Hochiki SLR-24V Smoke Detector

The Hochiki SLR-24V Photoelectric Smoke Detector provides reliable smoke detection for compatible conventional fire alarm systems. Its photoelectric sensing technology responds to a wide range of fire conditions. In addition, its low-profile design makes it suitable for many commercial and institutional fire alarm applications.

Reliable Photoelectric Smoke Detection

The Hochiki SLR-24V uses an infrared LED light source and a silicon photodiode inside the smoke chamber. During normal operation, the receiving element detects no light from the pulsing LED. However, smoke entering the chamber reflects light toward the receiving element.

The detector then converts the received light into an electronic signal. As a result, the device can identify smoke conditions and activate an alarm through the connected fire alarm system.

Its patented smoke chamber supports detection across a range of fire types. Therefore, the detector works well for conditions ranging from smoldering fires to fast-flame fires.

Designed for Conventional Fire Alarm Systems

This photoelectric smoke detector operates at a nominal 24 VDC. Its working voltage range is 15.0 to 33.0 VDC. Moreover, the detector supports compatible 2-wire and 4-wire base configurations.

The unit features two built-in bicolor LEDs for visual status indication. During normal standby operation, the LEDs flash green every three seconds. When the detector senses smoke and enters alarm mode, the LEDs latch red.

Key Features

• Photoelectric smoke detection technology
• Nominal 24 VDC operation
• 15.0 to 33.0 VDC working voltage range
• Low-profile design
• 2-wire and 4-wire base compatibility
• Two built-in bicolor status LEDs
• Non-directional smoke chamber
• RF and transient protection
• Removable smoke labyrinth
• Automatic sensitivity window verification
• Low supervisory current
• Compatible relay base options
• Designed for conventional fire alarm applications

Operating Specifications

The Hochiki SLR-24V has a supervisory current of 45µA at 24 VDC. In addition, its maximum alarm current reaches 150mA at 24 VDC. The detector supports an air velocity range from 0 to 4,000 feet per minute.

The operating temperature range is 32°F to 100°F. Furthermore, the unit supports up to 95% relative humidity in non-condensing conditions. Its case uses a durable PC/ABS blend with a bone-colored finish.

Base Compatibility and Applications

Compatible base options include NS-4 Series, NS-6 Series, HSC-4R, and selected HSC relay-style bases. However, installers should always verify the specific fire alarm panel listing and base compatibility before installation.

The detector can support commercial buildings, offices, warehouses, institutional facilities, and other compatible conventional fire alarm applications. In addition, its removable smoke labyrinth can simplify cleaning and maintenance.

Installation and Compatibility

Always verify compatibility before replacing or installing this smoke detector. Check the existing detector model, base, system voltage, and fire alarm control panel requirements. Also, follow manufacturer instructions and applicable fire alarm codes.

Qualified fire alarm professionals should install and test the detector. Finally, technicians should perform the required system testing after installation to confirm correct operation.

Overall, this Hochiki photoelectric detector provides a practical replacement option for compatible legacy fire alarm systems. Its photoelectric technology, status LEDs, flexible base compatibility, and sensitivity verification features support dependable conventional smoke detection applications.