74-2874: Intelligent Duct Smoke Detector Housing SIGA-DH. CSI 3-Part Specifications. Large file (>500kB).

FEATURES

• Suitable for High Air Velocity Duct Applications
• Standard XLS Intelligent Smoke Detectors
• Standard, Relay, or Isolator Detector Mounting Base
• Installs in Ducts up to 10 feet (3m) Wide
• Remote LED Accessory
• Designed and Manufactured per ISO 9001 Standards

GENERAL

The Excel Life Safety (XLS) SIGA-DH Duct Smoke Detector Housing uses all the capabilities of XLS intelligent photoelectric and multisensor smoke detectors. XLS intelligent smoke detectors gather analog information from their sensing element(s) and converts it into digital signals. The onboard microprocessor in the detector measures and analyzes these signals. It compares them to historical readings, time patterns, and known characteristics to make an alarm decision. Digital filters and complex algorithms are applied for optimum detector accuracy.

The large access door on the SIGA-DH is completely removable to facilitate fast detector installation and field wiring connections. Five 1-gang knockouts on the duct detector housing provide convenient locations for mounting XLS intelligent modules. 

DUCT SMOKE DETECTOR HOUSING
ACCESSORIES

Air Sampling Tubes
The Duct Detector Housing uses an air sampling inlet tube
and an exhaust tube. Air sampling tubes are available in
lengths from 8 in. (200 mm) to 10 feet (3m) and must be
ordered separately. The Duct Detector Housing includes a
6 in. (150 mm) exhaust tube.

Detector Mounting Bases
Each Duct Detector Housing requires a detector mounting
base (ordered separately) to accommodate the intelligent
smoke detector. Available mounting bases are as follows:

Standard Base SIGA-SB�
Basic mounting base; supports the SIGA-LED Alarm LED.

Relay Base SIGA-RB�
Mounting base with dry contact relay (normally open or
normally closed) controlled by the intelligent smoke detector.
The relay is rated for 1A @ 30 Vdc (pilot duty). The relay
position is supervised. The Relay Base does not support the
SIGA-LED Alarm LED.

The relay operates as follows:

• At system power-up or reset, the relay is de-energized
• On installation of an intelligent smoke detector in the
  Relay Base with the power on, the relay energizes for
  4 seconds, then de-energizes.
• On removal of an intelligent smoke detector from a Relay
  Base with the power on, the relay is de-energized.
• When the detector enters the alarm state, the relay is energized.

Isolator Base SIGA-IB�
Mounting base with built-in line fault isolator. A detector must
be installed to operate the fault isolator. The integral isolator relay is controlled by the detector or the loop controller. One loop can support a maximum of 96 Isolator Base. The Isolator Base does not support the SIGA-LED Alarm LED.

Alarm LED Indicator
The SIGA-LED Alarm LED Indicator can be installed remotely or directly on the SIGA-DH Duct Housing to provide indication for the associated intelligent duct detector. Only the SIGA-SB Standard detector base can use the SIGA-LED Alarm LED Indicator. The Alarm LED Indicator includes a red LED on a 1-gang plastic plate. A maximum of 1 SIGA-LED can operate per each detector.

Air Velocity Test Kit
The 6263-SG Air Velocity Test Kit interfaces to the SIGA-DH Duct Housing and is used to test or confirm the air velocity in HVAC ducts.

SPECIFICATIONS

Intelligent Duct Smoke Detector Housing

Model:

• SIGA-DH Intelligent Duct Smoke Detector Housing. Includes 6 in. (150 mm) exhaust tube, gaskets, and self-adhesive drilling template for mounting duct housing.

Air Velocity Range:
300 to 4000 ft/min. (1.5 to 20.3 m/sec) with XLS-PS and XLS-PHS Detectors
300 to 1000 ft/min. (1.5 to 5.0 m/sec) with XLS-IPHS Detector

Controller Compatibility:
SIGNATURE Loop Controller

Addressing Requirements:
One input device address

Dimensions:
7-3/8 in. (188 mm) wide x 7 in. (178 mm) high x 5 in. (127 mm) deep

Material and Finish:
16 gauge cold rolled steel
Red, baked enamel

Conduit Knockouts:
Combination 1/2 in. and 3/4 in.

Ship Weight:
6.5 lb (3 kg)

Standards:
International ISO 9001 Standards

Agency Approvals:
UL, CSFM

Options

Intelligent Duct Smoke Detectors:

• XLS-PS Intelligent Photoelectric Smoke Detector (with photoelectric sensing element), .5 lb (.23 kg)
• XLS-PHS Intelligent 3D Multisensor Smoke Detector (with photoelectric and heat sensing elements), .5 lb (.23 kg)
• XLS-IPHS Intelligent 4D Multisensor Smoke Detector (with ionization, photoelectric, and heat sensing elements), .5 lb (.23 kg)

Detector Mounting Bases:

• SIGA-SB Standard Base, .2 lb (.09 kg)
• SIGA-RB Relay Base, .2 lb (.09 kg)
• SIGA-IB Isolator Base, .2 lb (.09 kg)

Air Sampling Inlet Tubes:

• 6261-001, 8 in. (200 mm) Air Sampling Inlet Tube, .25 lb (.1 kg)
• 6261-002, 24 in. (600 mm) Air Sampling Inlet Tube, .5 lb (.2 kg)
• 6261-003, 42 in. (1060 mm) Air Sampling Inlet Tube, 1.6 lb (.8 kg)
• 6261-006, 78 in. (1980 mm) Air Sampling Inlet Tube, 2.2 lb (1 kg)
• 6261-010, 120 in. (3048 mm) Air Sampling Inlet Tube, 4.4 lb (2 kg)

Accessory

• SIGA-LED Alarm LED Indicator, .2 lb (.09 kg)
• 6263-SG Air Velocity Test Kit

TYPICAL APPLICATION

The SIGA-DH Duct Smoke Detector Housing must be installed on a clear, flat, accessible duct area that is at least 8 in. (200 mm) wide. To avoid stratification effects, install the detector housing a minimum of six duct widths beyond any bends in the duct. Duct smoke detectors are usually installed on the supply duct after the air filters or in the return air stream before outdoor air is added.

Air velocity in the duct maintains the air flow that enters the detector housing through perforations in the air sampling inlet tube and discharges through the exhaust (outlet) tube. The air sampling inlet tube length must span the entire width of the air duct. Air sampling tubes longer than 3 ft (914 mm) must be supported at both ends.

Before installing the duct detector housing, verify that duct air velocity is within the limits of the smoke detector. Also verify that duct relative humidity is within 0-93%, noncondensing.

Always install duct smoke detectors in accordance with the latest recognized editions of local and national fire alarm codes. Install the duct detector housing with the INLET air sampling tube upstream of the EXHAUST tube.

Duct smoke detector continually samples air flow in a HVAC duct and initiates an alarm condition when the quantity (percent obscuration) of combustion particles in the air sample exceeds the detector sensitivity setting.

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Sunrise, FL 33325

Home Building Control
Honeywell Limited - Honeywell Limitée
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Room 3213-3225
Sun Hung Kai Centre
No. 30 Harbour Road
Wanchai
Hong Kong

74-2874   L.A. 5-97

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