Johnson Controls GLAS - Wiring and System Activation

GLAS Smart Thermostat Technical Bulletin
19
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
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C
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m
m
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C
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C
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HVAC System Control Board
Heat
Stage 1RC FanC
Reversing
Valve
W2W1RCCGOY1
Cool
Stage 1
Heat
Stage 2
Heat Pump
Figure 20: Heat Pump with Dual-Stage Auxiliary Heat
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 21: Heat Pump with Auxiliary Heat
RH
W2
W1
RC
C
O
Y2
Y1
G
AUX
Air Handler/Cooling
Control Board
CRY1
Boiler/Heat Control Board
CRW1
G
C
R
Run
Furnace Powered
AUX Device
Outdoor AC Unit
Air Handler
Boiler
Figure 22: Traditional Heat with Dual Transformers