Gree GWH09ACC-K6DNA1F/I Service Manual page 44

Safety Precautions for Refrigerant
●To realize the function of the air conditioner unit, a special
refrigerant circulates in the system. The used refrigerant is
the fluoride R32,which is specially cleaned. The refrigerant
is flammable and inodorous. Furthermore, it can leads to
explosion under certain conditions. But the flammability of
the refrigerant is very low. It can be ignited only by fire.
●Compared to common refrigerants, R32 is a nonpolluting
refrigerant with no harm to the ozonosphere. The influence
upon the greenhouse effect is also lower. R32 has got very
good thermodynamic features which lead to a really high
energy efficiency. The units therefore need a less filling.
WARNING:
●Do not use means to accelerate the defrosting process or to
clean, other than those recommended by the manufacture.
Should repair be necessary,contact your nearest authorized
Service Centre. Any repairs carried out by unqualified
personnel may be dangerous. 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.
●Appliance shall be installed, operated and stored in a room
with a floor area larger than Xm
●Appliance filled with flammable gas R32. For repairs,
strictly follow manufacturers instructions only.Be aware that
refrigrants not contain odour.
●Read specialists manual.
Safety Operation of Flammable Refrigerant
Qualification requirement for installation and
maintenance man
●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
authorises their competence 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.
Installation notes
●The air conditioner is not allowed to use in a room that
Installation and Maintenance
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has running fire (such as fire source,working coal gas ware,
operating heater).
●It is not allowed to drill hole or burn the connection pipe.
●The air conditioner must be installed in a room that is larger
than the minimum room area.
The minimum room area is shown on the nameplate or
following table a.
●Leak test is a must after installation.
table a - Minimum room area ( m
Maintenance notes
●Check whether the maintenance area or the room area meet
the requirement of the nameplate.
— Its only allowed to be operated in the rooms that meet the
requirement of the nameplate.
●Check whether the maintenance area is well-ventilated.
— The continuous ventilation status should be kept during
the operation process.
●Check whether there is fire source or potential fire source in
the maintenance area.
— The naked flame is prohibited in the maintenance area;
and the "no smoking" warning board should be hanged.
●Check whether the appliance mark is in good condition.
— Replace the vague or damaged warning mark.
Welding
●If you should cut or weld the refrigerant system pipes in the
process of maintaining, please follow the steps as below:
a. Shut down the unit and cut power supply
b. Eliminate the refrigerant
c. Vacuuming
d. Clean it with N gas
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e. Cutting or welding
f. Carry back to the service spot for welding
●Make sure that there isnt any naked flame near the outlet of
the vacuum pump and its well-ventilated.
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