How to program and install ST01C Intermatic timer

Waterheatertimer.org
is a self-help website

2011
http://waterheatertimer.org/ST01C-program.html#wire

ST01C and Ei600

How to program & install ST01C
Intermatic timer

Simplified steps for programming ST01C and Ei600 timer

ST01C and Ei600

See ST01C Manual
ST01C EZ set-up manual
Ei600 Manual
ST01C sell sheet with model numbers
Ei600 sell sheet with model numbers
Ei600 is heavy-duty, 5-year warranty version of ST01C 1-year warranty.
Manual has troubleshooting section.
Read more about troubleshoot and battery at bottom of page.
ST01c at Amazon

CR2 battery
Illustration at page bottom
Reset timer after battery change.

See all Intermatic in-wall timers

Notes:
> ST01C, Ei600 programmable Timers will not operate circuits located more than 100’ from timer
> Install 'Panasonic Type' CR2 battery with correct + and – markings/ shown at bottom of page
> 1 minute to swap battery before time and date disappear; all other programs remain
> Removing battery does not clear existing programs, just time and date.
> Power outage should not affect programming or time and date, unless battery is low or timer defective.

Intermatic ST01C and Ei600 are CFL ready// will work with tungsten (incandewscent) CFL, LED, halogen, fluorescent, and motor loads up to 1 Horsepower.
(Intermatic Ej500 and EJ351 incandescent lights only)
Inermatic Ratings: Clock operated enclosed switches, solid state outlet box mounted Models ST01C, ST01C70, ST01AC, ST01AC70, ST01ACL, EI400C, EI400LAC, EI400WC, EI600C, EI600LAC, EI600WC, rated 15A tungsten, 120V ac, 6A, 208-277V ac; DC Loads 4A 12V dc, 2A 28V dc; Motors 1HP 120VAC, 2HP 240V ac, Ballast 16A 120V ac, 208-277V ac; Resistive 20A 120-277Vac.

CFL Ready

Programming starts here

See larger

1) Reset timer: Clear existing programs (from Section 4 of manual)
If you are having problem, RESET the timer
-Hold down ON-OFF
-Use paper clip, press and release RESET which is small round button to lower right of + button
-Keep holding ON-OFF until screen displays INIT, release ON-OFF button
-Wait until screen shows “12 am” in MANual mode
ST01C timer has 1 year limited warranty. Ei600 timer has 5 year limited warranty Warranty claim

ST01C Larger
LCD display does not light up. Image is photoshopped.

Daylight savings time

Time Zone Map

2) Set Date & Time (From Section 5 of manual)

-Press MODE until screen displays SET UP
-Press ON/OFF to display HOUR
-Press +/- until correct hour and AM/PM show
-Press ON/OFF to display MIN minutes
-Press +/- until correct minute shows
-Press ON/OFF to display Year
-Press +/- until correct year shows
-Press ON/OFF to display Month
-Press +/- until correct month shows
-Press ON/OFF to display Day
-Press +/- until correct day shows
-Press ON/OFF to display DST (daylight savings)
-Press +/- until display shows AUTO for automatic daylight savings adjustment
- OR Press +/- until display shows MANual (if your areas has no daylight savings)
-Press ON/OFF to display Time Zone: select NoRTH CENTral or SOUth using map on left
-Press ON/OFF to display Dawn-Dusk (to skip Dawn-Dusk press ON/OFF until set-up shows on display)
Since dawn-and-dusk times vary slightly depending on location, you can set exact dawn to dusk time according to times shown in local newspaper.
-Press ON/OFF and the Hour starts flashing. The word DAWN shows.
-Press + until correct DAWN hour shows
- Press ON/OFF and minutes flash
-Press + until correct DAWN minute shows
-Press ON/OFF and the Hour starts flashing. The word DUSK shows.
-Press + until correct DUSK hour shows
- Press ON/OFF and minutes flash
-Press + until correct DUSK minute shows
- Press ON/OFF again and timer loops back and SET UP shows
-Press MODE button to exit SET UP and save settings

