Honeywell H7625B User manual

Brand: Honeywell

Model: H7625B

Type: User manual

INSTALLATION INSTRUCTIONS

62-0330-01

H7625B, H7626B, H7635B,C

H7636B, H7655B, H7656B

DUCT-MOUNT AND OUTDOOR-MOUNT HUMIDITY/

TEMPERATURE SENSORS

APPLICATION

The H76XXB Duct-Mount and H76XXC Outdoor-Mount

Humidity/Temperature Sensors are universal Relative

Humidity transmitters that can be powered with either a

+18 to 40 Vdc or 24 Vac supply . The devices are half

wave rectified. The transmitter also includes either a 20K

ohm NTC thermistor or a 1K platinum PTC (compatible

with the T775) for optional temperature use.

The humidity sensors are designed with a field selectable

4 to 20 mA, 0 to 5 Vdc, or 0 to 10 Vdc 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 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 Configuration

The H7625B, H7626B, H7635B, H7636B, H7655B and

H7656B 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:

• Knockouts allow 1/2 in. conduit connection. To avoid

damaging board during installation, the cover can be

detached completely:

• Carefully remove wire plug from board.

• Set the cover aside.

1. Drill a 3/4” diameter hole in the duct where the

transmitter is to be mounted.

2. Insert the stainless steel probe into the hole until

the foam is in direct contact with the duct.

3. Attach the transmitter to the duct using the sup-

plied #8 X 3/4” self-tapping screws.

4. Remove the cover and install your conduit connec-

tor or watertight fitting. The outer ring is used when

using a 1/2” NPT conduit fitting.

5. After wiring the unit, place the cover back on and

gently turn it until it is tight.

Outdoor Mounting Configuration

The H7635C senses outdoor air humidity and

temperature. Mount this control where it can sense

average outdoor air humidity and temperature. Normally,

the north side of a building provides a suitable location.

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:

• Carefully remove wire plug from board.

• Set the cover aside.

H7625B, H7626B, H7635B,C H7636B, H7655B, H7656B

62-0330—01 2

The transmitter should be mounted under an eave, shield,

or in an area out of the elements or direct sunlight. The

aluminum tube should point down when mounting the

outside transmitter.

Refer to Figure 1 for proper mounting position.

1. Place the unit where it is to be mounted with the

cover facing out.

2. Attach the unit with the supplied #8 X 3/4” self-tap-

ping screws.

3. Remove the cover and install your conduit connec-

tor, watertight fitting or 1/2” vent plug. The outer

ring is used when using a 1/2” NPT conduit fitting.

4. After wiring the unit, place the cover back on and

turn it until it is tight.

Fig. 1. Typical sensor location.

Output Settings

The humidity output signal can be adjusted for 0-5Vdc, 0-

10 Vdc or 4-20 mA using the switch block. Switches 6, 7,

and 8 are used to set the output.

NOTE: Refer Fig. 2 for switch settings.

Table 1. Controller Compatibility

and Output Settings.

Fig. 2. DIP switch and Wire Connection locations.

M31319

INCORRECT CORRECT

Controller

Required Sensor Output

Setting

LONSPEC™

Setting

W7750, W7760,

W7761

4-20 mA C7600C

W7750B,C

W7760C, W7753,

W7760

0-10 Vdc (default) H7621/31

T7350, XL50,

XL100, XL500 XF

Modules, XFL

0-10 Vdc (default) n/a

Non-Honeywell 0-5 Vdc n/a

2345678

WIRE CONNECTIONS

FACTORY

USE ONLY

PUSH TAB IN AND PULL ON THE SENSOR

CABLE TO REMOVE FROM J13 CONNECTOR

RED

FACTORY

USE ONLY

M31320

SW1

TB1

J13

J14

4-20mA VIN VOUTCOM

P1P2

ZEROSPAN

GREEN

BLUE

2345678

0-10 VDC OUTPUT

(DEFAULT)

OFF

2345678

0-5VDC OUTPUT

OFF

2345678

4-20mA OUTPUT

OFF

SW1

H7625B, H7626B, H7635B,C H7636B, H7655B, H7656B

3 62-0330—01

REVERSE ACTING OUTPUT

The output can be changed to reverse acting mode. The

output range stays the same but the corresponding RH

value is opposite.

