Outdoor Wood Furnace Info
All-Purpose OWF Discussions => General Outdoor Furnace Discussion => Topic started by: MTJAG on April 23, 2016, 05:03:38 PM
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I have a Rinnai R75LSi that I've had up and running for 7 years. I've descaled four times. Four years ago, I put a plate exchanger in front of it that is in front of my outdoor wood furnace. Everything has worked fine for four years. About three weeks ago, I notice the water was not as hot and the flow was about 60% of my cold water flow. Even though the Rinnai hadn't signaled me to descale, I thought I would descale both the Rinnai and the plate exchanger....separately. I did the plate exchange, then went to the Rinnai. I flushed the Rinnai for about 45 minutes and then I think I messed up. I decided to swap the hoses around on the Rinnai to make sure it was flushed well. The flush pump wouldn't pump through the Rinnai after about 10 seconds, I shut the pump off and disconnected. However, I think I may have messed up a check value or something on the inside of the Rinnai as now the external check value is leaking water when I plugged it back in and I have virtually no water pressure. In fact, the Rinnai won't even come on when I hope a hot water spigot in the house and will only come on when I open the check value located under the Rinnai. On the Rinnai troubleshooting it shows the following: "Nothing happens when water flow is activated.
Check for cold to hot cross over. Isolate circulating system if present. Turn off cold water to the unit, open pressure relief valve; if water continues to flow, there is bleed over in your plumbing."
Mine is doing that, but it doesn't tell you what to do if that is the case.
Does anybody have any ideas?
Rinnai is closed for the weekend.
By the way, does anybody know what to expect on cleaning a 50plate HX? The return water line was very slow for the full hour of flushing. Does that sound right?
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I have a 50 plate between the shop boiler and the OWB, I get a full flow when flushing it. I use a puddle pump with a garden hose adapter, used to use washing machine use but made up a chunk of 3/4” garden hose with females on both ends for more flow.