C. Inputs ; D. Outputs ; All installations and services must be performed by qualified service personnel.- Page 5

All installations and services must be performed by qualified service personnel.

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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).