English
Important Notes
Please read before installing.
1.
Caution:
To avoid overheating and possible damage to other equipment, do not use to con-
trol receptacles, or motor-operated or transformer-supplied appliances.
2.
Install in accordance with all national and local electrical codes.
3.
When no “grounding means” exist within the wallbox then the NEC
®
2005, Article 404-9
allows a wall control without a grounding connection to be installed as a replacement, as
long as a plastic, noncombustible wallplate is used. For this type of installation, cap or
remove the green ground wire on the timer and use an appropriate wallplate such as
Lutron’s Claro
®
or Satin Colors
TM
series wallplates.
4.
Maestro
®
Countdown Timers are not compatible with standard 3-way/4-way switches, for
use only with Accessory Switches (MA-AS, MSC-AS).
5.
Accessory Switches (MA-AS, MSC-AS) can not be used individually and must be used in
conjunction with a
Maestro Timer in a 3-way/4-way application.
6.
In any 3-way/4-way circuit use only one Timer with up to 9 Accessory Switches (MA-AS,
MSC-AS).
7.
Do not use where total lamp wattage is less than 5 W/VA or greater than wattage indicated
on unit label.
8.
Operate between 32 °F (0 °C) and 104 °F (40 °C).
9.
Protect control from dust and dirt when painting or spackling.
10.
Timer may feel warm to the touch during normal operation.
11.
Recommended wallbox depth is 2.5 in (64 mm) minimum.
12.
Maximum wire length between the Timer and the farthest Accessory Switch (MA-AS,
MSC-AS) is 250 ft (76 m).
13.
For safety reasons, do not use Timer to control fixtures that are the only source of illumina-
tion for an area.
14.
When controlling a combined fan and light load, the total may not exceed 3 A.
15. Clean Timers with a
soft damp cloth only.
Do not use any chemical cleaners.
Countdown Timer
MA-T51MN 120 V~ 60 Hz
600 W Lighting or 3 A Fan
Accessory Switch
MA-AS, MSC-AS 8.3 A 120 V~ 60 Hz
Multigang Installations
When installing more than one control in the same wallbox, it may be necessary to remove all
inner side sections prior to wiring (see below). Using pliers, bend side sections up and down until
they break off. Repeat for each side section to be removed. Removal of Timer side sections
reduces maximum load capacity. Refer to chart below for maximum Timer capacity.
Limited Warranty
(Valid only in U.S.A., Canada, Puerto Rico, and the Caribbean.)
Lutron will, at its option, repair or replace any unit that is defective in materials or manufacture within one year after purchase.
For warranty service, return unit to place of purchase or mail to Lutron at 7200 Suter Rd., Coopersburg, PA 18036-1299,
postage pre-paid.
THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS WARRANTIES, AND THE IMPLIED WARRANTY OF MERCHANTABILITY
IS LIMITED TO ONE YEAR FROM PURCHASE. THIS WARRANTY DOES NOT COVER THE COST OF INSTALLATION, REMOVAL
OR REINSTALLATION, OR DAMAGE RESULTING FROM MISUSE, ABUSE, OR DAMAGE FROM IMPROPER WIRING OR INSTAL-
LATION. THIS WARRANTY DOES NOT COVER INCIDENTAL OR CONSEQUENTIAL DAMAGES. LUTRON’S LIABILITY ON ANY
CLAIM FOR DAMAGES ARISING OUT OF OR IN CONNECTION WITH THE MANUFACTURE, SALE, INSTALLATION, DELIVERY,
OR USE OF THE UNIT SHALL NEVER EXCEED THE PURCHASE PRICE OF THE UNIT.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state. Some states do not
allow the exclusion or limitation of incidental or consequential damages, or limitation on how long an implied warranty may last,
so the above limitations may not apply to you.
This product is covered under one or more of the following U.S. patents: 4,835,343; 5,017,837; DES 353,798 and correspon-
ding foreign patents. U.S. and foreign patents pending. Lutron, Claro, and Maestro are registered trademarks and FASS and
Satin Colors are trademarks of Lutron Electronics Co., Inc. NEC is a registered trademark of the National Fire Protection
Association, Quincy, Massachusetts. © 2007 Lutron Electronics Co., Inc.
