Description

The Silent Knight SK-HEAT is a commercial thermal detector designed for compatible Honeywell Silent Knight fire alarm control panels. It uses a thermistor-based sensing circuit to provide reliable fixed-temperature detection and initiates an alarm when the surrounding temperature reaches 135°F (57°C).

The detector provides individual device identification, continuous panel supervision, rotary address selection, and visible status indication. Its plug-in construction simplifies installation, inspection, testing, and replacement. This product is intended exclusively for commercial fire alarm installations.

Product Functions

• Detects elevated ambient temperature
• Activates at a fixed 135°F threshold
• Reports alarm conditions to the control panel
• Provides individual device identification
• Supports continuous circuit supervision
• Displays detector status through dual LEDs
• Supports functional testing and maintenance

Electrical & System Information

The SK-HEAT operates on a compatible Silent Knight signaling line circuit with an operating voltage range of 15 to 32 VDC. Rotary decimal switches allow technicians to assign an individual device address directly at the detector.

The fire alarm control panel continuously monitors detector communication and operating status. A compatible mounting base is required and may be sold separately.

Features

• Commercial fixed-temperature detector
• 135°F (57°C) activation temperature
• Thermistor sensing circuit
• Rotary decimal address switches
• Dual status LEDs
• Wide-angle LED visibility
• Plug-in detector construction
• Low-profile white housing
• Panel-supervised operation
• Remote LED annunciator support

Mounting & Design

The Silent Knight SK-HEAT installs on a compatible plug-in detector base. Field wiring terminates at the base, allowing the detector head to be removed for testing, inspection, or replacement without disturbing the installed wiring.

The detector is designed for ceiling or wall installation where permitted by applicable codes, approved system documentation, and project requirements.

Protection & Applications

Suitable for:

• Mechanical Rooms
• Boiler Rooms
• Warehouses
• Storage Areas
• Commercial Kitchens
• Utility Rooms
• Manufacturing Facilities
• Parking Structures
• Industrial Properties

Compatibility

Compatible with selected:

• Honeywell Silent Knight Fire Alarm Control Panels
• Silent Knight Signaling Line Circuits
• B210LP Detector Base
• B501 Detector Base
• B224RB Relay Base
• B224BI Isolator Base
• B200S Sounder Base
• RA100Z Remote LED Annunciator

Always verify control-panel protocol, detector-base compatibility, firmware requirements, and approved system documentation before installation.

Technical Specifications

Manufacturer: Honeywell Silent Knight

Model: SK-HEAT

Product Type: Commercial Thermal Detector

Detection Method: Fixed Temperature

Activation Temperature: 135°F (57°C)

Sensing Element: Thermistor Circuit

Operating Voltage: 15–32 VDC

Typical Standby Current: 200 µA at 24 VDC

Maximum Alarm Current: 2 mA at 24 VDC with LED Activated

Addressing: Rotary Decimal Switches

Address Range: 01–159

Status Indicators: Dual LEDs

Maximum Listed Spacing: 50 ft (15.2 m), subject to installation conditions

Operating Temperature: –4°F to 100°F (–20°C to 38°C)

Operating Humidity: 10%–93% RH, Non-Condensing

Housing Color: White

Mounting: Compatible Detector Base Required

Application: Indoor Commercial Fire Alarm Systems

Listings: UL 521 and FM approval; verify product labeling and project requirements.

Applications

The Silent Knight SK-HEAT is designed for commercial fire alarm systems requiring fixed-temperature detection in locations where normal environmental conditions may make smoke detectors unsuitable. Typical applications include mechanical rooms, warehouses, commercial kitchens, utility areas, manufacturing spaces, boiler rooms, storage facilities, and other commercial or industrial environments.

SK-HEAT Datasheet