Section 5 – Maintenance
5 Maintenance
The ventilation unit must be maintained regularly to ensure good air quality and energy efficiency.
WARNING!
Always disconnect the unit from the power supply before starting any maintenance work!
5.1 Filter maintenance
All air filters in the system must be maintained regularly to ensure good air quality and efficient operation.
The following maintenance intervals are recommended :
•
Check filters at least every 6 months.
•
Change filters if required.
•
Change filters at least annually.
See Spare Parts for replacement filters.
Fig. 5.1a Filter change Natural Air 180 units
Fig 5.1b Filter change Natural Air 350 units
1
Open access door on front of unit
2
Pull out the filters, clean or change and replace
NOTE!
Note down the filter maintenance carried out (See Annex in User manual)
Maintenance of the fresh-air and exhaust-air filters can be carried out without the use of any tools.
Note down the date of the filter change.
Reset:
After filter maintenance, reset the filter message and interval counter by selecting :
Filters changed “
Yes
” and pressing the OK button.
NOTE!
The unit must not be used without filters! (Without filters the unit performance will quickly degrade
and the heat exchanger will “clog up”).
Use only original spares. Other filters and other grades can affect the proper functioning of the unit.
5.1.2 Maintenance of the external air-filter box
(when fitted)
The ventilation unit is equipped with internal air filters.
An additional external air-filter box can be fitted to the duct work.
•
To help protect the ventilation unit, a coarse pre filter box can be fitted to the Fresh air incoming duct.
•
A pollen filter box, for allergy sufferers, can be fitted to the Supply air duct work.
The panel filters used in the external filter box must be maintained in the same way as the filters in the
ventilation unit.
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