18
Air Handling Units
Operating Checks
Different types of filter mounting are used depending
on the filter type and filtration class. When replacing fil
-
ter inserts, always check the condition of the sealing;
if damaged, replace the sealing with a new one. When
checking or replacing the filters, observe the following pro
-
cedures:
Figure 30
– Mounting of insert and frame filters
1)
The frame and insert (G3) filter inserts are inserted into
the guiding rails. The individual inserts are interconnected
using the clips so all inserts can be removed together. Be-
fore the filtration walls can be removed, the front pressure
element must be removed.
Figure 31
– Sliding filtration wall handling
2)
Bag, compact and metal filter inserts are fitted in se
-
parate fields of the filtering wall. The filters are replaced
from the "dirty" (pressure) side. To change the filter insert,
unscrew the locking closures and replace the inset with a
new one. Before inserting the new filter inserts, check the
sealing. Check the filter insert centring in the frame field
before tightening the locking closures.
3)
In some cases, the filter inserts are fitted into the filtra
-
tion walls created from mounting frames. The filters are
fixed to these frames using the clips situated in the moun
-
ting frame corners.
Depending on the space arrangement, the wall can be de-
signed as a sliding or fixed (non-sliding) wall with access
to inside the unit.
Front pressure
element
In some cases, the filtration wall can be designed as a sli
-
ding wall (the wall can be slid out towards the unit’s service
side). Special safety precautions must be applied when
handling the filtration wall. We recommend the filtration
wall to be pushed out from the unit in steps so that the
accessible filter inserts can be gradually removed. New fil
-
ter inserts are installed in the reversed order of steps. Due
to its size and weight, never handle the filtration wall com
-
pletely fitted with filter inserts outside the air handling unit.
Replacement filter inserts can only be ordered as a com
-
plete kit. When placing an order, use the code from Table 7
and follow the instructions in the chapter Spare Parts.
Modules
A
E
Filter inserts
– number
Width
Height
Inner
Width mm
Inner
Height mm
592 x 592
287 x 592
6
4
1893
1227
6
-
7
4
2199
6
2
8
4
2505
8
-
9
4
2811
8
2
4
6
1281
1839
6
-
5
6
1587
6
3
6
6
1893
9
-
7
6
2199
9
3
8
6
2505
12
-
9
6
2811
12
3
6
8
1893
2450
12
-
7
8
2199
12
4
8
8
2505
16
-
9
8
2811
16
4
Table 8
– Dimensions and numbers of filter inserts*
Figure 32
– fixing filtration wall with clips (filter strip)
Figure 29 –
Filtering wall arrangement examples
Filter inserts sized 592x592 mm (supporting frame
610x610 mm) are used; with odd air-handling unit module
widths, the half filter insert (supporting frame 305x610 mm)
is added.
*(The air-handling unit cross-section range is marked by
modules – module 306 mm.)
air-handling unit cross-se-
ction range 7x6
air-handling unit cross-secti-
on range 8x4
