Publicité
Les langues disponibles
Les langues disponibles
All manuals and user guides at all-guides.com
110-1103B.qxd
3/14/05
Wiring Diagrams
The following is just a sample of the most common types of HVAC
systems. Refer to your system's installation manual for wiring information.
HEAT/COOL
4-WIRE
SINGLE TRANSFORMER
R
Transformer
Hot
C
24 VAC
120 VAC
Heating
W1
Control
Cooling
Y1
Control
Fan
G
Control
O
B
HEAT ONLY
2-WIRE
SINGLE TRANSFORMER
R
Transformer
C
Hot
120 VAC
24 VAC
Heating
W1
Control
Y1
G
O
B
HEAT PUMP WITH
COOL ACTIVE
REVERSING VALVE
R
Transformer
C
Hot
120 VAC
24 VAC
W1
Compressor
Y1
Contactor
Fan
G
Relay
Reversing
O
Valve
B
NOTE: Make sure the HP switch is in the HP position.
When switched to HP mode,
W1 is connected internally to Y1.
2:31 PM
Page 5
HEAT ONLY
3-WIRE
SINGLE TRANSFORMER
T
Transformer
H
Hot
E
120 VAC
24 VAC
R
Heating
Control
M
O
S
T
Control
A
T
COOL ONLY
3-WIRE
SINGLE TRANSFORMER
Transformer
T
Hot
H
24 VAC
120 VAC
E
R
Cooling
M
Control
O
S
Control
T
A
T
HEAT PUMP WITH
HEAT ACTIVE
REVERSING VALVE
T
Transformer
H
Hot
E
120 VAC
24 VAC
R
Compressor
M
Contactor
O
S
T
A
T
Reversing
NOTE: Make sure the HP switch is in the HP position.
When switched to HP mode,
W1 is connected internally to Y1.
5
R
T
H
C
E
R
W1
M
O
Y1
S
T
Fan
G
A
T
O
B
R
T
C
H
E
W1
R
M
Y1
O
S
Fan
G
T
O
A
T
B
R
T
H
C
E
W1
R
M
Y1
O
Fan
S
G
Relay
T
A
O
T
B
Valve
Publicité
