™

Installation Instructions

D296 and D297

Long Range Beam Smoke

Detectors

1.0 GENERAL INFORMATION

• Standby Current:

D296: 18.0 to 32.0 VDC.

Receiver - 45 mA @ 24.0 VDC

Transmitter - 20 mA @ 24.0 VDC

D297: 10.2 to 15 VDC.

Receiver - 50 mA @ 12.0 VDC

Transmitter - 20 mA @ 12.0 VDC

• Receiver Alarm Current:

D296: 60 mA @ 24.0 VDC

D297: 75 mA @ 12.0 VDC

• Range (distance between transmitter and receiver):

30 to 350 ft. (9.2 to 106.8 m)

• Spacing (distance between systems):

Allow no more than 60 ft. (18.3 m) between systems. Sixty foot spacing is confirmed by

Underwriters Laboratories, Inc. testing.

• Pointability:

Internally pointable optics for

±

90

°

horizontal, and

±

10

°

vertical adjustment.

• Sensitivity:

Field selectable for 20, 30, 40, 50, 60, or 70 percent beam obscuration.

• Alarm Contacts:

Normally Open contacts rated 1 amp, 60 VDC maximum for DC resistive loads. Do not use with capacitive or inductive loads.

• Trouble Contacts:

Normally Closed contacts rated 1 amp, 60

VDC maximum for DC resistive loads. Do not use with capacitive or inductive loads.

• Aux. Alarm Contacts:

Form “C” (NO, C, NC) contacts rated 1 amp,

60 VDC maximum for DC resistive loads. Do not use with capacitive or inductive loads.

• Tamper:

Receiver: Access door tamper switch in series with trouble contacts.

Transmitter: Cover tamper switch interrupts transmission upon cover’s removal.

• System Signaling:

Conventional 4-wire system. Not for use with systems that incorporate an alarm verification feature.

• Signal Delay:

Fire = Selectable 30 seconds or 5 seconds

Trouble = 20

±

2 seconds.

• Temperature:

The storage and operating range is -22

°

to

+130

°

F (-30

°

to +54

°

C).

• Mounting:

The units are designed to be mounted to 4" square or octagonal electrical boxes (not supplied).

• Listings and Approvals:

UL

ULC

S3019

CS692

MSFM Permit #1943

NY City MEA Acceptance #MEA274-93-E

CSFM

FM

#7260-1062:106

Job #OX2A9.AY

• Standard Accessories: D306 Remote Test/

Indicator Plate and Test Cable

• Options:

D307 Remote Test/Indicator Plate, D308 Field

Test Kit, and D309 Alignment Light

2.0 PRINCIPLE OF OPERATION

Each D296 or D297 beam smoke detector has a separate Transmitter and Receiver.

The Transmitter transmits an invisible infrared beam of a specific frequency and intensity. The

Receiver detects, then measures the beam’s intensity (see Figure A).

The Receiver automatically compensates for the gradual loss of signal due to dust/dirt buildup on the cover. After 50 percent of the signal is lost, the Receiver will indicate a trouble.

When the dust/dirt buildup is cleaned or the blockage is removed, the detector automatically goes back to it's normal operation level.

3.0 INSTALLATION CONSIDERATIONS

The proper location and spacing of detectors is critical in a properly installed and operating fire alarm system. For best results, it is recommended that the detectors be located and spaced in accordance with the National Fire

Protection Association (NFPA) Standard 72 “The

National Fire Code.” This standard is available at a nominal cost from The National Fire

Protection Association, Batterymarch Park,

Quincy, MA, 02269.

In all installations, good engineering judgement should prevail. The following are some general considerations:

• Do not use mirrors. The detectors should be installed with a clear line-of-sight between the

Transmitter and Receiver.

• The beam path should be clear of moving objects.

Figure A - Infrared transmission

As the beam is obscured by smoke, the

Receiver senses a decrease in the signal strength and measures that decrease. The receiver compares the signal level with two preset thresholds, an alarm threshold which is set using the sensitivity switch and a trouble threshold which is preset at approximately 3%. If the signal falls below the alarm threshold for the programmed alarm period, the Receiver signals an alarm (see Figure B). If the signal falls below the trouble threshold for more that 20 seconds, such might happen if the beam is blocked by a foreign object, the Receiver signals a trouble condition (see Figure C).

