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7. MAINTENANCE
WARNING !
All maintenance work must be performed by specialist personnel or directly by the
manufacturer, always following safety-at-work procedures.
7.1 Maintenance of the casing
The casing as a whole does not necessitate any maintenance action(s).
Any eventual cleaning operations can be effected as simple washing with soap or detergent and water.
It is however recommended to avoid the use of solvents.
For any eventual breakage of the fibreglass components that might occur, request the repair KIT available for
that purpose and follow scrupulously the instructions for usage.
7.2 Maintenance of the motor-fan assembly
As shown above, the motor-axial fan set does not necessitate any particular maintenance action(s).
A periodic inspection of the motor-fan set is advisable, in order to have the possibility of identifying in good time
any eventual anomalies in its operation, such as vibrations, abnormal noise, excessive absorbed motor current,
breakage of fan blades.
7.3 Maintenance of the fill pack
The fill pack (or heat exchange surface) does not require any particular maintenance, if not that deriving from a
proper treatment of the make-up water.
It is however good practice to effect periodic checks of its state, by means of visual inspection to be made via the
access holes (where foreseen) or via the lower part of the cooling tower (air intake openings or remote sump) in
order to verify: dirt accumulation, presence of scaling, presence of biofilm.
One should also bear in mind that deposits in the fill pack, of whatever nature they may be, increase out of all
proportion the weight of the fill itself (even to 10 times the original), and can damage, even very seriously, the
related support.
Hence, when deposits manifest themselves, it is recommended to effect a shut-down of the installation and to
replace the fill pack
7.4 Maintenance of the drift / droplet eliminator panels
As in the case of the fill material, this component also does not require particular maintenance activity.
It is simply advisable to make a periodic check upon the state of cleanliness of the panels and that these are in
an orderly manner in their correct location and that there are no gaps between one panel and another.
IMPORTANT !
In the case of replacement of the fill pack and of the drift eliminators, it is
recommended to foresee the employment of material identical to the original in
order to avoid alterations in the thermal performance of the tower and in the airside
pressure drops, with consequent possible damage to the motor-fan set.
7.5 Maintenance of the water distribution system
Verify visually that the system is free from dirt and debris; repeat the check foreseen in the chapter entitled
“START-UP”.