The motor bearings are life time lubricated and maintenance free.
Even if the required maintenance, such as changing of filters is carried out, dust and grease may slowly build up inside
the fans. This will reduce the efficiency.
The fans may be cleaned as described below.
1. Stop the unit by disconnecting the mains.
2. Open the front hatch. See chapter 6.2.
3. Disconnect the fan power cables. The cables are found beside the fans.
4. Pull the fans towards you. Some force may be needed.
5. Clean the fans with a cloth or a soft brush. Do not use water. White spirit can be used to remove obstinate deposits.
Allow the fans to dry properly before remounting.
6. Remount the fans. Don’t forget to reconnect the fan power cables.
7. Close the front hatch and connect the unit to mains.
6.7 Replacing rotor drive belt
Note:
Depending on model, left or right, it may be necessary to remove the heat exchanger in order to replace a
broken drive belt since the belt pulley cannot be accessed.
If the rotor motor is placed at the back of the unit, it is recommended to remove the heat exchanger to
change the drive belt, see chapter 6.7.2.
If the alarm Rotor guard is raised, see chapter 9.1, the rotor drive belt may be damaged or broken.
The replacement drive belt (1) is adjustable and delivered with a nipple attached in one end.
Danger
• Make sure that the Mains supply to the unit is disconnected before performing any maintenance or
electrical work!
211476 | A001
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