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HDK-MT350_EN_06
Setting regeneration gas volume
The manufacturer sets the regeneration gas volume at the factory with the aid of
a volumetric flow measuring device.
The regeneration gas volume must be reset after replacing the needle valve or
installation of a new check valve block.
Danger!
There is a very considerable risk of personal injury, when carrying out
work on the activated and pressurised dryer.
The following tasks must be carried out with the system pressurised.
Proceed with caution.
Warning against sudden air ejection!
During expansion the pressure is released suddenly through the muffler:
A loud cracking noise occurs which can injure your hearing.
Particles carried in the air flow act like bullets and can injure your
eyes or skin.
Always wear eye and ear protection, therefore, when you are in the
vicinity of the dryer!
► Wait until a tower has expanded and has been in the dehumidification phase
for 8 minutes.
The regeneration gas volume can be set on the needle valve with a screwdriver.
The number of turns to set the regeneration gas volume at the respective
pressure level is specified in the following table (
table: Regeneration gas volume
setting
).
Note on measuring accuracy
Setting the regeneration gas volume by the number of turns of the
setting screw on the needle valve is not an exact procedure.
Therefore, after resetting the regeneration gas volume, observe for
several days whether the dewpoint reading deteriorates.
If necessary, open the needle valve by a further half turn. The dewpoint
should then return to the set range.
► Remove the protective cap.
► Release the lock nut on the needle
valve.
► Before setting the volume, turn the
screw in anticlockwise direction to
the left stop to set the minimum
regeneration air volume.
Needle valve
