O/B

Y

G

W2

E

Changeover

 

 

 

See Note **

 

Fan

 

Emergency

Relay*

Compressor

Aux

Relay

Relay

 

Relay

 

Contactor

 

 

 

 

(Stage 2)

 

 

 

*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

THERMOSTAT

CL R

SYSTEM

SYSTEM

MONITOR

SWITCH

Hot

24 VAC

120 VAC

Neutral

TRANSFORMER

(Class II Current Limited)

Figure 2. 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

O/B

Y

 

G

 

W2

 

 

E

C

 

L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TAPE OFF!

 

 

 

 

 

 

See Note **

 

 

SYSTEM

 

 

 

 

 

 

 

Changeover

 

 

Fan

 

 

 

 

 

 

 

MONITOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Emergency

 

 

 

HOT

 

 

 

Relay*

 

 

Relay

 

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay

 

 

 

 

 

120 VAC

 

 

 

 

24 VAC

 

Compressor

 

 

 

Aux

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contactor

 

 

 

 

 

 

 

 

 

 

 

NEUTRAL

 

 

 

 

 

 

 

 

(Stage 2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

TWO COMMONS MUST

 

 

 

BE JUMPERED TOGETHER!

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

THERMOSTAT

R

SYSTEM

Limit or

Safety

Switches

24 VAC

 

 

 

Hot

 

 

 

120 VAC

 

 

 

 

Neutral

 

 

 

 

 

 

 

 

 

TRANSFORMER

(Class II Current Limited)

Figure 3. Typical wiring diagram for two transformer systems with NO safety circuits

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

O/B

 

Y

 

G

 

W2

 

E

C

 

 

L

R

 

 

 

 

 

 

 

 

SYSTEM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Limit or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

See Note **

 

 

 

 

 

 

 

 

 

Limit or

 

 

 

 

 

 

 

 

 

 

 

 

 

Safety

 

HOT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Safety

 

24 VAC

 

 

 

 

120 VAC

Switches

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SYSTEM

 

 

 

 

Switches

 

 

 

 

 

 

 

 

 

 

 

Changeover

 

 

Fan

 

 

 

Emergency

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NEUTRAL

 

 

 

 

 

 

 

MONITOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay*

 

 

 

Relay

 

 

 

Relay

 

 

SWITCH

 

 

 

 

 

24 VAC

 

 

 

 

Auxiliary

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ACCESSORY

 

 

Heating

 

 

 

 

NOTE

 

 

Compressor

 

 

 

Aux

 

 

 

 

 

 

 

 

 

 

 

RELAY N.O.

 

Transformer

The

 

accessory relay scheme

 

 

 

 

Relay

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contactor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTACT

 

 

(Class II

is

required

when safety

 

 

 

 

 

(Stage 2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current Limited)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COMMON

 

circuits exist in both systems.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TWO COMMONS MUST

 

 

 

 

 

 

Limit or

 

 

 

 

 

 

 

 

 

 

Limit or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BE JUMPERED TOGETHER!

 

 

 

Safety

 

 

 

 

 

 

 

 

 

 

 

Safety

HOT

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

 

 

 

 

 

Switches

24 VAC

 

 

 

 

120 VAC

Switches

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

COMMON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NEUTRAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heat Pump Transformer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Class II Current Limited)

 

 

 

 

 

 

 

 

 

Figure 4. Typical wiring diagram for two transformer systems with safety circuits in BOTH systems

3

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White Rodgers 1F82-261 specifications Thermostat, System

1F82-261 specifications

The White Rodgers 1F82-261 is a programmable thermostat designed to optimize home heating and cooling systems for energy efficiency and comfort. This device is renowned for its user-friendly interface and versatile programming features, making it a popular choice among homeowners seeking to enhance their climate control while potentially reducing energy bills.

One of the main features of the 1F82-261 is its 7-day programmable schedule. This allows users to set different temperature preferences for each day of the week, accommodating unique lifestyles and preferences. With the ability to program multiple hold times throughout the day, homeowners can ensure their living spaces are comfortable when they're home while saving energy when they're away.

The thermostat is equipped with an easy-to-read digital display, which provides clear visibility of the current temperature settings and the programmed schedule. The simplicity of the buttons and menu navigation ensures that users can quickly adjust their settings or program the thermostat without confusion, making it accessible for all members of the household.

In terms of technology, the 1F82-261 integrates advanced temperature control algorithms that enhance the accuracy of heating and cooling cycles. This precision helps maintain a consistent indoor climate, improving comfort while minimizing energy wastage. Additionally, it features a battery backup system that preserves settings in the event of a power outage, ensuring continuous operation and preventing interruption to the programmed schedules.

Another key characteristic of the White Rodgers 1F82-261 is its compatibility with a variety of HVAC systems, including conventional heating systems, heat pumps, and multi-stage setups. This versatility enables a wide range of homeowners to benefit from its efficiency features, regardless of their existing heating or cooling infrastructure.

Furthermore, the thermostat possesses an intuitive “Hold” function, allowing users to override their programmed settings temporarily. This is especially useful for unexpected changes in schedule or when hosting guests, providing flexibility without the need to reprogram the entire week’s schedule.

Overall, the White Rodgers 1F82-261 combines advanced technology, user-friendly features, and robust compatibility, making it an excellent choice for those looking to improve their home comfort efficiency while keeping energy costs manageable. With its seamless integration into various HVAC systems, intuitive operation, and customizable scheduling, it stands out as a formidable option in the thermostat market.