Program 1 is ON
Program 2 is OFF
Program 3 is ON
Program 4 is OFF

3) Overview of programming
-Timer has 40 programs >> program1 thru program40
Step1 is to set Program1 ON with hour, minute, day.
Step2 is to set Program2 OFF with hour, minute, day
If you have problem, RESET timer by holding ON-OFF button while pressing reset button

4) Set ON-OFF programs (From Section 6 of manual)
Instructions below show how to set Program1 ON and Program2 OFF: repeat sequence to set program3 ON program4 OFF etc

	Step1: How to set Program1 ON (this is for both specific ON-OFF times & Dawn-Dusk) ←Press Mode button until PGM is flashing in display This example shows current time has been set at 12:30pm -Notice light bulb in upper left corner of display. -When light bulb is dark, that is ON time

	-Press Mode button until PGM starts flashing ←Press ON/OFF and 01 starts flashing for Program1
		DAWN to DUSK programming
	Here's the tricky part >> the manual is unclear at this point ←Press ON/OFF until screen looks like image on left For dawn to dusk continue using instructions on right --> For programming specific times, continue below ↓ Then press +/- button until screen looks like image below, and 12:00 is flashing	To set Dawn-Dusk operation. 1) Press + to display DUSK or DAWN for program 1 ON
	Now timer is ready for program1 ON time
	-Press ON-OFF and 12: starts flashing -Press +/- until correct Hour with AM PM for program1 ON -Press ON-OFF and :00 starts flashing -Press +/- until correct minute shows for program1 ON -Press ON-OFF and and ALL starts flashing (ALL is for all days of week Mo through Su) -Press +/- until correct days show for program1 ON	2) Press ON/OFF to display days you want Dawn-Dusk to operate. For example ALL is all days of week 3) Press ON/OFF and display will show SAVE
		4) Program loops back to to step 1 above. Display shows DUSK 02 Repeat steps 1-2-3 shown above to select program 2 OFF
	-Press ON-OFF to SAVE > the word SAVE appears for a moment

	Step 2) Program2 OFF You just saved Program1 -Press +/- to go to Program2 ←Screen looks like image on left

	←Press ON-OFF until screen looks like image on left. Notice that light bulb icon in upper left corner has changed from dark to light > this is OFF ↓ Then press +/- button until screen looks like image below	When finished, press MODE to exit programming and automatically save settings
	Now timer is ready for program2 OFF time
	-Press ON-OFF and 12: starts flashing -Press +/- until correct Hour with AM PM for program2 OFF -Press ON-OFF and :00 starts flashing -Press +/- until correct minute shows for program2 OFF -Press ON-OFF and and ALL starts flashing (ALL is for all days of week Mo through Su) -Press +/- until correct days show for program2 OFF NOTE: be sure to select same days for ON and OFF programs

	-Press ON-OFF to SAVE > the word SAVE appears for a moment Program1 ON and Program2 OFF are set for specific times

When finished, press MODE to exit programming and automatically save settings

To avoid problems, make sure each ON time has OFF time. Make sure programs do not conflict: for example is Program 1 ON is 8:03 am M-F all-days-of-week, but Program 2 OFF is 10:03 am T Tuesday (instead of M-F all-days-of-week) then timer will not operate as expected. If the On-OFF button turns lights on-and-off with a click-sound each time, then timer is wired correctly. If timer is wired correctly, but timer schedule will not work as programmed, then review programs starting with Step 4 above.

