13 - STANDARD MAINTENANCE
To ensure optimal efficiency and reliability of the equipment and
all its functions, we recommend taking out a maintenance
contract with the local organisation set up by your manufacturer.
This contract will include regular inspections by the manufacturer’s
Service specialists so that any malfunction is detected and
corrected quickly, ensuring that no serious damage can occur.
The manufacturer's service maintenance contract is the best
way to ensure the maximum operating life for your equipment
and, through the expertise of manufacturer's qualified personnel,
provides the ideal way to manage your system energy
consumption effectively.
The refrigeration equipment must be serviced by professionals;
however, routine checks may be carried out locally by specially-
trained technicians. See the standard EN 378-4.
All refrigerant charging, removal and recovery operations must
be carried out by a qualified technician and with the correct
equipment for the unit. Any inappropriate handling can lead to
uncontrolled fluid or pressure leaks.
IMPORTANT: Before performing any work on the machine
ensure it is deenergized. If a refrigerant circuit is opened, it
must be evacuated, recharged and tested for leaks. Before
any operation on a refrigerant circuit, it is necessary to
evacuate the refrigerant charge from the device using a
charge transfer unit.
Simple preventive maintenance will allow you to get the best
performance from your HVAC unit:
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Optimisation of energy performance,
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Reduced electricity consumption,
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Prevention of accidental component failure
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Prevention of major time-consuming and costly work,
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Protection of the environment.
There are five maintenance levels for HVAC units, as defined by
the AFNOR X60-010 standard.
NOTE: Any deviation from or failure to comply with
these maintenance criteria will render the guarantee
conditions for the refrigeration unit null and void,
and will release the manufacturer from its liability.
13.1 - Level 1 maintenance
These simple procedures can be carried out by the user:
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Visual inspection for traces of oil (indicates a refrigerant leak),
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Check for leaks in the hydraulic circuit (monthly),
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Clean the air-cooled exchangers (see the dedicated chapter),
-
Check that the protective grilles are present and in good
condition, and that the doors and covers are properly closed,
-
Check the unit's alarm report (see the control manual),
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Verify the refrigerant charge in the liquid line sight glass,
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Verify the chilled water temperature difference at the heat
exchanger outlet is correct,
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Check for any general signs of deterioration,
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Check the anti-corrosion coatings.
13.2 - Level 2 maintenance
This level requires specific expertise in electrical, hydraulic and
mechanical systems. it is possible that this expertise may be
available locally; there may be a maintenance service, industrial
site or specialist subcontractor in the area.
The frequency of this maintenance may be monthly or annual,
depending on the type of check.
In these cases, the following maintenance operations are
recommended:
Carry out all level 1 operations, then:
Electrical checks (annual checks):
-
At least once a year tighten the electrical connections for the
power supply circuits (see tightening torques table),
-
Check and tighten all control connections, if required,
-
Check the labelling of the system and instruments, re-apply
the missing labels if required,
-
Remove the dust and clean the interior of the electrical boxes.
Be careful not to blow dust or debris into components; use a
brush and vacuum wherever possible,
-
Clean the insulators and bus bar supports (dust combined
with moisture reduces the insulation gaps and increases
current leakage between phases and from phase to ground),
-
Check the presence, condition and operation of electrical
protective devices,
-
Check the presence, condition and operation of control
components,
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Check that all heaters are operating correctly,
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Replace the fuses every 3 years or every 15000 hours
(ageing),
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Check that no water has penetrated into the electrical box,
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On the electrical box and for units equipped with an inverter,
regularly check the cleanliness of the filter media to maintain the
correct air flow.
-
Check that the capacitor is operating correctly (Power factor
correction option).
Mechanical:
-
Check that the mounting bolts for the ventilation sub-
assemblies, fans, compressors and electrics box are securely
tightened
AQUACIAT
POWER
ILD
EN-64
