Sensors and Detectors

ALK-V Photoelectric Smoke Sensor

ALK-V Phototelectric Smoke Detector

APPLICATION

The HOCHIKI America ALK-V Photoelectric Smoke Sensor is particularly suited to detecting optically dense smoke typical of fires involving materials such as soft furnishings, plastic, foam or other similar materials which tend to smolder and produce large visible smoke particles. Hochiki’s unique design allows fast response to flaming fires as well as smoldering fires while minimizing false alarms.

OPERATION

The detection chamber consists of a light emitting diode (LED) and photodiode arrangement. The chamber is designed such that light emitted by the LED cannot normally reach the photodiode. In the event of fire, particles of smoke enter the chamber and scatter the light. As the smoke level increases, the scattering effect increases, causing more light to hit the photodiode. The chamber contains a unique design which allows smoke to enter the chamber while preventing external light from affecting the photodiode. The photodiode input level is sampled to sense smoke density. When the smoke density exceeds a preset threshold the sensor transmits an interrupt to the fire control panel indicating a fire condition. The fire alarm control panel can adjust the sensor threshold to compensate for contamination. Up to 127 devices are permitted on each loop. A sensor address can be set by a hand held programming unit. The sensor mounts to an electronics free base and incorporates a locking mechanism for secure installation. The base provides mounting slots, terminals for field wiring and a third contact for a remote indicator/LED. The sensor incorporates dual LED’s for easy viewing of sensor status.

ENGINEERING SPECIFICATIONS

The contractor shall furnish and install where indicated on the plans, photoelectric sensors HOCHIKI America Model ALK-V. The combination sensor head and twist lock base shall be UL listed compatible with a UL listed fire alarm control panel.

STANDARD FEATURES

• Low Profile – Only 2.0″ high, including base
• Simple and reliable device addressing method
• Automatic compensation for sensor contamination
• Built-in fire test feature
• Uses the noise immune Digital Communication Protocol (DCP), which utilizes interrupts for fast response to fires
• Two built-in power/alarm LED’s
• Non-directional smoke chamber
• Vandal resistant security locking feature
• Removable smoke labyrinth for cleaning or replacement
• Compatible with the AIE-EA ionization detector & the ATG-EA heat detector
• Backwards compatible with ALG
• Highly resistant to false alarms caused by steam


ALK-V Photoelectric Smoke Sensor

ALK-V Phototelectric Smoke Detector

APPLICATION

The HOCHIKI America ALK-V Photoelectric Smoke Sensor is particularly suited to detecting optically dense smoke typical of fires involving materials such as soft furnishings, plastic, foam or other similar materials which tend to smolder and produce large visible smoke particles. Hochiki’s unique design allows fast response to flaming fires as well as smoldering fires while minimizing false alarms.

OPERATION

The detection chamber consists of a light emitting diode (LED) and photodiode arrangement. The chamber is designed such that light emitted by the LED cannot normally reach the photodiode. In the event of fire, particles of smoke enter the chamber and scatter the light. As the smoke level increases, the scattering effect increases, causing more light to hit the photodiode. The chamber contains a unique design which allows smoke to enter the chamber while preventing external light from affecting the photodiode. The photodiode input level is sampled to sense smoke density. When the smoke density exceeds a preset threshold the sensor transmits an interrupt to the fire control panel indicating a fire condition. The fire alarm control panel can adjust the sensor threshold to compensate for contamination. Up to 127 devices are permitted on each loop. A sensor address can be set by a hand held programming unit. The sensor mounts to an electronics free base and incorporates a locking mechanism for secure installation. The base provides mounting slots, terminals for field wiring and a third contact for a remote indicator/LED. The sensor incorporates dual LED’s for easy viewing of sensor status.

ENGINEERING SPECIFICATIONS

The contractor shall furnish and install where indicated on the plans, photoelectric sensors HOCHIKI America Model ALK-V. The combination sensor head and twist lock base shall be UL listed compatible with a UL listed fire alarm control panel.

