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Overheating
The air curtain unit with electrical heating is
equipped with an overheat protection. If it is
deployed due to overheating, reset as follows:
1. Disconnect the electricity supply 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 air curtain.
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 the controller maintains
the exhaust temperature. If the temperature should
exceed the preset value anyway the overheating
alarm goes off. For more information see the
manual for the controller.
Fan replacement
1. Determine which of the fans is not functioning.
2. Disconnect the cables from 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 heating elements (VE)
1. Mark and disconnect the cables to the electric
coil package.
2. Remove the mounting screws securing the
electric coil package in the unit and lift it out.
3. Replace faulty electric coil.
4. Install the electric coil package in reverse order
to the above.
Replacing the water coil (VW)
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.
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Troubleshooting
If the fans are not working or do not blow properly,
check the following:
•
That the intake grille/filter is not dirty.
•
Functions and settings of the control system,
see manual for the controller.
If there is no heat, check the following:
•
Functions and settings of the controller control
system, see manual for the controller.
For units with electrical heating, also check the
following:
•
Power supply to electric heater coil; check
fuses and circuit-breaker (if any).
•
That the overheat protection has not been
deployed.
For units with a water coil, also check the
following:
•
That the water coil is air free.
•
That there is sufficient water flow and pressure.
•
That incoming water is heated adequately.
If the fault cannot be rectified, please contact a
qualified service technician.
Residual current circuit breaker (VE
When the installation is protected by means of a
residual current circuit breaker, 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 or stored in a damp
environment, moisture can enter the element.
This should not be seen as a fault, but is simply
rectified by connecting the appliance to the
main supply via a socket without a safety cut-out
so that the moisture can be eliminated from the
element. The drying time can vary from a few
hours to a few days. As a preventive measure, the
unit should occasionally be run for a short time
when it is not being used for extended periods of
time.
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