FILLING R32 REFRIGERANT GAS
These procedures can only be performed by specialized
technicians or qualified personnel.
ATTENTION:
In case of unit without refrigerant charge or with interrupted
charge, immediately stop compressor operation and turn off
the unit.
• Make sure that other types of refrigerant do not contaminate
R32.
• The gas cylinder must be kept in a vertical position at the time
of loading.
• Apply the appropriate label on the unit after loading.
• Do not charge more refrigerant gas than necessary.
• Once the charging is complete, perform the leak detection
operations before the test run.
• A second gas leak detection check should be done once all
previous operations have been completed.
REFRIGERANT GAS LEAK DETECTION TEST
• The installation area of the unit should be checked with an
appropriate refrigerant detector before and during work,
to ensure that the technician who is working is aware of
potentially flammable atmospheres.
• Do not use halogen probes when detecting possible refrigerant
leaks or other probes or detectors that use open flames.
• Do not use your hands to check for refrigerant leaks.
• Accidental expulsion of refrigerant can cause lack of oxygen
and therefore the risk of asphyxiation: install the machinery
in a suitably ventilated environment in accordance with EN
378-3 and local regulations in force. Anyone approaching the
machine must be equipped with a properly calibrated and
approved leak detector to detect any leaks in the refrigerant
used.
• To carry out procedures for detecting possible refrigerant leaks
it is necessary to use electronic measuring instruments such as
the (leak detector). CAUTION: Sensitivity may not be adequate
and / or the measuring instrument may require recalibration.
(The electronic measuring instrument must be calibrated in a
refrigerant-free area).
• Pay attention that the leak detector used does not become a
possible source of ignition.
• The leak detector must be calibrated to detect the minimum
percentage of dispersed refrigerant (no more than 25%).
• The fluid used for the detection of possible gas leaks from the
pipes must not contain chloride solvents to prevent possible
chemical reactions and corrosion of the copper pipes.
• If a refrigerant leak is suspected, extinguish or remove all open
flames.
• In order to avoid an environmental risk, ensure that any fluid
leaks are recovered in suitable devices in compliance with local
regulations.
• If a refrigerant leak is detected that requires brazing, all
refrigerant must be recovered from the system and isolated
(via shut-off valves) in a part of the system remote from the
leak.
• Oxygen-free nitrogen (OFN) must therefore be purged through
the system both before and during the brazing process.
DISPOSAL OF R32 GAS
These procedures can only be performed by specialized
technicians or qualified personnel.
Do not discharge in areas that present a risk of the formation of
explosive mixtures with air.
Contact the supplier if instructions for use are deemed necessary.
SAFETY RULES FOR THE TRANSPORT AND STORAGE OF R32
GAS
• Using a special gas detector, check that there are no gas leaks
in the environment before opening the unit packaging.
• Check that there are no ignition sources near the unit.
• Smoking is prohibited near the unit.
• Transport and storage must be carried out in accordance with
the national regulations in force.
• Improper transportation can cause damage to the unit, even
causing refrigerant to leak. Before the first start-up, a leakage
test must be carried out and, if necessary, any necessary repairs
must be carried out.
• Always check that the refrigerant gas charge contained in the
unit is adequate for its storage location.
QUALIFICATION REQUIREMENTS FOR INSTALLATION AND
MAINTENANCE
ATTENTION: this unit must be installed outdoors: (installation
according to class III, EN 378-1; 2016). As this unit is intended
exclusively for outdoor installation and in an area with
authorized access, there are no refrigerant charge limits in
accordance with EN378 Table C.2.
• All operators who are committed to working in the refrigeration
circuit must have obtained the certificate to be able to work
with these gases. This certificate is issued by the authoritative
organization and must be recognized by the company or
body where these interventions are carried out. Otherwise
the operating technician must be supervised by a third person
who is in possession of this certification.
• Check that the maintenance area is well ventilated. The state of
good ventilation must be maintained for the entire duration of
the intervention.
• The unit can only be repaired with the method suggested by
the manufacturer.
• The unit is equipped with overpressure release devices
(safety valves): if these devices intervene, the refrigerant
gas is released at a high temperature and speed.
• Prevent the projection of the gas from damaging people or
things.
• Install the unit far enough away from the drain pits.
WARNINGS DURING WELDING INTERVENTIONS
The intervention must be carried out by specialized
technicians or by qualified personnel.
If it is necessary to cut or weld the piping of the refrigerant
system, please operate by following the points below:
• Turn off the unit and remove the power.
• Discharge the refrigerant gas.
• Aspirate the remaining gas.
• Clean with N2 gas.
• Perform the necessary cutting or welding operation.
• At the end of the intervention, restore the unit and the
refrigerant circuit as it was before the brazing and / or welding
operations.
• Make sure that there is no naked flames near the suction pump
outlet, and that it is well ventilated.
• Carry out brazing or welding only on empty pipes that are free
of any residual lubricating oil; do not bring flames or other heat
sources close to pipes containing refrigerant fluid.
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