RC

NOTE

All wiring diagrams are for typical systems only. Refer to equipment manufacturers' instructions for specific sys- tem wiring information.

!CAUTION

To prevent electrical shock and/or equipment damage, disconnect electrical power at the main fuse box or circuit breaker until installation is complete.

THERMOSTAT

Y

G

W

RC

RH

SYSTEM

Heating

System

Hot

 

 

 

 

 

 

 

 

 

 

 

24vAC

 

 

 

 

 

 

 

120vAC

 

 

 

 

 

 

 

 

 

 

Neutral

TRANSFORMER

From heating system

From 24vAC transformer

W

W

RC

G

RH

Y

RH Manual background

Thermostat Terminal Connections

Figure 4. Typical Wiring Diagram for Heating Only, 2-Wire, Single Transformer Systems

Y

NOTE

RED jumper wire (pro- vided with thermostat) must be connected be- tween thermostat's RH and RC terminals for pro- per thermostat operation with this system.

G

Fan

Relay

JUMPER

WIRE

THERMOSTAT

W

RC

RH

SYSTEM

Heating

System

Hot

 

 

 

 

 

 

 

 

 

24vAC

 

 

 

 

 

 

120vAC

 

 

 

 

 

 

 

 

 

Neutral

TRANSFORMER

From 24vAC

transformer

From heating system

W

W

RC

 

G

G

RH

Y

RH

From fan relay

CONNECT red jumper

wire (provided)

Thermostat Terminal Connections

Figure 5. Typical Wiring Diagram for Heat Only, 3-Wire, Single Transformer Systems

 

 

 

 

 

 

From 24vAC

 

 

 

 

 

 

 

 

transformer

 

 

Y

G

W

RC

RH

THERMOSTAT

 

 

W

SYSTEM

 

 

 

 

 

 

 

 

 

RC

Cooling

Fan

 

 

 

 

 

 

 

 

 

 

 

 

G

System

Relay

 

 

 

 

RC

G

 

 

 

 

 

Hot

 

Y

 

 

 

 

 

 

Y

 

 

 

 

 

 

 

 

 

 

 

24vAC

120vAC RH

 

 

From fan relay

 

 

 

 

 

Neutral

 

From cooling system

 

 

 

 

TRANSFORMER

Thermostat Terminal Connections

 

 

 

 

 

 

Figure 6. Typical Wiring Diagram for Cool Only, 3-Wire, Single Transformer Systems

4

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White Rodgers 1F90W-51 installation instructions Rc G

1F90W-51 specifications

The White Rodgers 1F90W-51 is a sophisticated thermostat designed for modern heating and cooling systems, offering homeowners a blend of convenience, energy efficiency, and advanced technology. This programmable thermostat is well-regarded for its user-friendly features and ease of installation, making it a popular choice among DIY enthusiasts and professionals alike.

One of the standout features of the White Rodgers 1F90W-51 is its ability to provide precise temperature control. It supports a 7-day programming schedule, allowing users to set different temperatures for each day of the week, maximizing comfort while minimizing energy usage. This feature is particularly beneficial for families with varying schedules, enabling them to maintain optimal home temperatures when they are present and reduce heating or cooling when the house is empty.

The 1F90W-51 incorporates advanced technology that allows for compatibility with a wide range of HVAC systems, including conventional heating and cooling setups, heat pumps, and even multi-stage systems. The thermostat's digital display makes it easy for users to read and adjust settings, while its intuitive interface simplifies programming and operation.

In terms of efficiency, the White Rodgers 1F90W-51 is designed to help homeowners save on energy bills. By allowing for precise temperature adjustments and programmable schedules, it encourages users to optimize their heating and cooling usage. This not only protects the environment by reducing energy consumption but also translates to cost savings over time.

Another notable characteristic of the 1F90W-51 is its built-in temperature hold feature, which allows users to override the programmed settings temporarily. This is useful for occasions when unexpected changes in schedule may require a quick adjustment without the need to reprogram the entire unit.

In addition to functionality, the White Rodgers 1F90W-51 boasts a sleek design that blends seamlessly into any home décor. Its compact size and classic appearance allow it to fit well in various locations throughout the house.

Overall, the White Rodgers 1F90W-51 is a reliable and feature-rich thermostat that provides users with the tools needed to enhance their home comfort while remaining conscious of energy consumption. Its combination of programmability, compatibility, and user-friendly design makes it a top choice for those seeking an efficient and effective climate control solution.