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7
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 button. The display will show "Fan" and the
blower should begin to operate.
3. Press FAN button again. The display will show "Fan" out-
lined and 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
compressor oil heaters have been operational for 6
hours and the system has not been operational for
at least 5 minutes.
CAUTION
!
Heating System
1. Press the HEAT button 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 room
temperature. The heat pump system should begin to
operate. The display should show “Heat”. 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 7).
3. Adjust temperature setting to 3° above room temperature.
If your system confi guration is set at MS2, HP2 or HP1,
the auxiliary heat system should begin to operate and
the display will show "
Aux
" and "Heat".
4. Press
to adjust the thermostat below room tempera-
ture. The heating system should stop operating.
Auxiliary (Emergency) System
AUX bypasses the Heat Pump to use the heat source wired
to terminal W/E on the thermostat. AUX is typically used
when compressor operation is not desired, or you prefer
back-up heat only.
1. Press and hold HEAT button for at least 5 seconds to
select "AUX".
2. Press to adjust thermostat setting above room tem-
perature. The Auxiliary heating system will begin to oper-
ate. The display will show “AUX” and “HEAT”.
3. Press to adjust the thermostat below room tempera-
ture. The Auxiliary heating system should stop operating.
4. To return to Heat Pump mode press “HEAT” button. "
Aux
"
will dsplay.
To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
CAUTION
!
Cooling System
1. Press A/C button to select A/C.
2. Press to adjust thermostat setting below room tem-
perature. The blower should come on immediately on high
speed, followed by cold air circulation. The display should
show “A/C”. If the setpoint temperature display is fl ashing,
the compressor lockout feature is operating (see Confi gu-
ration menu, item 7).
3. Adjust temperature setting to 3° below room temperature.
The second stage cooling should begin to operate. A click
from the thermostat will be heard to confi rm second stage.
4. Press to adjust the temperature setting above room
temperature. The cooling system should stop operating.
Dual Fuel Temperature Setpoint and
Compressor Delay
When the thermostat is confi gured for Heat Pump mode and
the Dual Fuel feature is selected, the thermostat can use
software logic to determine when to switch to gas heat and
shut down the compressor. This eliminates the need for a
fossil fuel kit.
The user selectable temperature is called the dual fuel tem-
perature setpoint (dF) and is set in the Installer/Confi guration
menu, item 20. A software logic based dual fuel number from
1 to 9 can be selected. A selection of 5 is recommended. A
higher number will provide a larger stage separation. A lower
number will provide a smaller separation.
After the dual fuel temperature setting is selected, press
Menu. A compressor delay (Cd) can be set for compressor
shutdown after the auxiliary stage is energized. This delay
will minimize the time the system may blow cooler air until the
alternate source of heat comes on. Default setting for delay is
60 seconds. This delay can be set from 0 to 99 seconds using
the
or buttons.
Compressor Delay (Cd) will not be available if dF is selected
0 (off).