Wiring Diagrams - Robertshaw 9610 User Manual

110-655B.qxd 11/27/06

Wiring Diagrams

The following is just a sample of the most common types of HVAC sys-
tems. Refer to your systems installation manual for wiring information.
HEAT/COOL
4-WIRE
SINGLE TRANSFORMER
Factory-Installed
Jumper
RH
Transformer
RC
Hot
120 VAC 24 VAC
Heating
W
Control
Cooling
Y
Control
B
O
Fan
G
Control
HEAT ONLY
2-WIRE
SINGLE TRANSFORMER
RH
Transformer
Hot
RC
120 VAC 24 VAC
Heating
Control
TWO TRANSFORMER
(HEATING)
Transformer
Hot
120 VAC 24 VAC
Hot
120 VAC 24 VAC
(COOLING)
Transformer
4:38 PM Page 11
HEAT ONLY
3-WIRE
SINGLE TRANSFORMER
T
Transformer
H
Hot
E
120 VAC 24 VAC
R
Heating
Control
M
O
S
T
A
T
Fan
Control
COOL ONLY
3-WIRE
SINGLE TRANSFORMER
NOTE: Cut center of
factory installed jumper
T
and bend back.
Transformer
H
Hot
E
120 VAC 24 VAC
R
W
M
O
Cooling
Y
S Control
T
B
A
O
T
Fan
G
Control
HEAT/COOL
5-WIRE
NOTE: Cut center of
factory installed jumper
and bend back.
RH
T
H
RC
NOTE: Both transformers
E
must be in phase.
R
Heating
W
Control
M
O
Cooling
Y
Control
S
T
B
A
O
T
Fan
G
Relay
11
Factory-Installed
Jumper
RH
T
H
RC
E
R
W
M
O
Y
S
T
B
A
O
T
G
RH
T
NOTE:
H
Cut center
RC
of factory
E
installed
R
jumper
W
and bend
M
back.
O
Y
S
T
B
A
O
T
G