A SERVICE OF

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6
Cooling System
1. MoveSYSTEMswitchtoCOOL position.
2. Press to adjust thermostat setting below room
temperature. The blower should come on immediately on
highspeed,followedbycoldaircirculation.However,ifthe
setpointtemperatureis ashing,thecompressor lockout
featureisoperating(seeCongurationmenu,item6).
To prevent compressor and/or property damage, if the
outdoor temperature is below 50
o
F, DO NOT operate
the cooling system.
CAUTION
!
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
!
lockoutfeatureisalreadypresentintheirsystem.Whenthe
thermostatcompressortimedelayoccurs,itwillashthe
setpoint for up to five minutes.
7) Select Backlight Display - The display backlight improves
display contrast inlowlighting conditions.When the“C”
terminal is connected, selecting backlight CdL On will keep
thelightoncontinuously.SelectbacklightOFFwillturnthe
lightonmomentarilywhenanykeyispressed.Whenthe
“C”terminalisnotconnected,regardlessofthebacklight
selection, the light will be on momentarily when any key is
pressed.
8) Select Temperature Display Adjustment 4 LO to 4 HI -
Allowsyoutoadjusttheroomtemperaturedisplayupto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. The
currentoradjustedroomtemperaturewillbedisplayedon
the display.
INSTALLER/CONFIGURATION MENU
9) Select F° or C° Readout - Changes the display readout to
Celsius or Fahrenheit as required.
10) Select Filter Replacement Reminder and Set Run Time
Selectthe“Change Filter” reminder On or OFF. If selected
On,pressRUN/HOLDtoselectthetimeperiodfrom25to
1975hoursin25hourincrements.Inatypicalapplication,
200hours(default)ofruntimeisapproximately30days.
After the selected time of blower operation, the thermostat
will display “Change Filter” as a reminder to change or
cleanyourairlter.When“Change Filter” is displayed,
presstheRUN/HOLDbuttontoclearthedisplayandrestart
the time to the next filter change. A selection of OFF will
cancel this feature.
OPERATION
CHECK THERMOSTAT OPERATION
If at any time during testing your system does not operate
properly, contact a qualified service person.
Turn on power to the system.
Fan Operation
If your system does not have a G terminal connection, skip to
Heating System.
1. MovefanswitchtoON position. The blower should begin to
operate.
2. Move fan switch to AUTO position. The blower should stop
immediately.
Heating System
1. Move SYSTEMswitchto HEAT position. 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 system should begin to operate.
3. Press to adjust temperature setting below room
temperature. The heating system should stop operating.
MANUAL OPERATION
• HOLD TEMPERATURE—WiththeSYSTEMswitchset
to HEAT or COOL,momentarilypressRUN/HOLDbutton.
HOLD will be displayed. Use or  to adjust the
temperature. The thermostat will hold the room temperature
attheselectedsettinguntilyoupressRUN/HOLDbuttonto
start program operation again.
• TEMPERATURE OVERRIDE (TEMPORARY HOLD) —
Press or until the temperature you want is displayed.
The thermostat will override current programming and
keep the room temperature at the selected temperature for
2 hours or until the next program period begins. Then the
thermostat will automatically revert to the program.
3. Press
to adjust temperature setting above room
temperature. The cooling system should stop operating.