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, pull it straight out from the base. To replace the cover, line up the cover with the base and press until the cover snaps onto the base.
The Thermostat Buttons and Switches
1Raises temperature setting
2Lowers temperature setting.
3FAN switch (ON, AUTO)
4SYSTEM button (COOL, AUTO, HEAT, EMER, OFF)
The Display
5Flame icon (
) is displayed when the system is in HEAT mode. Snowflake icon (
) is displayed when the system is in COOL mode. Flame icon (
) and Snowflake icon (
) are displayed simultaneously when thermostat is in AUTO mode.
6Displays BATT when the 2 "AA" batteries are low and should be replaced. Only BATT and LO are displayed when batteries are low with no system power.
7Displays current temperature or LO when batteries are low.
8Displays currently programmed set temperature (this is blank when SYSTEM is OFF).
9Displays FLTR when the system has run for the programmed filter time period as a reminder to change or clean your filter.
10Display (
) when in keypad lockout mode.
OPERATION
STG1+2
FAULT
EMER 
Figure 6 – Thermostat display, buttons and switches
11EMER is displayed flashing when the system is in EMER mode.
12Indicates a fault in the heating/cooling system. It does not indicate a fault in the thermostat.
13Display (
) when limited range is activated.
14Stage1 & 2 indicators: The thermostat shall indicate when the first and second stage is energized except in emergency mode. The icon is STG 1 for the first stage energized. The icons for the first and second stage energized are STG1+2 located in the upper right side of the display.
The configuration menu allows you to set certain thermostat operating characteristics to your system or personal require- ments.
Set SYSTEM button to OFF, then simultaneously press
and 
to enter configuration menu. The display will show the first item in the configuration menu.
The configuration menu table summarizes the configuration options. An explanation of each option follows.
Press SYSTEM to change to the next menu item. To exit the menu and return to the program operation, press RUN. If no keys are pressed within fifteen minutes, the thermostat will revert to normal operation.
1)Single Stage,
CONFIGURATION MENU
2)Fast or Slow Cycle Selection – The factory default setting is fast cycle, which cycles 1st stage at approximately 1.2°F and 2nd stage 0.75°F. If you prefer slow cycle, press the temperature key to change to SL. The 1st stage and 2nd stage would be 1.5°F and 1.2°F respectively.
3)Select Compressor Lockout CL OFF or ON – Selecting CL ON will cause the thermostat to wait 5 minutes before turning on the compressor if the heating and cooling system loses power. It will also wait 5 minutes minimum between cooling and heating cycles. This is intended to help protect the compressor from short cycling. Some newer compres- sors already have a time delay built in and do not require this feature. Your compressor manufacturer can tell you if the lockout feature is already present in their system. When the thermostat compressor time delay occurs it will flash the setpoint for about five minutes.
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