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8 - MAINTENANCE
Contact with the exchanger fins can cause cuts. Wear
protective gloves to perform the above described operations.
It is extremely important that the battery gives the maximum
thermal exchange; therefore, its surface must be cleaned from
dust and deposits. Remove all impurities from the surface.
It is extremely important that the battery gives the maximum
thermal exchange; therefore, its surface must be cleaned from
dust and deposits. Remove all impurities from the surface.
Using an air pressure gun, clean the aluminum surface of the
battery. Be careful to direct the air in the opposite direction of
the fan air movement.
Hold the gun parallel to the fins to avoid damages. As an
alternative, an aspirator can be used to suck impurities from
the air input side.
Verify that the aluminum fins are not bent or damaged. In the
event of damages, contact the authorized assistance center
and get the battery “ironed out” in order to restore the initial
condition for an optimal air flow
It is very important for the exchanger to be able to provide the
maximum thermal exchange. Therefore, it is essential for the
inner surfaces to be clean of dirt and incrustations.
Periodically check the difference between the temperature of
the supply water and the condensation temperature. If the
difference is greater than 8 °C – 10 ° C it is advisable to clean
the exchanger.
The clearing must be effected :
•
With circulation opposite to the usual one
•
With a speed at least 1,5 times higher than the nominal one
•
With an appropriate product moderately acid (95% water +
5% phosphoric acid
•
After the cleaning rince with water to inhibe the detergent
rests.
8.7 ELECTRIC FANS
8.1 GENERAL
Maintenance must be done by authorized centres or by
qualified personnel
The maintenance enables:
•
maintain the unit efficiency
•
Reduce the deterioration speed to whom every equipment
is subject over time
•
Assemble information and data to understand the state of
the unit efficiency and avoid possible damages
8.6 WATER EXCHANGER
8.8 AIR COIL
Check :
•
the fans and the relative protection gridsare well fixed
•
The fan bearings (evident by noise and anomalous
vibrations )
•
the terminal protection covers are closed and the cable
holders are properly positioned
The inspections should be carried out at least every six months
The frequency, however, depends on the use .
In the event of frequent use it is recommended to plan
inspections at close intervals :
•
frequent use (continuous or very intermittent use, near the
operating limits, etc)
•
critical use (service necessary) .
8.2 INSPECTIONS FREQUENCY
8.3 MACHINE BOOKLET
It’s advisable to create a machine booklet to take notes of the
unit interventions.
In this way will be easier marker the various interventions and
will be e facilitate any troubleshooting.
Report on the booklet :
•
data
•
type of intervention effected
•
intervention description
•
Carried out measures etc ..
If a long period of inactivity is foreseen
•
Turn of the power in order to avoid electrical risks or
damages by lightning strike
•
avoid the risk of frosts (empty or add glycol in the plant
sections subjected to temperatures below zero , power
antifreeze resistances if are present )
It’s recommended that the starter after the period of detention
is made by a qualified technician, especially after seasonal
stops or seasonal switch.
When restarting, refer to the START-UP section .
Schedule technical assistance in advance to avoid hitches
and be able to use the installation when necessary.
8.4 PUT A REST
8.5 WATER FILTER
Verify that there are no impurities which hinder the smooth
passage of water.
8.9 CIRCULATION PUMPS
Verify :
•
no leaks
•
Bearing status (anomalies are highlighted by abnormal
noise and vibration)
•
The closing of the terminals cover and the correct
positioning of the cable glands.
