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S3 R
17 Cleaning - Maintenance, S3 R
Before opening the door of the heat recovery system or carrying out maintenance on the
kitchen hood: switch off the heat, let the fans continue for three minutes to remove hot air,
remove the power from the unit and wait 2 minutes before opening the doors.
Fans: Item nos. 6 and 7/Chap. 9 General Drawing. The fans must be cleaned once pr. year. The fans are
cleaned with a small brush and compressed air, if available. NB! Do not use water. Dismantle the
fan as follows: Open the doors as instructed. Pull out the electric quick-release contact for the
motor. Unscrew 2 screws at the front of the motor’s mounting plate. The fan can then be pulled
carefully down and out of the unit.
Filters: To preserve a healthy indoor environment, it is important to change filters when they are dirty.
Dirty filters lead to:
Increased air resistance in the filter – less air in the home – the risk of bacterial growth in
the filter – in the worst case scenario, the system can be damaged.
How often the filters need to be changed depends on the degree of contamination of the air where
they are installed. In general, the filters need to be changed once a year, preferably in the autumn
(after the pollen season). In areas with a lot of dust and contamination, the filters should be
changed in the spring and autumn. The supply air filter and extract air filter (2 and 1) consist of a
compact filter (F7). These are pushed into place.
It is recommended that you order a filter subscription to ensure full benefit from the system and the
cheapest prices.
Order no. for a complete set of filters: 12328
When changing filter, please perform an overall check of the ventilation unit.
Rotor: As the system has filters installed with a high tightness class, it is not normally necessary to clean
the rotor. If, for various reasons, it should still be necessary, dust can be removed with a soft
brush. Further cleaning is possible if you remove the rotor, spray it with fat-soluble detergent and
then blow it clean from the opposite side. Distance approximately 60mm and max. pressure 80
bar. Ensure that the motor is not exposed to water during cleaning. Ensure that all seals around
the rotor are intact and tight.
Do not use detergent that is harmful to aluminium or the environment.
Valves and
duct system: Clean the valves at least once a year. The duct system must be cleaned at least every 10 years.
Outdoor air
intake: Check once a year that the grille is not clogged.
Roof hat: Check once a year that the drainage gap at the bottom is not clogged with leaves. This applies
only if the system has a roof hat.
Filter location
(the drawing shows the left model/the right model is inverted)
Supply air filter:
Compact filter
Rotor
Extract air filter:
Compact filter
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