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Note on Pipe Length:
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 in North America of 7.5 m
(25’).
A minimum pipe run of 3 meters (10 ft) is required to minimize vibration and
excessive noise.
Refer to the table below for specifications on the max length and drop height of piping.
Model
Capacity (Btu/hr)
Max Length
Max Height
ft
M
ft
m
R401A Inverter
Split Air
Conditioner
> 24,000 and < 35,000
164
50
82
25
> 36,000 and < 48,000
213
65
98
30
Step 1: Cut Tubing
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.
2. Using a tube cutter, cut the pipe a little longer than
the measured distance.
3. Make sure that the tube is cut at a perfect 90° angle.
Refer to Fig. 5.1 for bad cut examples.
Be extra careful not to damage, dent, or deform the tube
while cutting. This will drastically reduce the efficiency of
the unit.
Refrigerant Tubing Connection
Maximum Length and Drop Height of Refrigerant Piping per Unit Model
Connection Instructions
–
Refrigerant Tubing
DO NOT DEFORM
TUBE WHILE CUTTING
