Maintenance; Maintenance Operations - omi CHW 09 Manual De Uso Y Mantenimiento

710.1760.00.01-00
To ensure that the chiller operates properly and is suitably located, adhere to the safety pre-
cautions described in the relevant sections!
Never open the cooling medium circuit, which is closed to the atmosphere, (compressor,
evaporator and condenser) if there may be any refrigerant or lubricating oil present.
7.

MAINTENANCE

7.1

MAINTENANCE OPERATIONS

All maintenance work may only be carried out by specialist personnel!
Isolate the chiller from the electricity mains before you carry out any work!
Exercise due caution when cleaning with compressed air and use the recommended personal
protective devices to avoid any damage to your eyes!
Never use any liquid substances to clean the finned pack. If necessary, contact an authorized
service centre to have the cleaning carried out!
Obligatory maintenance
Every 6 months:
In compliance with the Regulation CE/842/2006, refrigeration equipment that contains more than 30 kg
of refrigerant has to be inspected every six months in order to prevent any occurrence of leakages. This
inspection has to be documented in the daily records (see Section 7.2).
Every year:
In compliance with the Regulation CE/842/2006, refrigeration equipment that contains more than 3 kg of
refrigerant has to be inspected annually in order to prevent any occurrence of leakages. This inspection
has to be documented in the daily records (see Section 7.2).
Ordinary maintenance operations
Ordinary maintenance work does not involve any access to internal machine parts. Do not remove, even
partially, any covers of the machine parts for this purpose.
Weekly:
1) Check from the outside whether the level of cooling medium in the tank is within the limits that
can be seen on the display on the side of the chiller.
2) Check whether the cooling medium temperature matches the required temperature.
Monthly:
1) Check the finned pack of the condenser from outside. If there are any deposits, clean them using
a compressed air jet with a pressure of not more than 3 bar.
2) Make sure that the compressor is not producing any unusual vibrations.
3) Check the cleanliness of the filter and clean it if necessary.
Every 4-6 months:
1) Check whether the current consumption of the compressor group is within the target values indi-
cated in these instructions.
Clean the fin pack of the condenser using a compressed air jet with a pressure of not more than 3
2)
bar in order to remove all deposits that might impair its efficiency. The frequency of cleaning de-
pends on the quality of the ambient air; in any case we suggest that you clean the condenser at
the beginning of the summer. if necessary, straighten any bent aluminium fins.
3) Check the quality of the cooling medium.
Change the glycol mixture according to the chiller application (see glycol safety sheet).
To change the mixture, undo the level indicator and empty the tank through the discharge tube.
If you have any further queries arise concerning products, applications and any problems that arise,
please contact the manufacturer of an authorized Technical Service Centre.
To guarantee the efficiency and safety of the chiller, you should always order and use only original spare
parts.
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22/07/2009