STANDARD FEATURES

• Low Profile – Only 2.0″ high, including base
• Simple and reliable device addressing method
• Automatic compensation for sensor contamination
• Built-in fire test feature
• Uses the noise immune Digital Communication Protocol
(DCP), which utilizes interrupts for fast response to fires
• Two built-in power/alarm LED’s
• Non-directional smoke chamber
• Vandal resistant security locking feature
• Removable smoke labyrinth for cleaning or replacement
• Compatible with the AIE-EA ionization detector & the ATG-EA heat detector
• Backwards compatible with ALG
• Highly resistant to false alarms caused by steam


AIE-EA Ionization Smoke Sensor

AIE-EA Ionization Smoke Detector

APPLICATION

The HOCHIKI America AIE-EA Ionization smoke sensor has a responsive and highly stable operation that gives it an extremely wide range of uses. The AIE-EA can be used in areas where early warning of trouble from superheated or flaming combustibles is expected. The AIEEA is also constructed to be effectively used where outside RFI (Radio Frequency Interference) and other electrical interference is expected to be encountered.

OPERATION

A single radioactive source ionizes two chambers which causes a small DC current to flow between the electrodes in each chamber. Smoke can freely enter the outer chamber while the inner chamber is virtually sealed to smoke. Smoke entering the outer chamber causes a reduction in the DC current, the imbalance between the two chambers is proportional to the smoke density. The two chamber design is utilized to compensate for changes in atmospheric and environmental conditions. When the sensed input value exceeds a predetermined threshold, an interrupt is issued to the control panel indicating a fire alarm.

The fire alarm control panel can adjust the sensor threshold to compensate for contamination. Up to 127 devices are permitted on each loop. A sensor address can be set by a hand held programming unit. The sensor mounts to an electronics free base and incorporates a locking mechanism for secure installation. The base provides mounting slots, terminals for field wiring and a third contact for a remote indicator/LED. The sensor incorporates dual LED’s for easy viewing of sensor status.

ENGINEERING SPECIFICATIONS

The contractor shall furnish and install where indicated on the plans, dual-chamber, ionization smoke sensor HOCHIKI America AIE-EA. The combination sensor head and twist-lock base shall be UL listed compatible with a UL listed fire alarm control panel.

STANDARD FEATURES

• Low Profile – Only 2.22″ high, including base
• Simple and reliable device addressing method
• Automatic compensation for sensor contamination
• Built in fire test feature
• Uses the noise immune Digital Communication Protocol (DCP), which utilizes interrupts for fast response to fires


ATG-EA Heat Sensor

ATG-EA Heat Sensor

APPLICATION

The HOCHIKI America ATG-EA Sensor provides accurate temperature measurement data to the fire alarm control panel. This sensor is particularly suited to environments where smoke detectors are unsuitable because of the precense of system or cooking fumes such as in a kitchen.

 

OPERATION

The ATG-EA Heat sensor incorporates a highly linear thermistor circuit, with the thermistor mounted externally. The specially designed cover protects the thermistor while allowing maximum air flow. The thermistor circuit produces a voltage proportional to temperature which is scaled, and transmitted as a digitally encoded value to the control panel. When the ambient temperature exceeds a pre-programmed threshold (fixed
temperature), the sensor transmits an interrupt to the control panel indicating a fire alarm.

The fire alarm control panel can adjust the sensor threshold for different Standard’s requirements. Up to 127 devices are permitted on each loop. A sensor address can be set by a hand-held programming unit. The sensor mounts to an electronics free base and incorporates a locking mechanism secure installation. The base provides mounting slots, terminals for field wiring, and a third contact for a remote indicator/LED. The sensor incorporates dual LED’s for easy viewing of sensor status.

ENGINEERING SPECIFICATIONS

Heat sensors are installed in accordance with NFPA (National Fire Protection Association) 72, the UL Listed Spacing Requirements and the rules and regulations set forth by the local authorities having jurisdiction. Automatic heat sensors shall be Underwriters Laboratories listed.

The base shall permit direct interchange with the HOCHIKI America AIE-EA ionization type smoke sensor, and the ALG-V photoelectric smoke sensor. The vandal-resistant, security locking feature shall be used in those areas as indicated on the drawing. The locking feature shall be optional and can be implemented when required. It shall be possible to perform a functional test of the sensor without generating heat. The test method shall simulate the effects of heat on the device to insure testing of internal circuitry.

STANDARD FEATURES

• Low Profile – Only 2.0″ high, including base
• Simple and reliable device addressing method
• Uses the noise immune Digital Communication Protocol (DCP), which utilizes interrupts for fast response to fires
• Adjustable threshold temperature 135°F – 150°F (determined by panel)


SLR-835B Direct-wire Photoelectric Smoke Detector

SLR-835B Direct-wire Photoelectric Smoke Detector

APPLICATION

The HOCHIKI America SLR-835B Series can be used in all areas where Photoelectric Smoke Detectors are required. It is suited for smoldering or flaming fires.

