Cut Sheet

h. Controls shall be capable of operating at the rated capacity;
this includes modified capacities for ganging configurations
which require the removal of fins. Operation at rated capacity
shall be possible across the full ambient temperature range,
without shortening design lifetime.
i. To ensure a precise color match between all plastic parts, color
variation of any matte finish control shall not exceed a delta E
of 1, CIE L*a*b* color units, as defined in ASTM E 308-99.
j. Dimmer shall provide smooth and continuous Square Law
dimming curve, for the full knob rotation, on their rated load
per The IESNA Lighting Handbook, 9th edition, p. 27-4.
k. Controls shall meet the applicable requirements of UL 20 and
UL 1472 referring to the inclusion of a visible, accessible air-
gap off switch and the limited short circuit test.
l. Controls shall withstand voltage surges of up to 4000V.
m.Dimmers shall be designed to reduce interference with radio,
audio, and video equipment.
n. Controls shall incorporate power-failure memory. Should
power be interrupted and subsequently returned, the lights
will come back on to the same levels set prior to the power
interruption. Restoration to some other default level is not
acceptable.
o. Controls shall not be susceptible to damage or loss of memory
due to static discharge.
p. Dimmer shall include voltage compensation to compensate
light output for variation in the AC line-voltage. Dimmers in
which the light output is not held constant with varying AC
line-voltage shall not be acceptable.
q. Controls shall operate in an ambient temperature range of
0°C (32°F) to 40°C (104°F).
r. 3-Way controls shall wire using conventional 3-way and 4-way
wire runs.
s. Dimmer shall be capable of operating in either 3-way switch
location.
t. Contractors shall install all backboxes with a minimum wallbox
depth of 2.5 inches.
2. Incandescent Dimmers
a. Provide incandescent dimmers for direct control of up to a full
20A lighting circuit, which is derated by 20% to 16 Amps per
the NEC.
b. Dimmers shall have a high-end of no less than 95% of line
voltage.
3. Remote dimming modules for high power loads
a. Where lighting loads exceed the full rated capacity of single
dimmers, provide a Centurion incandescent dimmer driving
high power modules. High power module and dimmer shall
be from the same manufacturer to ensure compatibility.
b. High power modules shall be remotely mounted.
c. High power module shall be rated and UL listed for control of
incandescent, magnetic low voltage, electronic low voltage,
fluorescent, and neon/cold cathode loads in increments of
2,000 Watts up to 30,000 Watts.
B. Wallplates Lutron Centurion Style
1. Wallplates shall be manufactured from durable polycarbonate
plastic with matte finish, and shall attach to the basic components
without using exposed hardware or screws.
2. Visible parts of dimmers or any wallplate shall exhibit ultraviolet
stability when tested with multiple actinic light sources as defined
in ASTM D4674-89.
CENTURION CONTROLS
PART 1 – GENERAL
1.01 SUMMARY
A. Scope: Provide, install and test all dimmers as specified herein for the
areas indicated on the drawings, specifications, and load schedules.
B. Related Sections: Section 16580 (Ballasts), Section 16570 (Dimming
Systems).
1.02 REFERENCES
A. UL 20, UL 1472, CSA, ISO 9001
1.03 SYSTEM DESCRIPTION AND OPERATION
A. Permanently installed, wallbox mounted dimmers
1.04 SUBMITTALS
A. Submit manufacturer's standard catalog data giving all application,
wiring, and installation information on basic components and wallplate
kits. Provide test data and/or samples as required to demonstrate
conformance with PART 2 of this specification.
1.05 QUALITY ASSURANCE
A. Manufacturer shall have a minimum of 10 years continuous
experience in manufacturing wallbox dimming products.
B. Dimmer controls shall be UL listed and CSA approved specifically for
each required load. Manufacturer shall provide file card or certificate
upon request. Universal load-type dimmers shall not be acceptable.
C. Manufacturer shall maintain ISO 9001 certification and provide a copy
of the certificate upon request.
1.06 WARRANTY
A. All devices shall be covered by a minimum one-year warranty.
PART 2 – EQUIPMENT
2.01 ACCEPTABLE MANUFACTURERS
A. Lutron Electronics Co., Inc.
2.02 EQUIPMENT
A. Controls Lutron Centurion Style
1. Performance
a. Dimmers shall provide full-range, continuously variable control
of light intensity.
b. Controls shall provide a rotary knob allowing the light level to
be set by the user. "Rotate-to-off" controls shall use the rotary
knob to turn the control on and off. "Preset" dimmers shall
provide a push on/push off switch integral to the rotary. For
preset dimmers, when the lights are on, the rotary knob shall
change the light level and when the lights are off, the rotary
knob shall preselect the light level the lights will turn on to.
c. Control on/off function must be accomplished utilizing a
mechanical air-gap switch to totally disconnect power from
the load during "off" condition, no leakage current shall be
present at the fixture(s).
d. Rotary Knob shall be captured behind wallplate.
e. Preset dimmers shall be capable of multi-location on and
mechanical air-gap off using standard 3-way and 4-way
switches.
f. Controls shall be able to have their visible plastic parts
replaced, for color changes in the field, without removing the
body of the control from the wall and without requiring special
tools.
g. Within rated capacity, dimmers shall be available for direct
control of incandescent loads.
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