[ELECTRICAL SPECIFICATION]{.underline}

[SECTION 16851]{.underline}

[ARCHITECTURAL LIGHTING CONTROL SYSTEM]{.underline}

[PART 1 - GENERAL]{.underline}

1.01 WORK INCLUDED

> Provision, installation and testing of architectural lighting control
> system.

1.02 RELATED WORK

> A. Conduit
>
> B. Wire and cable
>
> C. Control wiring
>
> D. Any other related sections of specifications 16001 Electrical Work.

1.03 SYSTEM DESCRIPTION

> A. System shall use solid state devices for control of lighting loads.
>
> B. Dimmer equipment cabinets and fixture packs contain all power
> devices.
>
> C. All user operated controls are low voltage.
>
> D. System shall be factory pre-assembled. Sub-assembly-type system for
> contractor final construction in field shall not be acceptable.

1.04 REGULATORY REQUIREMENTS

> A. National Electric Code (N.E.C.)
>
> B. National Electric Manufacturer\'s Association (N.E.M.A.)
>
> C. Underwriters Laboratories, Inc. (UL)

1.05 SUBMITTALS

> A. Submittals shall be as specified.
>
> B. Submit all shop drawings showing all mechanical and electrical
> construction details.
>
> C. Submit complete interconnecting schematic diagrams.
>
> D. Submit manufacturer\'s standard catalog data and specification
> sheets giving all construction and specification information on
> components and sub-systems.
>
> E. Provide test data as required to demonstrate conformance with PART
> 2 of this specification.

1.06 QUALITY ASSURANCE

> A. Manufacturer: Company specializing in architectural lighting
> control systems with a minimum of ten years experience.
>
> B. The entire system shall be listed by Underwriters Laboratories,
> Inc. In addition, each dimming module shall be specifically listed by
> UL for control of the required loads (i.e., incandescent,
> fluorescent).
>
> C. The dimming system shall meet Military Standard 217C to ensure a
> minimum average design lifetime of ten years continuous operation.
>
> [PART 2 - PRODUCTS]{.underline}

2.01 ACCEPTABLE MANUFACTURER

> A. Lutron Electronics Company, Inc.

2.02 DIMMING CABINETS

> A. Cabinets shall be wall or floor mounted NEMA grade, constructed of
> sheet steel plates not less than #14 U.S. gauge.
>
> B. Dimming cabinets shall be completely pre-wired by the manufacturer.
> The contractor shall be required to provide input feed wiring, load
> wiring, and control wiring which terminates to a set of clearly marked
> low-voltage terminals. No other wiring or assembly by the contractor
> shall be permitted.
>
> C. Cabinets shall contain output circuit breakers to provide primary
> line side protection and outgoing branch circuit protection for each
> dimming module. Circuit breakers shall be designed to trip within 8
> milliseconds after a 400 ampere surge. Circuit breakers shall contain
> a visual trip indicator and shall be rated at 10,000 AIC (120V).
>
> D. Cabinets shall contain current carrying terminals with factory
> installed brass or copper jumpers. These jumpers will enable power to
> completely bypass the dimmer modules. Bypass jumpers shall be clearly
> and permanently labeled and shall be reusable at any time. Low voltage
> control signal methods of bypass shall not be acceptable.
>
> E. Cabinets shall be cooled exclusively by means of free convection,
> unaided by fans.
>
> F. All load current carrying components shall be mechanically attached
> to a black anodized heat sink. The readings of three temperature
> probes placed in the upper quarter of the cabinet equi-distant from
> each other and the cabinet walls shall neither exceed ambient
> temperature by more than 15oC nor differ from each other by more than
> 5oC.

G. Internal wire used within the cabinet shall be UL listed AWM and have
a 105oC temperature rating clearly labeled on the surface of the wire.
All wiring shall be harnessed with cable ties or wire ducts at
sufficient intervals to present a neat, orderly appearance. All field
connections shall be provided to allow the use of stranded or solid wire
for field connections.

> H. All solid state circuit boards shall be made of UL approved flame
> retardant epoxy glass material, and shall use plate-through holes.

2.03 DIMMER MODULES

> A. Silicon thyristors shall be used to control the power furnished to
> the loads. The complete load current shall be carried by these
> devices. They shall be capable of withstanding surges, without
> impairment to performance, of 6000 volts, 3000 Amps as specified by
> I.E.E.E. std. 587-1980. In addition, under fully loaded operating
> conditions, all devices shall operate at a minimum 20oC safety margin
> below the component temperature rating.
>
> B. A positive air gap switch shall be employed with each dimmer to
> insure that the load circuits are open when the dimmer is switched
> off. Use of semi-conductors to accomplish this result shall not be
> acceptable.
>
> C. The dimmers shall be designed to respond to a control signal not
> exceeding 42 VDC or 30 VAC (class II wiring maximums) which shall be
> independent of the phase connection to the module.
>
> D. All modules shall be voltage regulated so that ± 10% change in line
> voltage shall cause no more than ± 3% change in output voltage.
>
> E. All modules shall provide a smooth and continuous \"square law\"
> dimming curve throughout the entire dimming range.
>
> F. All modules shall be completely modular in nature and
> interchangeable with each other within the cabinets to allow ease of
> maintenance and future modification and/or expansion of the system.

