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Adjusting water temperature on water heater model 81sv-400 81820

Posted by Anonymous on

4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 297 Answers

SOURCE: I cannot find the booklet on the rheem's hot water

Hi,Bill and Arlene,in front of the unit there is a square box,on that is a dial,turn it to the right for more and left for less. please rate my answer.

Posted on Jul 21, 2009

SOURCE: i have a rheem glas standard 30 gallon model #

Look on label on side of tank.
Wattage of tank will be element wattage. This is true if tank has one or two elements since both elements are never ON at same time.
Simply go to hardware store and buy 3500W element.
Take phone photo to store if needed for identification.
http://waterheatertimer.org/How-to-replace-water-heater-element.html
Wattage appears on end of each element.
http://waterheatertimer.org/How-to-test-water-heater-element.html
http://waterheatertimer.org/images/Voltage-printed-on-element-.jpg

Posted on Apr 08, 2011

piemaker16
  • 35 Answers

SOURCE: HOW DO I ADJUST THE TEMPERATURE ON AN ELECTRIC PROMAX WATER HEATER

There should be some kind of a dial or electronic display on/near the heater or somewhere else in the building.

You could also try to contact the manufacturer.

Posted on Jul 26, 2012

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1 Answer

I have a Rheem 81SV-40D water heater, water is hotter in the morning and only warm at night. I don't see a time or anything. Can you please help me to figure out what's wrong? thanks


Dear Chu,
I think I am hearing you say the water is hotter if the water heater has sat all night without the usage of any hot water, and otherwise, it is not hot.
I should suspect one of your heating elements is not good any more.
Look and see if there are 2 removable covers on the side of the water heater, an upper and a lower.
Take a test instrument and, with the water heater unhooked from the power source, see if you have one element that shows no continuity with an ohm meter /resistance test.
That element can be replaced, sometimes you must drain the water heater water to do so.
God bless your efforts.

Feb 17, 2017 | Rheem Water Heaters

1 Answer

Water heats up then trips off red button


The lit red button may be an indicator that the water temperature inside the water heater flow channel has become too hot. If the outflow facet is adjusted to allow more water outflow (opened more) the water temperature should drop some and therefore with increased water flow, the temperature inside the water heater will also decrease. Or, if there is a manually adjustable outflow valve on the water heater, adjusting it to a more open position would also decrease the internal temperature.

Sep 17, 2015 | Water Water Heaters

1 Answer

Changing thermostat on ruud water heater


1) Copy following link to adjust water heater temperature.:
http://waterheatertimer.org/How-to-adjust-temperature-on-water-heater.html

2) Add a comment if more help is needed. Jan 2013

Jan 26, 2013 | Rheem Ruud Commercial Electric Water...

1 Answer

Temperature


Copy following link for adjusting water temperature on tank-type water heaters
http://waterheatertimer.org/How-to-adjust-water-heater-temperature.html

Nov 22, 2012 | General Electric GE SmartWater Household...

1 Answer

I have a Rheem EcoSense tankless water heater that I want to set the temp to 140degF. How do I set it internally for this?


1) The best place to find this information in your manual.
Typical Rheem manual in my files shows temperature is adjusted by pressing UP and DOWN temperature buttons on remote.

2) Manual says: Temperatures of up to 140°F
(60°C) for Light duty models and up to 180°F
(82°C) for Heavy Duty models can be
achieved with the MAIN (UMC-117) remote
control and a dip switch adjustment. Only
qualified service personnel should perform
this adjustment. Only factory authorized
remote control(s) should be used.

3) Typical manual shows information on page 22-23. Search pdf for 'temp'
http://waterheatertimer.org/pdf/Rheem-RTG74IndoorOutdoor_owners.pdf

4) This information squares with what I heard before that trained service technician is needed to adjust water temperature.
I think Rheem does this since tankless will not achieve that rise in temperature if incoming water is cold.
BTUs put out by tankless burner has limit.
If incoming water is colder than certain temperature, then tankless cannot raise temperature quick enough as water passes through burner.

5) You might also need a tempering tank, to modify cold water in winter:
http://waterheatertimer.org/Tempering-tank.html

6) Suggest you also read the yearly maintenance required for tankless.
For example tankless are prone to lime build up and need to be de-limed each year with vinegar.
Lime build up will certainly affect water temperature.

7) Following 2 links might be helpful for tankless owner:
http://waterheatertimer.org/pdf/Delime-tankless-water-heater.pdf
http://waterheatertimer.org/pdf/Paloma-Tankless-Error-Codes.pdf
http://waterheatertimer.org/How-to-install-gas-water-heater.html

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 water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Mar 04, 2011 | Rheem Tankless Hot Water Heater...

1 Answer

I have a rheem glas standard 30 gallon model # 81sv-30d water heater with upper and lower watages 3500. how do i know what size heating element i need?


Look on label on side of tank.
Wattage of tank will be element wattage. This is true if tank has one or two elements since both elements are never ON at same time.
Simply go to hardware store and buy 3500W element.
Take phone photo to store if needed for identification.
http://waterheatertimer.org/How-to-replace-water-heater-element.html
Wattage appears on end of each element.
http://waterheatertimer.org/How-to-test-water-heater-element.html
http://waterheatertimer.org/images/Voltage-printed-on-element-.jpg

Feb 12, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Hi, I have an old Atwood gas water heater (model j81 I think) this is a manual unit which we have to light the pilot light on. It will light and we can heat water for a short time only before it goes out...


That is not a model number that sounds familiar. Should be a tag on side of water heater behind cover, outside. If it has the little arm adjustment for temperature on top of gas valve, simply move it over a little to the left to increase water temperature, and try it until temperature is what you are happy with.
I'm assuming when you say it goes out completely that the pilot remains on and water heater re-lights when called for? If you adjust that temperature lever over, and water still doesn't get hot, you need to replace gas control, as thermostat is built in to it.

Dec 07, 2010 | RTO Water Heaters

1 Answer

I need to adjust water temperature, and dont have a manual. i have a 81v40d C model , 40 gal electric.


Hi,

Here is a tip that I wrote to help people understand how to adjust the temperature on their electric hot water heater.

Electric Hot Water Heater Temperature Adjustment
heatman101

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

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