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5. For ease of maintenance and inspection, 3 lighted display is used to iden- tify that each amplification component and associated power source is op- erational and in order. 6. Amplifiers allow for switchinn between HI and Low sound outputs from 1 watt to 100 watts per speaker driver for service and testing purposes. This way, when being tested, the unit does not cause undue alerting of the public. 7. Controls and batteries are housed in lockable NEMA 11/3R rated enclosures, primed and painted to prevent rL:Sting. 8. Rechargeable batteries are housed in a separate enclosure, isolated frolt the siren components. This separate enclosure is vented to prevent fumes from entering into areas of electronic components (rechargeing fumes are corrosive in nature and could have some effEct on sensitive electronic components as well as being explosive if exaosed to opening and closing contactors). Radio Control: 1. From a central point, siren controls are capable of operation via radio by use of a central control encoder connected to a transmitter, which in turn relays activation coecs to the siren location. At the siren location a decoder is interfaced with the siren control. The decoder receives the transmitted code and decodes the message so that the signals and Public Address can be utilized. Note. A.C.A. provides an area inside the NEMA 12 enclosure for radio de- coder application, so that there is no need to install decoder or the pole along side )f the control box. 2. Environmental parameters of the system parts and components are capable of service within the following ranges: Operating Temperature -400 C to 600 C Storage Temperature -650 C to 1250 C Humidity 0 to 95% Siren Installation Feature: 1. For maximum sound dispersion, the siren should be mounted 45 to 50 feet above ground, per FEMA CPG1-17. 2. The siren mounts on top of a pole mour+ for a well balanced installation. It may also be r-of mounted. 3. Speaker banks are completely assembled and incorporate plug-in weatherproof connectors for cabling between the siren and the control unit to eliminate wiring mistakes and to reduce costly installation time. 4. All mounting hardware provided with the siren package including ground- ing rods and ground wire, as well as cable guard.