R407C Refrigerant
Table 34 R407C pressure/temperature chart for subcooling only (liquid measurements)
Temperature | Pressure Gauge | Temperature | Pressure Gauge | Temperature | Pressure Gauge | ||||||
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°F | °C | Psig | kPa | °F | °C | Psig | kPa | °F | °C | Psig | kPa |
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36.0 | 2.2 | 73 | 500 | 59.0 | 15.0 | 114 | 786 | 94.0 | 34.4 | 203 | 1402 |
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37.0 | 2.8 | 74 | 511 | 60.0 | 15.6 | 116 | 801 | 96.0 | 35.6 | 209 | 1444 |
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38.0 | 3.3 | 76 | 522 | 61.0 | 16.1 | 118 | 815 | 98.0 | 36.7 | 216 | 1488 |
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39.0 | 3.9 | 77 | 533 | 62.0 | 16.7 | 120 | 830 | 100.0 | 37.8 | 222 | 1532 |
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40.0 | 4.4 | 79 | 544 | 63.0 | 17.2 | 123 | 845 | 102.0 | 38.9 | 229 | 1578 |
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41.0 | 5.0 | 81 | 556 | 64.0 | 17.8 | 125 | 860 | 104.0 | 40.0 | 236 | 1624 |
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42.0 | 5.6 | 82 | 567 | 65.0 | 18.3 | 127 | 875 | 106.0 | 41.1 | 242 | 1671 |
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43.0 | 6.1 | 84 | 579 | 66.0 | 18.9 | 129 | 891 | 108.0 | 42.2 | 249 | 1720 |
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44.0 | 6.7 | 86 | 591 | 67.0 | 19.4 | 131 | 906 | 110.0 | 43.3 | 257 | 1769 |
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45.0 | 7.2 | 87 | 602 | 68.0 | 20.0 | 134 | 922 | 112.0 | 44.4 | 264 | 1819 |
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46.0 | 7.8 | 89 | 615 | 69.0 | 20.6 | 136 | 938 | 114.0 | 45.6 | 271 | 1870 |
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47.0 | 8.3 | 91 | 627 | 70.0 | 21.1 | 138 | 954 | 116.0 | 46.7 | 279 | 1922 |
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48.0 | 8.9 | 93 | 639 | 72.0 | 22.2 | 143 | 987 | 118.0 | 47.8 | 287 | 1975 |
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49.0 | 9.4 | 95 | 652 | 74.0 | 23.3 | 148 | 1021 | 120.0 | 48.9 | 294 | 2029 |
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50.0 | 10.0 | 96 | 664 | 76.0 | 24.4 | 153 | 1055 | 122.0 | 50.0 | 302 | 2085 |
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51.0 | 10.6 | 98 | 677 | 78.0 | 25.6 | 158 | 1090 | 124.0 | 51.1 | 310 | 2141 |
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52.0 | 11.1 | 100 | 690 | 80.0 | 26.7 | 163 | 1126 | 126.0 | 52.2 | 319 | 2198 |
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53.0 | 11.7 | 102 | 704 | 82.0 | 27.8 | 169 | 1163 | 128.0 | 53.3 | 327 | 2256 |
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54.0 | 12.2 | 104 | 717 | 84.0 | 28.9 | 174 | 1201 | 130.0 | 54.4 | 336 | 2315 |
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55.0 | 12.8 | 106 | 730 | 86.0 | 30.0 | 180 | 1239 | 132.0 | 55.6 | 345 | 2376 |
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56.0 | 13.3 | 108 | 744 | 88.0 | 31.1 | 185 | 1279 | 134.0 | 56.7 | 354 | 2437 |
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57.0 | 13.9 | 110 | 758 | 90.0 | 32.2 | 191 | 1319 | 136.0 | 57.8 | 363 | 2500 |
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58.0 | 14.4 | 112 | 772 | 92.0 | 33.3 | 197 | 1360 | 138.0 | 58.9 | 372 | 2563 |
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- | - | - | - | - | - | - | - | 140.0 | 60.0 | 381 | 2628 |
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NOTE
Use this table for subcooling calculation ONLY. See Table 33 for superheat or control adjustment.
8.1Calculating Subcooling
Example
Measure the liquid pressure (e.g., 200 psig). Find the liquid saturation temperature at that pressure on Table 34 (e.g., 93°F). Measure the temperature of the liquid line (e.g., 90°F). Subtract the actual temperature from the liquid saturation temperature to obtain the subcooling (e.g., 93 – 90 = 3°F). If the actual temperature is greater than the liquid saturation temperature, then there is no subcooling, and the fluid may be a mixture of liquid and vapor.
Why There Are Two R407C Temperature and Pressure Tables
R407C is a blend of refrigerants that exhibits a temperature “glide” of approximately 8 to 12°F (4 to 7°C. This “glide” is the difference between the liquid and vapor saturation temperatures at a given pressure. Use the correct table for the saturation temperature you need. Table 33 is for super- heat or operating controls. Table 34 is for subcooling only.
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