Installation, Operation and Maintenance manual
23
DFPRE Large Dust Collectors
Weekly
1. Open valve at the bottom of moisture separator bowl and allow collected water
to drain off, then close valve.
2. Check the pressure drop across the filter by viewing the display on the front panel
of the controller. If excessive, refer to Table 1.
Every 2 weeks
1. Check for visible dust emissions in cleaned air plenum. If evident, refer to
Table 1.
2. Check controller settings (refer to controller manual).
3. For units fitted with a sparktrap, open sparktrap inspection cover and check for
dust deposit. Clean dust to avoid fire ignition. Close inspection cover.
Monthly
1. Check dust seals on all access panels for damage or ageing and ensure they are
properly seated to prevent entry of water. This is particularly important where the
collector is located outside or in a wet atmosphere.
Faulty seals must be replaced.
2. Check operation of solenoid and diaphragm valves. If it is found necessary to
replace a diaphragm, refer to Valve disassembly/reassembly.
It may be necessary to check operation of the valves while the system is
pressurized. Care should be taken to avoid injury.
Every 2 months
1. Check connected ducting. Repair any leaks as necessary.
Every 6 months
1. Check general casing integrity and support structure. Repair or replace as
necessary.
2. The fan impellor has been dynamically balanced and the fan assembly vibration
level should be in line with category BV-3, ISO 14694. An assessment of vibration
should be made every six months, or after a significant emission, or after any
misuse and a record kept of measured values. Excessive vibration levels should
be investigated and corrected immediately.
Vibration monitoring is mandatory on category 2G, 3G and 2D fan
assemblies.
Annually
1. Remove and replace compressed air filter regulator element.
2. Remove drain plug and air inlet connections from compressed air manifold. Clean
out any accumulated sludge and inspect to any current local legislation.
It may be necessary to remove a diaphragm valve for internal inspection
purposes.
3. If applicable, check all flameproof enclosures, motors and cable glands for
corrosion and tightness.
In particularly aggressive environments, this period should be more
frequent.