Example: Direct Acting (DA) (Default)

0-10V output mode

0V = 0% RH and 10V = 100% RH

Reverse Acting (RA)

0-10V output mode,

0V = 100% and 10V = 0%

To change the transmitter to reverse acting or back to

direct acting, set switch 4 ON to put the unit in setup

mode. After switch 4 is on, switch 2 will put the unit in

direct/reverse acting mode. When switch 2 is set to ON,

the output can be used to show if the unit is in direct or

reverse acting mode. For direct acting the output will be

1V for 0-5V, 2V for 0-10V, and 7.2mA for 4-20mA. For

reverse acting the output will be 4V for 0-5V, 8V for 0-10V,

and 16.8mA for 4-20mA.

With switches 2 and 4 ON, each time switch 5 is set to

ON the output will change to reverse acting or direct

acting.

To reset the unit to the default setting, toggle both

switches 5 and 6 ON then OFF while both switches 2 and

4 are ON.

When all calibration is completed, remember to place the

switches back into the positions that correspond to the

output needed as shown in Figure 3.

WIRING

A 16 to 22 AWG shielded cable is recommended for all

transmitters. Twisted pair may be used for 2-wire current

output transmitters. the connections to the temperature

sensor should be made with wire nuts or crimp-style

connectors.Refer to Figure 3 for wiring diagrams.

CAUTION

Never connect or disconnect wiring with

power applied.

Fig. 3. Wiring Diagrams

CAUTION

It is recommended that you use an isolated

UL-listed class 2 transformer when powering

the unit with 24 VAC. Failure to wire the

devices with the correct polarity when sharing

transformers may result in damage to any

device powered by the shared transformer.

IMPORTANT

When using shielded cable, ground the shield

only at the controller end (see Fig. 4). Grounding

both ends can cause a ground loop.

Fig. 4. Typical wiring diagram for transducer with two-

wire mA output with external DC power supply.

M31321

TEMPERATURE SENSOR-

VOLTAGE OUTPUT SIGNAL

TEMPERATURE SENSOR+

0-10 OR 0-5 VDC OUTPUT SIGNAL

SUPPLY GROUND/SIGNAL COMMON

SUPPLY VOLTAGE

4-20mA VIN VOUTCOM

CONNECT TO THE 2

22 AWG 24” FLYING LEADS

CONNECT TO THE 2

22 AWG 24” FLYING LEADS

CONNECT TO THE 2

22 AWG 24” FLYING LEADS

2 WIRE CURRENT OUTPUT SIGNAL

TEMPERATURE SENSOR+

SUPPLY VOLTAGE

4-20mA OUTPUT

4-20mA VIN VOUTCOM

TEMPERATURE SENSOR-

3 WIRE CURRENT OUTPUT SIGNAL

TEMPERATURE SENSOR+

SUPPLY GROUND/SIGNAL COMMON

SUPPLY VOLTAGE

4-20mA VIN VOUTCOM

TB1

mA OUTPUT

TRANSDUCER

ONLY

18 TO 36 Vdc

POWER SUPPLY

CONTROLLER, METER

OR RECORDER

INPUT SIGNAL

COMMON

Vin +

4-20mA –

–

M22528A

GROUND

H7625B, H7626B, H7635B,C H7636B, H7655B, H7656B

62-0330—01 4

Fig. 5. Humidity Sensor (0-10 Vdc output) wiring with T7350

(use with RH/Temperature combination T7350 units only).

Fig. 6. Typical wiring diagram for 5-wire temperature/humidity sensor with Vdc output

(used with the XL15A controller).

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

ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.

HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

HC AND HP PROVIDE 24 VAC TO THE HUMIDITY SENSOR.

