Maintenance
|
23
5.3.2 Checking the rotating heat exchanger
After a long time of use dust may build up in the exchanger and block the airflow. It is important to clean the exchanger
regularly to maintain high efficiency. The complete rotating heat exchanger block can be taken out of the unit (figure 7)
in the smaller models to facilitate cleaning and maintenance. Wash in hot soapy water or use pressure air. Do not use
detergent containing ammonia.
Check at least once a year that the exchanger rotor rotates easily. Check this by removing the driving belt and move
the rotor by hand. Check also that the brushes are undamaged. The rotor bearings are permanently lubricated from fac-
tory and should not be re-greased.
Check 4 times per year that the driving belt is sufficiently tense, that it follows the tracks and that it is undamaged. If
the belt tension is too low it needs to be shortened.
Fig. 7 Dismounting the heat exchanger
Note:
Make sure that the rotor motor is not exposed to moisture.
5.3.3 Checking the fans
Even if the required maintenance, such as change of filters, is carried out dust and grease may slowly build up inside
the fans. This will reduce the efficiency.
The fans can be dismounted by loosening the black knobs which attach the rack to the units inner wall section. The
complete fan rack can then be pulled out after all the attached fast couplings to the electric wires have been discon-
nected (figure 8). The fans may be cleaned with a cloth or a soft brush. Do not use water. White spirit can be used to re-
move accumulations which are otherwise difficult to remove. Allow drying properly before remounting.
The fan motor bearings are life time lubricated and should not be re-greased.
Fig. 8 Dismounting the fans
5.3.4 Checking the hot water heating battery
After long periods of operation (usually several years) dust may have deposited on the surface of the battery. This may
reduce batteries capacity. The battery can be cleaned with a pressure washer with misting jets, or with compressed air.
Cleaning should be carried out carefully so as not to damage the batteries aluminium fins. Once a year the battery
water circuit needs to be vented to maintain the batteries capacity.
5.3.5 Checking the electrical heating battery
After long period of time dust and pollutants can build up on the heating rods. This can cause unpleasant odors and in
the worst case fire. Clean with compressed air, vacuum or brush. The automatic safety function needs to be tested and
verified.
124455 | A003
To Next Page
Loading...
Need help?
General
