Honeywell C7735A1000 Duct Air Temperature Sensor Installation Guide
- June 6, 2024
- Honeywell
Table of Contents
C7735A1000
Duct 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...
- Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
- Check the ratings given in the instructions and on the product to make sure the product is suitable for your application
- Installer must be a trained, experienced service technician
- After completing the installation, use these instructions to check out the product operation.
IMPORTANT
Do 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).
-
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.
-
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.**** -
Drill a 1/4 in. hole in the duct at the location selected for the sensor.
-
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.
-
Secure the DATS to the side of the duct, through
the two mounting holes, with the screws supplied.
IMPORTANT
Use 18-22 gauge thermostat wire for shorter runs. For longer runs or when wiring near voltage, use shielded cable.
-
Run a wire to zone panel or thermostat. See zone panel or thermostat installation instructions.
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| —| —
Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
69-1521EFS—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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