Siemens EAD-3

Weatherproof Air Duct Detector Enclosure

  • Factory New
Brand: Siemens Part #: 121705 Category: Manufacturer Part #: EAD-3Secondary Part #: 500-686214


Designed for use with the Series IL, ID-60, and Series 3 Ionization or Photoelectric Detectors, Air Duct Detector Housings are designed for installation directly to Heating, Ventilating and Air Conditioning duct systems to comply with NFPA Standard No. 90A. When equipped with ionization or photo-electric detectors, these units will signal the presence of hazardous quantities of products of combustion or smoke being carried through the duct system. Air duct detectors are not intended to be substituted for open area detection. Air duct housings can be equipped with optional relays. These relays are utilized to operate any supplementary equipment when smoke or particles of combustion are detected. Note: On most control equipment, including System 3, only one detector per zone is permitted when the detector operated relay function is critical. The connection of a remote lamp or a remote relay per detector is allowed, but not both. The XL-3 control panel assures operation of all detector-operated relays, allowing up to 30 detectors per circuit having relays for critical functions may be used. For the MXL Control Panel, up to 60 detectors per circuit having relays may be used. The connection of a remote lamp or a remote relay is allowed for each detector but not both. The housing is uniquely designed with a clear housing cover for quick visualization of the detector alarm LED and detector type. UL and ULC Listed, and NYMEA, FM, CSFM and City of Chicago Approved. Sampling Tube for Duct only. Weather-proof enclosure.


Weight 20.00 lbs

Siemens Industry, Inc.





Unit of Measurement

EA (Each)

Production Status


Weatherproof Air Duct Detector Enclosure; MODEL EAD-3


Siemens - Installation Manual