Question about Rheem Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm
I've converted other LP gas appliances to nat. gas
Rheem water heaters should not be converted from propane to natural gas. The burners have been optimized for the rated gas and will not work as well after conversion. (Unlike ranges where the gas/air flow ratios can be adjusted when the burner orifices and regulator are swapped, the water heater doesn't have that option.)
I wish I had better news for you. I recommend you get a new water heater for the LNG service; it will be safer and more efficient.
Posted on Nov 10, 2014
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Posted on Jan 02, 2017
It sounds like your gas/air mixture needs to be adjusted. The flame should have just the slightest amount of white, at the very tip. The rest should be evenly blue. There is an air vent adjustment in the line to the burner, right after the gas input.
Posted on Sep 03, 2009
The easiest way is to add up total of all gas appliances in house, using information from each appliance label.
Measure diameter of pipe at meter.
Call gas company and ask them if you need larger pipe and/or meter coming into house.
Following pdf has calculations for figuring:
Posted on Feb 03, 2011
SOURCE: How can I tell how
I have a Rheem PTG-74XP tankless. I had the same code 12, low/inconsistant gas problem (assumption). In my case the gas (propane) pressure coming in was fine, the reason the flame rods/electrodes would not burn correctly was residue on/in them. It hasn't happened since they were cleaned. Hope this helps, dj :)
Posted on Feb 03, 2011
Anode rods for tank-type water heaters are located on top of tank.
This is true since anodes are about 44" long.
Top of anode is standard 1-1/16" hex nut.
Anodes can be located in 2 different places: either directly screwed into top of tank -or- attached to hot water nipple.
Most times the exploded parts diagram in manual simply shows 'anode rod' without specifing exact location. If your tank has long warranty, then it can have two anode rods, and 1 will be on top and the other probably attached to hot water nipple, or there could be two anodes screwed into top of tank.
If anode is screwed into top of tank, then it will be under a plastic cap -or- it will be concealed under the top cover of tank.
Look for plastic cap, and if none shows, then remove screws holding down metal cover and look there for 1-1/16" hex nut.
Lastly, remove hot water nipple and check for anode located there.
If you have 2 anode rods, then replace with same metal for each.
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Posted on Mar 22, 2011
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