Troubleshooting guide

Check the differential pressure reading across the
dust collector clean to dirty air sections. A normal
differential pressure drop reading is between 1"-6" w.g.
(25-152 mmAq). At start-up, this reading is generally in
the 1"-3" w.g. (25-76 mmAq) range. Please list the
reading here for future reference.
Initial dust collector differential pressure reading across
filters is ___________ " w.g. or ___________(mmAq) on
___________ (date).
NOTE: If your system is controlled by the Supra-I.Q.
Diagnostics Panel, the yellow airflow alert light
may be illuminated. This is normal unitl the “Air
Flow Calibration” routine has been performed
at the Supra-I.Q. Diagnostics Panel. This must
be performed during start-up of your dust
collection system once all of the inlet(s) and
ductwork is in place and the outlet damper (if
required) is opened 75%. Refer to the Supra-
I.Q. Installation and Operation Manual and
perform the “Code 4 - Airflow Settings” steps.
5.3 CHECKING THE PULSE CLEANING
SYSTEM WITH YOUR CONTROLLER
Check the cleaning system for proper operation. The
compressed air pressure should be between 90-110
PSIG (6.2-7.6 BAR). The Supra-Clean, Supra-View and
Supra-I.Q. panels are factory set to pulse every 10
seconds. Refer to the Supra-Clean, Supra-View or
Supra-I.Q. Installation and Operation Manual to change
these initial settings. Check to ensure the pulse
(diaphragm) valves are “firing” at approximately 10-
second intervals and deliver a crisp sounding pulse to
each filter. The valves should not deliver a weak or
lingering pulse. To check the pulse sequence for proper
firing, perform the following:
• If your system is supplied with a Supra-Clean
timerboard (with Magnehelic or Photohelic Guage) or
Supra-View Panel, place the “Continuous Clean/PS”
switch on the timerboard to the “Continuous Clean”
position. The MOT AUX terminals at the timerboard
must have continuity for the pulsing to become
active. To activate, energize the motor starter to
close the isolated auxiliary contact wired to the
timerboard MOT AUX terminals. Verify robust and
consistent pulse firing of each valve.
• If your system is supplied with a Supra-I.Q.
Diagnostics Panel, place the system in “Continuous
Clean” by entering Code 5. At the “SET MODE” state,
enter “1” for continuous cleaning. Terminals 1 and 2 at
terminal strip P7 must have continuity for the cleaning
system to activate. Allow 45 seconds after panel
power-up for pulsing to start as the Supra-I.Q.
cleaning mode(s) operate on a delay. Verify robust
and consistent pulse firing of each valve. When test is
complete, enter code 5. At the “SET MODE” state,
enter “2” for Auto-tune cleaning mode.
5.4 OPERATING ADJUSTMENTS
Please confirm the type of pulse cleaning controller
delivered with your system. Your system was delivered
with one of the following:
• Magnehelic Guage with Supra-Clean timerboard
• Photohelic Guage with Supra-Clean timerboard
• Supra-View Pulse Panel
• Supra-I.Q. Diagnostics Panel
NOTE: It is important that the compressed air pressure
in the manifold is above 90 PSIG immediately
prior to a pulse. If the delivery capability of your
compressed air source cannot return the
manifold pressure to above 90 PSIG during the
“Pulse Delay” (time between pulses) interval,
adjust the pulse delay at the timerboard or
Supra-I.Q. and monitor the pressure. A longer
interval will raise the operating pressure and a
shorter interval will lower the operating
pressure. Allow sufficient time for the system to
stabilize after each adjustment before making
any further adjustment. Adjust until the desired
manifold pressure is reached.
MAGNEHELIC GUAGE CONTROL WITH
SUPRA-CLEAN TIMERBOARD
When using a Magnehelic Guage with Supra-Clean
timerboard, the timerboard is always set to “Continuous
Clean” pulse mode. If the filters are operating at a higher
or lower pressure than desired, adjusting the pulse
frequency (Pulse Delay) can often modify the steady-
state pressure. The factory setting is 10-second
intervals. Adjust the “Pulse Delay” on the Supra-Clean
timerboard and monitor the pressure on the Magnehelic
Guage. A longer interval will raise the operating
pressure and a short interval will lower the operating
pressure. Allow sufficient time for the system to stabilize
after each adjustment before making any further
adjustment. Adjust until the desired manifold pressure is
reached.
28
United Air Specialists, Inc.
Supra-Blast
Cartridge Dust Collector
Revised 02/02