Ifferential Pressure (Dp) Connections; Ompressed Ir Onnection - Farr Gold Series Installation, Operation And Maintenance Manual

330.4 Differential Pressure (DP) Connections
Your collector is equipped with an Automatic Pressure Sensing Timer Control or a Magnehelic gauge
accessory. Locate the 1/8" NPT brass elbow fittings included in the control package. Install these elbows
into the factory supplied, 1/8" NPT clean-air and dirty-air pressure taps on the collector. Refer to Figure
330.1 and your General Dimensions drawing for the location of these taps.
Using the black ¼" OD black plastic tubing, connect the clean-air plenum pressure tap to the LO or Clean
Air Plenum connection on the device. Connect the dirty-air plenum pressure tap to the HIGH or Dirty Air
Plenum connection on the device – Figure 330.4.
330.5 Compressed Air Connection
Supply the header (compressed air reservoir) with clean, dry compressed air between 90 and 105
psi. Oil or water in the compressed air lines will cause the filter media to fail. The airline should be
equipped with a manual shut-off valve, a filter/separator, an air regulator and a pressure gauge, all
located close to the unit. Farr recommends that the compressed air supply be kept at a dew point of -85
F. Make provisions for draining any condensate from the air reservoir with an automatic tank drain or by
other means.
Total air consumption is variable and is dependent on the type and concentration levels of airborne dust
and the set points used for determining the cleaning cycle. See Table 330.5.1 for your compressed air
volume requirement. If your "On Time" or "Off Time" set points are not listed on the table, use either graph
330.5.1 or 330.5.2 to determine your compressed air requirement. Use Graph 330.5.1 if you have 1"
Diaphragm Valves and 330.5.2 if you have 1-1/2" Diaphragm Valves.
PLASTIC
PLUG
LOW PRESSURE TAP
ABOVE TUBESHEET
TUBESHEET
HIGH PRESSURE TAP
BELOW TUBESHEET
FILTER
Figure 330.4
LOCATE 1/8" NPT PLUG
(REMOVE PLASTIC PLUG
AND REPLACE WITH BRASS
ELBOW FITTING INCLUDED
IN HOSE KIT)
3" (APPROX.)
UPPER SIDE PANEL
LOWER SIDE PANEL
1/8" NPT COUPLING
(INSERT BRASS ELBOW
FITTING INCLUDED IN
HOSE KIT)
4" (APPROX.)
BOTTOM OF
FILTER MODULE
0
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