Duct Devil Ventductools E-VAC 4500 Buku Petunjuk - Halaman 5
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This is very dependent on the judgement and experience of the person given this task and will be subject to a
certain amount of trial and error.
After a period of time replacing primary or secondary filters will no longer restore the pressure gauge readings
to the 'start values'. For example, reading 350 Pascals initially, after a number of primary and secondary filter
changes may read 650 Pascals, this would be an indication to the user that the HEPA has a significant loading of
dust and may require replacement.
When taking pressure gauge readings, the following needs to be borne in mind, the use of flexible ducting will
affect the performance of the equipment and also increases or decrease pressure gauge readings depending on
whether the ducting are used on the inlet or outlet of the machine.
The ideal method of use is for the appliance to be situated against the outside of the enclosure with the inlet
spigot (or open front section) passing through polythene and the pre filter box (three stage model) mounted
internally so that the pre filter can be changed by the persons working inside. Two stage machines have an
open front section, the pre filter can be changed inside the closure by removing the clamp frame.
Whenever possible the machine should be situated opposite to the airlock to provide a flow of air across the
working area.
For three stage machines the intermediate filter can be changed by removing the front section, this may be
held on with clips or bolts depending on the model and replacing the filter ensuring the direction of airflow
shown on the filter is observed.
For all model's user changing of the HEPA filter is not recommended as the filter is easily subject to damage and
unless a DOP test is carried out, filter and filter seal integrity cannot be guaranteed.
List of Spare parts E-vac 5400 - 110v & 240v
F07 - Intermediate Pre-filter G4 594mm x 594mm x 95mm
F25 HEPA filter - H14
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