Johnson Controls GLAS - Page 16

GLAS Smart Thermostat Technical Bulletin
16
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
Furnace
CRRun
Furnace Powered
AUX Device
AUX Device
Heat
Stage 1
W1
RC
RC
C
C
G
Fan
Y1
Cool
Stage 1
AUX
AUX
HVAC System Control Board
Figure 11: Furnace-Integrated Auxiliary Device
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
Humidifier
AUX Device
HUM 1 HUM 2
Switch
Coil
24 VAC
AUX
Relay
RC
RC
C
C
HVAC System
Control Board
Figure 12: Two Wire Auxiliary Device without C Terminal
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
2-Wire AUX Device
RC
RC
HVAC System
Control Board
AUX Device
CAUX
C
AUX
C
C
Figure 13: Two Wire Auxiliary Device with C Terminal