R-404 Line Sizing Tables for Zero Zone RVCC Cooler (+28°F Evaporator Temperature)
Up to 50 equivalent feet Up to 100 equivalent feet Up to 150 equivalent feet Up to 200 equivalent feet
90°F Liquid, 2°F Pressure Drop
∆
90°F Liquid, 2°F Pressure Drop
∆
90°F Liquid, 2°F Pressure Drop
∆
90°F Liquid, 2°F Pressure Drop
∆
From To Liquid Line From To Liquid Line From To Liquid Line From To Liquid Line
3/16
+
0 1,870
3/16
+
0 1,480
3/16
+
0 1,260
3/16
+
1/4
+
1,880 5,480
1/4
+
1,490 4,360
1/4
+
1,270 3,710
1/4
+
5/16
+
5,490 11,300
5/16
+
4,370 8,990
5/16
+
3,720 7,660
5/16
+
16,610 30,100 3/8 11,310 20,600 3/8 9,000 16,500 3/8 7,670 14,000 3/8
30,110 71,200 1/2 20,610 48,800 1/2 16,510 39,100 1/2 14,010 33,400 1/2
48,810 91,700 5/8 39,110 73,500 5/8 33,410 62,800 5/8
∆
For 1°F pressure drop, multiply rated Btuh by 1.45 before using the Liquid Line Sizing Table.
+
Larger liquid line size may be used (such as 3/8), if preferred.
40°F 50°F 60°F 70°F 80°F 90°F 100°F 120°F
0.98 0.97 0.96 0.97 0.98 1.00 1.04 1.17
Liquid Correction Factors for Liquid Line Sizing Table - Use Maximum Liquid Temperature
For maximum liquid temperatures other than 90°F, multiply rated Btuh by liquid correction factor before using the Liquid Line Sizing Table
Maximum Liquid Temperature:
Liquid Correction Factor:
Suction Horizontal Line Sizing
Up to 50 equivalent feet Up to 100 equivalent feet Up to 150 equivalent feet Up to 200 equivalent feet
90°F Liquid, 2°F Pressure Drop
‡
90°F Liquid, 2°F Pressure Drop
‡
90°F Liquid, 2°F Pressure Drop
‡
90°F Liquid, 2°F Pressure Drop
‡
From To Horizontal From To Horizontal From To Horizontal From To Horizontal
5/16
++
0 1,350
5/16
++
0 1,080
5/16
++
0 920
5/16
++
1,980 3,580 3/8 1,360 2,450 3/8 1,090 1,960 3/8 930 1,670 3/8
3,590 8,460 1/2 2,460 5,810 1/2 1,970 4,650 1/2 1,680 3,970 1/2
8,470 15,900 5/8 5,820 10,900 5/8 4,660 8,740 5/8 3,980 7,470 5/8
15,910 26,300
7/8
†
10,910 18,100
7/8
†
8,750 14,600
7/8
†
7,480 12,500
7/8
†
26,310 41,600 7/8 18,110 28,700 7/8 14,610 23,100 7/8 12,510 19,700 7/8
41,610 84,000 1-1/8 28,710 58,000 1-1/8 23,110 46,700 1-1/8 19,710 40,000 1-1/8
46,710 81,300 1-3/8 40,010 69,600 1-3/8
‡
For 1°F pressure drop, multiply rated Btuh by 1.44 before using the Suction Horizontal Line Sizing Table.
++
Larger suction horizontal line size may be used, if preferred.
†
3/4 horizontal suction line may be used to reduce cost.
40°F 50°F 60°F 70°F 80°F 90°F 100°F 120°F
0.74 0.78 0.82 0.87 0.93 1.00 1.08 1.32
Maximum Liquid Temperature:
Liquid Correction Factor:
Liquid Correction Factors for Suction Horizontal Line Sizing Table - Use Maximum Liquid Temperature
For maximum liquid temperatures other than 90°F, multiply rated Btuh by liquid correction factor before using the Suction Horizontal Line Sizing Table
Suction Vertical Riser Sizing
Maximum Allowable Riser Size For Adequate Oil Return*
70°F Minimum Liquid Temperature, using 0.35 PSI Per 100 Feet (per 2006 ASHRAE Handbook - Refrigeration)
480 880 5/16
890 2,090 3/8
2,100 3,950 1/2
3,960 6,590 5/8
6,600 10,500
10,510 21,300 7/8
21,310 37,300 1-1/8
37,310 59,100 1-3/8
* If horizontal line size is smaller than specified vertical riser size, the smaller size may be used for both.
†
3/4 suction riser may be used to reduce pressure drop.
It may be necessary to make adjustments to compensate for
special situations which cause the actual Btuh to differ from
the rated Btuh of the cases.
All liquid line and suction line sizes are inches, refrigeration O.D.
Subject to change without notice.
Liquid Correction Factors for Suction Vertical Riser Sizing Table - Use Minimum Liquid Temperature
Multiply rated Btuh by liquid correction factor before using the Suction Vertical Riser Sizing Table
40°F 50°F 60°F 70°F 80°F 90°F 100°F
0.85 0.89 0.94 1.00 1.07 1.15 1.24
Liquid Correction Factor:
Minimum Liquid Temperature:
Figure 25: Refrigeration Line Sizing
REFRIGERATION
MEDIUM TEMP
28 • Refrigeration - Medium Temp
To Next Page
Loading...
