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Extract Units
Before a emp ng to carry out any maintenance work, inves ga ve or repair work on our
units, the unit MUST BE COMPLETELY ISOLATED
from its electrical supply. Ensure a minimum
of two minutes a er electrical disconnec on before removing access panels.
Warning
Before a emp ng to carry out any work on our units, all accompanying documenta on
including warning labels on the unit must be referenced.
Should it be necessary to remove any component ensure that these are secured into
posi on once reinstalled. It is cri cal that a er any maintenance work has been conducted
that all components removed/replaced be refi ed correctly by a competent engineer
Important
In general, this series of units require li le maintenance. Regular inspec on for damage
and cleaning. In the unlikely event of component failure, spares are available from stock
at VES.
Ensure the unit has been allowed to completely cool before a emp ng any work to the
unit.
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Ensure impellor has been allowed to completely stop before a emp ng to carry out any
work on this unit.
When accessing the unit always use the handles to ensure the access panels are
handled/opened in a controlled manner so as to avoid damage to the unit or injury to
personnel. This is par cularly important with bo om access units.
Once maintenance has been carried out ensure the motor assembly is secured correctly
before restar ng the unit.
Remove the access panels and loosen the bolts holding the inlet eye in place Align the
inlet eye and impeller ensuring the inlet eye is central to the impeller and make sure gap
‘
A
’ is constant. Hand gh ten the bolts and rotate the impeller t o ensure the it runs
smoothly, secure into posi on b y gh tening the r etaining bolts.
Impeller/Inlet Eye
Alignment
The impeller should rotate freely and this posi on is factory set. In the unlikely event of
movement during transit or opera on realign the impeller with the inlet eye.
Important
Maintenance
8
A
Fig.
17
Cau on
Ensure that the clearance gap “A” between fan and inlet eye is constant. Misalignment
may cause undue wear on the impeller and inlet eye.
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