CHECK THERMOSTAT OPERATION

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 the 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.

Heating System

1.Move SYSTEM switch to HEAT position. If the heating system has a standing pilot, be sure to light it.

2.Press to adjust thermostat setting above room tempera- ture. The heating system should begin to operate.

3.Press to adjust temperature setting below room tempera- ture. The heating system should stop operating.

Cooling System

!CAUTION

This thermostat has a built-in short term (5-minute) time delay. This feature is activated after the compres- sor shuts down and the operator changes the setpoint within the 5-minute time period. During this 5-minute period, the word COOL will flash, indicating that the thermostat has locked out the compressor to allow head pressure to stabilize. This thermostat does not sense AC power loss, and therefore does not activate the short term compressor protection feature when power is restored.

To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.

1.Move SYSTEM switch to COOL position.

2.Press to adjust thermostat setting below room tempera- ture. The blower should come on immediately on high speed, followed by cold air circulation

3.Press to adjust temperature setting above room tem- perature. The cooling system should stop operating.

Before you begin programming your thermostat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons. Your thermostat consists of two parts: the thermostat cover and the base. To remove the

cover, gently pull it straight out from the base. To replace the 1 cover, line up the cover with the base and press gently until the cover snaps onto the base.

OPERATION

2

WHITE-RODGERS

THE THERMOSTAT BASE

Other than and , the following buttons and switches are

located behind the door on the bottom of the thermostat cover (see fig.11). Pull the door down to open it.

The Thermostat Buttons and Switches

 

SET TIME VIEW PRGM RUN PRGM HOLD TEMP

FAN ON AUTO COOL OFF HEAT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

(Red arrow) Raises temperature setting.

2

(Blue arrow) Lowers temperature setting.

3

SET TIME button.

4

VIEW PRGM (program) button.

5

RUN PRGM (program) button.

11

3

4

5

6

9

 

10

 

MO TU WE TH FR

 

HEAT

 

 

 

 

AM

 

 

 

BATTERY

12 13

78

9

SA SU

HOLD COOL

11 14 10

6

HOLD TEMPerature button.

7

FAN switch (ON, AUTO).

8

SYSTEM switch (COOL, OFF, HEAT).

The Display

9 Indicates day of the week.

Figure 11. Thermostat display, buttons, and switches

10HEAT is displayed when the SYSTEM switch is in the HEAT

position. COOL is displayed (non-flashing) when the SYS- TEM switch is in the COOL position. COOL is displayed (flashing) when the compressor is in lockout mode.

11Alternately displays current time and temperature.

12BATTERY is displayed when the 3 “AA” batteries are low and should be replaced. Nothing else will be displayed.

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White Rodgers 7904 specifications Check Thermostat Operation, Thermostat Base

7904 specifications

The White Rodgers 7904 is a versatile and efficient thermostat designed for residential heating and cooling systems. Recognized for its user-friendly interface, the 7904 offers a range of features that enhance comfort while providing energy savings. The device primarily incorporates programmable settings, allowing homeowners to customize their heating and cooling schedules based on their daily routines. With four distinct program periods per day, users can set different temperatures for mornings, days, evenings, and nights, helping to optimize energy usage.

One of the standout technologies in the White Rodgers 7904 is its adaptive intelligent recovery feature. This smart technology learns how long it takes to reach desired temperatures, adjusting the system's start-up time accordingly. This ensures that the home is at the preferred temperature right when residents arrive, without wasting energy by heating or cooling the home too early or too late.

Another important aspect of the 7904 is its compatibility with various HVAC systems, including gas, oil, and electric heating, as well as heat pumps. This flexibility makes it an attractive option for a wide range of households. Moreover, the thermostat supports both single-stage and multi-stage heating and cooling systems, which further broadens its applicability.

The White Rodgers 7904 also features an easy-to-read LCD display that shows the current temperature settings, time, and system status. This intuitive interface simplifies operation, making it easy for anyone to program and adjust settings as needed. The device is backed by a durable design, ensuring longevity and reliability for years to come.

In addition to its programmable capabilities and smart recovery technology, the 7904 includes a built-in filter change reminder. This feature helps homeowners maintain their HVAC systems by notifying them when it's time to replace or clean filters, contributing to optimal system performance and indoor air quality.

Overall, the White Rodgers 7904 is a well-rounded thermostat that combines advanced technology with user-friendly features to provide efficient temperature management. Homeowners looking for a reliable solution to enhance comfort, save energy, and maintain HVAC systems will find the 7904 to be an excellent choice. Its flexibility and ease of use make it a popular option among many households.