Question about Intermatic T103 Indoor 120-Volt 40-amp Timer Switch-Double Pole/Single Thro

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Intermatic electric water heater timer only gives enough hot water for a 7 minute shower. How do I increase this time?

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Try turning your thermostat up 20 degrees. That will make hotter water, requiring more cold to mix so you'll use less hot water for the shower. If that helps but you'd like it longer, increase the temperature in 10 degree increments until you reach a temperature that works.

Posted on May 14, 2009

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Posted on Jan 02, 2017

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My family is moving in...how do i increase hot water availability?


large water heater, turn p the themo stat to a higher setting ( watch for burns with young childern and older folks)

or the best install a tempering valve. this valve mixs hot water with cold water before it goes into the building.

Again if you have young ones or old people they can burn faster than any other group.the best is a larger heater for the DIY person.

Thanks Tom

Sep 13, 2011 | Rheem Water Heaters

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I have a timer that won't hold the program time set schedule? I have paid an electrician to come out and check to make sure i don't have any shorted out wires?? Electrician didn't find any...


Question posted under 120volt Intermatic Eh10 timer.
I do not have repairs for defective timer.
EH10 has 1 year limited warranty.

Located just below the digital display is compartment for AA battery.
Display is controlled by battery.
Replace battery, press and hold reset button for several seconds to reset timer, and try to program again.
http://waterheatertimer.org/How-to-wire-EH40-hot-water-heater-timer.html#EH10
http://waterheatertimer.org/pdf/eh10-manual.pdf

EH10 and EH40 timers are susceptible to line noise.
If timer is connected to water heater, there is no line noise. And electrician tested for shorting wires.
But when timer is connected to fan, pump, or other type of load, then interference can be a problem.
Intermatic can provide a filter.
http://www.intermatic.com/customer%20service.aspx

Digital timers, digital water heaters, digital washer and dryer, digital water softener, digital treadmill, etc are increasingly common, yet are not protected from surge.
People protect computers and TVs, but forget other costly items.
EH10 can be affected by surge.
Install whole house surge protection:
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#surge

Aug 17, 2011 | Intermatic 7 Day Electronic Timer Eh10...

1 Answer

Have a Intermatic Water heatr timer connected to our water heater (obviously)... yesterday we drained and repostioned the w/h in order to place a drain pan under it. Now...no hot water. Believe we may have...


Timer is not identified.
Open following link to help identify timer and download manual and look at wiring diagrams for each.
http://waterheatertimer.org/Boxtype.html
By-pass WH40 and T100 series mechanical timer by removing trippers from dial and moving override lever to ON position.
How to troubleshoot mechanical timer:
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html

Water heater is electric since Intermatic does not make gas water heater timers.
Electric water heater must be completely full of water before turning on circuit breaker, or elements will instantly burn out.
Test electricity and water heater elements:
http://waterheatertimer.org/How-to-test-water-heater-element.html
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
http://waterheatertimer.org/Test-electricity-to-water-heater.html

Jun 20, 2011 | Intermatic Hardware & Accessories

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HOW LONG DOES IT TAKE AFTER INSTULATION TO HEAT WATER


Electric water heater typically makes 21 gallons hot water per hour.
Gas heater makes 41 gallons per hour.
If you use a timer on electric heater, it will make enough hot water for shower in about 15 minutes summertimer and 30 minutes wintertime. So incoming water temperature is a factor.

If your water heater is not full of water before turning on electricity, then elements will burn out.
Also the ECO might be tripped out: open top cover and push in red reset button.
How to troubleshoot electric water heater:
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html

Apr 18, 2011 | RELIANCE ELECTRIC WATER HEATER

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I have a Dayton time switch hot water heater timer model 2E214 7 day timer in a house that I just bought. Don't really understand how to use it. Where can I find a manual or user guide? Or can someone ...


1) Dayton 2E214 timer is Grainger number for Intermatic 7801B timer.
http://www.grainger.com/Grainger/INTERMATIC-Electromechanical-Indoor-7-Day-2E214

2) Grainger page also show extra on-off trippers for the timer

3) Same/similar timer shows for water heater on following link:
http://waterheatertimer.org/Boxtype.html#T7400

4) I have a similar manual in my files:
http://waterheatertimer.org/pdf/t7802b-2no-2nc.pdf

5) Intermatic site is offline this weekend but link to iNTERMATIC manuals is following:
http://www.intermatic.com/products/timers/mechanical%20time%20switches/7%20day%2040%20amp.aspx

6) If link above does now show exact product, then type Intermatic model number into search bar, and it will show manuals.

7) To operate the timer, attach silver and gold trippers to face of dial. See image below of Intermatic 24-hour dial.
The trippers are labeled on and off.
Buy more trippers at grainger if needed.
geno_3245_296.jpg

ON tripper pushes lever that closes circuit and turns water heater ON.
OFF tripper pushes same lever other direction that closes circuit and turns water heater OFF.
Dial rotates as time passes.
To set current time, rotate dial until current time lines up with pointer. The pointer is stationary.
I believe this model has to be reset after power outage.

8) Add a comment for more free help.
Also 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.

Mar 19, 2011 | Kitchen Ranges

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The spring that turns off the power in my Intermatic WH21 timer is broken. Where can I buy a new spring?


Parts are not available for WH21 240V water heater timer.
Timer has 1 year limited warranty.
http://www.intermatic.com/customer%20service/frequently%20asked%20questions.aspx
WH21 is rated for 25Amps and works on water heaters up to 4500Watts.
Look at label on side of tank to see wattage.
WH21 is SPST and turns off one hot wire to water heater.

I ran a business for many years.
Cost of stocking, organizing, and shipping parts is near same cost as new timer.

Following page shows selection of replacement timers:
http://waterheatertimer.org/Boxtype.html

For example, I have tested WH40 and T104 and other timers that show on page.
Trippers and motors are available for Intermatic box timers WH40 and T104, so you can maintain these specific models for many years.
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi
WH40 and T104 timers are SPDT and turn off both hot wires to water heater.
Both timers will work on any wattage residential water heater

http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html
http://waterheatertimer.org/How-to-wire-EH40-hot-water-heater-timer.html

Feb 18, 2011 | Electric Intermatic Wh 21 Water Heater...

1 Answer

I REQUIRE A TIMER THAT WILL LOOK AFTER 220 VOLTS FOR A SMALL WALL BUILT IN ELECTRIC HEATER SPRING LOADED 30MIN


You want spring-operated 30 minute countdown timer for 240Volt electric heater.
You don't say how many watts your heater is.
Answer is longer without knowing watts.

1) As you know, you can turn off any 240Volt circuit by turning OFF one hot leg.
http://waterheatertimer.org/240-v-water-heater-circuit.html#120-240
People are skeptical when working with 240 V and believe both hot wires have to be turned OFF.
But you know the heater needs both hot wires. Disconnect one hot wire and see.
240V water heater thermostats operate in this way ... they turn OFF 1 hot wire.

2) Intermatic FF30 and FD30 series timers can directly turn off 1 leg of 240Volt 2500 watt heater.
Max 2500 watt, no more.
This Intematic timer is rated for wattage shown. With other brands, check the rating.
Amazon sells FD30 30-minute
http://www.amazon.com/dp/B00004W4WW/ref=sc_vs_google_Intermatic_2520FD3

3) Intermatic also makes DPST timer if you want to turn OFF both hot wires
Aplussupply sells FF and FD Intermatic timers, and 30-minute DPST model FD430M
The rating is same as shown above.
http://www.electricsupplyonline.com/prod/intermatic-springwound_timers.php
http://www.intermatic.com/products/timers/in-wall%20timers/decorator%20spring%20wound%20timers.aspx

