Refrigerant Piping Connection
Note on Pipe Length
The length of refrigerant piping will aect the performance and energy efﬁciency of the unit. Nominal
efﬁciency is tested on units with a pipe length of 16.5 ft (5 m).
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 Inverter Split Air
< 15,000 82 ft (25 m) 33 ft (10 m)
≥ 15,000 and < 24,000 98.5 ft (30 m) 66 ft (20 m)
≥ 24,000 and < 36,000 164 ft (50 m) 82 ft (25 m)
≥ 36,000 and ≤ 60,000 213 ft (65 m) 98.5 ft (30 m)
Connection Instructions –
Step 1: Cut pipe
When preparing refrigerant pipes, take extra care
to cut and ﬂare them properly. This will ensure
efﬁcient operation and minimize the need for
1. Measure the distance between the indoor and
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. Refer to Fig. 5.1 for bad cut examples.
Oblique Rough Warped