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DUSTHOG PNP Series
3.3.5 After-Filter Installation/Replacement
If an after-filter option is selected by the customer, those filters will be shipped separate of the unit to
be mounted following unit installation at the customer facility.
Proper removal and installation of each filter type is shown in Figure 4.
Center the filters atop the unit when viewed from the front, the two after-filters will be butted against
each other in the center of the unit (looking at it from the side) from front to back just as with the
internal filters. Reference balloon #4 in Figure 4.
The hold-down brackets are to be placed on top of the filters as shown and secured down with all-
thread rods, washers and nuts. Tighten nuts using hand tools and be sure not to over compress the
gasket on the bottom side of the after-filter. Minimal torque should be applied, just enough to cinch
down each bracket so it can't slide around on top the filter(s). The gasket on the filter should be
compressed by 30-50%. A center bracket is also supplied that runs in the same direction, it is placed
immediately over the seam where the two filters are butted together. Reference balloon #5 in Figure 4.
Larger size unit after-filter setups will be installed in an identical fashion. The filters will always be
installed in-line, directly over the perforated square cutouts on the top panel.
If a housed after-filter option is selected, the install will be similar except there will be a cabinet to
insert the filters into. They will rest on cam bars the same style as the ones used in the primary filter
cabinet. When the filters are inserted and pushed all the way back into the cabinet the cams can be
rotated upward to seal the filters. Reference balloon #6 in Figure 4B.
3.4 Electrical Connection
The PNP customer electrical connections are located on the rear of the unit as shown in Figures 1B.
The supply voltage and FLA will be noted on the nameplate. The blower and pulse cleaning system
controls are factory pre-wired for operation. The touchscreen controls are also pre-wired for the integral
option, but require field wiring and connections for the remote display enclosure option.
Wiring diagrams for the various PNP controls, blower arrangement and supply voltage options are
available within the appendix of this manual. Note that the PNP does not contain the main disconnect
or fuses for the supply power. Electrical installation should be completed by a qualified professional and
done in accordance with all applicable codes and regulations.
Unit is available in the voltages shown below:
VOLT PH BLOWER QTY.
380
480
575
380
480
575
380
480
575
380
480
575
Power cord and connection into unit will be supplied by the customer.
HZ
RPM
3
1
50-60
4,200
3
1
50-60
4,200
3
1
50-60
4,200
3
2
50-60
4,200
3
2
50-60
4,200
3
2
50-60
4,200
3
3
50-60
4,200
3
3
50-60
4,200
3
3
50-60
4,200
3
4
50-60
4,200
3
4
50-60
4,200
3
4
50-60
4,200
TABLE 1
PNP Voltage and Full Load Amps
10
FLA
XFMR
6.7
---
5.5
---
11.4
5kVA
12.9
---
10.5
---
21.8
10kVA
19.1
---
15.5
---
32.2
15kVA
25.3
---
20.5
---
42.5
30kVA
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