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Chapter 5
Table 5-5: R-134a Refrigerant Line Sizes for Remote Systems Commercial Refrigeration
Cond. Unit
CAPACITY
(BTU/Hr.)
SUCTION LINE SIZES
AT SYSTEMS EVAPORATOR DESIGN TEMPERATURE
Liquid Line
Size-40°F -20°F 0°F +20°F +40°F
1200 5/8 1/2 3/8 3/8 3/8 1/4
2400 3/4 5/8 1/2 1/2 3/8 1/4
3600 7/8 3/4 5/8 1/2 1/2 1/4
4800 1 1/8 7/8 3/4 5/8 1/2 1/4
6000 1 1/8 7/8 3/4 5/8 1/2 1/4
7200 1 3/8 1 1/8 7/8 3/4 5/8 1/4
8400 1 3/8 1 1/8 7/8 3/4 5/8 3/8
9600 1 5/8 1 1/8 7/8 3/4 5/8 3/8
10800 1 5/8 1 3/8 1 1/8 7/8 3/4 3/8
12000 1 5/8 1 3/8 1 1/8 7/8 3/4 3/8
18000 2 1/8 1 5/8 1 3/8 1 1/8 7/8 3/8
24000 2 5/8 2 1/8 1 3/8 1 3/8 1 1/8 1/2
36000 3 1/8 2 1/8 2 1/8 1 3/8 1 1/8 1/2
48000 3 5/8 2 5/8 2 1/8 1 5/8 1 3/8 1/2
60000 3 5/8 3 1/8 2 5/8 2 1/8 1 5/8 1/2
72000 4 1/8 3 1/8 2 5/8 2 1/8 1 5/8 1/2
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