Bard W18HB-A Installation Instructions Manual

Also see for W18HB-A: Installation instructions

Manual 2100-703Page 26 of 40Checking Temperature Sensor OutsideUnit Circuit1. Disconnect temperature sensor from board andfrom outdoor coil.2. Use an ohmmeter to measure the resistance of thesensor. Also use ohmmeter to check for short oropen.3. Check resistance reading to chart of resistance.Use sensor ambient temperature. (Tolerance of partis ± 10%.)4. If sensor resistance reads very low, sensor isshorted and will not allow proper operation of theheat pump control.5. If sensor is out of tolerance, shorted, open or readsvery low ohms, it should be replaced.TABLE 9Temperature F vs. Resistance R of Temperature SensorF R F R F R F R-25.0 196871 13.0 56985 53.0 19374 89.0 7507-24.0 190099 14.0 55284 52.0 18867 90.0 7334-23.0 183585 15.0 53640 53.0 18375 91.0 7165-22.0 177318 16.0 52051 54.0 17989 92.0 7000-21.0 171289 17.0 50514 55.0 17434 93.0 6840-20.0 165487 18.0 49028 56.0 16984 94.0 6683-19.0 159904 19.0 47590 57.0 16547 95.0 6531-18.0 154529 20.0 46200 58.0 16122 96.0 6383-17.0 149355 21.0 44855 59.0 15710 97.0 6239-16.0 144374 22.0 43554 60.0 15310 98.0 6098-15.0 139576 23.0 42295 61.0 14921 99.0 5961-14.0 134956 24.0 41077 62.0 14544 100.0 5827-13.0 130506 25.0 39898 63.0 14177 101.0 5697-12.0 126219 26.0 38757 64.0 13820 102.0 5570-11.0 122089 27.0 37652 65.0 13474 103.0 5446-10.0 118108 28.0 36583 66.0 13137 104.0 5326-9.0 114272 29.0 35548 67.0 12810 105.0 5208-8.0 110575 30.0 34545 68.0 12492 106.0 5094-7.0 107010 31.0 33574 69.0 12183 107.0 4982-6.0 103574 32.0 32634 70.0 11883 108.0 4873-5.0 100260 33.0 31723 71.0 11591 109.0 4767-4.0 97064 34.0 30840 72.0 11307 110.0 4663-3.0 93981 35.0 29986 73.0 11031 111.0 4562-2.0 91008 36.0 29157 74.0 10762 112.0 4464-1.0 88139 37.0 28355 75.0 10501 113.0 43670.0 85371 38.0 27577 76.0 10247 114.0 42741.0 82699 39.0 26823 77.0 10000 115.0 41822.0 80121 40.0 26092 78.0 9760 116.0 40933.0 77632 41.0 25383 79.0 9526 117.0 40064.0 75230 42.0 24696 80.0 9299 118.0 39215.0 72910 43.0 24030 81.0 9077 119.0 38386.0 70670 44.0 23384 82.0 8862 120.0 37577.0 68507 45.0 22758 83.0 8653 121.0 36788.0 66418 46.0 22150 84.0 8449 122.0 36019.0 64399 47.0 21561 85.0 8250 123.0 352610.0 62449 48.0 20989 86.0 8057 124.0 345211.0 60565 49.0 20435 87.0 786912.0 58745 50.0 19896 88.0 7686