Honeywell C7189A Bedienungsanleitung

X-XX UL

INSTALLATION INSTRUCTIONS

®U.S. Registered Trademark

C7189A

Wall Mount Temperature Sensor

APPLICATION

The C7189 Wall Mount Temperature Sensor provides the

input required by the PC8900 Perfect Climate® Comfort

Center with the W8900 Remote Module to sense tempera-

ture in indoor air spaces.

SPECIFICATIONS

Operating Ambient Temperature Range:

40 to 95°F (4.4°C to 35°C)

Humidity Setting Range:

None

Operating Relative Humidity:

5% to 95% noncondensing

Finish:

White

Dimensions in Inches (millimeters):

2 3/4 (70) width x 4 5/8 (117) height x 1 1/16 (27) depth

Accessories:

202689A Mounting Plate Assembly used to cover marks

left on the wall by the old thermostat

INSTALLATION

When Installing this Product...

1Read these instructions carefully. Failure to follow

them could damage the product or cause a hazard-

ous condition.

2Check the ratings given in the instructions and on

the product to make sure the product is suitable for

your application.

3Installer must be a trained, experienced service

technician.

4After installation is complete, check out product

operation as provided in these instructions.

CAUTION

Disconnect power supply before connecting wiring

to prevent electrical shock or equipment damage.

Location and Mounting

Locate the C7189 Wall Mount Temperature Sensor where

the setting will not be subjected to tampering.

1Choose a location for the sensor on an inside wall

about 5 ft (1.5 m) above the floor. A horizontally

mounted standard 2 x 4 in. (51 x 102 mm) junction

box can also be used at the selected location for the

C7189.

2Be sure that the wire distance between the C7189

and the W8900 does not exceed 200 feet.

3Make sure that there is good air circulation at

average temperature at the chosen location. Avoid

the following locations because they can introduce

errors in sensor measurements. See Fig. 1:

Hot areas caused by:

• Concealed pipes or ducts.

• Drafts from fireplaces or other heat sources.

• Convection or radiant heat from the sun or

electrical equipment.

Cold areas caused by:

• Concealed pipes or ducts.

• Drafts from windows and doors.

• Unheated areas on the other side of the wall

location.

Dead air areas:

• Behind doors, furniture and curtains.

• In corners and alcoves.

4Mark the area on the wall where the C7189 Sensor

or junction box will be mounted.

69-0895-1

69-0895—1 2

C7189A WALL MOUNT TEMPERATURE SENSOR

5Run cable to a hole at the selected wall location. Pull

approximately 3 inches of wire through the opening.

Color-coded, 18 gauge thermostat wire is recom-

mended.

NOTE: If the old thermostat has left marks on the wall

that are not covered by the C7189, order part no.

202689A Mounting Plate Accessory to mount

between the wall and the C7189.

RECYCLING NOTICE

If this control is replacing a control that contains

mercury in a sealed tube, do not place your old

control in the trash.

Contact your local waste management authority for

instructions regarding recycling and the proper

disposal of any control containing mercury in a

sealed tube.

If you have questions, call Honeywell Inc. at

1-800-468-1502, Monday through Friday, 7:00am

to 5:30pm.

Wiring

CAUTION

Keep wiring at least one foot away from large

inductive loads such as motors, line starters,

lightning ballasts, and large power distribution

panels. Failure to follow these wiring practices can

introduce electrical interference (noise), which can

cause erratic system operation. Use shielded cable

to reduce interference when rerouting is not

possible. Ground the shielded cable to the GND

terminal on the W8900.

Important

Erratic temperature readings from a sensor can

occur as a result of any of the wiring practices

described below. These practices must be

avoided to assure proper operation. Use shielded

cable to reduce interference if rerouting of sensor

wiring is not possible.

a. Do not route temperature sensor wiring with

building power wiring, next to control

contactors or near light dimming circuits,

electric motors or welding equipment.

b. Avoid poor wiring connections.

c. Avoid intermittent or missing building earth

ground.

CAUTION

Disconnect power supply before connecting to

wiring to prevent electrical shock or equipment

damage.

Wiring must comply with applicable codes, ordinances and

regulations.

