3
AvailableS election:
UseUP and DOWN buttons to changebetween H and C.
Option 13 — Room TemperatureOffset Adjustment
This option allows calibration (or deliberate miscalibration) of the
room temperature sensor. There are various reasons why
homeownersmay want to havedisplayed temperatureadjusted to a
higher or lower value. The selected number is the number of
degrees,plus or minus,which will be added to actualtemperature.
Thenumbers can range between--5 and+5. Factory default is0.
AvailableS election:
Use UP and DOWN buttonsto now move between --5 and +5 in
increments of 1.
Step4 — Thermostat Operation
TemperatureDispla y
Thermostat will displayroom temperature until UP or DOWN
button is pressed.The word SET appears when 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
compressorwill not turn on until the timeguard has expired. The
timeguard affects only compressor operation.Pressing UP and
FAN buttons simultaneously will overridethe timeguard for 1
cycle. With PH or PC selected under Option 01, thistimer is
defeated.
CycleTim er
In normal heatingand cooling operation the thermostatwill not
allowmore than 4 equipment cyclesper hour (or 1 cycle every15
minutes).Both the Y and W outputshave a 15 --minutetimer that
starts countingdown when the output is turned on, (e.g., if Y
output isturned on for 9 minutes and thensatisfies, it cannotturn
back on for another6 minutes regardless of demand). However,
pressing UP and FANbuttons simultaneously or changing the
setpointwill overridethe timer for 1 cycle.
Minimumon Timer
Once the equipment has turned on , 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 between
the first and second stages of heat. The Y o utput will energize first,
then 15 minutes later, W is allowed to come on if the thermostat
determines it is not satisfying the demand.
However, if the heating demand is greater than 5_F, there will be
onlya 30 second delay beforebringing on W.
Auxiliary Heat Indicator
A green LED indicates the use of auxiliary h eato r 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.
Step5 — Check Thermostat Operation
Fan Operation
1. Press FANbutton. This will start continuousfan operation.
FANannunciator willturn on.
2. Press FAN button again. This will stop continuous fan
operation.FAN annunciatorwill turn off.
HeatingOperation
1. Press H/C butto n until HEAT is displayed.
2. Press UP button untilLCD readout reads 3_F above room
temperature.Press UP and FAN buttons simultaneouslyto
defeat timers. Heating system should begin to operate
immediately.
3. For HP thermostatsonly, press H/C button until EMHT
(emergency heat) appears. Press UP and FAN buttons
simultaneously to defeat timers. Emergency heating (W is
ON,Y is OFF) should begin immediately.
CoolingOperation
1. Press H/C butto n until COOL is displayed.
2. Press DOWN button untilLCD readout reads 3_Fbelow
room temperature. Press UP and FAN buttons
simultaneously to defeat timers. Cooling system should
beginto operate immediately.
Table 1 shows the thermostat outputs for each availab le stage of
heating or cooling. It may be useful in checkout or
troubleshooting.
Table1 – Outputs
EQUIPMENT
CONFIGURATION
OPTION#1
THERMOSTAT
FACTORY
CONFIGURATION
COOL
STAGE1
HEAT
STAGE1
HEAT
STAGE2 EMHEAT
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
T1--NAC / T1 --NHP