Honeywell C7089 User manual

Honeywell

C7089

OutdoorSensor

(USEWITHTH8000ANDTH7000THERMOSTATS)

APPLICATION

This C7089 Outdoor Sensor is used with theTH8000 and

TH7000 Thermostat families.

SPECIFICATIONS

Operating Ambient Temperature Range:

-40 to 120°F (-40 to 49°C).

Display Range:

-40 to 127°F (-40 to 53°C).

Sensor Accuracy:

+/-1.5°F at 70°F (+/-.84 at 21°C)

Operating Relative Humidity:

5% to 95% non-condensing.

Dimensions in in. (mm):

2-1/4 (57) x 3/8 (10) with 60 (1524) leadwires.

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 end on

the product to make sure the product is suitable for

your application.

3. [ustaller must be a trained, experienced service

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

CAUTION

Electrical Shock Hazard.

Dan cause electrical shock or equipment

damage.

Disconnect power supply before connecting

wiring.

Locationand Mounting(Fig.1)

Mount the sensor where:

• cannot tamper with settings.

• there is good air circulation.

• it can measure true outdoor ambient temperature.

• surface is flat.

• wire distance between C7089 and thermostat is less

than 200 feet.

Do not mount the sensor:

• in direct sunlight.

• where hot or cold air blows on the sensor. Discharge

line from an outdoor compressor unit, vent or fan

causes inaccurate temperature readings.

• where snow, ice or debris can cover it.

Use the following steps to mount the sensor:

1. Remove the sensor from the mounting clip.

2. Mark the area on the location selected for

mounting the sensor mounting clip.

3. Mount the clip.

MTS14

Fig. 1. Typical locations for outdoor sensor.

@U.S. Registered Trademark

C7089OUTDOOR SENSOR

Wiring

CAUTION

Electrical Interference (Noise) Hazard.

Can cause erratic system operation.

Keep wiring at least one foot away from large

inductive loads such as motors, line starters,

lighting ballasts and large power distribution

panels.

Use shielded cable to reduce interference when

rerouting is not possible.

IMPORTANT

Erratic temperature readings from a sensor can

occur as a result of any of the wiring practices

described below. Avoid these practices to

assure correct operation. Use shielded cable to

reduce interference if rerouting of sensor widng

is not possible

-- Be sure wires have a cable separate from the

thermostat cable.

-- Do not route temperature sensor wiring with

building power wiring, next to control contactors

or near light dimming circuits, electric motors or

welding equipment.

-- Avoid poor wiring connections.

-- Avoid intermittent or missing building earth

ground.

CAUTION

Electrical Shock Hazard.

Can cause electrical shock or equipment

damage.

Disconnect power supply before connecting

wiring.

Wiring must comply with applicable codes, ordinances

and regulations:

1. Wire the C7089 Outdoor Sensor to $1 and $2

terminals on the thermostat. If leadwire provided

with C7089 is not long enough (60 in.), run a cable

to a hole at C7089 location.

a. Using color-coded, 18-gauge thermostat wire is

recommended. For example of general wiring

of C7089, see Fig. 2.

b. Pigtail wiring can be used.

2. Mount C7089 in its mounting clip.

3. Plug wiring hole using nonhardening caulk or putty.

WIRING HOLE

THROUGH

Z_STRUCTURE

z_USE APPROPRIATEMOUNTINGMEANS FORTHE

TYPE OFSTRUCTURE.

Z_ PLUGWIRING HOLEWITHNON-HARDENINGCAULK

ORPUTTY. M_997o

Fig. 2. Wiring C7089 Outdoor Sensor to thermostat.

69-1709EFS 2

OPERATION

Once installed and the Thermostat installer Setup

Number 8346 is set to 1 or 2, the outside temperature

can be displayed on the thermostat. See Fig. 3.

TUE

Heat On

FoltowingSchedule

HE_ Outside

-t.I I_- _,, t-- t--I

rT-S t----!----I

M19971

Fig. 3. Outside temperature reading on

TH8000 Series Thermostat.

C7089 OUTDOOR SENSOR

The C7089 Outdoor Sensor converts outdoor ambient

temperature to a resistance that the thermostat can

interpret.

The C7089 has a negative temperarule coefficient (TC), which

llleans that lesistance decreases as

tile rempelature incleases. See Table 1

CHECKOUT

Allow C7089B Outdoor Sensor to absorb outdoor air for a

minimum of twenty minutes before taking a reading.

With an accurate thermometer (:t:l°F [O.5°C]) measure

the temperature at the sensor location, allowing time for

the thermometer to stabilize before reading.

To verify sensor resistance, remove one wire from one of

the C7089 60-in. leadwires. Use an ohmmeter to

measure the resistance across the sensor. Then verify

the sensor accuracy with the temperature/resistance in

Table 1.

CALIBRATION

The C7089 Ourdool Seilsor is caliblared at tile fucroly and can-

nor be recalibrated in tile field

-2O

-18

-16

-14

-12

-10

-8

-6

-4

-2

Table 1. Sensor Resistance

at Outdoor Temperature.

Outdoor Temperature

°F °C

-28.9

-27.8

-26.7

-25.6

-24.4

-23.3

-22.2

-21.1

-20.0

-18.9

-17.8

-16.7

-15.6

-14.4

-13.3

Ohms of

Resistance

106926

100923

95310

90058

85124

80485

76137

72060

68237

64631

61246

58066

55077

53358

49598

3 69-1709EFS

C7089OUTDOOR SENSOR

Table 1. Sensor Resistance

at Outdoor Temperature (Continued).

Outdoor Temperature

°F °C

-12.2

-11.1

-10.0

-8.9

-7.8

-6.7

-5.6

-4.4

-3.3

-2.2

-1.1

O.O

1.1

2.2

3.3

4.4

5.6

6.7

7.8

8.9

10.0

11.1

12.2

13.3

14.4

15.6

16.7

17.8

18.9

Ohms of

Resistance

47092

44732

42506

40394

38400

36519

34743

33063

31475

29975

28558

27219

25949

24749

23613

22537

21516

20546

19628

18754

17928

17136

16387

15675

14999

14358

13743

13161

12607

100

t02

104

106

t08

110

112

114

116

t18

120

Table 1. Sensor Resistance

at Outdoor Temperature(Continued).

Outdoor Temperature

°F °C

20.0

21.1

22.2

23.3

24.4

25.8

26.7

27.8

28.9

30.0

31.1

32.2

33.3

34.4

35.6

36.7

37.8

38.9

40.0

41.1

42.2

43.3

44.4

45.6

46.7

47.8

48.9

Ohms of

Resistance

12081

11578

11100

10644

10210

9795

9398

9020

8659

8315

7986

7672

7372

7086

6813

6551

630t

6062

5834

5614

5404

5203

5010

4826

4649

4479

4317

Automation and (ont]'ol Sohttions

Hone_ e]] International Illc Hone_,, ell Llm{ted-Honv>_x ell L{mit_e

1985 Dougla_ Drive North 35 Dyila_c Drive

GoIden V_lley, MN 55422 Sca_orough, Ontario

M 1V 4Z9

Honeywell

@ Printed inU.S.A. on recycled

69-1709EFS G.H. 03-04 paper con[ainin9 at least lo% www.honeywe4Lcom/yourhome

post-consumer paper fibers.

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