20
Table 7 — Refrigerant Piping Requirements (cont)
38APS025-50 Single-Circuit Units Double Suction Riser (60 Hz)
38APD025-100 Dual-Circuit Units Double Suction Riser (60 Hz)
LEGEND
1. Refer to the figure located to the right for suction line piping locations.
2. Pipe sizes are based on an equivalent length equal to the maximum
length of interconnecting piping, shown for each column, plus 50% for
fittings.
3. Suction and liquid line sizing is based on pressure drop equivalent to 2 F
(1.1 C) at nominal rating conditions.
4. All pipe sizes are OD inches. Equivalent sizes in millimeters follow:
38APS
UNIT
SIZE
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE, ft (m)
0-25 25-50 50-75 75-100 100-125 125-150 150-175 175-200
(0-7.6) (7.6-15.2) (15.2-22.9) (22.9-30.5) (30.5-38.1) (38.1-45.7) (45.7-53.3) (53.3-61.0)
ABCABCABCABCABCABCABCABC
025 ————————————1
3/815/821/813/815/821/813/815/821/813/815/821/8
027 —————————1
3/815/821/813/815/821/813/815/821/813/815/821/813/815/821/8
030 ——————1
3/815/821/813/815/821/813/815/821/813/815/821/813/815/821/813/815/821/8
040 ———1
3/815/821/813/815/821/813/815/821/813/815/821/813/815/821/815/821/825/815/821/825/8
050 ———1
3/815/821/813/815/821/813/815/821/815/821/825/815/821/825/815/821/825/815/821/825/8
38APD UNIT
SIZE
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE, ft (m)
0-25 25-50 50-75 75-100 100-125 125-150 150-175 175-200
(0-7.6) (7.6-15.2) (15.2-22.9) (22.9-30.5) (30.5-38.1) (38.1-45.7) (45.7-53.3) (53.3-61.0)
ABCABCABCABCABCABCABCABC
025 Ckt A————————————————————————
Ckt B————————————————————————
027 Ckt A————————————————————————
Ckt B————————————————————————
030 Ckt A————————————————————————
Ckt B————————————————————————
040 Ckt A———————————————1
3/815/821/813/815/821/813/815/821/8
Ckt B—————————————————————1
3/815/821/8
050 Ckt A————————————1
3/815/821/813/815/821/813/815/821/813/815/821/8
Ckt B—————————1
3/815/821/813/815/821/813/815/821/813/815/821/813/815/821/8
060 Ckt A—————————1
3/815/821/813/815/821/813/815/821/813/815/821/813/815/821/8
Ckt B——————1
3/815/821/813/815/821/813/815/821/813/815/821/813/815/821/813/815/821/8
070 Ckt A——————1
3/815/821/813/815/821/813/815/821/813/815/821/813/815/821/813/815/821/8
Ckt B — — — 13/815/821/813/815/821/813/815/821/813/815/821/813/815/821/813/815/821/815/821/825/8
080 Ckt A——————1
3/815/821/813/815/821/813/815/821/813/815/821/813/815/821/813/815/821/8
Ckt B — — — 13/815/821/813/815/821/813/815/821/815/821/825/815/821/825/815/821/825/815/821/825/8
090 Ckt A — — — 13/815/821/813/815/821/813/815/821/813/815/821/813/815/821/815/821/825/815/821/825/8
Ckt B — — — 13/815/821/813/815/821/813/815/821/815/821/825/815/821/825/815/821/825/815/821/825/8
100 Ckt A — — — 13/815/821/813/815/821/813/815/821/815/821/825/815/821/825/815/821/825/815/821/825/8
Ckt B — — — 13/815/821/813/815/821/813/815/821/815/821/825/815/821/825/815/821/825/815/821/825/8
——Not Required
Pipe A — Suction Riser without Trap
Pipe B — Suction Riser with Trap
Pipe C — Suction Line Condensing Unit
in. mm
1/212.7
5/815.9
7/822.2
11/828.6
13/834.9
15/841.3
21/854.0
25/866.7
LEGEND
—Suction Riser
without Trap
—Suction Riser
with Trap
—Suction Line to
Condensing Unit
—Pipe Diameter to be
as Listed in Fig. 12.