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INSTALLATION INSTRUCTIONS

63-2579—3

H7625B; H7635B,C; H7655B

Duct-Mount and Outdoor-Mount

Humidity/Temperature Sensors

APPLICATION

The H7625B, H7635B, H7655B Duct-Mount and H7635C

Outdoor-Mount Humidity/Temperature Sensors are

universal Relative Humidity transmitters that can be

powered with either a +18 to 36 Vdc or 24 Vac supply.

The sensors use a half-wave bridge rectifier to convert

AC power to a usable DC voltage. The device also

includes a 20K ohm temperature sensor for optional use.

The humidity sensors are designed with a field-

selectable 4to20 mA, 0to5Vdc, or 0to10Vdc output

signal equivalent to 0 to 100% RH. All units are shipped

from the factory with a default setting to accept AC power

with three-wire, 0 to 10 Vdc loop-powered output.

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 ratings given in instructions and on the

product to ensure 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

Electrical Shock or Equipment Damage

Hazard.

Can shock individuals or short equipment

circuitry.

Disconnect power supply before installation.

CAUTION

Equipment Damage Hazard.

Improper wiring can damage the sensor

beyond repair.

Follow the wiring instructions carefully.

Mounting

The method of mounting depends on the particular

sensor application. The following procedures include

outdoor and duct applications. Also refer to the

instructions for the electronic control.

Duct Mounting

The H7625B, H7635B and H7655B can be mounted in a

duct to sense humidity and temperature.

IMPORTANT

Select a location to expose sensor to average

duct humidity and temperature. Avoid locations

where stratification can cause sensing errors.

NOTES:

— H7635C is weatherproof for outdoor use.

Knockouts allow 1/2 in. conduit connection.

— To avoid damaging board during installation,

the cover can be detached completely:

1.Carefully remove wire plug from board.

2.Set the cover aside.

1. Cut a hole in the duct just large enough to accept

the sensing element.

2. Open case by rotating the cover counterclockwise.

3. Mount standard 1/2 in. conduit to the case.

4. Use case to mark mounting screw pilot hole

locations.

5. Drill the pilot holes and fasten the sensor to the

duct.

6. Wire the sensor. See Wiring section.

NOTE: The two free wires are thermistor wiring

connections. When connecting these, use

two wire nuts.

7. Reattach the wire plug and cover being careful not

to pinch wires between the cover and case.

1 2 3 4 5 6 7 8

Resumo do Conteúdo

Página 1 - Humidity/Temperature Sensors

INSTALLATION INSTRUCTIONS63-2579—3H7625B; H7635B,C; H7655B Duct-Mount and Outdoor-Mount Humidity/Temperature SensorsAPPLICATIONThe H7625B, H7635B, H76

Página 2 - Output Settings (Table 1)

H7625B; H7635B,C; H7655B DUCT-MOUNT AND OUTDOOR-MOUNT HUMIDITY/TEMPERATURE SENSORS63-2579—3 2Outdoor MountingThe H7635C senses outdoor air humidity an

Página 3 - 3 63-2579—3

H7625B; H7635B,C; H7655B DUCT-MOUNT AND OUTDOOR-MOUNT HUMIDITY/TEMPERATURE SENSORS3 63-2579—3WIRINGFor voltage output, shielded cable (16-22 AWG) shou

Página 4 - 63-2579—3 4

H7625B; H7635B,C; H7655B DUCT-MOUNT AND OUTDOOR-MOUNT HUMIDITY/TEMPERATURE SENSORS63-2579—3 4Fig. 4. Typical wiring diagram for 5-wire temperature/hum

Página 5 - CHECKOUT

H7625B; H7635B,C; H7655B DUCT-MOUNT AND OUTDOOR-MOUNT HUMIDITY/TEMPERATURE SENSORS5 63-2579—3CHECKOUTCAUTIONEquipment Damage Hazard.Can short electric

Página 6 - APPENDIX

H7625B; H7635B,C; H7655B DUCT-MOUNT AND OUTDOOR-MOUNT HUMIDITY/TEMPERATURE SENSORS63-2579—3 6APPENDIXRH Test and Configuration DIP Switch Settings (Ta

Página 7 - CALIBRATION

H7625B; H7635B,C; H7655B DUCT-MOUNT AND OUTDOOR-MOUNT HUMIDITY/TEMPERATURE SENSORS7 63-2579—3CALIBRATIONAll transducers are factory calibrated to meet

Página 8 - ® U.S. Registered Trademark

Automation and Control SolutionsHoneywell International Inc. Honeywell Limited-Honeywell Limitée1985 Douglas Drive North 35 Dynamic DriveGolden Valley

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