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local emergen~~ signaling if tt~e need arises. <br /> <br />D. ~ne siren shall operate with a current draw of less than 10 amperes. <br /> The battery back-up system shall have a capacity to provide continuous <br /> full power for a m~inim~ of fifteen (15) minutes. Battery capacity <br /> shall be maintained by a high quality, well-filtered and regulated <br /> charger (UL labeled, CSA Certified). The charger shall be capable to <br /> recharge a set of fully dls~hargea batteries %-ithin 12 hours. Charger <br /> shall be supplied with proper controls to turn off the VAC primary <br /> power and include indicators for monitoring battery voltage. The <br /> ~erm~nsl~ for connecting land-line <br /> control unit must have convenient ~ ' <br /> and radio activation lines. The siren ~ with the <br /> Heals~Ruff radio activation system. <br /> <br /> E. Amplifiers shall be of modular design, 100% solid state. Amplifier <br /> performance must have less than 4% distortion. Each amplifier must <br /> have convenient test points or LED indicators for monitoring outputs to <br /> speaker driver for test purposes, or measuring impedance of speaker <br /> circuitry. Each assembly shall be supplied.'with 50 feet of weather- <br /> proof interconnect cable suitable for outdoor installation with or <br /> without conduit. <br /> <br /> F. Bidders shall include the following details for the system <br /> installation: (A) type of cable; (5) number of conductors ~nd wire <br /> size; (C) method of coF~nection; (D) size of recommended conduit; (E) <br /> weight of s~eakers; (F) weight of control; (G) si~e of s~eakers; (H) <br /> size of controls. Control units shall consist of enclosures suitable <br /> for outdoor installation. Enclosures housing electronic equipment <br /> shall comply with NE~ type enclosures. All enclosures shall have <br /> provision for locking. Cabinets for housing corrosive materials (i.e. <br /> shortage batteries) shall not have a common wall to any area housing <br /> electroPic equipment for operation of sirens. <br /> ~-~ ~ steal, shall be proparly <br /> G. ~1 exposed metal surfaces, unless <br /> finished to inhibit detelioration and corrosion due to weather and s~un. <br /> <br /> H. All interr~l wiring for siren operation shsll be permanently secured <br /> and protected fr~m direct precipitation. All wiring entrance ways to <br /> enclosures housing electronic equipment shall not preclude wall <br /> mounting. <br /> <br /> I. Siren speaker design shall be cf modular construction. 5'~odular design <br /> shall pr(r~ide siren operation despite single speaker damage or physical <br /> hazards from the surroundings or meclna~cal failure of the structure <br /> for any reason. Sirens shall operate in temperature ranges of -35 <br /> degrees C to +E5 ~egrees C while batteries are maintained at <br /> degrees C or higher. ~ne effects of rain, ice, or ~now shall not hinder <br /> operations. <br /> <br /> J. ~1 sirens shall have sufficient mechar~ca! strenth and sufficient torque <br /> to withstand ~nd opsrate in winds 'Jp to t00 <br /> <br /> K. In compliance with FEIMA C-~GI-17 O~door Warning Systems Guide, sirens shall <br /> not produce sound pressure level greater than 123 db at ground level to <br /> ~revent hearing damage. Siren shall not produce potentially <br /> ~nviro~nr~,entally ' ~ ~ ~ ._ '-~ <br /> nazaraous ultrasonic sicnals. T-n{ = must be certified by <br /> the m~nufacturer. Control un.-~ muss r. rov!ae reasonable !ightm. ing and surge <br /> protection devices on the power input-to protect the anit from electrical <br /> <br /> <br />