPLE UNIT COOLERS CONTROLLED BY A SINGLE SOLENOID FIGURE 3: MULTIPLE UNIT COOLERS CONTROLLED BY MULTIPLE SOLENOIDS 6 REFRIGERANT DISTRIBUTOR NOZZLES Distributor nozzles are included using a refrigerant distributor with a changeable nozzle design. The nozzle(s) are packed in individual plastic envelopes along with a retainer ring and instruction card. The instruction card provides information on nozzle used based on refrigerant. -
Page 11: Table 2A. Air Defrost Models Distributor Nozzle Selections
TABLE 2A: AIR DEFROST MODELS DISTRIBUTOR NOZZLE SELECTIONS DISTRIBUTOR NOZZLES MODELS R-404A R-407A R-448A KRD16A-060[ ]{ } L - 3/4 L - 1/2 L - 1/2 KRD26A-125[ ]{ } L - 1-1/2 L - 1 L - 1 KRD36A-170[ ]{ } L - 2 L - 1-1/2 L - 1-1/2... -
Page 12: Table 2C. Gas Defrost Models Distributor Nozzle Selection
TABLE 2C GAS DEFROST MODELS DISTRIBUTOR NOZZLE SELECTION DISTRIBUTOR NOZZLES MODELS R-404A R-407A R-448A L - 3/4 L - 1/2 L - 1/2 KR*14( )-037[ ]{ } KR*24( )-074[ ]{ } L - 1-1/2 L - 1 L - 1 L - 2 L - 1-1/2 L - 1-1/2... -
Page 13: Expansion Valve
7 EXPANSION VALVE TABLE 7A: RECOMMENDED EXPANSION VALVES FOR AIR DEFROST MODELS MODELS R-404A R-407A R-448A SBFSE-AA-C SBFNE-AA-C SBFDE-AA-C KRD16A-060[ ]{ } EGSE-1/2-C EGNE-1/2-C EGDE-1/3-C SBFSE-A-C SBFNE-A-C SBFDE-A-C KRD26A-125[ ]{ } EGSE-1-C EGNE-1-C EGDE-1-C SBFSE-B-C SBFNE-A-C SBFDE-A-C KRD36A-170[ ]{ } EGSE-1-1/2-C EGNE-1-1/2-C EGDE-1-C... -
Page 14: Table 7B. Recommended Expansion Valves For Electric Defrost Models
TABLE 7B: RECOMMENDED EXPANSION VALVES FOR ELECTRIC DEFROST MODELS MODELS R404A R407A R448A SBFSE-AA-Z SBFNE-AA-Z SBFDE-AAA-Z KR*14E-037[ ]{ } EGSE-1/4-Z EGNE-1/2-Z EGDE-1/4-Z SBFSE-A-Z SBFNE-A-Z SBFDE-AA-Z KR*24E-074[ ]{ } EGSE-1-Z EGNE-1-Z EGDE-1/2-Z SBFSE-A-Z SBFNE-A-Z SBFDE-A-Z KR*34E-111[ ]{ } EGSE-1-Z EGNE-1-1/2-Z EGDE-1-Z SBFSE-B-Z SBFNE-B-Z SBFDE-A-Z... -
Page 15: Table 7C. Recommended Expansion Valves For Gas Defrost Models
TABLE 7C: RECOMMENDED EXPANSION VALVES FOR GAS DEFROST MODELS MODELS R404A R407A R448A SBFSE-AA-Z SBFNE-AA-Z SBFDE-AAA-Z KR*14( )-037[ ]{ } EGSE-1/4-Z EGNE-1/2-Z EGDE-1/4-Z SBFSE-A-Z SBFNE-A-Z SBFDE-AA-Z KR*24( )-074[ ]{ } EGSE-1-Z EGNE-1-Z EGDE-1/2-Z SBFNE-A-Z SBFDE-A-Z SBFSE-A-Z KR*34( )-111[ ]{ } EGSE-1-Z EGDE-1-Z EGNE-1-1/2-Z... -
Page 16: Wiring
To prevent overshooting the desired setting, only one turn of the stem should be made at a time. As much as 30 minutes may be required for the new balance to take place after an adjustment is made. Always tighten the adjusting stem packing nut and replace the seal cap tightly after the adjustment is complete. -
Page 17: Air Defrost Models Wiring Diagrams
8.1 AIR DEFROST MODELS WIRING DIAGRAMS FIGURE 4A: AIR DEFROST WIRING DIAGRAM FOR MOTOR TYPE B FIGURE 4B: AIR DEFROST WIRING DIAGRAM FOR MOTOR TYPE V FIGURE 4C: AIR DEFROST WIRING DIAGRAM FOR MOTOR TYPE D KR Electrical Defrost Unit Coolers (PN E108318_S) -
Page 18: Figure 4D Air Defrost Wiring Diagram With Timer - Motor Type B
FIGURE 4D: AIR DEFROST WIRING DIAGRAM WITH TIMER - MOTOR TYPE B FIGURE 4E: AIR DEFROST WIRING DIAGRAM WITH TIMER - MOTOR TYPE V FIGURE 4F: AIR DEFROST WIRING DIAGRAM WITH TIMER - MOTOR TYPE D KR Electrical Defrost Unit Coolers (PN E108318_S) -
Page 19: Electric Defrost Models Wiring Diagrams
8.2 ELECTRIC DEFROST MODELS WIRING DIAGRAMS FIGURE 5A: ELECTRIC DEFROST SYSTEM WITH TIMER WIRING - MOTOR TYPE B FIGURE 5B: ELECTRIC DEFROST SYSTEM WITH TIMER WIRING - MOTOR TYPE V KR Electrical Defrost Unit Coolers (PN E108318_S) -
