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Maintenance and repair of the dryer
38
K-MT 1-8/D3
seal.
Remove dewpoint sensor from the sensor cell (3) by turning the nut (2).
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.
If no other maintenance work is to be carried out: Restart the dryer (see page 32 ).
Place the protective caps (4, 5) onto the old dew point sensor and dispose of it in accor-
dance with the applicable regulations.
Maintenance work to be completed every 24 months
Replace the membranes of solenoid valves
You should replace the membranes of solenoid valves every two years. Proceed as described
in section Replace solenoid valves . You must, however, replace the membranes only (con-
tained in the Service Kit for 24 months).
Maintenance work to be completed every 48 months
Replace check valves
Check valves are wear parts and must thus be replaced every 48 months, even if no damage
is visible.
Release pressure from dryer and shut down the unit (see page 31 ).
Remove the securing screws at the rear of the check valve plate.
Insert new balls and new springs and ensure that they are not jammed.
Replace the seals at the securing screws and tighten the screws.
With regeneration gas return (optional):
Also replace the two additional check valves, following the above instructions.
If no other maintenance work is to be carried out: Restart the dryer (see page 32 ).
