Manual
according to regulation DIN 82079
Version 10.19
Date: 14.10.2019
Name: Manual_VARIO-MA
GIEBEL FilTec GmbH • Web
• Tel +49 (0) 7946 944401-0
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Section 10:
maintenance schedule
1. Optical check of the silica gel for saturation
Check
The loading condition of the silica gel is to be determined by visual inspection of the
adsorber. The colour orange indicates that the silica gel can still adsorb water and air is
dehumidified. If the silica gel is completely saturated, the colour changes to green.
If there are oil particles on the silica gel, these close the pores and the adsorption capacity
is reduced. This causes the silica gel to discolour more slowly and unevenly.
Cycle
Weekly
Action
The silica gel is removed from the adsorber. New silica gel is refilled. With disposable
adsorbers, the entire adsorber part is changed.
2. Check filter unit for impurities
Check
Remove
the lid from the adsorber part and remove the activated charcoal disc. Then
empty the desiccant. The filter unit can then be removed. This must be checked for
impurities and should be free of dirt for smooth operation.
Cycle
Half-yearly
Action
The filter unit is part of the spare parts package and should be replaced if there is
contamination.
3. Check prefilter disc for impurities
Check
The prefilter disc should be checked for impurities that may clog it and prevent free air
entry.
Cycle
Half-yearly
Action
Clean the prefilter disc with compressed air to remove dirt particles and dust.
4. Check seals for wear
Check
The
seals and O-rings installed in the adsorber and in the valve part must be checked for
their perfect condition. For this purpose, the flat seal in the cover, the O-rings of the filter
unit, and the O-rings between the receiving and adsorber parts should be examined for
brittleness.
Cycle
Yearly
Action
In case of existing damage, the seals or O-rings should be replaced. These are part of the
spare parts package.