SAVE VTR 150K USER MANUALV01 20210316

Maintenance
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Fig. 7 Heat exchanger
Even if the required maintenance is carried out, dust will build up in the ex-
changer block. It is therefore of vital importance for the upkeep of a high effi-
ciency that the exchanger block is removed from the unit and cleaned
periodically as described below. Clean the heat exchanger at least every 3
years or when required.
1. Stop the unit by disconnecting the mains.
2. Open the front hatch. See chapter 5.3.
3. Disconnect the rotor power supply and the rotor sensor. The cables are
found beside the rotor at the back.
4. Pull out the rotor towards you. Some force may be needed.
5. Gently vacuum the heat exchanger.
Warning
Ensure the rotor motor is not exposed to moisture
6. Remount the rotor. Don’t forget to reconnect the rotor power and sensor
cables.
7. Close and lock the front hatch and connect the unit to mains.
5.6 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. 8 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.
The fans may be cleaned as illustrated in below procedure.
1. Disconnect the fan power cables. The cables are found beside the fans.
2. Pull out the fans towards you. Some force may be needed.
3. 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.
4. Remount the fans. Don’t forget to reconnect the fan power cables.
5.7 To replace the rotor drive belt
If the alarm Rotor guard is raised, see chapter 4.2.3, the rotor drive belt may be damaged or broken.
A spare drive belt is already placed on the heat exchanger rotor and delivered with the unit.
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