30
Furnace-Powered Auxiliary Device
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
Furnace
C
R
Run
Fur
nac
e P
ow
ered
AU
X D
evic
e
AUX Device
Heat
Stage 1
W1
RC
RC
C
C
G
Fan
Y1
Cool
Stage 1
AUX
AUX
HVAC System Control Board
GLAS smart thermostat installation instructions -
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2018 Johnson Controls