Wiring Diagrams; Cool Only - Robertshaw 8400 User Manual

Wiring Diagrams

♦
HEAT/COOL
4-WIRE
SINGLE TRANSFORMER
Transformer
Hot
24 VAC
120 VAC
HEAT ONLY
2-WIRE
SINGLE TRANSFORMER
Transformer
Hot
24 VAC
120 VAC
Factory-Installed
Jumper
RH
T
H
RC
E
R
Heating
W1
Control
M
O
Cooling
Y1
S
Control
T
Fan
A
G
Control
T
O
B
RH
T
RC
H
E
Heating
W1
Control
R
M
Y1
O
S
G
T
O
A
T
B
HEAT ONLY
SINGLE TRANSFORMER
Transformer
Hot
24 VAC
120 VAC

COOL ONLY

SINGLE TRANSFORMER
Transformer
Hot
24 VAC
120 VAC
5
3-WIRE
Factory-Installed
Jumper
RH
RC
Heating
W1
Control
Y1
Fan
G
Control
O
B
3-WIRE
NOTE: Remove factory
installed jumper
RH
RC
W1
Cooling
Y1
Control
Fan
G
Control
O
B
T
H
E
R
M
O
S
T
A
T
T
H
E
R
M
O
S
T
A
T