Ecobee EMS Si - Page 24

19
YN/C
W
O/B
GRCRHCY2R1+R1-R2+R2-
W2
AUX
EMS Si Thermostat
2-stage AC
C
2-stage Boiler
C
W2
W1
R
Y1
RR
C
Y2
Y1
Y2
G
Air Handler
Dual stage boiler with air handler, dual stage cool
* Remove RH/RC factory jumper
C terminal to be connected to heating
transformer common