Technical Assistance
If you have questions concerning the installation or operation of this product, call the
Lutron Technical Support Center
. Please provide exact model number when calling.
U.S.A. and Canada (24 hrs/7days)
1-800-523-9466
Other countries 8am – 8pm ET
+1-610-282-3800
Fax +1-610-282-6311
http://www.lutron.com
Installation
1
1
Identifying the circuit type.
3
3
Removing wallplates and switches.
• Remove the wallplate and switch mounting screws.
• Carefully remove switch from wall
(do not remove wires)
.
2
2
One switch controlling a light fixture.
This switch will be a single-pole. The switch will
have insulated wires connected to two screws of
the same color plus a green ground screw.
Ground
(Bare Copper or
Green Wire)
Disconnecting switch wires.
4
4
Two switches controlling a light fixture.
Both switches will be 3-way. Each switch will
have insulated wires connected to three screws
plus a green ground screw. One of these wires is
connected to a screw of a different color (not
green) or labeled COMMON.
TAG
this wire on
both switches to identify when wiring.
Tagged wire
Different colored
screw (Common)
Ground
(Bare Copper or
Green Wire)
Three switches controlling a light fixture.
Two switches will be 3-way and one will be a
4-way.
Tag
the two 3-way switches as in the
Two-Location diagram above. The 4-way switch
will have insulated wires connected to four
screws plus a green ground screw.
TAG
the two
same color insulated wires which are connected
to opposite colored screws.
Tagged wires
Note: Screw
placement may
be different on
your switch.
Same colored
screw (or
marked IN or
OUT)
Ground
(Bare Copper or
Green Wire)
Danger:
Verify power to
each
switch
is OFF before proceeding.
Turning OFF power.
•
Turn power OFF at circuit breaker (or remove fuse).
Operation
Lutron Electronics Co., Inc.
7200 Suter Road
Coopersburg, PA 18036-1299, U.S.A.
Made and printed in the U.S.A. 2/07 P/N 030-929 Rev. A
030-929
• Easy-to-follow
Instructions
•
Instrucciones
Fáciles de Seguir
Incandescent/
120 V Halogen
No Sides
Removed
600 W
600 VA / 450 W
600 W
5 A
3 A
1 Side
Removed
500 W
500 VA / 400 W
500 W
4 A
3 A
2 Sides
Removed
400 W
400 VA / 300 W
400 W
3 A
3 A
Derating Chart
3c - Three-Location control
3b - Two-Location control
3a - Single-Location control
Maximum Load
Screw
Terminals:
Turn screws to
loosen.
Push-in
Terminals:
Insert screw-
driver. Pull
wire out.
Important Note:
Your wall switch may have two wires attached to the same screw (see illustra-
tions below for examples). Tape these two wires together before disconnecting. When wiring,
connect wires to the Timer the same way they were connected to the switch.
One wire in the
push-in terminal
and one to the
screw.
One continuous
wire to the
screw.
Looped Wire:
Turn screw to
loosen.
Important Wiring Information
When making wire connections, follow the recommended strip lengths and combinations for the
supplied wire connector.
Note:
All wire connectors provided are suitable for
copper wire only.
For aluminum wire, consult an electrician.
Timer
Accessory
Switch
Timer or
Accessory
Switch
Tap Button Options
•
Tap once when unit is off -
Controlled load turns ON and
countdown timer begins.
When time expires, load
turns OFF.
•
Tap once when unit is on -
Controlled load turns OFF
and countdown timer resets.
•
Tap twice quickly -
Controlled load turns on
without a time limit.
Press to increase time
Press to reduce time
LEDs
• Orange LEDs indicate timer duration
or remaining time in minutes
• Top green LED labeled ON has no
time limit
• Bottom LED blinks rapidly to indi-
cate 1 minute of time remaining
LEDs
(not available on Accessory Switch)
IMPORTANT NOTICE:
To replace bulb, power may be conveniently removed by pulling the
FASS
switch out on both the Timer and any Accessory Switches.
