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Hooked it up and no hot water. Trouble shooting. Elements are good. I have 240 in and 120 across elements. both of them. I believe it's interally wired wrong. Need wiring diagram for thermostat

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1 Answer

Hot water recover time


No.
Fold-back elements are low-watt-density, so element does not burn out as easily since heating is spread across more surface area. But recovery remains 16 gallon per hour.
20 amp breaker and 12 gauge wire: max 3800 watts
30 amp breaker and 10 gauge wire: max 5800 watt.
4500 watt element heats 20 gallons per hour.
http://waterheatertimer.org/How-to-replace-water-heater-element.html
http://waterheatertimer.org/Increase-amount-of-hot-water.html
Instead of changing elements: Set thermostats higher so more cold is added to hot water, and then you have more hot water available inside tank.
Gene

Jan 04, 2014 | Camco Copper And Zinc Standard Hwd Water...

1 Answer

Hot water heater


1) Check across top two screws on upper element for 240volts.
Circuit breaker can be tripped on one leg so water heater appears to have power, but only has 120Volts to ground, and not full 240Volt potential across both wires.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#electricity

2) Move wires to another same-size circuit breaker
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

3) Add comment and say what you find, and for more assistance Dec 2012

Dec 12, 2012 | Rheem Water Heaters

1 Answer

Bought about fours years ago, and water is not getting hot


How many gallon Heater is this?-- Does it have 2 elements-- one at the top and one at the bottom?

Is your water ;HARD'-- so that there may be alot of scale built up around the bottom element?

Have you ever pulled the bottom element, and flushed out the scale?

One more check-- With a clamp around amp meter-- have yo checked to see if the elements are actually drawing current-- This would mean checking the power to the heater, too- If you have voltage at the elements, but no current being drawn, then it is likely the element is burned out.

Do you need any help in figuring out the above trouble shooting checks?
Let me know-
Mack B

Feb 27, 2011 | RELIANCE ELECTRIC WATER HEATER

1 Answer

How to trouble shoot a thermostat : Model # K04A110844


disconnect the wires to check for 220v to the therm. same for the elements disconnect the wires to check continuity that the elements arnt shot. make sure reset is pushed in on upper element

Jan 14, 2011 | Reliance & 50gal Electric Water Heater

1 Answer

I just bought a 10 yr. old Schult mobile home and after moving it to a new lot, I have no hot water. The heater is an Intertherm. I checked incoming voltage and it is ~120v, and the plate says 240v. My...


The incoming voltage should be 220-240. Check voltage across terminal that power supply is hooked to.Each incoming leg should read 120 to ground and 240 across . Check to see that thermostat is turned up to highest setting,usually 140 degrees,and check reset button to make sure it stays in in position. If you push reset in and it pops right back out you probably have a bad element. Check elements by going across terminals when you know element should be on.Hope this helps you. Thanks

Dec 19, 2010 | Water Heaters

1 Answer

Water is not hot, doesn't last long. Thermostats turn elements on when turned up. Elements show 230 when on.


Lower element can be burned out and still read 230V across screws

1) We know thermostats are working because elements test 230V.
2) We know upper element is working because tank has some hot water.
If upper element is burned out, tank will have no hot water.
http://waterheatertimer.org/How-it-works.html

3) Here's how to test lower element:
http://waterheatertimer.org/How-to-test-water-heater-element.html

4)Here's how to replace element
Rheem element is 4500Watt bolt-in type
http://waterheatertimer.org/How-to-clean-sediment-out-of-electric-water-heater.html

5) Rheem manual says: Heaters furnished with standard 240 volt AC, single phase non-simultaneous wiring, and 4500 watt upper and lower heating elements.
http://waterheatertimer.org/pdf/Rheem-spec-sheet.pdf

geno_3245_94.jpgRheem 4500Watt element

Nov 21, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Not heating


un hook the incoming power lines, turn the breaker back on, and carefully measure power between the 2 hot wires, not the ground. You must have 220 to 240 volts between these 2 wires, if you dont either the breaker is bad, or the wire is broken somewhere. If you have 240 volts to the heater, with the power OFF unhook the wires from both elements and use an ohm meter to test the resistance on the elements, both should be around 30 ohms and about the same, if not one is bad. Test across the elements after re connecting them and turning the power on you must have 240 volts across the elements when they are on, if you have only 120 or 0 then the trouble is the breaker or the wire.

Mar 06, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Water is too cool for shower. Is there a thermostat?


I do not believe there is a separate thermostat. However the installation guide: http://www.eemaxinc.com/assets/files/FLOCO-install.pdf gives some trouble-shooting steps. More detailed trouble-shooting is here: http://www.eemaxinc.com/assets/files/floco-trouble.pdf

If the indicator light is off when the hot water valve is open: check your circuit breaker and the flow rate of water into the water heater (it must be over 1/2 gallon per minute). If those are okay, check the resistance of the element with a multimeter - 20 Ohms or less is good, 10,000 Ohms or so indicates a bad element. The trouble-shooting guide indicates the proper points to test.

If the indicator light is on, then check the flow rate at the shower head or faucet (reduce the flow until the water comes out hot), check that the unit is installed to the correct voltage supply and the resistance of the element.

If those are okay, then check that the printed circuit board is correctly installed and that the inlet filter isn't clogged.

After that, it's call the company for their technical support.

Cindy Wells

Dec 18, 2009 | Eemax EX95 "Flow Controlled" Electric...

1 Answer

No hot water, Rheem Model RR612T, Electric Hot Water Heater, 60 g


If you don't have current, 0v from terminal to terminal, then you don't have voltage to the elements. Replace the thermostat but check that you have 220v to the thermostat. It is possible that your breakers to the unit are either bad or tripped.

Apr 07, 2009 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

2 Answers

Limited hot water


Some checks are surely possible but PLEASE make sure that the 220VAC is absolutely shut down.
In a home we built in 1977, circuit breakers were improperly marked and I, with decades of experience, believed I had turned off the power to our water heater only to find that it was still 'hot' and blew away a screwdriver tip before thinking to check across terminals to see if the voltage was in fact OFF.
You may have the same problem I had twice over ~30 years; that the lower heating element is open/failed. These typically will gather a coating of mineral deposits and eventually be unable to transfer their heat to water fast enough to avoid overheating and failing.
The limited hot water comes from the fact that the thermostat is checking for temperature at the exit point of the heater; the top. The thermostat turns on both elements but with only the top one still working it heats 10-15% of the tank capacity and then shuts off.
With your meter set to the lowest Ohms scale (typically 200 Ohms), measure across the element terminals. You should measure pretty much a short since the elements have an extremely low resistance; on the order of 10-20 ohms, if you measure anything that goes 'off-scale' on the 200 ohm range (normally blinking), the element is shot.
Don't forget to drain the tank before pulling out the element!      
If you are in the US, near any city, check your white pages for: Johnstone Supply or check their website to see if one is near you.You will pay 1/3-1/2 hardware store prices for the replacement element - buy two, store the second one. They are 'wholesale' to the trade but have never been refused.
If you don't feel like wading through their extensive website, you can take the element with you and they can give you what you need.

Jan 25, 2009 | Rheem 80 GAL ELEC TALL Water Heater 6YR SC...

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