Johnson Controls GLAS - GLAS Installation Process; Initial Setup and Mounting

GLAS Smart Thermostat Technical Bulletin
17
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
HVAC System Control Board
C
Heat
Stage 1C
Heat
Stage 2R
W1 W2R
Furnace
C
RRun
Furnace Powered
AUX Device
Figure 14: Dual-Stage Heat
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
HVAC System Control Board
RC
C
Fan
Cool
Stage 2
Cool
Stage 1
RC
C
GY2Y1
C
RRun
Furnace Powered
AUX Device
AC Unit
Air Handler
Figure 15: Dual-Stage AC
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
HVAC System Control Board
W2
Heat
Stage 2
Heat
Stage 1
W1
RC
RC
C
C
Fan
G
Cool
Stage 1
Y1
C
RRun
Furnace Powered
AUX Device
AC Unit
Furnace
Figure 16: Dual-Stage Heat and Traditional AC