EDWARDS SUPERDUCT SIGA-SD (01) PDF MANUAL

EDWARDS SUPERDUCT SIGA-SD (01) PDF SUMMARY:

What is the primary purpose of the SuperDuct Signature Duct Smoke Detector?

Its primary purpose is to provide early warning of an impending fire and to prevent smoke from circulating throughout the building.

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What does the duct smoke detector comprise of?

The duct smoke detector comprises a plastic housing, a printed circuit board, a clear plastic cover, and an exhaust tube. The clear plastic cover permits visual inspections without disassembling the detector. The cover attaches to the detector housing using four captive screws and forms an airtight chamber around the sensing electronics.

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What is required to introduce air into the duct smoke detector?

A sampling tube is required to introduce air into the duct smoke detector. The sampling tube is ordered separately and varies in length depending on the width of the HVAC duct.

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What models does this document apply to?

This document applies to the following duct smoke detector models: SIGA-SD, and XLS-SD.

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Is the SuperDuct duct smoke detector a substitute for open area protection?

SuperDuct duct smoke detectors are not intended as substitutes for open area protection.

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Where can I find more information regarding duct smoke detector installation, testing, and maintenance?

For information regarding duct smoke detector installation, testing, and maintenance not included in this installation sheet, refer to Technical Bulletin P/N 3100738.

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What are the dimensions of the duct smoke detector?

The dimensions are 8.70 x 5.45 x 1.90 inches.

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What size wire should I use?

Use wire size 14 to 22 AWG.

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What is the smoke detection method?

The smoke detection method is Photoelectric (light scattering principle).

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What is the air velocity rating?

The air velocity rating is 100 to 4,000 ft/min.

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What is the air pressure differential?

The air pressure differential is 0.005 to 1.00 inches of water.

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What is the sensitivity of the detector?

The sensitivity is 0.79 to 2.46 %/ft obscuration.

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What is the alarm test response time?

The alarm test response time is 5 seconds.

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What LED indicators are present, and what do they indicate?

There are two LED indicators: Alarm (red) and Power (green).

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What are the ratings of the Common alarm relay?

Ratings: 2.0 A at 30 Vdc (resistive).

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What is the operating voltage?

The operating voltage is 15.2 to 19.95 Vdc.

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What is the operating current in Standby, Alarm, Inrush, and Standalone alarm?

Standby: 45 μA Alarm: 45 μA Inrush: 1 mA Standalone alarm: 18 mA

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What is the operating temperature range?

The operating temperature range is -29 to 70 C (-20 to 158 F).

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What is the operating humidity?

The operating humidity is 93% RH, noncondensing.

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Will the SuperDuct duct smoke detectors operate without electrical power?

SuperDuct duct smoke detectors will not operate without electrical power.

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Will the SuperDuct duct smoke detectors operate outside of the listed electrical and environmental specifications?

SuperDuct duct smoke detectors will not operate as designed outside of the listed electrical and environmental specifications.

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Will the SuperDuct duct smoke detectors sense smoke when the ventilation system is not operating?

SuperDuct duct smoke detectors will not sense smoke unless the ventilation system is operating and the sensor’s cover is properly installed.

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Where should I install the duct smoke detector on the HVAC duct?

Install the duct smoke detector on a flat section of HVAC duct between six and ten duct widths from any bends or obstructions.

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Where should I install supply-side detectors?

Install supply-side detectors at a point downstream from the supply fan and after the air filter.

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Where should I install return-side detectors?

Install return-side detectors at a point before the return air stream is diluted by outside air.

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How far across the duct should sampling tubes extend?

Sampling tubes must extend at least two-thirds across the width of the duct. Sampling tubes longer than 36 inches must be supported at both ends.

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What should I do before installing the detector?

Please read these instructions thoroughly before installing.

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What is the first step in installation?

Verify the duct air velocity.

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How do I verify the duct air velocity?

Drill a small hole at the point where the duct smoke detector is being installed. Using the SD-VTK Air Velocity Test Kit and a suitable air velocity meter, verify that the air velocity in the HVAC duct falls within the specified operating range of the detector and note which direction the air flows.

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What should I do if the air velocity does not fall within the specified range?

If the air velocity does not fall within the specified range, relocate the detector and seal the hole in the HVAC duct.

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What should I keep in mind when verifying airflow?

In order to verify airflow direction and velocity, air must be moving through the HVAC system.

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How should I prepare the HVAC duct for detector mounting?

Attach the drill template to the HVAC duct. Drill (or punch) the mounting holes where indicated. Remove any rough edges from the holes.

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How should I assemble the detector?

Assemble the duct smoke detector as shown in Figure 1. Rotate the air sampling tube so the inlet holes face the direction of airflow.

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Is it possible to install the sampling tube through the front of the duct smoke detector?

In some applications, it may be desirable to install the sampling tube through the front of the duct smoke detector. For details, refer to Technical Bulletin P/N 3100738.

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What should I do if the sampling tube is longer than the width of the duct?

If the sampling tube is longer than the width of the duct, drill a 3/4-inch hole on the opposite side of the duct. Extend the sampling tube through the hole as shown in Figure 3 and seal the opening around the tube with an approved sealant.

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What is the fifth step?

Verify the air pressure differential.

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How do I verify the air pressure differential?

Open the duct smoke detector and connect a suitable air pressure differential meter to the sampling tube and exhaust tube openings as shown in Figure 4. Verify that the air pressure differential measured between the two openings falls within the specified operating range of the detector. Use a suitable air pressure differential meter (supplied by the installer) and an SD-VTK Air Velocity Test kit.

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What should I do after installation?

After completing the installation, test the duct smoke detector to ensure that it is operating correctly before leaving the site. For details, refer to Technical Bulletin P/N 3100738.

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What is the wiring configuration for the duct smoke detector?

Wire the duct smoke detector as shown in Figure 5.

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What auxiliary equipment can be connected to the detector?

SD-TRK or SD-TRM, SIGA-LED.

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What are the restrictions on connecting auxiliary equipment?

No more than one remote test station or LED indicator can be connected to the detector at the same time. Wiring is unsupervised. Maximum wire resistance is 10 ohms per wire.

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Table of Sampling Tubes

Model	Description
SD-T8	8-inch sampling tube
SD-T18	18-inch sampling tube
SD-T24	24-inch sampling tube
SD-T36	36-inch sampling tube
SD-T42	42-inch sampling tube
SD-T60	60-inch sampling tube
SD-T78	78-inch sampling tube
SD-T120	120-inch sampling tube