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The air stream should therefore be directed
outwards to withstand the load. Approximate-
ly 15° is a suitable angle. Generally speaking,
the higher the load, the greater the angle is
needed.
Basic setting fan speed
Set the fan speed using the fan speed controls
so that the air speed 1 metre above the floor
is 3-4 m/s. Note that the airflow direction and
speed may need further fine adjustment de-
pending on the loading of the door.
Service, repairs and maintenance
For all service, repair and maintenance first
carry out the following:
1. Disconnect the power supply.
2. The service hatch is opened by slackening
off the screws on the underside of the unit
as illustrated on page 2.
Maintenance
Since the fan motors and other components
are maintenance free, no maintenance other
than regular cleaning is necessary. This can
vary depending on local conditions, howe-
ver undertake cleaning at least twice a year.
Grille, impeller and elements can be vacuum
cleaned or wiped using a dry cloth. Avoid
the use of strong alkaline or acidic cleaning
agents.
Overheating
The air curtain unit with electric heater is
equipped with an overheat protector. If it is
deployed due to overheating, reset as follows:
1. Disconnect the electricity with the fully
isolated switch.
2. Allow the electrical coil to cool.
3. Determine the cause of overheating and
rectify the fault.
4. Reconnect the power and start the unit.
All motors are equipped with an integral ther-
mal safety cut-out. This will operate, stopping
the air curtain should the motor temperature
rise too high. The cut-out will automatically
reset when the motor temperature has retur-
ned to within the motor's operating limits.
ADR E
Fan replacement
1. Determine which of the fans is not functio-
ning.
2. Disconnect the cables to the relevant fan.
3. Remove the screws securing the fan and lift
the fan out.
4. Install the new fan in reverse order to the
above.
Replacing the electric coil
1. Mark and disconnect the cables to the elec-
tric coil.
2. Remove the mounting screws securing the
coil in the unit and lift the coil out.
3. Install the new coil in
the above.
Trouble shooting
If the fans are stationary, check the following:
1. Operating power supply to the unit; check
fuses, circuit-breaker, time switch/thermo-
stat (if any) that starts and stops the unit.
2. That the air flow selector is correctly set.
3. That the position limit switch is working (if
installed).
4. That the intake grille is not dirty.
If there is no heat, check the following:
1. Power supply to electric heater coil; check
fuses and circuit-breaker (if any).
2. That the heat demand exists; check ther-
mostat settings and actual temperature.
3. That the output selector (if any) is set cor-
rectly.
4. That the intake grille is not dirty.
If the fault cannot be rectified, please contact
a qualified service technician.
Safety cut-out
(applies to units with electric heater)
If the installation is protected by means of a
safety cut-out, which trips when the appliance
is connected, this may be due to moisture
in the heating element. When an appliance
containing a heater element, has not been
used for a long period and is stored in a damp
environment, moisture can enter the element.
This should not be seen as a fault, but is
GB
reverse order to
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