Vessen VRXN25BV1B, Installation Manual, Page: 126 / 135

 Page 25 
Refrigerant Piping Connection
6
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)
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. Refer to Fig. 5.1 for bad cut examples.
Oblique Rough Warped
90°
Fig. 5.1
Refrigerant
Piping
Connection