Wiring Diagrams - Bryant ZONE PERFECT TWO-ZONE Installation Instructions Manual

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Table 3 shows a temperature/ohm/voltage relationship to help aid in troubleshooting the Zone Perfect Two-Zone System. This table will evaluate
both the Duct/HP temperature sensor operation. Use a digital multimeter to perform the following:
To verify a sensor is good, disconnect both leads from the I/O board and measure the resistance through the sensor. Match ohm reading to table
and compare temperature reading on table to ambient temperature surrounding sensor (Accuracy should be ± 5-10 percent). Example: if 10.92k
ohms are measured, this equals approximately 73°F.
To verify if I/O board is normal, reattach sensor to I/O board, set meter to 5vdc, and measure voltage across terminal connections. Match voltage
reading to temperature reading in chart. The ambient temperature surrounding sensor should be ± 5-10 percent. Example: 2.61vdc is approximately
73°F.
TEMP °F OHMS
30 34,367
32 32,654
34 31,030
36 29,498
37 28,052
39 26,686
41 25,396
43 24,171
45 23,013
46 21,918
48 20,883
50 19,903
52 18,972
54 18,090
55 17,255
57 16,464
59 15,714
61 15,000
63 14,323
64 13,681
66 13,071
68 12,493
70 11,942
72 11,418
OUTDOOR
UNIT
Single-Stage Furnace
Two-Stage Furnace
Typical Fan Coil
FK4C Fan Coil
→ TABLE 3—TEMPERATURE/OHM/VOLTAGE RELATIONSHIP
VOLTS TEMP °F OHMS
3.873 73 10,921
3.828 75 10,449
3.781 77 10,000
3.734 79 9571
3.686 81 9164
3.637 82 8776
3.587 84 8407
3.537 86 8056
3.485 88 7720
3.433 90 7401
3.381 91 7096
3.328 93 6806
3.274 95 6530
3.220 97 6266
3.165 99 6014
3.111 100 5774
3.056 102 5546
3.000 104 5327
2.944 106 5117
2.889 108 4918
2.833 109 4727
2.777 111 4544
2.721 113 4370
2.666 115 4203
→ TABLE 4—WIRING DIAGRAM REFERENCE
SINGLE-SPEED
AIR CONDITIONER
Fig. 15
Fig. 16
Fig. 17
Fig. 18
VOLTS TEMP °F OHMS
2.610 117 4042
2.555 118 3889
2.500 120 3743
2.445 122 3603
2.391 124 3469
2.337 126 3340
2.284 127 3217
2.231 129 3099
2.178 131 2986
2.127 133 2878
2.075 135 2774
2.025 136 2675
1.975 138 2579
1.926 140 2488
1.878 142 2400
1.830 144 2315
1.784 145 2235
1.738 147 2157
1.692 149 2083
1.648 151 2011
1.605 153 1943
1.562 154 1876
1.521 156 1813
1.480 158 1752

WIRING DIAGRAMS

TWO-SPEED
AIR CONDITIONER
Fig. 19
Fig. 20
Fig. 21
Fig. 22
—11—
VOLTS TEMP °F OHMS
1.439 160 1693
1.400 162 1637
1.362 163 1582
1.324 165 1530
1.288 167 1480
1.252 169 1431
1.217 171 1385
1.183 172 1340
1.150 174 1297
1.117 176 1255
1.086 178 1215
1.055 180 1177
1.025 181 1140
0.996 183 1104
0.968 185 1010
0.940 187 1037
0.913 189 1005
0.887 190 974
0.862 — —
0.837 — —
0.813 — —
0.790 — —
0.767 — —
0.745 — —
SINGLE-SPEED TWO-SPEED
HEAT PUMP HEAT PUMP
Fig. 23
Fig. 24
Fig. 25
Fig. 26
VOLTS
0.724
0.703
0.683
0.663
0.645
0.626
0.608
0.591
0.574
0.558
0.542
0.527
0.512
0.497
0.483
0.470
0.457
0.444
—
—
—
—
—
—
Fig. 27
Fig. 28
Fig. 29
Fig. 30