16
YN/C
W
O/B
GRCRHCY2
W2
AUX
1-stage AC
C
24V
2-stage Boiler
C
W2
R
W1
Y1
R
C
Y2
G
Air Handler
Smart Si Thermostat
Dual stage boiler with air handler and single stage cool
* Remove RH/RC factory jumper
C terminal to be connected to heating
transformer common
