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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 dehumidifi cation feature may use more energy
by making dehumidifi cation 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
dehumidifi cation 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.
INSTALLER/CONFIGURATION MENU
When "Change UV Lamp" is displayed, you can clear it
by pressing Clean Display.
39. Change Humidifi er Pad – This feature allows the thermo-
stat to display the words "Change Pad" after a set time
of humidifi er operation. This is a reminder to maintain or
clean your humidifi er. The factory set interval for "Change
Pad" to be displayed is 200 hours of humidifi er operation.
This should be adjusted with respect to the humidifi er’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 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.
OPERATING YOUR THERMOSTAT
If at any time during testing your system does not operate
properly, contact a qualifi ed 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.
To prevent static discharge problems, touch side of
thermostat to release static build-up before touching
any keys.
NOTE
Check Thermostat Operation
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.
CAUTION
!
Heating/Humidifi er
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 confi guration is set to HP1 or HP2 and setpoint
temperature display is fl ashing, the 5 minute compressor
lockout feature is operating (see Confi guration 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 humidifi er 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 humidifi er.
*Note: If Auto Schedule is displayed instead of Humidity, Auto
Schedule must be turned off in the Confi guration 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
fl ash 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” fl ashing “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".
4. Press
to adjust the thermostat below room tempera-
ture. The heating system should stop operating.
To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
CAUTION
!