Carrier 38VT 188CTST Series - Page 17

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