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6/21 57-02611 / 101628 ©2021, Refrigerated Solutions Group™. All rights reserved. 19
Table 7. Recommended Line Sizes for R-404A and R507*
NOTES:
1.
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.
2.
All sizes shown are for O.D. Type L copper tubing.
3.
Suction line sizes selected at pressure drop equivalent to 2˚F. Reduce estimate of system capacity accordingly.
4.
Recommended liquid line size may increase with reverse cycle hot gas systems.
5.
If system load drops below 40% of design, consideration to installing double suction risers should be made.
Capacity
BTUH
Suction Line Size
Liquid Line Size
Suction Temperature
Receiver to
Expansion Valve
Equivalent
Lengths
+20˚F
Equivalent Lengths
+10˚F
Equivalent Lengths
-10˚F
Equivalent Lengths
-20˚F
Equivalent Lengths
-30˚F
Equivalent Lengths
-40˚F
Equivalent Lengths
25'
50'
100'
150'
25'
50'
100'
150'
25'
50'
100'
150'
25'
50'
100'
150'
25'
50'
100'
150'
25'
50'
100'
150'
25'
50'
100'
150'
1,000
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
1/2
1/2
3/8
3/8
1/2
1/2
3/8
3/8
1/2
1/2
3/8
1/2
1/2
5/8
3/8
3/8
3/8
3/8
3,000
3/8
3/8
1/2
1/2
3/8
1/2
1/2
5/8
1/2
1/2
5/8
5/8
1/2
1/2
5/8
7/8
1/2
1/2
5/8
7/8
1/2
1/2
5/8
7/8
3/8
3/8
3/8
3/8
4,000
3/8
1/2
1/2
5/8
1/2
1/2
5/8
5/8
1/2
5/8
5/8
7/8
1/2
5/8
7/8
7/8
5/8
5/8
7/8
7/8
1/2
5/8
7/8
7/8
3/8
3/8
3/8
3/8
6,000
1/2
1/2
5/8
7/8
1/2
1/2
5/8
7/8
1/2
5/8
7/8
7/8
5/8
5/8
7/8
7/8
5/8
5/8
7/8
7/8
5/8
5/8
7/8
7/8
3/8
3/8
3/8
3/8
9,000
5/8
5/8
7/8
7/8
5/8
5/8
7/8
7/8
5/8
7/8
7/8
7/8
5/8
7/8
7/8
1-
1/8
5/8
7/8
7/8
1-
1/8
5/8
7/8
7/8
1-
1/8
3/8
3/8
3/8
3/8
12,000
5/8
7/8
7/8
7/8
5/8
7/8
7/8
7/8
7/8
7/8
7/8
1-
1/8
7/8
7/8
1-
1/8
1-
1/8
7/8
7/8
1-
1/8
1-
1/8
7/8
7/8
1-
1/8
1-
1/8
3/8
3/8
3/8
3/8
15,000
5/8
7/8
7/8
7/8
7/8
7/8
7/8
1-
1/8
7/8
7/8
1-
1/8
1-
1/8
7/8
7/8
1-
1/8
1-
1/8
7/8
7/8
1-
1/8
1-
1/8
7/8
7/8
1-
1/8
1-
1/8
3/8
3/8
3/8
1/2
18,000
7/8
7/8
7/8
1-
1/8
7/8
7/8
1-
1/8
1-
1/8
7/8
7/8
1-
1/8
1-
1/8
7/8
1-
1/8
1-
1/8
1-
