7
—29
Make sure that there is no paint damage during mounting and dismounting and in case that paint is
damaged, same needs to be repaired before commissioning
After 5 hours (at least!) check the belt tension and adjust it if necessary.
After 12 hours, check all visible screws and retighten if necessary.
By regular inspection of the fan inlet make sure debris has not collected on the
guard and clean if necessary !
In case of extended periods of standstill, loosen the tension of the drive belt in
order to release the load on the bearing!
6.3.
Normal operation
•
The fan may only operate at speed specified in the technical data. Any change of speed or speed
range requires the prior consent of the fan manufacturer.
•
Fans need to work at least 30 minutes a week
•
After 6 month period fan needs to be checked for proper electric motor operation, check vibrations,
noise and inspection of seals and if it will be necessary service of fan needs to be done with original
spare parts
•
If the fan runs unevenly, open all control and shut-off devices until the fan is running smoothly. If
smooth operation cannot be achieved, the fan is likely to run outside the operating range indicated by
the characteristic. Also, the flow is pulsing, and there is a deep booming noise.
•
In such a case, the unit loss must be reduced, as
OPERATION WITHIN THE PUMP RANGE IS PROHIBITED!
•
The fan is working most efficiently if the inlet and outlet are without obstacles
•
In fans that convey dusty and adulterated gases, the impeller might become covered in dust particles,
forming deposits of various thicknesses. Therefore, inspect the impeller regularly and at intervals that
suit the actual operation conditions. As the actual time of inspection depends on the operating
conditions, it is the responsibility of the operator to determine the intervals and enforce compliance.
•
If, after prolonged shutdown, the machine is running unevenly, check the impeller for wear and
deposits. Worn impellers must be replaced. Caked impellers must be cleaned by the operator.
•
When starting the unit for continuous operation, we recommend regularly checking the power
consumption of the motor. If, at the start-up of the fan, the temperature of the air is below the projected
operating temperature, the air density is higher, leading to increased power consumption by the motor,
and reduced characteristics of the fan.
7
Maintenance and repair instructions
Before any maintenance work is undertaken:
· Stop fan in accordance to regulations and disconnect all
poles from mains supply.
· Wait until impeller is stationary!
· Make sure that a restart is not possible!
Use only original spare parts tested and approved by
the manufacturer.
7.1.
General instructions
•
No maintenance work should be attempted before switching off and completely isolating the fan assembly,
its anti-condensation heater (if fitted), and its controls from all electrical supplies and allowing the rotating
parts of the fan to come to rest.
•
When carrying out inspection or maintenance work, always observe the instructions in the technical
documentation.
•
The maintenance intervals are by the mode of operation, the ambient conditions and the required
availability. It must be determined by the operator of the fan in the context of the plant layout.
Recommended maintenance intervals are given in the table below. Should the environment be particularly
dirty, a reduction in the intervals may be necessary.
•
Internal and external fan surfaces may be cleaned with low pressure clean water and non-abrasive
additives. Direct application of water from any direction to the motor drain plugs must be avoided.
•
The installed roller bearings must be lubricated according to the instructions laid down in the lubricant list.
All lubricants must be stored in a dark, cool place without dust, and protected against oxidation.
•
Keep a stock of spare parts that might not be available at short notice.