Hochiki Conventional Detectors Technical Bulletin

Introduction

These instructions apply to all detectors listed in this Technical Bulletin for maintaining, cleaning, and testing. Failure to follow these instructions may result in the failure of the detectors to initiate an alarm condition. Hochiki America Corporation is not responsible for detectors that have been improperly maintained, cleaned, or tested.

Detectors

• SOC-24V/SOC-24VN: Photoelectric detector suitable for monitoring smoke in open areas or HVAC ducts.
• SOE-24V: Multi-criteria (photoelectric sensors) detector suitable for monitoring smoke in open areas or HVAC ducts.
• SOE-24H: Multi-criteria (photoelectric/ thermistor sensors) detector suitable for monitoring smoke in open areas or HVAC ducts and fixed temperature in open areas.
• DCD-135: Combination heat detector suitable for monitoring fixed/rate of rise temperature in open areas.
• DCD-190: Combination heat detector suitable for monitoring fixed/rate of rise temperature in open areas.
• DFE-135: Fixed heat detector suitable for monitoring fixed temperature in open areas.
• DFE-190: Fixed heat detector suitable for monitoring fixed temperature in open areas.
• DSC-EA: Rate of rise heat detector suitable for monitoring rate of rise temperature in open areas.
• *W or (WHT) suffix for white models not shown.

Features of SOC and SOE series detectors

• High signal-to-noise ratio and sensitivity stability effective in a wide range of environmental conditions.
• Wide viewing angle alarm indicators.
• Automatic drift compensation and maintenance indication.
• Built-in magnetic test feature.
• Break-away, hidden locking feature for use with NS bases.
• Optimized reduction to false alarms and enhanced reaction time to real fires.

Multi-criteria Detectors use a supplementary photoelectric sensor to scale the photoelectric smoke sensor output to reduce sensitivity to false alarms and increase sensitivity to fire conditions.

Placement of Detectors

Following the guidelines in NFPA 72, base the number and location of detectors on an engineering survey of the area to be protected. Factors to consider include:

• Contents to be protected
• Type of construction and use of structure
• Human occupancy
• Burning characteristics of contents
• Space involved
• Height of ceiling
• Surface condition of ceiling
• Total area
• Air movement (stratification)
• Vent location (velocities and dilution)
• Deflections and obstructions

Detector Location Spacing Guidelines:

• One smoke detector covers 450 to 900 square feet.
• One heat detector covers up to 2500 square feet.
• Consider local conditions and codes along with engineering evaluations to determine the proper spacing and specification.

WARNING: Heat detectors are not life safety devices. Smoke detectors are recommended where life safety is a factor.

Examples:

• You may use 30' spacing on smooth ceilings for all smoke detectors.
• You may use 50' spacing on smooth ceilings for DFE-135, DFE-190, DSC-EA heat detectors.
• You may use 70' spacing on smooth ceilings for DCD-135, DCD-190 heat detectors.

*Beams or other obstructions extending more than 18" below the ceiling reduce the effective range of the detectors. Such obstruction should designate a new separation point and be considered a border for a new section.

*Beams or other obstructions extending more than 8" but less than 18" require reduced spacing at the perpendicular of the obstructions.

NOTE: For information on differing styles of construction consult the NFPA 72.

WARNING: Do not install Hochiki smoke detectors in the following areas:

• Where temperatures are likely to exceed the operating temperature ranges specified by detector.
• Where forced ventilation can dilute the smoke from a fire.
• Closer than 4" to any side wall.
• In known areas of combustion such as kitchens or furnace rooms.
• In known areas of sustained corrosive atmospheres such as industrial chemical processing areas.

Maintenance

Cleaning

Use clean, dry compressed air to remove dust from a detector, or return to Hochiki America for service. Disassembly of the detector may result in the failure of the detector to initiate an alarm condition or initiation of a false alarm condition.

Testing

For a smoke detector to operate efficiently, the combustion products must enter the outer chamber. Air flow, stratification, velocity, stagnation, and migration all affect the efficiency and accuracy of the detector. Use an air flow meter to determine the movement of the air within a structure. Field testing equipment is available from Hochiki America for testing the function of the detectors. Consult local codes and ordinances for maintenance requirements. Hochiki America Corporation recommends a bi-annual functional testing and visual inspection.

Prior to testing any detector, care should be exercised to ensure proper disabling of live signals and notification circuits of the Fire Alarm Control Panel. Failure to exercise this procedure may result in false alarm signals which could place life and property in jeopardy.

Caution: Excessive aerosol smoke can contaminate a detector.

• Do not spray in bursts longer than 1 second.
• Wait 20 seconds between sprays.
• Spray 10 inches from detector.

Test with Smoke Sabre aerosol cans or the Testifier 1000/1001 or 2000/2001 with TS3 smoke capsules.

Testifier usage: To insert the battery baton, hold the Testifire head unit by the handle and depress the upper spring button on the battery baton. Align the button with the location hole in the handle and push the battery baton into the handle until the button snaps into place.

1. Insert the other end of the battery baton into the Solo access pole and depress the lower spring button. Align it with the location hole and push the battery baton further into the pole until the button snaps into place.
2. Remove the capsule from its outer carton and Anti-Static bag.
3. Remove the spring clip protector cap from the new capsule.
4. Holding the capsule by spring clips with the label on the underside, carefully insert the new capsule into the capsule port. Push it into position, ensuring that the clips spring out positively on both sides of the capsule.
5. Close the access cover securely.
6. Program the tester to the following options available: Smoke or Heat.
7. Raise Testifire over the detector. The detector should touch the base of the inner clear cup.
8. Lower Testifire from the sensor after testing is complete.

Testifire's LED Indications

Detector Specifications

SOC-24V Conventional Photoelectric Smoke Detector

SOE-24V Conventional Photoelectric Smoke Detector

SOE-24H Conventional Photoelectric Smoke and Heat Detector

DCD-135 Conventional Fixed Temperature and Rate of Rise Heat Detector

DCD-190 Conventional Fixed Temperature and Rate of Rise Heat Detector

DFE-135 Conventional Fixed Temperature Dry Contact Heat Detector

DFE-190 Conventional Fixed Temperature Dry Contact Heat Detector

DSC-EA Conventional Rate of Rise Dry Contact Heat Detector