SYSTEM SENSOR PC351 (01) PDF Document

The specifications for the SYSTEM SENSOR PC351 are as follows:

*Refer to your isolator base/module manual for isolator calculation instructions.

The SYSTEM SENSOR PC351 is:

• UL 2075 listed for Carbon Monoxide
• UL 268 listed for Open Air Protection

This sensor must be installed in compliance with the control panel system installation manual. For local audible indication of a fire and/or carbon monoxide alarm, it is recommended to install the multi-criteria photoelectric and carbon monoxide (CO) sensor into a APB200 series sounder base. If a local audible device is not used, care should be taken to develop a proper response plan. The installation must meet the requirements of the Authority Having Jurisdiction (AHJ). Sensors offer maximum performance when installed in compliance with the National Fire Protection Association (NFPA); see NFPA 72 and NFPA 720. For a complete list of compatible bases, refer to the Base/Sensor Cross Reference Chart at systemsensor.com.

Model PC351 is a plug-in type multi-criteria smoke sensor that offers a photoelectric sensing chamber combined with a carbon monoxide (CO) sensor as well as a carbon monoxide detector. All sensors transmit an analog representation of smoke and/or carbon monoxide density over a communication line to a control panel. Rotary dial switches are provided for setting the sensor’s address.

Two LEDs on the sensor are controlled by the panel to indicate sensor status. An output is provided for connection to an optional remote LED annunciator (P/N RA100Z).

The possible features available to the SYSTEM SENSOR PC351, if supported by the control unit in Advanced Protocol mode are:

1. The sensor’s LEDs can operate in three ways-on, off, and blinking-and they can be set to red, green, or amber. This is controlled by the panel.

2. The remote output may be synchronized to the LED operation or controlled independent of the LEDs.

3. Devices are point addressable up to 159 addresses.

System Sensor recommends spacing smoke detectors in compliance with NFPA 72. In low air flow applications with smooth ceilings, space sensors 30 feet apart (9.1 m). For specific information regarding sensor spacing, placement, and special applications, refer to NFPA 72 and the System Smoke Detector Application Guide, available from System Sensor. For specific information regarding CO detector spacing, placement and special applications, refer to NFPA 72, NFPA 720, and the System-Connected Carbon Monoxide Detectors Application Guide also available from System Sensor.

Remove power from the communication line before installing sensors. Wire the sensor base (supplied separately) per the base wiring diagram. (See Figure 1.)

The steps for installing the SYSTEM SENSOR PC351 after wiring the base are:

1. Set the desired address on the sensor address switches. (See Figure 2.)

2. Install the sensor into the sensor base. Push the sensor into the base while turning it clockwise to secure it in place.

3. After all sensors have been installed, apply power to the control panel and activate the communication line.

4. Test the sensor(s) as described in the TESTING section of this manual.

Do not loop wire under terminal 1 or 2. Break wire run to provide supervision of connections.

The symptoms for a healthy adult exposed to 200 ppm CO for 2-3 hours are a mild headache.

The symptoms for a healthy adult exposed to 400 ppm CO for 1-2 hours are headache and nausea.

The symptoms for a healthy adult exposed to 800 ppm CO are headache, nausea, and dizziness after 45 minutes of exposure; collapse and unconsciousness after 2 hours of exposure.

The alarm thresholds for the SYSTEM SENSOR PC351 are as follows:

If the carbon monoxide detector on the SYSTEM SENSOR PC351 goes into alarm:

Immediately move to a spot where fresh air is available, preferably outdoors.

The SYSTEM SENSOR PC351 can be functionally tested with a test magnet. The test magnet electronically simulates smoke in the sensing chamber, testing the sensor electronics and connections to the control panel.

a. Hold the test magnet in the magnet test area as shown in Figure 3. The sensor should alarm the panel.

NOTE: The magnet test initiates an approximately 10 minute period when the detector’s signal processing software routines are not active.

The SYSTEM SENSOR PC351 can be placed into test mode through either of the following methods:

a. Put the device into test mode by holding a test magnet in the magnet test area as shown in Figure 3 for 6-12 seconds. NOTE: If the magnet is held in place for too long the fire alarm test function will be triggered. (See Magnet Test, above.) Reset the panel and proceed with testing the smoke entry portion of the device.

b. Perform smoke entry testing immediately following the magnet test. The magnet test initiates an approximately 10 minute period when the detector’s signal processing software routines are not active. Once in test mode, test the smoke detector using one of the tested and approved aerosol smoke products. Refer to the manufacturer’s published instructions for proper use of the canned smoke agent. When used properly, the canned smoke agent will cause the smoke detector to go into alarm.

Tested and approved aerosol smoke products include:

Testifire by SDi provides testing of the photoelectric and CO sensors. Consult the manufacturer’s published instructions for complete usage instructions. A sensor that fails any of these tests may need to be cleaned as described under CLEANING, and retested. When testing is complete, restore the system to normal operation and notify the proper authorities that the system is back in operation.

