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If a Single Switch Setup:

Connect one of the two wires from 

a. 

the wall to the black wire from the 
timer, using the twist connectors 
provided. 
Connect the other wire from the 

b. 

wall to the blue wire from the 
timer, using the twist connectors 
provided.
NOTE: The RED wire is not used 
in single-switch installations. Cap with a twist connector.
Connect the GREEN wire to the grounding screw in the box. If a 

c. 

plastic box, connect to ground as supplied.
Make sure all twist connectors are tight.

d. 

If a 3-Way Switch Setup:

NOTE: The distance between 
timer and remote switch must not 
exceed 100 feet.

 Locate the COMMON wire 

a. 

connected to first old switch. 
It might be attached to a dif-
ferent colored screw, or find markings on old switch.
Connect BLACK wire from timer to COMMON wire, using a twist 

b. 

connector.
Connect the other two wires from the old switch as follows: one 

c. 

to the BLUE wire and the other to the RED wire from the timer.
Connect the GREEN wire to the grounding screw in the box. If a 

d. 

plastic box, connect to ground as supplied.
Using diagram #1 below. Identify and remove wire “C” from the 

e. 

“Common” terminal of your existing remote switch. 

Using diagram # 2 below, remove and reconnect wires “B”  and 

f. 

“C” to the “Common” terminal of your remote switch, using a 
jumper wire, if necessary. Follow diagram # 3 below, if using a 
new single-pole remote switch. 

NOTE: For new construction or to replace a dimmer switch, 
a lighted switch, or a 3-way switch without screw terminals, a 
single-pole switch can be used at the remote location, as shown.
NOTE: If the building’s wiring colors don’t allow you to tell wire 
“A” from “B,” just pick one of the two wires and connect as if it is 
wire “B.” After the installation is complete, if the controlled light 
or device will not turn on properly, simply reverse wires “A” and 
“B.” See Steps 

J

 and 

K

 for how to check.

Tuck wires into the timer wall box leaving room for the timer.

g. 

Using screws provided, mount the timer into the wall box, then 

h. 

install the wall plate.

Digital Auto Shut-Off

 Timer

Turn off power at the service panel by REMOVING FUSE or 

1. 

TURNING THE CIRCUIT BREAKER OFF.
Remove the existing wall switch.

2. 

Trim building wires to 7/16” as shown.

3. 

Resistive (

• 

heater

) 20 Amp, 120-277 VAC

Tungsten (

• 

incandescent

) 15 Amp @ 120 VAC, 6 Amp @ 208-277 VAC

Ballast (

• 

fluorescent

) 16 Amp @ 120-277 VAC

Motors 1 H.P. @ 120 VAC, 2 H.P. @ 240 VAC

• 

DC Loads 4 Amp @ 12 VDC, 2 Amp @ 28 VDC

• 

Installation and User Instructions

MODEL EI400 Series

Before installing the shut-off timer into the wall, make sure the sup-
plied battery is installed and working, and the device has been reset. 

Open the access door to reveal the battery tray, located below 

1. 

the ON/OFF keypad.
If there is a pull tab at the battery tray, remove the tab to connect 

2. 

the installed battery. Make sure battery tray is pushed fully into 
place. Proceed to Step 6.
If the battery was supplied loose, use a flat screwdriver to pry 

3. 

loose the battery tray.
Place the supplied “CR2” battery into the tray, observing 

4. 

+

 and 

 

markings on tray.
Replace the battery tray into the timer.

5. 

The display will initialize itself then display “OFF” with the dark 

6. 

light bulb icon. The timer will “beep”.
Press the 

7. 

ON/OFF

 button. The shut-off timer should “click.”

NOTE:

 

There is an intentional 1-second delay, after pressing 

the 

ON/OFF 

button, before the timer clicks OFF. 

If the display is blank, the battery may be dead. Replace the bat-

8. 

tery before installing the timer. 

