Parker DUSTHOG PNP, Руководство пользователя

Страница: 18 / 42

14
DUSTHOG PNP Series
4.2 System Operation
As the PNP collects contaminate, the filter will build up a dust cake on the outside surface causing
the filter pressure drop to rise. As the pressure rises, the filters will need to be cleaned or blower
RPM increased in order to maintain the desired airflow. When the filters are cleaned, the dislodged
contaminant will drop to the bottom of the dust collector and collect within the dust drawer where it can
be removed and disposed of. When the system can no longer generate the airflow required to capture or
convey the collected contaminate, the filters will need to be changed.
4.2.1 Airflow Adjustment Using Manual Speed Control
The PNP features an Electronically Commutated (EC) blower that is equipped with airflow adjustment
using the blower RPM. To adjust the airflow, the RPM can be adjusted from 20% to 100% of the
blower rated RPM. As filter pressure builds, it may be necessary to increase the RPM to maintain
proper capture and transport velocity within the hood and duct system. The adjustment of the RPM is
done in the Blower display screen.
4.2.2 Airflow Adjustment Using Auto-Flow Control
With the Auto-Flow feature, the PNP will automatically adjust the RPM of the blower to maintain the
airflow set-point. When the system can no longer maintain airflow, a warning will be provided on the
touchscreen. In the event of a warning or failure on the touchscreen, refer to the troubleshooting
section of this manual to help determine the cause and associated solution.
4.2.3 Filter Pulse Cleaning System Operation
The PNP has three configurations that can be configured to clean the filters:
1. ON-DEMAND – On-demand pulse cleaning system operates on high and low set points. When filter
pressure loss reaches the high set point the cleaning sequence(s) is initiated until the low set-point
has been achieved. The high and low set-point ranges can be adjusted to minimize the required
cleaning sequences to maintain airflow. On-demand is an energy efficient way to clean filters as it
will only consume enough compressed air to clean the filters as required to maintain airflow.
2. CONTINUOUS – This cleaning option will pulse clean the filters continuously at a defined time
interval. The time delay is a setting within the pulse cleaning controls that can be adjusted.
3. DOWN-TIME – This type of cleaning is used in addition to the on-demand or continuous cleaning
options.
• Downtime cleaning will initiate a set number of pulse cleaning cycles when the blower is powered off.
• Filter cleaning is more effective when air is not moving through them so downtime is an effective way
to extend filter life and minimize compressed air consumption