Maintenance work to be completed every 12 months
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HDK-CNG_EN_03_2016
The grounding strap is located behind the switch cabinet
and connects all grounding points on the dryer.
► Tighten down these grounding straps regularly and
at least once a year.
► The location of the grounding points is shown in the
grounding diagram on page 31.
Grounding strap
Renew filter elements on the filters
The filter elements must be replaced every 12 months.
► Depressurise the dryer and shut it down (see page 39).
► Remove the bottom section of the filter housing (see figure).
► Replace filter element.
► Refit bottom section of the filter housing: first screw on very tightly, and then
unscrew by a quarter turn.
► Dispose of used filter element in accordance with the applicable regulations.
► If no other maintenance work is to be carried out: Restart the dryer (see
page 40). Check the all filters for leaks.
Replace dewpoint sensor
To ensure precision dew point measurement, it is recommended to replace the
dew point sensor every year. This period depends however on the actual
application and might thus be extended accordingly.
Attention!
The dew point sensor is a sensitive measuring device. It can be damaged
if subjected to forceful vibrations or shocks. Therefore, please handle the
dew point sensor with great care at all times.
In order to limit the impact on the dryer operation to a minimum, we recommend
that you contact the manufacturer well in advance and order a new dewpoint
sensor. After receipt of the new pressure dewpoint sensor, replace the sensor as
follows:
► Flush the pressure equipment with an inert gas; release all pressure and
switch it off.
► Remove the sensor from the dewpoint measuring chamber.
► Before fitting ZHM 100 TT Eex to a sampling block ensure that the large
housing clamp nut is only finger tight against its seal.
► Apply the bonded seal supplied over the sensor end.
► Screw the ZHM 100 TT-Eex into the block by turning the fitting.
Do not turn
the housing!
Fully tighten the fitting using a spanner of the correct size.
Note:
Installation of ZHM 100 TT-Eex must be as per either system drawings in
order to comply with the Intrinsic Safety certification for ZHM 100 TT-Eex.
