Fire and Gas Detection Systems | Fire Protective Signaling Systems

The equipment and all components shall be U.L., F.M., C.S.A., or equivalent approved, or listed for use in fire protective signaling systems and gas monitoring systems.

Fire and Gas Detection Systems | Fire Protective Signaling Systems

Fire and Gas Detection Systems | Fire Protective Signaling Systems

Fire and Gas Detection Systems | Fire Protective Signaling Systems

Fire and Gas Detection Panel

The main fire and gas control panel (FGCP) shall be located in the main control room. Reference Article Building Construction and Occupancy Types | Buildings Fire Protection  of the Fire and Gas Detection section for design information.

Fire Alarm and Detection Panel

The fire and alarm control panel FACP shall be located in the compounding building and office and training building.

Fire Suppression System Control Panel

  • The fire suppression system control panel (FSSCP) for the CO2 system shall be located in the sub-station near the main entrance. Reference article Fire Suppression Systems | CO2 Extinguishing Systems for design information.
  • The fire suppression system control panel (FSSCP) for the Clean Agent system shall be located in  the control/rack room near the main entrance. Reference article  Clean Agent Extinguishing Systems Specification / Requirement for design information.
  • Addressable Analog Smoke Detectors(s)
  • Smoke detectors located in the corridors and office areas shall be intelligent ionization type detectors with dual ionization chambers.
  • Smoke detectors located in the electrical areas and control rooms shall be intelligent, photoelectric-thermal type detectors utilizing the light scattering principle.
  • The addressable detector shall be dynamically supervised and uniquely identified by the FGCP. The control panel shall analyze the signal of the detector’s analog value for calibration, identification and sensitivity. Any environmental changes shall be compensated for automatically or manually with detector
    sensitivity range constantly being maintained. The photoelectric is a multi-criteria fire detector that can be field programmed for the specific hazard profile using a simple software menu selection at the panel.
  • Detector assembly to include bases with removal head, multi-color status LED, and concealed locking mechanism.
  • End of line resistors are not required on addressable signaling circuits.
  • Location and spacing of smoke detectors shall be installed in accordance with NFPA 72.

Addressable Analog Heat Detectors

  • Heat detectors located as required in article Fire Protection Requirements of Maintenance Shop Building shall be intelligent rate compensated/fixed temperature detectors rated at minimum 135 ºF.
  • The addressable detector shall be dynamically supervised and uniquely identified by the FGCP.  Detector assembly to include bases with twist lock design, LED, and locking mechanism.
  • End of line resistors are not required on addressable signaling circuits.
  • Location and spacing of heat detectors shall be installed in accordance with NFPA 72.

Addressable Manual Fire Alarm Station

  • Locate manual fire alarm stations as required. Fire alarm stations shall constructed of durable molded polycarbonate material, which shall include a back box for surface mounting and shall be colored red with white raised lettering.
  • Each station shall be single action type containing a normally open toggle switch. The switch shall be located inside the manual station so that it is activated by pulling down the lever. The lever shall remain down until the station is reset.
  • End of line resistors are not required on addressable signaling circuits.
  • Location and spacing of manual fire alarm stations shall be installed in accordance with NFPA 72.

Conventional Manual Fire Alarm Station

  • Locate conventional manual fire alarm stations as required in section Fire Alarm & Fire Protection of Sunshade Building.
    Fire alarm stations shall be explosion-proof and shall meet the electrical classification requirements as determined by the area classification drawings.
  • The stations shall include a back box for surface mounting and shall be colored red with white raised lettering.
  • Each station shall be equipped with dual action operation (lift cover and pull or push alarm type device).
  • End of line resistor is required on each manual fire alarm station hardwired to an addressable module.
  • Location and spacing of manual fire alarm stations shall be installed in accordance with NFPA 72.

UV/IR Flame Detector

The detectors shall be stand alone units (unitized), capable of utilizing 24 VDC power with Form C contacts (optional 4-20 ma output) for interfacing alarm and fault conditions with the FGCP. The detector shall be capable of responding to a fire condition even when UV or IR false alarm sources are present.

