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Header
Follower
Follower
Follower
Follower
unit A
unit B
unit C
unit D
unit E
Outdoor unit
(8)
(8)
(8)
(8)
(1)
(1)
(1)
(1)
(8)
(8)
(8)
(2)
(2)
(2)
Main connecting piping between outdoor units
(3)
(8)
Outdoor unit connection piping kit (For linking of outdoor units)
Main
piping
(6)
(4)
Branching pipe
First branch
Y-shape
(5)
Indoor unit connecting pipe
branching joint
(4)
Indoor unit
(6)
(6)
(4)
(5)
Indoor unit
No.
Piping parts
Name
Connecting pipe size of outdoor unit
Type
38VT0081
38VT0101
Outdoor unit
38VT0121
Outdoor unit
(1)
38VT0141
(014A
Outdoor unit
connecting
connection
pipe
38VT0161
piping kit
38VT0181
38VT0201
38VT0221
38VT0241
38VT0261
(1)
Outdoor unit connecting pipes
(7)
Branching header
(4) (6)
Y-shaped branching joint
(5)
(5)
(5)
(5)
(6)
(6)
(4)
(4)
(5)
(5)
(5)
(5)
Selection of pipe size
Remarks
Gas side
Liquid side
19.1
12.7
22.2
12.7
28.6
12.7
Same as connecting
)
28.6
15.9
pipe size of the
28.6
15.9
outdoor unit.
28.6
15.9
28.6
15.9
28.6
19.1
34.9
19.1
34.9
19.1
No.
Piping parts
Name
Pipe size for connecting piping between outdoor units
the total outdoor units at
Between
Main
Outdoor unit
connecting
(2)
connection
piping between
piping kit
outdoor units
*1 It is possible to change pipe size from Ø54.0 to Ø44.5,
Size of main piping
Total capacity
outdoor units
Equivalent to
capacity (HP)
Outdoor unit
connection
piping kit of
header unit
First branching
section
(3)
Main piping
Outdoor unit
First branching
section
*1 Maximum length for the main piping is 30 m.
*2 If the length for main piping is extended up to 70 m,
*3 It is possible to change pipe size from Ø41.3 to
*4 It is possible to change pipe size from Ø54.0 to
– 16 –
Selection of pipe size
Total capacity codes of
the downstream side
Gas side
Liquid side
Equivalent
to capacity (HP)
16 to 20
28.6
15.9
22
28.6
19.1
24
34.9
19.1
26 to 34
34.9
19.1
36 to 60
41.3
22.2
62 to 74
54.0
22.2
*1
76 or more
54.0
22.2
if it is available at site.
codes of all
Liquid side
Gas
side
Refrigerant
Standard
Allowable
saving
Pipe
Length
pipe size
8
19.1
12.7
9.5
30 m
10
22.2
12.7
9.5
30 m
12
28.6
12.7
-
-
14 to 18
28.6
15.9
12.7
50 m
20
28.6
15.9
-
-
22
28.6
19.1
15.9
80 m
24 to 26
34.9
19.1
15.9
80 m
28 to 34
34.9
19.1
-
-
36 to 42
41.3
22.2
19.1
80 m
*3
44 to 52
41.3
22.2
19.1
50 m
*3
54
41.3
22.2
19.1
50 m
56 to 60
41.3
22.2
-
-
62 to 74
54.0
22.2
-
-
*4
76 to 92
54.0
22.2
-
-
94 or more
54.0
22.2
-
-
*1*2
change the liquid side piping size to Ø25.4
(one size up).
Ø38.1, if it is available at site.
Ø44.5, if it is available at site.
Remarks
Pipe size differs
based on the total
capacity code value
of outdoor units.
Pipe size differs
based on the total
capacity code value
of outdoor units.
If the allowable
length has the
EN
allowable value or
less, the refrigerant
saving pipe size can
be selected.
EN
EN
ID
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