G. All dimmers shall be 98% or greater in efficiency at 100% intensity,
100% full load.

> H. Incandescent
>
> 1\. All modules shall employ electronic soft start operation: dimmer
> shall turn on at 0o conduction angle and fade up to set lighting
> level. Completion of operation must occur within 0.5 seconds without
> overshoot. Performance shall be independent of light level.
>
> 2\. Filtering for incandescent loads shall be provided in each dimmer
> so that current rise time shall be at least 350 microseconds at 50%
> rated dimmer capacity, and at no point rise faster than 30
> mA/microsecond at a 90o conduction angle as measured from 10-90% of
> the load current wave form.
>
> 3\. Incandescent Standard
>
> Incandescent modules shall be rated to control 1200 to 7200 watts of
> standard 120 volt tungsten load. Minimum light levels shall be user
> adjustable.
>
> 4\. Non-Dim Module
>
> The non-dim module shall be rated to control 2000 VA of tungsten,
> fluorescent or other lighting loads or non-lighting loads per section.
> Each module contains up to three sections. The module shall contain
> electrically held mercury contactors rated for a minimum of 35
> Amperes. When used with a preset control system, the modules shall
> turn off and on positively at the start of the light level transition
> period.

2.04 CONTROLS

> A. Controls shall be low voltage type as specified here and as listed
> below and/or shown on the drawings. Switch box controls shall use low
> voltage Class II wiring, electrically isolated from power wiring by
> means of a UL listed Class II transformer.
>
> B. Faceplates shall be machine fabricated from a single piece of solid
> brushed aluminum.
>
> C. Faceplates shall attach to the wallbox using no visible means of
> attachments and shall be attached in a manner so as to prevent
> unauthorized removal (i.e., magnets or Velcro are not acceptable).
>
> D. Faceplate graphics shall be silk-screened by the manufacturer and
> shall be standard graphics. The graphics process shall be such that
> the graphic material chemically bonds to the metal plate base, so that
> it resists removal via commercial cleaning solutions or scratching by
> fingernails.
>
> E. Wiring to controls from the dimmer equipment panels shall utilize
> low voltage class II wiring. Connections to the controls shall be made
> to clearly numbered leads on the controls.
>
> F. Preset Control Systems
>
> Each flush-mount unit shall consist of four touch buttons to provide
> scene selection, solid state LED\'s to indicate which scene is
> activated, individually illuminated potentionmeters to indicate
> lighting levels of each zone and electronic fade between each scene.
> Fade rate for all zones shall be adjusted by one screwdriver
> adjustment at the panel. A fifth touch-button shall switch the system
> off. The entire preset section shall be concealed behind a smoked
> translucent flush window which shall appear black except for the
> illuminated potentionmeters in the active scene.
>
> 1\. Preset activator control shall contain the same 4-scene activating
> buttons with indicating LED\'s and off button as specified above.
> Stations shall be as indicated on drawings.
>
> 2\. Entrance control station shall contain an on button with LED and
> an off button. This control shall call up a single pre-designated
> scene upon activation. Stations shall be as indicated on drawings.

2.05 QUALITY CONTROL

> A. All components used in the dimming system shall be inspected
> following Military Standard 105D or equivalent.
>
> B. Dimming module main power semiconductors shall be 100% tested at a
> case temperature of 100oC and with rated voltage applied for a minimum
> of 48 hours.
>
> C. The completely assembled dimming system shall be operated at full
> rated load for a minimum of five hours before shipment.
>
> D. Finished system shall be fully tested for proper operation of all
> control functions per system approved submittals.
>
> E. Submittals shall include certification by the manufacturer of the
> successful completion of the tests described in paragraphs A, B, C,
> and D above.
>
> [PART 3 - EXECUTION]{.underline}

3.01 INSTALLATION

> A. The system shall be installed utilizing complete manufacturer\'s
> shop drawings and in accordance with these specifications.
>
> B. Upon completion of the installation and prior to removal of the
> bypass jumpers, the contractor shall completely test all line voltage
> power and low voltage control wiring for continuity and accuracy of
> connections. The jumpers shall remain in place until all loads have
> been fully tested and found to be free of miswires, short circuits or
> other wiring defects.

3.02 SYSTEM CHECK-OUT

> A. Upon completion of the installation, the system shall be completely
> checked out by a factory based engineer. The check out will be
> performed upon notification by the contractor that the system
> installation is complete and that all loads have been tested live for
> continuity and freedom from defects and that all control wiring has
> been connected and checked for proper continuity.
>
> B. Upon completion of the system check out, the engineer shall
> demonstrate the operation of the system to any interested parties.
>
> C. Warranty service to be done by factory based engineer.