Fujitsu Airstage J-IVS AJ 040LCLDH Series Design & Technical Manual page 685

¢ Pipe size selection
Use the following tables to select the Refrigeration Pipe Size, Separation tube and Header.
• Pipe size table "A"
Between outdoor unit and the first separation tube (header)
Outdoor unit
HP
model code
4 40
5 45
6 54
• Pipe size table "B"
Between Separation tube and Separation tube (Header)
Total cooling capacity of indoor unit
• Pipe size table "C"
Between Separation tube (Header) and indoor unit
Indoor unit model code
04, 07, 09, 12, 14
18, 24, 30, 34
36, 45, 54
NOTE: If the selected pipe diameter between Separation tube (Header) and indoor unit (based on
the table "C") becomes larger than the pipe diameter between Separation tube and Sepa-
ration tube (Header) (based on the table "B"), select the pipe whose diameter is equal to
the one between Separation tube and Separation tube (Header).
(If pipe diameter C > B, select pipe size from table B)
It is necessary to change a connection pipe diameter using reducer.
2-3. Pipe size
Outdoor
unit
First separation tube (optional)
Outdoor unit cooling
capacity
kW
12.1
14.0
15.1
kW
2.2 to 19.6
Indoor unit cooling capacity
1.1, 2.2, 2.8, 3.6, 4.5
5.6, 7.1, 9.0, 10.0
Separation tube (optional)
Header (optional)
Liquid pipe
9.52 (3/8)
9.52 (3/8)
9.52 (3/8)
Liquid pipe
9.52 (3/8)
kW
11.2, 12.5, 14.0
- (06-25) -
Pipe size
(table "A")
Pipe size
(table "B")
Pipe size
(table "C")
Outside diameter
Gas pipe
mm (in)
15.88 (5/8)
15.88 (5/8)
15.88 (5/8)
Outside diameter
Gas pipe
mm (in)
15.88 (5/8)
Outside diameter
Liquid pipe Gas pipe
mm (in)
6.35 (1/4) 12.70 (1/2)
9.52 (3/8) 15.88 (5/8)
9.52 (3/8) 19.05 (3/4)
2. Piping design