Question about Rheem RTG-74DVP Direct Vent Liquid Propane Tankless Water Heater for 2-3 Ba

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30 gallon propane supply tank for residential home, seems appliances are burning too hot, flames are very high what is the cause? Regulator? O2 supply?

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Could you have gotten a natural gas tank by mistake? it would have larger orfices and allow more gas than you need propane has more B.T.U.s than nat gas and requires a smaller orfice
chack with your gas co.good luck.

Posted on Sep 08, 2009

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Posted on Jan 02, 2017

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1 Answer

Flame burning too orange


You need to get a Plumber or Appliance Tech to come out immediately and check the fuel to air ratio. You are not burning your fuel at the proper mixture. A blue flame is good, yellow-orange is bad.

Normally this is because the burner area is dirty or the pressure regulator may be set too high/low. The black marks are a sure sign that your ratio is too rich and it's just going to build up more soot and become unhealthy and dangerous.

http://inspectapedia.com/plumbing/Gas_Flame_Noise_Defects.htm
Don't wait...

Mar 27, 2014 | Water Heaters

1 Answer

How do you set tempature to make the water stay hotter longer? I have a Rheem 82v66 2 (65 gal) and cant fill my bath tub with out running out of hot water.


65 gallon water heater should fill more than 1 bathtub since typical bath only uses 12-14 gallons hot water. First hour delivery on your tank should be greater than 60 gallons.
http://waterheatertimer.org/Hot-water-use-chart.html

Since you have such a small amount of hot water, it sounds like bottom element is burned out, or one of the thermostats is bad. There are two thermostats, and two 4500 Watt elements on 65 gallon tank.
If upper element was burned out, or water heater was not getting 240V electricity, then you would have NO hot water. So we know upper element is good and circuit is good.

Ordinary tank-type electric water heater is fully repairable by homeowner and parts are available at hardware or home center.
I suggest taking 30 minutes and doing troubleshoot before replacing any parts.
Buy cheap multimeter from home center.
When testing voltage, rotate multimeter dial to 240-250-277 VAC
When testing elements or continuity, rotate dial to Ohms.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Add a comment for more free help. I can answer questions as you fix the water heater.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on heater.

Jan 11, 2011 | Rheem 65 GAL ELEC Water Heater 6YR Self...

1 Answer

Can propane liquify inside the tank during temperature changes and therefore have proplems dispensing


Propane is liquid in your tank. The vapor pressure will depend on the temperature as you can see by the following chart. For an example at 0F the vapor pressure in the tank would be 24.5 psig. and at 90F it would be 150psig. This is why you draw vapor from the top of the tank and then go immediately go through a high pressure regulator. Then usually at the appliance there is also a regulator (sometimes incorporated in the safety valve) You are burning propane as a vapor not a liquid. Remember for safety that propane vapor is heavier than air and sinks to the floor, so one must be careful for proper ventilation.
Temperature vs Vapor Pressure
(oF) (oC) (psig) (bar)
-44 1) -42.2 0 0
-30 -34.4 6.8 0.5
-20 -28.9 11.5 0.8
-10 -23.3 17.5 1.2
0 - 17.8 24.5 1.7
10 -12.2 34 2.3
20 -6.7 42 2.9
30 -1.1 53 3.7
40 4.4 65 4.5
50 10.0 78 5.4
60 15.6 93 6.4
70 21.1 110 7.6
80 26.7 128 8.8
90 32.2 150 10.3
100 37.8 177 12.2
110 43.3 204 14.1

Nov 08, 2010 | Water Heaters

2 Answers

Relief valve on my water heater is dripping.Can I fix this?


There are two solutions:

1) Replace TP valve with same temperature/pressure as existing TP valve.
Buy the TP valve at hardware store or home center or plumbing supply.
Turn off water heater so water cools.
Hot water inside a tank is explosive ... so open the TP valve and test water temperature.
If TP is on top of tank, you don't need to drain much water before unscrewing
If TP is on side of tank, use the TP valve to drain water -or- use the drain valve
Unscrew TP to remove.
Put teflon tape on new valve threads so it will seal against leak.

