Question about Intermatic T104 24h 208-277v Mechanical Time Switch

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My T104 did not run after reset time of day. - Intermatic T104 24h 208-277v Mechanical Time Switch

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The circuit breaker suppling the timer probably tripped. Determine which breaker it is in your electric panel. Turn the breaker OFF, then back ON.

Posted on Jun 29, 2009

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How to wire a T174 intermatic time switch timer


Intermatic T174 wires exactly like the T104 240Volt timer.
Only difference between T174 ans T104 is the day skipper wheel on T174.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T104

These timers are very versatile and can be wired many ways, and changed to control different voltages by changing clock motor wires, or changing clock motor.
Voltages include typical 240Volt. But also 277V, 480V, 120V, 208V and 24Volt

Oct 25, 2012 | Intermatic T174 24 Hr 40 Amps Timer Switch...

1 Answer

How can i reset t-104


Lift and rotate dial until current time lines up with stationary silver pointer.
Open following link for explanation how to set and operate T104.
http://waterheatertimer.org/pdf/How-to-operate-and-set-T104-timer.pdf

Add a comment for more help

Take a moment and rate answer for accuracy:
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Sep 19, 2011 | Intermatic T104 24h 208-277v Mechanical...

1 Answer

I have Intermatic Model T104 timer for my pool. The power went off a few days ago, and i have not been able to set it where i wanted it since. I do not have a manual. The pool contractor didn't...


Open following links for T104 timer manual and information, and then add a comment for more information.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html
http://waterheatertimer.org/pdf/How-to-operate-and-set-T104-timer.pdf

To set timer, lift and rotate dial until current time lines up with stationary silver pointer.
Stationary silver pointer is pointed at 6:00.

Jun 24, 2011 | Intermatic Industrial 24 Hour 120v...

1 Answer

How do I program this timer?


T104R3 is ordinary 240V T104 timer mechanism inside a beige metal weathertight enclosure.
Put ON-OFF trippers on dial, lift and rotate dial until current time lines up with silver pointer.
Reset current time after power outage.
Open following links for T104 Instructions:
http://waterheatertimer.org/pdf/Intermatic-t104-240V.pdf
http://waterheatertimer.org/How-to-operate-and-set-T104-timer.pdf
Open following link if you have T104R201 with fireman's switch
http://waterheatertimer.org/pdf/Intermatic-T104R201-instruction-manual.pdf
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

Jun 23, 2011 | RTO Intermatic T104R3 Timer Switch 220V -...

1 Answer

I bought a house that had an intermatic t104 running timer running the pool pump. It worked for a little while then the clock stopped turning. The manual switch still worked to turn on the pool. I...


If you only have a Black wire, White wire and a ground wire, you are only wired for 120 volts. For 240 volts you have to have two Black wires or a Black and a Red as well as a White (neutral) and a ground.

Jun 21, 2011 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

Timer wheel seems to slip. Won't hold time


You posted under Intermatic T104 timer.
If you have different timer, information below may not fit your timer.
Add a comment with correct timer brand and model number.

1) Click manual override on-off to see if Load turns ON, and that override snaps crisp and clean and is not sluggish or hard to move.
If override is not functioning well, then timer is bad. Buy new timer.
2) If dial is rotating, note current time, and watch if dial is keeping correct time over full day.
If dial is running slow, then buy T100 series 240Volt clock motor for T104 timer.
3) If dial is keeping good time, then tripper might be worn and need replacement

Link below shows Intermatic T100 series parts:
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi

4) Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on timer, or any do-it-yourself project.

Jan 06, 2011 | Intermatic T104 24h 208-277v Mechanical...

1 Answer

How to wire a intermatic timer T104 240 v to a 120v?


T104 is 240volt timer.
Timer has terminals A 1 2 3 4
T-104 clock motor must receive 240Volts to operate.
Clock motor wires are white-colored and can be seen connected to terminals 1 and 3.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html
http://waterheatertimer.org/images/Back-of-WH40-2b.jpg

There are two work-arounds for using T104 for 120V.

1) Diagram 1 showing how to change wiring:
http://waterheatertimer.org/images/T-104-control-120V-Load-500.jpg
Move 240V clock motor wires to terminal 1 and A.
Connect 240V Hot leads to terminals 1 and A. This will power the 240V clock motor
Hot wire going to 120V load connects to terminal 2. This wire will be turned on each time timer turns on, and 120Volts will power the 120V load.
To complete 120V circuit, neutral wire that comes from neutral busbar in breaker box connects to 120V load.

To control additional 120Volt circuit, run jumper wire from terminal 1 to terminal 3.
Connect Hot to second load to terminal 4.

2) Second method is to change T104 timer into T103 timer:
http://waterheatertimer.org/images/T-104-control-120V-Load-2-5.jpg
Replace T104 240V clock with identical 120V clock motor from Grainger
http://www.grainger.com/Grainger/INTERMATIC-Time-Clock-Motor-1PNK1?Pid=search
Neutral wires connect to terminal A.
Hot wire from Breaker connects to terminal 1
Hot going to Load connects to terminal 2

To control additional 120Volt circuit, run jumper wire from terminal 1 to terminal 3.
Connect Hot to second load to terminal 4.

Dec 26, 2010 | Intermatic T104 24h 208-277v Mechanical...

2 Answers

T104 clock stopped running. must now use switch


Yes, you can replace the timer motor to solve the problem. For the Intermatic T104 you'll need to purchase the 208/277 volt timer motor. Part number is WG1573.
http://www.aplussupply.com/intermatic/timer.htm

If you don't want to mess with replacing just the timer motor you can purchase a new timer and swap just the guts with the old timer as long as the existing enclosure is still in good shape.

Mar 17, 2010 | Intermatic T101R3 110 volt time clock in a...

1 Answer

How do I remove the trippers on the T104, I want to reset the timer


Loosen the thumbscrews that clamp the trippers onto the timer dial. Move them to the times you want and tighten the screws. Silver trippers are for On and black are for Off.

Jan 17, 2010 | Intermatic T104-20 Indoor Hot Water Timer

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