SAVE VTR 250B USER MANUALV01

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Maintenance
4.5 To clean fans
Danger
• Make sure that the mains supply to the unit is disconnected before performing any maintenance or
electrical work!
Warning
• Risk of injury due to rotating parts that have not come to a complete standstill after mains supply to the
unit have been disconnected.
Warning
• Beware of sharp edges during mounting and maintenance. Use protective gloves.
Fig. 3 Extract and supply air fans
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.
1. Disconnect the fan power cables. The cables are found beside the fans.
2. Remove knobs that hold fans in place.
3. Pull out the fans towards you. Some force may be needed.
4. 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.
5. Remount the fans. Don’t forget to reconnect the fan power cables.
4.6 To replace the rotor drive belt
Fig. 4 Rotor drive belt
Danger
• Make sure that the mains supply to the unit is disconnected
before performing any maintenance or electrical work!
Warning
• Risk of personal injury! The heat exchanger weighs about 14
kg. There is a risk that the heat exchanger falls out of the unit.
• Make sure that small children are not beneath the unit when
the heat exchanger is removed!
If the alarm Rotor guard is raised the rotor drive belt may be damaged or
broken, see chapter 3.2.3.
A spare drive belt is already placed on the heat exchanger rotor and delivered
with the unit.
4.6.1 Temporary belt repair solution
In case both welded belts break it is possible to use joint nipple as a temporarily quick repair solution until the welded
belt can be replaced with a new one. Depending of how the unit is installed, it may be not necessary to remove the
heat exchanger package in order to temporary repair a broken drive belt if the belt pulley can be accessed.
Note:
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 4.6.1.2.
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