Daikin RDT-135c Installation And Maintenance Manual page 43

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