M31307

RCX

T7350

SUBBASE

W1 GY1

W3/Y4 Y3 W2 Y2

AUXRH

T5 T6 T7 T4 T3

DISCHARGE

AIR

SENSOR

OUTDOOR

AIR

SENSOR

MOTION

SENSOR

HUMIDITY SENSOR

OSOS ASAS

MHC HPHS

COM VIN

(Vac)

VOUT

(0-10 Vdc)

(HOT)

COMPRESSOR

CONTACTOR 1

COMPRESSOR

CONTACTOR 2

HEAT

RELAY 1

FAN

RELAY

ECONOMIZER

HEAT

RELAY 2

COMPRESSOR

CONTACTOR 3

COMPRESSOR

CONTACTOR 4

12 234567

TR23 Remote Sensor

891011 1

GND

OUT

GND GND 24

VAC

COM

VAC

COM

VAC

OUT

COM

VDC

OUT

GND E-BUS E-BUS

ANALOG

OUT

17 18 19 20 21 22 23 24 25 26 27 28 29

(HOT)

31 32 33 34 35 36 37 38 39 40 41 42 43 44

12345 678 9101112 14 161513

W7760A AI

GND

–

P7640

–

P7640

–

H76XX

–

M18302C

VIN (Vac)

COM

VOUT (0-10 Vdc)

PWR

COM

OUT

PWR

COM

OUT

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

TEMPERATURE SIGNAL CONNECTIONS ARE NOT POLARITY SENSITIVE.

H7625B, H7626B, H7635B,C H7636B, H7655B, H7656B

5 62-0330—01

Fig. 7. Typical wiring diagram for 5-wire temperature/humidity sensor with Vdc output

(used with the Spyder controller).

CHECKOUT

CAUTION

Equipment Damage Hazard.

Can short electric circuitry.

• Never connect 120 Vac to the transducer.

• Connect only DC voltage to a transducer

intended for DC supply.

NOTE: Use laboratory quality meters and gauges for

applications requiring a high degree of

accuracy.

1. Verify that the transducer is mounted in the correct

position.

2. Verify appropriate input signal and voltage supply.

3. Verify appropriate configuration range.

Converting Output Signal to

Percent RH

4 to 20mA Signal

((mA signal) -4) / 0.16 = percent RH

Example: 12mA output signal

(12-4) / 0.16 = 50% RH

0 to 5 Vdc Signal

(VDC signal) / 0.05 = percent RH

Example: 1.25vdc output signal

1.25 / 0.05 = 25% RH

0 to 10 Vdc Signal

(VDC signal) / 0.10 = percent RH

Example: 7.50vdc output signal

7.50 / 0.10 = 75% RH

Table 2. Troubleshooting.

M31268

24 VAC

24 VAC COM

EGND

SHLD

SBUS1

SBUS2

NET-1

NET-2

24 VAC

COM

24 VAC

2 3 4 5 6 7 8 9

DO-1

DO-2

COM

DO-3

DO-4

COM

DO-5

DO-6

0 1 2 3 4 5 6

COM

DO-7

DO-8

COM

7 8 9 0

11111111112

AO-1

COM

AO-2

AO-3

COM

D1-1

D1-2

COM

2 3 4 5 6 7 8

D1-3

D1-4

20VDC

U1-1

9 0 1 2

22 2222222333

COM

U1-2

U1-3

COM

U1-4

U1-5

COM

U1-6

HUMIDITY SENSOR

4-20mA VIN COM VOUT +TEMP

Problem Items to Check

No reading •Verify correct supply voltage at the power terminal blocks.

•Verify correct wiring configuration and DIP switch settings per Figures 2 and 3.

•Verify that terminal screws are connected tightly with all wires firmly in place.

Erratic readings •Verify all wires are terminated properly.

•Ensure that there is no condensation on the board.

•Verify clean input power. In areas of high RF interference or noise, shielded cable can be

necessary to stabilize signal.

Inaccurate

readings

•If you suspect that the transmitter is not reading within the specified tolerance, please contact

the factory for further assistance

H7625B, H7626B, H7635B,C H7636B, H7655B, H7656B

62-0330—01 6

APPENDIX

RH Test and Configuration DIP Switch Settings (Table 3)

IMPORTANT

• Only adjust these switches for troubleshooting or

recalibrating the sensor.

(Adjustment is not normally necessary.)

Test mode will make the transmitter output a fixed 0%,

50%, or 100% value. The sensor will not affect the

transmitter output. This is used for troubleshooting or

testing only.

