Software Description; Functions; Operation - Lincoln Electric PRISM COMPACT Operator's Manual

®
PRISM COMPACT

SOFTWARE DESCRIPTION

The Prism® Compact is controlled by a PLC using Eaton
Smartwire technology and the following software functions:
1) Start/Stop Fan feature activated by push button on cabinet
front.
2) Remote Start/Stop Fan feature activated by an external switch
or remote control.
3) Automatic main lter cleaning function triggered in the
following cases:
a) Filter bank of ine/online cleaning active immediately,
cleaning is dependent upon fan differential pressure-- the
pressure the lter creates to air ow-- and your set points.
b) Of ine cleaning when fan is off.
c) Online cleaning when fan is on.
d) Of ine lter pressure cleaning active at three levels of
lter pressure drop (low, medium, high). Each level
gradually increases lter cleaning.
e) Low pressure default value is 400Pa, with a range of
300Pa to 1000Pa. Medium pressure default value is
600Pa, with a range of 500Pa to 1200Pa. High pressure
default value is 800Pa, with a range of 700Pa to 1400Pa.
f) When the fan is running the lter pressure is monitored.
Once a level is reached, the system will wait for the fan to
shut down before of ine cleaning begins. Aside from
hearing air blasts cycling to each lter, the white light will
ash as a visual indication that the unit is cleaning. The
white light will return to steady once the cleaning cycle is
completed. Each valve starting from the top is pulsed with
compressed air. The default pulse time is 250ms. After the
rst valve is pulsed, the next one is delayed. This delay is
the valve pulse timer at work, and the default delay time is
15 seconds. The delay allows the air accumulators within
the lter bank to charge.
g) When all the lters have been pulsed, the cleaning cycle
has completed. At the low pressure limit the the cleaning
cycle is 2X. At the medium pressure limit the cleaning
cycle is 4X. And at the high pressure limit the cleaning
cycle is 6X. Each level cleans the lter more aggressively
but takes longer to clean when the cycle is off.
h) If the fan is turned on before the cleaning cycle has
completed of ine cleaning will pause. Once the fan is
turned off, lter cleaning will resume at the same
sequence it was stopped at.
i) Online cleaning is activated with the Delta P pressure drop
settings. Default level is 1000Pa with a range of 100Pa-
2500Pa. When the fan is running, and the Delta P level
has been reached, the Power On white light will ash and
lter cleaning will start from the top. The same pulse and
pause times from the of ine cleaning are used. Online
cleaning will not stop until the lter pressure falls below
the Delta P level.
j) Once the fan is off, of ine cleaning will be active.
4) The Delta P Alarm default is set at 1500Pa. When the alarm is
active, the red Alarm light will blink on the main control
cabinet. At this time lters should be ordered from Lincoln
Electric.
5) The PLC will trigger an Alarm in case of:
a) Motor speed control (VFD) Faults with a solid red alarm
light.
b) The lter is clogged due to passing the *Differential Filter
(DP) Alarm setting, giving you a ashing on/off red Alarm
light.
* The VSS alarm can be reset by pushing the reset alarm button.
* The DP alarm only stops once your DP pressure across the filter is below
the alarm set point.
FUNCTIONS OF THE PRISM® COMPACT
FILTER UNIT:
1) Manual start/stop ventilator
2) Remote start/stop of unit along with a "running" signal
available that the remote Robotic Welding Cell can monitor.
3) Adjustable ventilator speed via a duct mounted pressure
sensor and a PID loop that controls the motor speed with a
Variable Frequency Drive (VFD).
4) Automated on line lter cleaning
5) Automated off line lter cleaning
6) Manual off line lter cleaning
7) Alarm signal (optical) for:
a. Faulted VFD (Variable Speed Drive).
b. Clogged lter
8) Reset Alarm

OPERATION

Start/Stop Fan - ventilator operation is activated with the
Start/Stop Fan push button or with the remote Start/Stop.
NOTE: remote input takes precedence in operation. If the remote
signal starts the unit, pushing the Start/Stop Fan button on the
control panel will not stop the fans. The remote signal has to be
removed (opened) This will allow the Start/Stop Fan button to
operate normally again.
NOTE: the fan has a 30 second restart delay, indicated by a
blinking green light. This protects the VFD from over current
due to rapid off/on cycles.
Reset Alarm - Reset Alarm push button is used to reset the
alarm if the VFD faults. There are fault codes that can be read off
the VFD LCD.
CAUTION: only quali ed persons with proper protections in place
should open control cabinets under power.
Ventilation Fan Speed and Operation - Ventilator fan is
set for proper air ow during installation by setting a parameter
in the VFD. The fan uses a duct mounted pressure sensor which
gives a 0-10 VDC reading back to the controls, which allows a
constant air ow to be maintained up to the limits of the fan motor
operation during lter loading. The speed of the fan will be
automatically adjusted between the minimum (35Hz) and
maximum (60Hz) speeds. Consult the tablet operation guide, or
contact Lincoln Electric service department for guidance with
adjustment of the fan parameters.
A solid red alarm light indicates a problem was detected by the
VFD and it signaled the controls, the controls will try to reset the
VFD when you press the VFD Fault Reset button. If the alarm will
not clear or returns you will need help from your quali ed
maintenance personal to review the VFD for possible fault
conditions and address them.
B-3
OPERATION