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en
4
Maintenance
4.1
Cleaning the unit
You can clean the exterior of the unit with a damp cloth and a
domestic cleaning agent. Do not use any solvents.
Caution:
c
Make sure that no water runs into the unit.
4.2
Replacing or cleaning the filter
The filter must be cleaned regularly. A dirty filter may cause
inadequate heating as well as a high noise level. The interval at
which the filter is to be cleaned depends on the local condi
-
tions.
You can clean the filter with a vacuum cleaner, for instance.
After several cleanings, however, the filter must be replaced.
New filters are available from Biddle.
4.2.1 Cleaning the filter
1. Switch the unit off using the controller.
2. Remove the air inlet grille
1
.
3. Clean the filter
2
using a vacuum cleaner
3
.
4. Replace the air inlet grille.
5. Switch the unit on.
4.2.2 Removing and replacing the filter
Danger:
d
This may be carried out by qualified staff only.
Warning:
w
Replace the filter if it is damaged.
