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2) Select FA or SL (Fast or Slow) Heating Cycle Rate - The
FA setting is frequently used for gas, oil or electric heat. The
SL setting produces a longer heating cycle which is normally
for hot water or steam (hydronic) systems. Both settings
produce very accurate temperature control and can be set
to your personal preference. FA cycles the system just under
1°F and the SL setting cycles at approximately 1.5°F.
3) Select Display Backlight (d-L OFF or ON) - The display
backlight improves display contrast in low lighting conditions.
Selecting backlight ON will keep the light on for a short period
of time after any key is pressed. Selecting OFF will keep the
light off.
4) Select filter replacement run time - The thermostat will
display "FILTER" after the selected time of operation. This is
a reminder to change or clean your air filter.This time can be
set from 0 to 1950 hours in 50 hour increments. A selection
of 000 will cancel this feature. When "FILTER" is displayed,
you can clear it by pressing
This resets the timer and starts counting the hours until the
next filter change.
5) Select Compressor Lockout (LOC OFF or ON) - Selecting
LOC 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 cycles. This is intended to help protect the compres-
sor from short cycling. Some newer compressors already
have a time delay built in and do not require this feature.
Your compressor manufacturer can tell you if the feature is
already present in their system. When the compressor time
delay occurs it will flash the (snowflake icon) for about five
minutes then turn on the compressor.
6) Select Temperature Display Adjustment (4 LO to 4
HI) - Allows you to adjust the room temperature display 4°
higher or lower. Your thermostat was accurately calibrated
at the factory but you have the option to change the display
temperature to match your previous thermostat.
7) Select Temperature DIsplay (°F or °C) - Changes the display
readout to Celsius or Fahrenheit as required.
OPERATING FEATURES
Now that you are familiar with the thermostat buttons and display,
read the following information to learn about the many features
of the thermostat.
• SIMULTANEOUS HEATING/COOLING SETPOINT STOR-
AGE — You can enter both your heating and cooling set
points at the same time. There is no need to change the
thermostat at the beginning of each season.
• CONFIGURATION MENU — Allows you to customize
certain thermostat options.
and
at the same time.
5
SETTING THE THERMOSTAT
This thermostat is very easy to operate. Set the SYSTEM
switch to either HEAT or COOL then press
temperature you want to maintain is shown on the right side
of the display. If you want to turn the system off, just move the
SYSTEM switch to OFF.
The FAN switch controls the fan operation. When the FAN
switch is set to AUTO, the fan will cycle with the furnace or air
conditioner. When the FAN switch is set to ON, the fan will run
continuously, regardless of SYSTEM switch position.
TROUBLESHOOTING
No Heating
With the SYSTEM switch set to HEAT, when the setpoint
temperature is raised or lowered past the room temperature,
the thermostat will make a soft click sound. Usually, the sound
indicates the thermostat is operating correctly. If the system
does not come on, check the system or contact your heating/
cooling service person. If the thermostat does not click try the
Reset Operation listed below.
No Cooling
Same procedure as heating except set SYSTEM switch to COOL.
There can be up to a 5 minute compressor lock-out time delay
before the thermostat clicks in COOL.
Blank Display
A blank digital display usually indicates the thermostat has
received a voltage spike, static discharge or requires new bat-
teries. If the display remains blank after replacing the batteries,
see Reset Operation below.
Reset Operation
If a voltage spike or static discharge blanks out the display or
causes erratic thermostat operation you can reset the thermostat
and move the SYSTEM switch from OFF to
by pressing
,
HEAT at the same time. This also resets the factory defaults
to the configuration menu. If the thermostat has power, has
been reset and still does not function correctly contact your
heating/cooling service person or place of purchase.
OPERATION
or
until the
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