6

Reviewing Programs

To review your program settings, press program repeatedly to cycle through the programs.

You can also make changes at any time.

Filter Monitor

Your thermostat measures the number of hours your heating and cooling system has been in use. To maximize your system’s performance and energy efficiency, change or clean your filter regularly.

System Selector Switch

The System Selector switch on the front of the thermostat

system

■ When the total system runtime for heat and cool reaches 400 hours, the Filter Change Indicator will flash as a reminder to check your system’s filter.

M T W TH F SA SU SET TEMP

AM

PM

FILTER

determines the operating mode of the thermostat. You may select COOL, OFF, HEAT.

NOTE: Anytime you install or remove the thermostat from the wallplate, slide the System Selector to the OFF position to prevent the possibility of a rapid system On-Off.

off

heat

cool

■ Press to review total filter usage. After 15

filter

seconds, the display will return to normal mode, or you can press the HOLD / RETURN key to exit immediately.

■ After changing or cleaning the system’s

filter, press and hold the Filter Key for 3

2

COOL TEMP

HR

Fan Switch

seconds. The display will blink, and the

timer will be reset to zero.

MIN

The Fan switch should normally be located in the AUTO

fan

position. The Fan will be turned on along with normal opera-

auto

tion of your system. In a normal gas or oil furnace, the Fan

on

will be turned on by your furnace after its warm-up delay. For

electric heat, air conditioning, and heat pump operation, the

 

Fan will turn on with the system.

 

To run the Fan on continuously, slide the Fan switch to the ON position.

 

Temporary Manual Override

To temporarily change the current set temperature without affecting your program:

SPAN Setting Mode

Your thermostat is set at the factory to cycle at 1˚F (0.5˚C) above and below the set temperature. (Span = 2) This setting has been designed to provide a comfortable room temperature under most all conditions. However, if you find your system cycling too fast or too slow, then the Span can be adjusted to modify the cycle time.

■Press and hold BOTH for three seconds. The

display will flash, and SPAN will be displayed on the LCD.

 

■ Press and hold for about 1 second

or

to enter Manual Override mode. When

 

display flashes, you can release the key.

■Press again to change to your desired Set

or

Temperature. Hold the key for 2 seconds to

 

fast-advance the Set Temperature.

hold

■ Press to return to normal mode, or wait 5

seconds for it to return automatically.

 

/return

■The current program number will flash to signify the Temporary Override.

■At the next program change time, the Tem- porary Override is cancelled, and the next program temperature becomes the setpoint temperature.

To end the Temporary Manual Override:

SET TEMP

3

COOL TEMP

SA

PM

3

COOL TEMP

■ Press to raise the Span to 3. This setting INCREASES the cycle time by allowing your system to run LONGER.

■Press to lower the Span to 1. This setting DECREASES the cycle time by causing your system to run SHORTER.

The Span settings remain the same for both HEAT and COOL.

The Span can be changed at any time, and is independent of program times or temperatures.

When batteries are installed in the thermostat, or the Reset key is pressed, the Span is reset back to setting 2.

Backlighting (INDIGLO® Night-Light)

Your thermostat has an electroluminescent lamp that backlights the display for easy viewing in the dark.

When any key is pressed or the System Switch is changed, the display is illuminated.

■ Press, then press again. This will return the set temperature to the current

hold

program set temperature.

/return

Permanent Override

To hold your Manual Override for vacation or just an extended period of time:

The display will remain illuminated for 5 seconds after the last key is pressed. This allows the light to stay on if you need to operate several keys.

Note: If the thermostat is in Low Battery warning condition, the backlight will not operate. Replace with 2 new alkaline batteries to restore the Backlight function.

Low Battery Warning

hold

■ Press to make the current program tem-

perature the HOLD temperature. HOLD

/return

will be displayed on the LCD, and the

 

 

Program number will disappear.

 

■ Follow the Temporary Manual Override

 

instructions above to change the Permanent

 

Manual Override temperature.

 

■ You can confirm the held set temperature by

 

pressing for less than 1 second.

To end the Permanent Manual Override:

TH

PM

HOLD

TEMP

Your thermostat has a two-stage low battery warning system. When the batteries are first detected to be weak, the first stage low battery warning is indicated by battery symbol flashing on the LCD display. At your earliest convenience, you need to replace the batteries with 2 new AA alkaline batteries.

When the batteries become too weak for normal operation, the thermostat enters the second stage low battery warning which shuts down the thermostat. In this condition, “BATT” flashes alone on the display, and the thermostat will turn your system Off. Your system will remain shut-off until the batteries are replaced.

T

PM

3

HEAT TEMP

hold

■ Press again. The thermostat will return to the current program, and the HOLD

display will be canceled.

 

/return

Note: The thermostat will still keep the current time and your programs in memory until new batteries are installed. After confirming that new batteries have been inserted, the thermostat will return to normal operation.