Addison RC/FC Series Installation Operation & Maintenance page 24

RC/FC Series Installation, Operation, and Maintenance Manual
Table 3c: Lineset Recommended Sizes
Nominal Btu/h
per refrigerant
circuit
Suction(2)
42,000
48,000
60,000
72,000
84,000
96,000
120,000
150,000
180,000
220,000
250,000
300,000
350,000
400,000
Nominal Btu/h
per refrigerant
circuit
Suction(2)
42,000
48,000
60,000
72,000
84,000
96,000
120,000
150,000
180,000
220,000
250,000
300,000
350,000
400,000
(2) Loop piping to top of coil.
(3) Based on maximum vertical separation of 10 feet. Submit sketch for factory review if greater.
(4) Hot gas reheat, if ordered, requires one line per circuit. Pitch hot gas (discharge) lines in direction refrigerant flow - minimum 1/8"
per foot.
Example for dual circuit unit: if total system capacity is 240,000 Btu/h, divide by 2 and use the line sizes for 120,000 Btu/h for each
circuit. Follow industry standard refrigeration recommendations for piping. Suction (Vapor) and hot gas reheat lines must be insulated.
Page 24 of 80
Indoor Unit Located Level With, or Above Outdoor Unit
Equivalent length up to 25'
Size inches O.D.
Liquid(3)
3/4 3/8
3/4 1/2
3/4 1/2
3/4 1/2
3/4 5/8
7/8 5/8
7/8 5/8
1-1/8 3/4
1-1/8 3/4
1-1/8 3/4
1-3/8 3/4
1-3/8 7/8
1-5/8 7/8
1-5/8 1-1/8
Equivalent length 51' to 75'
Size inches O.D.
Liquid(3)
3/4 1/2
7/8 1/2
7/8 5/8
7/8 5/8
1-1/8 5/8
1-1/8 5/8
1-1/8 3/4
1-1/8 3/4
1-3/8 3/4
1-3/8 3/4
1-3/8 1-1/8
1-5/8 1-1/8
1-5/8 1-1/8
1-5/8 1-1/8
Equivalent length 26' to 50'
Hot gas
Suction(2)
reheat(4)
1/2 3/4
1/2 3/4
5/8 3/4
5/8 7/8
5/8 7/8
5/8 1-1/8
5/8 1-1/8
3/4 1-1/8
3/4 1-1/8
7/8 1-3/8
7/8 1-3/8
7/8 1-3/8
1-1/8 1-5/8
1-1/8 1-5/8
Equivalent length 76' to 100'
Hot gas
Suction(2)
reheat(4)
1/2 7/8
5/8 7/8
5/8 1-1/8
3/4 1-1/8
7/8 1-1/8
7/8 1-1/8
7/8 1-1/8
7/8 1-3/8
1-1/8 1-3/8
1-1/8 1-3/8
1-1/8 1-5/8
1-1/8 1-5/8
1-1/8 1-5/8
1-1/8 1-5/8
Size inches O.D.
Hot gas
Liquid(3)
reheat(4)
1/2 1/2
1/2 5/8
1/2 5/8
5/8 5/8
5/8 3/4
5/8 3/4
5/8 3/4
3/4 7/8
3/4 7/8
7/8 7/8
7/8 1-1/8
7/8 1-1/8
1-1/8 1-1/8
1-1/8 1-1/8
Size inches O.D.
Hot gas
Liquid(3)
reheat(4)
1/2 5/8
1/2 5/8
1/2 3/4
5/8 3/4
5/8 7/8
5/8 7/8
7/8 7/8
3/4 7/8
3/4 1-1/8
7/8 1-1/8
7/8 1-1/8
1-1/8 1-1/8
1-1/8 1-1/8
1-1/8 1-1/8