OPERATION

The SLR-835B Series photoelectric smoke detector utilizes two bicolored LED’s for indication of status. In a normal standby condition the LED’s flash Green every 3 seconds. When the detector senses that its sensitivity has drifted outside the UL listed sensitivity window the LED’s will flash Red every 3 seconds. When the detector senses smoke and goes into alarm the status LED’s will latch on Red.

The unit is comprised of an LED light source and silicon photo diode receiving element. In a normal standby condition, the receiving element receives no light from pulsing light source. In the event of fire, smoke enters the detector and light is reflected from the smoke particles to the receiving element. The light received is converted to an electronic signal. Signals are processed in the comparator, and when two consecutive signals exceeding the basic level are received within a specific period of
time, the time delay circuit triggers the SCR switch to activate the alarm signal. The status LED lights continuously during alarm period.

ENGINEERING SPECIFICATIONS

The contractor shall furnish and install where indicated on the plans HOCHIKI America SLR-835B direct-wire photoelectric smoke detectors. The detector shall be UL listed compatible (2-wire model) with a UL listed fire alarm panel.

The smoke detector shall have green flashing status LED’s for visual supervision. When the detector is actuated, the flashing LED’s will turn red and latch on steady. The detector may be reset by actuating the control panel reset switch.

The detector shall have a sensitivity window verification feature. If the sensitivity of the detector drifts outside its approved window the LED’s will flash red to indicate an out of sensitivity condition. The vandal resistant, security locking feature shall be used in those areas as indicated on the drawing. The locking feature shall be field selectable.
It shall be possible to perform a functional test of the detector without the need of generating smoke. The method shall simulate effects of products of combustion in the chamber to ensure testing of detector circuits.

Voltage and RF transient suppression techniques shall be employed to minimize false alarm potential.

STANDARD FEATURES

• Low Profile – Only 2.0″ High
• 2 or 4 Wire Models
• Highly Stable Operation, RF/Transient Protection
• Two built-in power/sensitivity supervision/alarm LED’s
• Non-Directional Smoke Chamber
• Vandal Resistant Security Locking Feature
• Removable smoke labyrinth for cleaning or replacement
• Automatic Sensitivity window verification function meets outlined requirements in NFPA 72, Inspection,Testing and Maintenance


SLR-835BH Direct-wire Photoelectric Heat Smoke Detector

SLR-835BH Direct-wire Photoelectric Heat Smoke Detector

DESCRIPTION

The SLR-835BH Series photoelectric smoke detector utilizes two \ bicolored LEDs for indication of status. In a normal standby condition the LEDs flash Green every 3 seconds. When the detector senses that its sensitivity has drifted outside the UL listed sensitivity window the LEDs will flash Red every 3 seconds. When the detector senses smoke and goes into alarm the status LEDs will latch on Red.

The unit is comprised of an LED light source and silicon photo diode receiving element. In a normal standby condition, the receiving element receives no light from pulsing light source. In the event of fire, smoke enters the detector and light is reflected from the smoke particles to the receiving element. The light received is converted to an electronic signal. Signals are processed in the comparator, and when two consecutive signals exceeding the basic level are received within a specific period of time, the time delay circuit triggers the SCR switch to activate the alarm signal. The Status LED lights continuously during alarm period.

ENGINEERING SPECIFICATIONS

The contractor shall furnish and install where indicated on the plans HOCHIKI America SLR-835BH baseless photoelectric smoke detectors. The combination detector head shall be UL listed compatible with an UL listed fire alarm panel. The smoke detector shall have flashing status LED for visual supervision. When the detector is actuated, the flashing LED will latch on steady at full brilliance. The detector may be reset by actuating the control panel reset switch.

The detector shall have a sensitivity window verification feature.
The vandal resistant, security locking feature shall be used in those areas as indicated on the drawing. The locking feature shall be field selectable.

It shall be possible to perform a functional test of the detector without the need of generating smoke. The method shall simulate effects of products of combustion in the chamber to ensure testing of detector circuits.

Voltage and RF transient suppression techniques shall be employed to minimize false alarm potential.

