A
CU MANUAL
IOM-14
21 of 46
Feb 06 R4
Refrigeration Table 2 (R134a) Piping Guidelines for Normal Air Conditioning Duty.
R134a
Net
Evaporator
Capacity
Equivalent Length
(Actual length plus fittings and valves)
Maximum
Riser Size
Tons
Line
30 feet
50 feet
100 feet
150 feet
3 tons
Suction
7/8”
1 1/8"
1 1/8”
1 3/8”
1 3/8"
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"
4 tons
Suction
1 1/8”
1 1/8"
1 3/8”
1 3/8”
1 3/8"
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"
5 tons
Suction
1 1/8"
1 3/8"
1 3/8"
1 5/8"
1 5/8"
Discharge 3/4” (7/8”)
7/8”
7/8"
1 1/8"
1 1/8"
Liquid
1/2"
1/2"
5/8"
5/8”
Condensate
7/8”
7/8”
7.5 tons
Suction
1 3/8"
1 3/8"
1 5/8"
1 5/8"
1 5/8"
Discharge
7/8"
7/8"
1 1/8"
1 1/8"
1 1/8"
Liquid
1/2"
1/2"
5/8"
7/8"
Condensate
7/8”
7/8”
10 tons
Suction
1 3/8"
1 5/8"
2 1/8"
2 5/8"
2 1/8"
Discharge
7/8”
1 1/8"
1 1/8"
1 1/8"
1 1/8"
Liquid
5/8"
5/8"
5/8"
3/4” (7/8”)
Condensate
1 1/8”
1 1/8”
12.5 tons
Suction
1 5/8"
1 5/8"
2 1/8"
2 1/8"
2 1/8"
Discharge
1 1/8"
1 1/8"
1 1/8"
1 3/8"
1 3/8"
Liquid
5/8”
5/8"
7/8”
3/4” (7/8”)
Condensate
1 1/8"
1 1/8"
15 tons
Suction
1 5/8"
2 1/8"
2 1/8"
2 1/8"
2 1/8"
Discharge
1 1/8"
1 1/8"
1 3/8"
1 3/8"
1 3/8"
Liquid 3/4” (7/8”)
3/4” (7/8”)
7/8”
7/8"
Condensate
1 3/8"
1 3/8"
20 tons
Suction
2 1/8"
2 1/8"
2 5/8"
2 5/8"
2 5/8"
Discharge
1 1/8"
1 3/8"
1 5/8"
1 5/8"
1 5/8"
Liquid
7/8”
7/8”
7/8”
7/8”
Condensate
1 3/8”
1 3/8”
NOTES:
1.
Sizes are OD dimensions, Type L, ACR refrigeration tubing.
2.
3/4” (7/8”) noted above: 7/8” ACR tubing may replace 3/4" as required.
