Refrigerant Piping Connection 19
6.
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
Capacity
KW Duty
Max. Length
(m)
Max. Drop
Height (m)
Stating Pipe
Sizing
R410A
Inverter Split
Air
Conditioner
< 4.5KW
25 (82ft)
10 (33ft)
Suction 3/8"
& Liquid 1/4"
>4.5KW -
7KW
30 (98.5ft) 20 (66ft)
Suction 1/2"
& Liquid 1/4"
7.1KW -
10.5KW
50 (164ft)
25 (82ft)
Suction 5/8"
& Liquid 3/8"
6.1.
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. 6.1 for bad cut examples.
Figure
6-1
CAUTION
DO NOT DEFORM PIPE 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.
Step 2: Remove burrs
Burrs can affect the air-tight seal of refrigerant piping connection. They
must be completely removed.
1
Hold the pipe at a downward angle to prevent burrs from falling into
the pipe.
2
Using a reamer or deburring tool, remove all burrs from the cut
section of the pipe.
Oblique
Rough
Warped
6 720 866 139 (2016/07)
Bosch Climate 5000
