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Unitary Products Group
9
TABLE 7: LIQUID LINES
Model Designation
Nominal
Capacity (Tons)
Refrigerant Flow
Rate (Lbs.
/
Min.
)
Copper Tubing
(Inches,
O.
D.
)
Refrigerant
Liquid Velocity
(Ft.
/
Min.
)
Friction Loss
(PSI/
100 Ft.
)
HA300
System #1
Full Capacity
25
80
5/8
500
14.2
7/8
265
3.4
1 1/8
156
1.0
HB360
System #1
Full Capacity
15
47
5/8
330
7.9
7/8
159
1.4
1 1/8
100
0.8
System #2
Full Capacity
15
47
5/8
330
7.9
7/8
159
1.4
1 1/8
100
0.8
HB480
System #1
Full Capacity
20
64
5/8
440
13.2
7/8
212
2.3
1 1/8
90
0.6
System #2
Full Capacity
20
64
5/8
440
13.2
7/8
212
2.3
1 1/8
90
0.6
HB600
System #1
Full Capacity
25
76
5/8
400
8.5
7/8
265
3.4
1 1/8
156
1.0
System #2
Full Capacity
25
76
5/8
400
8.5
7/8
265
3.4
1 1/8
156
1.0
TABLE 8: R-22 LINE CHARGE
*
LI
NE SET, O.D.
O.D., (I
NCHES)
REFRI
GERANT, LB/FT
LI
QUI
D
7/8
0.236
SUCTI
ON
1 5/8
0.019
2 1/8
0.033
*
Charges based on 40 F suction temperature and 105 F liquid temperature.
Type “L” copper tubing.
NOTE: Add the operating charge of the condensing unit, the evaporator coil and the refrigerant lines to determine the total refrigerant
charge of the system.
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