Operating Your Thermostat, Fan Operation

INSTALLER/CONFIGURATION MENU

cally reduces indoor humidity with a call for Cooling if humidity is 2% above setting. Humidity is set by pressing the HUMIDITY key when in the appropriate mode, in this case Cooling, and pressing the or keys to set desired humidity level followed by pressing Humidity key again. This dehumidiﬁcation feature may use more energy by making dehumidiﬁcation a priority initiating a call for cooling if humidity is 2% above desired setting. This feature may also over-cool the condition space by up to 3 degrees to achieve the desired humidity level. (Note: Both dehumidiﬁcation modes operate in Cooling mode only with a call for cooling)

38.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 recom- mended maintenance schedule.

When "Change UV Lamp" is displayed, you can clear it by pressing Clean Display.

39.Change Humidiﬁer Pad – This feature allows the thermo- stat to display the words "Change Pad" after a set time of humidiﬁer operation. This is a reminder to maintain or clean your humidiﬁer. The factory set interval for "Change Pad" to be displayed is 200 hours of humidiﬁer operation. This should be adjusted with respect to the humidiﬁer’s recommended maintenance schedule.

When "Change Pad" is displayed, you can clear it by pressing Clean Display.

40.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 ﬁlter. 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.

OPERATING YOUR THERMOSTAT

Check Thermostat Operation

NOTE

To prevent static discharge problems, touch side of thermostat to release static build-up before touching any keys.

If at any time during testing your system does not operate properly, contact a qualiﬁed service person.

Fan Operation

If your system does not have a G terminal connection, skip to

Heating System.

1.Turn on power to system.

2.Press FAN key to ON position. The blower should begin to operate.

3.Press FAN key to AUTO position. The blower should stop immediately.

!CAUTION

Do not allow the compressor to run unless the com- pressor oil heaters have been operational for 6 hours and the system has not been operational for at least 5 minutes.

Heating/Humidiﬁer

1.Press SYSTEM key to select HEAT. If the auxiliary heating system has a standing pilot, be sure to light it.

2.Press to adjust thermostat setting to 1° above the room temperature. The heat pump system should begin to oper- ate. The display should show "System On". However, if the system conﬁguration is set to HP1 or HP2 and setpoint temperature display is ﬂashing, the 5 minute compressor lockout feature is operating (see Conﬁguration menu, item 11).

3.Adjust temperature setting to 3° above room temperature. If your system configuration is set at MS2, HP1 or HP2, the auxiliary heat system should begin to operate and the display will show "System On +2".

4.Press to adjust the thermostat below room tempera- ture. The heating system should stop operating.

To check the humidiﬁer when System On appears and the heating system is running press the *HUMIDITY button once. Press to adjust the humidity 2% or more above the room humidity level. Hum On will appear indicating it is calling for the humidiﬁer.

*Note: If Auto Schedule is displayed instead of Humidity, Auto Schedule must be turned off in the Conﬁguration Menu.

Emergency Mode

Applies only to Heat Pump Systems

Emergency Heat (System EM Position) bypasses the Heat Pump to use the heat source wired to terminal W/E, W2 on the thermostat. EM is typically used when compressor opera- tion is not desired, or you prefer back-up heat only.

1.Press SYSTEM key to select EM. “EM Heat Mode” will ﬂash on the display.

2.Press to adjust thermostat setting above room tem- perature. The Emergency heating system will begin to operate. The display will show “System On” ﬂashing “EM Heat Mode” and “Heat” to indicate that the Emergency sys- tem is operating.

3.Adjust temperature setting to 3° above room temperature. Any additional stages of auxiliary heat should begin to operate and the display will show "System On +2".