O P E R AT I N G A N D I N STA L L AT I O N I N ST R U CT I O N S SYST E M V E N T E C H LG 5 0 0 P
PAG E 4 3
Before removing air filters from the
device, the filter tenter frames should be
loosened by pulling forwards. Only then
can the air filters be gently lifted out and
replaced.
When inserting the new filters care has
to be taken that there is dependable
sealing and sufficient clamping between
the air filter and filter tensioning frame
to avoid high filter bypass leakages.
When replacing the air filters
care has to be taken that
no contamination of the unit
or of the system parts takes place.
Contaminated filters are to be disposed
of properly. It is advisable to pack the air
filter in an air-tight container immedi-
ately after removal from the device to
avoid contamination of the ventilation
system and device.
The work tasks on the venti-
lation unit as specified below
must be performed by skilled
personnel only. If defects are discovered
during the course of maintenance work,
these must be immediately rectified to
ensure a safe system operation. Only
genuine spare parts may be used for
replacements or repairs.
11.4 SERVICE INSTRUCTIONS
FOR THE SPECIALIZED
INSTALLING COMPANY
Cleaning at least once annually is re-
commended, depending on the degree of
contamination of the heat exchanger.
The heat exchanger must be carefully
removed from the device for mainte-
nance.
he heat exchanger is cleaned by rinsing
with warm water (max. 50 °C) and a
normal cleaning agent and then rinsing
off with warm water. Under no circum-
stances should the exchanger be blown
through with compressed air. This could
destroy the exchanger!
Before fitting the exchanger in the
device, the guide rails of the exchanger
should be lightly greased to ensure sim-
ple and smooth sliding. The exchanger
should be replaced in the same position
(extract air side should be returned to
the extract air side).
11.4.1 Heat exchanger with bypass flap
Filter tensioning
frames
Air filters
