Johnson Controls GLAS Technical Bulletin page 20

Figure 23: C-wire Adapter (Traditional AC and Heat)
GLAS
C AUX
RC G
W1 Y1
W2 Y2
RH O
Y1
W1
RC
G
To GLAS
*Any additional wires should
bypass the C-wire adapter
AUX
Figure 24: C-wire Adapter (Traditional AC)
GLAS
C AUX
RC G
W1 Y1
W2 Y2
RH O
Y1
RC
G
To GLAS
*Any additional wires should
bypass the C-wire adapter
AUX
Figure 25: C-wire Adapter (Heat Pump)
GLAS
C AUX
RC G
W1 Y1
W2 Y2
RH O
Y1
W1
RC
G
To GLAS
*Any additional wires should
O
bypass the C-wire adapter
AUX
GLAS Smart Thermostat Technical Bulletin
Air Handler Control Board
C-wire adapter
Y W O
Y W
Y (1)
W(2)
R (3)
G (4)
Air Handler Control Board
C-wire adapter
Y W O
Y W
Y (1)
W(2)
R (3)
G (4)
Air Handler Control Board
C-wire adapter
Y W O
Y W
Y (1)
W(2)
R (3)
G (4)
20
R G C AUX
R G C
R G C AUX
R G C
R G C AUX
R G C