STANDARD FEATURES

• Low Profile – Only 2.375″ High.
• 2 or 4 Wire Models
• 135° F Latching Heat Sensor
• Highly Stable Operation, RF/Transient Protection
• Two built-in power/sensitivity supervision/alarm LED’s
• Non-Directional Smoke Chamber
• Vandal Resistant Security Locking Feature
• Removable smoke labyrinth for cleaning or replacement
• Automatic Sensitivity window verification function meets outlined requirements in NFPA 72, Inspection,Testing and Maintenance.


SLR-835/SLR-835H Photoelectric Smoke Detector

SLR-835 Photoelectric Smoke Detector

SLR-835

SLR-835H Photoelectric Smoke Detector

SLR-835H

APPLICATION

The HOCHIKI America SLR-835/-835H can be used in all areas where photoelectric smoke detectors are required. It is suited for fires ranging from smoldering to flaming fires. NS4 Series, NS6 Series, HSC-4R or HSC-(X)R Style bases may be used with the SLR-835/-835H.

OPERATION

The SLR-835/-835H Photoelectric Smoke Detector utilizes two bicolored LEDs for indication of status. In a normal standby condition the LEDs flash green every 3 seconds. When the detector senses that its sensitivity has drifted outside the UL listed sensitivity window the LEDs will flash
Red every 3 seconds. When the detector senses smoke and goes into alarm the status LEDs will latch on Red. The detector utilizes an infrared LED light source and silicon photo diode receiving element in the smoke chamber. In a normal standby condition, the receiving element receives no light from the pulsing LED light source. In the event of a fire, smoke enters the detector smoke chamber and light is reflected from the smoke particles to the receiving element. The light received is converted into an electronic signal. Signals are processed and compared to a reference level, and when two consecutive signals exceeding the reference level are received within a specified period of time, the time delay circuit triggers the SCR switch to activate the alarm signal. The status LEDs light continuously during the alarm period.

ENGINEERING SPECIFICATIONS

The contractor shall furnish and install where indicated on the plans, Hochiki America Model SLR-835 Photoelectric smoke detectors. The combination detector head and twist-lock base shall be UL listed compatible with a UL listed fire alarm panel. When the supply power is 24VDC, the base shall permit direct interchange with Hochiki America SLR-24H combination photoelectric/heat detector, SLR-24 photoelectric smoke detector, SIJ-24 ionization type smoke detector and DCD-135/190heat detector.

The base shall be the appropriate twist-lock base NS4 Series, NS6 Series, HSC-4R, or HSC-(X)R Series. In the event of partial or complete retrofit, the SLR-835, SLR-835H may be used in conjunction with, or as a replacement for, Hochiki America detectors ( SLK-835H, SLK-24F, SLK-24FH and the SIH-24F) on most HSB and HSC base application.

The smoke detector shall have two flashing status LEDs for visual supervision. When the detector is in standby condition the LEDs will flash Green. When the detector is outside the UL listed sensitivity window the LEDs will flash Red. When the detector is actuated, the flashing LEDs will latch on Red. The detector may be reset by actuating the control panel reset switch.

The sensitivity of the detector shall be capable of being measured. It shall be possible to perform a functional test of the detector without the need of generating smoke. The sensitivity of the detector shall be monitored automatically and continuously to verify that it is operating within the listed sensitivity range.

To facilitate installation, the detector shall be non-polarized. Voltage and RF transient suppression techniques shall be employed to minimize false alarm potential. Auxiliary SPDT relays shall be installed where indicated on the drawing. The locking feature shall be field removable when not required.

STANDARD FEATURES

• Low Profile – Only 1.8″ high (2.2″ 835H)
• 2 or 4 wire base compatibility, relay bases available
• 135°F latching heat sensor (835H only)
• Heat sensor protected by a built-in guard (835H only)
• Highly stable operation, RF/Transient protection
• Low standby current
• Two built-in power/sensitivity supervision/alarm LEDs
• Non-directional smoke chamber
• Vandal resistant security locking feature
• Removable smoke labyrinth for cleaning or replacement
• Backwards compatible with Hochiki SLK and SIH detectors
• Automatic Sensitivity window verification function meets outline requirements in the NFPA 72 Inspection Testing and Maintenance, Chapter 7


SLR-24V Photoelectric Smoke Detector

SLR-24V Photoelectric Smoke Detector

APPLICATION

The SLR-24V can be used in all areas where Photoelectric Smoke Detectors are required. The wide range smoke chamber makes the SLR-24V well suited for fires ranging from smoldering to flaming fires. NS-4 Series, NS-6 Series, HSC-4R or HSC-xxx R Style bases may be used with the SLR-24V. Current interchangeable/compatible devices are the SIJ-24 ionization detector, the SLR-24H photoelectric detector with heat sensor, and the DCD-135/190 heat detectors. All NS conventional devices are mechanically compatible with Hochiki America HSB, HSC and YBA type bases which may have been used in previous installations. Please check individual panel listings for compatible bases.

