Maintenance; Operating Instructions - Dometic B3351.531 Installation & Operating Instructions Manual

FIG. 20
CONTROLS
A. The Selector Switch has 10 positions including "OFF".
This controls fan speed, heating mode, and cooling
modes. See FIG. 20.
B. The Thermostat controls the temperature range from 18
C on the coldest side to 32
cooling mode, the compressor ON/OFF controlled by
the thermostat setting.
COOLING OPERATION
A. Set the thermostat at the desired temperature level.
B. Select the fan speed that best satisfies your needs:
1. HIGH COOL: Selected when maximum cooling and
dehumidification required.
2. MED. COOL: Selected when normal or average
cooling required.
3. LOW COOL: Selected when room at desired
comfort level and needs to be maintained. Normally
this speed used for night time operation.
Note: The blower runs continuously to circulate air and
maintain an even temperature. The compressor will come on
as cooling is required to maintain the selected temperature
level.
1. AIR FILTER:
Periodically remove the return air filter located above the
removable grille in the air box. Wash the filter with soap
and warm water, let dry and then reinstall.
Note: Never run the air conditioner without return air filter in
place. This may plug the unit evaporator coil with dirt and may
substantially affect the performance of the unit.
2. AIR BOX HOUSING:
Clean air box housing and control panel with a soft cloth
dampened with a mild detergent. Never use furniture
polish or scouring powders.
3. FAN MOTOR:
Factory lubricated and requires no service under normal
use.
INSTALLATION AND OPERATING INSTRUCTIONS

OPERATING INSTRUCTIONS

COOL
LOW
MED
HIGH
LOW
°
C on the warmest side. In the

MAINTENANCE

OFF
FAN WARMER
HIGH
MED
LOW
HIGH
HEAT
MED
COOLER
Note: This electric heater will not replace a furnace for
heating your RV in cold weather. The intent is to remove the
chill on cool days or mornings.
°
A. Turn the thermostat to the desired temperature setting.
B. Select the fan speed that best satisfies your needs:
1. HIGH HEAT: Selected when maximum heating
is required,
2. MEDIUM HEAT: Selected when normal or average
heating is required
3. LOW HEAT: Selected when room at desired com-
fort level and needs to be maintained.
A. This will circulate the air in your RV without cooling or
heating. There are three positions: HIGH FAN, MED.
FAN or LOW FAN to select from, depending upon
personal choice.
A. This is to turn Unit off.
4. FROST FORMATION ON COOLING COIL:
Under certain conditions, frost may form on the evapo-
rator coil. If this should occur, inspect the filter and
clean if dirty. Make sure air louvers are not obstructed.
Air conditioners have a greater tendency to frost when
the outside temperature is relatively low. This may be
prevented by adjusting the thermostat control knob to a
warmer setting (counter clockwise). Should frosting
continue, operate on LOW, MED. or HIGH FAN setting
until the cooling coil is free of frost.
9
®
HEATING OPERATION
FAN OPERATION
"OFF" POSITION