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HDK-MT350_EN_06
Desiccant layers
The tower filling consists of three different
layers of desiccant.
The bottom layer consists of ceramic
beads (Duranit).
This is followed by a protective layer of
water-proof silica gel.
The top layer of the tower is filled with a
molecular sieve.
Desiccant layers
Add new desiccant
The previous sections maintenance, the maintenance jobs described in this
section must be additionally carried out every 24 months.must be carried out in
order to fill the dryer with fresh desiccant.
► Fill the tower with fresh preassembled
desiccant packages corresponding to the
layer configuration (see
above
).
Caution - do not exceed the fill level!
Do not fill up to the upper edge. Leave
sufficient space for the built-in parts:
– HDK-MT 15 to 25: approx. 160 mm
– HDK-MT 30 to 70: approx. 180 mm.
► Clean dust screen with compressed air
and replace on the desiccant bed.
Important!
There must be no desiccant on the dust
sieve!
► Fit new dust filter with lightly greased
O-ring into the piston.
► Fit compression spring.
► Replace and lightly grease O-rings on
piston.
► Reinsert piston.
Pay attention to the hole pattern.
Tip
: Use the frame as an alignment
reference!
► Reinstall retaining segments:
—
The notch must face upwards.
—
Fit a small segment last.
Note
:
The gap between the segments must not
exceed max. 1 mm.
Observe fill level - clearance
Checking hole pattern