White Rodgers 1F90W-51 Installation And Operating Instructions Manual page 4

NOTE
All wiring diagrams are for typical systems only. Refer to
equipment manufacturers' instructions for specific sys-
tem wiring information.
Y
G
Figure 4. Typical Wiring Diagram for Heating Only, 2-Wire, Single Transformer Systems
Y
NOTE
RED jumper wire (pro-
vided with thermostat)
must be connected be-
tween thermostat's RH
and RC terminals for pro-
per thermostat operation
with this system.
Figure 5. Typical Wiring Diagram for Heat Only, 3-Wire, Single Transformer Systems
Y G
Cooling Fan
System Relay
Figure 6. Typical Wiring Diagram for Cool Only, 3-Wire, Single Transformer Systems
4
W RC RH
Heating
System
24vAC
JUMPER
WIRE
G W RC
Fan Heating
Relay System
W RC RH
24vAC
!
To prevent electrical shock and/or equipment
damage, disconnect electrical power at the main
fuse box or circuit breaker until installation is
complete.
From 24vAC transformer
THERMOSTAT
SYSTEM
Hot
120vAC
RH
Neutral
Thermostat Terminal Connections
TRANSFORMER
THERMOSTAT
RH
SYSTEM
Hot
24vAC
120vAC RH
Neutral
TRANSFORMER
From 24vAC
transformer
THERMOSTAT
SYSTEM
Hot
120vAC
RH
Neutral
TRANSFORMER
Thermostat Terminal Connections
CAUTION
From heating system
W
RC
G
Y
From 24vAC
transformer
From heating system
W
RC
From fan relay
CONNECT red jumper
wire (provided)
Thermostat Terminal Connections
W
RC
G
Y
From fan relay
From cooling system
G
Y