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

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Just installed the new t-104 and the clock runs slow

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The clocks on Intermatic timer run on-time for years.
If this a new timer >> then buy another one, and swap out the insides without changing the box, and return the bad one.

Voltage variation will not affect clock speed. The only electrical thing that affects speed would be the cycles. Your household has 60 cycles. The clock motor is 60 cycles.

When you connected wires, the wires fit under a metal clamp and the screw pushes the metal clamp down against the wire > only copper wire should be under that clamp > if some insulation is also under the clamp, then the contact might not be 100% all the time, which would stop the clock. Check that all your wire are down tight.

If wires stop in a junction box before arriving from breaker box, there might be a loose connection in that box. Trace back your line, especially if this is a pool control with a junction box.

A shorting breaker can stop voltage from time to time, making it appear as if the clock is slow. If one leg of the 240V stops, the circuit stops. You can check breaker for loose screws. Does breaker feel warm? Is there a crackling sound when you jiggle breaker. You can put your timer 240 lines on similar sized 240 breaker and see if clock runs slow ... that would indicate whether the problem is clock or breaker.

If timer is old, the plastic clock gears can get worn. The metal timer gears rust or clogged with dirt. Snap out the insides and inspect for rust and dirt. Use a little WD-40. Turn off power since WD is extremely flammable.

Snap the manual override back and forth. Does it snap crisp? Or is it sluggish? The clock motor turns the dial until the tripper encounters a metal lever. The Clock keeps pushing the tripper until the tripper clicks the metal lever >>> which happens to be the same lever the manual override is connected to.

So if the manual override is very hard to push ... ... a sluggish manual override might slow the clock. You might put some grease on the lever where the trippers touch.

Finally, the clock motor can go bad.
$16, Grainger sells 240V T100 series clock motor
http://www.grainger.com/Grainger/wwg/search.shtml?searchQuery=Wh40&op=search&Ntt=Wh40&N=0&sst=subset

Posted on Oct 09, 2010

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I had a T-104 timer installed on my water heater about 5 or 6 years ago. It is now starting to make a pulsing-type sound, but it does seem to be working okay otherwise. Is it something that could be...


The noise is from clock motor turning the gears.
When timer is new, parts have a bit of white grease on them.
Turn off power and spray WD 40 or apply some white grease.

The other possibility is that WG1573 240Volt clock motor is going bad.
Replace clock motor by tipping mechanism out using thumb spring located top inside box.
Buy clock motor and extra trippers from Granger:
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi

http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

Notice on image below, there is a bit of white grease on lever.
This photo is from new T104.
geno_3245_290.jpg

Feb 22, 2011 | Intermatic T104-20 Indoor Hot Water Timer

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...

1 Answer

I have a tp104 p3 intermatic timer and the clock is not working it looks like the motor for the gears are working but the clock will not turn


Motor has plastic gears.
Timer wheel has metal gears.
If metal gears are not turning, and clock is turning, plastic gears are probably stripped.

And metal gears might be dirty and rusted.
Look close where plastic and metal gears meet.

2 solutions:
1) clean metal gears and replace clock motor
T-104 takes T-100 series 208-277V clock motor
Add a bit of white grease where trippers meet metal lever
Grainger sells parts.
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi

2) buy new T-104 and swap out insides without changing box

geno_3245_60.jpg

Nov 12, 2010 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

No power to box. TEST switch seems to be jammed as well. No breaker switches are tripped. Any help would be fantastic! Thanx!


T-104R is raintight 240V timer.

1) No power to box:
a) Test timer for voltage: test screw terminal1 and screw terminal2 to bare copper wire to see if there is some voltage. See T-104 wiring.
b) Your 240V breaker can be loose on the busbar, and not be tripped. Jiggle it a bit and see if you hear crackling. Click the breaker switch all the way over and then snap it back.
c) The 240V breaker can have one wire loose, so only 120V arrives at timer.
In this case, the timer voltage can appear dead on some terminals, or live on some terminals, but the 240V clock motor inside timer and 240V Load will not work.
d) The loss of power is one thing, but a power loss will not jam the manual override on your timer unless there was some high-voltage event like a lightning strike.

2) Test switch jammed ... that must mean manual override is jammed
Lift and rotate dial so trippers are away from on-off lever, then try manual override again. If manual override was just stuck on a tripper, you need a new T-100 series 240V clock motor. It requires a small star-screwdriver to change clock.
http://www.grainger.com/Grainger/INTERMATIC-Time-Clock-Motor-1PNK2?Pid=search

3) If the manual override is bad, then timer is bad. Buy a new T-104 timer mechanism and install the mechanism without changing boxes. All T-104 timer mechanisms will snap into any other T-104 box.
http://www.grainger.com/Grainger/INTERMATIC-Dial-Timer-Mechanism-2E353?Pid=search

44e2f96.jpg

If this doesn't get you going, add a comment at bottom of page, and it will automatically send me an e-mail and then I will help further.

Oct 26, 2010 | Intermatic T104R 208-277Volt 40-amp Timer...

1 Answer

Have intermatic t103 time switch, 240 v supply, clock motor not turning. what the correct wiring for the clock. 2 white wires...


Maybe-bad news.
The link below shows wiring for the T-104, T-103 and T-101
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

For a 240V installation, the correct timer is the T-104, not the T-103
This is because the T-103 clock motor is 120V, and requires additional neutral wire on terminal A
The T-104 clock motor is 240V, and requires only the two hot wires and does not require a neutral.

I suggest you exchange timers and get the T-104
Or run another wire to nearby 120V receptacle and connect Terminal A to the white wires in nearby receptacles. This will give you the neutral that is needed for the clock.
In the absence of a Neutral wire, you can work-around by connecting ground wire to Terminal A >>> but this is NOT Code. You might use the ground wire as a temporary work-around until running additional neutral wire.

Oct 25, 2010 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

Timer is working but stops but stops at the on and off points like it don't have enough power to engage switch, timer is less then year old.


c92bcf0.jpg
The pins push the lever.

New T-104 comes with a bit of white grease on the lever.

The lever is connected to the manual override.
Click the manual override back and forth. It should click firm and crisp.
If the manual override is sluggish or it sticks, then timer might be bad ... buy a new T-104 and snap the new insides into the box without changing out the box ... and if you bought it at the local store, then return the new timer with the old insides.

If the manual override works crisp and clean, then the clock motor may be bad.
Clock motors and Intermatic timers run for years, but the clock gears are plastic.
You can buy a T-100 series 240Volt clock motor at WW Grainger for $16
http://www.grainger.com/Grainger/INTERMATIC-Time-Clock-Motor-1PNK2?Pid=search
I think you need a small star screwdriver to change clock motor

Finally, the main dial gears are steel. If timer is exposed to moisture and dirt, the gears can get rusty and that might cause dial to stall. Snap out the insides and clean out the dirt, spray a bit of WD-40. Turn off electricity because WD-40 is extremely flammable.

Up-vote if this information helped. Thanks for the feed back.

Oct 14, 2010 | Intermatic T104R 208-277Volt 40-amp Timer...

1 Answer

Clock does not work to turn pool filter on and off. do I need a new timer mechanism or clock motor


Things to check:

1) Is yellow dial rotating? If not, then clock motor is probably bad. T-100 240V time clock motor sells for $16 at grainger.
Also timer may not be getting 240V so check manual override.

2) If clock motor is turning, but manual override never clicks on-and-off, then pins are probably worn out. Buy pins at grainger

3) Does manual override work? Does it click crisp? If manual override clicks crisp on-and-off, and pool filter turns on-and-off normally, then a) the circuit is getting 240V and b) the timer mechanism is ok ... so clock motor is probably bad.

4) If manual override snaps crisp but pool timer does not turn on, then then circuit breaker could be bad, wire is loose, motor has gone bad
Test for 240 across poles 1 and 2
... or timer contacts are worn out & you need new T-104
See back of mechanical timer

5) If manual override is loose or sluggish, then you need new T104. You can buy a T-104, T-104R, T-104M etc ... and the interior body will snap into old box.

Note: Do not buy T-101 or T-103 as these have 120V motor.

Sep 29, 2010 | Intermatic T104M 208-277Volt 40-amp Timer...

1 Answer

My Ge Mechanical Time Switch (Model number 15087) is losing time. Is there any way to adjust the timer so that it keeps correct time?


There is no adjustment if timer clock is running slow.
Timer clock motors run slow when the motor starts to fail.
There are no replacement clock modules this timer.
Buy a new timer at Home Depot, and swap out insides of timer using 1/4" hex nut driver, and then return defect timer in new box.
http://waterheatertimer.org/GE-timers-and-manuals.html#15207

Aug 05, 2010 | General Electric GE 24-Hour Timer, 2-Pin...

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