Wiring Diagrams - White Rodgers 1F82-261 Installation And Operation Instructions Manual

O/B
Changeover
Relay*
* Changeover Relay is energized in COOL when O/B switch is in the "O" position
Changeover Relay is energized in HEAT when O/B switch is in the "B" position
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
NOTE
If safety circuits are in
only one of the systems,
remove the transformer
of the system with NO
safety circuits.
CUT AND
TAPE OFF!
HOT
120 VAC 24 VAC
NEUTRAL
* Changeover Relay is energized in COOL when O/B switch is in the "O" position
Changeover Relay is energized in HEAT when O/B switch is in the "B" position
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
Figure 3. Typical wiring diagram for two transformer systems with NO safety circuits
O/B Y G
Changeover Fan
Relay* Relay
Compressor
Contactor
* Changeover Relay is energized in COOL when O/B switch is in the "O" position
Changeover Relay is energized in HEAT when O/B switch is in the "B" position
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
Figure 4. Typical wiring diagram for two transformer systems with safety circuits in BOTH systems
Y G
Fan
Compressor
Relay
Contactor
Figure 2. Typical wiring diagram for single transformer systems
O/B Y
Changeover
Relay* Relay
Compressor
Contactor
W2 E
See Note **
Emergency
Relay
Aux
Relay
(Stage 2)
TWO COMMONS MUST
BE JUMPERED TOGETHER!
W2 E
See Note **
Emergency
Aux
Relay
Relay
(Stage 2)
G W2 E
See Note **
Fan
Emergency
Relay
Aux
Relay
(Stage 2)
TWO COMMONS MUST
BE JUMPERED TOGETHER!
L
C R
SYSTEM
MONITOR
SWITCH
Limit or
Safety
Switches
COMMON
3

WIRING DIAGRAMS

C L
R
SYSTEM
MONITOR
SWITCH
24 VAC
TRANSFORMER
(Class II Current Limited)
THERMOSTAT
C L
R
SYSTEM
Limit or
MONITOR
Safety
SWITCH
Switches
24 VAC
(Class II Current Limited)
NOTE
Polarity must be observed. If the HOT side of
the second transformer is jumpered to the
COMMON side of the first transformer a short
will be made. Damage to equipment will occur
when power is restored.
THERMOSTAT
SYSTEM
Limit or
Safety
24 VAC 120 VAC
Switches
24 VAC
Auxiliary
ACCESSORY Heating
RELAY N.O. Transformer
The accessory relay scheme
CONTACT (Class II
is
Current Limited)
circuits exist in both systems.
COMMON
Switches
24 VAC 120 VAC
Heat Pump Transformer
(Class II Current Limited)
THERMOSTAT
SYSTEM
Hot
120 VAC
Neutral
SYSTEM
Hot
120 VAC
Neutral
TRANSFORMER
Limit or
Safety
HOT
Switches
NEUTRAL
NOTE
required when safety
Limit or
Safety
HOT
NEUTRAL