Ambient Temp °F (C°) Subcooling °F (C°)
40 (4.4) 22 (12.0)
50 (10.0) 21 (11.7)
60 (15.6) 19 (10.8)
70 (21.1) 17 (9.3)
80 (26.7) 13 (7.2)
90 (32.2) 9 (5.0)
95 (35.0) 7 (3.9)
100 (37.8) 5 (2.9)
105 (40.6) 3 (1.8)
110 (43.3) 1 (0.7)
125 (51.7) 0
DPN002411, Rev. 7
Table 5.10 Target subcooling for ambient outdoor temperature (continued)
8. As head pressure builds, the variable fan speed controlled condenser fan begins rotating. The
fan will run at full speed when sufficient head pressure is developed.
Pressure Psig (Bar) R407C
1
°F (°C) R410A
1
°F (°C) R22 °F (°C)
170 (11.7) 81.5 (27.5) 59.8 (15.4) 90.6 (32.6)
180 (12.4) 85.1 (29.5) 63.1 (17.3) 94.3 (34.6)
190 (13.1) 88.6 (31.5) 66.3 (19.1) 97.9 (36.6)
200 (13.8) 92.0 (33.3) 69.5 (20.8) 101.4 (38.6)
210 (14.5) 95.2 (35.1) 72.5 (22.5) 104.7 (40.4)
220 (15.2) 98.3 (36.8) 75.4 (24.1) 108.0 (42.2)
230 (15.9) 101.4 (38.5) 78.2 (25.7) 111.1 (44.0)
240 (16.6) 104.3 (40.2) 80.9 (27.2) 114.2 (45.7)
250 (17.2) 107.2 (41.8) 83.6 (28.7) 117.1 (47.3)
260 (17.9) 109.9 (43.3) 86.2 (30.1) 120.0 (48.9)
270 (18.6) 112.6 (44.8) 88.7 (31.5) 122.8 (50.4)
280 (19.3) 115.3 (46.3) 91.1 (32.8) 125.5 (52.0)
290 (20.0) 117.8 (47.7) 93.5 (34.2) 128.2 (53.4)
300 (20.7) 120.3 (49.1) 95.8 (35.5) 130.8 (54.9)
310 (21.4) 122.8 (50.4) 98.1 (36.7) 133.3 (56.3)
320 (22.1) 125.2 (51.8) 100.3 (38.0) 135.8 (57.7)
330 (22.8) 127.5 (53.1) 102.5 (39.2) 138.2 (59.0)
340 (23.4) 129.8 (54.3) 104.6 (40.3) 140.6 (60.3)
350 (24.1) 132.1 (55.6) 106.7 (41.5) 142.9 (61.6)
360 (24.8) 134.3 (56.8) 108.7 (42.6) 145.2 (62.9)
370 (25.5) 136.4 (58.0) 110.7 (43.7) 147.4 (64.1)
380 (26.2) 138.6 (59.2) 112.7 (44.8) 149.6 (65.4)
Table 5.11 Liquid pressures and temperatures
Vertiv | Liebert® MC™ Installer/User Guide | 81
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