A canned CO testing agent may be used to verify the detector’s ability to sense CO. Carbon Monoxide alarm thresholds are designed around CO concentrations over time, as defined in UL standard 2034. Therefore, a single burst of CO test agent will not immediately place the detector into an alarm condition. In order to perform functional testing of the CO sensor, the device must be placed into test mode. Test mode eliminates the time and concentration requirements needed for alarm and allows the CO sensor to be tested. The device can be placed into test mode through either of the following methods.

a. Put the device into test mode by holding a test magnet in the magnet test area as shown in Figure 3 for 6-12 seconds. NOTE: If the magnet is held in place for too long the fire alarm test function will be triggered. Reset the panel and proceed with testing the CO portion of the device.

b. Perform functional gas entry testing immediately following the magnet test. The magnet test initiates an approximately 10 minute period when the detector’s signal processing software routines are not active. Once in test mode, test the CO sensor using a tested and approved canned CO testing agent. A tested and approved canned CO testing agent is Solo detector testers model C6 CO Detector Tester available from SDi. Complete the CO sensor testing as follows: Spray a UL approved CO agent into the top of the detector near the CO sensor opening for at least 1 second. CO sensor opening is indicated by a triangle on the sensor cover. (See Figure 3.) Use the applicator straw included with the CO agent to more efficiently direct the CO into the detection cell during testing. The detector will go into alarm if gas entry is successful. It may take up to 1 minute for the device to alarm. Once the detector is in alarm allow 5 minutes for the CO to clear and exit the detector. The detector will automatically enable the signal processing after 10 minutes. Testing the detector will activate the alarm relay and send a signal to the panel.

The steps for cleaning the SYSTEM SENSOR PC351 are:

1. Remove the sensor to be cleaned from the system.

2. Remove the sensor cover by pressing firmly on each of the four removal tabs that hold the cover in place. (See Figure 4.)

3. Vacuum the screen carefully without removing it. If further cleaning is required continue with Step 4, otherwise skip to Step 7.

4. Remove the chamber cover/screen assembly by pulling it straight out.

5. Use a vacuum cleaner or compressed air to remove dust and debris from the sensing chamber.

6. Reinstall the chamber cover/screen assembly by aligning the arrows on the top with the two round-top posts on the sensing chamber, and gently pressing it until it fits securely.

7. Replace the cover using the LEDs to align the cover and then gently pushing it until it locks into place. NOTE: Make sure that the thermistors do not become bent under the cover.

8. Reinstall the detector.

9. Test the detector as described in TESTING.

10. Reconnect disabled circuits.

11. Notify the proper authorities that the system is back on line.

The limitations of the carbon monoxide detector in the SYSTEM SENSOR PC351 are:

• This carbon monoxide detector is designed for indoor use only. Do not expose to rain or moisture. Do not knock or drop the detector. The detector will not protect against the risk of carbon monoxide poisoning if not properly wired. The detector will only indicate the presence of carbon monoxide gas at the sensor. Carbon monoxide gas may be present in other areas.
• This carbon monoxide detector is NOT:
• Designed to detect any gas other than carbon monoxide
• To be seen as a substitute for the proper servicing of fuel-burning appliances or the sweeping of chimneys.
• To be used on an intermittent basis, or as a portable alarm for the spillage of combustion products from fuel-burning appliances or chimneys.

Carbon monoxide gas is a highly poisonous gas which is released when fuels are burnt. It is invisible, has no smell and is therefore impossible to detect with the human senses. Under normal conditions in a room where fuel burning appliances are well maintained and correctly ventilated, the amount of carbon monoxide released into the room by appliances should not be dangerous.

When configured at the fire alarm control panel, this detector is capable of operating in a special application mode such that it has a higher sensitivity than is normally allowed by UL 268 for areas where early warning is important. In this mode, the detector does not comply with the Cooking Nuisance Smoke Test. Detectors (Sampling ports) set to the special application mode are not suitable for use in areas where cooking appliances may be used. If cooking appliances are used within the protected space, a normal application detector or normal application mode must be used for that area.

Special application mode is not for general use and the detector may be more prone to false alarms if used in unsuitable environments. While no list is all-inclusive, some examples of unsuitable environments for special application mode are areas with airborne particulate or aerosols including sawing, drilling, and grinding operations, textile or agricultural processing, or areas with engines that are not vented to the outside. A complete list of aerosol and particulate sources is available in the Annex of NFPA 72.

Suitable environments for special application mode could include early warning for hospitals, museums, assisted living and other areas that do not have airborne particulate or aerosols.

Refer to the fire alarm control panel documentation for information on how to configure the detector for special application mode.

Tested and approved aerosol smoke products include:

The CO cell has an expected lifetime of approximately ten years. The detector is programmed to signal the approach of end of this lifetime to the control panel. The CO cell is not a field replaceable component. The smoke sensor will continue to operate using the photoelectric sensing element even though the CO cell is no longer operational. The CO detector will not operate once the CO cell has reached its end of life.

Install the sensor into the sensor base. Push the sensor into the base while turning it clockwise to secure it in place.

Remove power from the communication line before installing sensors.