3
Available Selection:
UseUP and DOWN buttons to change betweenF and C.
Option 04 — G (fan) ON with W (Heat)Selection
This selectiondetermines whether G (fan) output is to be ON or
OFF when W (fu rnace or strip heat) output is ON. Most furn aces
and fan coils manage their own blowers and do not require a
separate G signal. For these applications, select OFF. Some
auxiliary heaters require a separate G sign al from the thermostat to
turn on the blower. In this case, select ON. Factory default is OF
(off).
Available Selection:
UseUP and DOWN buttons to change betweenON and OFF.
Option 10 — O (reversing valve)O n with HeatorCool Selection
This selectionis only available on heatpump model thermostats.
This selection determines whether th e reversing valve is energized
in the heating or cooling mode. Factory defau ltis C.
Available Selection:
UseUP and DOWN buttons to change betweenH and C.
Option 13 — Room Temperature Offset Adjust-ment
This option allows calibration (or d eliberate miscalibration) of the
room temperature sensor. There are various reasons why
homeownersmay want to have displayedtemperatureadjusted to a
higher or lower value. The selected number is the number of
degrees,plus or minus, whichwill be added to actualtemperature.
The numberscan range between --5 and +5. Factorydefault is 0.
Available Selection:
Use UP and DOWN buttons to now move between--5 and +5 in
increments of 1.
Step 4 — Thermostat Operation
Temperature Display
Thermostat will display room temperature until UP or DOWN
button is pressed. The word SET appearswhen these buttons are
pressed and the current setpoint is displayed. If no buttons are
pressed for 5 sec, the display will change back to show room
temperature.
TimeguardTimer
A 5--minute timeguard is built into the thermostat immediately
upon power up, and any time the compressor turns off. The
compressor willnot turn on until the timeguard has expired. The
timeguard affects only compressor operation. Pressing UP and
FAN buttons simultaneously will override the timeguard for 1
cycle. With PH or PC selected under Option 01, this timer is
defeated.
Cycle Timer
In normal heating andcooling operation the thermostat will not
allowmore than 4 equipment cyclesper hour (or 1 cycle every 15
minutes).Both the Y and W outputs have a 15--minute timerthat
starts counting down when the output is turned on, (e.g., if Y
output is turnedon for 9 minutes and then satisfies, it cannotturn
back on for another 6 minutes regardless of demand). However,
pressing UP and FAN buttons simultaneously or changing the
setpointwill override the timerfor 1 cycle.
Minimum on Timer
Once the equipment has turned o n, it will remain on for a
minimum of 3 minutes regardless of demand. However, the
equipment can turn off in less than 3 minutes if a change in
setpointor a change in mode occurs.
StagingTimer
If the thermostat is a heat pump model, it has 2--stage heat
capability. With HP operation, there is a 15 --minute delay betw een
the first and second stages of heat. The Y outp ut will energize first,
then 15 minutes later, W is allowed to come on if th eth ermostat
determines it is not satisfying the dem and.
However, if the heating demand is greater than 5_F, there will be
only a30 second delay before bringingon W.
Auxiliary Heat Indicato r
A green LED indicates the u se ofau xiliary heat or emergency heat.
ErrorMessages
“----” (two dashes) will be displayed if the thermostat cannot
properly read room temperature. If “----” appears, replace
thermostat.
E4 will be displayed if the thermostat has an internal memory
failure. If E4 appears, replace thermostat.
Step 5 — Check Thermostat Operation
Fan Operation
1. Press FAN button.This will start continuous fanoperation.
FANannunciator will turn on.
2. Press FANbutton again. This will stop continuousfan oper-
ation.FAN annunciator willturn off.
HeatingOperation
1. Press H/C b utton until HEAT is displayed.
2. Press UP button until LCD readoutreads 3_F above room
temperature.Press UP and FAN buttons simultaneously to
defeat timers. Heating systemshould begin to operate im-
mediately.
3. For HP thermostats only, press H/C button until EMHT
(emergency heat) appears. Press U P and FAN buttons sim-
ultaneously to defeat timers. Emergency heating (W is ON,
Y isOFF) should begin immediately.
CoolingOperation
1. Press H/C b utton until COOL is display ed.
2. Press DOWN button until LCD readout reads3_Fbelow
room temperature. Press UP and FAN buttons simultan-
eouslyto defeat timers.Cooling system should begin to op-
erate immediately.
Table 1 shows the thermostat outpu tsfo r each available stage of
heating or cooling. It may be useful in checkout or
troubleshooting.
Table1 – Outputs
EQUIPMENT
CONFIGURATION
OPTION #1
THERMOSTAT
FACTORY
CONFIGURATION
COOL
STAGE 1
HEAT
STAGE 1
HEAT
STAGE 2 EM HEAT
AC, PC AC, HP Y, G W--- --- --- ---
HP,PH
RVS = C HP Y,G , O/ B Y, G Y, G , W W
HP,PH
RVS = H HP Y, G Y, G, O/ B Y,G , W, O/ B W