Spencer Jet-Clean Cartridge Separator - Manual (Page 7)

7
10. Recheck the
∆
P gauge after the separator has run for
several hours and the differential pressure has stabilized.
If the
∆
P is below 3-4" H
2
0, gradually increase the STEP
time (interval between pulses), using a screwdriver. If the
∆
P is higher than 4" H
2
0, decrease the STEP time. After
each change, let the system stabilize before making
further adjustments.
Note: A pre s s u re drop of 3-4" H
2
0 across the cartridge
will generally provide good results although 1-6" is
c o n s i d e red normal. With any new system, a certain
amount of trial and error may be necessary for optimum
operation.
The system is now ready for use.
Normal Operating Limits
Temperature of the system must remain below the maximum
temperature rating of the filter cartridges used in your separa-
tor. Check the information furnished with your cartridges for
their characteristics and operating limits.
The diff e rential pre s s u re gauge must be located away fro m
excessive vibration, where the temperature does not exceed
140°F (60°C). Avoid direct sunlight.
WARNING: NEVER VACUUM BURNING MATERIALS INTO
THE SYSTEM.
VII. Maintenance
WARNING: DISCONNECT AND LOCK OUT ELECTRICAL
POWER BEFORE PERFORMING ANY MAINTENANCE
PROCEDURE.
Your separator should provide many years of excellent
performance. To assure tro u b l e - f ree operation, perform the
following preventive maintenance steps as indicated:
Daily Check timer, adjust if necessary.
Check the
∆
P gauge for pre s s u re drop acro s s
cartridges.
Check for proper discharge of collected material
from the separator.
Weekly Check timer and solenoids for proper operation.
Monthly Lubricate rotary airlock if present.
Inspect seals for dust leaks.
Quarterly Inspect cartridges for damage or leaks.
Inspect, clean or replace
∆
P gauge air filters.
Lubric ate vacuum producer ac cording to
instructions in vacuum producer manual.
During these regular checks, be alert to problems such as the
following that may arise or become worse over time.
Filter Blinding . (Filter medium is filled with dust that cannot
be removed by cleaning pulses.) Blinding is indicated by a
high
∆
P that does not drop when the filters are pulsed for a
period with the vacuum producer turned off. Two common
causes are filter overloading and moisture pickup from the
dust-laden air or the compressed air. Also, certain dusts have
high blinding tendencies. If blinding is severe, consult your
Spencer Representative for assistance and a possible
change of filter media.
Dust Re-entrainment. (Dust loosened during cleaning
redeposits on the filter medium.) Re-entrainment leads to un-
usually high filter loading and often a high pressure drop. One
possible cause of re-entrainment is discharge hopper overfill -
ing. There may be bridging of collected material in the hopper
or an inadequate dust discharge system. Also, some types
of dust are more susceptible to re-entrainment than others.
Remedies may involve increasing the capacity of the dust
d i s c h a rge system, installing a high level alarm, adding a
debridger in the hopper, and/or changing the filter medium.