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Refrigerant Piping Connection
7
NOTE ON PIPE LENGTH
Model
R410A Inverter Split
Air Conditioner
< 15,000 82 ft (25 m) 33 ft (10 m)
≥ 15,000 and < 24,000 66 ft (20 m)
≥ 24,000 and < 36,000 82 ft (25 m)
≥ 36,000 and ≤ 60,000 98.5 ft (30 m)
Preparation Instructions –
Cut & Flare Refrigerant Piping
Oblique Rough Warped
Fig. 7.1
90°
The length of the refrigerant piping will affect the performance and energy efficiency of the unit.
The following guidelines should be noted regarding pipe length:
• Nominal efficiency is tested on units with a pipe length of 16.5 ft (5 m).
• In North America, the standard pipe length is 25 ft (7.5 m).
• A minimum pipe run of 9.8 ft (3 m) is required to minimize vibration & excessive noise
Refer to the table below for specifications on maximum length & drop height of piping.
Maximum Length & Drop Height of Refrigerant Piping per Unit Model
Capacity
(BTU/h)
Max. Length
ft (m)
Max. Drop Height
ft (m)
98.5 ft (30 m)
164 ft (50 m)
213 ft (65 m)
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.
2. Using a pipe cutter, cut the pipe a little longer than
the measured distance.
3. Ensure the pipe is cut at a perfect 90° angle. Refer
to Fig. 7.1 for correct and incorrect examples.
When connecting refrigerant piping, DO NOT allow any foreign substances or gases enter the
refrigeration system. The presence of foreign gases or substances will lower the unit’s capacity,
and can cause abnormally high pressure in the refrigeration cycle. This could result in an
explosion and/or personal injury.
WARNING
DO NOT Deform the pipes while cutting
them. Use care to not damage, dent, or,
deform the pipe while cutting. This will
drastically reduce the heating & cooling
efficiency of the unit.
CAUTION
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