37
7.6 Maintenance of the intake anti-splash-out louvers (only on the version with basin)
The anti-splash-out louvers, located on the air intake opening, are fabricated from a poly-extrusion of fibreglass
and do not necessitate any particular maintenance.
Simply have care that the air passages between the lover blades are always free and unobstructed by foreign
bodies (e.g.: sheets of newspaper) in such a manner that the air, drawn in by the fan, enters the tower without
hindrance.
7.7 Maintenance of the float-valve (only on the version with basin)
Carry out periodically the following checks/interventions:
-
check that the float-valve opens before the water level in the basin becomes insufficient for pump operation, so
that the latter does not drawn in air (check to be executed with cooling tower and pump in operation)
-
check that the float-valve closes before the water level reaches the overflow discharge and above all that it
closes when tower and pump are shut-off, to avoid wastage of water
-
grease periodically the moving parts of the valve
NOTE
:
any eventual adjustments should be effected by moving the float-ball along the lever arm of the valve,
until it is in a position in which both of the above-indicated conditions are satisfied.
7.8 Maintenance of the bleed valve/tap
Ensure that the bleed-off tap discharges freely and that there are no obstructions, even partial, that could limit its
operativity.
If the tap were to become occluded, it can be readily unscrewed from the three-way connection that holds it and
disassembled into its constituent parts for cleaning.
If the occlusion of the tap was caused by deposition of scale, it is possible to effect washing with suitable
products, readily obtainable on the market, which dissolve the scale.
Given the proximity of the glycerine hydrometer and the bleed tap, it is probable that if the latter is blocked then
the orifice of the manometer will also be: it is thus wise that when the tap is dismounted the hydrometer should
also be verified and cleaned as appropriate.
7.9 Maintenance of the water heating system in the basin (if supplied)
If the basin is equipped with one or more electric heaters, the correct setting of the thermostat, the cleanliness of
the various parts of the system and the operation of the low water level cut-out switch must be checked
periodically.
7.10
SUMMARY TABLE OF MAINTENANCE ACTIONS AND OF PERIODIC CHECKS
TYPE OF ACTION
REFERENCE
PARAGRAPH
ONCE A
WEEK
EVERY
MONTH
EVERY 6
MONTHS
ONCE A
YEAR
Check on the water quality in the tower circuit
3.4.5
•
•
Check on the concentration of biological pollutants
6.2
•
•
•
Maintenance of the casing
7.1
•
•
Maintenance of the motor-fan set
7.2
●
•
Maintenance of the fill pack
7.3
●
•
Maintenance of the drift / droplet eliminator panels
7.4
●
•
Maintenance of the water distribution system
7.5
●
•
Maintenance of the anti-splash louvers
7.6
•
•
Maintenance of the float-valve
7.7
•
•
Maintenance of the bleed-off tap
7.8
•
•
Maintenance of the basin heating system (if present)
7.9
•
•
