SCS C
ONDENSER
IOM
M
ANUAL
15
higher pressures than R407C, which must be considered when checking the operating temperatures/pressures while
charging or troubleshooting the system.
2.7.2
Estimating Refrigerant Charge
When charging a system with R407C or R410A refrigerant it will be necessary to weigh in the refrigerant. Calculate
the amount of refrigerant needed by adding the amount of refrigerant required for the A/C unit (shown in the A/C
unit IOM provided separately) plus the refrigerant for the condenser (Table 5 and Table 6) plus the refrigerant piping
(Table 7).
Table 5 and Table 6 may be used to estimate the minimum amount of R407C or R410A refrigerant needed to charge
SCS or SCS-MC condensers by model number. In cases of dual circuited condensers, divide the total weight (lb) shown
by 2 to determine the amount of refrigerant needed for each circuit. The values shown in Table 5 and Table 6 are
conservative for the purpose of preventing the system from being overcharged.
Table 5. SCS Condenser Refrigerant Charge Weights (lb)
SCS Model
Number
R407C Charge
(Condenser
Less Receiver)
R407C Charge
(Condenser with
Receiver)
R410A Charge
(Condenser
Less Receiver)
R410A Charge
(Condenser with
Receiver)
-20°F Ambient &
Higher
-30°F Ambient
-20°F Ambient &
Higher
-30°F Ambient
012-S
0.6
2.7
0.5
2.6
018-S
0.6
2.7
0.5
2.6
024-S
1.3
5.4
1.0
5.2
036-S
1.9
8.1
1.5
7.8
060-S
2.8
12.2
2.2
11.7
060-D*
2.8
12.2
2.2
11.7
096-S
3.6
15.7
2.8
15.1
096-D*
3.6
15.7
2.8
15.1
120-S
5.4
23.6
4.2
22.7
120-D*
5.4
23.6
4.2
22.7
144-S
7.2
31.4
5.6
30.2
144-D*
7.2
31.4
5.6
30.2
192-S
8.2
35.9
6.4
34.5
192-D*
8.2
35.9
6.4
34.5
252-S
8.2
35.9
6.4
34.5
252-D*
8.2
35.9
6.4
34.5
276-D*
12.4
53.8
9.7
51.7
312-D*
12.4
53.8
9.7
51.7
447-D*
16.5
71.8
12.9
69.0
525-D*
18.4
80.1
14.4
77.0
597-D*
18.4
80.1
14.4
77.0
683-D*
24.6
106.9
19.2
102.8
940-D*
32.6
141.9
25.5
136.5
1366-D*
49.1
213.7
38.4
205.6
* Dual refrigeration circuits.
