17
Dalamatic Insertable Dust Collectors – Series DLM V
Installation, Operation and Maintenance Manual
Figure 14 Schematic diagram showing typical interlock system for a Dalamatic dust collector installation
* For fans powered by 11kW motors or above collectors are connected for star delta starting as standard
L1
L2
L3
N
Start
N/O aux.
contact
O/L
Stop
Rotary valve(s)
Conveyor
Compressor Controller
Fan*
INSTALLATION
Interlocks
Discharge equipment such as belt feeders should be separately controlled but
interlocked with the dust collector controller (see fig. 14).
The design of the electrical circuitry controlling equipment associated with the
Dalamatic dust collector should be such that breakdown of any one of the
associated pieces of equipment does not cause a complete blockage of the
collector. For example, should the motor of a belt feeder 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 14 which also allows for the compressor
etc. to operate without airflow through the collector, to facilitate clearance of the
filter elements in the event of blockage due to failure of non-electrical equipment.
