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Temperature adjustment for Rinnai infinity 20 hot water heater (with out using remote controllers). Dip SW1 is used for temp control via configuration of 6 dip switches.

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You'll find all the information you need at http://www.rinnaiuk.com/download.htm

PDF's include schematics for all dip switches

Please note: you'll need to get the pdf that corresponds with the correct model you have.

Posted on Apr 13, 2009

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I can't remeber right now ,but I know you have to set the switches to raise the temp.

Posted on Mar 20, 2009

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I am trying to increase the temperature on the controller and it wont change. I have installed a new one and it still will not increase


[PDF]Operation / Installation Manual - Rinnai

https://www.rinnai.us/.../V_Series_Indoor_25xx_U...

Rinnai America Corp.temperature (shown on the digital remote control) the gas burner will ... Without the connection of a remote controller(s), the Rinnai Water Heater is preset to.

PDF]Tankless Water Heater Service Manual - Rinnai

https://www.rinnai.us/.../100000098_Rev_B.pdf

Rinnai America Corp.Indicates condensing water heater models. ... Rinnai Water Heater Service Manual. 2 ..... Digital manometer or U tube type manometer with 14 inch water column (W.C.) scale, a hose and two .... will flash on the display of the remote controller.

Nov 23, 2015 | Rinnai Digital Remote Water Heater Control...

1 Answer

Raise temp above 120


Raising temperature above 120 degrees requires service call.
Or change dip switch settings and risk voiding warranty and causing service call expense.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#temperature

Earliest versions of Rheem tankless 2006-8 let you set temperature up to 140 degrees F using remote.
However the hotter setting caused error codes because the burner cannot keep up with both high temperature and large volume of hot water rushing through pipe. Especially in winter with cooler incoming water that must be heated more to reach temperature set point.
The burner simply cannot keep up.
So Rheem changed maximum temperature at remote control to tepid 120 degrees, which is not hot enough for folks wanting hot shower, or folks filling whirlpool tub because water in tub cools before tub fills.

Oct 27, 2012 | Rheem Tankless Water Heater Main Remote...

1 Answer

Our Infinity RX26 is cutting out soon after the hot water tap is turned on, we get a few seconds of hot water then nothing. We are cold! please help!


sounds like faulty thermostat controller disconect from hw unit and try the water again if it stays on the controller is faulty if you dont mind not having controll over the temp of the water you dont need a controller to opperate the hws

Jun 10, 2011 | Rinnai Digital Remote Water Heater Control...

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

How do I turn it on? I press the "on" button and


The manual says:
http://www.coinwash.com/temp/rinnai.pdf

"For the name of the Authorized Distributor or Installer nearest you, please contact your local HVAC dealer or gas service technician, visit the Rinnai website (www.rinnai.us), call Rinnai at1-800-621-9419 or write to Rinnai, 103 International Drive, Peachtree City, Georgia 30269"

Manual says that the remote is for setting temperature.
When you turn on hot water spigot, tankless water heater will heat the water to the set point temperature.
If water heater is not set up to use remote, then tankless unit will heat to 140 degrees F.
"With the MCC-45-4US remote control installed the water temperature is adjustable from 96
to 180°F. The water temperature cannot be set to a temperature other than 140°F
without the use of the MCC-45-4US remote control unit. If you require a temperature
other than 140°F you must install the MCC-45-4US remote control unit."

"Error messages are displayed on the remote control units, simplifying service calls."

Page 9 of manual shows hot to set temperature using remote.
Water taps must be shut off to set temperature.
Circulating pump must be turned off.
"Simply press the H or C button until desired temperature is displayed"
"green in-use indicator will display"

If your unit is not working, the manual says to contact local plumber.
Fixya has specialists who will talk to you by phone about your problem for a fee.

Dec 18, 2010 | Rinnai Digital Remote Water Heater Control...

1 Answer

Rinnai Infinity 26 hot water system set to 55 degrees with remote temp adjuster. Water only luke warm for showers. Burnner working, water & gas pressure ok. Any thoughts ... Stephen


If you aren't getting any error codes, then the heater is probably doing its job. Your problem is probably somewhere in your plumbing system. The most common reason you get this sort of problem is due to cold water mixing in the hot water system. There are a number of causes for a "cross connection" :

-Faulty check valve
-Missing check valve on reciculation return line
-Faulty shower cartridge
-Thermostatic mixing valve set too low
-Faulty thermostatic mixing valve
-Faulty anti-scald valve

The easiest way to confirm a cross connection is to: 1) shutoff the cold water entering the tankless heater 2) open hot water valves around the house. If you still have water flowing at your hot water fixtures, then you have a cross connection.

Jul 09, 2010 | Rinnai Digital Remote Water Heater Control...

1 Answer

My Rinnai infinity 20 water heating is not lighting


Just joined fixya and am a Rinnai service manager in Australia. Is this still an issue?

Apr 11, 2010 | Rinnai Digital Remote Water Heater Control...

1 Answer

Only heats water to 1oo degrees and temp on remote is set at 140 ?


I just changed mine today with help from Rheem support as the manual had a typo error.

You should be able to increse to 120 max as default. However if you want to change to 140, you will have to perform the following as detailed in the manual ...

- Turn off the power.
- Remove the cover.
- There is a dip switch on the controller board. Flip dip switch #4 to "ON". Your remotw will start flashing.
- Press SW2 on the controller board for at lease a couple of seconds (The manual states SW1 which is incorrect)
- Flip dip swich #4 back to "OFF"
- close cover
- Turn on heater ... you should be able to adjust up to 140.

Dec 31, 2009 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

1 Answer

Our Rinnai tankless water heater is producing water as hot as pre


Power outage will reset Rinnai unit to that temperature. Read manual for more info.

Nov 28, 2009 | Rinnai Water Heaters

2 Answers

I need the manual for a Rinnai Infinity 26 hot water system


you can get it off the rinnai web site they have a spot on there to get the internet manuel,, but from what you are saying you may need to adjust the thermostat, or the temp, remember even though you will have endless hot water it still takes the smae amount of timed for the hot water to get to your faucet,, not only that make sure your shower heads aren't holding back to much water pressure, if you don't have enough water going thru the unit it will not stay lit, if will come on and go off, judt to dstisfy the unit,, make sure the filter is clear, on the cold side there is a cap screw if you take it off there is a screen in side you just pull it out and clean it and reinstal it,,

Jun 25, 2009 | Rinnai Digital Remote Water Heater Control...

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