THERMOSTAT
WIRE COLOR
DESCRIPTION LETTER
CODE
THERMOSTAT AND
FURNACE CONNECTIONS
OUTDOOR UNIT
CONNECTIONS
RED 24 VAC R R N/A
WHITE 1st Stage Electric Heat W1 W N/A
BLACK 2nd Stage Electric Heat W2 W2 * N/A
GREEN Indoor Fan G G N/A
YELLOW Cooling Y Y (Thermostat Only) Y
BROWN 24 VAC Common C C C
THERMOSTAT
WIRE COLOR
DESCRIPTION LETTER
CODE
THERMOSTAT AND
FURNACE CONNECTIONS
OUTDOOR UNIT
CONNECTIONS
RED 24 VAC R R R
WHITE 1st Stage Electric Heat W1 E (Thermostat) W (Furnace) See Outdoor Unit Instructions
BLACK 2nd Stage Electric Heat W2 W2 * See Outdoor Unit Instructions
GREEN Indoor Fan G G N/A
YELLOW Cooling Y Y (Thermostat Only) Y
ORANGE Heat Pump Reversing Valve (Most Brands) O O (Thermostat Only)
O
(See Outdoor Unit Instructions)
BLUE Heat Pump Reversing Valve (Some Brands) B B (Thermostat Only)
B
(See Outdoor Unit Instructions)
BROWN 24 VAC Common C C C
MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TX 76106 Page 18
Table 10: Typical Heat / Cool Low Voltage Wire Color Codes and Connections
* For furnaces with 2-stage electric heat (12kW – 20kW), disconnect BLACK wire (2nd stage heat) from spade terminal on the back of the
LVTB “W” terminal and connect to the wire from the W2 thermostat terminal with a wire nut.
Table 11: Typical Heat Pump Low Voltage Wire Color Codes and Connections
* For furnaces with 2-stage electric heat (12kW – 20kW), disconnect BLACK wire (2nd stage heat) from spade terminal on the back of the
LVTB “W” terminal and connect to the wire from the W2 thermostat terminal with a wire nut.
To Next Page
Loading...