Refrigerant Piping Connection; Note On Pipe Length; Connection Instructions -Refrigerant Piping; Cut Pipe - Rinnai HSNRA26 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 (16.5ft).
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
HONRA26 / HONRA35
HONRA50
HONRA70 / HONRA80
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 (kW)
< 4.4
≥ 4.4 and < 7.0
≥ 7.0 and < 10.5
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. 6.1 for bad cut examples.
Max. Length (m) Max. Drop Height (m)
25
30
50
90°
Oblique Rough
Fig. 6.1
6
10
20
25
Warped
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