OPERATION

The SLR-24V photoelectric smoke detector utilizes two bicolored LEDs for indication of status. In a normal standby condition the LEDs flash Green every 3 seconds. When the detector senses that its sensitivity has drifted outside the UL listed sensitivity window the LEDs will flash Red every 3 seconds. When the detector senses smoke and goes into alarm the status LEDs will latch on Red.

The detector utilizes an infrared LED light source and silicon photo diode receiving element in the smoke chamber. In a normal standby condition, the receiving element receives no light from the pulsing LED light source.

In the event of a fire, smoke enters the detector smoke chamber and light is reflected from the smoke particles to the receiving element. The light received is converted into an electronic signal. Signals are processed and compared to a reference level, and when two consecutive signals exceeding the reference level are received within a specified period of time, the time delay circuit triggers the SCR switch to activate the alarm signal. The status LEDs light continuously during the alarm period.

ENGINEERING SPECIFICATIONS

The contractor shall furnish and install where indicated on the plans, Hochiki America Model SLR-24V photoelectric smoke detectors. The combination detector head and twist-lock base shall be UL listed compatible with a UL listed fire alarm panel. The base shall permit direct interchange with Hochiki America SLR-24H combination photoelectric/heat detector, SIJ-24 ionization type smoke detector and/or DCD-135/190 fixed temperature/rate-of-rise heat detectors. The base shall be appropriate twist-lock base NS-4 Series, NS-6 Series, HSC-4R, or HSC-xxx R. In the event of partial or complete retrofit, the SLR-24V maybe used in conjunction with, or as a replacement for, Hochiki America detectors (SLK-24, SLK-24FH and the SIH-24) on most HSB and HSC base applications.

The smoke detector shall have two flashing status LEDs for visual supervision. When the detector is in standby condition the LEDs will flash Green. When the detector is outside the UL listed sensitivity window the LEDs will flash Red. When the detector is actuated, the flashing LEDs will latch on Red. The detector may be reset by actuating the control panel reset switch.

The sensitivity of the detector shall be capable of being measured. It shall be possible to perform a functional test of the detector without the need of generating smoke. The sensitivity of the detector shall be monitored automatically and continuously to verify that it is operating within the listed sensitivity range.

To facilitate installation, the detector shall be non-polarized. Voltage and RF transient suppression techniques shall be employed to minimize false alarm potential. Auxiliary SPDT relays shall be installed where indicated.

STANDARD FEATURES

• Low profile, 1.8″ high (with base)
• 2 or 4 wire base compatibility, relay bases available
• Highly stable operation, RF/Transient protection
• Low standby current, 45μA at 24VDC
• Two built-in power/sensitivity supervision/alarm LEDs
• Non-directional smoke chamber
• Vandal resistant security locking feature
• Built-in magnetic go/no go detector test feature
• Removable smoke labyrinth for cleaning or replacement
• Automatic Sensitivity window verification function meets outlined requirements in NFPA 72, Chapter 2 & 7, Inspection, Testing and Maintenance
• Compatible with SIJ-24 ionization detectors
• Backwards compatible with Hochiki SLK and SIH detectors


SLR-24H PHOTOELECTRIC/ HEAT SMOKE DETECTOR

SLR-24H PHOTOELECTRIC/ HEAT SMOKE DETECTOR

APPLICATION

The SLR-24H can be used in all areas where Photoelectric Smoke Detectors are required. The wide range smoke chamber makes the SLR-24H well suited for fires ranging from smoldering to flaming fires. NS-4 Series, NS-6 Series, HSC-4R or HSC-xxx R Style bases may be used with the SLR-24H. Current interchangeable/compatible devices are the SIJ-24 ionization detector, SLR-24V photoelectric detector and the DCD-135/190 heat detectors.

All NS conventional devices are mechanically compatible with Hochiki America HSB, HSC and YBA type bases which may have been used in previous installations. Please check individual panel listings for compatible bases.

