MCD267
Universal Dimmer
Specifications
Voltage ...............................................................120VAC, 60Hz
Operating Temperature .................32°F to 104°F (0°C to 40°C)
Maximum Load Rating ..................................................... 600W
Minimum Load Required ................................................... 25W
Load Type Compatibility ..............................................25-600W
Incandescent and quartz halogen lamps
The following are limited to a maximum load of 500W:
Magnetic low voltage transformers, dimming rated
electronic low voltage transformers, dimming
rated cold cathode neon ballasts, dimming rated
2-wire fl uorescent(Advance MK X orequivalent)
and compact fl uorescent ballasts
U.S. Patent 6,175,220. Other utility,
design, and foreign patents pending.
Installation Instructions
UNIT DESCRIPTION
The Miro™ MCD267 Universal Dimmer is mounted inside a wall box and framed
by an architectural screwless Miro wall plate (required and sold separately).
When used in conjunction with optional Miro MCD68 multilocation controllers,
the MCD267 offers control of a dimming circuit from multiple locations.
Load Types
Use the Miro Universal Dimmer for these load types (at 120V):
• Incandescent and quartz halogen lamps (25-600W)
• Dimmable magnetic or electronic low voltage transformers (25-500W)
• Dimmable cold cathode, neon ballasts (25-500W)
• Dimmable, 2-wire fl uorescent (Advance MK X or equivalent) and compact
fl uorescent ballasts (25-500W)*
* Lamps must be burned in to manufacturer’s specifi cations before use.
See “Fluorescent Setup” for confi guration information.
Do not mix different load types on the same dimmer.
Do not use with fl uorescent fi xtures other than those listed
Derating
When more than one dimmer is installed in a multi-gang box, it is necessary to
reduce the maximum load on each dimmer:
• For a dimmer in either end position of a multi-gang box, reduce its maximum
load by 100W.
• For a dimmer in a central position of a multi-gang box, reduce its maximum
load by 200W.
CAUTION
To reduce the risk of
overheating and possible
damage to other equipment,
do not install to control
a receptacle, or a motor-
operated appliance.
CAUTION
Afi n de réduire le risque de
surchauffe et la possibilité
d’endommager d’autres
matériels, ne pas installer
pour commander une prise
ou un appareil à moteur.
INSTALL IN COMPLIANCE WITH ALL APPLICABLE CODES AND
STANDARDS.
Failure to follow these instructions may cause personal
injury or equipment damage.
INSTALLATION
For ease of installation, use in a wall box that is at least 2
1
/
2
” deep.
1. Disconnect power to circuit by turning circuit breaker OFF before installation.
2. Remove existing cover plate and switch.
3. Temporarily attach the steel subplate for the
Miro cover plate to the wall box.
4. Pull the wiring through the new Miro subplate.
5. Strip existing wires 1/2”. If two wires will be
connected to the same terminal on a Miro device, both
wires must be the same gauge (12AWG or 14AWG).
6. ...select your application to continue...
Single Location Application
7. Wire the LINE (black), NEUT (white), and GND supply wires to the
correspondingly marked screw terminals and wire the load (black) wire to the
LOAD terminal, according to Figure 1.
LOAD
LINE
GND
Wire Legend
Ground
Line
Neutral
NEUT
Figure 1: Single location wiring
MCD267
DIMMER
CAUTION
TURN THE POWER OFF AT THE CIRCUIT BREAKER
BEFORE INSTALLING THE DEVICE.
Install only using a UL Listed Miro cover plate and subplate
assembly. If you do not have the proper Miro subplate for your
application, obtain one from any supplier of Miro devices.
Steel
subplate
Wall box
GND
LOAD
LINE
GND
REMOTE
REMOTE
MCD68
Multilocation
Controller
MCD267
DIMMER
Supply
Wires
Load
Wires
12AWG
or
14AWG
between
Miro
devices
Wire Legend
Traveler
Ground
Line
Neutral
NEUT
Connect traveler wire (red) between the
REMOTE terminals on each device in the circuit.
Max. traveler wire 200' (60m).
Figure 2: Two location wiring
Two Location Application
Use with one Miro MCD68 multilocation controller.
DO NOT WIRE WITH CONVENTIONAL SWITCHES
AS PART OF a 3-WAY or 4-WAY SWITCHING CIRCUIT.
7. Install the MCD267 dimmer and the MCD68 controller, following the wiring
diagram in Figure 2. The dimmer can go in either location. Use a 3-wire
and ground cable to wire between devices. (In existing 3-way switched
installations this wire is already in place.) The MCD68 requires a ground. Be
sure to verify the ground connection.
Three or More Location Application
Use with two or more Miro MCD68 multilocation controllers, for multilocation
control.
DO NOT WIRE WITH CONVENTIONAL SWITCHES
AS PART OF a 3-WAY or 4-WAY SWITCHING CIRCUIT.
