Qlima PES 7125 Operating Manual page 57

Maintenance and repairs that require the assis-
tance of other qualified personnel must be per-
formed under the supervision of an individual
specified in the use of flammable refrigerants.
Appliances shall be installed,operated and stored
in a room with a floor area larger than 4 m
appliance shall be stored in a well-ventilated area
where the room size corresponds to the room area
as specified for operation.
INSTRUCTIONS FOR REPAIRING APPLIANCES CONTAINING
R290 / R32
1 GENERAL INSTRUCTIONS
This instruction manual is intended for use by individuals possessing adequate
backgrounds of electrical, electronic, refrigerant and mechanical experience.
1.1 Checks to the area
Prior to beginning work on systems containing flammable refrigerants, safety
checks are necessary to ensure that the risk of ignition is minimised. For repair to
the refrigerating system, the following precautions shall be complied with prior
to conducting work on the system.
1.2 Work procedure
Work shall be undertaken under a controlled procedure so as to minimise the risk
of a flammable gas or vapour being present while the work is being performed.
1.3 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.
1.4 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 flammable
atmospheres. Ensure that the leak detection equipment being used is suitable
for use with flammable refrigerants, i.e. nonsparking, adequately sealed or
intrinsically safe.
1.5 Presence of fire extinguisher
lf any hotwork is to be conducted on the refrigeration equipment or any
associated parts, appropriate fire extinguishing equipment shall be available to
hand. Have a dry powder or CO 2 fire extinguisher adjacent to the charging area.
1.6 No ignition sources
No person carrying out work in relation to a refrigeration system which involves
exposing any pipe work that contains or has contained flammable refrigerant
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, including cigarette smoking, should
be kept sufficiently far away from the site of installation, repairing, removing
and disposal, during which flammable refrigerant can possibly be released to
thesurrounding space. Prior to worktaking 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.
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