HDK-MT350_EN_06
47
Maintenance work to be completed every 24 months
In addition to the annual maintenance, the maintenance jobs described in this
section must be additionally carried out every 24 months.
Danger!
There is a very considerable risk of personal injury, when carrying out
work on the activated and pressurised dryer.
Maintenance tasks should only be carried out with the system switched
off and depressurised.
Note:
We recommend removing the entire solenoid valve block where the
dryer is difficult to access and for quicker maintenance.
In this way the maintenance work can be conveniently performed on a
workbench.
Depending on the installation situation and dryer model, however, it
may be necessary to remove and tilt the entire dryer for this purpose.
Replace desiccant
To replace the desiccant, it is first necessary to remove several components of
the tower.
Follow the sequence described below to ensure the desiccant is changed
successfully:
► Depressurise the dryer and shut it down (see page 35).
Removing check valve block
Warning - check valve block can fall off!
After releasing the screws, the check valve block is no longer fixed but rather
rests loosely in position. It weighs approx. 12 kg.
Only use suitable lifting gear to lift the check valve block.
Keep valve blocks as horizontal as possible when lifting off.
Removing check valve block
