RPH DUST COLLECTOR
Page 6
CAUTION
Do not pulse new dust collectors or
replacement cartridges until the cartridges are
properly seasoned. See Section 6.2. Pulsing
unseasoned cartridges could cause premature
cartridge failure or decrease the efficiency of
dust collector.
3.2.2
With the sequence switch off, pressurize the
pulse manifold to 100 psi and check pneumatic
connections for leaks.
3.2.3
Turn pulse pressure to 20 psi and switch the
pulse sequence on. Check the air pulse and sequence
of the diaphragm pulse valves, solenoids, and panel
timer. After all items are checked, adjust the pulse
pressure to 70 psi, and turn the sequence switch off.
Do not switch the sequence panel on until the
cartridges are seasoned per Section 6.2.
3.3 Operational
Start-Up
3.3.1
Make sure access doors are closed, and dust
drums are secure.
3.3.2
Check to make sure the sequence switch is "on".
CAUTION
Do not turn the sequence switch on until the
cartridges are seasoned. See Section 6.2.
3.3.3
Start the exhauster at the control panel.
3.3.4
Pressurize the pulse manifold and check the
manifold pressure.
3.4 Shutdown
3.4.1
Allow the system to run until all system
components are empty (see the accessory components
operation manual) and all areas ventilated are free of
airborne dust.
3.4.2
Turn off the exhauster.
3.4.3
Shut off the air supply to the pulse manifold.
3.4.4
Drain the pulse manifolds. The drain cock is
mounted at the bottom of each manifold. See Figure 1.
Drain whenever the air supply is turned off.
3.4.5
Empty all dust receptacles.
4.0 ADJUSTMENTS
4.1
Pulse Manifold Pressure
4.1.1
A pressure regulator and gauge is provided on the
manifold inlet to adjust pressure to 70 psi. An additional
manifold pressure gauge is mounted on the differential
pressure gauge panel to enable monitoring pressure from
ground level. The panel is usually mounted on one of the
dust collector legs. See Figure 3.
4.2
Pulse Sequence Control Panel and Timer
4.2.1
A toggle switch mounted on the sequence control
panel cover (located on the dust collector stand), enables
or disables the sequencer. If the switch is "on", the pulse
sequence will automatically start whenever the dust
collector exhauster is started. If the switch is "off", the pulse
sequence will not occur. The switch should be left "off" (no
pulse) until the cartridges are seasoned. See Section 6.2.
4.2.2
The timer is factory set at 40 seconds "off" and
15/100 of a second "on". Every 40 seconds, one filter bank
is pulsed in sequence until all filters have gone through a
cycle.
4.2.3
As the filters cake with dust, the pulse may not
clean them well enough to bring the differential pressure
gauge below the recommended changeover pressure of
4". A constant reading higher than 4" is an indication that
more frequent pulse cycles or higher pressure are needed.
When the differential pressure gauge shows a constant
pressure difference greater than 4", adjust the "off" time
setting by half. DO NOT ADJUST "ON" TIME. Increasing
on time will consume more air, but will NOT increase
cleaning efficiency.
4.2.4
When the frequency of the pulse cycles will not
lower the differential pressure to less than 4", or if a
decrease in the efficiency is noted, increase pulse
pressure in increments of 10 psi until the maximum of 100
psi is reached.
4.2.5
When the frequency of the pulse cycles and
higher pulse pressure will not lower the differential
pressure below the changeover pressure of 4" w. c., the
filter cartridges should be replaced, and the timer "off" time
should be reset to 40 seconds, and pressure set to 70 psi.
See Section 6.1.