7. Install the MCD267 dimmer and the MCD68 controllers, following the wiring
diagram in Figure 3. The dimmer may be in any position in the circuit. Use a
3-wire and ground cable to wire between devices. (In existing 3-way switched
installations this wire is already in place.) Be sure to verify the ground
connection.
Finishing the Installation
8. Using the instructions provided with the Miro cover plates, attach each of
the Miro devices to their associated metal subplate and to the wall box, then
attach the Miro cover.
9. Switch the circuit breaker ON.
10. Make sure the LED on the MCD267 dimmer is lit. There is no LED on the
MCD68 controller.
GND
REMOTE
Load
Wires
Wire Legend
Traveler
Ground
Line
Neutral
GND
LOAD
LINE
GND
REMOTE
REMOTE
MCD68
Multilocation
Controller
MCD267
DIMMER
Supply
Wires
12AWG
or
14AWG
between
Miro
devices
MCD68
Multilocation
Controller
NEUT
Connect traveler wire (red) between the
REMOTE terminals on each device in the circuit.
Max. traveler wire 200' (60m).
Figure 3: Wiring for 3 or more locations
Fluorescent Setup
If the dimmer will operate 2-wire fl uorescent or compact fl uorescent loads, a
special confi guration step is required; if not, skip ahead to “Operation.”
1. Press and hold
until the LED fl ashes yellow (about 2 seconds).
2. Release
then press the top of the device paddle ( ) until LED briefl y fl ashes
red.
3. Press and hold until the LED changes to green (about 2 seconds).
4. To reconfi gure the dimmer to control non-fl uorescent loads, repeat the above
steps 1-3, but press the bottom of the device paddle (
) rather than in step
2; the LED briefl y fl ashes green to confi rm the cancellation of fl uorescent
operation.
OPERATION
Tap once Fade the load to its last-used level
Tap twice Full bright
—
— Press and hold Increase the present level
Tap once Fade the circuit to OFF
—
— Press and hold Decrease the present level
Note: The dimmer may feel warm to the touch during normal operation.
When you
see
in the
instructions,
touch the top
of the switch
as directed.
When you
see
in the
instructions,
touch the
bottom of
the switch as
directed.
Replacing Lamps
When a lamp must be replaced, use the Air Gap Isolation feature for safety. This
feature is only available at the dimmer, which can be identifi ed by its status LED.
(The MCD68 Multilocation Controllers do not have an LED and can not operate
this feature.)
To activate the feature from the dimmer:
Press
FIRMLY, so that the paddle clicks and latches in. Make sure the status
LED is extinguished, indicating that it’s safe to relamp.
To release and return to normal operation, press
.
Power Fail Memory
After a power failure, all Miro devices automatically return to the state that they
were in immediately prior to loss of power.
CLEANING
Clean only using a cloth dampened with water and a little mild detergent.
Use of solvents or hydrocarbon-based cleaners may cause permanent damage
TROUBLESHOOTING
With one or more MCD68 multilocation controllers in the circuit, the dimmer
works, but the multilocation controllers don’t function.
LINE and LOAD connections might be reversed. Check to make sure the
connections are correctly terminated at the dimmer.
The MCD68 Multilocation Controllers require a ground connection. Check to
make sure the ground wires are securely connected.
The light level changes without pressing any switches, or the dimmer does not
respond when I press its switch.
There may be a problem with the traveler wire. Remove power from the
circuit. Disconnect all traveler wires from the dimmer’s Remote terminals.
Restore power. If the dimmer now operates the load properly, the problem
is with the traveler wire. It may be too long or may be shorted to another
conductor.
The Dimmer does not work and the status LED is fl ashing red
• at 1Hz (5 times in 5 seconds):
The dimmer has detected an unsuitable load or a load below 25 watts.
To clear the fault condition, tap
and wait for the LED to turn green.
Disconnect power, check the load, restore power and try again.
Warranty Information
Manufacturer warranties its products to be free of defects in materials and
workmanship for a period of five (5) years. There are no obligations or liabilities
on the part of manufacturer for consequential damages arising out of, or
in connection with, the use or performance of this product or other indirect
damages with respect to loss of property, revenue or profit, or cost of removal,
installation or reinstallation.
03871r2 9/2007
• at 2Hz (10 times in 5 seconds):
The dimmer has detected an overload condition and has shut down.
To clear the fault condition, tap and wait for the LED to turn green.
Disconnect loads in excess of rated load and try again.
• at 3Hz (15 times in 5 seconds):
The dimmer has detected a short-circuit condition and has shut down.
To clear the fault condition, tap
and wait for the LED to turn green.
Remove power, rectify the short-circuit condition, restore power and try again..
2800 De La Cruz Blvd.
Santa Clara, CA 95050
Phone: 800.879.8585
www.wattstopper.com
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Recycle
1061 South 800 East
Orem, UT 84057
Phone: 800.555.9891
www.vantagecontrols.com
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