C7735A1000 Discharge Air
Temperature Sensor
INSTALLATION INSTRUCTIONS
APPLICATION
INSTALLATION
The C7735A1000 Discharge Air Temperature Sensor
(DATS) is a duct-mounted temperature probe that
provides capacity control of heating and cooling
equipment. The DATS is used only with zoning solutions,
including TZ-3, MABS EZ-2 and MABS EZ-4, and EMM-
3 and EMM-3U control panels. Mounted in the supply air
duct, the DATS senses the delivered air temperature and
cuts off the heating or cooling when the delivered air
temperature goes above or below normal operating
limits.
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous 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 installation, use these instructions
to check out the product operation.
When either limit setting is reached, the appropriate heat
or cool light emitting diode (LED) flashes on the TZ-3 or
EMM series panels, indicating that heating or cooling is
shut off. The call still exists and heated or cooled air is
still being supplied to the calling zones. Once the
delivered air temperature drops ten degrees for heating,
or rises ten degrees for cooling, the heating or cooling
equipment is brought back on. The ten-degree
IMPORTANT
Do not locate the DATS probe in a duct near the
heat exchanger or strip heat, which can cause
false temperature readings.
1. 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.
differential provides adequate minimum time-off to avoid
damaging the equipment. EMM series has a 2.5 minute
timer as equipment protection.
The location of the DATS is critical; it should not be
placed in line-of-sight of the heat exchanger or cooling
coil because the DATS could activate prematurely. It
should also be located before the bypass damper, when
applicable. DATS dimensions are shown in Fig. 1.
ZONE DAMPERS
The DATS requires only two wires. Normal 18 to 22
gauge thermostat wire is used for shorter runs. For
longer runs or when wiring near voltage, shielded cable
is used.
BY PASS DAMPER
PLACE SENSOR
INTHIS AREA.
DO NOT
PLACE
EVAPORATOR COIL
SENSOR IN
THIS AREA.
1-1/4
4-1/8 (102)
(25)
HEAT EXCHANGER
3-3/4
(77)
3-7/8
(77)
BLOWER
M14877
M14926
Fig. 2. DATS mounting location.
Fig. 1. C7735A dimensions in in. (mm).
® U.S. Registered Trademark
Copyright © 2001 Honeywell •
• All Rights Reserved
69- 1521- 2
Download from Www.Somanuals.com. All Manuals Search And Download.
C7735A1000 DISCHARGE AIR TEMPERATURE SENSOR
Table 1. DATS Resistance Cross Reference.
Temperature (°F)
Resistance
33630
32668
31737
30835
29962
29117
28298
27505
26737
25993
25272
24573
23896
23240
22604
21988
21390
20810
20248
19703
19175
18662
18165
17683
17215
16761
16320
15892
15477
15074
14683
14303
13934
13576
13229
12891
12563
12244
11935
11634
11342
11058
10782
10514
10253
10000
9754
Temperature (°F)
117
Resistance
3915
3830
3747
3666
3587
3510
3435
3362
3290
3221
3153
3086
3021
2958
2896
2836
2777
2720
2664
2609
2555
2503
2452
2402
2353
2306
2259
2214
2170
2126
2084
2043
2002
1963
1924
1886
1849
1813
1778
1744
1710
1677
1645
1613
1582
1552
1523
1494
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
160
162
163
164
9514
3
69-1521-2
Download from Www.Somanuals.com. All Manuals Search And Download.
C7735A1000 DISCHARGE AIR TEMPERATURE SENSOR
Table 1. DATS Resistance Cross Reference. (Continued)
Temperature (°F)
Resistance
9281
9055
8835
8621
8412
8210
8013
7821
7634
7453
7276
7104
6937
6774
6615
6461
6311
6164
6022
5883
5748
5617
5488
5363
5242
5123
5008
4895
4786
4679
4575
4473
4374
4278
4183
4092
4002
Temperature (°F)
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
—
Resistance
1466
1438
1411
1385
1359
1334
1309
1285
1261
1238
1215
1193
1171
1150
1129
1108
1088
1069
1050
1031
1012
994
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
977
959
943
926
910
894
878
863
848
833
819
805
791
777
—
For technical support, call 1-800-TAT-Temp (1-800-828-8367).
To download Zoning literature: http:hbctechlit.honeywell.com
Home and Building Control Home and Building Control
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
69-1521-2 G.H. Rev. 9-01
Download from Www.Somanuals.com. All Manuals Search And Download.
|