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6. FILTERED TAPS
Differential pressure inside the filter is detected by an internal pressure sensor located within the MPS,
and which is connected to the filter by means of two filtered taps.
Filter taps are designed to prevent the dust clogging the silicon tubes, which connect the filter to the
MPS sensor.
6.1 INSTALLATION
When the fan is located downstream from the filter, we need to install one filtered tap in the clean air
plenum and the other on the dust laden air plenum. In case of pressurised filters it is sufficient to install
only one filtered tap on the dust laden air plenum.
Please refer to drawing 1 page 5 for the installation of filtered taps.
1)
Drill the 4 fixing holes of the filtered taps over the filter wall (∅ 3,75 mm., inter-axis 39 mm.).
2)
In the centre of the 4 fixing holes, drill 3 to 5 pressure interception holes (∅ 4 mm) inside a circular
area of 20mm.
(In alternative drill just one hole ∅ 20 mm.).
3) Fix the rubber seal with abundant silicon.
4) Position the filtered taps with their tube connections upward.
5)
Fix the filtered taps with self-threading screws (∅ 4,25 mm.).
6.2 CONNECTION
1) Make sure that MPS does not have power (on/off switch [19] on 0 and terminals [15] disconnected).
2) Connect the tubes of the filtered taps to the pressure ports of MPS. The tube from the clean air
plenum needs to be connected to the inlet indicated with “-“ port while the tube from the dirty air
plenum is connected to the inlet indicated with the “+” port.
N.B.:
– Fix the filter taps in a position that will prevent condensation and or deposits accumulating.
–
The two connecting tubes (∅ 6/4) between the filtered taps and the inlet, should be positioned
in an upward oriented position. This will eliminate the possibility of water particles, caused
by condensation, in entering the piping.
In case of humid filtration process it is advisable to install a condensate drainage valve for
each tube before the MPS pressure ports.
– When the filtered taps are correctly installed and connected to the pressure ports the display
[10] will show positive
∆P values. Should the display show P---, it means that connections
between the filter taps and the pressure ports have been inverted.
If the problem persists:
• Disconnect the pressure tubes.
• Adjust the zero pressure trimmer [25] in order to bring the display back to 0 kPa.
• Reconnect the pressure tubes to the filtered taps and the pressure ports.
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