4) If your wattage is greater than 2500 watts, then you need to install a 30amp contactor with 120Volt coil. Timer turns magnetic coil on-off, coil opens and closes contacts that turn heater on-off. You can use any ordinary light-weight wall timer with a contactor.
http://waterheatertimer.org/Countdown.html

5) Following page gives you information for installing a contactor to handle 240Volt loads up to 5500 watts.
Pages show how to wire, where to buy, what to buy.
http://waterheatertimer.org/How-to-install-water-heater-timer.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 timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 26, 2011 | Hardware & Accessories

1 Answer

Can i use the timer for a water headter to trun on and off


Paragon 8145-20 is a 240V defrost timer
It is probably not best choice for water heater timer
Timer initiates defrost cycles each 4 hours.

A water heater timer should have more scheduling options.
-For example estimates show average run-time for water heater is 3 hours per day, depending on incoming water temperature, thermostat setting, and number of gallons used.
-To save money using water heater timer, you have to schedule times carefully so water heater runs less than 3 hours per day.
-Now your average electric water heater heats about 20 gallons per hour.
-Average shower uses 4-9 gallons hot water, so water heater needs to run 15-30 minutes (15 summer, 30 winter)
-Average bath uses 12-15 gallons hot water so water heater runs 45-60 minutes
-But lets say you run water heater for 1 hour and make 20 gallons of hot water. Then you take a shower, expecting hot water to remain in tank.
-Here's the problem ... cold water entered the tank to replace the shower water ... and the new cold water is cooling the rest of the tank.
-So a timer means scheduling hot water to match shower and bath events. For example taking shower and bath in immediate succession.
-Or set the timer for each individual hot water event ... for example set timer for 1/2 hour for shower, and later timer turns on 1 hour for bath, or 1-1/2 hr for 2 baths, etc
-> The flexible programming described above is not a characteristic of defrost timers.
I suggest Intermatic WH-31 240V or Intermatic T-104 240V or GE 15207. These are mechanical repeat-24 hour timers with manual override where each day has same schedule.
Digital programmable timers like Intermatic EH40 offer 7-day, 40 event programming. Weekends and weekdays can be different.
To see several box-type timers:
http://waterheatertimer.org/Boxtype.html

Sep 29, 2010 | Paragon 8145-20 Defrost Timer

1 Answer

I have a problem with my wh21 intermatic hot water heater timer.When it trips off the indicating light is still on dimly and there show low 92 volt on load side.


There is a short. The timer mechanism is mechanical, so the problem is not failed electronics.
The WH21 is for 240 volt circuits, so it has 2 hot wires and 1 ground from the breaker box. Only one hot line to the water heater is turned off, but both lines are attached to screw terminals at timer.
To see if the problem is a shorted element or shorted wire in water heater, disconnect hot leads to water heater one at a time, and then test. Then disconnect ground wire from water heater and test again. Then disconnect all wires to water heater, and test again.
If the problem is in the water heater, search for troubleshooting steps on internet. Focus on testing elements.
If the problem is not in the water heater, then a frayed wire on back of timer is next checkpoint. The timer motor is the final suspect. You can detach the timer motor from the housing, and test for stray voltage. Intermatic WH21 is inexpensive to replace.

Aug 23, 2010 | Electric Intermatic Inc Wh21 Water Heater...

1 Answer

Just got a new hot water heater, the other one was 40 gal...this one is 50 gal...I got a bigger one because it seemed like I was running out of hot water...now I am still running out of hot water when only...


Typically, a timer is not used with a hot water heater unless someone planned on being away from the dwelling frequently and didn't want to run the heater.

Another possibility would be that the heater shares a circuit with something and can't be on at the same time.

Anyway, excepting the above, it's ok to not use the timer - the heater should have a thermostat to regulate the water temperature. The "normal" setting should be high enough.

Mar 14, 2010 | Intermatic Electric Water Heater Timer...

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