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Table of Contents
Related Manuals for Sub-Zero CRC-2052
Summary of Contents for Sub-Zero CRC-2052
- Page 1 COLD ROOM CONTROLLER USER MANUAL CRC-2052 INDIA www.subzero.co...
- Page 2 C-UL Under load limit for compressor current. To set type of computation for defrost 14-15 time. C-OL Over load limit for compressor current. To set defrost stop temperature. D-UL Under load limit for Heater / Solenoid. 23-24 CRC-2052 CRC-2052...
- Page 3 Index Index Introduction The CRC-2052 is single set point cold room controller. The Sub-Zero CRC-2052 is aesthetically superior versions of PARAMETER DESCRIPTION their predecessors. D-OL Over load limit for Heater/Solenoid. Current sensing delay. Features: To enable or Disable HP sensing.
- Page 4 Set mode/program mode. Used to enter in display Amp. mode where compressor and defrost current can be viewed. Used to switch OFF/ON the light. Items included ITEMS CONTROLLER NTC SENSOR 5 METER CATALOGUE 8 X 38 SCREW WITH RAWL PLUG CRC-2052 CRC-2052...
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Page 5: Fault Messages
Light Relay On. HP fault. Light Relay Off. R-phase present. LP fault. R-phase absent. Y-phase present. Auxiliary fault. Y-phase absent. B-phase present. B-phase absent. Controller is in emergency stop mode. Emergency Controller is not in emergency stop Stop mode. CRC-2052 CRC-2052... - Page 6 ON. But at power on till the AL delay is If condenser logic is set to SP then over controller will not generate HT Alarm. condenser will switch off at this set point. Range Fact. Set (Message on Display) 0.0ºC 99.9ºC 20.0ºC CRC-2052 CRC-2052...
- Page 7 Description of parameters and functions. Description of parameters and functions. Parameter Parameter setting method Parameter Parameter setting method Function : To set allowable low Function : To set probe calibration. Parameter temperature limit. Parameter Use UP/DOWN keys to set desired To change P5 parameter, To change...
- Page 8 Example : If P9 parameter is 30 mins an ON mode. 0 Min 99 Min 30 Min then at power after 30 mins defrosting It keeps a record of the hours worked will take place once. +/-½ Hour incase of a power failure. CRC-2052 CRC-2052...
- Page 9 Example : If the set point is set at 60% Range and differential is set at 3, then when the system reaches 60%, the Relay will cut Fact. Set out. Since the differential is 3, the relay will cut in (restart) at 63% (60% -3%). CRC-2052 CRC-2052...
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Page 10: To Set Condenser Logic
CSET (Condenser set point ) is 20.0 in humidity like above a cold room door. deg & CND4 to 2.0 deg then at 20.0 Fact. Set degree condenser relay will be off and 0.5ºC 20.0ºC 2.0ºC restart at (20.0 +2.0) 22.0 deg CRC-2052 CRC-2052... - Page 11 This function is used to decide the Range condenser status when hot gas defrost is on. This parameter is not applicable for Fact. Set Heater defrost. At hot gas defrost, OFF : Condenser will be OFF ON : Condenser will be ON CRC-2052 CRC-2052...
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Page 12: To Enable / Disable Buzzer
: Evaporator Fan Off. Fact. Set alarms when the ambients are high COMP : Compressor Off. when the machine is switched on after NORM NORM : Compressor and Evaporator Fan a long time. Off. CRC-2052 CRC-2052... -
Page 13: C2 Current Sensing Delay
Solenoid will get OFF on this fault. If ignore HP fault for compressor. If this after 3 retries within 1 Hour current parameter is set to Enable then controller drawn is still less than 1.0Amp the will detect HP trip. CRC-2052 CRC-2052... - Page 14 'CYC' then the Fact. Set when it present continuously for 5 Secs. Fact. Set Fact. Set Fact. Set on cycle is specified by Ton parameter. 0 Sec 180 Sec 30 Sec 1 Min 30 Min 10 Min CRC-2052 CRC-2052...
- Page 15 Use UP/DOWN key to change the press the set key. password. User can enter into program mode Range Range only if correct password is entered. If the Fact. Set Fact. Set password is wrong it will show ‘INVALID PASSWORD’. 9999 CRC-2052 CRC-2052...
- Page 16 Range Range NO : deactivates keypad lock. Fact. Set Fact. Set YES : activates keypad lock. On activation, all the parameters can only be viewed, but not modified. If the keypad is locked “LOCK” message will be displayed.. CRC-2052 CRC-2052...
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Page 17: Technical Data
Condenser Temperature : Range : 0.0 C to 99.9 C 2) Humidity sensor Sensor Type 4-20mA out. Range : 0 to 100% Resolution : 1%. Analog I/p: Compressor current (R,Y,B) Defrost current(R,Y,B) Resolution : 0.1Amp. Accuracy : +/-1 Amp. CRC-2052 CRC-2052... -
Page 18: Technical Data
WARNING : Improper wiring may cause irreparable damage and personal injury. Kindly ensure that wiring is done by qualified personnel only. Maintenance : Cleaning : Clean the surface of the controller with a soft moist cloth. Do not use abrasive detergents, petrol, alcohol or solvents. CRC-2052 CRC-2052... -
Page 19: Crc-2052
In no event shall the company be held liable for Hand Valves incidental or consequential damages, such as lost revenue or lost business opportunity arising from the purchase of this product. Flow Switches Solenoid Valves CRC-2052 00 / 13.03.12... - Page 20 SUGGESTED CONNECTION DIAGRAM OUTPUTS OUTPUTS CT INPUT SENSOR FAULT SIGNALS INPUT SUPPLY RS485...
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Questions and answers
I have a Sub Zero panel, model CRC 2052, and a Danfoss KP17WB dual pressure switch. The pressure switch has terminals marked C, B, A, and D. On the Sub Zero panel, terminal 36 is for HP/LP OUT, terminal 37 is for HP IN, and terminal 38 is for LP IN. Please explain how to connect this properly. The compressor is a Bock model and includes an INT69 motor protection relay as well. Kindly explain with an example.
To connect a Danfoss KP17WB dual pressure switch to a Sub-Zero CRC-2052 panel:
1. Identify KP17WB Outputs:
- It has two SPDT switches: one for high pressure (HP) and one for low pressure (LP).
- Each switch has common (C), normally open (NO), and normally closed (NC) terminals.
2. Connect to CRC-2052 Terminals:
- HP IN: Connect the common terminal (C) of the HP switch on KP17WB.
- LP IN: Connect the common terminal (C) of the LP switch on KP17WB.
- HP/LP OUT: Connect the normally closed (NC) terminals of both HP and LP switches in series, then wire the output to HP/LP OUT on the CRC-2052 panel.
3. Operation:
- Under normal conditions, both HP and LP switches remain closed (NC path), allowing signal flow to HP/LP OUT.
- On a fault (high or low pressure), the respective switch opens, interrupting the signal and triggering a fault in the CRC-2052 controller.
Ensure wiring follows electrical safety standards and matches the voltage levels used by the controller.
This answer is automatically generated