Unscheduled Maintenance - Mitsubishi Electric Climaveneta i-BX-004-013M Installation, Operation And Service Manual

UNSCHEDULED MAINTENANCE

Never perform any cleaning operations before having
disconnected the unit from the mains power supply.
Make sure power is not connected before proceeding.
CHEMICAL WASHING
It is recommended to chemically flush the plate heat
exchanger after every 3 years of operation.
For instructions on how to carry out this operation, call a
specialized technician.
REFRIGERANT GAS CHARGE
The chillers are filled with R410A refrigerant gas and tested
in the factory.
In normal conditions, there should be no need for the Tech-
nical Service to intervene to check the refrigerant gas.
However, over time, small leaks may develop at the joints
leading to loss of refrigerant and draining of the circuit,
causing the unit to function poorly.
In this case, the leaks of refrigerant must be identified and
repaired and the refrigerant circuit recharged.
Proceed as follows:
- Empty and dry the entire refrigerant circuit using a vacuum
pump connected to the low and high pressure tap until the
vacuometer reads about 10 Pa.
Wait a couple of minutes and check that this value does
not rise to more than 50 Pa.
- Connect the refrigerant gas cylinder or a filling cylinder to
the low pressure line pressure gauge connection
DECOMMISSIONING AND DISPOSAL OF MACHINE COMPONENTS
The WEEE 2012/19/EU directive prohibits
the disposal with mixed city waste of elec-
tric and electronic equipment found the unit.
The following symbol indicates that such
equipment must be handled implementing
sorted collection procedures.
76 i-BX-(Y)_i-BX-N-(Y) EN
- Charge the quantity of refrigerant indicated on the unit's
rating plate.
- Always check the superheating and subcooling values,
which should be between 5 and 10°C and 4 and 8°C.
- After a couple of hours operation, check that the liquid
indicator indicates a dry circuit (dry-green).
In the event of partial leaks, the circuit must be com-
pletely emptied before being recharged.
The R410A refrigerant must only be charged in the liq-
uid state.
Operating conditions other than rated conditions may
produce considerably different values.
Tightness testing or identification of leaks must only be
carried out using R410A refrigerant gas, checking with a
suitable leak detector.
The refrigerant circuit must not be charged with a
refrigerant other than that indicated on the rating plate
and in this manual.
The use of a different refrigerant may cause serious
damage to the compressor.
Oxygen, acetylene or other flammable or poisonous gas-
es must never be used in the refrigerant circuit as they
may cause explosion or poisoning.
Oils other than those indicated must not be used.
The use of different oil may cause serious damage to the
compressor.
The correct disposal of electric and electronic equipment
helps to reduce the risk of harmful effects for human health
and the environment.
The buyer, whose role is of fundamental importance in con-
tributing to the reuse, recovery and recycling of such equip-
ment, is invited to request the necessary information for dis-
posal to the local authorities, to the manager of the waste
disposal service, the distributor, or the manufacturer.
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