Johnson Controls GLAS Installation Instructions Manual page 21

Heating and Cooling without C-wire (Optional AUX)
C
RC
W1
W2
RH
20
GLAS
AUX
G
Y1
Y2
O
Y1
W1
WIRES IN WALL
TO GLAS DEVICE
RC
G
To GLAS
*Any additional wires should
bypass the C-wire adapter
AUX
C-wire adapter
Y (1)
W(2)
R (3)
G (4)
GLAS smart thermostat installation instructions -
Air Handler Control Board
Y W O R G C AUX
Y W R G C
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