Refrigerant Piping Connection; Connection Instructions - Pioneer Inverter+ WAS Series Installation Manual

Refrigerant Piping Connection

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 of 5 meters (16 ft).
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
R410A Inverter Split Air
Conditioner
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.
Capacity (BTU/h)
< 15,000
 15,000 and < 24,000
 24,000 and < 36,000
 36,000 and  60,000
2. Using a pipe cutter, cut the pipe a little longer
3. Make sure that the pipe is cut at a perfect 90°
Max. Length (m) Max. Drop Height (m)
25 (80 ft)
30 (100 ft)
50 (165 ft)
65 (215 ft)
than the measured distance.
angle. Refer to Fig. 5.1 for bad cut examples.
90°
Oblique
Fig. 5.1
6
10 (33 ft)
20 (66 ft)
25 (82 ft)
30 (100 ft)
Rough Warped
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