Multi-Stage Terminal Outputs

Refer to equipment manufacturers' instructions for specific system wiring information.

You can configure the thermostat for use with either multi-stage electric heat systems or multi-stage gas systems. When con- figured for electric heat, the G terminal (blower/fan) will be energized on a call for heat.

This thermostat is designed to operate a single-transformer system. If you have a two-transformer system, cut and tape off

one transformer. If transformer safety circuits are in only one of the systems, remove the transformer of the system with NO safety circuits. If required, replace remaining transformer with a 75VA Class II transformer. After disconnecting one trans- former, the two commons must be jumpered together.

Use the terminal output information below to help you wire the thermostat properly for your multi-stage system. After wiring, see CONFIGURATION section for proper thermostat configu- ration.

 

 

 

 

THERMOSTATTERMINALS

(MULTI-STAGE)

 

 

SYSTEM

L

C _

R

W2

E/W1

Y2

Y1

G

O

B

Multi-stage

Malfunction

24 Volt

24Volt

HeatMode

Heatmode

CoolMode

CoolMode

Blower/FanEnergized

Energized

Energized

 

Light

(Common)

(Hot)

2ndstage

lststage

2ndstage

lststage

on call for Cool (and

in Cool

in Heat, Off

 

 

 

 

 

 

 

 

Heat if configured

Mode

Emergency

 

 

 

 

 

 

 

 

to Electric Heat)

 

Modes

The24voltneutralconnectiontoterminalC on thethermostatis notrequiredifyou replacethebatteriesonceayearwithfresh"AA"EnergizerRalkalinebattenes.

CHECKTHERMOSTAT OPERATION

To prevent static discharge problems, touch side of thermostat to release static build-up before touching any keys.

If at any time during testing your system does not operate properly, contact a qualified serviceperson.

Fan Operation

If your system does not have a G terminal connection, skip to Heating System.

1.Turn on power to system.

2.Move FAN switch to ON position. The blower should begin to operate.

3.Move FAN switch to AUTO position. The blower should stop immediately.

Do not allow the compressor to run unless the com- pressor oil heaters have been operational for 6 hours and the system has not been operational for at least

5minutes.

Heating System

1.Press SYSTEM button to select the Flame icon (_). If the auxiliary heating system has a standing pilot, be sure to light it.

2.Press (_) to adjust thermostat setting to 1° above room temperature. The heating system should begin to operate. The display should show =STGI". However, if the setpoint temperature display is flashing, the compressor lockout feature is operating (see Configuration menu, item 5).

3.Adjust temperature setting to 3° above room temperature. If your system configuration is set at MS2, HP2 or HP1, the auxiliary heat system should begin to operate and the display should show "STGI+2".

4.Press (_ to adjust the thermostat below room tempera- ture. The heating system should stop operating.

Emergency System

EMER bypasses the Heat Pump to use the heat source wired to terminal E on the thermostat. EMER is typically used when compressor operation is not desired, or you prefer back-up heat only.

1.Press SYSTEM button to select EMER. "EMER" will flash on the display.

2.Press C) to adjust thermostat setting above room temperature. The Aux. heating system will begin to operate. The display will show "STGI" flashing =EMER" and Flame icon (_) to indicate that the Aux. system is operating.

3.Adjust temperature setting to 3° above room temperature. The auxiliary heat system should begin to operate and the display should show "STGI+2".

4.Press Q to adjust the thermostat below room tempera- ture. The Aux. heating system should stop operating.

To prevent compressor and/or property damage, if

the outdoor temperature is below 50°F, DO NOT operate the cooling system.

Cooling System

1.Press SYSTEM button to select the Snowflake icon (,).

2.Press C) to adjust thermostat setting below room temperature. The blower should come on immediately on

high speed, followed by cold air circulation. The display should show "STGI".

3.Adjust temperature setting to 3° below room temperature. The second stage cooling should begin to operate and the display should show "STGI+2".

4.Press C) to adjust the temperature setting above room temperature. The cooling system should stop operating.

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White Rodgers 1F85-277 installation instructions Checkthermostat Operation, Emergency System, Cooling System

1F85-277 specifications

The White Rodgers 1F85-277 is an advanced programmable thermostat known for its versatility, energy-efficiency, and user-friendly design. It stands as a reliable choice for homeowners looking to enhance their heating and cooling systems' functionality while minimizing energy consumption.

One of the key features of the 1F85-277 is its 7-day programmable capability, which allows users to set schedules for different days of the week. This flexibility ensures that the home is heated or cooled according to individual preferences, thereby optimizing energy usage and providing comfort when it’s needed the most. The thermostat can program up to four different temperature settings per day, allowing precise control over home climate conditions.

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The thermostat also integrates advanced technologies, including Smart Recovery. This technology ensures that the home reaches the desired temperature at the programmed time by anticipating how long it takes to heat or cool. By learning from previous system performance, it improves efficiency while maintaining home comfort.

Additionally, the White Rodgers 1F85-277 is compatible with most heating and cooling systems, including gas, electric, and heat pump systems. It supports both single-stage and multi-stage heating and cooling, providing flexibility and compatibility for various home setups.

A significant advantage is its energy-saving features, which can lead to reduced utility bills. By allowing homeowners to schedule their HVAC systems more efficiently, the 1F85-277 plays a crucial role in energy conservation efforts.

Furthermore, installation is straightforward, as the thermostat is designed with a user-centric approach, allowing most homeowners to install it without professional help.

Overall, the White Rodgers 1F85-277 combines advanced technology with practical features, making it an ideal solution for those seeking to improve home comfort while managing energy costs effectively. Its programmable functionality, user-friendly interface, and compatibility with diverse heating and cooling systems make it a standout product in the thermostat market.