1Wire the C7189 Sensor to the W8900 Remote

Module terminals S1 and S. For an example of

general wiring of the C7189, see Fig. 2.

2Push excess wire back into the hole. Plug the hole

using nonhardening caulk, putty or insulation to

prevent drafts from affecting performance.

3Remove C7189 cover.

4Mount the C7189 to the wall or junction box using

the screws and anchors provided.

5Level the C7189 for appearance only. Device will

function properly even when not level.

6Install C7189 cover.

5 FEET

(1.5 METERS)

YES

M4476

Fig. 1. Typical Location for C7189 Sensor.

69-0895—1

C7189A WALL MOUNT TEMPERATURE SENSOR

M4456

W8900

C7189 C7189

W8900

C7189 C7189

C7189

C7189 C7189 C7189

SENSORS MUST BE ARRANGED IN THIS NUMBER AND CONFIGURATION FOR PROPER OPERATION.

LED

(HOT)

L2 1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

IF MORE THAN ONE C7189 REMOTE SENSOR IS REQUIRED, REFER TO FIGURE BELOW.

IF SHIELDED CABLE IS REQUIRED, GROUND TO GND TERMINAL ON W8900.

GND

C7189

W8900

Fig. 2. Wiring Diagram for the C7189 Sensor to the W8900 Remote Module.

OPERATION

The C7189 Wall Mount Temperature Sensor converts

room temperature to a resistance that the controller can

interpret. The C7189 has a negative temperature coeffi-

cient (NTC), which means that the resistance decreases

as the temperature increases. Fig. 3 shows how sensor

resistance decreases by 19 ohms per degree Fahrenheit.

The C7189 can be used to control as one remote sensor,

as a temperature averaging network with the PC8900, or

with multiple C7189 Sensors connected as shown in Fig. 2.

69-0895—14

C7189A WALL MOUNT TEMPERATURE SENSOR

Home and Building Control

Honeywell Limited-Honeywell Limitée

740 Ellesmere Road

Scarborough, Ontario

M1P 2V9 QUALITY IS KEY

Helping You Control Your World

69-0895—1 J.H. Rev. 5-95 Printed in Mexico

CHECKOUT

Allow the C7189 Wall Mount Temperature Sensor to soak

in the air moving through the room for a minimum of five

minutes before taking a resistance measurement.

With an accurate thermometer (±1°F [0.5°C]), measure the

temperature at the sensor location, allowing time for the

thermometer to stabilize before reading. Remove one wire

from one of the C7189 wiring terminals. Use an ohmmeter

to measure the resistance across the sensor. Then verify

sensor accuracy with the temperature/resistance curve of

Fig. 3.

CALIBRATION

The C7189 Remote Sensor is calibrated at the factory and

cannot be recalibrated in the field.

Home and Building Control

Honeywell Inc.

1985 Douglas Drive

Golden Valley, MN 55422

Fig. 3. C7189 Sensor Resistance vs. Temperature Performance Characteristics.

OHM RESISTANCE

°F

(°C )

M6357

RESISTANCE DECREASES 18.6 OHMS PER 1°F

CHANGE OR 33.4 OHMS PER 1°C CHANGE.

2000

2100

1900

1500

1600

1700

1800

1400

TEMPERATURE

(4)

(10)

(16)

(21)

(27)

(32)

100

(38)

1300

1000

1200

2200

2300

100

7.8

8.9

10.0

11.1

12.2

13.3

14.4

15.6

16.7

17.8

18.9

20.0

21.1

22.2

23.3

24.4

25.6

26.7

27.8

28.9

30.0

31.1

32.2

33.3

34.4

35.6

36.7

37.8

2131 to 2094

2094 to 2057

2057 to 2019

2019 to 1982

1982 to 1945

1945 to 1908

1908 to 1871

1871 to 1833

1833 to 1796

1796 to 1759

1759 to 1722

1722 to 1685

1685 to 1647

1647 to 1610

1610 to 1573

1573 to 1536

1536 to 1499

1499 to 1461

1461 to 1424

1424 to 1387

1387 to 1350

1350 to 1313

1313 to 1275

1275 to 1238

1238 to 1201

1201 to 1164

1164 to 1127

1127 to 1089

ROOM TEMPERATURE OHMS OF

RESISTANCE

°F °C

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