OPERATION

The SLR-24H photoelectric smoke detector utilizes two bicolored LED’s for indication of status. In a normal standby condition the LED’s flash Green every 3 seconds. When the detector senses that its sensitivity has drifted outside the UL listed sensitivity window the LED’s will flash Red every 3 seconds. When the detector senses smoke and goes into alarm the status LED’s will latch on Red.

The detector utilizes an infrared LED light source and silicon photo diode receiving element in the smoke chamber. In a normal standby condition, the receiving element receives no light from the pulsing LED light source. In the event of a fire, smoke enters the detector smoke chamber and light is reflected from the smoke particles to the receiving element. The light received is converted into an electronic signal.

Signals are processed and compared to a reference level, and when two consecutive signals exceeding the reference level are received within a specified period of time, the time delay circuit triggers the SCR switch to
activate the alarm signal. The status LED’s light continuously during the alarm period.

ENGINEERING SPECIFICATIONS

The contractor shall furnish and install where indicated on the plans, Hochiki America Model SLR-24H photoelectric smoke detectors. The combination detector head and twist-lock base shall be UL listed compatible with a UL listed fire alarm panel.

The base shall permit direct interchange with Hochiki America SLR-24V photoelectric detector, SIJ-24 ionization type smoke detector and/or DCD-135 /190 fixed temperature/rate-of-rise heat detectors. The base shall be appropriate twistlockbase NS-4 Series, NS-6 Series, HSC-4R, or HSC-xxx R. In the event of partial or complete retrofit, the SLR-24 maybe used in conjunction with, or as a replacement for, Hochiki America detectors (SLK-24, SLK-24FH and the SIH-24) on most HSB and HSC base applications.

The smoke detector shall have two flashing status LED’s for visual supervision. When the detector is in standby condition the LED’s will flash Green. When the detector is outside the UL listed sensitivity window the LED’s will flash Red. When the detector is actuated, the flashing LED’s will latch on Red. The detector may be reset by actuating the control panel reset switch.

The sensitivity of the detector shall be capable of being measured. It shall be possible to perform a functional test of the detector without the need of generating smoke. The sensitivity of the detector shall be monitored automatically and continuously to verify that it is operating within the listed sensitivity range. To facilitate installation, the detector shall be non-polarized. Voltage and RF transient suppression techniques shall be employed to minimize false alarm potential. Auxiliary SPDT relays shall be installed where indicated. The vandal-resistant, security locking feature shall be used in those areas as indicated on the drawing. The locking feature shall be field removable when not required.

STANDARD FEATURES

• Low profile, 2.2″ high (with base)
• 2 or 4 wire base compatibility, relay bases available
• 135°F latching heat sensor
• Heat sensor protected by a built-in guard
• Highly stable operation, RF/Transient protection
• Low standby current, 45μA at 24VDC
• Two built-in power/sensitivity supervision/alarm LED’s
• Non-directional smoke chamber
• Vandal resistant security locking feature
• Removable smoke labyrinth for cleaning or replacement
• Automatic Sensitivity window verification function meets outlined requirements in NFPA 72, Chapter 2 & 7, Inspection, Testing and Maintenance


SIJ-24 IONIZATION SMOKE DETECTOR

SIJ-24 IONIZATION SMOKE DETECTOR

APPLICATION

The SIJ-24 can be used in all areas where Ionization Smoke Detectors are required. The responsive yet highly stabile operation allows the SIJ-24 to fit in a wide range of uses. The SIJ-24 can be used in areas where early warning of superheated or flaming combustibles is
expected.

NS-4 Series, NS-6 Series, HSC-4R or HSC-(X)R Style bases may be used with the SIJ-24. Current compatible devices are the SLR-24V Photoelectric detector, the SLR-24H photoelectric detector with heat sensor and the DCD- 135/190 heat detectors.

All NS conventional devices are mechanically compatible with Hochiki America HSB, HSC and YBA type bases which may have been used in previous installations. Please check individual panel listings for compatible bases.

OPERATION

The SIJ-24 ionization smoke detector utilizes two bicolored LEDs for status indication purposes. In a normal standby condition the LEDs flash green approximately once each second. When the detector senses smoke and goes into alarm the status LEDs will latch on red.

