6 sensors in a Sundez SDDC heat pump
Important: This is excluding the exhaust gas temperature sensor which has 50K.
5K sensors (#1-#5):
- Sensor for water inlet temperature. (inlet means goes into heat pump) ;
- Sensor for water outlet temperature, (outlet means leave heat pump) ;
- Sensor for domestic hot water temperature, which install in a hot water tank when DHW function is used;
- Sensor for defrost, which installed in a sensor pocket that attached to the evaporator (fin-tube air heat exchanger);
- Sensor for ambient temperature, (at the back of the heat pump);
Refer to below specification of a 5K sensor which is used:
| 5K sensor | |||||
| T(℃) | R(KΩ) | T(℃) | R(KΩ) | T(℃) | R(KΩ) |
| -30 | 63.7306 | 14 | 7.7643 | 58 | 1.5636 |
| -29 | 60.3223 | 15 | 7.4506 | 59 | 1.5142 |
| -28 | 57.1180 | 16 | 7.1813 | 60 | 1.4856 |
| -27 | 54.1043 | 17 | 6.8658 | 61 | 1.4206 |
| -26 | 51.2686 | 18 | 6.5934 | 62 | 1.3763 |
| -25 | 48.5994 | 19 | 6.3333 | 63 | 1.3336 |
| -24 | 46.0860 | 20 | 6.0850 | 64 | 1.2923 |
| -23 | 43.7182 | 21 | 5.8479 | 65 | 1.2526 |
| -22 | 41.4868 | 22 | 5.6213 | 66 | 1.2142 |
| -21 | 39.3833 | 23 | 5.4048 | 67 | 1.1771 |
| -20 | 37.3992 | 24 | 5.1978 | 68 | 1.1413 |
| -19 | 35.5274 | 25 | 5.0000 | 69 | 1.1008 |
| -18 | 33.7607 | 26 | 4.8108 | 70 | 1.0734 |
| -17 | 32.0927 | 27 | 4.6298 | 71 | 1.0412 |
| -16 | 30.5172 | 28 | 4.4586 | 72 | 1.0100 |
| -15 | 29.0286 | 29 | 4.2909 | 73 | 0.9800 |
| -14 | 27.6216 | 30 | 4.1323 | 74 | 0.9508 |
| -13 | 26.2913 | 31 | 3.9804 | 75 | 0.9228 |
| -12 | 25.0330 | 32 | 3.8349 | 76 | 0.8957 |
| -11 | 23.8424 | 33 | 3.6955 | 77 | 0.8695 |
| -10 | 22.7155 | 34 | 3.5620 | 78 | 0.8441 |
| -9 | 21.6486 | 35 | 3.4340 | 79 | 0.8196 |
| -8 | 20.6380 | 36 | 3.3119 | 80 | 0.7959 |
| -7 | 19.6806 | 37 | 3.1937 | 81 | 0.7730 |
| -6 | 18.7732 | 38 | 3.0809 | 82 | 0.7508 |
| -5 | 17.9129 | 39 | 2.9727 | 83 | 0.7295 |
| -4 | 17.0970 | 40 | 2.8688 | 84 | 0.7086 |
| -3 | 16.3230 | 41 | 2.7692 | 85 | 0.6885 |
| -2 | 15.5886 | 42 | 2.6735 | 86 | 0.6690 |
| -1 | 14.8713 | 43 | 2.5816 | 87 | 0.6502 |
| 0 | 14.2293 | 44 | 2.4936 | 88 | 0.6320 |
| 1 | 13.6017 | 45 | 2.4097 | 89 | 0.6144 |
| 2 | 13.0057 | 46 | 2.3276 | 90 | 0.5973 |
| 3 | 12.4390 | 47 | 2.2491 | 91 | 0.5808 |
| 4 | 11.9011 | 48 | 2.1739 | 92 | 0.5647 |
| 5 | 11.3894 | 49 | 2.1016 | 93 | 0.5492 |
| 6 | 10.9028 | 50 | 2.0321 | 94 | 0.5342 |
| 7 | 10.4399 | 51 | 1.9656 | 95 | 0.5196 |
| 8 | 9.9995 | 52 | 1.9016 | 96 | 0.5088 |
| 9 | 9.5802 | 53 | 1.8399 | 97 | 0.4919 |
| 10 | 9.1810 | 54 | 1.7804 | 98 | 0.4786 |
| 11 | 8.8008 | 55 | 1.7232 | 99 | 0.4650 |
| 12 | 8.4395 | 56 | 1.6680 | 100 | 0.4533 |
| 13 | 8.0934 | 57 | 1.6140 | ||
50K sensor （#6）:
6. Sensor for exhaust gas temperature, which installed at the exhaust gas pipe of compressor outlet, this sensor has a different ;
2024/6/4