Selection Of Refrigerant Piping - Toshiba MiNi-SMMS Installation Manual

Selection of refrigerant piping

Gas pipe
Main pipe
1
No. Piping parts
Outdoor unit

↓
Main pipe
1st branching section
Branching section
‚ ↓
Branching pipe
Branching section
Branching section
Indoor unit
ƒ ↓
connecting pipe
Indoor unit
Y-shape branch joint
„
Branching section
Branch header
Outdoor unit
Liquid pipe
Branching
1st branching
pipe
section
2
4
3
Y-shape
Branching
branch joint
pipe
4
2
3
Name
Size of main pipe
Outdoor unit capacity type
Pipe size between branching sections
Total capacity codes of indoor units
Note) If the total capacity code value of indoor units exceeds that of the outdoor units,
apply the capacity code of outdoor units.
Connecting pipe size of indoor unit
Indoor unit capacity type
Selection of branching section
Y-shape branch joint
Branch header
Note) *1 : When using a Y-shape branching joint for the 1st branch, select according to
capacity code of the outdoor unit.
*2 : For 1 line after branching header indoor units with a maximum capacity code of
6.0 in total can be connected.
Branch header
4
3
Indoor unit
4
2
Selection of pipe size
0401 type
0501 type
0601 type
at down stream side
Equivalent to HP
Below 2.8
2.8 to below 6.4
6.4 to below 7.2
007, 009, 012 type
015, 018 type
024, 030, 036, 048 type
Total capacity codes of indoor
units at down stream side
6.4 or more and up to 7.8
For 4 branches
For 8 branches
12
3 3
3 3
Gas pipe
15.9
15.9
19.1
Gas pipe
12.7
15.9
19.1
Gas pipe
9.5
12.7
15.9
Equivalent to HP
Below 6.4
Up to 7.8
Up to 7.8
Liquid pipe
9.5
9.5
9.5
Liquid pipe
9.5
9.5
9.5
Liquid pipe
6.4
6.4
9.5
Model name
RBM-BY53E
RBM-BY103E
RBM-HY1043E
RBM-HY1083E