Trane XR302 and XR303 Touchscreen Thermostat
Part No. 37-7760003
09-2018 18-HD48D1-1A-EN 19
8. User Guide - Operating Your Thermostat
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.
To Prevent compressor and/or property damage, if the
outdoor temperature is below 55°F, do not operate the
cooling system.
If at any time your system does not operate properly, contact a
qualified service person.
8.1 Fan Operation
Check thermostat operation. If your system does not have an
indoor fan, skip to
Heating System.
1. Turn on power to system.
2. Press FAN key to ON position. The blower should begin to
operate.
3. Press FAN key to AUTO position. The blower should
stop immediately.
8.2 Heating
1. Press SYSTEM key to select HEAT. If the heating system
has a standing pilot, be sure to light it.
2. Press
to adjust thermostat setting to 1°
above the room
temperature.
3. The heating system should begin to operate if the
compressor lockout time (min. OFF time of 5 minutes is met.
If the minimum time is not met the setpoint temperature will
flash.
4. The display should show “System On”. However, if the
system configuration is set to HP1 or HP2 and setpoint
temperature display is flashing, the 5 minute compressor
lockout feature is operating (see Configuration menu, item
11).
5. Adjust temperature setting to 3° above room temperature.
If your system configuration is set at MS2, HP1 or HP2,
the auxiliary heat system should begin to operate and the
display will show
“System On +2”.
6. Press to adjust the thermostat below room temperature.
The heating system should stop operating.
8.3 Humidifier Optional
To check the humidifier when
System On appears and the heating
system is running press the
HUMIDITY* button once. Press to
adjust the humidity 2% or more above the room humidity level
setpoint range. (Humidity setpoint can be adjusted from 5 to 50%.)
Hum On will appear indicating it is calling for the humidifier.
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8.4 Emergency Mode Applies only to
Heat Pump Systems
Emergency Heat (System EM Position) bypasses the Heat
Pump to use the heat source wired to terminal W/E, W2 on the
thermostat. EM is typically used when compressor operation is
*1. If Auto Schedule is displayed instead of Humidity, Auto Schedule must
be turned off in the Configuration Menu
not desired, or you prefer back-up heat only.
7. Press SYSTEM key to select EM. “EM Heat Mode” will flash
on the display.
8. Press
to adjust thermostat setting above room
temperature. The Emergency heating system will begin to
operate. The display will show “System On” flashing “EM
Heat Mode” and “Heat” to indicate that the Emergency
system is operating.
9. Adjust temperature setting to 3° above room temperature.
Any additional stages of auxiliary heat should begin to
operate and the display will show “System On +2”.
10. Press to adjust the thermostat below room temperature.
The heating system should stop operating.
8.5 Cooling
1. Press SYSTEM to select “Cool”.
2. Press
to adjust the thermostat setting below room
temperature. The blower should come on immediately on
high speed, followed by cold air circulation. The display
should show “System On”. If the setpoint temperature
display is flashing, the compressor lockout feature is
operating (see Configuration menu, item 11).
3. Adjust temperature setting to 3° below room temperature.
The second stage cooling should begin to operate and the
display should show “System On +2”.
4. Press
to adjust the temperature setting above room
temperature. The cooling system should stop operating.
8.6 Cooling Dehumidification
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1. To check the dehumidifier when System On appears and
the cooling system is running press HUMIDITY* button
once. Press
to adjust the humidity 2% or more below the
room humidity level setpoint range. DeHum On will appear
indicating it is calling for the dehumidification.
2. If the room humidity is lower than the adjustment range,
press
to 40% and hold it for four seconds. This will force
the DeHum On for one complete cooling cycle to test the
dehumidification equipment.
3. After adjusting the humidity setting the display will return
to temperature in approximately 10 seconds. To switch the
display back to temperature immediately after adjusting
humidity setting press HUMIDITY again.
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8.7 Choose the Fan Setting
(Auto or On or Prog)
1. Fan Auto/On – Traditional Fan Settings
Press
Fan to select Auto or On. The most commonly
used setting is Auto. Fan Auto runs the fan only when the
heating or cooling system is operating. Selecting
Fan On
runs the fan continuously for increased air circulation or to
allow additional air cleaning if the system is equipped with
an Electronic Air Cleaner.
2. FAN Prog – Comfort Circulating Fan Feature
Pressing FAN until FAN Prog appears activates
the Comfort Circulating Fan Option. This causes the
thermostat to cycle the fan on for 10 minutes and off for
20 minutes if the thermostat has not called for heat or cool
during the past 60 minutes. This assures moderate air
*2. Variable Speed Blower (BK Terminal)
