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6
Thermostat Operation
The thermostat is pre-set and locked at the factory. When locked the keypad is
disabled and changes to the settings cannot be made. To change the settings the
lockout switch must be placed in the unlock position.
To access the lockout switch:
1. Switch off the power.
2. Remove the four screws and cover.
3. Slide the lockout switch to the right to the unlock position.
4. Replace the cover.
5. Re-power the system.
6. To program refer to table below.
Step Display Description
1 F or C Fahrenheit or Celsius Scale
Press the set key once to access the Fahrenheit / Celsius
scale. The display will show the current status, either F for
degrees Fahrenheit or C for degrees Celsius. The
thermostat has been pre-set at the factory for Fahrenheit.
Press the up or down arrow key to choose between the F
and C.
2 S1 (blinking) Setpoint Temperature
Press the set key again to access the setpoint. The display
will show the current set point. The setpoint has been pre-
set to 0 degrees F. Press either the up or down arrow key
to change the setpoint to the desired temperature.
3 DIF 1 (blinking) Differential Temperature
Press the set key again to access the differential. The
display will show the current differential. The differential
temperature has been pre-set at 5 degrees F. Press either
the up or down arrow key to increase or decrease the
differential setting.
4 C1 / H1 Cooling or Heating Mode
Press the set key again to access the heating or cooling
mode. The display will show the current mode. C1 for
cooling or H1 for heating. The Thermostat has been pre-
set for C1. Do not change this setting. The BF does not
work in heat mode. Press the set key once more and
programming is complete.
Note: Pressing the set key accepts the setting and brings you to the next step. You
must push the set key through all steps to return to the temperature display to allow the
compressor to operate.