• Set the sensitivity based on the distance between the Transmitter and Receiver. See

Section 6.2 Sensitivity Adjustment.

• The detectors may be mounted directly to the ceiling or to side walls. Do not mount the units where the beam path may run parallel within

4" (10.2 cm) of a corner.

Figure B - Beam obscuration

• For a sloped or peaked ceiling, the beam path should be located within three feet of the ceiling’s peak.

• Stratification of air may hinder smoke from reaching detectors mounted close to the ceiling. Stratification occurs when smoke, rising because it is warmer than the surrounding air, reaches a level where it is the same temperature as the surrounding air and will not rise to the ceiling. If stratification is considered a possibility, extra beams should be installed where stratification is expected.

• Avoid areas subject to normal smoke concentrations such as kitchens and garages.

• Do not install units where normal ambient temperatures are below -22

°

F (-30

°

C) or above 130

°

F (54

°

C).

Figure C - Beam blockage

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© 1996 Radionics

The following are some specific installation considerations: correct wire gauge is used for these installations.

3.1 Avoid Sources of Heat and Air Movement Use the chart to determine the proper wire size, wire length and the number of transmitter and receiver pairs that can be used.

The detectors should be located where the beam path will not pass near heating and cooling outlets.

• Don’t mount where hot or cold air can blow directly into the beam path.

Wire

Length 14AWG

500 ft.

20 pairs

1000 ft.

10 pairs

2500 ft.

5000 ft.

4 pairs

2 pairs

Wire Size

16AWG 18AWG

13 pairs

6 pairs

3 pairs

1 pair

8 pairs

4 pairs

2 pairs

1 pair

• Heating, ventilating, and air conditioning systems can cause smoke to be blown away from the beam path.

- Smoke must accumulate in the beam path to be detected.

• Heaters mounted close to the beam path can cause the beam to become distorted.

3.4 Provide a stable mounting surface:

Beam Smoke detectors depend on the measurement of the projected beam to sense smoke. Therefore, shifts in the alignment of the beam due to movement of the transmitter/ receiver can cause trouble or alarm conditions.

You can test for beam distortion by monitoring the signal voltage.

• Always select a stable mounting surface.

• Never mount the unit to a suspended support such as a pipe or length of wood supported at only one end.

After setup, the signal voltage of the D296 should read 4 VDC. Monitor the voltage and turn on all heating and cooling devices in the area.

The signal voltage should not fluctuate more than 0.20 VDC. If it does, the detector should be moved to avoid these disturbances.

3.2 Avoid sources of bright light:

This type of mounting can create a “pendulum effect” which greatly multiplies even very small movements at one end of the support. For example, a 2" (5 cm) movement translates into a beam misalignment of over 20 ft. at 350 ft. (6.1

m at 106.8 m).

Sunlight and light from extremely bright sources such as the exposed bulbs of high pressure sodium, mercury vapor, and metal halide lights can cause stray signals. The Receiver should not be pointed toward any of these sources.

Mounting surfaces should be supported at opposite corners to reduce the pendulum effect.

• Always select surfaces not subject to building movement.

Sunlight: Avoid pointing the receiver directly at the rising or setting sun. If you are installing the unit where sunlight can’t be avoided, mount the receiver slightly higher than the transmitter and aimed down toward the transmitter. This should reduce this problem by causing the receiver to look below the horizon.

Bright Lights: Don’t mount the receiver where it is looking at exposed bulbs of high pressure sodium, mercury vapor, and metal halide lights.

The chart below shows where these exposed lights should be avoided.

Keep bright lights out of this area

4.5 ft. (1.4 m)

Receiver 14.5 ft.

(4.4 m)

225 ft. (68.6 m)

350 ft. (106.8 m)

Bare fluorescent lights may also pose a problem especially in long hallways where a series of lights run perpendicular to the beam. Incandescent lights are not a problem as long as they are not directly in the beam path.

The automatic compensation circuits of the

D296 will eliminate most problems created by normal building expansions and contrac-

tions. In some unusual circumstances, the walls and support structure may be subject to more significant movement due to the operation of heavy equipment, such as cranes, anchored to the top of the walls.

