Johnson Controls GLAS - Page 27

26
Traditional Heat
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
NOTE: When there is only
one transformer, the RC terminal
is used.
NOTE: Forced air heating systems
often have a G wire to run the fan
independently, but not all systems
use a G wire.
Furnace
C R Run
Furnace Powered
AUX Device
HVAC System
Control Board
Heat
Stage 1C RC
RC W1
C
GLAS smart thermostat installation instructions -
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2018 Johnson Controls