Days of the week include:
Individual days Mo thru Su
Weekdays M-F
Weekends WKD
ALL means all 7 days of week

Chart for setting timer

Example for water heater timer
Program 1 ON .... 5:30am M-F water heater ON for 1/2 hours Monday-Friday mornings
Program 2 OFF .... 6 pm M-F

Program 3 ON .... 7pm M-F water heater ON for 1-1/2 hours Monday-Friday evenings
Program 4 OFF.... 8:30pm M-F

Program 3 ON .... 7:30am WKD water heater ON for 1/2 hours weekend morning
Program 4 OFF ... 8am WKD

Program 5 ON .... 8pm WKD water heater ON for 1-1/2 hours weekend evenings
Program 6 OFF.... 9:30pm WKD

Program 7 ON .... 4:30pm ALL water heater ON all days for 1/2 hour at dinner time
Program 8 OFF... 5:00 pm ALL

NOTE: Timer automatically skips any conflicting ON event

Operate ST01C manual override by pushing-in door that covers timer buttons

Back to programmable timers
Back to all timers

How to wire ST01C & Ei600 water heater timer

How to install ST01C & Ei600 to control electric water heater

How to wire ST01C &Ei600 & EJ500 & Ei400
to control lights, fan, motor
Max distance 100', wiring cannot be underground.

Single pole switch wiring/ See diagrams below for specific details

How to wire ST01C & EJ500 and Ei600 This illustration is for replacing ordinary light switch that has 2 wires.
Red wire is only used in 3-way circuit ... if your lights click on-and-off after installing ST01C, you connected red wire where blue wire should go, so change them. Put wire nut over end of red wire so it is capped off.
If you connect Red and Blue wires together, the programming works in reverse, and 'off' becomes 'on' and 'on' becomes 'off'

1) Black wire from timer connects to Hot wire from breaker box
2) Blue wire from timer connects to Load (lights, fan, motor)

3) How to install.
Single-pole switch has two wires. Connect one wire to Timer Black and one wire to Timer Blue. If timer does not work after installation, then swap black and blue wires.

How to wire ST01C single pole/ Applies to ST01C, Ei600, EJ500, and Ei400 timers

		If box does not have Neutral or ground wire. Use Intermatic ST01C ST01C is battery operated and does not need either Neutral or ground wires to operate light Connect Black to Hot wire from breaker Connect Blue to wire going to Load Cap off Red wire Connect green to ground wire if available If timer does not work after power is turned ON, try reversing Timer Black and Timer Blue wires

		If box has neutral ST01C is battery operated and does not need either Neutral or ground wires to operate light Connect Black to Hot wire from breaker Connect Blue to wire going to Load Cap off Red wire Connect green to ground wire if available If timer does not work after power is turned ON, try reversing Timer Black and Timer Blue wires

		ST01C rated for incandescent, CFL, LED, halogen, motors, etc.

How to wire ST01C for 3-way/ Applies to ST01C, Ei600, EJ500, and Ei400 timers

Typical 3-way switch wiring

Common screw is dark-colored
Traveler-screws are brass colored
Line side connects to line from breaker
Load side connects to light

12-2 wire

Common screw is usually dark.
Timer replaces one 3-way switch
Other 3-way must be rewired

Timer replaces one 3-way switch
Other 3-way must be rewired

Identify wire that connects to common screw
Usually the dark-colored screw
1) Take photo of wires before disconnecting old switch.
2) Note which wire connects to dark-colored screw
3) If screws are not color-coded: Look on back of old switch to see which screw is marked common, and then mark that wire as common.

Common wire will connect to Timer Black wire, or Timer Blue wire.

Larger image

With timer on Load side: if electricity goes OFF, then timer will start to click on-off using the battery. If this happens, click the 3-way switch up or down. Afterwards, the timer will no longer click on-off.

If power remains off for a while, the current time must be re-programmed. However the scheduled programs are not affected by power outage and remain in memory forever until timer is manually reset.

ST01C timer wired for 3-way

Timer on Load side
Blue wire connects to wire that was connected to common screw
Timer black wire must always be connected to Hot
Blue wire must always go to Load
When power is applied to red wire, the timer programming reverses.

Remember, the remaining 3-way switch has to be rewired as if it was ordinary on-off switch using common screw and one traveller screw.
When the switch is turned ON-OFF, it reverses timer programming.

