Refrigerant Piping Connection; Note On Pipe Length; Connection Instructions - Refrigerant Piping - Rinnai HINRP26MB Installation Manual

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,

Refrigerant Piping Connection

and can cause abnormally high pressure in the refrigeration cycle. This can cause explosion and
injury.
When connecting refrigerant piping, do not let substances or gases other than the specified

Note on Pipe Length

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
The length of refrigerant piping will affect the performance and energy efficiency of the unit. Nominal
injury.
efficiency is tested on units with a pipe length of 5 metres.
Note on Pipe Length
A minimum pipe run of 3 metres is required to minimise vibration & excessive noise.
Note on Pipe Length
Refer to the table below for specifications on the maximum length and drop height of piping.
The length of refrigerant piping will affect the performance and energy efficiency of the unit. Nominal
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 metres.
efficiency is tested on units with a pipe length of 5 metres.
A minimum pipe run of 3 metres is required to minimise vibration & excessive noise.
Maximum Length and Drop Height of Refrigerant Piping per Unit Model
A minimum pipe run of 3 metres is required to minimise vibration & excessive noise.
Model
Refer to the table below for specifications on the maximum length and drop height of piping.
Refer to the table below for specifications on the maximum length and drop height of piping.
R32 Inverter
Maximum Length and Drop Height of Refrigerant Piping per Unit Model
Split Air Conditioner
Model
Model
R32 Fixed-speed
Split Air Conditioner
R32 Inverter Split Air
R32 Inverter
Conditioner
Split Air Conditioner
R32 Fixed-speed
Split Air Conditioner
Connection Instructions – Refrigerant Piping

Connection Instructions - Refrigerant Piping

Step 1: Cut pipes
When preparing refrigerant pipes, take extra
Connection Instructions – Refrigerant Piping
Connection Instructions – Refrigerant Piping
care to cut and flare them properly. This will
ensu re efficient operation and minimise the
Step 1: Cut pipes
need for future maintenance.
1. Measure the distance between the indoor
When preparing refrigerant pipes, take extra
and outdoor units.
care to cut and flare them properly. This will
ensu re efficient operation and minimise the
2. Using a pipe cutter, cut the pipe a little longer
need for future maintenance.
than the measured distance.
3. Make sure that the pipe is cut at a perfect 90°
1. Measure the distance between the indoor
angle.
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.
Rinnai
REFRIGERANT PIPING CONNECTION
Capacity (kW)
< 4.4
≥ 4.4 and < 7
≥ 7 and < 10.5
Capacity (kW)
Capacity (kW)
< 5.3
<4.4
< 4.4
≥ 5.3 and < 10.5
≥4.4 and <7
≥ 4.4 and < 7
≥7 and <10.5
≥ 7 and < 10.5
< 5.3
≥ 5.3 and < 10.5
Max. Length (m)
25
30
50
Length (m)
Max. Length (m)
20
25
25
25
30
30
50
50
20
25
90°
Oblique Rough Warped
90°
Oblique Rough Warped
DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, dent, or
Take care not to damage, dent, or
deform the pipe while cutting. This will
deform the pipe while cutting. This may
DO NOT DEFORM PIPE
drastically reduce the heating efficiency
adversely affect the heating efficiency of
of the unit.
the unit.
WHILE CUTTING
Be extra careful not to damage, dent, or
deform the pipe while cutting. This will
drastically reduce the heating efficiency
of the unit.
23
Max. Drop Height (m)
10
20
25
Mx Drop Height (m)
Max. Drop Height (m)
8
10
10
10
20
20
25
25
8
10
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PB Series Split AC IM – Issue 1