Product Overview

The PAD300-DUCTR is an analog addressable duct smoke detector engineered to meet all local codes and NFPA requirements for HVAC duct installations. It uses a two-tube air sampling method, where the supplied 7" exhaust tube and a selectable intake sampling tube draw air from within the duct for accurate detection. Sampling tubes are available in 2.5 ft., 5 ft., and 10 ft. lengths and can be trimmed to fit the duct size.

Designed for easy installation, the unit mounts using a template and two sheet-metal screws without requiring removal of the clear cover. The housing includes a durable plastic backbox, a transparent cover secured by four captive screws, and accommodates installation without removing the detector head. The PAD300-DUCTR operates with addressable IPA and AFC/ARC series panels and supports SLC Class A, Class X, and Class B wiring configurations. Built for demanding environments, it functions across air velocities ranging from 100 to 4,000 ft/min and includes an integrated cover tamper switch for added system security.

Key Features

Model Number: PAD300-DUCTR
Item Number: 3992796
Detects smoke within HVAC duct systems
Ships fully assembled with housing and detector head
Compatible with addressable IPA and AFC/ARC series fire panels
Supports SLC Class A, Class X, and Class B configurations
Installation possible without removing the detector head
Listed air velocity range: 100–4,000 ft/min
No screens or filters required inside the housing
Durable plastic enclosure with clear cover
Integrated cover tamper switch
Utilizes simple snap-in STN Series sampling tubes
Includes one Form C relay
UUKL Listed for smoke control applications
Compatible with supervised PAD100-DRTS Remote Test Switch, MS-RA, MS-KA/R, and MS-KA/P/R remote indicators

Specifications:

Operating Voltage: 24 VDC
Current Draw: 500 μA
Detector Head Model: PAD300-DD
Detector Head Type: Photoelectric
Alarm Set Point: Fixed at 2.5%/ft (8%/m)
Sensitivity Test Method: Self-diagnostic
Air Velocity: 100–4,000 ft/min
Ambient Temperature: 32°F to 120°F (0°C to 49°C)
Humidity: 10%–85% RH (non-condensing)
Housing Material: Plastic backbox with clear cover
Finish: Gray backbox, clear cover
Dimensions: 13.5” L x 4.5” W x 2.25” H
Maximum Weight: 2 lbs.
Sampling Tubes: 2.5 ft., 5 ft., 10 ft.
Relay Contact Rating: 8A @ 30 VDC, 10A @ 120 VAC, 10A @ 250 VAC

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Warranty Terms

SILENT KNIGHT SK-4XLM

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