Honeywell C7772 Series Operation manual

PRODUCT DATA

68-0213-2

C7772A-E

Wallplate Temperature Sensor

APPLICATION

The C7772 series of Wallplate Temperature Sensors are

designed to be used with the Excel 5000 family and other

Honeywell controllers. The C7772 sensors provide a resistive

output signal proportional to sensed room or space

temperature. The C7772 is well suited for low-profile wall-

mounted applications where durability and tamperproof

construction is desired, such as schools, prisons and

institutions.

FEATURES

• Low profile when mounted on industry standard utility

conduit box.

• Rugged, brushed stainless steel wallplate.

• Integral foam pad isolates wallplate sensor from

conduit box.

• Insulated screw terminals ensure reliable field wiring

connection.

• Models available with a variety of resistive temperature

sensor elements.

Contents

Application ........................................................................ 1

Features ........................................................................... 1

Specifications ................................................................... 2

Installation ........................................................................ 2

Operation .......................................................................... 3

Checkout .......................................................................... 3

C7772A-E WALLPLATE TEMPERATURE SENSOR

68-0213—2 2

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the

TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or

phone:

1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).

2. Honeywell Customer Care

1885 Douglas Drive North

Minneapolis, Minnesota 55422-4386

In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.

International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,

Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

SPECIFICATIONS

Models: See Table 1.

Dimensions: See Fig. 1.

Temperature Ratings:

Operating: 45°F to 99°F (7°C to 37°C).

Shipping: -40°F to 150°F (-40°C to 65°C).

Humidity Ratings: 5 to 95% rh, non-condensing.

Approvals:

National Electrical Code (NEC) Class II.

Fig. 1. C7772 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 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.

5. Follow local codes for installation and application.

IMPORTANT

All wiring must agree with applicable codes,

ordinances and regulations.

CAUTION

Electrical Shock or Equipment Damage Hazard.

Can shock individuals or short equipment

circuitry.

Disconnect all power supplies before installation.

Location

The C7772 Wallplate Temperature Sensor should be located

where it can sample an average air temperature. Avoid

locations where air stratification can cause sensing errors.

The sensor mounts directly on a 2 in. x 4 in. conduit box with

the screws provided.

Table 1. C7772 Models.

NOTE: TCR = temperature coefficient of resistance.

4-1/2

(114)

3-5/16

(84)

2-3/4 (70) 5/16 (8)

M16295A

Model Sensor Type Nominal Resistance

Resistance-Temperature

Curve Type

Leadwire

Color

C7772A 20K NTC Thermistor 20,000 ohms at 77°F (25°C) Non-linear Negative TCR Green/Blue

C7772B PT 1000 (TCR=385) Platinum Film 1000 ohms at 32°F (0°C) Linear Positive TCR Red

C7772C PT 100 (TCR=385) Platinum Film 100 ohms at 32°F (0°C) Linear Positive TCR Yellow

C7772D PT 3000 Platinum Film 3,266 ohms at 32°F (0°C) Linear Positive TCR Blue

C7772E 1420 ohm Resistor 1420 ohms at 75°F (24°C) Linear (15 ohms per °F) Red/Violet

C7772A-E WALLPLATE TEMPERATURE SENSOR

368-0213—2

Mounting

To mount on conduit box (see Fig. 2):

1. Remove the appropriate knockout on the standard utility

conduit box for the application.

2. Make wiring connections to the system components.

IMPORTANT

Level only for appearance. The sensor functions

normally even when not level.

3. Use the No. 6 screws provided to mount the wallplate to

the conduit box.

Wiring

CAUTION

Electrical Shock or Equipment Damage Hazard.

Can shock individuals or short equipment

circuitry.

Disconnect all power supplies before installation.

CAUTION

Erratic System Operation Hazard.

Failure to follow proper wiring practices can

introduce disruptive electrical interference (noise).

Keep wiring at least one foot away from large inductive

loads such as motors, line starters, lighting ballasts,

and large power distribution panels.

Shielded cable is required in installations where these

guidelines cannot be met.

Ground shield only to grounded controller case.

IMPORTANT

• Temperature sensor wiring can be sized from

16 to 20 AWG depending on the application.

• The maximum length of wire from a device to the wall-

plate sensor is 300 ft (91m).

NOTE: Erratic temperature readings from a sensor can be

caused by the wiring practices described below.

These must be avoided to assure proper operation:

1. Do not route temperature sensor wiring with

building power wiring, next to control contactors,

near light dimming circuits, electric motors or weld-

ing equipment.

2. Avoid poor wiring connections.

3. Do not mount sensor in an incorrect environment.

Connect the low voltage wiring from the controller terminals to

the sensor screw terminals and tighten. See Fig. 2.

Fig. 2. Mounting, wiring for C7772.

OPERATION

The C7772 Wallplate Temperature Sensor provides a resistive

output signal proportional to the sensed room temperature.

CHECKOUT

The C7772 Wallplate Temperature Sensor is immediately

operational after wiring connections are made. Use an

accurate thermometer of ±1°F (0.5°C) to measure the

temperature at the sensor location. To verify sensor accuracy,

use an ohmmeter to measure the resistance across the sensor

wires and use Table 2 to check the accuracy of the specific

model.

Table 2. Typical Resistance of Sensor Models.

Typical Resistance (in ohms)

C7772A C7772B C7772C C7772D C7772E

At 41°F (5°C) 54,200 1020 102 3310 1930

At 50°F (10°C) 41,758 1039 103.9 3353 1795

At 59°F (15°C) 32,427 1059 105.9 3397 1660

At 68°F (20°C) 25,370 1078 107.8 3440 1525

At 77°F (25°C) 20,000 1097 109.7 3484 1390

At 86°F (30°C) 15,856 1117 111.7 3527 1255

At 95°F (35°C) 12,654 1137 113.7 3571 1120

STANDARD UTILITY

CONDUIT BOX

CONNECTOR

LOCKNUT

AND

CONDUIT

TO APPROPRIATE

SYSTEM

COMPONENTS

BLANK

FACEPLATE

M16296

Automation and Control Solutions

Honeywell International Inc. Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9

customer.honeywell.com

C7772A-E WALLPLATE TEMPERATURE SENSOR

® U.S. Registered Trademark

68-0213—2 B.B. Rev. 08-05

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