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 Change Indicator

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

determines the operating mode of the thermostat. You may

heat

select COOL, OFF, HEAT.

off

NOTE: Anytime you install or remove the thermostat

cool

from the wallplate, slide the System Selector to the

 

OFF position to prevent the possibility of a rapid sys-

 

tem On-Off.

 

■ 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.

■ After changing or cleaning the system’s

filter

filter, press and hold the Filter Key for 3 seconds. The display will blink, and the timer will be reset to zero.

M T W TH F SA SU SET TEMP

AM

PM

FILTER

2

COOL TEMP

Fan Switch

The Fan switch should normally be located in the AUTO posi-

fan

tion. The Fan will be turned on along with normal operation of

auto

your system. In a normal gas or oil furnace, the Fan will be

on

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:

Note: Pressing the Filter Key at any time for less than 3 seconds will cause the Filter indicator to appear on the LCD. This is only to confirm key operation, and the timer is not affected unless the key is held for greater than 3 seconds.

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.

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

hold

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

program set temperature.

 

operate. Replace with 2 new alkaline batteries to restore the Backlight function.

/return

Permanent Override

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

Low Battery Warning

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 conve-

T

PM

hold

/return

■ Press to make the current program tem-

perature the HOLD temperature. HOLD

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

TH

PM

HOLD

TEMP

nience, 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.

3

HEAT TEMP

pressing for less than 1 second.

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.

To end the Permanent Manual Override:

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

hold

display will be canceled.

/return