3/8
7/8
1-
1/8
1-
1/8
1-
3/8
7/8
1-
1/8
1-
1/8
1-
3/8
3/8
3/8
1/2
1/2
24,000
7/8
7/8
1-
1/8
1-
1/8
7/8
1-
1/8
1-
1/8
1-
1/8
7/8
1-
1/8
1-
1/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
3/8
3/8
1/2
1/2
30,000
7/8
7/8
1-
1/8
1-
1/8
7/8
1-
1/8
1-
1/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
3/8
1/2
1/2
1/2
36,000
7/8
1-
1/8
1-
1/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
3/8
1-
3/8
1-
3/8
1-
1/8
1-
3/8
1-
3/8
1-
5/8
1/2
1/2
1/2
1/2
42,000
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
3/8
1-
3/8
1-
5/8
1-
1/8
1-
3/8
1-
5/8
1-
5/8
1-
1/8
1-
3/8
1-
3/8
1-
5/8
1-
1/8
1-
3/8
1-
3/8
1-
5/8
1/2
1/2
1/2
5/8
48,000
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
1/8
1-
3/8
1-
5/8
1-
1/8
1-
3/8
1-
3/8
1-
5/8
1-
1/8
1-
3/8
1-
5/8
1-
5/8
1-
1/8
1-
3/8
1-
3/8
1-
5/8
1-
1/8
1-
3/8
1-
3/8
1-
5/8
1/2
1/2
5/8
5/8
54,000
1-
1/8
1-
1/8
1-
3/8
1-
3/8
1-
1/8
1-
3/8
1-
3/8
1-
5/8
1-
3/8
1-
3/8
1-
5/8
1-
5/8
1-
3/8
1-
3/8
1-
5/8
1-
5/8
1-
3/8
1-
3/8
1-
5/8
1-
5/8
1-
3/8
1-
3/8
1-
5/8
1-
5/8
1/2
1/2
5/8
5/8
60,000
1-
1/8
1-
1/8
1-
3/8
1-
5/8
1-
1/8
1-
3/8
1-
5/8
1-
5/8
1-
3/8
1-
3/8
1-
5/8
1-
5/8
1-
3/8
1-
3/8
1-
5/8
1-
5/8
1-
3/8
1-
3/8
1-
5/8
1-
5/8
1-
3/8
1-
3/8
1-
5/8
1-
5/8
1/2
1/2
5/8
5/8
66,000
1-
1/8
1-
3/8
1-
3/8
1-
5/8
1-
1/8
1-
3/8
1-
5/8
1-
5/8
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-
3/8
1-
5/8
1-
5/8
1-
5/8
1-
3/8
1-
5/8
1-
5/8
1-
5/8
1/2
1/2
5/8
5/8
72,000
1-
1/8
1-
3/8
1-
5/8
1-
5/8
1-
1/8
1-
3/8
1-
5/8
1-
5/8
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-
3/8
1-
5/8
1-
5/8
1-
5/8
1-
3/8
1-
5/8
1-
5/8
1-
5/8
1/2
5/8
5/8
5/8
78,000
1-
1/8
1-
3/8
1-
5/8
1-
5/8
1-
3/8
1-
3/8
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-
5/8
2-
1/8
1-
5/8
1-
5/8
1-
5/8
2-
1/8
1-
5/8
1-
5/8
1-
5/8
2-
1/8
5/8
5/8
5/8
5/8
84,000
1-
1/8
1-
3/8
1-
5/8
1-
5/8
1-
3/8
1-
3/8
1-
5/8
2-
1/8
1-
3/8
1-
5/8
1-
5/8
2-
1/8
1-
5/8
1-
5/8
2-
1/8
2-
1/8
1-
5/8
1-
5/8
2-
1/8
2-
1/8
1-
5/8
1-
5/8
2-
1/8
2-
1/8
5/8
5/8
5/8
7/8
90,000
1-
3/8
1-
