Installation, Operation and Maintenance manual
15
PowerCore
®
Dust Collectors - Series CPC
of a rotary valve fitted to the collector cease to function, the collector housing will
gradually fill with dust until completely choked. Failure of the compressor could also
cause a similar blockage.
It is therefore important that the starters of all ancillary equipment be interlocked to
ensure:
1. Correct starting sequence;
2. Operation of a warning system, or alternatively stoppage of the entire installation
in the event of a failure of any of the auxiliary motors;
3. Correct stopping sequence.
Such interlocks are illustrated in figure 7 which also allows for the compressor etc. to
operate without airflow through the collector, to facilitate clearance of the collector
in the event of blockage due to failure of non-electrical equipment.
EEx controls
When the dust collector is to be installed in a hazardous area where there is any risk
of fire or explosion, the collector will be marked for the area(s) it can be safely used
within (refer to collector serial nameplate). The collector may be fitted with either of
the following control systems:
• EExd solenoids and remote controller
When this option is fitted, the dust collector has its solenoid valves in an EExd
IIb T6 enclosure mounted on to the collector body. A controller, housed in an
IP66 box, is supplied loose. This must be installed in a safe area and connected
to the solenoid valves on the dust collector using suitable cabling (not supplied).
It is recommended that cable with a core size of maximum 1.5 mm² is used.
The maximum length of cabling that can be used is 100m.
Instructions for setting up the controller are the same as those for the standard
controller.
• PT Controller
The PT Controller is a pneumatically operated device which operates the diaphragm
valves in sequence, therefore the need for an electrical supply is eliminated.
The controller is supplied complete with air regulator and is normally bracket-
mounted directly to the collector.
For PT Controller connections and set-up, refer to Publication 2697.
Antistatic earthing
If the collector is fitted with an earthing post (see the symbol shown) it is particularly
important that the earthing post is properly connected to earth, using the fixings
provided, to prevent any static build-up.
Collectors with dust containers will have two connection points, located on
the collector and the dust container base.