Edwards Signaling SuperDuct ESD-2W

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Technical Bulletin

SuperDuct Conventional Two-Wire Duct Smoke Detector 1

SuperDuct Conventional Two-Wire Duct

Smoke Detector

P/N 3100737 • Rev 1.0 • 06SEP05

Content

Introduction ............................................................................1

Related documents ..................................................................1

Duct smoke detector limitations ...............................................1

Product description ...............................................................1

Overview ..................................................................................1

Description ...............................................................................2

Features ...................................................................................2

Specifications ...........................................................................3

Accessories..............................................................................3

Operation ................................................................................4

Controls and indicators.............................................................4

Normal state.............................................................................4

Alarm state ...............................................................................4

Trouble state ............................................................................4

Installation ..............................................................................4

Installation guidelines...............................................................4

Installation sequence................................................................5

Installing the sampling tube from the front of the detector........5

Supporting sampling tubes greater than 36 inches long ..........5

Wiring.......................................................................................6

Maintenance and service.......................................................6

Recommended service schedule .............................................6

Testing the duct smoke detector ..............................................6

Troubleshooting .......................................................................6

Cleaning the duct smoke detector............................................6

Introduction

This document provides technical information for the

SuperDuct Conventional Two-Wire Duct Smoke Detector

(referred to simply as duct smoke detector for the remainder of

this document.)

This document applies to the following duct smoke detector

models: ESD-2W and SD-2W.

Related documents

In addition to this document, important information regarding

the proper installation and maintenance of duct smoke

detectors is provided in the following standards:

• NFPA 70 National Electrical Code

• NFPA 72 National Fire Alarm Code

• NFPA 90A Installation of Air Conditioning and

Ventilating Systems

• UL 268A Smoke Detectors for Duct Applications

• ULC 529 Smoke Detectors for Fire Alarm Systems

• NEMA Guide for Proper Use of Smoke Detectors in Duct

Applications

Duct smoke detector limitations

SuperDuct duct smoke detectors will not operate without

electrical power.

SuperDuct duct smoke detectors will not operate as designed

outside of the listed electrical and environmental

specifications.

SuperDuct duct smoke detectors will not sense smoke unless

the ventilation system is operating and the sensor’s cover is

properly installed.

SuperDuct duct smoke detectors may not operate as designed

unless installed in accordance with these instructions and all

applicable national and local codes as determined by the local

authority having jurisdiction.

Product description

Overview

The duct smoke detector is used to detect smoke in the

protected premises’ HVAC system under extended

temperature ranges. It can be installed in self-contained

commercial rooftop HVAC systems where the HVAC

components (compressor, condensing unit, heating coils, etc.)

are enclosed in a single package to protect them from adverse

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Summary

Introduction

Duct Smoke Detector Limitations

Product Description

Overview

Explains the primary function and application of the duct smoke detector in HVAC systems for early fire warning.

Description

Details the physical components of the duct smoke detector, including housing, PCB, cover, and sampling tubes.

Features

Lists key operational and design advantages like environmental compensation, magnetic testing, and status LEDs.

Specifications

Provides technical details such as dimensions, wire size, sensitivity, operating ranges, and electrical ratings.

Accessories

Lists compatible accessories like sampling tubes and remote test stations for the duct smoke detector.

Operation

Controls and Indicators

Describes the function of the magnetic test switch, Alarm, Trouble, and Dirty LEDs on the detector.

Normal State

Explains the detector's standard operating mode when no smoke or trouble conditions are present.

Alarm State

Details how the detector enters alarm, including LED activation and relay output, upon smoke detection.

Trouble State

Outlines conditions that cause the detector to enter a trouble state, such as cover removal or internal faults.

Installation

Installation Guidelines

Provides essential rules for locating the detector and positioning the sampling tube within the HVAC duct.

Installation Sequence

Lists the general steps required for physically installing the duct smoke detector onto an HVAC duct.

Installing the Sampling Tube from the Front of the Detector

Describes an alternative method for installing the sampling tube through the detector's front cover.

Supporting Sampling Tubes Longer Than 36 Inches Long

Explains the NFPA requirement and method for supporting extended sampling tubes to prevent vibration.

Wiring

Maintenance and Service

Recommended Service Schedule

Outlines the frequency for visual inspections and alarm tests for the duct smoke detector.

Testing the Duct Smoke Detector

Details the procedure for performing an alarm test on the duct smoke detector using test switches or magnets.

Troubleshooting

Guides users on identifying and resolving common issues, including trouble states and dirty detector conditions.

Cleaning the Duct Smoke Detector

Provides step-by-step instructions for cleaning the detector's internal components, focusing on the sensor.

Mechanical Dimensions