Maintenance and repair of the dryer
HDK-CNG_EN_03_2016
45
Replace the safety valve
The operator is responsible for the operation and/or maintenance of the safety
valve. The nature and scope of maintenance work is determined by local policy
and by the type of safety valve installed.
Weekly maintenance tasks
Check differential pressure on the filters
► Check the differential pressure at the pressure gauge for the filter.
The differential pressure should be 0.35 bar max. If the differential pressure
exceeds 0.35 bar, we recommend that you replace the filter element (see
page 46). The filter elements must be replaced in any case every year.
Checking pressure setting at pressure reducer
Damage to heating!
If regeneration gas pressure is too high, the following components may get
damaged and this would impair the function of the dryer. Never set
pressure on the pressure regulator to more than 25 bar!
Note:
The set pressure can only be changed during running regeneration!
► Check the pressure setting at pressure
gauge of the pressure reducer.
For details of the required pressure setting,
please refer to
on page 56.
► If the pressure setting is less than or more
than the correct level, set the correct
pressure at knurled screw of the pressure
reducer.
Pressure reducer
Maintenance work to be completed every 12 months
With ATEX-compliant dryers, tighten down the grounding straps
The grounding straps on ATEX-compliant dryers can work loose over time.
They may then no longer be electrically conductive.
