EN | Operating manual Maintenance and repair of the dryer
44 WVM 45 -1450
Take the new dewpoint sensor (2) from the box, remove the protective caps (4, 5) and
screw it into the sensor chamber (3).
Place seal onto sealing face; connect adapter (1) and secure it by tightening the screw.
In case of misreading, check that the ow through the sensor is between 1 and 5 Nl/min.
If no other maintenance work is to be carried out: Restart the dryer (see page 38).
Place the protective caps (4, 5) onto the old dewpoint sensor and dispose of it in a proper
manner.
Maintenance interval (24 months)
Inspect vacuum pump bearing and replace, if necessary
Caution!
Maintenance work at the vacuum pump may only be carried out by authorised
and suitably qualifi ed technical personnel who have already successfully com-
pleted similar tasks.
Please contact us to arrange a visit by one of our service technicians. Alterna-
tively, ask us for a training session for the servicing of the vacuum pump. You
will fi nd the telephone number of our customer services department on page 6.
Maintenance interval (48 months)
To complete the following maintenance tasks, you must dismantle the pipe bridges and the
vessels. We therefore recommend that you carry out these tasks together.
Note:
In accordance with national regulations, a pressure vessel inspection may be
prescribed to be carried out at regular intervals by an independent supervisory
offi ce.
For an inspection of the pressure vessels, the drying agent must be removed as
described as follows.
When inspecting the pressure vessels, it is recommended to check the condi-
tion of all fi ttings such as e.g. dessicant sieve and gaskets. If necessary, these
fi ttings must be cleaned or renewed.
In the event of comprehensive maintenance or repair tasks, contact the manu-
facturer (see page 6).
Replace desiccant sieve
Between vessel and the upper pipes anged there are tted desiccant sieves which retain the
drying agent dust. If these desiccant sieves become blocked, a dam pressure is generated
which can cause compressed air uctuations in the compressed air system.
For disassembling the desiccant sieves, the entire arch pipe must be removed rst.
Risk of falls!
The dryer must not be misused as a climbing aid! The components have not
been designed for such loads and could fracture.
Only use approved climbing aids when disassembling the upper arch pipe.
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