Table 2b — refrigerant piping sizes — 50 hz, Table 2a — refrigerant piping sizes — 60 hz – Carrier 38AH024-034 User Manual
Page 6
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Table 2A — Refrigerant Piping Sizes — 60 Hz
SINGLE SUCTION RISERS
LENGTH OF INTERCONNECTING PIPING FOR EACH CIRCUIT - ft (m)
UNIT 38AH
0-25 (0-7.6)
25-50 (7.6-15.2)
50-75 (15.2-22.9)
75-100 22.9-30.5)
100-200 (30.5-61.0)
L
s
L
S
L
s
L
S
L
s
024
Ckt 1
V2
1Ve
%
1%
%
13/8
%
13/8*
У8
13/8*
Ckt2
V2
1Ve
%
1%
%
13/8
5/e
13/8t
У8
13/et
028
Ckt 1
Vz
1У8
%
1%
%
13/8
Ve
13/8*
V
b
2Ув**
Ckt 2
V2
1У8
%
13/8
%
13/8
У8
13/et
Vs
2У8**
034
Ckt 1
Vz
1У8
%
13/8
%
13/8*
У8
13/8*
Vs
2Уа**
Ckt 2
Vz
1%
%
1%
У8
15/8
У8
13/8
Vs
21/8t
DOUBLE SUCTION RISERS
LENGTH OF INTERCONNECTING PIPING - ft (m)
UNIT 38AH
50-75 (15.2-22.9)
75-100 (22.9-30.5)
100-200 (30.5-61.0)
A
В
С
A
В
С
А
В
С
024
Ckt 1
_
_
—
1Ув
13/в
13/в
1Уз
13/8
15/s
Ckt 2
—
—
—
1У8
13/8
13/8
1V8
13/8
13/8
028
Ckt 1
__
_
_
1Уе
13/8
13/8
13/8
13/8
2У8
Ckt 2
—
—
“
1Уе
13/8
13/8
13/8
13/8
2У8
034
Ckt 1
1Уе
13/8
15/8
1У8
13/8
13/8
13/8
13/8
2У8
Ckt 2
-
—
—
—
—
_
13/в
13/а
2Уа
Table 2B — Refrigerant Piping Sizes — 50 Hz
SINGLE SUCTION RISERS
LENGTH OF INTERCONNECTING PIPING FOR EACH CIRCUIT - ft (m)
UNIT 38АН
0-25 (0-7.6)
25-50 (7.6-15.2)
50-75 (15.2-22.9)
75-100 22.9-30.5)
100-200 (30.5-61.0)
L
s
L
S
L
s
L
S
L
s
024
Ckt 1
У2
1У8
3/e
13/8
3/8
13/8
3/8
13/8*
У8
13/8*
Ckt 2
У2
1У8
3/8
13/8
Vs
13/8
3/8
13/et
Vs
13/et
028
Ckt 1
Vz
1У8
%
13/8
3/8
13/8
%
13/8*
Vs
13/8**
Ckt 2
V2
1Va
3/s
13/8
3/8
13/8
3/8
13/et
Vs
13/8**
034
Ckt 1
Vz
V/a
3/8
13/8
Vs
13/8
У8
15/8*
Vs
2У8*
Ckt 2
Vz
V/s
3/8
13/8
3/8
13/8
Vs
13/8
Vs
2yet
DOUBLE SUCTION RISERS
LENGTH OF INTERCONNECTING PIPING - ft (m)
UNIT 38AH
75-100 (22.9-30.5)
100-200 (30.5-61.0)
A
В
c
A
в
c
024
Ckt 1
1У8
13/8
13/8
1У8
13/8
13/8
Ckt 2
1У8
13/e
13/8
1У8
13/8
13/8
028
Ckt 1
1У8
13/8
13/8
1У8
13/8
13/8
Ckt 2
1У8
13/8
15/e
IVe
13/8
13/8
034
Ckt 1
1У8
13/8
13/8
13/8
13/8
2У8
Ckt 2
1У8
13/8
13/8
13/e
13/8
2Ув
LEGEND
L — Liquid Line
S
— Suction Line
‘Double suction riser required if evaporator is below condensing
unit and 2 unloaders are used
tDouble suction riser required if evaporator is below condensing
unit and compressor is equipped with 2 unloaders. Note the only
time circuit no. 2 may be equipped with 2 unloaders is if it is serv
ing its own air handler and the unit does not require low ambient
operation (Motormaster® III control).
“Double suction riser required if evaporator is below condensing
unit and compressor has one or more unloaders
NOTES:
1. All line sizes are inches OD.
2. Standard unit comes with one pressure-operated unloader on cir
cuit no. 1. If unit serves one air handler, an additional unloader
may be field installed on circuit no 1 compressor only. If the unit
serves 2 separate air handlers and low-ambient operation is re
quired (Motormaster III control), each circuit’s compressor may
be equipped with
only one
unloader.
3 Equivalent line sizes in mm are as follows;
UNIT 38AH
MAXIMUM LIQUID LIFT PER CIRCUIT
ft
m
024
76
23.2
028
73
22.2
034
100
30.5
in.
mm
in.
mm
У2
12.7
13/8
34 9
3/8
15.9
13/8
41.3
У8
22.2
2Ув
54 0
1У8
28.6
(g) — Suction Riser without Trap
(g) — Suction Riser with Trap
—
Suction Line to Condensing Unit
—
Use Single Suction Pipe Diameter Shown for 75 ft (22 9 m)
^ Interconnecting Pipe in Table Above