For any procedure other than routine bulb replacement, power must
be disconnected at the main electrical panel.
To learn about the
Advanced Features
of
Maestro Wall Controls including
locked preset and timer bypass disable, please visit:
www.lutron.com/maestro/advfeatures
or call the
Lutron Technical Support Center.
Lutron Technical Support Center 1-800-523-9466 24 hrs / 7 days
www.lutron.com
FASS
TM
- Front Accessible
Service Switch
Breaking Side
Sections
Each control has
inside section
removed.
Middle control has
two side sections
removed.
Do not remove
outside
sections.
Magnetic Low Voltage
Single-Location control
Wiring.
• For installations involving more than one control in a wallbox, refer to Multigang
Installations before beginning.
• Use the screw or push-in terminals when making connections on the Timer or
Accessory Switch.
• If push-in terminals are used, tighten screws securely.
• Wire all controls before mounting.
5
5
Multi-Location control
Wiring the Countdown Timer:
• Connect the
green
ground wire on the Timer to
the
bare copper
or
green
ground wire in the wall-
box. (See Important Note 4.)
• Connect the neutral wire in the wallbox to the
sil-
ver
screw terminal on the Timer. If a neutral wire
is not available in the wallbox, contact a licensed
electrician for installation.
• Connect the live wire (the wire leading to the cir-
cuit breaker or fusebox) removed from the switch
to the
black
screw terminal on the Timer.
• Connect the remaining wire removed from the
switch to the
brass
screw terminal on the Timer.
• Tighten the
blue
screw terminal on the Timer. It is
not used in a single-pole circuit.
Ground
Green wire
Black screw
Brass screw
Silver screw
Reference Wiring Diagram
Blue
120 V~
60 Hz
Blue
Neutral
Neutral
Brass
Brass
Black
Black
Silver
Green
Green
Ground
Wallbox
Accessory Switch
Wallbox
Live
For
Two-Location Control
wiring, follow
Sections A & B below
. One location will be replaced
with a Countdown Timer and the other with an Accessory Switch.
For
Three-Location Control
(or more) wiring, follow
Sections A, B & C
. One location will be
replaced with an Countdown Timer and the others with Accessory Switches.
Only one
Countdown Timer
can be used with up to 9 Accessory Switches.
Section A: Line side
Wiring the Accessory Switch on Line side:
• Connect the
green
ground wire on the Accessory
Switch to the
bare copper
or
green
ground wire
in the wallbox. (See Important Note 4.)
• Connect the tagged wire removed from the switch to
the
black
screw terminal on the Accessory Switch.
• Connect one of the remaining wires removed from the
switch to the
brass
screw terminal on the Accessory
Switch.
• Connect the remaining wire removed from the switch
(note wire color) to the
blue
screw terminal on the
Accessory Switch.
Ground
Tag
Green wire
Silver screw
Black screw
Brass screw
Blue screw
Section B: Load side
Wiring the Timer on Load side:
• Connect the
green
ground wire on the Countdown
Timer to the
bare copper
or
green
ground wire in
the wallbox. (See Important Note 4.)
• Connect the neutral wire in the wallbox to the
sil-
ver
screw terminal on the Countdown Timer.
• Connect the tagged wire removed from the switch to
the
brass
screw terminal on the Countdown Timer.
• Identify the color of the wire that was connected to
the
blue
screw terminal in
Section A.
Connect the
same color wire to the
blue
screw terminal on the
Countdown Timer.
• Connect the remaining wire removed from the switch
to the
black
screw terminal on the Timer.
Countdown Timer
Light or
Fan
Fixture(s)
A
Line side
B
Load side
Blue
120 V~
60 Hz
Neutral
Brass
Black
Silver
Green
Ground
Wallbox
Accessory Switch
Live
A
Line side
Blue
Neutral
Brass
Black
Green
Wallbox
Countdown Timer
Light or
Fan
Fixture(s)
B
Load side
Blue
Brass
Black
Green
Wallbox
Accessory Switch
C
4-Way
Ground
Ground
Ground
Blue
120 V~
60 Hz
Neutral
Neutral
Brass
Black
Silver
Green
Ground
Wallbox
Countdown Timer
Live
Light or
Fan
Fixture(s)
If the wires connected to the
black
and
brass
screws are reversed, the unit will
not operate. It may be necessary to swap
the connections to ensure that the
brass
screw is connected to the load.
