Gree GWH09ACC-K6DNA1F/I Service Manual page 45

●The refrigerant should be recycled into the specialized
storage tank.
Filling the refrigerant
●Use the refrigerant filling appliances specialized for R32.
Make sure that different kinds of refrigerant wont contaminate
with each other.
●The refrigerant tank should be kept upright at the time of
filling refrigerant.
●Stick the label on the system after filling is finished (or
havent finished).
●Dont overfilling.
●After filling is finished, please do the leakage detection
before test running; another time of leak detection should be
done when its removed.
Safety instructions for transportation and storage
●Please use the flammable gas detector to check before
unload and open the container.
●No fire source and smoking.
●According to the local rules and laws.
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.
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.
●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
●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 toxic or flammable atmospheres.
Ensure that the leak detection equipment being used is suitable for
use with all applicable refrigerants, i.e. non-sparking, adequately
sealed or intrinsically safe.
●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
extinguisher adjacent to the charging area.
●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
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surveyed to make sure that there are no flammable hazards or
ignition risks. " NO Smoking " signs shall be displayed.
●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.
●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;
---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.
●Checks to electrical devices
Repair and maintenance to electrical components shall include
initial safety checks and component inspection procedures. If a
fault exists that could compromise safety, then no electrical supply
shall be connected to the circuit until it is satisfactorily dealt with.
If the fault cannot be corrected immediately but it is necessary to
continue operation, an adequate temporary solution shall be used.
This shall be reported to the owner of the equipment so all parties
are advised.
Initial safety checks shall include:
1.That capacitors are discharged: this shall be done in a safe
manner to avoid possibility of sparking;
2.That no live electrical components and wiring are exposed while
charging, recovering or purging the system;
3.That there is continuity of earth bonding.
fire
2
●Repairs to sealed components
1. During repairs to sealed components, all electrical supplies shall
be disconnected from the equipment being worked upon prior to
any removal of sealed covers, etc. If it is absolutely necessary to
have an electrical supply to equipment during servicing, then a
permanently operating form of leak detection shall be located at
the most critical point to warn of a potentially hazardous situation.
2. Particular attention shall be paid to the following to ensure that
by working on electrical components, the casing is not altered
in such a way that the level of protection is affected.This shall
include damage to cables, excessive number of connections,
Installation and Maintenance