en-58
en
6
. . Maintenance
6.1
Introduction
This chapter comprises those maintenance activities that the
user himself can perform. Maintenance activities and repairs
that must be performed by an installer are described in chap-
ter
7 Service
.
See also:
6.2
Replacing or cleaning the filter
The unit is fitted with two filters:
• Fresh air filter: F7
1
.
• Extract air filter: M5
2
.
The filters must be cleaned regularly. A dirty filter can cause
inefficient operation and a high noise level.
Remove the filter:
Warning:
w
Set the isolation switch to 0.
1. Open the inspection hatch for the relevant filter.
2. Pull the clamps downward
3
.
3. Remove the filter
4
.
4. Clean the filter using (for example) a vacuum cleaner. After
several cleanings, however, the filter must be replaced.
New filters are available from Biddle.
5. Return the filter to its place.
Note:
n
Position the correct filter back into the correct
place.
Note:
n
Position the filter in the correct direction.
The air direction is shown on the filter and on the
rim of the unit
.
