12
NOTE: Theinstaller can reset the thermostat and bypass the compressor protection
featuresby pressing the RESET button. Thiswill erase all entered programs, current
timeof day, day of week and other user settings and should only be used during
installationfor testing purposes or to reset a thermostat to regain normal operation.
Thiswill return all Thermostat settings to their default values. Theuser will have to
re-programall of the erased settings.
NOTE: Resettingthe thermostat by pressing the RESET button will erase all entered
programs,current time of day,day of week and other user settings.
Thiswill return all Thermostat settings to their default values. Changing˚F / ˚C temperature
scaledefault should be done prior to installation and before any programming to avoid loss
duringreset step.
NOTE: Thisthermostat requires 24 Volt AC power for normal operation and control of
theheating or cooling systems. Thisthermostat also requires two (2) properly installed
"AA"alkaline batteries to retain user settings and programs in the event of loss of AC
Powerdue to power outage or rolling blackouts.
6.5 CompressorProtection cont.6.7 ChangingFahrenheit (°F) to Celsius (°C)6.6 HighTemperature Safety Switch
Whilethe thermostatis in the HEAT mode ofoperation (selector switch in theHEAT position),
thethermostatwill mechanically turn-offif the room temperature raises higherthan 99˚F
(37˚C). There is also a software featurethat will automatically turn-offthe thermostat in
HEATmodeif the temperature raises higherthan 93˚ F (34˚ C).
WARNIN G!
ReadBEFORE proceeding
PressRESET button using a paper clip or a small pencil tip. Thiswill reset the
thermostatand return all settings to their default values. Verifyyour thermostat is
controllingyour system, see TestingYour New Thermostat. Ifthe problems still persist,
calla professional service technician immediately to verify proper system operation.
6.8 LowBattery Detection and Replacement
1.
Releasethe frontthermostat body from the rear thermostatbody by pressing the release
latchon the bottomof the thermostat.
2.
Gentlyseparatethe two thermostat halves and turnthe front thermostat body over exposing
therear view ofthe circuit board.
3.
Locatethe internal˚F / ˚C switch on the circuit board.
4.
Usingyour fingers,gently flip the switchtowards the preferred temperature˚F / ˚C scale.
5.Reattach
thefront thermostatbody by locating the top mountinglugs and swinging the
thermostatdownuntil the release latch locks.
6.
Pressthe RESETbutton on the front of the thermostatusing a paper clip or a small pencil
tip.This will register the new temperaturescale default.
Thisthermostatis equipped with a low battery detectionfeature that constantly monitorsthe
back-upbatteriesduring normal operating modeto determine whether they havesufficient
powerto provideproper back-up operation.

ADDI TIONAL

OPERAT ION FEATUR ES
6cont. .
13
6.9 ResettingThermostat6.8 LowBattery Detection and Replacement cont.
Whenthis featuredetermines that the back-up batteriesstatus is low, lowbattery indicator
willappear in thedisplay. Thethermostatwill continue to functionnormally if AC power is
provided,butit is strongly recommendedto change the back-up batteriesas soon as
possibleto avoidpossible program loss due toAC power outage or rolling blackouts. This
thermostatrequires24 Volt AC Powerfor normal operation and controlof the heating or
coolingsystems.
Replacingthe Back-up Batteries6.8.1
1.
Openfront thermostatdoor and locate the battery compartmentdoor.
2.
Gentlyremovethe two "AA" alkaline batterieslocated in the battery compartment.
3.
Installtwo new"AA" alkaline batteries into batterycompartment. Makesureto match
thepositive(+) ends of the batteries with the positive(+) terminals located in the
batterycompartment.
4.
Closebattery compartmentand verify that the low batteryindicator does not appear in
thedisplay.
TheReset featureallows the user to completely resetthe thermostat to register newmanual
˚F/ ˚C temperaturescale switch settings.
1.
Toeraseall entered programs,current time of day,day of week and other user settings,
gentlypressRESET button using a paper clip ora small pencil tip.
2.
Thiswill returnall Thermostat settingsto their default values and registerall new manual
˚F/ ˚C temperaturescale switch settings.
6.10 Multi-ColoredLED Status Indicators
Thethree multi-colored LED Status Indicatorslocated on the front of your thermostatabove the
displaywillnotify you of key system information.
AUX(Green): This will turn on when the auxiliarysecond stage of heating is active. The
auxiliarystageof heating is usually the least economicalstage of heat.
CHECK(Red):Indicator will activate when a malfunctionoccurs in the heat pumpsystem.
Whenthe lightis active, call a professionalservice technician to verifysystem
performanceandswitch the system to EmergencyHeat Mode if required to
maintainroomtemperature.
EMER(Red): Thisindicatorwill light when youselect Emergency Heat Mode of operationusing
thesystem selectorswitch. Whenyou selectEmergency Heat Mode,the heat
pumpstage of heatis turned off and the emergency(auxiliary) stage of heating is
usedto maintainthe setpoint temperature.

ADDITIONAL

OPERAT ION FEATUR ES
6cont.