Wiring diagrams, Heat only single transformer 2-wire, Heat only single transformer 3-wire – Robertshaw 8405-1 User Manual
Page 5: 750 system millivolt
5
Hot
Heating
Control
Transformer
24 VAC
120 VAC
HEAT ONLY
SINGLE TRANSFORMER
2-WIRE
RH
RC
W1
G
Factory-Installed
Jumper
T
H
E
R
M
O
S
T
A
T
Hot
Heating
Control
Fan
Control
Transformer
24 VAC
120 VAC
HEAT ONLY
SINGLE TRANSFORMER
3-WIRE
RH
RC
W1
G
Factory-Installed
Jumper
T
H
E
R
M
O
S
T
A
T
Pilot
Generator
Gas valve
TT
250-750
SYSTEM
MILLIVOLT
RH
RC
W1
G
Factory-Installed
Jumper
T
H
E
R
M
O
S
T
A
T
PP
TT
PP
♦
Wiring Diagrams
110-1161.qxd 6/9/05 10:41 AM Page 5
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