Frico Thermozone AG 4000 W Bedienungsanleitung Seite 19

Adjustment of the air curtain and air flow
The direction and speed of the air flow should
be adjusted considering the load on the
opening. Pressure forces affect the air stream
and make it bend inwards into the premises
(when the premises are heated and the
outdoor air is cold).
The air stream should therefore be
directed outwards to withstand the load.
Approximately 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
depending on the loading of the door.
Filter
The distance between the coil plates in
combination with the hole diameter of the
intake grille protects against dirt and blockage
and makes a separate filter unnecessary.
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 first opening
the intake grille and then slackening off
the screws in the underside of the unit, as
illustrated on page 3.
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, however
undertake cleaning at least twice a year.
Grille, impeller and elements can be vacuum
cleaned or wiped using a damp cloth. Avoid
the use of strong alkaline or acidic cleaning
agents.
Overheating
All motors are equipped with an integral
AG 4000 W
thermal 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 returned to within the
motor's operating limits.
Fan replacement
1. Determine which of the fans is not
functioning.
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 water coil
1. Shut off the water supply to the unit.
2. Disconnect the connections for the water
coil.
3. Remove the mounting screws securing the
coil in the unit and lift the coil out.
4. Install the new coil in reverse order to the
above.
Draining the water coil
The drain valve is on the underside of the coil
on the connector side. It can be accessed via
the service hatch.
Trouble shooting
If the fans are stationary, check the following:
1. Operating power supply to the unit; check
fuses, circuit-breaker, time switch (if any)
that starts and stops the unit.
2. That the airflow selector is correctly set.
3. That the door contact is working (if
installed).
4. That the overheat protection for the motors
has not been deployed.
5. That the intake grille is not dirty.
If there is no heat, check the following:
1. That there is hot water to the water
coil. (Check the circulation pump - if
applicable.)
2. That the heat demand exists; check
thermostat settings and actual temperature.
GB
19