3
.1
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 (16.5ft).
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 (m)
Max. drop height (m)
R410A inverter split air
conditioner
< 15,000
25 (82ft)
10 (33ft)
≥ 15,000 and < 24,000
30 (98.5ft)
20 (66ft)
≥ 24,000 and < 36,000
50 (164ft)
25 (82ft)
≥ 36,000 and ≤ 60,000
65 (213ft)
30 (98.5ft)
3
.2
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.
For R32/R290 refrigerant
models, the pipe connection points must be placed outside of room.
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. Make sure that the pipe is cut at a perfect 90° angle. Refer to Fig.
3
.1 for bad cut examples.
3.
Refrigerant piping connection
Split-type room air conditioner / Installation Manual
56 / 120 EN
