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Completely shut the cut-off valves of the outdoor unit (as ex-work status). After the refrigerant pipe
has been connected with both the indoor and outdoor unit, let the air exhaust out from the maintenance
gap on the low-pressure cut-off valves of the outdoor unit. Screw the nuts tightly on the maintenance
gap after the air has been discharged.
you should keep the cut-off valves of the outdoor unit completely opened after you have finished the
above steps (step1 or step 2)
,
Before screwing the reamer nut, wipe the pipe and it s surface with refrigerant oil;
After connecting, using soap-water or leakage-checker to make sure there is no leakage occurs;
Use two wrenches to connecting the pipes.
NOTE:
2. Using bronze pipe selling in market
3. To make the refrigerant pipe unblocked completely
Use thumb to curve the pipe
Min. Radius 100 mm
Untie the pipe,
make it straight
Torque wrench
Spanner
Outdoor unit
Indoor unit
The correct refrigerant charging amount to the 5-meter-long pipe of the outdoor unit is marked on the
Product Data Plate. If you have to use longer pipe for every meter plus pipe, the refrigerant should be
added according to the following calculation.
Connective
pipe length
Air purging
method Additional amount of refrigerant to be charged
4. Refrigerant charging
Less than
5m
Use vacuum
pump
More than
5m
Use vacuum
pump
Liquid side: 12.7
PIPE CONNECTION
Liquid side: 9.52 Liquid side: 6.35
R22:(Pipe length-5) X 30g/m R22:(Pipe length-5) X 60g/m
R410A:(Pipe length-5) X 30g/m
R410A:(Pipe length-5) X 60g/m
R22:(Pipe length-5) X 15g/m
R410A:(Pipe length-5) X 15g/m
NOTE:
If you are using a pipe purchased in the market, please make sure the heat-insulation
material is the same as what we supply(at least 12mm in thickness).
Check whether the height drop between
the indoor unit and outdoor unit,the length
of refrigerant pipe,and the max height
drop meet the following reqirements:
Model
R410A
inverter
split air
condtioner
Max. Length
of refrigerant
pipe(m)
Max. drop
height
(m)
Capacity
(Btu/h)
25 10
30 20
50
65
25
30
<15000
>15000~<24000
>24000~<36000
>36000~<60000
Pipe length
10


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