Question about Intermatic T104M 208-277Volt 40-amp Timer Switch-Double Pole / Single Throw

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I am going to install a T104M Time Switch on my water heater. My friend has the mechanism only which he will not be using. I need just the metal Enclosure so I can mount the mechanism in it. Is this available separately, if so what is the price?

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Posted on Jan 02, 2017

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SOURCE: need plain install instructions

Let me see if I can help

Power coming in from the live circuit ( Main Power ) needs to connect to The A Terminal and #1 Terminal and the ground point.

Power connection out to the equipment you want times connects to the A terminal and then the #2 Terminal and then the same ground point.

The #1 and #2 Terminals are your break point switch, so when the timer is one power is applied to the #2 terminal, when off, no power to the #2 terminal.

Hope that helps some.

Posted on Mar 24, 2009

mydogisk
  • 50 Answers

SOURCE: I need to instal a mechanical time switch

john, i'm assuming the water heater is 240 volts and the timer is 240 volts, if ok follow these instructions. the 2 wires coming from the breaker box goes on 1 & 3 screws, also each yellow wire going to the timer motor goes on 1 & 3. now the 2 wires going to the water heater goes on 2 & 4. be sure to ground the timer box

Posted on Apr 13, 2009

SOURCE: i am installing an intermatic

Add a comment and provide more information.
A lot of factors need to be narrowed down.

Did everything work fine before connecting fireman burn-out protection switch?
What happens when you disconnect switch?
Is the timer rotating?
Does the manual override work?
Is this a new installation?
This sounds like a dual T-104 pool timer that controls more than the heater, what else is controlled, and do the other Loads work correctly?

Posted on Nov 19, 2010

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2 Answers

Pool pump clock


T104M used WG1573 clock motor:
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html
http://waterheatertimer.org/How-to-replace-Intermatic-clock-motor.html
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#T100
The timer mechanism has metal gears, while the clock motor has plastic gears. If the metal gears get dirty and bind, it will strip the plastic gears.
Turn off power, pull timer out of box, Clean out timer with compressed air, and spray WD40, add a bit of white grease to lever where trippers make contact, then replace clock motor ... and buy another set of trippers to have on-hand since they are designed to wear down so timer will last longer.
If timer body is broken so dial does not rotate, then buy new T104 and snap new mechanism into old box. Buying whole T104 with enclosure is cheaper than buying T104M mechanism only.

May 15, 2013 | Pool & Spa

1 Answer

I have unscrewed my tier pointer by mistake to coincide with the current time on my T21004R timer. Now I cannot get into start and turn off where my on and off indicators are set. How do I correct thi


T21004R is single 240Volt T104M mechanism inside a 60 amp control panel.
The T100 series timer has stationary pointer that is supposed to be straight downward. Move pointer into downward position and apply bit of super glue to hold in place, or just remember where it should point.
Copy following links for instructions how to set and use the T104 timer.
http://waterheatertimer.org/pdf/How-to-operate-and-set-T104-timer.pdf
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#pool

The T104 timer is rated for 40 amps, and is usually repairable, uses WG1573 replacement clock motor, and 156T1978A trippers. Trippers are made of softer metal and are designed to wear out before wearing down timer mechanism.

Jul 20, 2012 | Intermatic T21004R- Pool-Spa Mechanical...

1 Answer

Just intstalled a T104M according to the diagram and all the diagrams found on the web. The clock timer doesn't work. I can manually shut off the pump from the timer. I thought it was a bad tim


T104M is 208-277 timer mechanism that fits inside any Intermatic enclosure.
If voltage is not correct, then clock motor will not operate.
Since you did not say what voltage, I assume you have 240Volt pool pump.
Open following link to see the many ways to wire this timer:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html
It is possible that you have the Load and Line wires reversed.
Line wire come from circuit breaker, and Load wires go to pump.

If the T104M mechanism is part of a control panel with more than one timer, and/or a freeze control, then re-post question with more specific information.

Jun 23, 2012 | Intermatic T104 24h 208-277v Mechanical...

1 Answer

I dont know how to set the timer


Question posted under Intermatic T104 series timer and pool control center.
Open following link to see how to set this timer:
http://waterheatertimer.org/pdf/How-to-operate-and-set-T104-timer.pdf

Intermatic T12404R control center has 2 timers.
Each timer is set same way.
Timer must be reset after power outage. If time dial is not rotating correctly or is sticking at the tripper, then the WG1573 clock motor can be replaced by homeowner.
Both timers are 240Volts, and can be wired in variety of ways to control different voltages. For example 120Volt pool lights, and 240Volt pool pump and pool heater etc.
Each timer snaps out of control center using thumb spring located top inside box.
Each timer mechanism is sold separately. One timer is T104M. The other is T104M201.
The difference is that the 201 has a 'fireman's switch' that can be wired to pool heater, and the switch turns off heater 15-20 minutes before turning off pump.
Each timing mechanism can be repaired by homeowner using available clock motors and trippers.
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#T100

Take a moment and rate answer:
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For a price, expert works with you while you work on timer or any do-it-yourself project.
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Sep 11, 2011 | Intermatic Timer T12404R Pool & Spa...

1 Answer

I have a Intermatic T40404R and need a replacement timer. I have examined the timers in my unit and find no part numbers. Other sites offer a T101M as well as a T104M. Which is the correct timer for my...


Thank you for including model number.
Intermatic catelog shows that T40404R is shipped with two T104M timer mechanisms.
However the mechanisms can be changed out for either T101M or T104M, and these timers can be wired many different ways so there is not 100% certainty unless you know or test voltages.

Here's the general difference
T101M is 120 Volt with 120Volt clock motor
T104M is 240 Volt with 240Volt clock motor

You can buy $20 clock motor and $3 trippers and fix the timer mechanism instead of replacing it.
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#T100
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html

Add a comment to this thread any time as you're working on project and I will get message.

Other useful links:
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#pool
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

Upvote the help.
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.

May 21, 2011 | Intermatic T40404R - Pool-Spa Control...

1 Answer

I am installing an intermatic t104m with firemans switch.I hooked up the switch to the pool heater and no power to heater?


Add a comment and provide more information.
A lot of factors need to be narrowed down.

Did everything work fine before connecting fireman burn-out protection switch?
What happens when you disconnect switch?
Is the timer rotating?
Does the manual override work?
Is this a new installation?
This sounds like a dual T-104 pool timer that controls more than the heater, what else is controlled, and do the other Loads work correctly?

Nov 19, 2010 | Intermatic HEATER DELAY SHUT OFF SWITCH...

1 Answer

When timer reaches stop time, clock stops too.


The power incoming to the timer (known as LINE) must be on terminals 1 and 3 as this is where the clock gets its power from. The power leaving the timer going out to whatever you want to control (known as LOAD) should be on terminals 2 and 4. This way the timer motor has power all the time.
When the timer is on terminal 1 connects to terminal 2 and terminal 3 connects to terminal 4.

Jun 27, 2009 | Intermatic T104M 208-277Volt 40-amp Timer...

1 Answer

I need to instal a mechanical time switch


john, i'm assuming the water heater is 240 volts and the timer is 240 volts, if ok follow these instructions. the 2 wires coming from the breaker box goes on 1 & 3 screws, also each yellow wire going to the timer motor goes on 1 & 3. now the 2 wires going to the water heater goes on 2 & 4. be sure to ground the timer box

Apr 13, 2009 | Intermatic & Indoor/Outdoor Rain Tight...

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