Step 4: Wiring Information (continued)
C B OW2 W Y RH RC G A
Terminal Designation Reference Guide
Conventional Gas/Oil/Electric Heating and Cooling Systems (No Heat Pump):
C--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.)
W--Heat return or 1st stage relay (controls heating system) W2 --2nd Stage heat relay
Y -- 1st stage compressor contactor (controls air conditioning system)
RH -- | 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.) |
RC -- | Power for Cooling system. |
G -- | Fan control relay |
A--3rd wire for 3-wire zoned hot water heating systems
Heat Pump Systems:
C--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.)
B--Changeover valve control (Powered in HEAT) (Note: Never connect B and O terminals together as severe damage to your HVAC system will occur.)
O--Changeover valve control (Powered in COOL) (Note: Never connect B and O terminals together as severe damage to your HVAC system will occur.)
W2 -- | Auxiliary heat/2nd Stage heat relay |
Y -- | 1st stage compressor contactor (controls air conditioning system and 1st stage of heat pump) |
RH -- | 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.) |
G -- | Fan control relay |
| Continued Next Page |
