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Page 29
Note on Pipe Length
Connection Instructions – Refrigerant Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take extra
care to cut and flare them properly. This will
ensure efficient operation and minimize the
need for future maintenance.
1. Measure the distance between the indoor
and outdoor units.
When connecting refrigerant piping,
do not
let substances or gases other than the specified
refrigerant enter the unit. The presence of other gases or substances will lower the unit’s capacity,
and can cause abnormally high pressure in the refrigeration cycle. This can cause explosion and
injury.
2. Using a pipe cutter, cut the pipe a little longer
than the measured distance.
3. Make sure that the pipe is cut at a perfect 90°
angle.
Oblique
Rough
Warped
90°
DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, dent, or
deform the pipe while cutting. This will
drastically reduce the heating efficiency
of the unit.
The length of refrigerant piping will affect the performance and energy efficiency of the unit. Nominal
efficiency is tested on units with a pipe length of 16.5ft
(In North America, the standard pipe length is 25’.
A minimum pipe run of
10'
is required to
minimize
vibration & excessive noise.
In special tropical area,
for the R290 refrigerant models, no refrigerant can be added and the maximum
length of refrigerant
pipe should not exceed 32.8ft.
Refer to the table below for specifications on the maximum length and drop height of piping.
Maximum Length and Drop Height of Refrigerant Piping per Unit Model
Model
Capacity (BTU/h)
Max. Length (
ft
)
Max. Drop Height (
ft
)
R410A,R32 Inverter Split Air
Conditioner
R22 Fixed-speed
Split Air Conditioner
R410A, R32 Fixed-speed
Split Air Conditioner
< 15,000
< 18,000
82ft
33ft
33ft
16ft
≥
15,000 and < 24,000
98.5ft
66ft
66ft
≥
24,000 and < 36,000
164ft
82ft
≥
21,000 and < 35,000
33ft
≥
18,000 and < 21,000
≥
18,000 and < 36,000
49ft
26ft
26ft
< 18,000
66ft
82ft
33ft
Refrigerant piping
Connection
Refrigerant Piping Connection