When in doubt about mounting surface stability, measure the signal voltage of the detector. This voltage should be 4.0 VDC. Misalignment of the beam can cause this voltage to increase or decrease. The detector will indicate a trouble condition when the voltage increases to more than 4.8 VDC, or when it decreases to less than

2.0 VDC over a long period of time or to 0.4

VDC over a few seconds. For more information on reading this voltage, see Section 7.3.

If movement of the mounting surface is suspected, relocate the detector to a surface that does not move or add supports to the mounting surface to prohibit movement.

3.3 Use the correct wire gauge and length:

• DO NOT overtighten the mounting screws.

Beam Smoke detectors are often used to protect very large areas. This means that the wire runs used to power the detectors and signal alarm conditions can be very long. The voltage available at the end of very long wire runs may not be sufficient to power the detector, especially when the system is running on battery backup. It is very important that the

When the detector is mounted to an electrical mounting box (4" square, 4" octagonal), the mounting plate may bow as a result of the mounting box screw tabs being below flush with the top edges of the mounting box. Overtightening the mounting screws bows the mounting plate inward at the bottom, causing the optics to aim low.

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Irregularities in the flatness of the mounting box edge surfaces or screw tabs will worsen this condition. Using only mounting boxes with flat, regular surfaces and properly formed screw tabs, and tightening the mounting screws to secure the mounting plate to 2 in/lb torque will minimize any misalignment caused by bowing of the mounting plate.

3.5 Consider the effects of stratification in cold environments:

In very cold environments such as unheated warehouses, smoke may cool very quickly and is less likely to rise to the ceiling. Consider additional units at lower mounting heights to help compensate for this situation.

3.6 Consider the expected Fire load:

When designing a fire alarm system, consider the expected fire load within the application.

For instance, fires caused by the ignition of flammable petroleum-based liquids usually result in a rapid buildup of heavy smoke. When these types of fires are probable, use sensitivity settings 0 or 1 which provide a response time of

5 seconds.

4.0 MOUNTING

NOTE: This product is not designed for use in outdoor applications.

Install a 4" square or octagonal electrical box

(not supplied) to a rigid surface that will not be subject to movement or vibrations.

NOTE: If not mounting to an electrical box, be sure the surface will not be subject to movement or vibrations. For example: do not mount directly to a suspended ceiling without extra support.

• Remove the Receiver's Access door (1 screw), then remove the cover (4 screws).

See Figure D.

ACCESS DOOR

COVER MOUNTING

SCREWS (4)

Figure D - Access door and cover

• Remove the Receiver’s backplate by removing the single mounting screw from the top of the circuit board carrier plate then separating the two plates (see Figure E).

© 1996 Radionics

REMOVE TO

EXPOSE BACKPLATE

DO NOT

REMOVE

MOUNTING

SLOTS (4)

WIRING

ENTRANCE

Figure E - Removing the backplate

• Bring wiring from the electrical box through the wire entrance.

NOTE: All wiring should be unpowered.

• Securely mount the backplate to the electrical box.

• Return the circuit carrier plate to the backplate. Secure it in place with the single mounting screw.

• Repeat this mounting procedure for the

Transmitter.

5.0 WIRING

CAUTION: Only apply power after all connections have been made and inspected.

• Wire the Transmitter and Receiver terminals as follows (see Figure F).

• Receiver terminals 8 & 9:

Input power terminals. See Section 1.0 for the operating voltages of the D296 and D297.

NOTE: Resetting from a fire alarm requires power to the Receiver to be interrupted for at least one second. If not provided by the fire panel, it can be accomplished by installing a switch in series with terminal 9.

Remote Indicator Plate

The D306 Remote Indicator Plate is shipped with the D296 as a standard accessory.

Although the Remote Indicator Plate is not required, the manufacturer recommends its installation to provide a means of checking the condition of the detector from ground level.

If a D306 or D307 Remote Indicator Plate will be used, install the Remote Indicator Connector to the Receiver now (see Figure G).

NOTE: The remote indicator should be located no further than 100 ft. (30.5 m) from the

Receiver and wired with 18 AWG or larger wire.

• Slide the Remote Indicator Connector over the pins just to the right of the receiver’s terminal strip.

