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WHITE-RODGERS 1F86EZ-0251 Emerson Blue Easy Set Thermostat User Manual
Technical Data
Figure 2.Typical wiring diagram for single transformer single stage systems
Optional Jumper for
Single Stage Heat Pump
THERMOSTAT
SYSTEM
R
O/B
Y
G
W
C
Changeover
Relay*
Fan
Optional
Compressor
Contactor
Relay
Heat Relay
Hot
24 VAC
120 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
TRANSFORMER
(Class II Current Limited)
Figure 3.Typical wiring diagram for two transformer single stage systems with NO safety circuits
NOTE
If safety circuits are in only one of
the systems, remove the transformer
of the system with NO safety circuits.
Optional Jumper for
Single Stage Heat Pump
THERMOSTAT
O/B
Y
G
W
C
R
SYSTEM
CUT AND
TAPE OFF!
Changeover
Relay*
Fan
Limit or
Safety
Switches
Optional
Relay
HOT
120 VAC
NEUTRAL
24 VAC
Compressor
Contactor
Heat Relay
Hot
24 VAC
120 VAC
Neutral
TWO COMMONS MUST
BE JUMPERED TOGETHER!
TRANSFORMER
(Class II Current Limited)
* 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
Figure 4.Typical wiring diagram for two transformer single stage systems with safety circuits in BOTH systems
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
Optional Jumper for
Single Stage Heat Pump
to equipment will occur when power is restored.
THERMOSTAT
O/B
Y
G
W
C
R
SYSTEM
Limit or
Safety
Switches
Limit or
Safety
Switches
HOT
24 VAC
120 VAC
Changeover
Relay*
Fan
NEUTRAL
Optional
Relay
24 VAC
Auxiliary
Heating
Transformer
(Class II
Current Limited)
NOTE
ACCESSORY
RELAY N.O.
CONTACT
The accessory relay scheme
is required when safety
circuits exist in both systems.
Compressor
Contactor
Heat
Relay
COMMON
TWO COMMONS MUST
BE JUMPERED TOGETHER!
Limit or
Safety
Switches
Limit or
Safety
Switches
HOT
24 VAC
120 VAC
COMMON
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
Heat Pump Transformer
(Class II Current Limited)
7
| General | Details |
|---|---|
| Name | WHITE-RODGERS 1F86EZ-0251 Emerson Blue Easy Set Thermostat User Manual |
| Make | WHITE RODGERS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.36 MB |
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