2021-289-AMS-CT Wilson construction-Orange County Renovations

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Construction Documents 20052.02 / Orange County - Justice Facility 28 4600 - 7 FIRE DETECTION AND ALARM b. Door hold open magnets shall be furnished with keepers, door chains, and other accessories as required to properly hold open doors as indicated on the Drawings. c. Wall mounted magnetic door holders and separate heavy duty closers shall be used instead of combination door control units. d. Holding force of the magnet shall be appropriate for the door to be held open. Door hold open magnets shall operate in a fail safe manner, i.e., the door shall release in event of a failure of voltage to the device. e. Power Source: Door hold open magnets shall be configured to operate from a nominal 24 VDC system as supplied by the FACP or other power supply listed for the purpose. f. All hold open magnet supply sources, whether a part of the FACP or whether derived from a separate power supply, shall be supervised. g. Door hold open magnet circuits which use step-down transformers, 120 VAC, or local relays are not permitted. h. Door shall close after 60 seconds of the power loss. 9. Battery Power Supply (BPS) &/or Supplementary Notification Appliance Circuit (SNAC): These types of panels shall be completely maintenance free, shall not require liquids, fluid level checks or refilling, and shall not be capable of producing spills and/or leaks. Batteries shall be sealed gel-cell type with expected life of 10 years. Battery voltage shall be as required by the FACP and related equipment. Battery shall have sufficient capacity to power the fire alarm system for not less than 60 hours plus 15 minutes of alarm upon a normal AC power failure. Battery cabinet shall be twice the size of the batteries it will contain. NAC circuits shall not exceed 75% of maximum current load allowed. a. The voltage drop at EOL must not exceed 14% of the expected battery voltage after the required standby and alarm times. Determine worst case voltage at far end of each NAC circuit. The results must not be than the minimum listed rating on the device. b. Where voltage drop or capacity limits are exceeded provide additional NAC panels as required for a fully functional system. c. All power supplies shall be capable of withstanding prolonged short circuits in the field wiring, either line-to-line or line-to-ground, without damage. d. All power supplies shall be equipped with battery charging using dual-rate charging techniques for fast battery recharge. 10. Enclosure: All equipment enclosures shall be third party listed suitable for surface or semi-flush mounting. Cabinet and front shall be corrosion resistant, given a rust-resistant prime coat, and manufacturer's standard finish. The door shall provide a key lock and a glass opening for viewing indicators. Door hinge shall be field selectable (left or right). E. Wiring 1. Addressable loop (signaling line) circuits shall be wired with type FPL/FPLR/FPLP fire alarm cable, AWG 18 minimum, low capacitance, twisted shielded copper pair. Cable shield drain wires are to be connected at each device on the loop to maintain continuity, taped to insulate from ground, and terminated at the FACP. Acceptable cables include Atlas 228-18-1-1STP, BSCC S1802s19 (same as EEC 7806LC), West Penn D975, D991 (AWG 16), D995 (AWG 14), or equal wire having capacitance of 30pf/ft. maximum between conductors. Belden 5320FJ acceptable if only FPL rating needed. a. Unshielded cable, otherwise equal to the above, is permitted to be used if the manufacturer’s installation manual requires, or states preference for, unshielded cable. b. In underground conduit, use Type TC or PLTC cable (PE insulated) to avoid problems from moisture. c. The following conductor color coding shall be maintained throughout the system: 1) Initiating Circuits: Red (+)/White (-) 2) Initiating Circuits, Smoke Only: Violet (+)/Grey (-) 3) Signal Line Circuits: Red jacket with Red (+)/Black(-) 4) Alarm Indicating Appliance Circuits: Blue (+)/Black(-) DocuSign Envelope ID: 09980A3B-0691-41B4-854D-3865F2287392