Construction
E - 4
1. Points regarding refrigerant piping construction
Indoor unit
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Outdoor unit
Outdoor unit
20cm or more
Example 1 Example 2 Example 3 Example 4
Brazing
Cutting position
Cutting position
This size to be as short as possible
(2mm or less)
Internal dowel
Internal dowel
Cutting position
Brazed part
This size to be as long as possible
(The adjoining pipe will be inserted to
this length.)
This size to be as short
as possible (8mm or less)
2) Points regarding header pipe construction
● Headers should be oriented as shown in the following drawings. In particular, care should be taken when using
vertically.
<Horizontal use> <Vertical use>
1Horizontal pointing to the side 2Horizontal pointing up
● Slant at 15°- 30°.
● On the branch on the indoor unit
side, bring the pipe up as shown in the
diagram below then resume
horizontally.
● Cut the branch pipe of the header to suit
the size of the refrigerant pipe on the
indoor unit side.
● If three indoor units are being used, cut
and connect three branches to suit the
size of the refrigerant piping on the
indoor unit side. Positions that are not
being used should be just left as they
are.
● If 5-8 indoor units are being used then
connect and use two headers as shown in
the diagram below.
● Refer to the following installation examples
● Refer to the following diagram for the cutting position.
<Connection of header piping>
● For further details, refer to the installation construction
manual.
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