SECTION 275116 - PUBLIC ADDRESS AND MASS …
This master should be used by designers working on Port of Portland construction projects and by designers working for PDX tenants (“Tenants”). Usage notes highlight a few specific editing choices, however the entire section should be evaluated and edited to fit specific project needs.
SECTION 275116 - PUBLIC ADDRESS AND MASS NOTIFICATION SYSTEMS
GENERAL
1. DESCRIPTION
A. This section describes a complete public address system that interfaces with the existing PDX public address system.
2. RELATED WORK SPECIFIED ELSEWHERE
A. Section 260519, Low-Voltage Electrical Power Conductors and Cables
B. Section 260533, Raceway and Boxes for Electrical Systems
C. Section 260553, Identification for Electrical Systems
D. Section 283100, Fire Detection and Alarm
3. SUBMITTALS
A. Submit the following:
1. Pre-Design Narrative: Prepare pre-design narrative of anticipated system design which shall include:
a. Proposed connection points to existing terminal building public address system.
b. Voice evacuation requirements or impacts.
c. Types of components and general locations of use.
2. Shop Drawings: Prepare shop drawings of system design. Shop drawings shall be new, prepared by the Contractor using CAD and backgrounds of the tenant drawings or PDX terminal lease plot drawings if required by the Port. All shop drawings shall be the same size, as approved by the Port, with title blocks, identifying drawing number and any reference drawings. Fully dimension all plans and elevations.
a. Shop drawings shall include, but not be limited to, the following:
1) Complete floor plans with all systems included as part of the work of this section shown, at 1/8"=1'-0" scale.
2) Sections of congested areas at 1/4"=1'-0" scale.
3) Controls at scale to suit controls supplier.
4) Fabricated equipment at not less than 1/4"=1'-0" scale.
b. Shop drawings shall indicate, but not be limited to, the following:
1) Conduit routing and wiring.
2) Control logic and riser diagrams.
3) Schematic diagrams.
4) Panel and rack elevations.
5) Sequence of operation.
3. Product data with wiring schematics.
4. Installation and record drawings.
a. Installation and record drawings shall consist of reproducible drawings with all outlets, devices, terminal cabinets, conduits and wiring shown. Prints of these drawings shall be submitted to the Port for approval prior to starting installation.
b. The Contractor-submitted drawings, when approved, will then form the basis for installation.
c. At the completion of the work, incorporate all deviations from the installation drawings into the reproducibles to indicate “as built” conditions. Submit these drawings to the Port as record drawings for the system.
5. Operation and maintenance manuals.
PRODUCTS
1. PUBLIC ADDRESS AMPLIFIERS
A. Solid state power amplifiers with the following features:
1. Output Power: 120 watts RMS minimum, as required for speaker load. 70 volt line output.
2. Frequency Response: 20 - 20,000 Hz +1 dB.
3. Total Harmonic Distortion: 0.01 percent at 1 kHz.
4. Built-in protection circuitry.
5. Rack-mountable.
6. Plug-in input module.
B. Acceptable Manufacturers: Toa P900 series, or equal.
2. LOCAL AREA PAGING AMPLIFIERS
A. Solid state utility amplifiers with the following features:
1. Output power: 30 watts RMS minimum, as required for speaker load. 70 volt line output.
2. Frequency Response: 20 - 20,000 HZ + 1 dB.
3. Total Harmonic Distortion: 0.05 percent at 1 kHz.
4. Balanced, low impedance microphone input.
B. Acceptable Manufacturers: Toa, P900 series, or equal.
3. WALL SPEAKERS
A. Speaker: Four-inch diameter, 8 ohm impedance, with 10 ounce ceramic magnet, 70 volt line multi-tap transformer set at 1 watt.
B. Enclosure/Baffle: Recessed, round enclosure and round white finish baffle. Baffle shall attach to the enclosure with torsion springs and no visible screws.
C. Acceptable Manufacturers: UL listed speaker-transformer-enclosure package. Lowell ULT-WB4T-CT70-A-ULDX104-T, or equal.
4. SUSPENDED SPEAKERS
A. Speaker: Eight-inch diameter, 8 ohm impedance, dual voice coil, with 10 ounce ceramic magnets, two 70 volt line multi-tap transformers, single capacitor, set at 1 watt.
B. Enclosure/Baffle: Chain suspended, round enclosure with capability for incremental vertical adjustment, permitting precise positioning above suspended ceilings.
