Question about Intermatic T7401B - 7-Day Dial Time Switch - NEMA 1 Steel Case - 4PST - 40

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I have a T7401 Intermatic Timer 24 hour 7 days a week. I have it set to turn on lights a 6:00am and go off at 10:00am. everyday. The problem is it comes on a 5:00am and goes off at 7:00am. Can you help with this problem ? Do I have the right trippers ? As far as I know, Nothing has been changed as far as any kind of part. The time is set to the correct time of day.

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Make sure that your switch togs are snug...they'll slip on the wheel.
Also if the timer is failing, you can buy a replacement timer unit for this .
K

Posted on Jun 19, 2009

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Posted on Jan 02, 2017

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I need a light timer that I can set to be on for 50 minutes and off for 10 minutes, and repeat this over a 24 hour period.


Another timer that can be set this way is the Intermatic ET9000 series commercial programmable 365 day timer, which accepts any voltage, and rated 20-30 amp, and has 4000 set points for programming.
http://waterheatertimer.org/pdf/Intermatic-ET90000-Series-Spec.pdf

Another timer series might be useful, and can be programmed by computer and has small relays that install on a card that is installed in computer like installing a modem card, and can interface with zigbee wireless:
http://www.francisav.com/relay_controllers.htm

Nov 28, 2012 | Woods Indoor 24 Hour Night Light Timer...

1 Answer

The auto mode isn't working on my zilla digital 24-7 power center, when on auto mode no lights come on?


Copy following link to identify timer:
http://waterheatertimer.org/GE-timers-and-manuals.html#zilla
Is this a new timer??? Or old timer that stopped working?
Replace battery.
Press reset button to clear all memory traces before programming.
Check programming for overlaps and mismatched day(s) of operation.
Test outlet for correct polarity and grounding using circuit analyzer.
Make sure light bulb is turned ON. Timers do not reach out and rotate on-off switch.
Make sure outlet has at least 80% rated voltage shown on load label. For example 115 volts x 80% = 92 volts

About your specific programming needs:
Zilla selects 12 o'clock as changeover time between am-pm.
So if you want 8:02 to 7:59 operation, then that is under the 12 hours, but it crosses the 12 o'clock am-pm changeover.
Workaround: Shorten your times to less than 12 hours just like you have done.
But set current time differently so 8-8 falls under either am or pm, but does not cross am-pm. The timer does not actually know what the current time is, so simply fudge by amount needed.

Nov 18, 2012 | RTO Zilla 24/7 Digital Timer Power Center

1 Answer

Lights come on but don't stay on even though the tabs are set for it to stay on say from 4-12 it will go off at 7:30. Someone got thier hands on this before i did---could the tabs have been broken if...


GM40 is commercial-grade electronic time piece with FM1 analog timer dial.
I bought a used GM40 once and the electronics were bad, so if this is a used timer, it might not function as expected.

I don't think the tabs/pins are broken. FM1 timer module is heavy duty.
Turning the dial clockwise does not damage timer. That's how you set current time and test timer.
Rotating dial counterclockwise is not possible without breaking the timer.
http://waterheatertimer.org/How-to-set-timers.html
http://waterheatertimer.org/pdf/Intermatic-Grasslin-gm40.pdf

FM1 analog timer module can be replaced if timer stopped working.
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#FM1

If certain pins/tabs are broken, you might be able to work around problem by offsetting current time by 6 hours or 12 hours. Or you can move wires from NO to NC terminals and see if the relays are causing a problem.

To set FM1 timer, the pins are pushed outward or inward.
For example to turn on Load for 1 hour, then 4 consecutive pins are moved.
To turn on Load for 3 hours, then 12 consecutive pins are moved.
To test if pins need to be inward or outward, set some pins and then manually rotate timer dial clockwise and watch when the Load turns on-off.

Jun 19, 2011 | Intermatic GM40 - 24 Hour/7-Day Dial...

1 Answer

What is a minimum timer setup


Question is not clear, timer is not identified.
Add a comment with in-focus photo of timer posted on flickr.

Minimum on-off time for digital timers is usually 1 minute.

Minimum on-off time for plug-in-type 24-hour analog timers is 1/4 hour or 1/2 hour depending on width of tripper-pin-segment.
Minimum on-off time for plug-in-type 7-day analog timer is usually 3 hours.
Plug-in vacation timers are set for random on-off and cannot be set.
Minimum on-off time for box timers with 24 hour dial and wide tripper is 1 to 1-1/2 hours
Minimum on-off time for box timers with 24 hour dial and narrow tripper is 1/4 hour.
Minimum on-off time for box timers with 7-day dial is usually 3 hours

Open following link for information how to set analog timers
http://waterheatertimer.org/How-to-set-timers.html

Jun 12, 2011 | Intermatic 10 Amp Mechanical Indoor Timer

1 Answer

Looking for a timer to turn a 120volt 2amp water pump on for 1min 2 times aday that will last for more than 3 years please help


1) You need 120V timer to control 2 amp water pump.
V x A = watts so 120V x 2amp = 240 watt
754 watts per HP divided by 240W = 1/3 HP horsepower.

2) To get 1 minute time periods, you need electronic timer.
Most electronic timers have minimum 1 minute set time.
Same schedule each day, you can use 356-day, 7-day or 24-hour electronic timer.

3) To have electronic timer last longer than 3 years you need a clean circuit and expensive timer.
Use circuit analyzer to check circuit. Hire electrician to check circuit and replace pump if necessary to make sure timer will last as long as possible.

4) Intermatic ET70115C should last for many years. Battery is replaced every 8 years.
http://www.intermatic.com/products/timers/electronic%20time%20switches/next%20generation%20time%20switches.aspx
ET70115C $379
http://www.1000bulbs.com/product/3391/ELEC-ET70115C.html

5) You posted under EH10 water heater timer, which is inexpensive water heater timer rated for 1HP. You can't expect inexpensive timer to last as long when using a motor, although 1/3 HP is lightweight motor.

6) You can buy five EH10's for same price as one ET70115C.

7) List of ordinary electronic timers, each with slightly different features
Intermatic EH10 $73
http://www.amazon.com/Intermatic-EH10-Electronic-Heater-Indoor/dp/B000GHIPOA
Intermatic ET1105C $96
http://www.amazon.com/Intermatic-ET1105C-Hour-Electronic-Switch/dp/B002X1FYWI
Intermatic ET101 $101
http://www.westsidewholesale.com/24-hour-programmable-electronic-timer.html
Tork EW100B $177
http://www.1000bulbs.com/product/8434/TORK-EW101B.html
Sylvania SA300 $72
http://www.amazon.com/Sylvania-SA300-120-Volt-Single-Pole-Industrial/dp/B000KKNEO4

8) See wiring diagrams and manuals for some of the timers listed above:
http://waterheatertimer.org/Boxtype.html

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 31, 2011 | Intermatic 7 Day Electronic Timer Eh10...

1 Answer

Do not know how to set timer DT300 for Lights


Hi

Programming:
Set present time
Then set ON time for program 1
Set OFF time for program 1
Then set ON time for program 2
Set OFF time for program 2
Most timers will not function if there is a conflict in programming > for example Program 1 says ON at 6 and OFF at 7 and Program 2 says opposite or has overlapping times
When events are set, press SET once > this will put timer in RUN mode

If manual override works, and you set programming correctly, but timer does not carry out instructions, I guess the timer is no good.

Intermatic has 24 hour timers with 2 on-off per day
http://www.intermatic.com/products/timers/consumer%20indoor%20timers/lamp%20%20appliance%20timers.aspx
Intermatic has 7-day digital timers (all digital timers today are 7 day where you select the day that each program works)
http://www.intermatic.com/products/timers/consumer%20indoor%20timers/digital%20timers.aspx


Thanks.

Dec 27, 2010 | Audio Players & Recorders

1 Answer

How do I set timer


manual for HB51RC
http://www.intermatic.com/%7E/media/files/intermatic/products/instructions/timers/hb61rc%20-%20english.ashx
See timer at Amazon
http://www.amazon.com/Intermatic-HB61RC-Digital-Outdoor-Control/dp/B00004W4X5


Plug timer into outlet
Plug lights into timer
Timer turns on automatically at dusk + override lets timer run during daylight hours
Timing cycle repeats each 24 hours
Use selector button to set timer
Timer must be reset after power outage or after unplugging timer.
Rotate selector button and choose one of following

F > Lights are OFF
O > Constant ON
1 through 9 > timer turns ON at dusk and turns OFF 1 to 9 hours later
d > timer turns ON at dusk and OFF at Dawn
1. through 9. > timer turns ON immediately and then turns OFF 1 to 9 hours later
Maximum wattage 1000
50 mini-bulb-string of Christmas lights is 25 watts

Dec 14, 2010 | Intermatic Outdoor Timer/Photo Control...

3 Answers

I have a HB88RC Intermatic 7 day / 7 event timer. I have followed the "easy set instructions" I have program 1 set to turn on X-mas lights at 4:30 PM and go off at 11:30 PM. For all seven...


Just program it as noted previously and put the timer in Auto. Set the clock to 1 min BEFORE your earliest timer program is set to come on. When the clock hits the correct time, it will turn on. Then set the clock to the correct time and you're golden.

Dec 03, 2010 | Intermatic HB88RC - 7-Day Programmable...

1 Answer

I want a programmable timer that can, eg, switch on a single phase electric motor for 10 seconds every hour. It may be 9 secs or 11 secs.


You need a programmable interval timer.

http://waterheatertimer.org/Intermatic-timers-and-manuals.html#ET70
Intermatic and Tork make digital timers with interval settings that can be set for specific short-duration with 1 minute minimum.
(Or set to pulse bell ringing with 1-127 seconds.
10 minutes is 600 seconds)
For example ET70115 single-channel timer.
The timer would be set for 24-hour operation, and then programmed for Pulse, and then set timer with 24 programs, with 1 program for each hour.

Mechanical cycle timers from Intermatic:
http://waterheatertimer.org/Intermatic-timers-and-manuals.html#cycle
1) Talento 1 hour cycle timer/ each tripper represents 1.25 minutes
2) Model C8835/ each tripper represents 15 seconds.
To operate these timers certain hours of the day, add another timer in-line.
The in-line timer could be digital, but remember digital timers are not protected from power surge and tend to have more problems, and do not have replaceable clock motors and trippers.

Apr 08, 2010 | General Electric GE 24-Hour Timer, 2-Pin...

1 Answer

Setting


manual for HB51RC
http://www.intermatic.com/%7E/media/files/intermatic/products/instructions/timers/hb61rc%20-%20english.ashx
See timer at Amazon
http://www.amazon.com/Intermatic-HB61RC-Digital-Outdoor-Control/dp/B00004W4X5

Plug timer into outlet
Plug lights into timer
Timer turns on automatically at dusk + override lets timer run during daylight hours
Timing cycle repeats each 24 hours
Use selector button to set timer
Timer must be reset after power outage or after unplugging timer.
Push selector button and choose one of following

F > Lights are OFF
O > Constant ON
1 through 9 > timer turns ON at dusk and turns OFF 1 to 9 hours later
d > timer turns ON at dusk and OFF at Dawn
1. through 9. > timer turns ON immediately and then turns OFF 1 to 9 hours later
Maximum wattage 1000
50 mini-bulb-string of Christmas lights is 25 watts

Oct 02, 2009 | Intermatic Outdoor Timer/Photo Control...

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