8
chem-proof Ex roof fan
SPARK-CHEM/Ex
04.06.2019
CAUTION: Isolating switch ought to be installed beyond the explosion risk area, near the fan.
7. Operational Use
Construction and reliable execution of the fan provide longevity of operational use without the
everyday routine technical supervision.
Periodically, examine the mechanical and electri-
cal connections, the state
of grounding, and additionally provide efficient cooling to the
motor
.
During the use check subsequent aspects:
–
operational quality of the motor
–
occurrence of eventual vibrations
–
width of the circumferential clearance between the impeller and the inlet confusor (funnel)
–
the state of the fan grounding
–
the state of the hood, shielding
Stop the fan in case of:
–
excessive vibrations and noise
–
motor overheating
–
smoke emerging in the motor
–
damage of the fan elements
In case
when symptoms
of incorrect function
(
increased
noise
level,
vibrations, redu-
ced vo
lume flow efficiency
)
of the device
are
noticed,
disconnect the fan from the power
supply system and
undertake technical revision in order to spot the causes of
the
faulty
function
.
In case of every repair or the spare part replacement
(
according to ATEX
2014/34 Directive
)
it is
important to apply
the
adequate information on an
additional plate
or in the
enclosed documentation
(
a register log
of
repair activities,
etc
.
).
This is the duty of User!
A list of most frequent functional malfunctions and their corrective measures is listed below.
8. Troubleshooting Guide
Table No.3
Problem
Possible reason
Corrective action
1
.
Sudden drop of the inta- Obstacle objects, pollutants redu-
Clean the inlet guard.
ke flow efficiency.
cing the air flow got stuck at the
inlet guard.
2
.
Sudden vibrations of the Obstacle objects reducing the air
Disconnect the fan from the power
fan occur.
flow got stuck in the impeller.
system, and remove the obstacle.
Impeller is defective.
Replace the impeller and the motor
for new.
3
.
It is not possible to start Fade of one of the phases or the
Adjust to gain the correct supply
the fan.
voltage is too low.
voltage.
The block of protections got
Adjust the correct settings of pro-
activated.
tections.
9. Maintenance
In the aspect of operational use, the fan construction
guarantees its efficient function without
continuous everyday technical supervision
. It is recommended to
perform technical inspections
in regular terms, to obtain efficient functional performances of the fan
and to meet the rules of
Occupational Health and Safety.
