Aiwa ACD-24KBTU Gebrauchsanweisung, Installationsanleitung Seite 14

up-to-date certificate from an assessment authority
accredited by the industry and recognizing their
competence to handle refrigerants, in accordance
with the assessment specification recognized in
the industrial sector concerned. Service operations
should only be carried out in accordance with the
recommendations of the equipment manufacturer.
Maintenance and repair operations that require
the assistance of other qualified persons must be
conducted under the supervision of the person
competent for the use of flammable refrigerants.
14. Every working procedure that affects safety means
shall only be carried out by competent persons.
Caution: Risk of fire
16. Information on 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 minimized. 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 minimize the risk of
a flammable gas or vapor 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 flammable
atmospheres. Ensure that the leak detection
equipment being used is suitable for use with
flammable refrigerants, i.e. non-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 CO 2 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 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 refrigerant can possibly be released to
the surrounding space. Prior to work taking place,
the area around the equipment is to be surveyed to
14 ACD-24KBTU
15. Warning:
* Do not use means to accelerate the defrosting
process or to clean, other than those
recommended by the manufacturer.
* The appliance shall be stored in a room without
continuously operating ignition sources (for
example: open flames, an operating gas
appliance or an operating electric heater).
* Do not pierce or burn.
* Be aware that refrigerants may not contain an
odor.
Operating instructions
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 materials which
are inherently resistant to being corroded or are
suitably protected against being so corroded.
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