Winnebago Ultimate Advantage Owner's Manual page 110

SECTION 8
APPLIANCES & INTERIOR FEATURES
ously at high speed.
Auto/Low: Fan runs at low speed and cycles
on and off with the A/C compressor as con-
trolled by the thermostat.
Auto/High: Fan runs at high speed and
cycles on and off with the A/C compressor as
controlled by the thermostat.
• Adjust the temperature setpoint to personal
preference if needed. See "Changing Tem-
perature Setpoints".
To Run Fan Only (No Heat or Air)
• Set Thermostat switch to OFF.
• Slide Fan Mode switch to On.
• Place Fan Speed switch to Lo or Hi as
desired
• The fan will run continuously at the selected
speed and is not controlled by thermostat set-
ting. The display will show current room
temperature.
HEAT PUMP - Optional
Your coach may be optionally equipped with
an air source heat pump built into the central air
conditioning system. Because the heat pump
operates on electricity, it provides economical
heat inside your coach and helps reduce the use
of LP gas for heating in cooler weather.
A heat pump can be thought of as an air con-
ditioner running in reverse. An air conditioner
absorbs heat from the air inside of the coach and
moves it to the outside. The heat pump does
exactly the opposite. Even cold air contains some
heat, so a heat pump will extract heat from the
outside air on a cold day and carry it to the inside
of the coach to maintain a comfortable tempera-
ture.
The efficiency of a heat pump decreases as the
outdoor air temperature drops, so supplementary
heat is often needed when the outside tempera-
ture nears freezing. This system is set to automat-
ically start the LP gas furnace to assist the heat
pump if room temperature cools to 5 degrees F or
more below the thermostat setpoint. You may
wish to manually switch to furnace heat to main-
tain a higher temperature when outside tempera-
tures begin to reduce the efficiency of the heat
pump. The heat pump will not operate when the
outside temperature falls below 36 degrees F.
8-14
To Operate the Heat Pump:
• Slide the thermostat switch to electric heat
mode.
• If the inside temperature is 5 degrees or more
below the thermostat set point, both the heat
pump and the furnace will run initially to
bring the interior temperature up to the set
point as quickly as possible. (If the inside
temperature is 4 degrees or less below the set
point, then only the heat pump will run ini-
tially.)
• When the thermostat calls for heat again,
only the heat pump will run. The heat pump
will remain the sole heat source unless it
cannot maintain the inside temperature. If
the inside temperature falls five degrees
below the set point, the furnace will assist
the heat pump until the set point is reached.
If the furnace must assist the heat pump three
times in a row, the thermostat will shut down the
heat pump for two hours and the furnace will
take over as the heat source. After two hours the
heat pump will become active again and try to be
the primary heat source.
The furnace acts as a standby heat source if
the outside temperature drops below a point that
the heat pump can no longer extract heat from
the outside air to maintain the desired inside
temperature.
Thermostat Switch
Gas Heat = Furnace Only
Elec Heat = Heat Pump