White Rodgers PART NO. 37-6509A Check Thermostat Operation, Multi-Stage Terminal Outputs

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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.

 

 

 

 

THERMOSTAT TERMINALS (MULTI-STAGE)

 

 

SYSTEM

L

C

R

W2

E/W1

Y2

Y1

G

O

B

Multi-stage

Malfunction

24 Volt

24 Volt

Heat Mode

Heat mode

Cool Mode

Cool Mode

Blower/Fan Energized

Energized

Energized

 

Light

(Common)

(Hot)

2nd stage

1st stage

2nd stage

1st stage

on call for Cool (and

in Cool

in Heat, Off,

 

 

 

 

 

 

 

 

Heat if configured

Mode

Emergency

 

 

 

 

 

 

 

 

to Electric Heat)

 

Modes

 

 

 

 

 

 

 

 

 

 

 

CHECK THERMOSTAT OPERATION

NOTE

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.

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 to adjust thermostat setting above room temperature. The Aux. heating system will begin to operate. The display will show STG1 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 STG 1+2.

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

!CAUTION

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 5 minutes.

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 heat pump system should begin to operate. The display should show STG1. However, if the set point 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 STG 1+2.

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

!CAUTION

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 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 STG1.

3.Adjust temperature setting to 3° below room temperature. The second stage cooling should begin to operate and the display should show STG 1+2.

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

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Contents Preparations Removing OLD ThermostatMounting and Wiring Electric/Gas Switch Fan OptionBattery Location Attach Thermostat Base to WallWiring Diagrams Heat Pump Terminal OutputsCheck Thermostat Operation Multi-Stage Terminal OutputsConfiguration Menu OperationPress Displayed Press or Step Buttons Factory Default This feature not availableConfigurationmenu SpecificationsSecond Stage Time Delay Automatic System ChangeoverTroubleshooting Thermostat Setting Temperature Up KeyTemperature Down Key Why wont my 2nd or