Spencer Jet-Clean Cartridge Separator - Manual (Page 6)

6
6. Compressed Air
Connect a source of cle an, d ry (instrum ent qualit y)
c o m p ressed air to the air header. Air consumption is
approximately 1.9 scfm per pulse when the pulse duration is
100 ms. The compressor and its piping must be adequately
sized to deliver a constant pressure of 90 to 100 psig at the
header, even with other users on line.
7. Optional Accessories
D i ff e rential Pre s s u re (
∆
P) Switch senses pre s s u re dro p
through the filter cartridge and activates the sequence timer.
This switch should be connected to the pressure switch input
terminals on the timer (see diagram on page 5). When the
∆
P
rises to a preset point, the cleaning cycle is initiated.
Cleaning continues until the differential pressure drops below
the low set point.
No te: If a
∆
P switch is not used, the pre s s u re switch
terminals on the sequence timer should be shorted out with a
jumper (see diagram on page 5).
A i r l o c k s should be electrically inte rlocked to sta rt
simultaneously with the vacuum producer. They should also
be furnished with a time delay to permit them (and the
pulsing action of the separator) to continue for two to three
minutes after the vacuum producer shuts down.
VI. Operation and
Adjustments
Startup Precautions
Make an operational check of all components to detect any
problems before the unit goes on line. Check the following:
Sequence Timer. When power is switched on, the re d
“power on” indicator should light. The individual timing lights
should blink, one at a time, at the preset intervals.
Solenoids. Clicking of solenoid valves should be clearly
audible during operation. Exhaust air from each valve can be
felt at the discharge port when the valve is pulsed.
Air Diaphragm Va l v e s . When actuated, each valve emits a
blast of air that can be heard clearly.
Cartridges. Inspect cartridges to be sure:
Cartridges are tightly seated with proper gasket and
washers.
Wing nut is hand-tightened securely.
Tubing and/or Ductwork. Be sure all connections are tight
and all cleanout ports are closed. (Leaky tubing can result in
poor overall system performance.) Tubing, piping and
ductwork must be free of debris. Make sure access doors are
closed. Check all gaskets for leakage.
Blower or vacuum producer, airlock and other accessories
d i ffer from system to system. Perform the appro p r i a t e
checks, which may include:
Check for proper direction of rotation as marked on the
equipment.
Inspect rotating equipment and remove foreign objects.
Be sure all guards and other safety equipment are in
place.
WA R N I N G : KEEP HANDS OUT OF AIRLOCKS TO
AVOID INJURIES.
Separator Startup
1. Close all doors and ports, with sequence timer and
auxiliary equipment off.
2. Turn on compressed air to separator and inspect the jet
pulse system for leaks. If air is leaking through any valve
with the timer off, there may be a leak between the
solenoid and diaphragm valve. Inspect the 1/4” tubing
between the solenoids and diaphragm valves to be
certain all connections are tight and leak-free. The tubing
must not be crimped. Shut off compressed air supply.
3. Tu rn on sequence timer. The red “power on” indicator
should light. Individual timing lights should blink, one at a
time, at preset intervals. The corresponding solenoid
valves will be activated; clicking of the solenoid valves
should be clearly audible.
4. Turn the air supply to the air header on again. All solenoid
valves should be cycling. Feel for the exhaust air fro m
each valve.
5. Confirm the STEP time is between 10-20 seconds (preset
at factory). This may be adjusted later, based on the dust
loading in your particular system. Let the separator pulse
for ten minutes to clear all lines.
6. Confirm that all dust discharge equipment such as rotary
valves and conveyors is interlocked to start with the
vacuum producer. If not, turn them on.
7. Start the vacuum producer with the butterfly valve set at
about 50% of maximum airflow and allow equipment to
run for 30 minutes.
Note: It is good practice to introduce the dust stream to
new filters gradually. This is particularly true with very fine
solids (less than 2 microns) or high dust concentrations.
8. Check vacuum producer exhaust line for dust. If present,
shut off system and correct problem.
9. Observe the diff e rential pre s s u re gauge. At startup the
pressure drop will be low, approximately 1/2" to 1" H20.
After 30 minutes of operation, the cartridges will start
to coat with filtered dust. The filtering efficiency and
d i ff e rential pre s s u re will increase. At this point, open
the butterfly valve of the vacuum producer to its design
setting.