Midea MSMTAU-09HRFN8-QRD6GW, Руководство по обслуживанию

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2 Information servicing
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.
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.
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
work space 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
flammable atmospheres. Ensure that the
leak detection equipment being used is suitable
for use with flammable refrigerants, i.e. no
sparking, adequately sealed or intrinsically
safe.
5. Presence of fire extinguisher
If any hot work 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
CO2 fire extinguisher adjacent to the charging
area.
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 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.
7. Ventilated area
Ensure that the area is in the open or that it is
adequately ventilated before breaking into the
system or conducting any hot work. A degree of
ventilation shall continue during the period
that the work is carried out. The ventilation
should safely disperse any released refrigerant
and preferably expel it externally into the
atmosphere.
8. Checks to the refrigeration equipment
Where electrical components are being
changed, they shall be fit for the purpose and to
the correct specification. At all times the
manufacturer's maintenance and service
guidelines shall be followed. If in doubt consult
the manufacturer's technical department for
assistance. The following checks shall be
applied to installations using flammable
refrigerants:


the charge size is in accordance with the
room size within which the refrigerant
containing parts are installed;


the ventilation machinery and outlets are
operating adequately and are not obstructed;


if an indirect refrigerating circuit is being
used, the secondary circuit shall be checked
for the presence of refrigerant; marking to the
equipment continues to be visible and legible.


markings and signs that are illegible shall be
corrected;

refrigeration pipe or components are
installed in a position where they are unlikely to
be exposed to any substance which may
corrode refrigerant containing components,
unless the components are constructed of