Page 20: Figure 5C Electric Defrost System With Timer Wiring - Motor Type D
FIGURE 5C: ELECTRIC DEFROST SYSTEM WITH TIMER WIRING - MOTOR TYPE D FIGURE 6A: ELECTRIC DEFROST WITH TIMER AND DEFROST CONTACTOR WIRING - MOTOR TYPE B KR Electrical Defrost Unit Coolers (PN E108318_S) -
Page 21: Figure 6B Electric Defrost With Timer And Defrost Contactor Wiring - Motor Type V
FIGURE 6B: ELECTRIC DEFROST WITH TIMER AND DEFROST CONTACTOR WIRING - MOTOR TYPE V FIGURE 6C: ELECTRIC DEFROST WITH TIMER AND DEFROST CONTACTOR WIRING - MOTOR TYPE D KR Electrical Defrost Unit Coolers (PN E108318_S) -
Page 22: Figure 7A Electric Defrost System Wiring Motor Type B - 3 Phase Heaters
FIGURE 7A: ELECTRIC DEFROST SYSTEM WIRING MOTOR TYPE B - 3 PHASE HEATERS FIGURE 7B: ELECTRIC DEFROST SYSTEM WIRING MOTOR TYPE V - 3 PHASE HEATERS KR Electrical Defrost Unit Coolers (PN E108318_S) -
Page 23: Figure 7C Electric Defrost System Wiring Motor Type D Motor - 3 Phase Heaters
FIGURE 7C: ELECTRIC DEFROST SYSTEM WIRING MOTOR TYPE D MOTOR - 3 PHASE HEATERS FIGURE 8A: ELECTRIC DEFROST SYSTEM WIRING MOTOR TYPE B – MULTIPLE EVAPORATORS When defrosting two or more units at one time with a single time clock, the defrost termination thermostats must be wired in series as shown in FIGURE 8 below. -
Page 24: Figure 8B Electric Defrost System Wiring Motor Type V - Multiple Evaporators
FIGURE 8B: ELECTRIC DEFROST SYSTEM WIRING MOTOR TYPE V – MULTIPLE EVAPORATORS FIGURE 8C: ELECTRIC DEFROST SYSTEM WIRING MOTOR TYPE D – MULTIPLE EVAPORATORS KR Electrical Defrost Unit Coolers (PN E108318_S) -
Page 25: Gas Defrost Models Wiring Diagrams
8.3 GAS DEFROST MODELS WIRING DIAGRAMS FIGURE 9A: H - 3 PIPE HOT GAS WITH ELECTRIC PAN HEAT AND P - 2 PIPE KOOL GAS WITH ELECTRIC PAN HEAT – MOTOR TYPE B FIGURE 9B: H - 3 PIPE HOT GAS WITH ELECTRIC PAN HEAT AND P - 2 PIPE KOOL GAS WITH ELECTRIC PAN HEAT –... -
Page 26: Figure 9C H - 3 Pipe Hot Gas With Electric Pan Heat And P - 2 Pipe Kool
FIGURE 9C: H - 3 PIPE HOT GAS WITH ELECTRIC PAN HEAT AND P - 2 PIPE KOOL GAS WITH ELECTRIC PAN HEAT – MOTOR TYPE D FIGURE 10A: MODEL G - 3 PIPE HOT GAS WITH GAS PAN HEAT AND K - 2 PIPE KOOL GAS WITH GAS PAN HEAT –... -
Page 27: Sequence Of Operation
FIGURE 10C: MODEL G - 3 PIPE HOT GAS WITH GAS PAN HEAT AND K - 2 PIPE KOOL GAS WITH GAS PAN HEAT – MOTOR TYPE D 9 SEQUENCE OF OPERATION Step A – Normal Refrigeration Cycle 1. Power is supplied to terminals “N” and “4” on the defrost timer. 2. -
Page 28: Models H - 3 Pipe Hot Gas With Electric Pan Heat And P - 2 Pipe Kool Gas With Electric Pan Heat
3. The evaporator coil cools down approaching operating temperature. 4. When the coil temperature reaches 25°F (approximately two to three minutes after defrost termination), the fan delay thermostat closes thus allowing the fan motors to restart. The unit is now back in operation. NOTE: On systems where the room temperature is above +25°F, the fan delay thermostat may not close for an extended period. -
Page 29: Models G - 3 Pipe Hot Gas With Gas Pan Heat And K - 2 Pipe Kool Gas With Gas Pan Heat
FIGURE 11A: MODEL H (HGE) – 3 PIPE HOT GAS DEFROST WITH ELECTRIC PAN HEAT FIGURE 11B: MODEL G (HGG) – 3 PIPE HOT GAS DEFROST WITH HOT GAS PAN HEAT 9.2 MODELS G – 3 PIPE HOT GAS WITH GAS PAN HEAT AND K - 2 PIPE KOOL GAS WITH GAS PAN HEAT Three pipe hot gas defrost system - Distribute compressor discharge gas through a separate hot gas line, controlled by a solenoid valve, through a check valve to the refrigerant distributor auxiliary... -
