FLAMMABLE GASES
e-BALTIC-IOM-2020.12-EN
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POWERING UP A UNIT CONTAINING FLAMMABLE GAS
Before switching on the power supply, please carry out a refrigerant leak detection using an appropriate device to ensure that
there is no refrigerant around the machine.
ELECTRIC WIRING ON A UNIT CONTAINING FLAMMABLE GAS
When a cable passes through a wall, be sure to use a cable gland to ensure that the cable is sealed and insulated. This insulation
prevents any electric arcs that could ignite the refrigerant if leaked.
INTERVENTION ON A UNIT CONTAINING FLAMMABLE GAS
Before any intervention on a machine with A2L / A2 / A3 flammable fluid, carry out a leak detection using an appropriate device
to ensure that there is no refrigerant around the machine.
When working on a machine with flammable fluid A2L/A2/A3, do not cause sources of flammability in the area near the rooftop
(see above). For example: do not smoke, make phone calls, do not use walkie-talkies.
CORRECTIVE MAINTENANCE ON R32 GAS UNIT:
The following precautions, specific to this gas, must be taken when using the R32 refrigerant:
•
The vacuum pump must be fitted with a non-return valve or a solenoid valve and comply with R32 (A2L).
•
Pressure gauges and pipes suitable for refrigerant R32 must be used.
•
Use only pipe cutters and no torches to open the pipes.
•
The load must be applied in the liquid phase.
•
Always use a scale to charge the refrigerant.
•
Use the leak detector suitable for R32 refrigerant.
•
Do not use mineral oil, only synthetic oil for boring, expanding or making connections.
•
Keep the pipes closed before using them and pay close attention to any traces of humidity and dirt (dust, filings,
burrs, etc.).
•
Brazing must always be carried out in a nitrogen atmosphere.
•
The drill bits must always be sharp.
•
The refrigerant bottle must contain at least 2% of the total amount.
WARNING
Care must be taken to remove refrigerant from the system before cutting or unbrazing any piping with a tool suitable for
use with R32 (A2L).
We recommend the following protocol before any piping work:
•
Drain the unit with the appropriate drain device for R32 (A2L).
•
Charge the unit with dry nitrogen to allow any remaining R32 in the oil to be removed.
•
Repeat these operations twice
•
Release the pressure in a recovery cylinder and in accordance with the F-gas directive (R32 is an HFC listed in annex
1 of the F-gas directive).
