Description. The GEM-SMK is a high-quality photoelec-tric smoke detector with built-in supervised digitally-codedradio transmitter. It is compatible with Napcoís GEM-RECV Series supervised security receivers that monitoralarms, restores, low battery and status.The GEM-SMK sounds a local alarm as soon as smoke isdetected and the transmitter will send an alarm signal tothe supervised receiver. The alarm signal will be repeatedevery 10 seconds thereafter as long as smoke is still pre-sent. A restore report will be sent when the smoke detec-tion chamber clears. Supervisory status reports are sentfrom the GEM-SMK every hour.Coding switches are not required or used in the GEM-SMK. Each transmitter is assigned a unique identificationcode number at the factory.REMOVE MOUNTINGPLATEStep 1. Remove the mounting plate. Remove theGEM-SMK mounting plate by turning the platecounter-clockwise and pulling it up.TWISTMOUNTINGPLATE TOUNLOCKStep 3. Install batteries. Connect the two 9-volt alkaline batteries and place them intothe battery holding clips.CONNECT ANDINSTALL TWO 9-VOLT ALKALINEBATTERIESStep 2. Identify components. Examine the GEM-SMK to identify the component locations.TRANSMITTERBOARDBATTERYHOLDINGCLIPSR333 Bayview AvenueAmityville, New York 11701For Sales and Repairs, (800) 645-9445For Technical Service, (800) 645-9440Publicly traded on NASDAQ Symbol: NSSC© NAPCO 2005GEM-SMKSUPERVISEDDIGITAL SMOKE DETECTORINSTALLATION INSTRUCTIONSWI750B 2/05The smoke detector and transmitter are powered by two9-volt alkaline batteries (supplied) which can power theunit for up to two years. If the battery voltage drops be-low normal, a low-battery report will be sent to the re-ceiver with any status or alarm transmission. If a low-battery condition is indicated, replace both batteries.NOTE: Temperature and humidity extremes may reducethe life of the battery.continued