NOTIFIER LPX-751 Intelligent Laser Smoke Sensor Instruction Manual

NOTIFIER LPX-751 Intelligent Laser Smoke Sensor

LASER SAFETY INFORMATION

This smoke detector does not produce any hazardous laser radiation and is certified as a Class 1 laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968. Any radiation emitted inside the smoke detector is completely within the protective housings and external covers. The laser beam cannot escape from the detector during any phase of operation. The Center of Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration implemented regula-tions for laser products on August 2, 1976. These regulations apply to laser products manufactured after August 1, 1976. Compliance is mandatory for products marketed in the United States.

CAUTION
Use of controls, adjustments, or performance of procedures other than those specified in this manual may result in hazardous radiation exposure.

INSTALLATION INSTRUCTIONS

Before installing this sensor, please thoroughly read the System Smoke Detector Application Guide, which provides detailed information on detector spacing, placement, zoning, wiring, and special applications. Copies of this manual are available from Notifier. This sensor must be installed in compliance with the control panel manufacturer’s installation man-ual. Sensors offer maximum performance when installed in compliance with National Fire Protection Association (NFPA); see NFPA 72.
NOTICE: This manual should be left with the owner/user of this equipment.
IMPORTANT: This sensor must be tested and maintained regularly following NFPA 72 requirements. It should be cleaned at least once a year.

GENERAL DESCRIPTION

Model LPX-751 is a plug-in smoke sensor that combines a laser photoelectronic sensing chamber with addressable analog communications. The use of a laser diode provides substantial improvements in signal-to-noise ratio compared to a traditional LED light source. The sensor transmits an analog representation of smoke density over a communication line to a control panel. Rotary decade switches are provided for setting the sensor address (see figure 2). The sensor has two multicolored LEDs controlled by the panel to indicate sensor status. Flashing green indicates normal operation and steady red indicates alarm, prealarm, or trouble. An output is provided for connection to an optional remote LED annunciator (Model RA400Z).

SPECIFICATIONS

• Operating Voltage Range: 15 to 32 VDC Peak
• Max. Standby Current: 230μA @ 24 VDC (no communication)
• Max. Average Standby Current: 330μA (one communication every 5 seconds with LED blink enabled)
• Max. Alarm Current (LED on): 6.5mA @ 24 VDC
• Operating Humidity Range: 10% to 93% Relative Humidity, noncondensing
• Operating Temperature Range: 0° to 37.8°C (32° to 100°F); U.S. –10° to 50°C (14 to 122°F); Europe
• Height: 1.7 inches (43mm) installed in B710LP base
• Diameter: 6.1 inches (155mm) installed in B710LP base 4.1 inches (104mm) installed in B501 base
• Weight: 3.6 oz. (102 g)

SPACING

Notifier recommends spacing sensors in compliance with NFPA 72. In low air flow applications with smooth ceilings, space sensors 30 feet apart. For specific information regarding sensor spacing, placement, and special applications, refer to NFPA 72 or Notifier’s System Smoke Detector Application Guide, available at no charge from Notifier.

WIRING INSTRUCTIONS

All wiring must be installed in compliance with the National Electric Code (NEC), applicable local codes, and any spe-cial requirements of the Authority Having Jurisdiction (AHJ). Proper wire gauges should be used. The installation wires should be color-coded to limit wiring mistakes and ease system troubleshooting. Improper connections will prevent a system from responding properly in the event of a fire.

Remove power from the communication line before installing sensors.

All wiring must conform to applicable local codes, ordinances, and regulations.

1. Wire the sensor base (supplied separately) per the wiring diagram (see figure 1).
2. Set the desired address on the sensor address switches.
3. Install the sensor in the sensor base. Push the sensor into the base while turning it clockwise to secure it in place.
4. After all sensors have been installed, apply power to the control unit and activate the communication line.
5. Test the sensor(s) as described in the TESTING section of this manual.

CAUTION

Dust covers provide limited protection against airborne dust particles during shipment. Dust covers must be removed before the sensors can sense smoke. Remove sensors prior to heavy remodeling or construction.

