Specifications

ManualsBrandsBosch ManualsSafetyD296/D297

Installation Instructions

D296 and D297

Long Range Beam Smoke Detectors

1.0 Description

The D296 and D297 are long range projected beam type smoke

detectors which consist of a separate transmitter and receiver. Internal

pointability provides coverage flexibility without the need for brackets.

Automatic Signal Synchronization and Range Adjustment reduce

installation costs. Selectable sensitivity and alarm response time

provide installation flexibility.

2.0 Specifications

• Operating Voltage: D296: 18.0 to 32.0 VDC

D297: 10.2 to 15.0 VDC

• Standby Current: D296: Receiver - 45 mA @ 24.0 VDC

Transmitter - 20 mA @ 24.0 VDC

D297: 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 to 107 m)

• Spacing (distance

between systems): Allow no more than 60 ft. (18 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: Upon cover’s removal, cover

tamper switch interrupts

transmission.

• 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 temperature

range is -22° to +130°F (-30° to +54°C).

For UL Listed installations, the range is

+32° to +130°F (0° to +54°C).

• Mounting: The units are designed to be mounted to

4 in. (10 cm) square or octagonal

electrical boxes (not supplied).

• Listings and

Approvals: UL S3019

ULC CS692

MSFM Permit #1943

NY City MEA Acceptance #MEA274-93-E

CSFM #7260-1062:106

FM Job #OX2A9.AY



• Standard

Accessories: D306 Remote Test/Indicator Plate and

Test Cable

• Options: D307 Remote Indicator Plate, D308

Field Test Kit, D309 Alignment Light, and

D1005 Test Cord.

3.0 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 1).

Figure 1 - 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 10%. If the signal falls

below the alarm threshold for the programmed alarm period, the

receiver signals an alarm (see Figure 2).

Figure 2 - Beam Obscuration

If the signal falls below the trouble threshold for more than 20 seconds,

such as might happen if the beam is blocked by a foreign object, the

receiver signals a trouble condition (see Figure 3).

Figure 3 - Beam Blockage

The receiver automatically compensates for the gradual loss of signal

due to dust/dirt build-up on the cover. After 50 percent of the signal is

lost, the receiver will indicate a trouble. When the dust/dirt build-up is

cleaned or the blockage is removed, the detector automatically goes

back to its normal operation level.

A trouble will be indicated at the receiver if the beam strength is

increased by more than 20% for greater than 20 seconds. Causes

include improper initial alignment or the removal of a partial beam

blockage at the time of alignment. Preform a fine-tune alignment

(see Section 7.3).

Summary of content (12 pages)

PAGE 1
Installation Instructions D296 and D297 Long Range Beam Smoke Detectors 1.0 Description The D296 and D297 are long range projected beam type smoke detectors which consist of a separate transmitter and receiver. Internal pointability provides coverage flexibility without the need for brackets. Automatic Signal Synchronization and Range Adjustment reduce installation costs. Selectable sensitivity and alarm response time provide installation flexibility. 2.
PAGE 2
4.0 4.2 Avoid sources of bright light 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.
PAGE 3
4.4 Provide a stable mounting surface 4.6 Consider the expected Fire load 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. When designing a fire alarm system, consider the expected fire load within the application. • Always select a stable mounting surface.
PAGE 4
6.0 WIRING Only apply power after all connections have been made and inspected. CAUTION NOTE: The D307 remote indicator should be located no further than 100 ft. (30.5 m) from the receiver and wired with 18 AWG (1.2 mm) or larger wire. The D306 may be wired up to 500 ft. (152 m) from the receiver. • Slide the Remote Indicator Connector over the pins just to the right of the receiver’s terminal strip. • Wire the transmitter and receiver terminals as follows (see Figure 6).
PAGE 5
• 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.
PAGE 6
• After completing the fine tune alignment, remove the test cable, then replace and secure the receiver's cover. 0 • Check the status of the receiver’s green LED. It should still be flashing. Figure 13 - Sensitivity Switch • 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. 7.
PAGE 7
8.3 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 necessary for proper reference voltage readings. As shown in Figure 17, if the expected smoke density is 0.5 percent per ft. (per 30 cm), the obscuration at 50 ft. (15 m) is 20 percent and at 250 ft. (95 m) it is 73 percent. 4.0 3.
PAGE 8
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 19.
PAGE 11
.0 Quick Start Installation Flow Chart Start TX = Transmitter RX = Receiver At TX unit Press the aim mode button Mount TX and RX according to the Installation Guide and applicable fire codes. • Apply power to both units • Go to TX • No LED = No power • Steady LED = Not seeing TX • Flashing Yellow = Invalid sensitivity setting (see Figure M) Recheck RX alignment and clear beam path At RX unit set sensitivity per figure M. Point the RX at the TX using its alignment sight for initial adjustment.