Description

The System Sensor HWL2-LF is a commercial wall-mount low frequency sounder designed for compatible fire alarm notification systems. As part of the L-Series 2nd Generation family, it produces a 520 Hz square-wave audible signal that complies with NFPA 72 requirements for sleeping areas while utilizing an improved low-current design.

The appliance features a white low-profile housing, field-selectable tone and volume settings, a universal mounting plate, and simplified plug-in installation. Designed for modern commercial life safety systems, it delivers dependable audible notification in hotels, apartments, healthcare facilities, and other occupancies requiring low-frequency signaling. This product is intended exclusively for commercial fire alarm installations.

Product Functions

• Provides 520 Hz low-frequency audible notification
• Wall-mounted installation
• Supports sleeping area notification requirements
• Selectable high and low volume settings
• Selectable coded and continuous operating modes
• Compatible with synchronized notification appliance circuits
• Continuous notification appliance circuit supervision
• Commercial life safety notification

Electrical & System Information

The HWL2-LF operates from a regulated 24 VDC notification appliance circuit with an operating voltage range of 16–33 VDC. It generates a 520 Hz ±10% square-wave tone specifically designed for low-frequency occupant notification in sleeping areas.

The appliance includes a universal mounting plate with an integrated shorting spring that permits wiring continuity testing before final installation. Rotary switches provide convenient field selection of volume and operating mode, helping reduce installation time and simplifying commissioning.

Features

• Commercial low-frequency sounder
• L-Series 2nd Generation design
• 520 Hz square-wave output
• White housing
• Wall-mount configuration
• High and low volume selection
• Continuous and coded operation
• Universal mounting plate
• Plug-in installation
• Built-in wiring continuity shorting spring
• Low current draw
• Modern low-profile design

Mounting & Design

The HWL2-LF mounts to compatible single-gang, double-gang, or 4-inch square electrical boxes using the included universal mounting plate. Its plug-in design allows installers to complete wiring, verify circuit continuity, and attach the appliance after system testing.

The compact enclosure provides a clean architectural appearance while allowing easy access for inspection, maintenance, and servicing.

Protection & Applications

Suitable for:

• Hotels
• Apartment Buildings
• Dormitories
• Assisted Living Facilities
• Healthcare Facilities
• Student Housing
• Residential Care Facilities
• Commercial Buildings
• Sleeping Areas

Compatibility

Compatible with:

• System Sensor L-Series 2nd Generation Notification Appliances
• Compatible Fire Alarm Control Panels
• Regulated 24 VDC Notification Appliance Circuits
• System Sensor Synchronization Protocol
• Compatible Surface Mount Back Boxes
• Standard Electrical Back Boxes

Always verify compatibility with the installed fire alarm control panel, notification appliance circuit, synchronization method, power supply, and project requirements before installation.

Technical Specifications

Manufacturer: System Sensor

Parent Company: Honeywell

Model: HWL2-LF

Series: L-Series 2nd Generation

Product Type: Low Frequency Sounder

Notification Type: Audible

Mounting: Wall

Housing Color: White

Audible Frequency: 520 Hz ±10% Square Wave

Operating Voltage: Regulated 24 VDC

Operating Voltage Range: 16–33 VDC

Volume Settings: High and Low

Input Wire Size: 12–18 AWG

Construction: Low-Profile Indoor Design

Application: Indoor Commercial Fire Alarm Notification Systems

Listings: UL 464 Listed and designed to meet NFPA 72 low-frequency sleeping area notification requirements when installed in accordance with applicable codes. Verify product labeling and project requirements before installation.

Applications

The System Sensor HWL2-LF is designed for commercial fire alarm systems requiring low-frequency audible notification in sleeping areas. Typical applications include hotels, apartment buildings, dormitories, assisted living facilities, healthcare facilities, student housing, and other commercial occupancies utilizing compatible notification appliance circuits and fire alarm control panels.

HWL2-LF Datasheet