Question about Rinnai Water Heaters
I have inspected the vent tubing several times and am certain it is all correct. The heating system is an open loop. The fan speed is constantly up and down. It will give me a code(10) when the fan continually revs fast. Error code 10 is insufficent cold air/ exhaust. I believe there may be some air is the system as we had run out of water over the summer.( we are in the country and on a well. My installer did not install a purge valve so I have been trying to purge with a garden hose at the hot water outlet of the heater as I hear air running through the heater. My main question is if air gets into the heater,would it cause the heater to try to heat the air and cause the fan to speed up?
It sounds to me like it is the flue gas exhaust and combustion air, NOT a water issue. If the error reads " insufficient cold air/exhaust" then it is the gas and air mix for the combustion process, not the water lines. Others have already suggested checking the flue and air inlet ("chimney"). Please do this, and ignore those who are giving you advice about the water loop.
Posted on Apr 25, 2017
I know that depending on what part of the country you live in, some areas can have there utility equipment out side the home not sure of your at but the exhaust must have a certain distance from the unit. If you exhaust threw a wall you should be fine. That being said I would check the inlet to make sure that you have good water flow there should be a small filter at the inlet for the cold water. You check and clean this anyway because you water was off. Then bleed the air out of the system. There are other things to check, but start there.
Posted on Apr 19, 2017
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Posted on Jan 02, 2017
it sounds like your flu pipe may be clogged,, they just snap together or have little screws holding them together,, take the sections apart and make sure nothing is is the line reinstall and try it out
Posted on Jul 13, 2009
Its A Possibility The Left Over Water In The Hot Is Frozen. If Your Line Is Exposed Outside Somewhere It Can Easily Freeze Up. Turn On The Hot Water Everywhere In The House And If Accessible Check The Lines To See Where The Warmth Ends. You Can Leave One Off Over Night In Hopes That It Will Eventually Defrost.
Posted on Jan 16, 2009
The vent pipe you use is the correct size for the heater.Longer runs require bigger pipe.I also would check to see if the water is getting to hot.
Posted on Mar 16, 2009
SOURCE: takes too long for hot water.
You need a recirculating line. You will have to hire a plumber to run a water line from the farthest fixture or to the fixture you are concerned about on the hot side and return it back to the water heater. this will cause hot water to constantly run throught the hot water line (via the recirculating line) and when you want to draw water from the fixture, you will already have hot water right at the line.
I know this works with standard tank water heaters, but it is a lil trickier with rinnai units(but very possible) if your plumber pleads the 5th and tries to sell you another unit call the Rinnai manufacturerand ask them how.
Posted on Jun 20, 2009
I was having the same problem untill I reallized it was my venting system. Test the water heater with no vent on top. Disconnect the vent pipe from the water heater and try turning on the hot water. the water heater needs a special adapter to vent the direct vent water heater. One other thing you can check is the gas pressure in your home. You have to have between 7 and 8 WC (water Column) for the tankless water heaters. You can call your gas supplier to find out what you have.
Posted on Jul 04, 2009
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