LG KCHH Series Installation Manual page 10

SAFETY PRECAUTIONS
WARNING
R32 Refrigerant Safety
Do not use means to accelerate the defrosting process. Only
use means that are recommended by the manufacturer.
The chiller shall be stored in a well-venilated area, where the
size of the storage area per chiller is compliant with local fire
and safety codes.
The chiller shall be stored in a room without continuously
operating open flames (for example an operating gas chiller)
and ignition sources (for example an operating electric heat-
er).
Do not pierce or burn.
Be aware that refrigerants may not contain an odor.
Keep any required ventilation openings clear of obstruction.
The chiller shall be stored so as to prevent mechanical dam-
age from occurring.
The manufacturer should specify other potential continuous-
ly operating sources known to cause ignition of the refriger-
ant used.
Compliance with national gas regulations shall be observed.
Refrigerant tubing shall be protected or enclosed to avoid
damage.
A brazed, welded, or mechanical connection shall be made
before opening the valves to permit refrigerant to flow be-
tween refrigeration system parts.
Any person who is involved with working on or breaking into
a refrigerant circuit should hold a current valid certificate
from an industry-accredited assessment authority, which au-
thorizes the agent to handle refrigerants safely in accordance
with an industry recognised assessment specification.
Servicing shall only be performed as recommended by the
equipment manufacturer. Maintenance and repair requiring
the assistance of other skilled personnel shall be carried out
under the supervision of the person competent in the use of
flammable refrigerants.
The removal and disposal of refrigerant oil and associated
parts shall be in accordance with local and national stan-
dards.
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 mini-
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mised. For repair to the refrigerating system, the following precautions
shall be complied with prior to conducting work on the system.
Work procedure
Work shall be undertaken under a controlled procedure so as to mini-
mise the risk of a flammable gas or vapour being present while the work
is being performed.
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.
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 flam-
mable atmospheres. Ensure that the leak detection equipment being
used is suitable for use with flammable refrigerants, i.e. nonsparking,
adequately sealed or intrinsically safe.
Presence of fire extinguisher
If any hot work is to be conducted on the refrigerating 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.
No ignition sources
No person carrying out work in relation to a refrigerating system which
involves exposing any pipe work that contains or has contained flamma-
ble 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, shall 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.
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 actual refrigerant charge 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.