Figure H). This allows the Transmitter to power up while its cover is off.

AIM MODE

BUTTON

GREEN

LED

Figure H - Cutout view of Transmitter circuit board showing Aim Mode button location.

- Check the Transmitter’s green LED. It should be flashing on and off.

- If the LED is off, check for the presence of power and proper polarity on terminals 1 (–) &

2 (+).

- A steady green LED indicates a faulty

Transmitter, and the unit should be returned to the factory.

• Check the three Receiver LEDs (see Figure

J).

Trouble/Yellow

Red/Alarm Green/Normal

AUX.

RELAY

ALARM

Receiver

FIRE

ALARM

TRBL

ALARM VDC

1 2 3 4 5 6 7

– +

8 9

Alarm Loop

Fire Alarm

Control Panel

Power Loop –

Power Loop +

End of Line resistor

Receiver

Fire

Alarm

Trouble

Alarm

10 to 32

VDC

4 5 6 7

– +

8 9

Remote Indicator

Plate Connector

1 2

– +

Transmitter

Fire Alarm

Control Panel

Alarm Loop

EOL

Figure F - Wiring a single unit

NOTE: Do not coil excess wiring inside the units.

• Transmitter terminals 1 & 2:

Input power terminals. See Section 1.0 for the operating voltages of the D296 and D297.

• Receiver terminals 1, 2 & 3:

Form “C” Auxiliary relay contacts. Terminals 1

& 2 will open on fire alarm; terminals 2 & 3 will close (short) on fire alarm.

• Receiver terminals 4 & 5:

Normally Open Fire alarm contacts will close

(short) on fire alarm.

• Receiver terminals 6 & 7:

Normally Closed Trouble contacts will open for trouble alarm.

Power Loop –

Power Loop +

Remote

Indicator Plate

Voltage Monitor

Ground (–)

Red LED

Yellow LED

Green LED

Violet

Black

Red

Yellow

Green

Figure G - Connecting the Remote Indicator

Plate

6.0 SETUP

Before starting this section, confirm that all connections have been made and are secure, then apply power to both units.

• Press the Aim Mode button (directly above the green LED) on the Transmitter (see

Figure J - Receiver's LEDs

- It is normal for all of them to be on at this time, with the green indicator either flashing or constantly on.

- If all are off, check for the presence of power and proper polarity on terminals 8 (–) & 9 (+).

• Mount an D309 strobe aiming light or equivalent (e.g. Faraday 5508) as close to the

Receiver as possible (preferably on top of the

Receiver).

- Point it at the Transmitter as your guide for aiming (an aiming light may not be necessary for short distance separations).

6.1 Preliminary Alignment

Each optical module is equipped with two alignment mirrors (one on each side) for initial alignment (see Figure K).

FRONT VIEW SIDE VIEW

HORIZONTAL

FINE TUNE

VERTICAL

FINE TUNE

ALIGNMENT

MIRRORS

FRONT BORE SIGHT

REAR BORE SIGHTS

ALIGNMENT

Figure K - The optical module

To initially align an optical module, look into either mirror from a side angle at least 2 feet from the module. The optical module is pointed at objects seen in the mirror when the orange colored front bore sight is in the center of the rear bore sights (see Figure L).

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D296/D297 Installation Instructions

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Front Bore Sight

Rear Bore Sights

Figure L - View of the alignment mirror with bore sights aligned properly.

HINT: Use alignment sights like aiming a gun.

• Rotate the Transmitter's optical module left or right until the image of the aiming light (or

Receiver image, if aiming light is not used) can be seen in the mirror.

- If initially aimed too high or low, adjust the

Vertical Fine Tuning adjustment allen screw

(with supplied allen wrench) slightly up or down until the image is found.

• Use the Vertical Fine Tuning adjustment screw and the Horizontal Fine Tuning adjustment screw to fine tune the image to the center of the mirror (in-line with the front and rear bore sights).

• Replace and secure the Transmitter's cover when this alignment procedure is complete.

• Check the Transmitter's green LED. It should be flashing.

• Replace and secure the Transmitter's Access door.

• Align the Receiver to the image of the

Transmitter using the above preliminary alignment procedure.

