Installation Guide

KEYPAD LOCKOUT: You can lock the front panel buttons to prevent

unauthorized tampering of your thermostat settings.

NOTE: These keypad lock instructions need to be performed in a timely

manner. The 4-button sequence which locks the thermostat must be entered

within a 10-second timeframe, or the keypad lockout sequence will have to

be entered again from the beginning.

TO LOCK THE KEYPAD: Start with the System Mode switch in either the HEAT

or COOL positions, and the Set Slide switch in the RUN position.

Perform a single press of each button, in the following sequence: NEXT,

NEXT, NEXT, HOLD.

TO UNLOCK THE KEYPAD: Start with the System Mode switch in either the

HEAT or COOL positions, and the Set Slide switch in the RUN position.

Perform a single press of each button, in the following sequence: NEXT,

NEXT, NEXT, HOLD. The padlock should no longer be present, with the

thermostat now unlocked. If the padlock is still on the screen, please try to

enter the 4-button sequence again.

AIR FILTER MONITOR: In most systems that use a blower fan and air ducts,

there is an air filter that is either replaceable or requires cleaning. The filter

is usually located in the air handler, where the blower fan is. This

thermostat feature assists you with keeping track of proper maintenance

and/or periodic replacement intervals for your system’s filter.

The Air Filter Monitor counts the duration of filter usage that has occurred,

since the last time the Filter Monitor has been reset. This feature is for

information purposes only, and does not affect the operation of your heating

or cooling equipment, or the thermostat. When the filter usage duration has

completely expired, the word “FILTER” will flash on the screen.

TO SET THE AIR FILTER DURATION: Move the Set Slide switch to the “AIR

FILTER” position. The word “DAYS” will be shown on the screen, along with

the word “FILTER” and 2-3 characters at the top right corner of the display.

Press either of the UP/DOWN buttons to select the desired filter duration (in

days) from the following choices: OFF, 30, 60, 90, 120, 180, or 365. If the

filter duration value is set to “OFF”, then the Air Filter Monitor will be

completely disabled. Return the Set Slide switch to the RUN position when

you are finished.