Honeywell C7772A Operation manual

PRODUCT DATA

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C7772A, F, G

Wallplate Temperature Sensor

APPLICATION

The C7772A series of Wallplate Temperature Sensors are

designed to be used with the Excel 5000 family and other

Honeywell controllers. The C7772F Series is designed to be

used with the TB7600, TB7300, and TB7200 Series

communicating thermostats and other controllers that require

a 10K ohm NTC Type II sensor. The C7772G is designed to

be used with WEBs-AX I/O modules and other controllers that

require a 10K ohm NTC Type III sensor. 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 tamper-proof

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.

C7772A, F, G WALLPLATE TEMPERATURE SENSOR

68-0213-04 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

3. http://customer.honeywell.com or http://customer.honeywell.ca

International Sales and Service Offices in all principal cities of the world. Manufacturing in Belgium, Canada, China, Czech

Republic, Germany, Hungary, Italy, Mexico, Netherlands, United Kingdom, and United States.

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).

Long-term temperature sensor drift:

(for 20K ohm sensors only)

Maximum sensor drift is nominally +/-0.13°F after 5 years of

operation, no appreciable drift thereafter. No calibration of the

device is possible. Long term drift calibration/maintenance

through controller software is typically not necessary.

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.

4-1/2

(114)

3-5/16

(84)

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

M16295A

C7772A, F, G WALLPLATE TEMPERATURE SENSOR

368-0213—04

Table 1. C7772 Models.

NOTE: TCR = temperature coefficient of resistance.

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

wallplate 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

welding 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.

Model Sensor Type Nominal Resistance

Resistance-Temperature

Curve Type

Lead Wire

Color

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

C7772F 10K Ohm NTC Type II Thermistor 10,000 ohms @ 77°F (25°C) Non-linear Negative TCR Green/White

C7772G 10K Ohm NTC Type III Thermistor 10,000 ohms @ 77°F (25°C) Non-linear Negative TCR White/White

STANDARD UTILITY

CONDUIT BOX

CONNECTOR

LOCKNUT

AND

CONDUIT

TO APPROPRIATE

SYSTEM

COMPONENTS

BLANK

FACEPLATE

M16296

C7772A, F, G WALLPLATE TEMPERATURE SENSOR

Automation and Control Solutions

Honeywell International Inc.

1985 Douglas Drive North

Golden Valley, MN 55422

customer.honeywell.com

® U.S. Registered Trademark

68-0213—04 L.L. Rev. 01-2012

Printed in United States

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 C7772F C7772G

At 41°F (5°C) 54,200 25,392 23,467

At 50°F (10°C) 41,758 19,901 18,789

At 59°F (15°C) 32,427 15,712 15,137

At 68°F (20°C) 25,370 12,493 12,268

At 77°F (25°C) 20,000 10,000 10,000

At 86°F (30°C) 15,856 8,057 8,196

At 95°F (35°C) 12,654 6,531 6,754

This manual suits for next models

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