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C --
A --
G --
RC --
Y --
W --
RH --
W2 --
C --
G --
O --
B --
W2 --
Y --
RH --
Step 4: Wiring Information (continued)
Installation
C
B
O
A
G
RC
Y
RH
W2
W
Terminal Designation Reference Guide
Conventional Gas/Oil/Electric Heating and Cooling Systems (No Heat Pump):
Common (power or hot) wire from secondary side of heating system transformer. (Note: This wire
is required for thermostat operation. If you do not have a “C” wire, please call customer
support at 1-866-545-5765, e-mail at homesettings@wayne-dalton.com, or contact your
HVAC professional to review possible solutions.)
Heat return or 1st stage relay (controls heating system)
2nd Stage heat relay
1st stage compressor contactor (controls air conditioning system)
Power for Heating system (Notes: 1. If there is just one power wire (R or RH) connect it to RH
with jumper 3 ON (most systems are like this.) 2. Never short RH terminal to C terminal as
severe damage to your HVAC system will occur.)
Power for Cooling system.
Fan control relay
3rd wire for 3-wire zoned hot water heating systems
Heat Pump Systems:
Common (power or hot) wire from secondary side of heating system transformer. (Note: This wire
is required for thermostat operation. If you do not have a “C” wire, please call customer
support at 1-866-545-5765, e-mail at homesettings@wayne-dalton.com, or contact your
HVAC professional to review possible solutions.)
Changeover valve control (Powered in HEAT) (Note: Never connect B and O terminals together as
severe damage to your HVAC system will occur.)
Changeover valve control (Powered in COOL) (Note: Never connect B and O terminals together as
severe damage to your HVAC system will occur.)
Auxiliary heat/2nd Stage heat relay
1st stage compressor contactor (controls air conditioning system and 1st stage of heat pump)
Power for heat pump. (Notes: 1. If there is just one power wire (R or RH) connect it to RH
with jumper 3 ON (most systems are like this.) 2. Never short RH terminal to C terminal as
severe damage to your HVAC system will occur.)
Fan control relay
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