Honeywell C7089B Bedienungsanleitung

X-XX UL

INSTALLATION INSTRUCTIONS

C7089B

Outdoor Sensor

APPLICATION

The C7089B Outdoor Sensor is used with the T8500 and

T8600 Thermostat families on models with outdoor

temperature option. It senses the outdoor temperature

for display at the touch of a key. The sensor is encapsu-

lated to protect against water and contaminants, and

includes 60 in. leadwires.

SPECIFICATIONS

Operating Ambient Temperature Range:

-40 to 128°F (-40 to 53°C)

Operating Relative Humidity:

5% to 95% non-condensing

Dimensions in inches (millimeters):

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

hazardous 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 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 (Fig. 1)

Mount the sensor where:

•setting can not be tampered with.

•there is good air circulation.

•it can measure the true outdoor ambient temperature.

•surface is flat.

•he wire distance between the C7089 and thermostat

is less than 200 feet.

not

mount the sensor:

•in the direct sunlight.

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

line from an outdoor compressor unit, vent or fan will

cause 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 surface where the C7089B

mounting clip will be mounted.

3. Mount the clip.

69-1020-2

69-1020—2 2

C7089B OUTDOOR SENSOR

Fig. 1. Typical locations for outdoor sensor.

Wiring

CAUTION

Keep wiring at least one foot away from large

inductive loads such as motors, line starters,

lighting 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.

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 rerout-

ing 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 the power supply before connecting

the wiring to prevent electrical shock or equip-

ment damage.

M7514

Fig. 2. Wiring diagram for the C7089B

Outdoor Sensor to the thermostat.

OPERATION

The C7089B Outdoor Sensor converts outdoor ambient

temperature to a resistance that the thermostat can

interpret. The outdoor temperature is displayed when the

Information key is pressed.

NOTE: The thermostat Installer Setup mode number 24

must be set to 01 for the outdoor temperature to be

displayed.

The C7089B has a negative temperature coefficient

(TC), which means that the resistance increases as the

temperature decreases. Fig. 3 shows the resistance

characteristics of the C7089B Sensor.

USE APPROPRIATE MOUNTING MEANS FOR THE TYPE

OF STRUCTURE.

PLUG WIRING HOLE WITH NON-HARDENING CAULK OR PUTTY.

OT TERMINAL LOCATION VARIES WITH MODEL.

C7089

WIRING HOLE

THROUGH

STRUCTURE

OGR

OT OT

T8600 SUBBASE

M10165

Wiring must comply with applicable codes, ordinances and

regulations.

1. Wire the C7089B Outdoor Sensor to the OT

terminals on the thermostat. If the leadwire

provided with the C7089B is not long enough, run

cable to a hole at the selected C7089B location.

Color-coded, 18-gauge thermostat wire is recom-

mended. For an example of general wiring of the

C7089B, see Fig. 2. Pigtail wiring can be used.

2. Mount the C7089B in its mounting clip.

3. Plug wiring hole using nonhardening caulk or putty.

69-1020—2

C7089B OUTDOOR SENSOR

Fig. 3. C7089B sensor resistance vs. temperature

performance characteristics.

CHECKOUT

Allow the C7089B Outdoor Sensor to soak in the outdoor air

for a minimum of five minutes before taking a reading.

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. Press the

Information key on the thermostat until the display shows

Outdoor followed by the temperature reading. See Fig. 4. The

reading should match the reading taken outdoors.

To verify the resistance of the sensor, remove one wire from

one of the C7089B wiring terminals. Use an ohmmeter to

measure the resistance across the sensor. Then verify sensor

accuracy with the temperature/resistance curve of Fig. 3.

Fig. 4. Outdoor temperature display

on the thermostat.

CALIBRATION

The C7089B Outdoor Sensor is calibrated at the factory

and cannot be recalibrated at the field.

100

200

300

400

500

600

700

800

900

RESISTANCE (K ohm)

-40

(-40)

-20

(-29)

(-18) 20

(-7) 40

(4)

(16) 80

(27)

100

(38)

120

(49)

°F

(°C)

OUTDOOR TEMPERATURE

M10172A

T8600

M13284

Outdoor

69-1020—2 4

C7089B OUTDOOR SENSOR

Honeywell Limited-Honeywell Limitée

35 Dynamic Drive

Scarborough, Ontario M1V 4Z9

69-1020—2 J.H. Rev. 11-98

Automation and Control Solutions

Honeywell International Inc.

1985 Douglas Drive North

Golden Valley, MN 55422

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