• Check the Receiver's green LED. It should be flashing. This indicates that the preliminary alignment is complete.

- If the Receiver’s green LED is not flashing, repeat the preliminary alignment procedure for the Receiver.

6.2 Sensitivity Adjustment

Use the chart below (Figure M) to aid in the sensitivity adjustment.

3

4

5

6

7

Recommended Settings

Switch Sensitivity Alarm

Setting

0 30%

Response

5 sec.

Beam

Length

30-100 ft. (9-31 m)

1

2

60%

20%

5 sec.

30 sec.

100-350 ft. (31-107 m)

30-50 ft. (9-15 m)

30%

40%

50%

60%

70%

30 sec.

30 sec.

30 sec.

45-75 ft. (14-23 m)

70-100 ft. (21-31 m)

90-140 ft. (27-43 m)

30 sec.

120-180 ft. (37-55 m)

30 sec.

160-350 ft. (49-107 m)

Figure M - Recommended Settings chart

• Select the appropriate sensitivity setting from the above chart based on the distance between the Transmitter and Receiver.

• Set the Receiver’s Sensitivity switch at this setting.

• The Sensitivity switch is located just to the right of the optical module on the Receiver.

The indicator or pointer marking runs along the side of the switches shaft (see Figure N).

• The recommended settings chart lists distances with some settings that overlap. For more sensitive detection, select the lower number setting. For better immunity to false alarms, select the higher number setting.

NOTE: Positions 8 and 9 are not valid positions. They are not to be used.

6.3 Fine Tune Alignment

• Connect the supplied D1005 test cable to pins 1, 2 and 3 of P6, the group of pins located just to the right of the Receiver’s terminal strip (see Figure O).

Figure O - D1005 connection

- Temporarily disconnect the Remote

Indicator Plate connector, if installed.

• Connect a 20,000 ohm/volt (or greater) DC

VOM to the black (–) and red (+) leads of the

D1005

- Set meter scale so that readings of 0.0 to

5.0 VDC can be read.

• Check the three LEDs on the Receiver.

- If the beam is being received by the

Receiver, the green LED should be flashing, and the red and yellow LEDs should be on steady.

- If the green LED is on steady, the beam is not reaching the Receiver. If this is the case, the preliminary alignment procedure should be attempted again.

• Observe the meter readings and adjust the

Receiver’s optical module using the Horizontal and Vertical Fine Tuning adjustment screws for a maximum reading on the meter.

This is the most critical process of alignment. For the most effective operation of this system, the peak voltage during fine tune alignment must be obtained.

NOTE: When performing fine tune alignment, keep arms and hands away from the front of the Receiver and out of the beam path.

• The maximum voltage reading will vary depending on the distance between the

Transmitter and Receiver. The following chart

(Figure P) gives approximate voltage values after alignment has been completed.

3

4 5 67

12

8

9

0

Figure N - Sensitivity Switch

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D296/D297 Installation Instructions

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Beam Length

50 ft. (15 m)

100 ft. (31 m)

150 ft. (46 m)

200 ft. (61 m)

250 ft. (76 m)

300 ft. (92 m)

350 ft. (107 m)

Alignment Voltage

4.00 VDC

2.75 VDC

2.00 VDC

1.75 VDC

1.50 VDC

1.00 VDC

0.75 VDC

Figure P - Approx. voltage per beam length

Hint: Make a note of the alignment voltage. It may be helpful if future troubleshooting is necessary.

• After completing the fine tune alignment, remove the test cable, then replace and secure the Receiver's cover.

• Check the status of the Receiver’s green

LED. It should still be flashing.

• With the meter still connected to the test cable, reinstall the test cable to P6 through the opening in the cover (red lead towards center of unit).

• An alarm test may be performed here if desired by connecting the white and black wires of the D1005 To reset the unit, temporarily remove power.

• Press the Receiver’s Setup button located just below the P6/test cable connection (see

Figure Q). Press only if the covers are on both Transmitter and Receiver.

- This starts a one to two minute automatic internal setup process that results in a reference voltage for measuring beam blockages.

LEDs

Setup

Button

Figure Q - The Receiver's setup button

- The red and yellow LEDs should turn off, and the green LED will turn on steady. After some voltage fluctuations, the meter should settle at 5.0 VDC.

