IM 738-2
41
Mechanical Installation:
RFS/RCS Permanent Split Systems
* Condenser pumpdown capacity is the total charge for both circuits and is based on volume between condenser
entrance and liquid line solenoid at 90°F, 90% full
* DX coil configuration (S = Standard, L = Large) is identified by the 8th digit of the RPS/RDT or RFS model number, found on the unit nameplate. For example,
DX = L for unit model number RFSO6OCLY.
* Condenser pumpdown capacity is the total charge for both circuits and is based on volume between condenser entrance and liquid line solenoid at 90º F,
90% full.
Table 15: Approximate 407C refrigerant charge per circuit, 015C to 040C
Unit size
Base charge
lbs per circuit (less DX coil)
Evaporator coil
(lbs/CKT/coil row)
Additional charge for heat section
additional length
Condenser pumpdown
capacity*
(lbs)
Circuit 1
Circuit 2
Circuit 1
Circuit 2
015C to 018C
10
16
0.7/1.4
.5
1
45
020C
10
16
0.7/1.4
1
1
45
025C
21
20
1.6
1
1
68
030C
21
19
1.6
1
1
68
036C
29
29
1.6
1
1
101
040C
30
29
1.6
1
1
101
Table 16: Approximate R407C refrigerant charge per circuit, 045C to 135C
Unit size
Base charge
lbs per circuit (less DX coil)
DX coil charge
lbs per circuit per coil row
Condenser pumpdown
capacity**
(lbs)
RPS
RDT
DX=S*
DX=L*
Circuit #1
Circuit #2
Circuit #1
Circuit #2
045C
31
30
31
26
2.3
—
103
050C
31
30
32
31
2.3
2.8
103
060C
32
31
32
31
2.3
2.8
103
070C
36
36
37
37
2.3
2.8
127
075C
36
36
37
37
2.3
2.8
127
080C
37
37
34
35
3.8
4.3
134
090C
42
43
41
43
3.8
4.3
152
105C
46
42
41
44
4.5
6.0
198
115C
54
55
55
58
4.5
6.0
198
125C
—
55
—
60
—
6.0
198
135C
—
55
—
60
—
6.0
198
Table 17: Weight of refrigerant in copper lines (pounds per 100 feet of Type L tubing)
O.D. line size
Vol. per 100 ft.
in cubic feet
Weight of refrigerant, lbs./100 feet
Liquid @100°F
Hot gas@120 °F cond.
Suction gas (superheat to 85°F)
R22
R407
R22
R407
30 °F
40 °F
R22
R407
R22
R407
3/8"
0.054
3.84
3.64
0.20
0.46
0.052
0.047
0.077
0.071
1/2"
0.100
7.12
6.74
0.37
0.85
0.096
0.088
0.143
0.132
5/8"
0.162
11.53
10.92
0.61
1.38
0.156
0.142
0.232
0.214
7/8"
0.336
23.92
22.65
1.26
2.87
0.324
0.294
0.480
0.444
1 1/8"
0.573
40.80
38.62
2.14
4.89
0.552
0.501
0.819
0.756
1 3/8"
0.872
62.09
58.77
3.26
7.44
0.840
0.763
1.247
1.151
1 5/8"
1.237
88.07
83.37
4.63
10.55
1.191
1.082
1.769
1.633
2 1/8"
2.147
152.87
144.71
8.03
18.31
2.068
1.879
3.070
2.834
2 5/8"
3.312
235.81
223.23
12.38
28.25
3.189
2.898
4.736
4.372
3 1/8"
4.728
336.63
318.67
17.68
40.33
4.553
4.137
6.761
6.241
3 5/8”
6.398
455.54
431.23
23.92
54.57
6.161
5.598
9.149
8.445
4 1/8"
8.313
591.89
560.30
31.08
70.91
8.005
7.274
11.888
10.973
Summary of Contents for RDT-135c
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