Long Lineset Instructions

Page 5
Table 5 – HCFC-22 and HFC-410A Vapor Lines
UNIT
UNIT
TONS
SUCTION /
VAPOR LINE
SIZE
HCFC-22
PRESSURE
DROP PSI/100
FEET
HFC-410A
PRESSURE
DROP PSI/100
fEET
PREFERRED FOR
VERTICAL
VAPOR RISES
PREFERRED FOR
HORIZONTAL
RUNS
012 1
1/2” 13.0 7.8 X
5/8” 3.1 1.9 X
018 1.5
5/8” 6.5 3.9 X
3/4” 2.4 1.4 X
024 2
5/8” 12.0 7.2 X
3/4” 4.2 2.5 X
030 2.5
3/4” 6.0 3.6 X
7/8” 3.1 1.9 X
036 3
3/4” 8.5 5.1 X
7/8” 4.6 2.8 X
042 3.5
7/8” 5.9 3.5 X
1-1/8” 1.4 0.8 X
048 4
7/8” 7.8 4.7 X
1-1/8” 1.9 1.1 X
060 5
7/8” 12.0 7.2 X
1-1/8” 2.8 1.7 X
072 6
1-1/8” 4.0 2.4 X
1-3/8” 1.4 0.8 X
090 7.5
1-3/8” 2.0 1.2 X
1-5/8” 0.9 0.5 X
120 10
1-3/8” 2.4 1.4 X
1-5/8” 1.4 0.8 X
180 (2-COMP) 15
1-3/8” X 2 2.0 1.2 X
1-5/8” X 2 0.9 0.5 X
240 (2-COMP) 20
1-3/8” X 2 2.4 1.4 X
1-5/8” X 2 1.4 0.8 X
Table 6. Desirable Characteristics
Key System Consideration Desirable Characteristic Piping System Impact
Reliability Long Compressor Life
Poor oil management may shorten the life of the compressor.
Proper liquid refrigerant control is essential.
Performance
High Capacity
High energy efficiency
Effective Modulation
Low Sound Levels
Pressure drop in Refrigerant lines tends to decrease capacity and
increase power consumption.
High velocities can increase sound levels. Modulation often
depends on proper piping.
Cost Low Applied Cost
Amount of refrigerant charge, copper piping, accessories, and labor
used will impact the applied cost.