Zero Zone RVCC30 - Low Temp Refrigeration

Figure 23: Refrigeration Line Sizing - Frozen Foods
R-404 Line Sizing Tables for Zero Zone VZ Frozen Food Freezer (-7°F Evaporator Temperature)
Liquid Line Sizing - Electric Defrost*
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
0 7,300
1/4
+
0 4,970
1/4
+
0 3,960
1/4
+
0 3,370
1/4
+
7,310 15,000
5/16
+
4,980 10,300
5/16
+
3,970 8,150
5/16
+
3,380 6,940
5/16
+
15,010 27,300 3/8 10,310 18,700 3/8 8,160 14,900 3/8 6,950 12,700 3/8
27,310 64,600 1/2 18,710 44,300 1/2 14,910 35,500 1/2 12,710 30,300 1/2
64,610 122,000 5/8 44,310 83,200 5/8 35,510 66,700 5/8 30,310 56,900 5/8
* For hot gas defrost, use a liquid line one size larger than shown.
66,710 111,000
7/8
†
56,910 94,800
7/8
†
∆
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.
†
3/4 liquid line may be used to reduce cost.
For rated Btuh:
For rated Btuh:
For rated Btuh:
For rated Btuh:
40°F 50°F 60°F 70°F 80°F 90°F 100°F 120°F
0.96 0.95 0.95 0.95 0.97 1.00 1.05 1.21
Liquid Correction Factor:
110°F
1.12
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:
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
0 1,730
3/8
++
0 1,180
3/8
++
0 940
3/8
++
0 800
3/8
++
1,740 4,100
1/2
++
1,190 2,810
1/2
++
950 2,240
1/2
++
810 1,910
1/2
++
4,110 7,700
5/8
++
2,820 5,280
5/8
++
2,250 4,220
5/8
++
1,920 3,600
5/8
++
7,710 12,800
7/8
†
5,290 8,780
7/8
†
4,230 7,030
7/8
†
3,610 6,000
7/8
†
12,810 20,300 7/8 8,790 14,000 7/8 7,040 11,200 7/8 6,010 9,530 7/8
20,310 41,000 1-1/8 14,010 28,200 1-1/8 11,210 22,700 1-1/8 9,540 19,400 1-1/8
41,010 71,400 1-3/8 28,210 49,200 1-3/8 22,710 39,500 1-3/8 19,410 33,800 1-3/8
71,410 113,000 1-5/8 49,210 77,800 1-5/8 39,510 62,500 1-5/8 33,810 53,500 1-5/8
62,510 130,000 2-1/8 53,510 112,000 2-1/8
‡
For 1°F pressure drop, multiply rated BTU 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.
For rated Btuh:
For rated Btuh:
For rated Btuh:
For rated Btuh:
40°F 50°F 60°F 70°F 80°F 90°F 100°F 120°F
0.72 0.76 0.81 0.86 0.92 1.00 1.09 1.37
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
Maximum Liquid Temperature:
Liquid Correction Factor:
1.21
110°F
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).
For rated Btuh:
From To Vertical
1,360 2,550 1/2
2,560 4,270 5/8
4,280 6,790
5/8
†
6,800 13,900 7/8
13,910 24,300 1-1/8
24,310 38,400 1-3/8
38,410 80,000 1-5/8
80,010 142,000 2-1/8
* 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
0.84 0.88 0.94 1.00 1.07 1.16 1.27
Minimum Liquid Temperature:
Liquid Correction Factor:
CCR, 4/4/07
SP-0612-01, Rev B
REFRIGERATION
LOW TEMP
26 • Refrigeration - Low Temp