Honeywell C7735A1000 Duct Air Temperature Sensor Installation Guide

Table of Contents

C7735A1000Duct Air Temperature Sensor

INSTALLATION INSTRUCTIONS

APPLICATION

The C7735A1000 Duct Air Temperature Sensor (DATS) is a duct-mounted temperature probe used to sense discharge air temperature in zoning applications for high and low-temperature limit protection. Alternatively, it is used with certain thermostats for delta-T diagnostics and IAQ control. For more on these applications, please see the installation instructions for those products.

Fig. 1. C7735A dimensions in. (mm).

INSTALLATION

When Installing this Product...

  1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
  2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application
  3. Installer must be a trained, experienced service technician
  4. After completing the installation, use these instructions to check out the product operation.

IMPORTANTDo not locate the DATS probe in a duct near the heat exchanger or strip heat, which can cause false temperature readings.It is recommended to set the high limit approx. 15°F below the furnace high limit. Some modern furnaces have low-high limit settings, so if the DATS is used with a zone panel, make sure the correct zone panel is selected for the equipment.The HZ221 zone panel is for heat pumps only and has a fixed high limit (120°F for heat pump. 160°F for aux heat) and low limit (45°F). The HZ311 has a fixed high limit (160°F) and low limit (45°F). The HZ322 & HZ432 zone panels have an adjustable high limit (110°F-180°F) and low limit (30°F-60°F).

  1. Assemble the DATS by attaching the metal sensor probe to the plastic cap. Insert the plate of the probe into the two tabs on the inside bottom of the cap. Then rotate the plate clockwise until it clicks into the single top tab.
  2.  Locate the DATS on the supply trunk between the bypass damper and the evaporator coil and/or heat exchanger. If a bypass damper is not used, locate the DATS between the zone dampers and the evaporator coil and/or heat exchanger. See Fig. 2.Fig. 2. DATS mounting location.
  3. Drill a 1/4 in. hole in the duct at the location selected for the sensor.
  4.  Attach wire using wire nuts and push them into the cover, then insert the probe into the hole drilled in step 2.5. Secure the DATS to the side of the duct, through the two mounting holes, with the screws supplied.
  5. Secure the DATS to the side of the duct, throughthe two mounting holes, with the screws supplied.IMPORTANTUse 18-22 gauge thermostat wire for shorter runs. For longer runs or when wiring near voltage, use shielded cable.
  6.  Run a wire to zone panel or thermostat. See zone panel or thermostat installation instructions.
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Table 1. DATS Resistance Cross Reference.

Temperature(°F) Resistance Temperature(°F) Resistance Temperature(°F) Resistance Temperature(°F) Resistance
32 33630 75 10514 118 3830 161 1582
33 32668 76 10253 119 3747 162 1552
34 317 37 77 10003 120 3666 163 1523
35 308 35 78 9754 121 3587 164 1494
36 299 62 79 9514 122 3510 165 1466
37 291 17 80 9281 123 34 35 166 1438
38 28298 81 9055 124 3362 167 1411
39 27505 82 8835 125 3290 168 1385
40 267 37 83 8621 126 32 21 169 1359
41 25993 84 8412 127 31 53 170 1334
42 25272 85 8210 128 3086 171 1309
43 24573 86 8013 129 3021 172 1285
44 23896 87 7821 130 2958 173 1261
45 23240 88 7634 131 2896 174 1238
46 22604 89 7453 132 2836 175 1215
47 21988 90 7276 133 2777 176 1193
48 21390 91 7104 134 27 20 177 1171
49 208 10 92 6937 135 2664 178 1150
50 202 48 93 6774 136 2609 179 1129
51 19703 94 6615 137 2555 180 1108
52 191 75 95 6461 138 2503 181 1088
53 18662 96 6311 139 24 52 182 1069
54 18165 97 6164 140 2402 183 1050
55 17683 98 6022 141 23 53 184 1031
56 17215 99 5883 142 2306 185 1012
57 167 61 100 5748 143 22 59 186 994
58 16320 101 5617 144 22 14 187 977
59 158 92 102 5488 145 21 70 188 959
60 15477 103 5363 146 21 26 189 943
61 15074 104 5242 147 2084 190 926
62 146 83 105 5123 148 2043 191 910
63 14303 106 5008 149 2002 192 894
64 139 34 107 4895 150 1963 193 878
65 13576 108 4786 151 1924 194 863
66 132 29 109 4679 152 1886 195 848
67 12891 110 4575 153 18 49 196 833
68 12563 111 4473 154 1813 197 819
69 12244 112 4374 155 17 78 198 805
70 119 35 113 4278 156 1744 199 791
71 11634 114 4183 157 1710 200 777
72 11342 115 4092 158 1677 — —
73 11058 116 4002 159 1645 — —
74 107 82 117 3915 160 1613 — —

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Resideo Technologies, Inc.1985 Douglas Drive North, Golden Valley, MN 554221-800-468-150269-1521EFS—03 M.S. Rev. 03-20 | Printed in the United States

© 2020 Resideo Technologies, Inc. All rights reserved. The Honeywell Home trademark is used under license from Honeywell International, Inc. This product is manufactured by Resideo Technologies, Inc. and its affiliates.

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