White Rodgers 1F84-51 specifications Typical wiring diagram for single transformer systems

Page 3

NOTE

The following wiring diagrams show typical terminal identifica- tion and wiring. For proper installation, refer to the original manufacturer's instructions.

NOTE

Relay contacts shown are thermostatically operated.

FAN

AUTO

Heat or Cool

FAN ON

FAN

AUTO

Emer

EMERGENCY

Thermostat

Control

Circuit

MALF

THERMOSTAT

O/B

 

 

Y

 

G

 

W2

 

E

C

L

R

 

 

 

 

 

 

 

 

 

 

 

SYSTEM

 

 

 

 

 

 

SYSTEM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Changeover

 

 

Fan

 

 

 

Emergency

 

 

 

 

 

 

 

 

 

 

 

 

 

MONITOR

 

 

 

 

 

 

 

Relay*

 

 

Relay

 

 

 

Relay

 

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compressor

 

 

 

Aux/Emer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contactor

 

 

 

(Stage 2)

 

 

 

 

 

 

 

 

 

 

Hot

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 VAC

 

 

 

120 VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

* Changeover Relay is energized in COOL when O/B switch is in the “O” position

 

 

 

 

 

 

Neutral

 

 

 

 

 

 

 

 

TRANSFORMER

 

Changeover Relay is energized in HEAT when O/B switch is in the “B” position

 

 

Figure 3. Typical wiring diagram for single transformer systems

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

 

 

 

 

 

24 VAC

120 VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NEUTRAL

 

 

FAN ON

 

 

MALF

 

 

 

 

 

Thermostat

 

 

FAN

 

FAN

 

 

Control

 

 

 

EMERGENCY

Circuit

 

 

AUTO

 

AUTO

 

 

 

 

 

 

 

 

 

Heat

 

Emer

 

 

 

 

 

or Cool

 

 

 

 

 

 

O/B

Y

G

 

W2

E

C

L

Changeover

 

Fan

 

 

Emergency

SYSTEM

 

 

 

 

MONITOR

 

Relay*

Relay

 

 

Relay

SWITCH

 

Compressor

 

 

Aux/Emer

 

 

 

 

 

Relay

 

 

 

 

Contactor

 

 

 

 

 

 

 

 

(Stage 2)

 

 

 

 

 

 

 

 

 

 

THERMOSTAT

R

SYSTEM

Limit or

Safety

Switches

Hot

24 VAC

 

 

 

120 VAC

 

 

 

 

 

TWO COMMONS MUST

* Changeover Relay is energized in COOL when O/B switch is in the “O” position BE JUMPERED TOGETHER! Changeover Relay is energized in HEAT when O/B switch is in the “B” position

Neutral

TRANSFORMER

Figure 4. Typical wiring diagram for two transformer systems with NO safety circuits

 

 

 

FAN ON

 

Thermostat

MALF

 

 

 

 

 

 

 

 

FAN

FAN

 

Control

 

 

 

EMERGENCY

Circuit

 

 

 

AUTO

AUTO

 

 

 

 

 

 

 

 

 

Heat

Emer

 

 

 

 

 

or Cool

 

 

 

 

O/B

Y

G

W2

E

C

L

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

R

SYSTEM

 

 

 

 

 

 

Limit or

 

 

 

 

 

 

 

 

 

 

Limit or

 

 

 

 

 

 

 

Safety HOT

 

Safety

24 VAC

 

Switches

 

 

120 VAC

Changeover

Fan

Emergency

SYSTEM

MONITOR

Switches

NEUTRAL

Relay*

Compressor

Contactor

Relay

Relay

SWITCH

Aux/Emer

Relay

(Stage 2)

TWO COMMONS MUST

BE JUMPERED TOGETHER!

24 VAC

ACCESSORY

RELAY N.O.

CONTACT

COMMON

Limit or

Safety

Switches

Auxiliary

Heating

Transformer

NOTE

The accessory relay scheme is required when safety circuits exist in both systems.

Limit or

Safety

Switches HOT

*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

COMMON

 

24 VAC

120 VAC

NEUTRAL

Heat Pump Transformer

Figure 5. Typical wiring diagram for two transformer systems with safety circuits in BOTH systems

3

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Contents Part no -5739A PrecautionsSpecifications DescriptionAttach Thermostat Base to Wall InstallationEnergy Management Recovery EMR Remove OLD ThermostatTypical wiring diagram for single transformer systems Check Thermostat Operation Terminal Switch SelectionAdjustable Anticipation Armchair ProgrammingThermostat Base Operating FeaturesThermostat Buttons and Switches OperationEntering Your Program Select Heating TemperaturesHeat Temperatures Cool Temperatures Programming Your ThermostatHeating/Cooling Schedule Plan Enter Heating/Cooling Times and Heating TemperaturesCheck Your Programming Select Cooling TemperaturesEnter Cooling Temperatures If the temperature displayed is not the Cool 1, 2, 3, or