Question about Bosch & Tankless LP Hot Water Heater

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How to install a propane system properly assuring that you have the proper flow/pressure to all appliances?

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Use the installation manual as a guide to sizing the gas pipe to insure good flow. The issue of pressure requires a manometer and adjusting the gas regulator on the side of the house (or at the tank). Professional plumber or gas company can take care of this for you.
When figuring out the gas pipe size, Do not forget to figure your other gas appliances in. All appliances should be able to operate and stay with in the minimum set forth by each manufacturer. Bosch is likely going to have the tightest requirement. If you do not do it correctly, plan on a cold shower.

Posted on Jul 27, 2010

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Posted on Jan 02, 2017

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Recently installed a Noritz NRCP 112 water heater, but very frequently it keeps shutting off and on the display it says error 60, after looking at the manual there is no explanation of what error 60 is....


Shut downs with new heater might be defective PC board.
Other issues could be associated with improper installation.
Low gas pressure caused by undersized gas meter or water in the gas line, undersized gas line to unit (requires 1" gas line to within 10 feet and then 3/4"), wrong type of gas line (cannot use flexible gas line), improper vent (for example too long horizontal run or undersized vent pipe or shared vent with furnace or other gas appliance), not enough incoming fresh air supply, nearby exhaust fans or vent fans stopping proper draft on tankless, temperature set too high for cold incoming water supply (install tempering tank to help preheat water),..
http://waterheatertimer.org/Tempering-tank.html

Other causes can be clogged water filter located where cold water enters tankless, or clogged water line, or crossover caused by bad single-handled faucet or bad crossover valve on recirculation system, improperly sized recirculation system. These problems can mean less water flow through tankless, so burner shuts down, and unit throws error code because sensor indicates water flow is still moving but inadequate to trigger burner
http://waterheatertimer.org/Crossover.html
http://waterheatertimer.org/Water-heater-recirculation-system.html


Gene
Water Heater Timers Save Money

Nov 27, 2014 | Water Heaters

1 Answer

Very loud foghorn sound


Loud rumbling noises are often caused by either water boiling in the burner or by entrapped air in the system. To help prevent water boiling make sure that the boiler system has a pressure between 15 - 30 psi. Also check for sufficient water flow and remove any sediment from the in-line filter. To remove entrapped air, install an automatic or manual air vent at the highest point in the heating system and also make sure you have a properly working micro-air vent installed. With the unit turned off and cooled down, you can also try flipping the lever on the pressure relief valve to try and flush out any air in the heat exchanger . Hope this helps.

Sep 06, 2014 | Noritz Water Heaters

1 Answer

Can this unit be converted to propane and if so what is involved in the conversion


Propane is delivered at a higher pressure it is also a hotter burning fuel then natural gas. One thing you would need is a pressure regulator that would reduce the gas to city pressure which is about 1/4 psi. If you can reduce the gas to that pressure you may not need to change the orifice but you may still need to adjust the air mixture to get a blue flame. A yellow flame would indicate that it is not burning correctly and is emitting unsafe levels of not properly burned gas. That looks like a Rannai I would check with them. It also looks like a ventless, Make sure you install it more then 3 feet from an opening (windows, doors, soft vents, other vents in the house) and not under a window.
Best of Luck
Ray

Apr 28, 2014 | Rheem Rtg53xn Natural Gas Tankless Water...

1 Answer

Rheem Model GT-199DVP-1, just installed but will not start up. There is power to the Thermostat. Water and propane are connected. No water runs through the system.


Water doesn't run when you turn on water tap?

Check inlet to see if joint compound or sediment flakes are clogging the water filter.
Check shut off valve to make sure water is ON.
Also check electric outlet with circuit analyzer, and confirm correct polarity and that unit is grounded. Unplug unit and test for continuity between ground plug and gas valve.
Make sure outlet is dedicated and not connected to other appliances and fluorescent lights etc.
Make sure unit is rated for propane. Check gas pressure and flow against rating of water heating unit.

Oct 04, 2011 | Water Heaters

1 Answer

My paloma tankless gas has a error code c2 11 c4 12 why


Open following link for useful troubleshooting information:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error code 11 is 'No ignition'
http://waterheatertimer.org/pdf/Paloma-Tankless-Error-Codes.pdf

Ensure you have gas to the appliance.
Ensure gas type and pressure are correct.
Bleed all air from gas lines.
Ensure gas line, meter, and regulator are sized properly.
Ensure appliance is properly grounded.
Check gas solenoid valves for open or short circuits.
Ensure igniter is operational.
Check igniter wiring harness for damage.

Error code 12 is 'Flame Failure'
Ensure you have gas to the appliance.
Ensure gas type and pressure are correct.
Bleed all air from gas lines.
Ensure flame rod wire is connected.
Check flame rod for carbon build-up.
Ensure gas line, meter, and regulator are sized properly.
Ensure appliance is properly grounded.
Check gas solenoid valves for open or short circuits.
Check power supply for loose connections.
Check power supply for proper voltage and voltage drops.
Disconnect remote control.
Disconnect and re-connect all wiring harnesses on unit and PC board.
Ensure proper venting material was installed.
Ensure condensation collar was installed properly.
Ensure maximum vertical vent length does not exceed allowable limits.
Ensure maximimum horizontal vent length does not exceed allowable limits.

Range of causes are part failure, gas pressure loss, air in gas line, improper installation of gas line or vent, 120V power to unit is disrupted or unit not grounded, circuit problems, venting problems, remote control, wiring to PC board, board failure, carbon build-up on flame rod, short circuits on gas valve solenoids.
The fact that you have error code tends to eliminate your plumbing as culprit, the error code does not mention air supply, otherwise it looks like every possible cause is on the table.

Add a comment with your experience so other with same-similar problem can benefit.

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 25, 2011 | Rheem Tankless Hot Water Heater...

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

1 Answer

Overflow pipe flowing


Check temperature off the water for proper functioning thermostat. Look at set points on heater's thermostat. It's made to let water out when water get's to a certain high temp. More than likely it will be the pressure relief valve going bad and not holding.

T&P releif valve can be replaced on heater. Turn water off and remove with a pipe wrench. It will come out and any hardware store will carry it. T & P pressure relief valve is 3/4 threads.

When installing new one use teflon tape on threads.

May 23, 2010 | Rheem 40 Gallon FVR NATGAS Low WATER...

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...

2 Answers

What is error code 59 on a noritz tankless water heater lp?


The 59 code is typically caused by insufficient gas supply to the unit. It can also be caused by obstructed exhaust flow, stuck exhaust damper (located directly on top of the unit's exhaust), insufficient makeup air, or improperly installed venting (i.e. too long or too many elbows).

I would recommend initially checking the incoming gas pressure at the gas connection on the unit. The gas pressure should not drop below 5" water column for a natural gas unit, 8" for a propane system (the unit need to be operating at its maximum output).

Apr 29, 2009 | Noritz 7.1 Gpm Propane Lp Gas Tankless Hot...

1 Answer

Hot water heater doesn't work 2 years old


First I would check to be sure your propane tank(s) are not empty and valve is not turned off and that the required gas pressure is being delivered to the unit i.e. pressure line tubing is not kinked or leaking - pressure regulator is operating properly.

Another culprit could be the thermocouple is malfunctioning or is not positioned properly, hence not allowing it to sense the flame.

Feb 21, 2009 | Water Heaters

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