Section C: 4-Way
Replace the 4-way switch(es):
Note:
4-way switches must be replaced with an
Accessory Switch.
• Connect the
green
ground wire on the Accessory
Switch to the
bare copper
or
green
ground wire
in the wallbox. (See Important Note 4.)
• Identify the color of the wires that were connected to
the
blue
screw terminals in
Sections A & B
. Connect
both
of the same color wires to the
blue
screw termi-
nal on the Accessory Switch (one wire to the screw
and the other to the push-in terminal.
• Connect one of the remaining wires removed from the
switch to the
black
screw terminal on the Accessory
Switch.
• Connect the remaining wire removed from the switch
to the
brass
screw terminal on the Accessory Switch.
Troubleshooting
Symptom
Load does not turn ON, but
LED on Timer is ON.
Load does not turn ON and
LED on Timer is OFF.
Load turns ON and Timer
works, but Accessory Switch
does not work.
Load does not remain ON,
LED glows dimly or blinks.
Possible Cause
•Light bulbs are burned out.
•Timer is not properly wired.
•Neutral wire is not connected.
•Load not properly installed.
•Fan not turned on at fixture.
•Timer is not properly wired, wires connected to brass and
black screw terminals may be reversed.
•Neutral wire is not connected
•Front Accessible Service Switch (
FASS) on Timer or any
Accessory Switch is pulled out to the OFF position.
•Breaker is OFF or tripped.
•Wire connected to the blue screw terminal on Timer is not
the same wire connected to the blue screw terminal on
Accessory Switch.
•Timer is not installed on the load side of the circuit.
•Blue screw terminal miswired to neutral wire or touching
ground.
The Countdown Timer (MA-T51MN) is rated for lighting and fan loads only.
Electronic Low Voltage
Fluorescent
General Purpose Fan
If a neutral wire is not present, contact
a licensed electrician for installation
.
If a neutral wire is not present in the box that
is last in the circuit before the load, contact a
licensed electrician for installation
.
If a neutral wire is not present in the box that
is last in the circuit before the load, contact a
licensed electrician for installation
.
Load Type
*Note: The maximum lamp wattage is determined by the efficiency of the transformer, with 70–85%
as typical. For actual transformer efficiency, contact either the fixture or transformer manufacturer.
The total VA rating of the transformer(s) shall not exceed the VA rating of the timer.
Ground
Tag
Green wire
Black screw
Brass screw
Blue screw
Accessory
Switch
Ground
Tag
Green wire
Black screw
Brass screw
Blue
screw
Accessory
Switch
ON
OFF
ON
OFF
ON
OFF
Turning ON power.
• Turn power ON at circuit breaker (or replace fuse).
7
7
Countdown
Timer
One Minute Indication:
When only one minute of time is remaining, the load will briefly
turn off and on to give an indication the timer is about to turn off.
Wire Connector:
Use to join one 14 AWG or 12 AWG ground
wire with one 18 AWG timer ground wire.
Twist wire
connector
tight.
Push-in Terminals: Insert wires fully.
NOTE:
Push-in terminals are for use with #14 AWG
solid
copper wire only. DO NOT use stranded or twisted wire.
Screw Terminals: Tighten securely.
Screw terminals are for use with #12 or #14 AWG
solid
copper wire only. DO NOT use stranded or twisted wire.
OR
Trim or strip wallbox wires to the length indicated
by the strip gauge on the back of the timer.
6
6
Mounting Control(s) to wallbox.
• Form wires carefully into wallbox, mount and align the control(s).
• Install the wallplate(s).
Caution:
Do not overtighten mounting screws.
Snap on
Claro
wallplate.
Start screws.
Align control and
tighten screws.
For new construction
go to step 5.
Timer must be installed on the load side of multi-location wiring.
