Parker HDK-CNG Series, Руководство по эксплуатации

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Monitoring of the Operation
HDK-CNG_EN_03_2016 37
Monitoring of the Operation
The dryer operates fully automatically. However, you should carry out the regular
checks described in the Chapter
Maintenance and repair of the dryer .
Warning of sudden gas escape!
During expansion the pressure is relieved suddenly through a restrictor:

A loud cracking noise occurs which can injure your hearing.
Therefore you should always wear ear protection when in the vicinity of
the dryer!
At all times, observe the following points when operating the dryer:

Only operate the dryer within the permissible limits (see type plate). By
operating the dryer in conditions that go beyond the defined values, the dryer is
subjected to loads for which it has not been designed. This may cause
functional defects.

The more powerful the dryer is, the more noise may be generated during
operation. The noise emission level can briefly exceed 95 dB(A). Therefore, the
owner must provide suitable protective equipment (e.g. ear protection).

Check the dryer regularly for externally visible damage and defects. Any
changes, even in its operating behaviour, must be reported immediately to the
competent office or person.

In the event of an emergency or if a safety-relevant disruption occurs (e.g.
escaping natural gas, defective components), the dryer must be shut down
immediately as described in the section
Depressurise the dryer and shut it
down on page 39. The dryer may only be restarted after all defects have been
eliminated.
With dewpoint-sensing control (optional)
Display of dewpoint
If the dryer is equipped with a dewpoint-sensing control system, the digital display
on the control shows the currently measured dewpoint.
If the set dewpoint is exceeded, the system automatically completes a switchover
between the vessels. The dewpoint at which a switchover is made is preset at the
factory.
► After commissioning or extensive maintenance work, check the dewpoint
display at the dryer.
Under certain circumstances, the desired dewpoint is only reached after
prolonged operation.