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Having power at tank element and booster tank

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  • Water Heaters Master
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Unclear what question means.

Copy following link for troubleshoot.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Copy following link for wiring water heater elements, single-phase, split-phase, 3-phase:
http://waterheatertimer.org/How-to-wire-water-heater-thermostats.html

Posted on Nov 04, 2012

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Posted on Jan 02, 2017

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Since installing Rinnai RC80i tankless water heater, the performance of the dishwasher has diminished. The dishes aren't getting clean. I suspect the water temperature is not hot enough. The thermostat is...


follow this steps and fix it. God bless you
Drain a tank:
  1. Shut off power at the electrical service panel and post a sign warning others not to turn it on.
  2. Close the cold-water supply valve and open a hot-water faucet somewhere in the house (to speed draining).
  3. Attach a garden hose to the drain valve and run it outside the house.
  4. Open the drain valve and allow all water to drain out.
  5. To refill the tank, close the drain valve tightly and open the cold-water supply valve. Also open a nearby hot-water faucet. When a steady stream of water flows from that faucet, the tank is full and the faucet can be closed.
  6. Once the tank is full, turn the electrical power back on
Test and replace a heating element:
  1. Turn off power at the electrical service panel and post a sign warning others not to turn it on.
  2. Remove the access panel on the electric water heater.
  3. Disconnect one of the element wires and set a multimeter to RX1000 (resistance times 1,000). Touch one probe to an element mounting bolt and the other to each element terminal screw, in turn. If the tester displays anything but infinity ( open circuit), replace the element.
  4. If necessary, set the multimeter to RX1 and touch the probes to the terminal screws. If there is any resistance reading at all ( closed circuit), then the element is good. If not, replace it. Both upper and lower elements are tested in the same manner.
  5. To remove the element, first drain the heater.
  6. Disconnect the remaining element wire. Remove the mounting bolts holding the element in place. Remove the element.
  7. Replace the heating element with one of the same model, shape, and rating. Make sure you also replace any installation gaskets.
Test and replace a high-limit cutoff:
  1. Disconnect power to the heater at the electrical service panel and post a sign warning others not to turn it on.
  2. Remove the upper access panel and push the reset button.
  3. Replace the access panel and turn the power back on. If the water is hot, the reset was the problem. If not, you'll need to turn the power off again and reopen the access panel.
  4. Use a multimeter to test the cutoff terminals for continuity. If faulty, replace with an exact replacement part.

Oct 20, 2013 | Rinnai MCC-91-2W Commercial Remote...

1 Answer

Make a electric water heater elements come on at same time


1) You want simultaneous operation.
http://waterheatertimer.org/How-to-wire-water-heater-thermostats.html#simultaneous

2) Installation REQUIRES bigger circuit breaker and bigger wire.
Or 2 circuit breakers and 2 wires
Or change both elements to 2000 watt.
http://waterheatertimer.org/Color-codewire.html

3) MUST add ECO-protected thermostat to lower part of tank.

4) Warranty will be void.

5) If tank is rusted, the added heat and expansion could hasten rupture.
http://waterheatertimer.org/Replace-anode-rod.html

6) As general rule, the health department will not allow this tank conversion for restaurant code to meet dish washing consumption unless manufacturer certifies tank.
But manufacturer will not certify ordinary residential water heater for commercial simultaneous application. Commercial simultaneous tanks can cost 2-4 thousand so they can meet restaurant code and deliver sustained high temperatures for washing dishes.

6) Also consider Hatco booster heater for commercial dish washing.
This type heater has 2 sets of non-simultaneous elements to heat large tank of hot water.

Dec 21, 2012 | Rheem Water Heaters

1 Answer

Reliance 501 electric water heater with 4500 watt element. I believe I have a bad element (or both). I am losing my hot water temperature when bathing and washing dishes. Where can I find the elements and...


likely the elements are corroded you should turn off the power to the heater, then turn off the water supply to it and the exit shut off as well. Then drain the tank, remove the old elements take one with you to a local hardware store which should have replacement elements or will tell you where to get new ones.
once you have replaced the elements be sure to fill the tank and open the exit valve before turning the power back on.

Sep 21, 2011 | RELIANCE ELECTRIC WATER HEATER

1 Answer

Replaced both elements and tstats now there is 240 at both elements at once and only the top one is heating the bottom is coldreplaced bottom sgain thinking maybe bad from factory but still cold will i...


Electric water heaters never power BOTH the upper and lower elements at the same time.

If the water in the tank is cold, either the top OR bottom element will be powered through the upper thermostat (t-stat), never both at the same time. The upper t-stat will send power to the upper element until the temperature of the water in the top of the tank reaches the set point of the t-stat say 140 degrees. When the water temperature in the top of the tank reaches 140 degrees, the t-stat is "satisfied" and disconnects the power from the top element and sends it to the lower t-stat.

