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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Emerson 1F82-261 specifications Thermostat, System

1F82-261 specifications

The Emerson 1F82-261 and 1F89-211 are advanced programmable thermostats designed to enhance home comfort, energy efficiency, and convenience. These devices represent the latest in heating and cooling management technology, aiming to provide homeowners with intuitive control over their indoor climate.

One of the primary features of the Emerson 1F82-261 is its user-friendly interface. The large backlit display is easy to read, even in low light conditions. Users can quickly adjust settings, view the current temperature, and access programming options without hassle. Both models come equipped with a touch screen feature, allowing for simple navigation through menus and settings compared to older dial models.

The 1F82-261 model supports up to 2 heating and 1 cooling stages, making it suitable for multi-stage HVAC systems. It is ideal for those looking to optimize home heating or cooling while ensuring comfort. On the other hand, the 1F89-211 is designed for even greater versatility, offering compatibility with up to 2 stages of heating and 2 stages of cooling. This makes it an excellent choice for larger or more complex heating and cooling systems.

A highlight of both thermostats is their programmability. Users can set schedules for different days of the week through a simple programming interface. This feature allows homeowners to reduce energy consumption by adjusting the temperature based on occupancy patterns, ensuring that energy is not wasted while the house is empty.

Another significant technology incorporated into these models is the Smart Response feature. This intelligent technology enables the thermostat to learn the household's heating and cooling patterns, making adjustments ahead of time to reach the desired temperature right when it is needed. This not only enhances comfort but also contributes to energy savings.

Further emphasizing energy efficiency, the Emerson thermostats include an auto-changeover feature for seamless transition between heating and cooling modes, depending on the current temperature. This technology ensures that your home maintains a consistent, comfortable climate throughout varying conditions.

Both models also support Wi-Fi connectivity, allowing for remote access and control via smartphone apps. This feature provides the convenience of monitoring and adjusting home temperatures from anywhere, enabling homeowners to arrive at a perfectly comfortable home after a long day.

In summary, the Emerson 1F82-261 and 1F89-211 combine modern design with intelligent features, making them ideal choices for anyone looking to enhance their home’s comfort and energy efficiency. With easy-to-use interfaces, advanced programmability, and smart technologies, these thermostats provide reliable solutions for efficient climate control.