C. Acceptable Manufacturers: UL listed speaker-transformer-enclosure package. Lowell ULD-MKS-8B3-2T70-C, or equal.
5. AUTOMATIC LEVEL CONTROLLER
A. Automatic level controllers for zones as indicated on the drawings. Each device shall provide the following features:
1. Gain control over a range of up to 40 dB, based on comparing memory data with real time measurements.
2. Governed by a microprocessor controlled by embedded software, responding to ambient sound pressure levels measured continuously in each zone.
3. Variable averaging time.
4. LED metering.
5. Rack-mountable.
B. Acceptable Manufacturers: Symetrix 571, or equal.
6. MICROPHONES
A. Local Area Paging:
1. Hand-held, push-to-talk dynamic microphone with 5-foot (extended) coil cord and 4-pin XLR connector. Shure 404B, or pre-bid approved equal.
B. Sensing:
1. Cardioid dynamic microphone mounted to brushed stainless steel, single gang cover plate. Telex WP300, or equal.
2. Provide a minimum of two sensing microphones for each zone of installation.
7. WIRE
A. Speaker: Two conductor, stranded tinned copper, twisted pair, 16 gauge, PVC jacket. Belden 8471, or equal.
B. Sensing Microphone: Two conductor shielded, stranded tinned copper, twisted pair, 18 gauge, polyethylene jacket. Belden 8760, or equal.
C. Local Area Paging Microphone: One pair shielded plus one pair unshielded, tinned copper, 20 gauge, polyethylene jacket. Belden 8722, or equal.
8. LOCAL AREA PAGING RELAY
A. Self-powered relay to transfer hold room speakers from terminal network to local paging, as controlled by paging microphone. Soundolier PSRM1, or equal.
9. MICROPHONE CONNECTOR
A. Single gang plate with 4-pin XLR connector.
10. EQUIPMENT RACK
A. Cabinet relay rack for standard 19-inch panels. 65 1/2 inches overall height. Removable rear door. 16 gauge CRS. Soundolier WA100-61, or equal.
EXECUTION
1. INSTALLATION
A. Install speaker enclosures as required.
B. Provide power for amplifiers.
C. Where dual voice coil speakers are installed, connect one transformer/voice coil to the public address system, and the other to the fire alarm voice evacuation system. Alternate speaker polarity wiring to prevent cross talk over fire alarm voice coil.
D. Final speaker terminations shall be made under the direct supervision of the equipment supplier.
E. Install amplifiers and other equipment per manufacturers’ recommendations and as detailed on the drawings. Adjust speaker taps for uniform sound coverage.
2. WIRING
A. Install system with all conduits, outlet boxes, enclosure fittings, connectors, and accessories necessary to ensure a complete operating system in compliance with applicable codes and regulations.
B. Install conduits, outlet pull, and junction boxes in accordance with Section 260533.
C. Wire and Cable:
1. Install all wiring in metal conduit or within equipment. Install conductors in accordance with Section 260519. Cables within equipment shall be carefully cabled, laced, and tagged with E-Z code markers indicating circuit number and type. Cable runs connecting with existing system networks shall be tagged according to Port marking standard. Use markers on all power conductors at each outlet, pull box, and at each equipment enclosure.
2. Do not install microphone wiring in any conduits carrying speaker wires.
D. Outlet pull and junction boxes shall be painted red on the exterior with “PA” permanently marked in black.
3. TESTING
A. Test communication circuit cable and wiring for continuity, shorts, and grounds by use of an ohmmeter prior to energizing circuits.
B. Provide all instruments, equipment, and personnel necessary for testing of electrical installations and ensure such personnel are available during final testing to make immediate adjustments. Maintain written records of all test results, with data carefully and accurately assigned to the cable identification as specified. Perform all testing in the presence of the Port unless specifically waived. Submit a copy of all test data to the Port.
C. A factory-trained manufacturer’s representative shall supervise the final testing of the system. Testing shall be subject to Audio Engineering Society Standards.
4. TRAINING
A. Provide operation and maintenance training for Port personnel.
1. Conduct a minimum of three maintenance training sessions (one for each shift). Maintenance training sessions shall include a walk-through of the completed facilities identifying the location and means of access to every device.
2. Conduct training sessions for two operator levels.
a. Operator training. Provide a minimum of three refresher and system update training sessions (one for each shift) of on-the-job training.
b. Supervisor training. Provide a system update training session for supervisory functions.
3. Training sessions shall be given by a fully qualified, trained representative of the equipment manufacturer who is thoroughly knowledgeable of the specific installation.
END OF SECTION 275116
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