Using The Controls; Maintenance - Dometic 3300 Manuel D'installation Et D'utilisation

Maintenance

5. When the lid closes, the fan motor automatically
turns OFF. Any time you wish to reverse the fan blade
motor while the system is in operation, select the
center OFF (neutral) position and allow the fan blade
to stop completely. Once stopped, you may safely
select the opposite direction to restart the motor.
6. These two models are equipped with a built-in
thermostat. Preselect a comfort setting from deep
blue to deep red on the thermostat dial (22 °F to
123 °F; –6 °C to 51 °C). The fan motor will turn ON
or OFF, based on the interior ambient temperature
compared to the thermostat setting. When the
thermostat temperature is "satisfied," the fan motor
will turn OFF and the lid will stay open. When the
thermostat calls for cooling, the fan blade motor
automatically activates. The lid must be open at least
4 in. (102 mm) and OUT or IN must be selected and
not the center OFF position (Model 3350). The ON/
OFF switch on the fan must be in the ON position
(Model 3300) before the thermostat can activate the
fan blade.
7. Both models are equipped with a rain sensor. When
the lid is open and moisture contacts the sensor,
the lid closes and disengages the fan blade motor.
When the rain sensor dries, it will not automatically
re-open the lid. Manually opening the lid by using
the lift-motor knob will bypass the rain sensor with
fan operation, reverting to the setting prior to the
sensor's activation. When the rain sensor has been
overridden by manually opening the lid, the rain
sensor will become active again once it has dried.

5 .7 Using the Controls

I For Models 4201, 4251, 4301, 4351
1. Turn the three-speed knob to the desired
performance level (0-OFF, 1-LOW, 2-MEDIUM or
3-HIGH). This will activate the fan.
2. Select UP to raise the vent lid or DOWN to lower the
lid from the remote wall-mounted switch.
22
3. When equipped with a fan blade ON/OFF Switch
(Model 4201/4301), select ON or OFF. When the
fan is equipped with a fan blade motor-reversing
switch (Model 4251/4351), preselect either OUT
or IN on the reversing switch; the center position
is OFF (neutral position). As the vent lid opens and
reaches approximately 4 in. (102 mm), the fan blade
turns on to the preselected speed and direction. See
"Operating the Reverse Switch" on page 15.
I OUT (Exhaust mode) pulls fresh air in through a
slightly open window or door while expelling
hot, stale, stuffy air out to the roof area. IN (Intake
mode) draws air into the coach from the roof area
and effectively pressurizes the coach if all windows,
doors and other vents are closed.
4. When the lid closes, the fan blade motor
automatically turns OFF. Anytime you reverse the fan
blades while the system is in operation, select the
center OFF (neutral) position and allow the fan blades
to stop completely. Once stopped, you may safely
select the opposite direction to restart the motor.
5. Both models 4301 & 4351 are equipped with a rain
sensor. When the lid is open and moisture contacts
the sensor, the lid closes and disengages the fan
blade motor. When the rain sensor dries, it will not
automatically re-open the lid. Manually opening the
lid by using the lift-motor knob will bypass the rain
sensor with fan operation, reverting to the setting prior
to the sensor's activation. When the rain sensor has
been overridden by manually opening the lid, the rain
sensor will become active again once it has dried.
6 Maintenance

WARNING: ELECTRICAL SHOCK, FIRE, AND/OR
EXPLOSION HAZARD .
Always disconnect the unit from power before
cleaning or servicing. If you are unfamiliar with
working with electrical components, contact a
qualified service professional. Failure to obey this
warning could result in death or serious injury.
NOTICE: Perform the maintenance and cleaning in this
section as needed, based on the use of the appliance.
Failure to properly maintain the appliance may void the
warranty and could result in unsafe operation. Preventive
maintenance is not covered under the warranty.
Fan-Tastic Vent Fan
EN