Installation Manual
33
ENGLISH
1. Use the following materials for refrigerant piping.
• Material: Seamless phosphorous deoxidized copper pipe
• Wall thickness : Comply with the relevant local and national regulations for the designed pressure
3.8MPa. We recommend the following table as the minimum wall thickness.
2. Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert
gas.
3. Use care to prevent dust, water or other contaminants from entering the piping during installation.
4. Reduce the number of bending portions as much as possible, and make bending radius as big as possible.
5. If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut the connecting
section and then use an adapter for connecting different diameters to connect the piping.
6. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and piping diame-
ter).
Failure to do so can result in equipment failure or a decline in heating/cooling performance.
7. A second branch cannot be made after a header. (These are shown by
.)
8. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always properly
charge the unit. When servicing, always check the notes concerning both the piping length and the amount of addi-
tional refrigerant.
9.
Never perform a pump down. This will not only damage the compressor but also deteriorate the performance.
10.
Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.
Caution
0.99
22.2
1.1
31.8
1.21
34.9
1.35
38.1
1.43
41.3
0.99
28.58
0.99
25.4
0.99
19.05
0.99
15.88
0.8
12.7
0.8
9.52
0.8
6.35
Minimum
thickness [mm]
Outer diameter
[mm]
Refrigerant piping system
To Outside Unit
Sealed Piping
A
A
B
A
B
MFL67705803 2018. 9. 17. 오오 12:58 Page 33
Содержание MULTI V WATER IV ARWV100DAL4
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