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TMMW25 Instruction Insert  Sheet-FRONT

INSERT SIZE: 7" x 8.5" (2 per 8.5" x 14" sheet)         

COLORS: Use Pantone Color Chip(s) for Color Matching    

THIS PRINT IS FOR REFERENCE ONLY AND IS 
NOT INTENDED FOR COLOR MATCHING 

BLACK

DIE LINE

TMMW25

Mechanical Wall Switch Timer Instructions

•  24 hour on/off timer. Up to 24 ON and 24 OFF settings in a 24 hour period.
•  1 pin = 30 minutes
•  Easy to install in a standard 2-1/2 inch vertically installed junction box 

replacing a standard single pole single throw wall switch.

INSTALLATION

1. Turn off power to the branch circuit at the circuit breaker.
2. Remove the existing switch.
3. Using the wire nuts provided connect the wires of the timer and wall 

box as instructed below. (See wiring schematic)

 

3.1  Connect the HOT/Live of the branch circuit (Black) to the black 

wire from the timer.

 

3.2  Connect the Neutral wires of the branch circuit and load from 

the box (white) to the white wire from the timer.

 

3.3  Connect the HOT/Live wire of the load to the red wire from the 

timer.

 

3.4  Ground wire is not required for this timer because the cover is 

non conductive.

Note: 

Be sure all wire nut connections are secure.

4.  Tuck the wires into the wall box leaving room for the timer
5.  Using the screws provided, mount the timer to the wall box being 

careful not to crush any wires.

Timer lock and switch insert

  The TMMW25 is provided with 2 inserts to allow the timer to be locked 

in timer mode or used with “ON/OFF/TIMER” switch. 

  The switch cover allows the switch to be moved to select the “TIMER“, 

“OFF” or “ON” modes.  The TIMER LOCK insert locks the switch in the 
“TIMER” mode and will not allow the switch to be changed without 
replacing the insert.

  Select the desired insert and place it in the cover plate before attaching 

to the installed timer.

Timer operation:

Setting ON / OFF Periods

  This timer can be programmed with up to 24 on and 24 off settings in 

a twenty-four hour time period. There are 2 pins (30 Minutes each) 
associated with each hour in the day. Using your finger, a pen, or a 
screwdriver, pull up (OFF) all pins corresponding to the times you want 
the timer to turn power off to the load. For desired “ON” times, make 
sure the pins are pushed down.  The pins are typically set to the “ON” 
position when you open the package.

Setting time of day

  Turn outer dial clockwise until triangular pointer is lined up with the 

present time of day. Be sure switch is set to “TIMER”. 
Caution: Turning dial counter clockwise will damage the unit causing it 
to stop working.

Selecting Mode:  ON / OFF / TIMER

  If you want the timer to run the ON / OFF  programs as you set them in 

previous section, you must select “TIMER” mode on the switch below 
the dial.  Programmed ON / OFF times can be interrupted by using the 
“ON /OFF/ TIMER“ switch located just below the dial.  After placing the 
switch in the OFF or ON Position the controlled device will stay OFF or 
ON untiI the switch is manually changed. If the “Timer Lock” is 
installed, the switch is forced into the TIMER mode and cannot be 
changed until the lock is removed.  This feature is best utilized in public 
locations where you don’t want someone overriding the timer settings 
and turning a device on/off for extended periods of time.

Caution:

For indoor Use only
Do not use with any appliance that exceeds the capacity of the 
timer.
Fan heaters and heaters with exposed elements should not be 
connected to timers.

1 Year Limited Warranty

AmerTac warrants to the original 
purchaser that this product will be 
free from defects in materials and 
workmanship for a period of 1 year 
from the date of purchase. Additional 
details are available at 
www.amertac.com. 

PROP. 65 

WARNING: 

This product contains 

chemicals known to the State of 
California to cause cancer, birth 
defects or other reproductive harm.

Questions, ¿Preguntas?, Questions?  201-661-9945

©2013 AmerTac™
Saddle River Executive Centre
One Route 17 South, Saddle River, NJ 07458
www.amertac.com
Made in China/Fabriqué en Chine/ Hecho en China
I13-0004-A

Black

Red

Black

White

White

Light

Timer

120 AC
Power In

White

White

Timer is non metal construction so no ground 
wire is required for timer housing

Typical wiring schematic

Wallbox

Boîtier

Caja de pared

Timer

Minuterie

Temporizador

Front Cover

Couvercle avant

Cubierta frontal

Switch cover (optional)

Couvercle de l’interrupteur 

(optionnel)

Cubierta del interruptor 

(opcional)

Use one or the other

Utiliser l’un ou l’autre

Utilice uno de los dos

Timer Lock

(optional)

Dispositif de 

verrouillage 

de la minuterie 

(optionnel)

Bloqueo del 

temporizador

(opcional)

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