CDF MODULAR DUST COLLECTOR
Page 12
© 2017 CLEMCO INDUSTRIES CORP.
www.clemcoindustries.com
Manual No. 23478 Rev D
WARNING
Make sure the following conditions are met
before performing any maintenance on the
collector.
Turn OFF compressed air supply and
drain air from pulse manifolds.
Lockout and tagout electrical power.
Failure to observe the above warnings can
result in serious injury from the sudden release
of trapped compressed air.
6.1
Replacing Filter Cartridge
NOTE: The recommended changeover pressure is 5.5"
W. C. on the differential pressure gauge. Replace
cartridges when pulse pressure is at maximum of 100
psi, sequence OFF time is 20 seconds, and pressure
remains higher than 5.5".
6.1.1
Lock out and tag out the compressed air supply
and electrical power.
6.1.2
Empty the hoppers and dust receptacles.
6.1.3
Remove the knob and rubber-backed washer
securing the cover plate. When removing filter
cartridges, remove one set at a time. Start at the top and
work down.
6.1.4
Rotate the cartridge 180
o
to remove dust from
the top, and remove the cartridges. A small amount of
sideward force may be necessary to loosen the seal of
the cartridge gaskets. NOTE: Contain dust by sliding a
durable plastic bag over the cartridge as it is removed.
6.1.5
When all cartridges are removed, clean the inside
of the collector to remove loose dust or hardened dust
clods, particularly from the cartridge sealing surface, and
the clean-air side (back) of the cartridge sheet.
6.1.6
Inspect the cover-plate-rim seal, and replace if it
is hardened or damaged.
6.1.7
Install new cartridges per Section 2.10.
6.1.8
Reset timer OFF time to 40 seconds, and set
pulse pressure to 70 psi.
6.1.9
Turn the sequence panel OFF and season
cartridges per Section 6.2.
6.2 Seasoning
Cartridges
NOTE: Filter cartridges must be seasoned before the
initial start-up and each time the cartridges are
replaced.
6.2.1
New cartridges must be seasoned before
starting the pulse cycle. Cartridges are seasoned by
letting a layer of dust (dust cake) develop on the outer
surface of the filter media. The dust cake protects the
filter cartridge and enhances the filtering efficiency; it is
the dust cake that actually does the filtering. Use one of
the following methods to season the cartridges.
6.2.2
Seasoning without pre-treat conditioner
6.2.2.1
Operate the dust collector without pulsing
(sequence switch turned OFF) until the dust collector
differential pressure is 2" above the initial reading, after the
exhauster is adjusted to the correct cfm as noted in
Section 4.3 or 4.4.
6.2.2.2
After the differential pressure is reached, set the
pulse sequence timer per Section 6.2.4 and turn the
sequence switch ON to start the pulse.
6.2.3
Seasoning with pre-treat conditioner
6.2.3.1
Before conditioning the filter cartridges, the
following conditions must be met:
1. All cartridges must be installed and the cover plates
tightly secured.
2. The sequence switch turned OFF to prevent pulsing.
NOTE: Do not turn the sequence switch ON again
until the differential-pressure gauge reads 2"
above the initial reading, as noted in Paragraph
6.2.3.5.
3. Make a note of the exhauster damper setting, and
then set it to 50% open.
6.2.3.2
The recommended treatment is 10 lbs. per 1000
ft
2
(two cartridge racks {4 cartridges}) of filter material.
Conditioner comes 40 lb. sacks. Make sure enough
conditioner is on hand to treat the cartridges as follows:
Model
Filter Area
Lb. of Conditioner
CDF-4
2000 sq. ft.
40 lbs. (one 40 lb. sack*)
CDF-6
3000 sq. ft.
40 lbs. (one 40 lb. sack*)
CDF-8
4000 sq. ft.
40 lbs. (one 40 lb. sack)
CDF-12
6000 sq. ft.
80 lbs. (two 40 lb. sack*)
CDF-16
8000 sq. ft.
80 lbs. (two 40 lb. sacks)
