Nordson Encore XL Powder, Manual

Page: 62 / 155

© 2021 Nordson Corporation
1607027-01
6-2 Maintenance
Periodic Maintenance
NOTE: You may need to perform these procedures more or less often, depending on
your application requirements.
Table 6-2 Periodic Maintenance Procedures
Component Maintenance Procedure
Air Flow
Take regular airflow readings. A properly functioning powder feed center should provide a
face velocity of around 125 fpm. A lower reading indicates clogged filters or a malfunctioning
fan.
Fan Motor
Perform the following checks regularly. Problems will be apparent if you notice changes in
the following factors.
• Pay attention to changes in vibration and noise levels.
• Take current readings regularly.
• Check all electrical connections regularly.
Cartridge Filters/Final
Filters
Check the differential pressure gauges on the pneumatic panel.
• Cartridge Filters: (shows air pressure drop across the cartridge filters in w.c.) The gauge
should read 4–6 in. w.c. The gauge reading increases as the filters load up with powder.
• Final Filters: The gauge should read 1–2.5 in. w.c. The gauge reading increases as the
filters clog. At 3.0 w.c., the system automatically shuts down.
Check all filters and replace them if necessary.
Remove the final filters and inspect the fan housing. Signs of powder inside the fan section
indicate a leaking cartridge filter.
Compressed Air
System
Open the drop leg and use a clean, white cloth to check for contaminants. Correct any
problems immediately. Drain the air filters and change the elements as necessary.
Electrical System
Tighten all electrical connections and inspect for loose or broken wires.
Check the electrical system for electrical safety every 12 months. The system must comply
with all local, state, and federal codes.
System Grounds
Check all equipment grounds. Electrical equipment must be grounded according to code.
For maximum transfer efficiency and safety, electrostatic equipment must be grounded to
provide a complete circuit from the spray guns through the workplace hangers, conveyors,
and booth back to the gun controllers.
Refer to
Grounding
in the
Safety
section of this manual and to publication number TCTT-06-
3881 on the Nordson emanuals web site (http://emanuals.nordson.com/finishing) for more
information on powder coating system grounding.
Air Tubing
Pressurize the system and listen for air leaks. Replace or repair any leaking tubing or
fittings.