82
Installation and Maintenance
Service Manual
table a - Minimum room area ( m
2
)
Charge
amount
(kg)
Floor
location
Window
mounted
Wall
mounted
Ceiling
mounted
≤1.2 4 4 4 4
1.3 14.5 5.2 4 4
1.4 16.8 6.1 4 4
1.5 19.3 7 4 4
1.6 22 7.9 4 4
1.7 24.8 8.9 4 4
1.8 27.8 10 4 4
1.9 31 11.2 4 4
2 34.3 12.4 4 4
2.1 37.8 13.6 4.2 4
2.2 41.5 15 4.6 4
2.3 45.4 16.3 5 4
2.4 49.4 17.8 5.5 4
2.5 53.6 19.3 6 4
3. Maintenance notes
● Check whether the maintenance area or the room area meet
the requirement of the nameplate.
— It's 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.
4. 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.
5. 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 filling is finished (or
havent nished).
● Don't overlling.
● After filling is finished, please do the leakage detection
before test running; another time of leak detection should be
done when its removed.
6. Safety instructions for transportation and
storage
● Please use the flammable 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
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