TESTING

Before testing, notify the proper authorities that the system is undergoing maintenance and will be temporarily out of ser-vice. Also, disable the system to prevent unwanted alarms. All sensors must be tested after installation and periodically thereafter. Testing methods must satisfy the Authority Having Jurisdiction (AHJ). Sensors offer maximum performance when tested and maintained in compliance with NFPA 72. The sensor can be tested in the following ways:

A. Functional Magnet Test (Model M02-04-01)
This sensor can be functionally tested using a test magnet. The test magnet electronically simulates smoke in the sensing chamber, testing the sensor electronics and connections to the control panel.

1. Hold the test magnet in the magnet test area as shown (see figure 3).
2. The sensor should alarm the panel.
   Two LEDs on the sensor are controlled by the panel to indicate sensor status. Coded signals transmitted from the panel can control LED color, as well as to “FLASH”, latch “ON”, or latch “OFF”. Refer to the control panel manufacturer’s technical documentation for sensor LED status operation.

B. Smoke Entry: Aerosol Generator (Gemini 501)
The GEMINI model 501 aerosol generator can be used for smoke entry testing. Set the generator to represent 4%/ft. to 5%/ft. obscuration as described in the GEMINI 501 manual. Using the bowl shaped applicator, apply aerosol until the panel alarms. Smoke entry can also be simulated from the Notifier control panel.

A sensor that fails any of these tests should be cleaned as described under CLEANING, and retested. If the sensor fails after cleaning, it must be replaced and returned for repair. When testing is complete, restore the system to normal operation and notify the proper authorities that the system is back

HIGH SENSITIVITY SETTING

The use of the 0.03% to 0.5% per foot sensitivity setting requires a 90-day test period to ensure that the detector’s environment is suitable for this setting. The following steps must be followed to meet Notifier and UL requirements for this high sensitivity application:

1. Each detector intended for 0.03% to 0.5% per foot alarm application shall have its initial alarm setting set for 0.5% obscuration per foot alarm level. The initial prealarm setting for the detector shall be set to the intended alarm setting of the system. Prealarm shall be set for nonlatching operation.
2. Detectors set at 0.03% to 0.5% per foot are intended for use in smoke-free, environmentally controlled applications, such as computer rooms and clean rooms. In order to determine if an environment is suitable for installation, the detectors shall be operated continuously for 90 days with all environmental factors, including temperature, humidity, air flow, occupancy, etc., similar to the intended application for these detectors. An electronic history file or printer shall be used to record all events associated with the detectors under testing.
3. At the end of 90 days, the results of the test shall be inspected by an authorized Notifier representative or the end user, if trained by an authorized Notifier representative. If no alarms or prealarms are recorded for the detectors under testing, the system may be set to the tested prealarm level in the 0.03% to 0.5% per foot range.

NOTE: The LPX-751 has been approved by LPCB at its least sensitive setting. However, it is still undergoing performance testing to gain approval at the higher sensitivity settings. This in no way affects the LPX-751’s suitability for use in high sensitivity applications, but is a reflection of the state-of-the-art nature of high sensitivity detectors and their lack of an agreed European standard or test procedure.

CLEANING

Before cleaning, notify the proper authorities that the system is undergoing maintenance, and will be temporarily out of service. Disable the system to prevent unwanted alarms.

1. Remove the sensor to be cleaned from the system.
2. Remove the sensor cover using a small standard screwdriver to release each of the four cover removal tabs that hold the cover in place (see figure 4).
3. Vacuum the outside of the screen carefully without removing it.
4. Remove the screen assembly by pulling it straight away from the sensing chamber base. Replacement screens are available (Model S08-33).
5. Use a vacuum or clean compressed air to remove dust and debris from the sensing chamber.
6. Reinstall or replace the screen assembly. Align the arrow on the screen assembly with the arrow on the sensor that points toward the sensing chamber. Push the screen down carefully until it snaps into place.
7. Reinstall the sensor cover using the LEDs to align the cover with the sensor. Carefully snap the cover into place.
8. When all the sensors have been cleaned, restore system opera-tion for testing purposes and test the sensors as described in the TESTING section of this manual.

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