Installation Guide

60
With one accessory wire (humidifier/dehumidifier/ventilator)
Furnace Control
Board
Accessory
RCGYWWire 1
Rc
R
H
G
Y1
Y2
W1
W2
O/B
GK/
C
YK
ACC-
ACC+
Note:
• If there is only one accessory wire, connect it to the ACC+ terminal on the
Thermostat to control the accessory.
• Do not connect any jumper wire between R
C and RH terminals.
• Refer pages 22 or 43 for details on setting the jumpers on the Thermostat.
Warning! If you connect the accessory wire to the ACC- terminal, it may
damage your Thermostat or HVAC system.
YK, GK:
Used for C-Wire Kit
connections only
Place the black jumper at the back of your
Thermostat as illustrated.
Black jumper