Switches 1, 2, and 3 are used for test mode. The output

will be a fixed 0%, 50%, or 100% signal that corresponds

to the output selected with switches 6, 7, and 8. Refer to

Figure 4 for switch settings.

Fig. 8. Settings

Table 3. Test and Calibration Settings (8-Switch Block).

* = Switch setting does not affect output

** = This switch needs to be activated first

— = Indicates OFF

Setting 12345678

4-20mA Output ————————

0-5 VDC Output —————OnOn—

0-10 VDC Output ——————OnOn

0% RH Output On———————

50% RH Output —On——————

100% RH Output ——On—————

Increment RH Output ———On**On———

Decrement RH Output ———On**—On——

Reset to Original Calibration ———On**OnOn——

Reverse or Direct Acting — On — On** On — — —

Reverse or Direct Acting Reset — On — On** On On — —

2345678

WIRE CONNECTIONS

FACTORY

USE ONLY

PUSH TAB IN AND PULL ON THE SENSOR

CABLE TO REMOVE FROM J13 CONNECTOR

RED

FACTORY

USE ONLY

M31322

SW1

TB1

J13

J14

4-20mA VIN VOUTCOM

P1P2

ZEROSPAN

GREEN

BLUE

2345678

TEST SELECTION

SWITCHES (SW1)

0% RH OUTPUT

OFF

2345678

50% RH OUTPUT

OFF

2345678

100% RH OUTPUT

OFF

SW1

H7625B, H7626B, H7635B,C H7636B, H7655B, H7656B

7 62-0330—01

CALIBRATION

NOTE: This is only a single point calibration. All trans-

mitters are factory calibrated to meet/exceed

published specifications. Field adjustment

should not be necessary.

The dipswitch allows the user to calibrate the sensor

through the software. Setting switch 4 ON will put the

transmitter into setup mode allowing the increment and

decrement to work. Once in setup mode, the output will

change to 50% (2.5V for 0-5V, 5V for 0-10V, 12mA for 4-

20mA). Each increment or decrement step will cause the

output to change by 0.1V for 0-5V, 0.2V for 0-10V, and

0.32mA for 4-20mA in setup mode. This can be used to

show the user how far offset the transmitter is. To see the

starting point again set switch 1 ON. This will show the

50% output again. When the unit is out of setup mode the

output will go back to RH output.

Increment RH Output

This will shift the RH output linearly up in 0.5% steps.

Switch 4 must be set to ON first. After switch 4 is on, each

time switch 5 is set ON the RH output will increase by

0.5%. The increase goes into effect each time switch 5 is

set to ON.

Decrement RH Output

This will shift the RH output linearly down in 0.5% steps.

Switch 4 must be set to ON first. After switch 4 is on, each

time switch 6 is set ON the RH output will decrease by

0.5%. The decrease goes into effect each time switch 6 is

set to ON.

Reset RH Output

This will reset the RH output back to the original

calibration. Switch 4 must be set to ON first. After switch 4

is on, toggle switches 5 and 6 ON then OFF. After 5 and 6

are OFF slide switch 4 OFF.

When all calibration is completed, remember to place the

switches back into the positions that correspond to the

output needed as shown in Figure 3.

H7625B, H7626B, H7635B,C H7636B, H7655B, H7656B

Automation and Control Solutions

Honeywell International Inc.

1985 Douglas Drive North

Golden Valley, MN 55422

Honeywell Limited-Honeywell Limitée

35 Dynamic Drive

Toronto, Ontario M1V 4Z9

customer.honeywell.com

® U.S. Registered Trademark

62-0330—01 E.K. Rev. 03-10

Printed in U.S.A.

LonSpec™ is a trademark of Echelon® Corporation.

By using this Honeywell literature, you agree that Honeywell will have no liability for any

damages arising out of your use or modification to, the literature. You will defend and

indemnify Honeywell, its affiliates and subsidiaries, from and against any liability, cost, or

damages, including attorneys’ fees, arising out of, or resulting from, any modification to the

literature by you.

Honeywell H7625B User manual

Honeywell H7625B User manual

Honeywell H7625B User manual

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