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AF / DCU MANUAL
IOM-52 13 of 23 Apr 13 R2
RefrigerationTable2(R134a)PipingGuidelinesforNormalAirConditioningDuty.
R134a
Net
Evaporator
Capacity
EquivalentLength
(Actuallengthplusfittingsandvalves)
Maximum
RiserSize
Tons Line 30feet 50feet 100feet 150feet
3tons
Suction 7/8” 11/8" 11/8” 13/8” 13/8"
Discharge 5/8" 3/4”(7/8”) 3/4”(7/8”) 7/8" 7/8"
Liquid 3/8" 3/8” 1/2" 1/2"
Condensate 5/8" 5/8"
4tons Suction 11/8” 11/8" 13/8” 13/8” 13/8"
Discharge 3/4”(7/8”) 3/4”(7/8”) 7/8” 7/8" 7/8"
Liquid 1/2" 1/2” 1/2" 1/2"
Condensate 7/8" 7/8"
5tons Suction 11/8" 13/8" 13/8" 15/8" 15/8"
Discharge 3/4”(7/8”) 7/8” 7/8" 11/8" 11/8"
Liquid 1/2" 1/2" 5/8" 5/8”
Condensate 7/8” 7/8”
7.5tons Suction 13/8" 13/8" 15/8" 15/8" 15/8"
Discharge 7/8" 7/8" 11/8" 11/8" 11/8"
Liquid 1/2" 1/2" 5/8" 7/8"
Condensate 7/8” 7/8”
10tons Suction 13/8" 15/8" 21/8" 25/8" 21/8"
Discharge 7/8” 11/8" 11/8" 11/8" 11/8"
Liquid 5/8" 5/8" 5/8" 3/4”(7/8”)
Condensate 11/8” 11/8”
12.5tons Suction 15/8" 15/8" 21/8" 21/8" 21/8"
Discharge 11/8" 11/8" 11/8" 13/8" 13/8"
Liquid 5/8” 5/8" 7/8” 3/4”(7/8”)
Condensate 11/8" 11/8"
15tons Suction 15/8" 21/8" 21/8" 21/8" 21/8"
Discharge 11/8" 11/8" 1 3/8" 13/8" 13/8"
Liquid 3/4”(7/8”) 3/4”(7/8”) 7/8” 7/8"
Condensate 13/8" 13/8"
20tons Suction 21/8" 21/8" 25/8" 25/8" 25/8"
Discharge 11/8" 13/8" 15/8" 15/8" 15/8"
Liquid 7/8” 7/8” 7/8” 7/8”
Condensate 13/8” 13/8”
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