Page 30: Figure 12A Model P (Kge) - 2 Pipe Kool Gas Defrost With Electric Pan Heat
The defrost cycle is field controller initiated and terminated. Step A Power is supplied to the unit cooler continuously. Step B In Case of H, defrost hot gas is supplied to the unit via liquid line and in Case of P, defrost Kool Gas is supplied to the suction line. -
Page 31: Dual Speed Motor Sequence Of Operation
9.3 DUAL SPEED MOTOR SEQUENCE OF OPERATION – KR coils uses Dual Speed EC motors for fans used in DOE applications with the default being the high speed and the second speed set as the minimum speed. Fans will be in Min speed/Full speed or Off in scenarios below: Minimum speed When the room temperature or the refrigeration setpoint is met, the fan will operate at half... -
Page 32: Interlocking Single Compressor Unit With Krack Coil
9.6 INTERLOCKING SINGLE COMPRESSOR UNIT WITH KRACK COIL When a single compressor unit is utilized with a Krack evaporator, the evaporator fan should run at full speed whenever the compressor is running (i.e., when using evaporator with dual speed motor fans), and variable speed motor fans the fan speed should not modulate when the compressor is running. -
Page 33: Figure 14 Set Up In Single Compressor Unit - (Compressor Interlock)
Single compressor units use a contactor for compressor operation, a NC Aux contact attached to the main contactor and will be used to interlock. FIGURE 14 – SETUP IN SINGLE COMPRESSOR UNIT - (COMPRESSOR INTERLOCK) Aux contact in Single compressor unit wired to terminal pins. FIGURE 15: DUAL SPEED MOTOR EVAPORATER COILS –... -
Page 34: Pre-Startup
In the case of variable speed motor coils, the jumper between the terminal A0+ and A should be removed and then the aux contact from the single compressor unit be wired in series. Whenever the compressor contactor is energized, the aux contact energizes, and NC contacts changes state to NO, there by opening the analog 10V signal circuit. -
Page 35: Replacement Parts
11 REPLACEMENT PARTS Listed below are the major replacement parts. When ordering parts, it is imperative that you obtain the complete model and serial number of the unit. FIGURE 18: REPLACEMENT PARTS KR Electrical Defrost Unit Coolers (PN E108318_S) -
Page 36: Table 10 Replacement Parts
TABLE 10 REPLACEMENT PARTS Krack Aftermarket Item General Description Options Description Part Number MOTOR SP 460V E206446 PSC 115V E206447 PSC 230V E206448 EC 115V E410410001 EC 208/230V E410410001 EC 115/230V DUAL Speed 3047945 EC 115/230V VAR SPEED 3047948 MOTOR MOUNT... - Page 37 HARNESS-VS 2 FAN 3086203 HARNESS-VS 3 FAN 3086204 HARNESS-VS 4 FAN 3086205 HARNESS-VS 5 FAN 3086206 HARNESS-VS 6 FAN 3086207 ALUMINUM DRAIN FITTING E206462 ALUMINUM CONDUIT COUPLING E206463 DRAIN FITTING GASKET E206464 THERMOSTATS AND FAN SPEED CONTROLS DEFROST TERM (14T32) E206100 HEATER SAFETY (14T21) 109560...
- Page 38 EGSE-1/4-ZP E206235 EGSE-1½-ZP E206317 SBFVE-C-ZP40 E206600 SBFSE-C-ZP E311124 LONG THROW ADAPTERS GALVANIZED E202347 AUX CONTACT FOR SINGLE COMP C320KG2 AUX CONT 1 NC 25-75A E209975002 INTERLOCK C320DPG01 AUX CONT 1 NC 90A E209976002 NOTES: KR Electrical Defrost Unit Coolers (PN E108318_S)
- Page 39 Use your QR reader to reference current document version on www.krack.com. Krack, a Hussmann Corporation brand 1049 Lily Cache Lane, Suite A Bolingbrook, Illinois 60440 Ph: 630.629.7500 www.krack.com Printed in U.S.A. ©2020 Krack, a Hussmann Corporation brand KR-Series 05/05/2020...
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