HTC 80 iD, Руководство пользователя, Страница: 44 / 61

Maintenance HTC 80 iD
36 1.1
5.4.5 Check for leaks
To obtain the maximum performance from your dust extractor, you should at regular
intervals, or on the suspicion of leaks, check the entire vacuum system's air tightness.
The greatest risk for leaks are by the Longopac, the Longopac holder's sealing strips,
sliding valve, HEPA filters and negative pressure limit valve.
These checks are made when the vacuum system is running. It is also possible to
increase the negative pressure in the vacuum system by closing the sliding valve and
thus increase the sensitivity of these methods, so even small leaks can be detected.
Some leaks are audible. Usually, there is a whistling or roaring sound. Try placing a
plastic bag or similar over the suspect area and see if the sound changes.
Tip!
Suspected leaks can be checked for by carefully pulling a cloth, piece of paper
or another light and pliable material over the area where it is suspected the leak
is. If the material fastens due to suction, there is a leak in the area. It is also
possible to increase the negative pressure by closing the sliding valve and thus
increasing the sensitivity of this method.
If you have access to a smoke machine, you can see if the smoke is sucked in in places
where the vacuum system should be airtight.
5.4.6 Check filter cleaning valve
Check the valve can move without jamming. Visually inspect that the sealing strip and
sealing surface look good. This check can best be done in the service position (Lower
the dust extractor to the service position, page
15 ).
5.4.7 Check sliding valve bypass
Check the sliding valve can move without jamming. In addition, visually check that
there is no damage on the sliding valve's seal surfaces. Adjust the quick fasteners on the
pre-separator if necessary.
5.4.8 Check sliding valve inlet dust extractor
Check the sliding valve can move without jamming. In addition, visually check that
there is no damage on the sliding valve's seal surfaces.