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Installation
Table 2.
Pipe equivalent lengths
O.D.
(in.) Line
Globe
Size
Valve
1/2
9.0
5/8
12.0
7/8
15.0
1 1/8
22.0
1 3/8
28.0
Oil traps must be included every 20 ft in the vertical risers
and the refrigerant lines must be sloped in the horizontal
lines to ensure proper oil return to the compressor. An
inverted trap is required on the discharge line of the
remote condenser to help prevent oil and liquid from
flooding back to the compressor.
Notes: In the following tables:
•
The line sizes represent the correct size for individual
refrigeration circuits. Dual circuit units, (models 048D
to 120D), have two separate pairs of refrigeration lines,
one per compressor.
•
All pipe lengths are "Equivalent Length," which
accounts for the linear pipe length as well as
equivalent length of valves, elbows and Tee's as
shown in
Table 2, p.
18.
Table 3.
Recommended discharge line sizes for R407C
refrigerant
Model No./
Compressor to Condenser O.D. (in.)
Total Btu/h
Capacity
or less
50 ft
012/12,000
1/2
018/18,000
1/2
024/24,000
5/8
032/32,000
5/8
040/40,000
3/4
048/48,000
3/4
048D/48,000
5/8
060/60,000
3/4
072D/72,000
5/8
084D/84,000
3/4
120D/120,000
3/4
18
Equivalent Length (ft) of Straight Pipe
Angle
Valve
90º Elbow
5.0
0.9
6.0
1.0
8.0
1.5
12.0
1.8
15.0
2.4
or less
or less
100 ft
150 ft
5/8
5/8
5/8
5/8
5/8
3/4
3/4
3/4
3/4
7/8
7/8
7/8
5/8
3/4
7/8
1-1/8
3/4
3/4
7/8
7/8
7/8
1-1/8
45º Elbow
Tee Line
0.4
0.6
0.5
0.8
0.7
1.0
0.9
1.5
1.2
1.8
Table 4.
Recommended liquid line sizes for R407C
refrigerant (condenser to receiver)
Model No./
Compressor to Condenser O.D. (in.)
Total Btu/h
Capacity
or less
50 ft
012/12,000
1/2
018/18,000
1/2
024/24,000
1/2
032/32,000
1/2
040/ 40,000
5/8
048/48,000
5/8
048D/48,000
1/2
060/60,000
5/8
072D/72,000
1/2
084D/84,000
5/8
120D/120,000
5/8
Table 5.
Recommended suction line sizes for R407C
refrigerant
Model No./
or less
50 ft
Total Btu/h
Capacity
H
012 / 12,000
3/4
018 / 18,000
3/4
024 / 24,000
3/4
032 / 32,000
7/8
040 / 40,000
7/8
048 / 48,000
1-1/8
048D / 48,000
3/4
060 / 60,000
1-1/8
072D / 72,000
7/8
084D /84,000
1-1/8
Tee Branch
2.0
2.5
3.5
4.5
6.0
or less
or less
100 ft
150 ft
1/2
1/2
1/2
1/2
5/8
5/8
5/8
5/8
5/8
5/8
5/8
3/4
1/2
5/8
3/4
3/4
5/8
5/8
5/8
3/4
3/4
3/4
Line O.D. (in.)
or less
100 ft
V
H
V
3/4
3/4
3/4
3/4
3/4
3/4
3/4
7/8
7/8
7/8
7/8
3/4
7/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
3/4
7/8
7/8
1-1/8
1-1/8
1-1/8
7/8
7/8
3/4
1-1/8
1-1/8
1-1/8
AH-SVX008C-EN
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