Installation manual

12
5 SERIES 500RO11 INSTALLATION MANUAL
Thermostat Wiring for Dual Fuel Applications
Thermostat Wiring
Electronic Thermostat Installation cont.
Y1
Y2
O
R
C
C
R
Air Handler
Thermostat
24 VAC
Common Common
24 VAC
Reversing Valve
2nd Stage Compressor
1st Stage Compressor
Y1
Y2
O
R
C
G
G
Fan
W
W
P1
Air Handler transformer must be at least 75 VA.
L
Lo
Fault Signal
5 Series Split
Y1
Y2
O
R
C
L
C
R
Fossil Fuel
Furnace
Thermostat
24 VAC
Common Common
24 VAC
Fault Signal
Reversing Valve
2nd Stage Compressor
1st Stage Compressor
Y1
Y2
O
R
C
LO
G
G
Fan
W
W
Auxiliary Heat Relay
Note: Field installed SPST dual fuel relay
(Required for dual fuel installation)
Auxiliary Heat Relay
P2
P1
Shut
Down
= chassis
5 Series Split
Auxiliary
Heat Relay
or use TP32U03 or TP32U04