A single radioactive source of Americium-241 ionizes two chambers within the detector, a reference chamber, and the smoke sensing chamber. The air is ionized by this source and a small DC current flows between the electrodes of each chamber. Smoke can freely enter the sensing chamber while the inner chamber is virtually sealed to smoke. Smoke entering the sensing chamber causes a reduction in the DC current flow, the voltage imbalance between the two chambers is proportional to the smoke density. When the voltage differences become great enough it causes the detector to go into alarm.

The two chamber design is utilized to compensate for changes in atmospheric and environmental conditions.

ENGINEERING SPECIFICATIONS

The contractor shall furnish and install where indicated on the plans, Hochiki America Model SIJ-24 ionization smoke detectors. The combination detector head and twist-lock base shall be UL listed compatible with a UL listed fire alarm panel.

The base shall permit direct interchange with Hochiki America, SLR-24V photoelectric type smoke detector, SLR-24H combination photoelectric/heat detector, and/or DCD-135/190 fixed temperature/rate-of-rise heat detectors. The base shall be appropriate twistlock base NS-4 Series, NS-6 Series, HSC-4R or HSC-(X)R. In the event of partial or complete retrofit, the SIJ-24 maybe used in conjunction with, or as a replacement for, Hochiki America detectors (SLK-24, SLK- 24FH and the SIH-24F) on most HSB and HSC base applications.

The smoke detector shall have two flashing status LEDs for visual supervision. When the detector is in standby condition the LEDs will flash Green. When the detector is actuated, the flashing LEDs will latch on Red. The detector may be reset by actuating the control panel reset switch. The sensitivity of the detector shall be capable of being measured. It shall be possible to perform a functional test of the detector without the need of generating smoke. The test method shall simulate effects of products of combustion in the chamber to ensure testing of the detector electronics.

To facilitate installation, the detector shall be non-polarized. Voltage and RF transient suppression techniques shall be employed to minimize false alarm potential. Auxiliary SPDT relays shall be installed where indicated. The vandal-resistant, security locking feature shall be used in those areas as indicated on the drawing. The locking feature shall be field removable when not required.

STANDARD FEATURES

• Low profile, 1.8″ high (with base)
• 2 or 4 wire base compatibility, relay bases available
• Highly stable operation, RF/Transient protection
• Low standby current, 40μA at 24 VDC
• Two built-in power/alarm LED’s for 360° viewing
• Non-directional smoke chamber
• Vandal resistant security locking feature
• Built-in magnetic detector sensitivity test feature Meets NFPA 72, Chapter 2 & 7, Inspection, Testing and Maintenance requirements
• Compatible with SLR-24V, SLV-24/-24V photoelectric detectors
• Backwards compatible with Hochiki SLK and SIH smoke detectors


DCD 135/190 FIXED TEMPERATURE/RATE OF RISE HEAT DETECTOR

DCD 135/190 FIXED TEMPERATURE/RATE OF RISE HEAT DETECTOR

APPLICATION

The DCD-135/-190 fixed temperature/rate-of-rise heat detector are suited for installation where high heat output fires are expected or in areas where ambient conditions would not allow use of other detection methods. Heat detectors are intended for protection of property. Do not rely on heat detectors for life safety protection.

Where life safety is a concern, smoke detectors must also be used. A UL listed fire alarm panel must electronically supervise the DCD-135/-190 heat detectors. All NS conventional devices are mechanically compatible with Hochiki America HSB, HSC and YBA type bases. Please check individual panel listings for compatible bases.

OPERATION

The DCD-135/-190 fixed temperature/rate-of-rise heat detectors are suited to detect in the presence of slow or fast rising temperatures due to burning combustibles. The construction of these models incorporate a thermistor heat element protected from damage by the built-in, durable plastic guard. These electronic heat detectors incorporate two power/alarm LED’s for 360° indication of status. In standby condition the power LED’s flash Green. In an alarm condition the LED’s latch on Red. The DCD-135/-190 electronic heat detection circuitry performs the same function as a Mechanical Device but with Electronic Precision. If the heat rise is less than 12°/minute the DCD will not alarm until it reaches its alarm temperature (135° or 190° ± 7.5°F). If the heat rise is greater than 12°/minute the DCD will alarm immediately giving an early warning signal and latching the Red alarm LED’s on.