IF the temperature of the water in the lower half of the tank is lower than the set point of the lower t-stat, the t-stat closes to send power to the lower element. The lower element REMAINS powered by the t-stat until EITHER the water in the lower part of the tank reaches the set point temperature of the lower t-stat again, say 140 degrees; OR the temperature of the water in the upper part of the tank drops, at which point the upper t-stat "calls" and switches the power away from the lower t-stat and sends it to the upper heating element instead. When the top t-stat is satisfied, it switches power back to the lower t-stat. The process will continue back and forth for as long as needed to bring the temperature of the water in both halves of the tank to 140 degrees.

You must wait until the top of the tank is heated - before the lower element will be powered to heat the water.

I hope this helps you understand how the switching happens in these water heaters. Good luck! Please rate my reply. Thank you.

Mar 24, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Put in new elements was told they may be the problem that water heater just stopped working but hasn't come back on. Whats the correct process to put in new elements to insure operation of unit


Links below show step-by-step photos:
http://waterheatertimer.org/How-to-replace-water-heater-element.html
http://waterheatertimer.org/How-to-test-water-heater-element.html

If you turn power ON before tank is completely full of water, elements will instantly burn out.
For example if tank was half full, and power was turned ON, the upper element burns out, but lower element is still good.
If upper element is burned out, the tank will produce no hot water
If lower element is bad, and upper element is good, then tank produces some hot water.
http://waterheatertimer.org/How-it-works.html

Another thing to consider is the electric power going to water heater.
You mentioned elements, so you have 2 elements, which is 240Volt water heater.
Check wiring to water heater:
http://waterheatertimer.org/Test-circuit-breaker-and-electricity-to-water-heater.html
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on heater.

Jan 09, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

How do I change the heating element on my 50 gallon electric Reliance 501 hot water heater? Where can I get the heating elements?


Buy elements at local hardware store or home center, like Lowes
Look at label on side of tank.
Label shows element wattage.
Element is also printed on end of element in tiny letters-numbers.
Typical elements are 4500 and 5500 watts.
Tank needs 10 gauge wire and 30 amp breaker for 5500 watt element.

Water heaters are fully repairable by homeowner.

1) Have you tested water heater to see if element is problem? You need cheap multi-meter from Home Depot.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

2) To change element
a) turn off power
b) drain water from drain valve ... once it starts draining, loosen element slightly while tank still has weight to hold against you turning element wrench.
Here's what to do if water heater won't drain:
http://waterheatertimer.org/Water-heater-will-not-drain.html
c) open covers on tank, remove element using element-wrench from hardware store or home center.
If element won't come out:
http://waterheatertimer.org/How-to-remove-old-water-heater-element.html
d) Clean out tank if needed.
e) Replace element.
f) Fill tank entirely with water before turning on power or element will burn out.
g) Once tank is filled, and water flows steady out of tub spout, turn on power.
Each steps above is shown on following link:
http://waterheatertimer.org/How-to-clean-sediment-out-of-electric-water-heater.html

3) You need to buy some things:
Screw-in type (not bolt-in type) Element that matches wattage on tank label. New Element comes with washer.
Inexpensive Element wrench.
Inexpensive multimeter if you are going to test parts first.
Some pieces of pipe and hose if tank sediment needs to be cleaned out.
Washing machine hose if tank will not drain (return after job is done).

4) Also:
You need flat tip and phillips screwdriver.
Lighting to work on tank
Some WD-40 if element is stuck in place.
Garden hose to drain tank.
Shop vac and duct tape if you need to vacuum out sediment.
Tarp to protect floor and carpet
Maybe a knife to cut back insulation on wire if wire is burned at element.

Web links above go through entire process step by step.
Add a comment if you need more help, I'll be back around 5 CST

Nov 30, 2010 | RELIANCE ELECTRIC WATER HEATER

1 Answer

Water is hot but doesn't last long.


Your upper element is burnt out. open top cover, turn power of at breaker panel,drain hot water tank . remove black and red lead wires from the element use a socket to un thread the 3000watt 240 volt screw in element. re install the new element atach wires to element. Fill tank with water before turning on power or you will be replacing both elements very shortly

Feb 16, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Elec. hot water heater


thanks for your question, sounds to me like you have a burned out bottom element in the tank, depending on how old the tank is, the amount of calcium in the tank, will determine if you should repair or replace, if your tank is fairly new, then you will first have to shut the power off to the tank, turn the water off at the shut off, drain the tank, write down the model #, the serial #, what brand, and the ratings on the lower element too, go to the hardware store, buy a new element and element wrench, return home, write down which wire goes where on the element, very important ! remove wiring, remove element, that's the hard part most of the time, install the new element, rewire, close all panels, refill tank, do not turn the tank on before filling !! then after tank is full, turn power back on, you will have to wait about an hour for hot water, if the unit looks to old, then replace it. I would say anything over ten years is worth replacing, hope that helped ya, thanks again for your question, let us know what happens, mr.grzz

Jan 12, 2009 | Water Heaters

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