NOTE: Be careful not to block the beam or move the units during this time.

- At the end of the setup period, the

Receiver’s green LED will flash, and the voltage will drop to between 3.8 and 4.2

VDC. This is a reference voltage that later readings can be compared to when determining the need for cleaning.

• If the voltage is not between 3.8 and 4.2

VDC, push the Setup button again.

• After setup is complete, remove the test cable

(and reconnect the Remote Indicator Plate connector if used).

• Replace and secure the Access door.

© 1996 Radionics

7.0 OTHER INFORMATION

7.1 Fire Alarm Reset

To reset the Receiver after a fire alarm has occurred, remove power from the Receiver for at least one second, then reapply (see also,

Power Outage, section 7.4).

7.2 Cleaning

At least once a year, the outside of the covers should be cleaned with a common window cleaner and a soft, clean cloth.

Under normal conditions, this should not result in a trouble alarm as long as the beam is not continuously blocked for more than 18 seconds.

After cleaning, recheck the reference voltage. If the voltage is less than 3.8 VDC, or greater than

4.2 VDC, calibrate the units (see section 7.3.)

7.3 Reference Voltage Calibration

The reference voltage of the detectors should be checked at least once a year (or more often if required by local regulations or authorities having jurisdiction). Clean covers are neces- sary for proper reference voltage readings.

To check the reference voltage, remove the

Receiver's Access door and measure the reference voltage, using the supplied test cable, or measure the voltage at the D307 Remote

Indicator Plate (if used). If the voltage is less than 3.8 VDC, remove the cover and perform a fine tune alignment including use of the Setup switch. If above 4.2 VDC, press the Setup button. Calibration is not necessary if the voltage is between 3.8 and 4.2 VDC.

7.4 Power Outage

When power is removed, then reapplied to the

Receiver (such as in a power outage or alarm reset), the original reference voltage information is lost.

If the cover is on at the time of power-up, the

Receiver will automatically restart the internal setup process (to get a new reference voltage) when power is applied. If the cover is off, the

Setup button will have to be pressed after the cover is reattached.

7.5 Remote Indicator Plate Connector

Momentarily connecting the orange and black leads of the connector (see Figure R) will produce a test alarm. For a remote test, install a momentary switch between the orange and black wires.

ORANGE - Remote Alarm Test

BLUE - Analog ref. voltage out

BLACK - Common (-)

RED - Red LED indicator

YELLOW - Yellow LED indicator

GREEN - Green LED indicator

Figure R - Remote Indicator Plate connector

The black and blue wires may be connected to an analog meter for reference voltage measurements. The red, yellow, and green wires may be connected to remote LEDs.

P/N 31344

Each wire is current limited to a maximum of

10.0 mA DC.

7.6 Smoke Density/Obscuration Information

The total obscuration of the infrared beam is dependent upon the density and width of the smoke cloud along the beam path.

As the width of the smoke cloud increases along the beam path, less dense smoke will be needed for an equal obscuration of the beam path. In practice, the smoke cloud is assumed to be the entire distance of the beam path; therefore, the total obscuration required for alarm should be selected by setting the sensitivity pot as recommended in section 6.2.

Since the total obscuration of the beam by smoke increases with distance between the units (because more smoke will be within the beam path), the detector can be made less sensitive as the distance increases. Additionally, the sensitivity of the detector should be made less at greater distances because obscuration by other contaminants such as dust increases.

The sensitivity should be set to respond to the proper smoke obscuration and also to reduce the chance of a false activation.

As shown in Figure S, if the expected smoke density is 0.5 percent per foot, the obscuration at 50 feet is 20 percent and at 250 feet it is 73 percent.

The next chart (Figure T) shows the sensitivity pot setting (total obscuration) that is needed for alarm.

made within one year after initial installation and every alternate year thereafter (reference NFPA

72). A D308 Test Kit should be ordered to test the unit’s sensitivity in the field. The chart

(Figure U) below represents alarm information for the filters in the D308 as well as the

Sensitivity Test Kit provided with the units.

