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ICM6502

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Air Handling Controller
The ICM6502 is a package unit heat pump control board designed to provide control of the compressor, reversing valve, auxiliary heat elements, the condenser and evaporator fans. The ICM6502 also accepts inputs from a thermostat, indoor coil temperature, outdoor coil temperature, outdoor ambient temperature, indoor room temperature and a shutdown switch (front desk). The ICM6502 provides compressor protection from short cycling with an anti-short cycle timer and low ambient lockout. A built-in defrost cycle will protect the outdoor coil from freezing up when in heating mode.

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Description

Air Handling Controller
The ICM6502 is a package unit heat pump control board designed to provide control of the compressor, reversing valve, auxiliary heat elements, the condenser and evaporator fans. The ICM6502 also accepts inputs from a thermostat, indoor coil temperature, outdoor coil temperature, outdoor ambient temperature, indoor room temperature and a shutdown switch (front desk). The ICM6502 provides compressor protection from short cycling with an anti-short cycle timer and low ambient lockout. A built-in defrost cycle will protect the outdoor coil from freezing up when in heating mode.

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DETAILS:

The ICM6502 contains all functions to operate a package heat pump. Thermostat and temperature switches are provided, and on-board switching of the compressor, reversing valve, condenser and evaporator fans. The control contains auxiliary heat outputs as well.

  • Power interruption protection for the compressor
  • Random Start delay
  • 6-minute anti-short cycle timer protects compressor from rapid short cycling
  • Two stages of heating (compressor & auxiliary back up heat)
  • Low outdoor ambient compressor lockout (cooling/heating)
  • Steady state cooling
  • Low indoor coil temperature cooling shut down
  • Low outdoor coil defrost lockout (defrost mode)
  • Low indoor room ambient (RS) auxiliary heat mode
  • Front Desk shut down switch input
  • Speed up test mode reduces timing for field testing of the board

WEIGHT/DIMENSIONS:

Width: 7.50″

Height: 5.50″

SPECIFICATIONS:

Input
  • L1 & L2: 240 VAC system power connections
  • Control Voltage: 24VAC
  • G: Fan
  • W1/Y: Heat/Cool – Stage 1
  • W2: Auxiliary Heat – Stage 2
  • O: Reversing Valve
  • FD: Front Desk Switch
  • RS: Indoor Room Sensor
  • Indoor: Indoor Coil Sensor
  • Outdoor: Outdoor Coil Sensor
  • Cooling Lockout: Outdoor Ambient Sensor
Output
  • Compressor, K5, K6: 10 FLA @240 Vac
  • Low Speed Evap. Fan, K9: 2FLA @240 Vac
  • High Speed Evap. Fan, K11: 2FLA @240 Vac
  • Auxiliary Heat Stage 1, K1, K2: 21A Resistive @240 VAC
  • Auxiliary Heat Stage 2, K3, K4: 21A Resistive @240VAC
  • Reversing Valve, K8: 24 Vac 5VA
  • Condenser Fan, K7: 24 Vac 1A Pilot Duty
  • Thermostat Outputs: R (24 Vac) • Com

Replaces:

ClimaTek/First Company: CB1025, CB1026

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