Carrier Comfort TC-WHS01-BLK Installation Instructions Manual page 19

2-stage Boiler
R
C
W2
W1
* Remove RH/RC factory jumper
C terminal to be connected to heating
transformer common
Fig. 9 - Dual Stage Boiler with Fan Coil and Single Stage Cool
Y1
Y2
R
C
G
W2 W
Y2 C RH RC G Y N/C
AUX O/B
17
Fan Coil
1-stage AC
24V
C
A13346