Gree GWC12ATCXB-K6DNA1B - Page 37

34
Installation and Maintenance
Service Manual
table a - Minimum room area ( m
2
)
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 re source or potential re 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
2
gas
e. Cutting or welding
f. Carry back to the service spot for welding
● Make sure that there isnt any naked ame near the outlet of
the vacuum pump and its well-ventilated.
● 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
lling refrigerant.
● Stick the label on the system after lling is nished (or havent
nished).
● Dont overlling.
● After lling is nished, 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 ammable gas detector to check before unload
and open the container.
●No re source and smoking.
●According to the local rules and laws.
Specialist’s Manual
●
The following checks shall be applied to installations using
ammable 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;
- refrigerating 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.
● 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:
- that capacitors are discharged: this shall be done in a safe
manner to avoid possibility of sparking;
- that capacitors are discharged: this shall be done that no live
electrical components and wiring are exposed while charging,
recovering or purging the system;
- that there is continuity of earth bonding.
● 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,
DD.4.3 to DD.4.7 shall be completed 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 ammable 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
conned spaces shall be avoided.
● Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant