Installation Guide
Hold and until an indicator
light (IL) blinks on the dimmer.
AFTER INSTALLATION: Adjust dimming range (set low-end trim)
LED
+
Dimmer 120 V~ 60 Hz
Quick Install Guide
Install with
confidence
Use included diagrams
or visit our website for
step-by-step instructions.
®
WARNING: SHOCK HAZARD. May result in serious injury or death.
Turn off power at circuit breaker or fuse before installing.
1. Only use dimmer with permanently installed incandescent
or dimmable LED xtures. To avoid overheating and possible
damage to other equipment, do not use to control receptacles,
uorescent lighting xtures, low-voltage lighting xtures,
magnetic transformer loads, motor-driven appliances, or
transformer-supplied appliances.
2. Use switch to control any permanently installed lighting or fan
load. Switch is rated for fan and lighting loads up to 2.5 A.
3. Install in accordance with all national and local electrical codes.
4. When no “grounding means” exists in wallbox, the 2011
National Electrical CodeR (NECR) allows a control to be installed
as a replacement if 1) a nonmetallic, noncombustible faceplate
is used with non-metallic attachment screws or 2) the circuit
is protected by a ground fault circuit interrupter (GFCI). When
installing a control according to these methods, cap or remove
green wire before screwing control into wallbox and use an
appropriate faceplate such as Claro or Satin Colors series
wallplates by Lutron.
5. For indoor use only between 32 °F and 104 °F (0 °C and
40 °C).
6. Clean dimmers with a soft damp cloth only. Do not use any
chemical cleaners.
7. Install per Lutron’s torque guidelines at lutron.com/torque
Important Notes
Please read before installing
Ganging
Limited Warranty: www.lutron.com/warranty
©2022-2023 Lutron Electronics Co., Inc.
Lutron and LED+ are trademarks or registered trademarks of Lutron Electronics Co., Inc., in the U.S. and other countries.
The YouTube icon is a trademark of Google LLC.
ON
OFF
English
Receive an Extended Warranty: www.lutron.com/CLregistration
24 / 7 Support: 1.844.LUTRON1 (USA / Canada) +1.888.235.2910 (Mexico)
How-to videos
lutron.com/dualwiring
INSTALL WITH CONFIDENCE
lutron.com/dualwiring
VIDEO & STEP-BY-STEP INSTRUCVIDEO & STEP-BY-STEP INSTRUCTIONSTIONS
MACL-L3S25 / MACL-L3T251
Maximum load ratings
Remove side sections if
mounting 2 or more devices side
by side. No derating is required
when ganging this product.
Remove
Keep
Connect
On
60
45
30
15
5
10
Before Removing the Old Switch:
1. Place a single tag (electrical tape, for example) on the wire that
is connected to the Line / Hot side of the switch (the side with
the breakoff fin).
2. Place two tags on the wire from the load that you want to
connect to the timer or switch.
For advanced programming instructions,
please see Lutron Application Note #806
on www.lutron.com/DualFeatures
A
Use or to improve
lowest dimming level.
B
C
Press
T
to save and exit
low-end trim mode.
On
60
45
30
15
5
10
IL
On
60
45
30
15
5
10
OR
On
60
45
30
15
5
10
Bend back
and forth
Find the right LED
lutron.com/LEDfinder
On
60
45
30
15
5
10
Timer LEDs
• Orange LEDs indicate timer duration
or remaining time in minutes.
• Top LED labeled On has no time limit.
• Bottom LED blinks rapidly to indicate
one minute of time remaining.
Ground
(green or bare)
Yellow - Timer
or switch circuit
Red - Dimmer
circuit
Screw Terminal
Tags
Line / Hot
Tag
Green
MACL-L3T251 shown
MACL-L3T251 only
For more troubleshooting tips, please see www.lutron.com/support
Symptoms Probable cause and action
Product does not work
Verify a working load is connected to
the dimmer
Load flickers or
performs poorly
Verify bulb is on the compatible list
(see lutron.com/LEDfinder)
Adjust dimming range (see above)
Troubleshooting
Tag
Identify side with breakoff fin
T
T
T
LED
DEL
LFCA
CFL
AFC
Use or to
change timeout
OR
Dimmer
75 W
LED / CFL
300 W
Incand. / Hal.
Switch /
Timer
2.5 A
Fan
and / or light
Timer / Switch
Dimmer
P/N 0302118 REV A