The air duct smoke detector shall be Silent Knight Model SD505-DUCTR and remote test switch shall be SD505-DTS-K. The housing shall contain a Silent Knight model SD505-APS, Photoelectric Smoke Sensor.
The duct detector shall be of metal construction. Complete mechanical installation must be able to be performed without removal of the detector cover. Terminal connections shall be screw type using a minimum of #6 screw.
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