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All installations and services must be performed by qualified service personnel.
3
C. 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 120VAC limit switch is connected to pins P2-1 & 9. Refer to the Heat Mode section for the control
operation.
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 Led 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.
D. Outputs
ECM Control
The control controls a multiple speed ECM motor through the 6-pin P3 connector. This connector
provides connection for ECM Speed common (Pin 1), Speed output (Pin 2), Blower Enable (Pin 4), Cool
Enable (Pin 5) and “R” output (Pin 6).
Oil Burner
Control
The control provides dedicated contacts to operate the T-T input of an oil primary control. Rating
shall be class 2 - 24 VAC pilot duty @ 24 VAC (< 200mA).
Power
The switched 120VAC power from the LIMIT switch passes through the board between Pins 1&2
of connector P2.
Compressor contactor
The control provides switched 24VAC to operate a compressor contactor. Rating shall be class 2 - 24
VAC pilot duty @ 24 VAC (< 200mA).