An alarm output from any single detector shall be considered a confirmed fire condition. The maximum coverage distance shall not exceed ten (10) meters and detector heads shall not be cross-zoned. The LED’s on the viewing end of the detector shall be capable of indicating normal, fire, fault, UV or IR type status by flashing a certain sequence or steady state condition. Flame detectors shall have override capabilities. The detectors shall be rated for Class I, Division 1, Group B, C and D area classification and shall be housed in a NEMA 4, copper-free aluminum housing.

Each alarm and fault contact shall be monitored individually by a single or dual input addressable module. As an option a 4-20 ma output may be utilized if the FGCP is capable of monitoring this type of input signal.

End of line resistor is required on each alarm contact hardwired to an addressable module(s).

Location and installation of these flame detectors shall be installed in accordance with NFPA 72 and  the manufacturer’s recommendations. They shall be located a minimum one (1) meter down below the ceiling and shall be located greater than one (1) meter from any artificial lighting, greater than three (3)
meters from any arc welding, and greater than thirty (30) centimeters from any radio transmitters. For best performance the detector should be located in low vibration area. 

R/IR/IR Flame Detector

The detectors shall be stand alone units (unitized), capable of utilizing 24 VDC power with Form C contacts (optional 4-20 ma output) for interfacing alarm and fault conditions with the FGCP. The detector shall be capable of responding to a fire condition even when combinations of any two (2) radiation false alarm sources are present. An alarm output from any single detector shall be considered a confirmed fire condition. The maximum coverage distance shall not exceed twenty (20) meters and detector heads shall not be cross-zoned.

The LED on the viewing end of the detector shall be capable of indicating normal, fire, or fault type status by indicating a certain displayed condition. Flame detectors shall have override capabilities. The detectors shall be rated for Class I, Division 1, Group B, C and D area classification and shall be housed in a NEMA 4, copper-free aluminum housing.

Each alarm and fault contact shall be monitored individually by a single or dual input addressable module. As an option a 4-20 ma output may be utilized if the FGCP is capable of monitoring this type of input signal.

End of line resistor is required on each alarm contact hardwired to an addressable module(s).

Location and installation of these flame detectors shall be installed in accordance with NFPA 72 and  the manufacturer’s recommendations. They shall be located a minimum one (1) meter down below the ceiling and shall be located greater than one (1) meter from any artificial lighting, greater than three (3) meters from any arc welding, and greater than thirty (30) centimeters from any radio transmitters. For best performance the detector should be located in low vibration area. 

R Combustible Gas Sensor

  • The sensors shall be stand alone units, capable of utilizing 24 VDC power with Form C contacts for interfacing high/low alarms and fault conditions with the FGCP. Sensors shall be microprocessor based utilizing a single beam, dual wavelength method of infrared absorption. The complete unit shall be a
    combination sensor/transmitter with a display unit that can be mounted locally or remotely from the sensor/transmitter. The display unit is used for field adjusting and viewing of the sensor operating parameters and for remote calibration. The sensors shall be rated for Class I, Division 1, Group B, C and D
    area classification and shall be housed in a NEMA 4X, anodized aluminum housing.
  • Fault diagnostics shall include, but not be limited to, following:
    • a. Close to minimum signal level
      b. Low supply voltage
      c. Internal system failure
      d. Failed to zero
      e. Optical path obstruction
      f. Calibration errors
  • Each sensor shall have capability to compensate for interference from atmospheric variation such as humidity, rain, dust, fog and steam.
  • Each sensor shall be capable of transmitting a 4 – 20 mA signal proportional to 0 to 100% LEL gas concentration.
  • Sensors shall be provided with manufacturer approved gassing guards for remote calibration. 
  • The gas sensors hi/lo alarm and fault outputs shall be monitored by an addressable module(s), which shall be programmed with a peculiar address point of each alarm condition for proper identification at the main FGCP. The module(s) shall communicate to the FGCP, via an analog signaling line circuit or to the Plant Safety PLC, via 4 – 20 mA signal.
  • End of line resistor is required on each alarm contact hardwired to an addressable module(s) if communicating to the FGCP.
  • Location and installation of combustible gas sensor shall be installed in accordance with Table 2 of the Fire and Gas Detection Standard (F-01-G-01). and per the manufacturer’s recommendations. They should not be located near any radio transmitters or high heat sources.

Leave a Reply