3/8
1-
5/8
2-
1/8
1-
3/8
1-
5/8
1-
5/8
2-
1/8
1-
5/8
1-
5/8
2-
1/8
2-
1/8
1-
5/8
1-
5/8
2-
1/8
2-
1/8
1-
5/8
2-
1/8
2-
1/8
2-
1/8
1-
5/8
1-
5/8
2-
1/8
2-
1/8
5/8
5/8
7/8
7/8
120,000
1-
3/8
1-
5/8
2-
1/8
2-
1/8
1-
3/8
1-
5/8
2-
1/8
2-
1/8
1-
5/8
2-
1/8
2-
1/8
2-
5/8
1-
5/8
2-
1/8
2-
1/8
2-
5/8
1-
5/8
2-
1/8
2-
1/8
2-
5/8
1-
5/8
2-
1/8
2-
1/8
2-
5/8
5/8
5/8
7/8
7/8
150,000
1-
5/8
1-
5/8
2-
1/8
2-
1/8
1-
5/8
2-
1/8
2-
1/8
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-
1/8
2-
1/8
2-
5/8
2-
5/8
2-
1/8
2-
1/8
2-
5/8
2-
5/8
5/8
7/8
7/8
7/8
180,000
1-
5/8
2-
1/8
2-
1/8
2-
1/8
1-
5/8
2-
1/8
2-
1/8
2-
5/8
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-
1/8
2-
1/8
2-
5/8
2-
5/8
2-
1/8
2-
1/8
2-
5/8
2-
5/8
7/8
7/8
7/8
1-
1/8
210,000
1-
5/8
2-
1/8
2-
1/8
2-
5/8
2-
1/8
2-
1/8
2-
5/8
2-
5/8
2-
1/8
2-
1/8
2-
5/8
3-
1/8
2-
1/8
2-
5/8
2-
5/8
3-
1/8
2-
1/8
2-
5/8
2-
5/8
3-
1/8
2-
1/8
2-
5/8
2-
5/8
3-
1/8
7/8
7/8
1-
1/8
1-
1/8
240,000
1-
5/8
2-
1/8
2-
1/8
2-
5/8
2-
1/8
2-
1/8
2-
5/8
2-
5/8
2-
1/8
2-
5/8
2-
5/8
3-
1/8
2-
1/8
2-
5/8
2-
5/8
3-
1/8
2-
5/8
2-
5/8
3-
1/8
3-
1/8
2-
5/8
2-
5/8
3-
1/8
3-
1/8
7/8
7/8
1-
1/8
1-
1/8
300,000
2-
1/8
2-
1/8
2-
5/8
2-
5/8
2-
1/8
2-
5/8
2-
5/8
3-
1/8
2-
5/8
2-
5/8
3-
1/8
3-
1/8
2-
5/8
2-
5/8
3-
1/8
3-
5/8
2-
5/8
2-
5/8
3-
1/8
3-
5/8
2-
5/8
2-
5/8
3-
5/8
3-
5/8
7/8
1-
1/8
1-
1/8
1-
3/8
360,000
2-
1/8
2-
1/8
2-
5/8
3-
1/8
2-
1/8
2-
5/8
2-
5/8
3-
1/8
2-
5/8
2-
5/8
3-
1/8
3-
5/8
2-
5/8
2-
5/8
3-
5/8
3-
5/8
2-
5/8
3-
1/8
3-
5/8
3-
5/8
2-
5/8
3-
1/8
3-
5/8
4-
1/8
1-
1/8
1-
1/8
1-
3/8
1-
3/8
480,000
2-
1/8
2-
5/8
3-
1/8
3-
1/8
2-
5/8
2-
5/8
2-
5/8
3-
5/8
2-
5/8
3-
1/8
3-
5/8
3-
5/8
2-
5/8
3-
1/8
3-
5/8
3-
5/8
3-
1/8
3-
5/8
4-
1/8
4-
1/8
3-
1/8
3-
5/8
4-
1/8
4-
1/8
1-
1/8
1-
1/8
1-
3/8
1-
5/8
600,000
2-
5/8
2-
5/8
3-
1/8
3-
5/8
2-
5/8
2-
5/8
3-
1/8
3-
5/8
3-
1/8
3-
1/8
3-
5/8
4-
1/8
3-
1/8
3-
1/8
3-
5/8
3-
5/8
3-
1/8
3-
5/8
4-
1/8
4-
1/8
3-
1/8
3-
5/8
4-
1/8
4-
1/8
1-
1/8
1-
3/8
1-
5/8
1-
5/8
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