Safety of Construction
Safety operation of flammable refrigerant
Welding
kept during the operation process.
a.
b.
c.
d.
e.
Cutting or welding
f. Carry back to the service spot for welding
that meet the requirement of the nameplate.
Check whether the maintenance area is well-
ventilated.
- The continuous ventilation status should be
table a - Minimum room area ( m
2
)
If you should cut or weld the refrigerant system
pipes in the process of maintaining, please foll-
ow the steps as below:
Filling the refrigerant
Shut down the unit and cut power supply
Eliminate the refrigerant
Vacuuming
Clean it with N
2 gas
The refrigerant should be recycled into the sp-
ecialized storage tank.
Make sure that there isn’t any naked flame ne-
ar the outlet of the vacuum pump and it’s well-
ventilated.
Safety instructions
for transportation and storage
Please use the flammable gas detector to ch-
eck before unload and open the container.
No fire source and smoking.
According to the local rules and laws.
board should be hanged.
Check whether the appliance mark is in good
condition.
- Replace the vague or damaged warning mark.
Check whether the maintenance area or the ro-
om area meet the requirement of the nameplate.
- It’s only allowed to be operated in the rooms
After filling is finished, please do the leakage
detection before test running; another time of
leak detection should be done when it’s removed.
Check whether there is fire source or potential
fire source in the maintenance area.
- The naked flame is prohibited in the mainte-
nance area; and the “no smoking” warning
For appliances using FLAMMABLE REFRIG-
ERANTS, all joints made in the installation
between parts of the REFRIGERATING
SYSTEM, with at least one part charged, shall
be made in accordance with the following:
– A brazed, welded, or mechanical connection
shall be made before opening the valves to
permit refrigerant to flow between the
REFRIGERATING SYSTEM parts. A vacuum
valv
e shall be provided to evacuate the inter-
connecting pipe or any uncharged REFRIG-
ERATING SYSTEM part.
Use the refrigerant filling appliances specia-
lized for R32. Make sure that different kinds
of refrigerant won’t 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 fin-
ished (or haven’t finished).
Don’t overfilling.
Maintenance notes
Based on UL 60335-2-40 requirements
The following installation height and area for
customer reference.
1.8
2.2
2.5
3
1.836~2.7
9.8
8.1
7.1 5.9
<1.836 /
/
/ /
2.8
10.2
8.4
7.4 6.2
2.9
10.6
8.7 7.6 6.4
Charge
amount
Installation height(m)
Minimum room area (m )
2
(kg)
–
enclosed to avoid damage.
–
Refrigerant tubing shall be protected or
Flexible refrigerant connectors (such as con-
– Mechanical connectors used indoors shall
comply with ISO 14903. When mechanical
connectors are reused indoors, sealing parts
shall be renewed. When flared joints are
reused indoors, the flare part shall be refabri-
cated.
necting lines between the indoor and outdoor
unit) that may be displaced during NORMAL
OPERATION shall be protected against
mechanical damage.
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