The Sensitivity Test Kit (supplied) may be used to check the sensitivity of the detectors during installation only. For field testing, the D308 must be used. Each filter decreases the detector’s signal by a defined amount. When each filter is placed in front of the Receiver’s optical module for at least 30 seconds (5 seconds for position 0 or 1), the approximate sensitivity setting of the installed detector can be determined by the detector's response as shown in Figure U.

Sensitivity

Setting

2

0 or 3

4

5

1 or 6

7

Must NOT

Alarm

0% (no filter)

0% (no filter)

20% filter

20% filter

40% filter

40% filter

MUST

Alarm

40% filter

60% filter

60% filter

80% filter

80% filter

80% filter

3.0

2.5

4.0

3.5

2.0

1.5

UL Minimum Sensitivity

1.0

0.5

30% 40% 50%

20%

60 70%

0.0

UL Maximum Sensitivity

30 (9m) 80 (24m) 130 (40m) 180 (56m) 230 (70m) 280 (85m) 330 (100m)

Distance Between Transmitter and Receiver

Figure S - Smoke density/obscuration chart

Sensitivity Pot

Setting

2

0 or 3

4

5

1 or 6

7

Total Obscuration at Alarm

20%

30%

40%

50%

60%

70%

Figure T - Sensitivity pot/obscuration chart

7.7 Field Sensitivity Measurements

The detectors automatically compensate for the effects of dust or dirt accumulation on the covers and for component aging. The NFPA requires that the detector's sensitivity be measured in the field, and requires that these measurements be

D296/D297 Installation Instructions

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Figure U

NOTE: Testing these detectors will activate a fire alarm. Be sure to inform all concerned personnel before performing and testing.

7.8 FCC Compliance Notice

This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to Part 15 of the FCC Rules.

These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in strict accordance with the manufacturer's instructions and recommendations, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment on and off, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and the Receiver.

• Connect the equipment into an outlet on a circuit different from the Receiver.

• Consult the installing company or an experienced radio/TV technician for help.

The booklet, "How to Identify and Resolve

Radio-TV Interference Problems,” prepared by the Federal Communications Commission

(FCC) may prove helpful. This booklet is available from the U. S. Government Printing

Office, Washington, DC 20402. Please specify

Stock No.004-000-00345-4.

© 1996 Radionics

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© 1996 Radionics

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D296/D297 Installation Instructions

Page 7 © 1996 Radionics

Start

TX = Transmitter

RX = Receiver

At TX unit

Press the aim mode button

Is the green

LED on TX blinking?

No

• LED off

Check power.

• LED steady.

TX fault.

Call DS

Mount TX and RX according to the

Installation Guide and applicable fire codes.

• Apply power to both units

• Go to TX

At RX unit set sensitivity per figure M.

Point the RX at the

TX using its alignment sight for initial adjustment.

Yes

• No LED = No power

• Steady LED = Not seeing TX

• Flashing Yellow =

Invalid sensitivity setting (see Figure M)

Recheck RX alignment and clear beam path

No

Point the TX at the RX using its alignment sight.

Fine tune using enclosed allen wrench.

TX alignment is

complete. Replace the housing and access cover. Go to RX unit.

Is RX green LED flashing?

Red and yellow steady?

Yes

• Attach the test cord through the access hatch.

• Press the setup button to start the two minute learn mode.

• Do not block either unit during this mode.

Remove the test cable and replace the outer cover.

Leave the access door off.

Is the green LED blinking?

Is the meter voltage between

3.8 and 4.2 VDC ?

No

Push the set-up button again. If still unsucessful recheck

RX alignment

™

Yes

• Attach the supplied test cord to terminals 2 and 3 of connector P6 (see Figure O)

• Check voltage using 20K ohm/volt DC VOM

• Optimize the voltage reading per Figure P using the allen wrench to fine tune.

Alignment is complete.

Remove test cable.

Connect the remote test/indicator plate if used, to

P6. Replace access hatch door.

Verify operation using enclosed test filters.

End

© 1996 Radionics, Inc., Salinas, CA, U.S.A. All rights reserved.

™ The Radionics logo is a registered trademark of Radionics, Inc., Salinas, CA, U.S.A.

Radionics, Inc., 1800 Abbott Street

Salinas, CA, 93901, U.S.A.

Customer Service: (800) 538-5807