A. Inputs
Power supplies
Line voltage is applied between the “S1” and “N1” quick connect terminals. 24 VAC Class II Transformer secondary voltage supplied to X and C
Limit switch
The 120 VAC optically isolated limit switch input is connected on pin
Thermostat call for heat “W”
24 VAC thermostat input. A call for heat is recognized when the thermostat connects “W” to “R”. This input has an indicator LED that will light when the control receives a call for heat. Refer to the Heat Mode section for the control operation.
Thermostat call for cool, “Y”
24 VAC thermostat input. A call for cooling is recognized when the thermostat connects “Y” to “R”. This input has an indicator LED that will light when the control receives a call for cooling. Refer to the Cool Mode section for the control operation.
Thermostat call for dehumidification “DEHUM”
24 VAC thermostat input. A call for dehumidification is recognized when the humidistat connects “DEHUM” to “R”. This input has an indicator that will light when the control receives a call for dehumidification. Refer to the Cool Mode section for the control operation.
Thermostat call for fan “G”
24 VAC thermostat input. A call for fan is recognized when the thermostat connects “G” to “R”. This input has an indicator LED in that will light when the control receives a call for fan. Refer to the Fan Mode section for the control operation.
B. Outputs
PSC Control
The control shall control a
Oil Burner
Control
The control provides dedicated contacts to operate the
Power
The switched 120 VAC power from the LIMIT switch passes through the board between Pins 1 & 2 of connector P1.
Compressor contactor
The control provides switched 24VAC to operate a compressor contactor. Rating shall be class 2 – 24 VAC pilot duty @ 24 VAC (<200mA).
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