Advanced filter pressure monitoring option, Hmi screen – FloAire PCU Filtration User Manual
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Advanced Filter Pressure Monitoring Option
The PCU Filter Monitoring Module (PCUFMM) utilizes proprietary algorithms to make determinations
about filter loading percentages as well as fault conditions, such as missing filters and missing doors.
These algorithms take into consideration known characteristics and interactions of many specific filter
combinations, stored calibration values derived from measurements taken at the time of test and balance,
and measurements of the dynamically changing current operating conditions such as demand
ventilation. Personnel servicing the PCU have direct access to operating characteristics and fault
conditions through the use of an HMI (Human Machine Interface), which is conveniently located directly
on the PCU. Accurate monitoring of PCU filter conditions not only ensures proper operation of the PCU,
but can also reduce the operating cost of the PCU by reporting the condition of each individual filter
module. This can eliminate the needless replacement of filters that have not yet reached the end of their
useful life.
Features and Benefits:
•
Monitors pressure drop across each filter module of the Pollution Control Unit (PCU).
•
Optional shutdown of Fans and Cooking equipment with a Missing Door (of the unit) fault or
Missing Filter fault.
•
Detects Filter Clogged Condition. Based on choosing of an optional Electrical Control Package, if
clogged condition persists for 24 hours, an audible alarm will begin to sound. If the clogged
condition continues to persist for an additional 48 hours, a signal will be sent to the electrical
control package that will prevent the fans and cooking equipment from restarting the next time
they have been manually turned off.
Several techniques are employed to ensure the validity of the pressure readings. Consequently
disturbances caused by events such as fan starting and stopping, filter door removal and sudden
changes in building or atmospheric pressure will cause a delay in updating the faults until the
disturbances have subsided and enough fresh data has been gathered.
The filter monitoring system has 8 ports which are used based on the number of filter modules in the PCU
assembly. The following chart shows the port connections used for different PCU configurations. PORT 7
is used only if the PCU assembly has a blower installed. The unused ports remain exposed to the space
in the cabinet. Port 8 (Atmospheric Port ) is used to measure ambient pressure, external to the PCU.
PCUFMM PORT CONNECTIONS
No of PCU filter
modules
PORT 1
PORT 2
PORT 3
PORT 4
PORT 5
PORT 6
PORT 7
PORT 8
1
YES
YES
NO
NO
NO
NO
YES/NO
YES
2
YES
YES
YES
NO
NO
NO
YES/NO
YES
3
YES
YES
YES
YES
NO
NO
YES/NO
YES
4
YES
YES
YES
YES
YES
NO
YES/NO
YES
5
YES
YES
YES
YES
YES
YES
YES/NO
YES
HMI Screen