
Installation and Operations Manual
Table 5A. Recommended Line Sizes for R-404A/R-507*
| | | | | | | | | | Suction Line Size | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | |
System | | | | | | | | | Suction Temperature | | | | | | | | |
Capacity | | | 20˚F | | | | | 10˚F | | | | | | -10˚F | | | | -20˚F | |
BTU/H | | Equivalent Lengths | | | Equivalent Lengths | | | | Equivalent Lengths | | Equivalent |
| | | | | | | | | | | | | | | | | | | | | | | |
| 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 |
| | | | | | | | | | | | | | | | | | | | | | | |
720,000 | 2-5/8 | 3-1/8 | 3-1/8 | 3-5/8 | 3-5/8 | 4-1/8 | 3-1/8 | 3-1/8 | 3-5/8 | | 3-5/8 | 4-1/8 | 4-1/8 | | 3-5/8 | 3-5/8 | 4-1/8 | 5-1/8 | 5-1/8 | 5-1/8 | 3-5/8 | 4-1/8 | 5-1/8 |
900,000 | 3-1/8 | 3-1/8 | 3-5/8 | 3-5/8 | 4-1/8 | 4-1/8 | 3-1/8 | 3-5/8 | 3-5/8 | | 4-1/8 | 5-1/8 | 5-1/8 | | 3-5/8 | 4-1/8 | 5-1/8 | 5-1/8 | 5-1/8 | 5-1/8 | 4-1/8 | 5-1/8 | 5-1/8 |
| | | | | | | | | | | | | | | | | | | | | | | |
* 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. All sizes shown are for OD Type L copper tubing
2.Suction line sizes selected at pressure drop equivalent to 2˚F. Reduce estimate of system capacity accordingly
3.Recommended liquid line size may increase with reverse cycle hot gas systems
4.If system load drops below 40% of design, consideration to installing double suction risers should be made