Electronic Thermostat Installation - Geostar ASTON Series Installation Manual

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