Temperature Lock-Out; Fahrenheit Versus Celsius; Winterization; Spring Start-Up - Trane TR250 Owner's Manual

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TEMPERATURE LOCK-OUT:

The digital thermostat in this pool heater allows the user to lock the maximum temperature setting allowed.
This feature is useful for preventing unauthorized users from manually adjusting the temperature settings higher
than desired. On a new heater, the maximum allowed temperature lock settings are initially set at the factory to
90°F for POOL mode, and 104°F for SPA mode. To adjust these settings, use the following procedure:
1. Use the MODE button to put the heater in STANDBY mode.
2. Press and hold both the UP and DOWN buttons at the same time.
3. After 3 seconds, the thermostat enters maximum temperature lock adjustment mode.
4. The SPA indicator light illuminates and the numeric display shows the current SPA mode maximum
temperature lock setting. Both the SPA indicator light and the numeric display fl ashes rapidly when in
adjustment mode.
5. Use the UP and DOWN buttons to set the desired maximum temperature lock setting. When fi nished,
press the MODE button.
6. The POOL indicator light illuminates and the numeric display shows the current POOL mode maximum
temperature lock setting. Both the POOL indicator light and the numeric display fl ashes rapidly when in
adjustment mode.
7. Use the UP and DOWN buttons to set the desired maximum temperature lock. When fi nished, press the
MODE button.
8. The heater will return to STANDBY mode.

FAHRENHEIT VERSUS CELSIUS:

The temperature can be displayed in Fahrenheit or Celsius. TO change the display, use the "MODE" button
to place the heater in "STANDBY". Then press and hold the "UP" and "MODE" buttons until the display shows
the °F/°C selection. Press the "DOWN" button to toggle between selections. To accept the selection, press the
"MODE" button. If the user does not act, the selection will be automatically accepted after 60 seconds.

WINTERIZATION:

In moderate climates, the heater can continue to operate during short-term cold spells. Do not use the
heater to maintain the water temperature just above freezing or for freeze protection. Care must be taken to
avoid freeze-up in the heater. When it is used during freezing weather, the pump must run continuously. The
heater is not warranted against freeze-ups. In regions where freezing temperatures are encountered, all water
must be drained from the heater when it is out of service, to prevent damage to the heater and piping. Drain-
ing the heat exchanger is recommended as part of the season's shutdown procedures.
SPRING START-UP – CONSULT A PROFESSIONAL:
1. Inspect and clean the heater, being sure the heater is free of leaves and debris prior to startup.
2. Be sure inlet and outlet piping are properly attached to the heater and the drain valve is closed.
3. Turn the fi ltration system pump "ON" and allow the system to run long enough to purge all the air
from the lines.
4. Turn the gas supply to the heater "ON".
5. Set the temperature control using the keypad to "POOL" or "SPA" and adjust the set point to the
desired temperature setting.
6. If operating diffi culties are encountered, contact a qualifi ed service company for assistance.