Honeywell C7735A1000 Bedienungsanleitung

® U.S. Registered Trademark

INSTALLATION INSTRUCTIONS

69- 1521- 2

C7735A1000 Discharge Air

Temperature Sensor

APPLICATION

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 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

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.

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.

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

INSTALLATION

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.

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.

Fig. 2. DATS mounting location.

M14926

4-1/8 (102)

3-7/8

(77)

3-3/4

(77)

1-1/4

(25)

ZONE DAMPERS

BY PASS DAMPER

PLACE SENSOR

INTHIS AREA.

DO NOT

PLACE

SENSOR IN

THIS AREA.

M14877

EVAPORATOR COIL

HEAT EXCHANGER

BLOWER

C7735A1000 DISCHARGE AIR TEMPERATURE SENSOR

69-1521-2 2

2. Drill a 1/4 in. hole in the duct at the location

selected for the sensor.

3. Remove the cover from the DATS case and insert

the probe into the hole drilled in step 2.

4. Secure the DATS to the side of the duct, through

the two mounting holes in the back of the case,

with the screws supplied.

IMPORTANT

Use normal 18-22 gauge thermostat wire for

shorter runs. For longer runs or when wiring

near voltage, use shielded cable.

5. Check the resistance across the sensor leads and

cross reference with Table 1.

6. Connect the two DATS wires, using the wire nuts

supplied, to wires that connect to the TL and TL

terminals on the TZ-3, MABS EZ-2, MABS EZ-4 or

to the ZMS and ZMS terminals on the EMM series

panels, through the wiring hole in the DATS case.

See Fig. 3.

7. Replace the cover on the DATS case.

8. Adjust the MAX Temp dial on the TZ-3 to the

appropriate high limit setting. This can be set

between 110°F and 160° F (43°C and 71°C). Note

that settings between the lines are approximate

settings. The cooling low limit is fixed at 40 °F

(4°C) on the TZ-3, Rev 2 and 3 panels. The TZ-3,

Rev 4 panel, can be set at either 40 °F (4°C) or

48 °F (9°C). See TZ-3 panel instructions for further

information.

9. Set the upper and lower limits on the EMM-3U

using DIP switches 5 and 6.

Fig. 3. DATS wiring to TZ-3 panel.

TROUBLESHOOTING

See Table 1 for readings in resistance for each temperature to determine if the DATS is reading the correct

temperature. To obtain the correct resistance measurement, remove the two wires from the wire nuts and measure the

resistance across the two wires.

C7735A WITH

COVER REMOVED

ZoneMAX

ZONING PANEL

M14879

When Zoning Panel LED is... It means... It is corrected when...

Flashing IDLE light five times on

initial power-up (TZ-3). No DATS is wired to the panel or

there is an open circuit. Circuit is closed. Note that the DATS

Sensor is optional and not required for the

TZ-3 to operate.

Flashing IDLE continuously (TZ-3).

Flashing system light (EMM-3).

Flashing purge light (EMM-3U).

A DATS failure or no sensor. Unhook the loads and verify the resistance

using step 5 of the Installation instructions.

Flashing HEAT light continuously. DATS has tripped on high temper-

ature limit and all stages of heating

are shut off.

Reset because delivered air temperature

drops 10ºF (-12°C) from MAX Temp setting

on the TZ-3 panel. 2.5-minute minimum

wait required on EMM series panels.

Flashing COOL light continuously DATS has tripped on low

temperature limit and all stages of

cooling are shut off.

Reset because delivered air temperature

rises 10ºF above fixed low temperature

setting of 40°F (4°C) on TZ-3, Rev 2 and 3

panels, or 40º and 48°F (4°C and 9°C) on

TZ-3, Rev 4 panels. 2.5-minute minimum

wait required on EMM series panels.

C7735A1000 DISCHARGE AIR TEMPERATURE SENSOR

3 69-1521-2

Table 1. DATS Resistance Cross Reference.

Temperature (°F) Resistance Temperature (°F) Resistance

32 33630 117 3915

33 32668 118 3830

34 31737 119 3747

35 30835 120 3666

36 29962 121 3587

37 29117 122 3510

38 28298 123 3435

39 27505 124 3362

40 26737 125 3290

41 25993 126 3221

42 25272 127 3153

43 24573 128 3086

44 23896 129 3021

45 23240 130 2958

46 22604 131 2896

47 21988 132 2836

48 21390 133 2777

49 20810 134 2720

50 20248 135 2664

51 19703 136 2609

52 19175 137 2555

53 18662 138 2503

54 18165 139 2452

55 17683 140 2402

56 17215 141 2353

57 16761 142 2306

58 16320 143 2259

59 15892 144 2214

60 15477 145 2170

61 15074 146 2126

62 14683 147 2084

63 14303 148 2043

64 13934 149 2002

65 13576 150 1963

66 13229 151 1924

67 12891 152 1886

68 12563 153 1849

69 12244 154 1813

70 11935 155 1778

71 11634 156 1744

72 11342 157 1710

73 11058 158 1677

74 10782 159 1645

75 10514 160 1613

76 10253 160 1582

77 10000 162 1552

78 9754 163 1523

79 9514 164 1494

69-1521-2 G.H. Rev. 9-01 www.honeywell.com/yourhome

C7735A1000 DISCHARGE AIR TEMPERATURE SENSOR

Printed in U.S.A. on recycled

paper containing at least 10%

post-consumer paper fibers.

Home and Building Control Home and Building Control

Honeywell Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario

M1V 4Z9

For Internet access: www.trolatemp.com

www.honeywell.com/yourhome/zoning/zoning_home.htm

For technical support, call 1-800-TAT-Temp (1-800-828-8367).

To download Zoning literature: http:hbctechlit.honeywell.com

80 9281 165 1466

81 9055 166 1438

82 8835 167 1411

83 8621 168 1385

84 8412 169 1359

85 8210 170 1334

86 8013 171 1309

87 7821 172 1285

88 7634 173 1261

89 7453 174 1238

90 7276 175 1215

91 7104 176 1193

92 6937 177 1171

93 6774 178 1150

94 6615 179 1129

95 6461 180 1108

96 6311 181 1088

97 6164 182 1069

98 6022 183 1050

99 5883 184 1031

100 5748 185 1012

101 5617 186 994

102 5488 187 977

103 5363 188 959

104 5242 189 943

105 5123 190 926

106 5008 191 910

107 4895 192 894

108 4786 193 878

109 4679 194 863

110 4575 195 848

111 4473 196 833

112 4374 197 819

113 4278 198 805

114 4183 199 791

115 4092 200 777

116 4002 — —

Table 1. DATS Resistance Cross Reference. (Continued)

Temperature (°F) Resistance Temperature (°F) Resistance

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