INSTALLER/CONFIGURATION MENU
Select DF setting (dF) – With DF selected On and no outdoor sensor, select the DF setting from
Note: This setting is not minutes or degrees. It is numeric setting that will infl uence the internal thermostat calcula- tion for staging.
Select Compressor Delay (Cd) – After the auxiliary heat is turned on, the compressor(s) shut down is delayed for the time selected (in seconds). This delay is factory set to 60, but can be set in the range of 0 to 99.
27.Select Dual Fuel Feature Using Outdoor Sensor (dF)
– This feature is applicable only in heat pump modes and with an outdoor sensor installed and enabled in step 26. When selected ON, the thermostat will use the outdoor sensor temperature to determine when to switch to gas heat and shut down the compressor.
Select DF setting (dF) – With DF selected ON, select the setting for outdoor temperature. When the outdoor tem- perature goes below the selected temperature, the gas heat will begin. Default is 35°, but can be set in the range of 5° to 50°.
Select Compressor Delay (Cd) – After the auxiliary heat is turned on, the compressor(s) shut down is delayed for the time selected (in seconds). This delay is factory set to 60, but can be set in the range of 0 to 99.
28.Select Auxiliary Off (AO) – Select the temperature that will inhibit the auxiliary heating stage. As long as the out- door temperature is above the selected temperature, the auxiliary heat will not turn on. The default setting is 60°, but can be set in the range of 35 ° to 80°.
29.Not used
30.Select
31.Select Economizer or Damper Operation – This option configures the thermostat A1 terminal for Commercial Occupied Damper systems or Economizer systems. Com- mercial Occupied Damper systems open a damper during all Day (occupied) program time periods. Economizer systems use the A1 terminal to open an economizer and use outside air as the first cooling stage.
Select EC "Off" (Economizer Off) for Commercial Oc- cupied Damper systems that require the A1 terminal to be energized constantly during Day (occupied) program time periods. With EC Off, the cooling terminals and stages operate as follows: Y = Stage 1 cooling, Y2 = Stage 2 cool- ing. A1 is energized constantly during Day (occupied) time periods.
Select EC "On" (Economizer On) for Economizer systems that use outside air for the first stage of cooling. With EC On selected, the cooling terminals and stages operate as follows: A1 = Stage 1 cooling, Y = Stage 2 cooling, Y2
=Stage 3 cooling. EC "On" also runs the first stage of cooling (economizer) longer than a standard (compressor) cooling stage because economizers are more efficient with a longer run time.
32.Change UV Lamp – This feature allows the thermostat
to display the words Change UV Lamp (Call for Service of UV bulb) after a set time of UV bulb operation. This is a reminder to maintain your UV system at optimum level of operation. When enabled, the factory set interval for Change UV Lamp to be displayed is 350 days of UV bulb operation and can be adjusted in 25 day increments. This should be adjusted with respect to the bulb’s recommend- ed maintenance schedule.
When Change UV Lamp is displayed, you can clear it by pressing Clean Display.
33.Select Change Filter Run Time – This feature allows thermostat to display "Change Filter" after a set time of blower operation. This is a reminder to change or clean your air fi lter. This time can be set from 25 to 1975 hours in 25 hour increments. A selection of OFF will cancel this feature. When "Change Filter" is displayed, you can clear it by pressing Clean Display. In a typical application, 200 hours of run time is approximately 30 days.
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