Airxcel Marvair LL357D4 Manual Download Page 5

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LL357D4 PDS, 4.2011

3. 2nd Stage Temperature Differential (1°F to 5°F) (0 .5°C to 2 .5°C)

Set the number of degrees between when stage 1 turns on and when stage 2 turns on. Marvair
recommends 2ºF.

Press the Up or Down button to select differential.

Press the Right button to advance to the next screen.

4. Staged Off Outputs

Select whether the outputs for heating and cooling are staged off independently or are satisfied
simultaneously. Select “1”, outputs staged independently.

1 = outputs staged off independently

0 = outputs off simultaneously

Press the Up or Down button to select.

Press the Right button to advance to the next screen.

5. Minimum Deadband (1°F to 9°F) (1°C to 5°C)

Set the minimum separation between heat setpoint and cool setpoint in Auto Changeover Mode.
Marvair recommends 3ºF.

Press the Up or Down button to set deadband value.

Press the Right button to advance to the next screen.

6. System – Set for heat pump, non-Heat Pump (air conditioner), reversing valve operation and

number of compressors in your system. Set up for “Non-Heat Pump” and Type of
Heat “Electric”.

Press the Up or Down button to select scale.

Press the Right button to advance to the next screen.

Press the Up or Down button to select.

Press the Right button to advance to the next screen.

7. Auxiliary Delay ON – (0-30 minutes)

Set the delay time in minutes for auxiliary heat to be locked out after a call for second stage. This
extra savings feature is used to temporarily lock out auxiliary heat devices, allowing just heat
pump to try to satisfy heat call. Set to 0 minutes.

Press the Up or Down button to select.

Press the Right button to advance to the next screen.

8. Lockout (0-8°, COOL-HEAT)

Select the number of degrees set temperature can be changed during keypad lockout. COOL-
HEAT lockout allows adjustment of the set temperatures to the maximum heat set temperature
selected in Step 9 and minimum cool set temperature selected in Step 10.

Note: The mode cannot be changed when the thermostat is locked.

Press the Up or Down button to select.

Press the Right button to advance to the next screen.

Choose System

Reversing

Valve Active

Number of Compressors

or Compressor Stages

Type of

Heat

Heat Pump