Actual test wiring

Timer Black always goes to Hot
Timer Blue always goes to Load

When power is applied to Timer Red wire, the timer program reverses

Larger image

ST01C timer wired for 3-way

Timer on Line side
Black wire connects to screw that was connected to common screw
Timer black wire must always be connected to Hot
Blue wire must always go to Load
When power is applied to red wire, the timer programming reverses.

Remember, the remaining 3-way switch has to be rewired as if it was ordinary on-off switch using common screw and one traveller screw.
When the switch is turned ON-OFF, it reverses timer programming.

Timer on Line side, same as illustration above
Timer Black wire MUST be connected to Hot.
Timer Blue wire MUST be connected to Load (light).
When power is applied to red wire, the timer programming reverses.

The blue wire must always go to Load, and the red wire is for reversing timer program.
So the only purpose of the 2nd 3-way switch is to reverse and re-reverse timer program.

Be sure to use dark-colored 'common' screw on 2nd 3-way switch as shown, and then use either of the other screws on the 2nd 3-way swtich.
Aube timer can be used to replace either 3-way switch

Identify wires inside 3-way switch box

3-way switch box will have minimum 3 wires.
Most 3-way boxes will have 5 wires.
Other 3-way boxes can have 7 wires, or more depending on the number of junctions connected inside the box.

Example shows typical 3-way switch box.
Two cables enter the box.
One cable has 3 wires plus ground
Second cable has 2 wires plus ground

Find HOT wire

Each 120Volt electrical box inside residential home has 1 black hot wire > except for 3-way and 4-way switches, and 240volt outlets fround on clothes dryer etc.

To find the hot wire:
Take photo image so wires can be put back.

Remove both 3 ways switches.
Mark each wire that connects to common screw on 3-way switch. Hot wire will always connect to common screw.

Separate all wires for testing.
Leave ground wires together
Tape tester leads to wood sticks for safety.
Turn power ON. Keep hands away. Stand on dry boards.
Test each wire inside box to bare ground wire.
Tester will light up on one wire.
This is the Hot wire.

Next test Hot wire to all other wires inside box except bare ground.
Tester will light up on Neutral.

More Residential wiring

Ordinary 3 way circuit with 2 switches.
Ground wire is not shown.
3-way switch has 2 brass-colored screws and 1 dark screw
Larger image

Single-pole circuit
Ground wire is not shown.
Single-pole switch has 2 brass-colored screws
Larger image

Typical 3-way switching, with 4-way switch circuit

4-way switch has 2 dark-colored screws and 2 brass-colored screws.

ST01C or EJ500 inserted into 3-way/4-way circuit

ST01C/EJ500 cannot replace 4-way switch

Notice the timer replaces one 3-way switch, while the 4-way switch is replaced with ordinary 3-way switch.

Quick note. Manual has troubleshooting section. See ST01C Manual
The important thing to remember is that this timer will keep programming inside memory indefinitely until you use reset button. If timer is flashing 12:00 after replacing battery, then just set current time and then your old programs are still there.
As last resort for malfunctioning timer, hold down ON-OFF button and press and release reset button. Keep holding ON-OFF button until INIT flashes on display. Release ON-OFF and 12:00 will start flashing. If resetting timer does not restore functionality, then timer has gone bad. ST01C and battery operated timers do not require electricity for display to show. This timer has 1 year limited warranty from Intermatic. Warranty claim

Battery cannot be exposed to freezing temps longer than 20 days

Change CR2 battery on ST01C

If ST01C or EJ500 do not function correctly after battery change, then re-set timer and see if 12:00 is flashing. Then reprogram timer.

Reset instructions

ST01C uses one CR2 battery
When exposed to freezing temperatures, battery will last 20 days.

See Larger
See EJ500 Manual

EJ500 takes two LR44 'coin' batteries

See Larger

Other timers that work with 3-way switch
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UPM ETW193 & ETW353 timers
Brinks 46-1022
Leviton LPV24
GE countdown

EJ500 takes two LR44/SR44 batteries

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