Maintenance and repair of the dryer
A190-930TX_EN_03_ 2009-02-06 43
Regular maintenance intervals
Note:
If a vessel has been depressurised, e.g. after completion of the
expansion phase, and the pressure remains above 0 bar, the vessel is
pressurised by what is known as ram pressure. This might be due to
blockage at the muffler(s),
contamination of the dust sieves,
spent drying agent.
To prevent such malfunctions, regularly service the dryer as
described below.
The table provides an overview of the maintenance work to be carried out. The
individual tasks are described in the following pages.
Maintenance interval
Component Maintenance task to be carried
daily
weekly
monthly
12 months
24 months
48 months
see page
Complete dryer Carry out visual and function checks.
▲
44
Vessel pressure gauge Check dam pressure. For a dam pressure
exceeding 0.3 bar:
– Check muffler.
– Check dust sieve.
– Check drying agent.
▲
45
Upstream and
downstream filters
(option)
Check differential pressure on the upstream
and downstream filters.
▲
45
Upstream filter (option) Check function of the condensate trap, clean if
necessary.
▲
45
Control air filter Renew filter element.
46
Muffler Renew muffler.
46
Dew point sensor (with
optional dew point
sensing-control)
Must be calibrated.
47
Expansion valves Renew gaskets.
48
Solenoid valves Renew valve bodies and solenoids.
49
Dust sieves, gaskets,
drying agent
Renew.
50
Codes: ▲ Check. Renew.
When carrying out any maintenance work, comply with the following safety
instructions:
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