Duct Smoke Detector Installation Requirements

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Hardwired Smoke Detector Wiring Diagram With Nm B 14 3 Cable Smoke Alarms Hardwired Smoke Detectors

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Code Required Testing Of Fire Smoke And Combination Dampers Smoke Fire Life Fire

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Fire Alarm Symbols Wiring Diagrams And Symbols Electrical Industry Network Fire Alarm Alarm Fire Alarm System

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Duct Detectors Smoke Detection Nfpa 90a Code Requirements Detector Coding Commercial Hvac

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How To Install A Soffit Vent And Ductwork For A Bathroom Vent Fan Bathroom Vent Fan Bathroom Vent Bathroom Fan

Pin On Wiring

Pin On Wiring

Pin On Wiring

With all wiring in place install the detector head.

Duct smoke detector installation requirements.

Duct smoke detection nfpa 90a code requirements there are exceptions to the two basic requirements. If the duct system is designed to carry more than 2000 cfm 5 tons nominal of air you need one in the. A duct smoke detector should shut off a typical blower and fresh air and turn on the exhaust. Mount smoke alarms high on walls or ceilings remember smoke rises.

With power source de energized and the smoke detector not installed wire all connections per engineering drawings. The international mechanical code imc specifies that if the space is air conditioned and the a c unit is over 2 000 cfm a duct smoke detector is required to be installed in the return air duct. Standard location when factory mounted will be on the side opposite the damper actuator. Energize the duct detector.

Duct smoke detectors alarms and the code. Return air smoke detectors are not required when there is a protection of. At these locations air flow is less turbulent and the air smoke mixture should be more homogenous. Ventilation fan systems used to remove air from the inside of the building to the outside of the building.

Install the duct smoke detector on a flat section of hvac duct between six and ten duct widths from any bends or obstructions. Duct widths from 6 inches to 12 feet can be accommodated. Refer to nfpa 90a 72 and 101 for more information. The duct detector should when possible be located a minimum of six duct widths downstream from a source of turbulence bends inlets or deflection plates.

Wall mounted alarms should be installed not more than 12 inches away from the ceiling to the top of the alarm. Duct detectors aren t a replacement for room sensors. 2 6 p n 3101210 rev 02 iss 28jan13. Smoke alarms should be installed at least 10 feet 3 meters from a cooking appliance to minimize false alarms when cooking.

Detector installation 5 1 verify air flow direction and velocity model d4120 detectors are designed to be used in air handling systems with air velocities of 100 to 4000 feet per minute. For proper air sampling duct pressure should be a minimum of 0 01 inches of water.

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