Suction line size suction temperature – Nor-Lake Refrigeration Systems User Manual
Page 8
09/14 Rev. E 101628
8
TABLE 2
– Recommended Line Sizes for R-404A Refrigerant
Note:
Sizes that are highlighted indicate maximum suction line sizes that should be used for risers. Riser size should not
exceed horizontal size. Properly placed suction traps must also be used for adequate oil return.
All sizes shown are for O.D. type L copper tubing.
Suction line sizes selected at pressure drop equivalent to 2°F reduce estimate of system capacity accordingly. If
system load drops below 40% of design, consideration to install double suction risers should be made.
SUCTION LINE SIZE
Suction Temperature
System
Capacity
Equivalent Lengths
Equivalent Lengths
Equivalent Lengths
Equivalent
BTU/Hr
25'
50'
75'
100'
150'
200'
25'
50'
75'
100'
150'
200'
25'
50'
75'
100'
150'
200'
25'
50'
75'
1,000
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
1/2
3/8
3/8
3/8
1/2
1/2
1/2
3/8
3/8
1/2
3,000
3/8
3/8
1/2
1/2
1/2
5/8
3/8
1/2
1/2
1/2
5/8
5/8
1/2
1/2
5/8
5/8
5/8
7/8
1/2
1/2
5/8
4,000
3/8
1/2
1/2
1/2
5/8
5/8
1/2
1/2
1/2
5/8
5/8
7/8
1/2
5/8
5/8
5/8
7/8
7/8
1/2
5/8
5/8
6,000
1/2
1/2
5/8
5/8
7/8
7/8
1/2
1/2
5/8
5/8
7/8
7/8
1/2
5/8
5/8
7/8
7/8
7/8
5/8
5/8
7/8
9,000
5/8
5/8
7/8
7/8
7/8
7/8
5/8
5/8
7/8
7/8
7/8
7/8
5/8
7/8
7/8
7/8
7/8
1-1/8
5/8
7/8
7/8
12,000
5/8
7/8
7/8
7/8
7/8
7/8
5/8
7/8
7/8
7/8
7/8
1-1/8
7/8
7/8
7/8
7/8
1-1/8 1-1/8
7/8
7/8
7/8
15,000
5/8
7/8
7/8
7/8
7/8
1-1/8
7/8
7/8
7/8
7/8
1-1/8 1-1/8
7/8
7/8
7/8
1-1/8 1-1/8 1-1/8
7/8
7/8
1-1/8
18,000
7/8
7/8
7/8
7/8
1-1/8 1-1/8
7/8
7/8
7/8
1-1/8 1-1/8 1-1/8
7/8
7/8
1-1/8 1-1/8 1-1/8 1-3/8
7/8
1-1/8 1-1/8
24,000
7/8
7/8
7/8
1-1/8 1-1/8 1-1/8
7/8
1-1/8 1-1/8 1-1/8 1-1/8 1-3/8
7/8
1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-1/8 1-1/8 1-1/8
30,000
7/8
7/8
1-1/8 1-1/8 1-1/8 1-3/8
7/8
1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-1/8 1-1/8 1-1/8
36,000
7/8
1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-1/8 1-1/8 1-3/8
42,000
1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 1-1/8 1-3/8 1-3/8
48,000
1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-3/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 1-1/8 1-3/8 1-3/8
54,000
1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 1-5/8 1-3/8 1-3/8 1-5/8
60,000
1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 1-5/8 1-3/8 1-3/8 1-5/8 1-5/8 1-5/8 2-1/8 1-3/8 1-3/8 1-5/8
66,000
1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 1-5/8 1-3/8 1-5/8 1-5/8 1-5/8 1-5/8 1-5/8 1-3/8 1-5/8 1-5/8
72,000
1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 1-5/8 1-1/8 1-3/8 1-5/8 1-5/8 1-5/8 1-5/8 1-3/8 1-5/8 1-5/8 1-5/8 1-5/8 1-5/8 1-3/8 1-5/8 1-5/8
78,000
1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 1-3/8 1-3/8 1-5/8 1-5/8 1-5/8 2-1/8 1-3/8 1-5/8 1-5/8 1-5/8 1-5/8 2-1/8 1-5/8 1-5/8 1-5/8
84,000
1-1/8 1-3/8 1-5/8 1-5/8 1-5/8 2-1/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 2-1/8 1-3/8 1-5/8 1-5/8 1-5/8 2-1/8 2-1/8 1-5/8 1-5/8 1-5/8
90,000
1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 2-1/8 1-3/8 1-5/8 1-5/8 1-5/8 2-1/8 2-1/8 1-5/8 1-5/8 1-5/8 2-1/8 2-1/8 2-5/8 1-5/8 1-5/8 2-1/8
120,000
1-3/8 1-5/8 1-5/8 2-1/8 2-1/8 2-1/8 1-3/8 1-5/8 2-1/8 2-1/8 2-1/8 2-1/8 1-5/8 2-1/8 2-1/8 2-1/8 2-5/8 2-5/8 1-5/8 2-1/8 2-1/8
150,000
1-5/8 1-5/8 2-1/8 2-1/8 2-1/8 2-1/8 1-5/8 2-1/8 2-1/8 2-1/8 2-1/8 2-5/8 2-1/8 2-1/8 2-1/8 2-5/8 2-5/8 2-5/8 2-1/8 2-1/8 2-1/8
180,000
1-5/8 2-1/8 2-1/8 2-1/8 2-1/8 2-5/8 1-5/8 2-1/8 2-1/8 2-1/8 2-5/8 2-5/8 2-1/8 2-1/8 2-5/8 2-5/8 2-5/8 3-1/8 2-1/8 2-1/8 2-5/8
210,000
1-5/8 2-1/8 2-1/8 2-1/8 2-5/8 2-5/8 2-1/8 2-1/8 2-1/8 2-5/8 2-5/8 2-5/8 2-1/8 2-1/8 2-5/8 2-5/8 3-1/8 3-1/8 2-1/8 2-5/8 2-5/8
240,000
1-5/8 2-1/8 2-1/8 2-1/8 2-5/8 2-5/8 2-1/8 2-1/8 2-5/8 2-5/8 2-5/8 2-5/8 2-1/8 2-5/8 2-5/8 2-5/8 3-1/8 3-1/8 2-1/8 2-5/8 2-5/8
300,000
2-1/8 2-1/8 2-5/8 2-5/8 2-5/8 3-1/8 2-1/8 2-5/8 2-5/8 2-5/8 3-1/8 3-1/8 2-5/8 2-5/8 2-5/8 3-1/8 3-1/8 3-5/8 2-5/8 2-5/8 2-5/8
360,000
2-1/8 2-1/8 2-5/8 2-5/8 3-1/8 3-1/8 2-1/8 2-5/8 2-5/8 2-5/8 3-1/8 3-1/8 2-5/8 2-5/8 3-1/8 3-1/8 3-5/8 3-5/8 2-5/8 2-5/8 3-1/8
480,000
2-1/8 2-5/8 2-5/8 3-1/8 3-1/8 3-5/8 2-5/8 2-5/8 2-5/8 2-5/8 3-5/8 3-5/8 2-5/8 3-1/8 3-1/8 3-5/8 3-5/8 4-1/8 2-5/8 3-1/8 3-1/8
600,000
2-5/8 2-5/8 3-1/8 3-1/8 3-5/8 3-5/8 2-5/8 2-5/8 3-1/8 3-1/8 3-5/8 3-5/8 3-1/8 3-1/8 3-1/8 3-5/8 4-1/8 4-1/8 3-1/8 3-1/8 3-1/8