When the batteries are low, the display will flash REPL
ies after removing batteries from thermostat. After 20-30
seconds, it will be necessary to reprogram. REPL BAT
indication will be disappear when thermostat is mounted
back on the powered subbase.
Fig. 9—Mounting the thermostat on subbase.
MOUNTING THE THERMOSTAT
on lower edge until thermostat snaps in place
(Fig. 9B). Open cover and tighten the captive mounting
screws (Fig. 9C).
SETTING DAY AND TIME
Restore 24V power to the thermostat. When power is
applied to the thermostat, the display will read 1:00 PM and
roomtemperature. Itwillgooffforafewseconds, thenbegin
to flash on and off. Set present day and time.
to set the current day. Each press of the
DAY key advances the display one day.
Press TIME AHEAD
to set the current time.
If the display will not come on.
check mounting of thermostat to subbase. If loose or
misaligned, remove thermostat and reinstall on the
subbase, making sure it is firmly attached.
check to see that system power is on.
that crankcase heater be energized several hours
NOTE: When cooling setting is changed, thermostat will
wait up to 5 minutes before turning on the cooling equip-
ment. This delay protects the compressor.
When heating setting is changed, thermostat will wait up
to 5 minutes before turning on the heating equipment. This
delay protects the compressor.
Move the system switch to HEAT and the fan switch to
AUTO. Press WARMER key until the setting is about
Move the system switch to COOL and the fan switch to
AUTO. Press COOLER key until the setting is about
10° F [6° C] below room temperature. The cooling equip-
ment and fan should start. Press WARMER key until the
setting is about 10° F [6° C] above room temperature. The
cooling equipment and fan should stop.
0° F [6° C] above room temperature. Heating should start
and the fan should run (there may be a delay of
NOTE: On an AUTO changeover thermostat, the heating
temperature must be set at least 3° F [1.7° C] below the
cooling temperature, or display will flash.
heating equipment and fan should shut off.
NOTE: On an AUTO changeover thermostat, the cooling
temperature must be set at least 3° F [1.7° C] above the
heating temperature, or display will flash.
The fan should run continuously. When the fan switch is in
the AUTO position, fan cycles with the heating or cooling
INSTALLER SELF-TEST (OPTIONAL)
Do not operate cooling if outdoor temperature is
below 50° F [10° C]. Refer to manufacturer’s
NOTE: Thermostat must have AC power to perform self-