BLACK WIRE

BLUE WIRE

RED WIRE

(capped, not connected)

RED WIRE

BLUE WIRE

BLACK WIRE

WIRE FROM

“COMMON” OF

OLD SWITCH

7/16”

1 – 

Before Installing,

 Check the Battery

3 – Install the Timer into the Wall

Ratings

Electrical shock hazard. Risk of injury or death. Remove electrical power 

• 

at service panel before installing.
Risk of fire and burns. Do not recharge, disassemble, heat above 100° C, 

• 

crush, or incinerate the lithium battery. Keep battery out of reach of 
children. Replace only with Panasonic Type CR2 or equivalent CR2 battery 
approved by Underwriters Laboratories (UL). Use of other battery may pres-
ent risk of fire or explosion upon disposal of the battery.
Risk of fire. Do not use timer to control devices that could have dangerous 

• 

consequences due to inaccurate timing, such as sun lamps, sauna, heat-
ers, crock pots, etc.

WARNING

Follow local electrical codes during installation.

• 

Risk of timer damage due to leakage if weak battery is not replaced promptly.

• 

Dispose of used battery promptly per local regulations.

• 

NOTICE

DIAGRAM 1:

TYPICAL 

EXISTING 

2-SWITCH

SETUP

LOAD

NEUTRAL

3-WAY 

MAIN SWITCH

WIRE “A”

“COMMON” TERMINAL

LINE

3-WAY 

REMOTE SWITCH

WIRE “B”

WIRE “C”

DIAGRAM 2:

2-SWITCH SETUP,

TIMER INSTALL

RE-USING EXISTING

REMOTE 3-WAY SWITCH

LOAD

NEUTRAL

WIRE “A”

“COMMON” TERMINAL

LINE

3-WAY 

REMOTE SWITCH

WIRE “B”

NOT USED

BLACK

TIMER

BLUE

RED

WIRE “C”

JUMPER

DIAGRAM 3:

2-SWITCH SETUP,

TIMER INSTALL USING 

NEW SINGLE-POLE 

REMOTE SWITCH

LOAD

NEUTRAL

WIRE “A”

LINE

SINGLE-POLE 

REMOTE SWITCH

WIRE “B”

BLACK

TIMER

BLUE

RED

WIRE “C”

JUMPER

Before installing, reset the timer to clear out any settings. 

Hold down 

1. 

ON/OFF

.

Using a pen or paper clip, press and release the 

2. 

RESET

 button, 

which is the small round button to the lower right of the 

+

 button. 

The display will initialize itself and the timer will “beep”. 
When the screen displays “INIT”, release the 

3. 

ON/OFF 

button. The 

timer will display “OFF” with the dark light bulb icon.

2 – 

Before Installing,

 Reset the Timer

LIMITED FIVE-YEAR WARRANTY

If within one (5) years from the date of purchase, this product fails due to a defect in material or workmanship, Intermatic Incorporated will repair 

or replace it, at its sole option, free of charge. This warranty is extended to the original household purchaser only and is not transferable. This war-

ranty does not apply to: (a) damage to units caused by accident, dropping or abuse in handling, acts of God or any negligent use; (b) units which 

have been subject to unauthorized repair, opened, taken apart or otherwise modified; (c) units not used in accordance with instructions; (d) dam-

ages exceeding the cost of the product; (e) sealed lamps and/or lamp bulbs, LED’s and batteries; (f) the finish on any portion of the product, such as 

surface and/or weathering, as this is considered normal wear and tear; (g) transit damage, initial installation costs, removal costs, or reinstallation 

costs.
INTERMATIC INCORPORATED WILL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. SOME STATES DO NOT ALLOW THE 

EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO 

YOU. THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS OR IMPLIED WARRANTIES. ALL IMPLIED WARRANTIES, INCLUDING THE WARRANTY 

OF MERCHANTABILITY AND THE WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY MODIFIED TO EXIST ONLY AS CON-

TAINED IN THIS LIMITED WARRANTY, AND SHALL BE OF THE SAME DURATION AS THE WARRANTY PERIOD STATED ABOVE. SOME STATES DO 

NOT ALLOW LIMITATIONS ON THE DURATION OF AN IMPLIED WARRANTY, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
This warranty service is available by either (a) returning the product to the dealer from whom the unit was purchased, or (b) mailing the product, 

along with proof of purchase, postage prepaid to the authorized service center listed below. This warranty is made by: Intermatic Incorporated/

After Sales Service/7777 Winn Rd., Spring Grove, Illinois 60081-9698/815-675-7000 http://www.intermatic.com Please be sure to wrap the product 

securely to avoid shipping damage.

INTERMATIC, INC., SPRING GROVE, IL 60081-9698

158EI12562

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