4
ACR35
Maintenance
Since fan motors and other components are maintenance
free, no maintenance other than cleaning is necessary.
The level of cleaning can vary depending on local condi-
tions. Undertake cleaning at least twice a year. Inlet and
exhaust grilles, impeller and elements can be vacuum
cleaned or wiped using a damp cloth. Use a brush when
vacuuming to prevent damaging sensitive parts. 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 overhea-
ting, 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 PLS maintains the exhaust
temperature at +40 °C. If the temperature should exceed
anyway there is an overheating alarm. For more infor-
mation see the manual for PLS.
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 (ACR35-E)
1. Mark and disconnect the cables to the electric
heater/coil.
2. Remove the mounting screws securing the 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 (ACR35-W)
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 (ACR35-W)
The drain valve is on the underside of the coil on the
connector side. It can be accessed via the service hatch.
