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When the cable is not fasten enough, use the buckle to prop it up , so it can be clamped tightly.
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REFRIGERANT PIPING CONNECTION
When connecting refrigerant piping, do not let substances or gases other than the specified refrigerant
enter the unit. The presence of other gases or substances will lower the unit’s capacity, and can cause
abnormally high pressure in the refrigeration cycle. This can cause explosion and injury.
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)( In North America, the standard pipe
length is 7.5m (25’)). A minimum pipe run of 3 metres is required to minimise vibration & excessive noise.
In special tropical area, for the R290 refrigerant models, no refrigerant can be added and the maximum
length of refrigerant pipe should not exceed 10 meters(32.8ft).
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,R32 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)
R22 Fixed-speed
Split Air Conditioner
< 18,000
10 (33ft)
5 (16ft)
≥ 18,000 and < 21,000
15 (49ft)
8 (26ft)
≥ 21,000 and < 35,000
20 (66ft)
10 (33ft)
R410A, R32 Fixed-speed
Split Air Conditioner
< 18,000
20 (66ft)
8 (26ft)
≥ 18,000 and < 36,000
25 (82ft)
10 (33ft)
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.
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.
Buckle
Three sizes hole: Small, Large, Medium
Oblique
Rough
Warped
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