18. Division 27 Communication.pdf

275116-2

SECTION 275116

PAGING SYSTEM

PART 1: GENERAL

1.01 RELATED DOCUMENTS

A. The general provisions of the contract, including General and Supplementary Conditions and General Requirements (if any) apply to the work specified.

1.02 DESCRIPTION OF WORK

A. Provide and install new mixer/power amplifier(s) as indicated on the drawings.

B. Provide and install new ceiling speakers.

C. Provide and install new speaker wiring in raceways.

D. Provide proper input facilities for reception of audio signals from a telephone line from the Aeronautical Center central paging equipment located in the Aviation Records Building.

1.03 SUBMITTALS

A. Product listing by manufacturer's catalog number for each application specified.

B. Descriptive catalog sheets for each product listed.

PART 2 - PRODUCTS

2.01 MATERIALS

A. Mixer/power amplifier: Dukane, Model 1A1660 or approved equal, capable of delivering 60 watts of continuous power with less than 1% harmonic distortion, 20 Hz to 20,000 Hz. The signal-to-noise ratio must be greater than 70 dB for auxiliary and telephone/page inputs. The frequency response must be 20 to 20,000 Hz plus or minus 1 dB at 9 dBa below rated output (direct) per EIA SE101A. Output must be 70.7 volt.

1. The mixer/power amplifier must have 6 inputs, and must utilize a telephone/page input module (Input 6) to interface with telephone line.

The unit must have both an electronic foldback and thermal overload protection circuit, both self-restoring. The mixer/power amplifier must have at least 30 dB of muting. Individual controls for inputs 1 to 5, tone controls, master control and illuminated power switch must be front panel accessible. The telephone/page control must be rear mounted.

2. The mixer/power amplifier must operate on 120 VAC, 60 Hz, and consume approximately 1.7 amperes at rated output. The unit must

275116-2 have approximate dimensions of 17" wide, 13" deep and 3.5" high, and must be shelf mounted.

B. Provide equipment rack for support of amplifiers and ancillary devices. Depth of rack must be as shallow as possible to accommodate amplifiers provided.

C. Provide telephone/paging input module equal to Dukane Model 2A42.

D. Ceiling speaker assembly: Speaker must be 8-inch seamless cone type with additional high frequency cone and matching transformer, 10-ounce minimum ceramic magnet, 8 ohms impedance, equal to Dukane Model No. 5A607.

Baffle must be circular design, molded of solid white, high-impact styrene, with screw driver-adjustable volume control mounted at center of baffle. Assembly must be equal to Dukane Model No. 6A635, except with speaker as specified above.

E. Ceiling speaker backboxes: Round, equal to Dukane Model No. 8A300.

F. Speaker output bridge: Steel universal type, equal to Dukane Model 677-67.

G. Cables for speaker circuits: No. 16 AWG, twisted, unshielded pair, equal to

Dukane No. 176-187.

PART 3 - EXECUTION

3.01 INSTALLATION

A. All ceiling speakers must have line matching transformer taps set on 1/2-watt.

B. An operational test of the complete system must be conducted in the presence of the CO/COR. The Contractor must provide material and personnel required to conduct the test, and necessary adjustments must be made.

END OF SECTION

275116 - 1

SECTION 275116

PUBLIC ADDRESS AND MUSIC EQUIPMENT

PART 1 GENERAL

1.1 RELATED DOCUMENTS

A. The general provisions of the contract, including General and Supplementary Conditions and General Requirements (if any) apply to the work specified.

1.2 DESCRIPTION OF WORK

A. Provide and install new mixer/power amplifier(s) as indicated on the drawings.

B. Provide and install new ceiling speakers.

C. Provide and install new speaker wiring in raceways.

D. Provide proper input facilities for reception of audio signals from a telephone line from the Aeronautical Center central paging equipment located in the Aviation Records Building.

1.3 SUBMITTALS

A. Product listing by manufacturer's catalog number for each application specified.

B. Descriptive catalog sheets for each product listed.

PART 2 PRODUCTS

2.1 MATERIALS

A. Mixer/power amplifier: Dukane, Model 1A1660 or approved equal, capable of delivering 60 watts of continuous power with less than 1% harmonic distortion, 20 Hz to 20,000 Hz. The signal-to-noise ratio must be greater than 70 dB for auxiliary and telephone/page inputs. The frequency response must be 20 to 20,000 Hz plus or minus 1 dB at 9 dBa below rated output (direct) per EIA SE101A. Output must be 70.7 volt.

1. The mixer/power amplifier must have 6 inputs, and must utilize a telephone/page input module (Input 6) to interface with telephone line.

The unit must have both an electronic foldback and thermal overload protection circuit, both self-restoring. The mixer/power amplifier must have at least 30 dB of muting. Individual controls for inputs 1 to 5, tone controls, master control and illuminated power switch must be front panel accessible. The telephone/page control must be rear mounted.

2. The mixer/power amplifier must operate on 120 VAC, 60 Hz, and consume approximately 1.7 amperes at rated output. The unit must have

275116 - 2 approximate dimensions of 17" wide, 13" deep and 3.5" high, and must be rack mounted.

B. Provide wall mounted equipment rack for support of amplifiers and ancillary devices. Dukane #13A152 or approved equal.

C. Provide telephone/paging input module equal to Dukane Model 2A42.

D. Ceiling speaker assembly: Speaker must be 8-inch seamless cone type with additional high frequency cone and matching transformer, 10-ounce minimum ceramic magnet, 8 ohms impedance, equal to Dukane Model No. 5A607. Baffle must be circular design, molded of solid white, high-impact styrene, equal to Dukane Model No. 6A338.

E. Ceiling speaker backboxes: Round, equal to Dukane Model No. 8A300.

F. Speaker support bridge: Steel universal type, equal to Dukane Model 677-67.

G. Cables for speaker circuits: 2 - No. 16 AWG, twisted, unshielded pairs, West Penn #245 or approved equal, unless noted otherwise on the drawings.

PART 3 EXECUTION

3.1 INSTALLATION

A. All ceiling speakers must have line matching transformer taps set on 1/2-watt.

B. An operational test of the complete system must be conducted in the presence of the C.O.R. The Contractor must provide material and personnel required to conduct the test, and necessary adjustments must be made.

END OF SECTION