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Site Preparation
12
2.3 Refrigerant Planning Values
Planning for the refrigerant requirements of the completed system is the addition of the charges from
Indoor Unit, Condenser (including Lee-Temp receiver, if used) and the interconnecting piping.
Tables 3 and 4 provide the approximate charge required for the condensers and the interconnecting
piping. Consult indoor unit manuals for indoor unit charge requirements.
These values can be used for obtaining adequate refrigerant for the system, but should not be used for
final charging. Consult indoor unit manual for charging procedures.
Table 3 R-22 and R-407C refrigerant required, approximate
Standard
Condenser
Models
Approximate R-22 Refrigerant Needed Approximate R-407C Refrigerant Needed
Single Circuit
lb (kg)
Dual Circuit
lb/circuit (kg/circuit)
Single Circuit
lb (kg)
Dual Circuit
lb/circuit (kg/circuit)
FSC or
VFD
Lee-Temp
(includes
receiver)
FSC or
VFD
Lee-Temp
(includes
receiver)
FSC or
VFD
Lee-Temp
(includes
receiver)
FSC or
VFD
Lee-Temp
(includes
receiver)
83 5 (2.3) 27 (12.3) 3 (1.4) 15 (6.8) 5 (2.3) 26 (11.8) 3 (1.4) 15 (6.8)
104 8 (3.6) 39 (17.7) 7 (3.2) 21 (9.5) 8 (3.6) 37 (16.8) 7 (3.2) 20 (9.0)
165 15 (6.8) 53 (24.0) 5 (2.3) 27 (12.3) 15 (6.8) 50 (22.7) 5 (2.3) 26 (11.8)
205 20 (9.1) 76 (34.5) 7 (3.2) 38 (17.2) 19 (8.6) 72 (32.7) 7 (3.2) 36 (16.3)
251 19 (8.6) 75 (34.0) 10 (4.6) 38 (17.2) 18 (8.2) 71 (32.23) 10 (4.6) 36 (16.3)
308 29 (13.2) 113 (51.3) 11 (5.0) 58 (26.3) 28 (12.7) 107 (48.5) 11 (5.0) 55 (24.9)
415 54 (24.5) 182 (82.6) 15 (6.8) 75 (34.0) 51 (23.1) 173 (78.4) 15 (6.8) 71 (32.2)
510 72 (32.7) N/A 30 (13.6) 149 (67.6) 68 (30.8) N/A 29 (13.2) 142 (64.4)
616 N/A 267 (121.3) 27 (12.3) 113 (51.3) N/A 254 (115.2) 26 (11.8) 108 (49.0)
830 N/A N/A 30 (13.6) 149 (67.6) N/A N/A 29 (13.2) 142 (64.4)
1010 N/A N/A 60 (27.2) 154 (69.9) N/A N/A 57 (25.9) 147 (66.7)
Quiet-Line Condenser Models
63 N/A 39 (17.7) N/A 21 (9.5) N/A 37 (16.8) N/A 20 (9.1)
119 N/A 50 (22.7) N/A 27 (12.3) N/A 48 (21.8) N/A 26 (11.8)
127 N/A 76 (34.5) N/A 38 (17.2) N/A 72 (32.6) N/A 36 (16.3)
143 N/A 126 (57.2) N/A 64 (29.0) N/A 120 (54.5) N/A 61 (27.7)
214 N/A 161 (73.0) N/A 81 (36.7) N/A 153 (69.4) N/A 77 (34.9)
286 N/A 196 (88.9) N/A 125 (56.7) N/A 186 (84.4) N/A 119 (54.0)
409 N/A N/A N/A 129 (58.5) N/A N/A N/A 125 (55.8)
572 N/A N/A N/A 196 (88.9) N/A N/A N/A 186 (84.4)
Table 4 Interconnecting piping refrigerant charge
Line Size,
O.D., in.
R-22, lb/100 ft. (kg/30m) R-407C, lb/100 ft. (kg/30m)
Liquid Line Hot Gas Line Liquid Line Hot Gas Line
3/8 3.8 (1.7) — 3.7 (1.7) —
1/2 7.3 (3.3) — 6.9 (3.1) —
5/8 11.7 (5.3) 2.1 (1.0) 11.0 (5.0 2.2 (1.0)
3/4 16.6 (7.5) 3.0 (1.4) 15.7 (7.1) 3.1 (1.3)
7/8 24.4 (11.1) 4.4 (2.0) 23.0 (10.4) 4.5 (1.9)
1-1/8 41.4 (18.9) 7.8 (3.5) 39.3 (17.8) 7.8 (3.5)
1-3/8 63.3 (28.7) 11.8 (5.4) 59.8 (27.1 11.8 (5.4)
1-5/8 — 16.7 (7.6) — 16.7 (7.6)