Precautions For Handling Equipment Using R32 - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

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Precautions for handling equipment using R32

When handling the units that use R32 refrigerant, observe the following notes. (The notes are based on the precautions re-
garding R32 refrigerant contained in IEC 60335-2-40.)
1. Transportation
1) Additional transportation regulations may exist with respect to equipment containing slightly flammable gas. The maximum
number of pieces of equipment or the configuration of the equipment, permitted to be transported together will be determined
by the applicable transport regulations.
2. Disposal
1) Follow the local regulations on proper disposal of equipment using R32.
3. Storage
1) Store the unit in a sufficiently large space so that leaked refrigerant will not stagnate in a small confined area.
2) The maximum number of pieces of equipment permitted to be stored together will be determined local regulations.
4. Servicing information
1) Checks to the area
Prior to beginning work on systems containing slightly flammable refrigerants, safety checks are necessary to ensure that the
risk of ignition is minimised. For repair to the refrigerating system, 3) to 7) shall be completed prior to conducting work on the
system.
2) Work procedure
Work shall be undertaken under a controlled procedure so as to minimise the risk of a slightly flammable gas being present
while the work is being performed.
3) General work area
All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out. Work in
confined spaces shall be avoided. The area around the workspace shall be sectioned off. Ensure that the conditions within
the area have been made safe by control of flammable material.
4) Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware
of potentially slightly flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with all
applicable refrigerants.
5) Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equip-
ment shall be available to hand. Have a dry powder or CO
6) No ignition sources
No person carrying out work, such as brazing, in relation to a refrigeration system which involves exposing any pipe work shall
use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, in-
cluding cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal,
during which refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around the
equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. ''No Smoking'' signs shall be
displayed in a conspicuous place in the work area.
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fire extinguisher adjacent to the charging area.
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