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34
Table 9 - Upflow Discharge Line Sizes for R410A (inches OD)
Circuit
Tons
Total Equivalent Length (ft)
25
50
75
100
125
150
175
200
225
250
275
300
10
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
B - ¾
B - ¾
B - ¾
B - ¾
B - ¾
B - ¾
B - ¾
B -
⅞
B -
⅞
B -
⅞
B -
⅞
B -
⅞
15
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A -
⅜
A - ½
A - ½
B - ¾
B - ¾
B -
⅞
B -
⅞
B -
⅞
B -
⅞
B -
⅞
B -
⅞
B -
⅞
B -
⅞
B -
1⅛
B -
1⅛
20
A -
⅜
A -
⅜
A -
⅜
A - ½
A - ½
A - ½
A - ½
A - ½
A - ½
A - ½
A -
⅝
A -
⅝
B - ¾
B -
⅞
B -
⅞
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅛
B - 1
⅛
B -
1⅛
B -
1⅜
B -
1⅜
25
A -
⅜
A -
⅜
A -
⅜
A - ½
A - ½
A - ½
A - ½
A - ½
A - ½
A - ½
A -
⅝
A -
⅝
B -
⅞
B -
⅞
B -
⅞
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅜
B -
1⅜
30
A - ½
A - ½
A - ½
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
B -
⅞
B -
⅞
B -
⅞
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅛
B -
1⅜
B -
1⅜
B -
1⅜
40
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
B -
1⅜
B -
1⅜
B -
1⅜
B -
1⅜
B -
1⅜
B -
1⅜
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
50
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
A - ¾
B -
1⅜
B -
1⅜
B -
1⅜
B -
1⅜
B -
1⅜
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
60
A - ¾
A - ¾
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
B -
1⅜
B -
1⅜
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
80
A - ¾
A - ¾
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
A -
⅞
B -
1⅜
B -
1⅜
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
1⅝
B -
2⅛
B -
2⅛
B -
2⅛
B -
2⅛
Calculating System Refrigerant and Oil Charge
To determine the approximate charge, first refer to Table 10 and establish the required charge for the condenser
and chiller. Values given in Table 10 are per circuit. Then refer to Table 11 to determine the charge required for
the field-installed piping per circuit. The approximate charge per circuit is therefore the sum of the values from
Table 10 and Table 11.
Table 10 – Combined Chiller and Remote Condenser Summer Refrigerant Charge
Refrigerant Charge (Lbs. of R-410A)
Refrigeration Circuit Capacity (tons)
10
15
20
25
30
40
50
60
80
Single-Circuit Chillers
15.3
22.2
30.2
37.2
44.3
59.4
79.6
109.0
136.1
Dual-Circuit Chillers
17.3
24.7
30.2
37.2
43.8
59.4
79.6
108.5
136.1
Table 11 - Field Piping R-410A Refrigerant Charge per 100 Feet of Run (Lbs.)
Line Size OD (inches)
⅜
½
⅝
¾
⅞
1⅛
1⅜
1⅝
2⅛
2⅝
Discharge Line
0.4
0.7
1.1
1.6
2.2
3.6
5.6
7.9
13.9
21.4
Liquid Line
3.7
6.8
11.0
16.4
22.8
36.7
57.4
81.2
142.1
219.5