Figure 12 Refrigerant Piping Diagram; Table 5 Pipe Length And Condenser Elevation Relative To Evaporator; Table 6 Equivalent Lengths For Various Pipe Fittings, Ft (M) - Emerson Liebert Prop Fan Condensing Unit Installation, Operation And Maintenance Manual

Figure 12 Refrigerant piping diagram

Evaporator
Suction Line Piping
Condensing Unit
Below Evaporator
Evaporator
Table 5 Pipe length and condenser elevation relative to evaporator
Nominal
System Size
Tons
1 or 1.5
2
3, 3.5, 5 or 8
Table 6 Equivalent lengths for various pipe fittings, ft (m)
Copper Pipe
OD, in. Elbow Copper
1/2
5/8
3/4
7/8
1-1/8
1-3/8
1-5/8
Refrigerant trap = Four times equivalent length of pipe per this table
Max. Equiv. Maximum PFH
Pipe Length Level Above
ft. (m) Evaporator, ft. (m)
50 (15) 40 (12)
100 (30) 40 (12)
150 (45) 50 (15)
90 Degree 90 Degree
Elbow Cast
0.8 (0.24) 1.3 (0.39)
0.9 (0.27) 1.4 (0.42)
1.0 (0.3) 1.5 (0.45)
1.45 (0.44) 1.8 (0.54)
1.85 (0.56) 2.2 (0.67)
2.4 (0.73) 2.9 (0.88)
2.9 (0.88) 3.5 (1.06)
Pitch down 1/2" (13mm) per 10 ft. (3m)
NOTE
When installing remote condensing units below the
NOTE
evaporator, the suction gas line should be trapped
When installing remote condensing units below the
with an inverted trap to the height of the evaporator.
evaporator, the suction gas line should be trapped with
This prevents refrigerant migration to the compres-
an inverted trap to the height of the evaporator . This
sors during off cycles. Maximum recommended verti-
prevents refrigerant migration to the compressors
cal level drop to condensing unit is 15 ft. (4.6m).
during off cycles . Maximum recommended vertical
level drop to condensing unit is 15 ft. (4.6m) .
Condensing
Unit
Condensing
Unit
Suction Line Piping
Condensing Unit Above Evaporator
Traps recommended at the base of riser
exceeding 5 ft (1.5m) and every 20 feet
(6m) of vertical rise.
Maximum PFH
Level Below
Evaporator, ft. (m)
15 (4.6)
15 (4.6)
15 (4.6)
45 Degree
Elbow Tee
0.4 (0.12) 2.5 (0.76)
0.5 (0.15) 2.5 (0.76)
0.6 (0.18) 2.5 (0.76)
0.8 (0.24) 3.6 (1.09)
1.0 (0.3) 4.6 (1.4)
1.3 (0.39) 6.4 (1.95)
1.6 (0.48) 7.2 (2.19)
15
See Table 5 for maximum
vertical rise recommendation
above evaporator.
Gate Globe
Valve Valve
0.26 (0.07) 7.0 (2.13)
0.28 (0.08) 9.5 (2.89)
0.3 (0.09) 12.0 (3.65)
0.36 (0.1) 17.2 (5.24)
0.48 (0.14) 22.5 (6.85)
0.65 (0.19) 32.0 (9.75)
0.72 (0.21) 36.0 (10.97)
Installation
Angle
Valve
4.0 (1.21)
5.0 (1.52)
6.5 (1.98)
9.5 (2.89)
12.0 (3.65)
16.0 (4.87)
19.5 (5.94)