2) If the new TP replacement starts doing the same thing, there may be a thermostat problem -or- thermostat is set too high.
If you keep the water temperature set high, you can add expansion tank to incoming cold water line.
Home Depot sells expansion tanks. Plumbing supply carries them,
The tank for residential water heaters is about same diameter as a football and it goes on cold water line.
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Oct 31, 2010 | Water Heaters

1 Answer

I just replaced my gas valve thermostat on my 6 gallon Atwood water heater model G6A-7 and the pilot lights fine, but as soon as I turn up the gas, the flame almost engulfs the tank. There is even a flame...


Hi,
There are a couple of things to check....
I am assuming that the gas is LP or Propane....
make sure that the gas valve is for the right gas and not natural gas...
Also, it is possible that the regulator that cuts the pressure from the tanks is bad and that maybe why the original gas valve failed....
If you have the correct gas valve installed, get a gauge and check the pressure of the gas right before the gas valve...it should be somewhere between 8 and 12 inches water column...
If the regulator is not working properly, check that the vent hole in the regulaor is not plugged by a mud wasp nets or something like that...

heatman101

Jul 16, 2010 | RTO Atwood DSI-RV Water Heater-6 Gallon

1 Answer

I own a 31' trailer which has an ATWOOD G6A-8E RV Water Heater, 6 Gal electronic ignition, 2 yrs ago the pressure relief valve would open up and empty the hot water tank completely, it did this several...


Most electronic ignition models only show the red light if there is a problem, (did not ignite) for one reason or another. To start with, make sure your propane is on, and you have a good flame at stove top burner, just to be sure the water heater is getting propane, and all air is bled from the line, which may cause water heater to go into check. (red light) If it does, shut switch off, and retry. Let me know what happens. As far as pressure relief opening and emptying the water heater, and your sure it's not a faulty pressure relief valve, then there's 2 things to start with checking. 1st, does the water seem extremely hot, thus a possible faulty thermostat &/or ECO . Secondly, if the incoming water pressure is too high, that will also cause it to leak bad. Try installing a pressure regulator (usually 40 psi.) at your hose connection. Let me know what you find.

May 25, 2010 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

My refilled 60 # propane tank leaked and then stopped flowing.


Rick, if the tank is normally plumbed for a horizontal position, and you have it standing vertically, then you are feeding liquid propane to your pilot light, hence the frosted hose etc., and a tendency for the pilot light to go out as it has too rich of a fuel to burn. There should be no vent to allow air in as propane is pressurized, and only attains zero pressure at 40 below zero farenheit. The valve you speak of should have been the liquid vent valve which is used during filling only, and is closed during any other use. Your supply valve should be in the wide open position. The pressure relief valve is only operational when the tank has been overfilled or overheated. You should have a pressure regulator between the tank and the appliance you are trying operate. Hope this helped. Marvin

Jan 04, 2010 | Bosch AquaStar 125FXKIT-LP 125FX Liquid...

1 Answer

The number 12 shows and there is no hot water


The error 12 means flame loss. It is most commonly caused by insufficient gas pressure supplied to the unit, but it can also be caused by debris on the flame rod. Blockage in the exhaust vent or a stuck flue damper can also cause a 12 error code

Nov 09, 2009 | Noritz 6.9 Gallon Residential Direct Vent...

1 Answer

Hot water heater will not stay lit


Hi,
It could be that you need a new regulator if the pressure was low - and now is high - but it's over-compensating - virtually shutting off the supply.
Check all valves are fully open - and any water traps are empty. It is possible for there to be a condensate in there - that is occasionally blocking the nozzle - causing a flameout.
If there is any yellow flame at all or signs of soot- get the unit serviced.

Aug 28, 2009 | Water Heaters

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