Zero Zone RVCC30 - Page 31

REFRIGERATION
LOW TEMP (CONT.)
Figure 24: Refrigeration Line Sizing - Ice Cream
R-404 Line Sizing Tables for Zero Zone VZ Ice Cream Freezer (-16°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 7,090
1/4
+
0 4,830
1/4
+
0 3,850
1/4
+
0 3,270
1/4
+
7,100 14,600
5/16
+
4,840 9,930
5/16
+
3,860 7,930
5/16
+
3,280 6,750
5/16
+
14,610 26,500 3/8 9,940 18,200 3/8 7,940 14,500 3/8 6,760 12,400 3/8
26,510 62,800 1/2 18,210 43,100 1/2 14,510 34,500 1/2 12,410 29,400 1/2
62,810 117,000 5/8 43,110 80,900 5/8 34,510 64,800 5/8 29,410 55,400 5/8
* For hot gas defrost, use a liquid line one size larger than shown.
64,810 108,000
7/8
†
55,410 92,100
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
0.95 0.94 0.94 0.95 0.97 1.00 1.05 1.23
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:
110°F
1.12
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 1,420
3/8
++
0 970
3/8
++
0 770
3/8
++
0 660
3/8
++
1,430 3,360
1/2
++
980 2,290
1/2
++
780 1,840
1/2
++
670 1,560
1/2
++
3,370 6,300
5/8
++
2,300 4,320
5/8
++
1,850 3,450
5/8
++
1,570 2,950
5/8
++
6,310 10,500
7/8
†
4,330 7,180
7/8
†
3,460 5,750
7/8
†
2,960 4,910
7/8
†
10,510 16,600 7/8 7,190 11,400 7/8 5,760 9,120 7/8 4,920 7,790 7/8
16,610 33,600 1-1/8 11,410 23,100 1-1/8 9,130 18,600 1-1/8 7,800 15,900 1-1/8
33,610 58,400 1-3/8 23,110 40,300 1-3/8 18,610 32,400 1-3/8 15,910 27,700 1-3/8
58,410 92,300 1-5/8 40,310 63,700 1-5/8 32,410 51,200 1-5/8 27,710 43,800 1-5/8
63,710 132,000 2-1/8 51,210 107,000 2-1/8 43,810 91,000 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 0.80 0.86 0.92 1.00 1.10 1.38
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:
110°F
1.22
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
1,210 2,280 1/2
2,290 3,810 5/8
3,820 6,050
5/8
†
6,060 12,400 7/8
12,410 21,600 1-1/8
21,610 34,300 1-3/8
34,310 71,300 1-5/8
71,310 127,000 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
0.83 0.88 0.94 1.00 1.08 1.17 1.28
CCR, 3/29/07
Minimum Liquid Temperature:
Liquid Correction Factor:
SP-0612-02, Rev B
Refrigeration - Low Temp • 27