Frico Thermozone AR3500 serie Montageanleitung Seite 30

GB
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.
Reset is performed as follows:
1. Locate the red button inside the air curtain
unit. It is visible and accessible by opening
of the service hatch and inlet grille. The
button is on the left side seen from inside
the room looking out. On the 2 metre
variant, two red buttons are installed in the
middle of the unit.
2. Press the red button until a click is heard.
3. Connect the air curtain again.
All motors are equipped with an integral
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.
Temperature control
Temperature control of SIRe maintains
the exhaust temperature at +40 °C. If the
temperature should exceed anyway there is
an over heating alarm. For more information
see the manual for SIRe.
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 as above in reverse
order.
Replacing the electric heater/coil
(AR3500E)
1. Mark and disconnect the cables to the
electric heater/coil.
2. Remove the mounting screws securing the
AR3500
electric heater/coil in the unit and lift the
electric heater/coil out.
3. Install the new electric heater/coil in
reverse order to the above.
Replacing the water coil (AR3500W)
1. Shut off the water supply to the unit.
2. Disconnect the connections to 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 (AR3500W)
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 not working or do not blow
properly, check the following:
•. Operating power supply to the unit;
check fuses, circuit-breaker, time switch/
thermostat (if any) that starts and stops the
unit.
•. That the air flow selector is correctly set.
•. That the position limit switch is working.
•. That the overheat protection for the motors
has not been deployed.
•. That the intake grille is not dirty.
If there is no heat, check the following:
•. That the heat demand exists; check
thermostat settings and actual temperature.
For units with electrical heating, check the
following:
•. Power supply to electric heater coil; check
fuses and circuit-breaker (if any).
•. That the overheat protection for the motors
has not been deployed.
For units with water coil, check the following:
•. That the water coil is air free.
•. That there is enough water flow.
•. That incoming water is heated enough.
If the fault cannot be rectified, please contact
a qualified service technician.