ENGINEERING SPECIFICATIONS

Automatic heat detectors where ambient temperatures do not exceed 120°F shall be the DCD-135 fixed temperature/rate-of-rise heat detector rated at 135°F. For areas where ambient temperatures exceed 120°F, but not 160°F, the DCD-190 fixed temperature/rate-of-rise heat detector rated at 190°F shall be used. Electrical contacts shall be normally open, rated at 150mA @ 24VDC.

Heat detectors shall be installed in accordance with National Fire Protection Association Standard 72, the spacing assigned by Underwriters Laboratories and in accordance with the rules and regulations set forth by the local authorities having jurisdiction. Automatic heat detectors shall be Underwriters Laboratories listed.

STANDARD FEATURES

• Choice of fixed temperature/rate-of-rise 135°F or 190°F heat detector
• UL Listed spacing up to 60′ by 60′
• 2 or 4 wire base compatibility, relay bases available
• Highly stable operation, RF/Transient protection
• Low standby current, 35μA nominal
• Two built-in power/alarm LED’s for 360° viewing
• Fully electronic operation
• Power/alarm LED’s confirm detector status
• Compatible with Hochiki SLR-24V and SIJ-24 detectors and their bases


DFE 135/190 FIXED TEMPERATURE HEAT DETECTOR

DFE 135/190 FIXED TEMPERATURE HEAT DETECTOR

APPLICATION

The DFE 135/190 fixed temperature heat detector is suited for installation where high heat output fires are expected or in areas where ambient conditions would not allow use of other detection methods. Heat detectors are used for property protection. Do not rely on heat detectors for life safety protection. Where life safety is involved, smoke detectors must also be used.

Heat detectors should be electronically supervised from a UL listed alarm panel.

OPERATION

The DFE 135/190 fixed temperature heat detector is suited to alarm in the presence of slowly rising temperatures. The construction of this model
incorporates an oversized heat collector protected from damage by the built-in, durable plastic guard. The DFE 135/190 fixed temperature heat detector used the proven snap-disc principle of operation. This bi-metal disc deflects when temperature reaches a predetermined value. The disc deflection then causes a push-rod to close the internal contact resulting in an alarm condition.

The bi-metal disc returns to its normal shape when the heat subsides causing internal contacts to return to their normally open position. A standby condition is restored.

ENGINEERING SPECIFICATIONS

Automatic heat detectors shall be fixed temperature rated at 135°F for areas where ambient temperatures do not exceed 120°F and 190°F where ambient temperatures exceed 120°F but not 160°F. The fixed temperature element shall consist of a bi-metallic disc and actuator shaft. Electrical contacts shall be normally open, rated at 100mA @ 60VDC.

Heat detectors shall be installed in accordance with National Fire Protection Association Standard 72, the spacing assigned by Underwriters Laboratories, and in accordance with the rules and regulations set forth by the local authorities having jurisdiction. Automatic heat detectors shall be Underwriters Laboratories listed.

STANDARD FEATURES

• Choice of fixed temperature – 135°F or 190°F
• UL Listed ceiling spacing of 50′ by 50′ (2,500 square feet)
• Self-Restoring
• Heat element protected by a built-in guard
• Contact Rating of 100 mA
• Highly Dependable
• Latching LED base available


DSC-EA RATE OF RISE THERMAL DETECTOR

DSC-EA RATE OF RISE THERMAL DETECTOR

APPLICATION

The DSC rate of rise heat detector is suitable for use in most applications that require heat detection. Please note that special attention should be given to avoid installation in direct line with hot air heaters, above stoves, ovens or other heat generating objects.

OPERATION

The DSC rate of rise heat detectors are composed of an air chamber, vent and a flexible metal diaphragm. When the DSC is heated, the air in the chamber expands. The vent permits the chamber to breathe and slowly release the expanded air. If a fire occurs, the air in the chamber will expand more rapidly than it can be vented. This causes the diagram to close a set of precious metal contacts (nornally open) to trigger the alarm signal.

STANDARD FEATURES

• The DSC features a slim design which combines visual appeal with a high standard of reliability.
• The design of the DSC enables the detector to operate in locations where the temperature is likely to increase suddenly should a fire develop.
• The operating characteristics of DSC is a key feature of the product enabling a very cost effective solution for the use of heat detectors. This detector consumes no current in standby, which enables an unlimited number of detectors to be connected on the  same detection wires.
• With connection to the standard Hochiki range of conventional bases, the DSC heat detector can be connected or disconnected very easily, allowing simple interchangeability with other members of the Hochiki conventional detectors.