Question about Intermatic EI210 Electronic Auto Shutoff Timers

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Time Saving Question

Are water heater's timers beneficial?

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A timer on a conventional electric water heater can save 5-12% on your hot water bill. The water in the tank remains hot for up to eight hours or more while the water heater is not in operation, depending on the insulation and age of the unit. However, the hot water is still available for household use until it is completely consumed. Thus, if a household has a fifty-gallon water heater, it will have fifty-gallons of hot water available while the water heater is not in operation. Most households won't notice the interruption unless they have high hot water use patterns in relation to tank size. It is best to set the timer during hours when hot water use is lowest, typically during the work day or at night. Adjusting the timer may be necessary if households experience a shortage of hot water.

Posted on Aug 27, 2008

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I have a Paragon water heater timer model # 4004-20 can't activate please help!


As a plumber, I would say you are better of getting rid of the timer. You aren't saving yourself much money at all using it, we're talking $50 a year at most. They usually wind up causing more trouble than they are worth.

Apr 28, 2015 | Paragon Hardware & Accessories

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This unit (WH21) was installed 1 mth. ago. This is my second unit I've installed with the first being for a friend and his has "NO ISSUES". In the last week mine the second unit has failed to...


You probably have defective timer.
I test timers, and some timers arrive defective.
I have not tested WH21, so check with your friend about the indicator light.

Mechanical dial timers make audible noise, and dial should rotate as time passes and keep exact time. If dial is not rotating correctly on new timer, then something is not working correctly. The level of timer is not an issue. It sounds like the motor gear is not engaging with dial.
To test timer noise, click manual override lever. You will hear same noise each time timer turns on-off.

WH21 is SPST 21amp timer which turns off one hot wire to water heater.
WH21 is rated to work on 4500Watt 18.75 amp water heater. Or smaller wattage.
Check label on side of water heater for wattage. WH21 is not rated for 5500Watt water heater.

There are many water heater timers:
Electronic timers give more precise time control and option for shorter on-off periods.
Electronic timers are quieter and don't need to be reset after power outage.
http://waterheatertimer.org/Boxtype.html

More expensive Intermatic WH40 timer is rated for greater capacity, and has replacement motors and trippers. WH40 is noisy too, but will last for years. WH40 is SPDT so it turns off both hot wires to water heater. I prefer SPDT, and have tested WH40 and other timers shown on link above.
To order extra parts for WH40:
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you via e-mail while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call

Feb 16, 2011 | Electric Intermatic Wh 21 Water Heater...

1 Answer

I turned the timer not meaning to and now i have no water i dont know what to do i think i am making it worse by messing with it


1) The Taco timer should control the recirculation pump only, but the recirculation pump should not interfere with water heater operation.
Open link below to get clearer picture how recirculation system works:
http://waterheatertimer.org/Water-heater-recirculation-system.html

2) It is unclear if you mean that no water is coming out of faucets?
Or if recirculation system is simply not working correctly.

3) To reset recirculation timer, manually rotate timer dial until current time lines up with pointer located on inner dial.
The dial should rotate as time passes, and small pins located on edge of dial push a switch that turns pump on-off.

4) If water heater is not working, then that is a separate problem.
Look at label on side of tank, and repost another question with brand and type of water heater, and we might be able to find a manual and help you solve water heater problem, or you might have to call a plumber if you do not have skills to work on water heater.

5) Please add a comment to this post, and I will answer back.

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.

Feb 14, 2011 | Taco 1/2" 006 BC4-TAC Circulator Pump/...

1 Answer

I have this timer hooked up onto my water heater in the garage . I have instant hot water at all times . My gas bill is 5 times higher than my neighbors . Is this what is causing it ? If I unplug it where...


I think you have a grundfos recirculation pump.
This is not a water heater timer.
For illustration of grundfos system, open link below.
http://waterheatertimer.org/Water-heater-recirculation-system.html
Recirculation system is electric, but it also causes gas water heater to run more.
Unplug grundfos for a couple months to see if gas bill goes down. Your system will revert to regular water heater.

Many things can cause high gas bill. Make inventory of gas-consuming appliances: dryer, oven, stove, heater, water heater. Then inventory how often these appliances are used. Each appliance has a label with BTU listed. Add up BTUs of all appliances and compare with BTUs shown on gas bill. Call gas company about how to cut back.
Gas water heaters can become inefficient. So can any gas appliance. Look at flame inside water heater when it turns on. If flame is yellow instead of clear blue, that indicates the water heater is inefficient, and burner needs to be cleaned, or heater needs replacement or maintenance.
Call plumber for assessment and then post a question on the Tank to double check anything plumber says:
http://www.thetankatwaterheaterrescue.com/forums/forum3/

More information about circulation system:
Notice that illustrations show a pump located under the sink.
It sounds like you have same pump located at water heater.
Both types are same thing.
The purpose is to circulate hot water to your faucet so you don't have to wait for hot water when turning faucet ON. Instead, you have to wait for cold water.

The timer located on grundfos dial determines when pump turns ON.
Link above has illustration showing how to set timer pins using your thumb or ink pin or nail file (women know nail files, so I'm relating here).
To set timer, rotate dial until current time lines up with mark. The dial rotates as time passes and has to be reset after power outage.
If dial does not rotate, then timer is broken, but it sounds like pump is still working, and running full time which is wasteful.
Next, move the pins to set on-off times. Move pins inward, the pump is ON. Pins outward, pump is off.
For more exciting reading about the grundfos:
http://waterheatertimer.org/pdf/Grundfos-L-UP-TL-043-install-photos.pdf

Dec 30, 2010 | Taco 265-1 / 563-2 Combination Analog 24...

1 Answer

I have a Et 70115C Intermatic Timer, I want to install it on my Hot Water Heater, I have connected the 2 110V leads from my breaker to Terminals 1 & 2 and connected the two leads from the hot water...


A) 5 terminal ET70115C.
Voltage selector set to 240.

B) BUT you say you have 120Volts from breaker >>> confusing, so I'm proceeding on basis that you meant to say 240V from breaker.
Add a comment at any time.

C) Review timer:
5-terminal ET70115 timer has NO and NC terminals
NC is normally closed >> this terminal has power when timer is OFF
NO is normally open >> this terminals has power when timer turns ON
For water heater, you want NO terminal 4 so water heater turns ON when timer turns ON

D) Wire for 240Volt water heater

Two hot wires from breaker connect to terminals 1 and 2. This powers timer clock.
Jumper wire connects between terminal 2 to terminal 3. This sends power to the switch circuit.
Wires to water heater connect to terminals 1 and 4

E) 5-terminal timer turns off 1 hot wire to 240V water heater.
Turning off 1 hot wire will stop 240V circuit from working; Water heater thermostats also turn off one hot wire.
240V water heater has black and red wire.
Wire from terminal 4 should connect to Black wire on water heater.

Diagram shows two wires on terminal 1
Two wires on terminal 2
One jumper wire on terminal 3
One wire on terminal 4
Zero wires on terminal 5


geno_3245_133.jpg

Dec 03, 2010 | Intermatic ET70115C Electronic Energy...

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

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...

4 Answers

How to Save Money?


You can try methods such as adding extra insulation to the tank and lowering the water heater temperature to 120 degrees.

Aug 27, 2008 | Intermatic HEATER DELAY SHUT OFF SWITCH...

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