Johnson Controls GLAS - Page 14

GLAS Smart Thermostat Technical Bulletin
14
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
C
RRun
Furnace Powered
AUX Device
Heat
Stage 1
W1
RC
RC
C
C
G
Fan
Y1
Cool
Stage 1
HVAC System Control Board
Outdoor AC Unit
Furnace
Figure 5: Traditional AC and Heat
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
Reversing
Valve
HVAC System Control Board
CRC
CRC
GY1 O
Compressor
Stage 1Fan
C
R
Run
Furnace Powered
AUX Device
Heat Pump
Furnace
Figure 6: Heat Pump
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
HVAC System Control Board
Fan
Aux Heat
Stage 1
Compressor
Command
Stage 1
RCC
Reversing
Valve
GW1RCCY1O
CRRun
Furnace Powered
AUX Device
Furnace
Heat Pump
Figure 7: One Stage Heat Pump with One Stage Auxiliary Heat