NORITZ Tankless Heater--water temp fluctuation
NORITZ N069M TANKLESS Natural GAS WATER HEATER
We installed a NORITZ IN March of 2007. We have had water temp fluctuation ever since. We have had several opinions on cause of problem to no satisfaction. First we reran 3/4 line direct to gas supply about 5'. Second we contacted PGE and they resized the meter upward to 630 btu which is almost twice the size needed. I contacted NORITZ and went through the test procedure and all results were well withing operating ranges for supply and demand of water including outlet temperature. The flow through the heater during shower use was registering 1.5 gpm so have plenty of capacity. The temperature rise is from 58 to 120 degrees. A 60 degree spread and the heater should provide 5.5 gpm at that level.
The water pressure at the residence shutoff is about 60 to 70 during the day and does fluctuate a little within that range. At night the pressure has registered as much as 80 to 85 on the "WATTS'" Regulator Test Guage.
The NORITZ people felt that the problem was likely in our plumbing --like the MIXET valve in the shower. If the shower is in use the temp fluctuates slightly. If water is used any other location a dramatic change occurs. Not very pleasant.
I was about ready to remove the NORITZ and install a storage water heater to resolve the problem. Seems like a step backward so am looking for ideas.
The MIXET shower valve is a mechanical setting so don't see how that could be changing hot water flow. The only thing that I see is the input pressure change but no one seems to click on that.
pressure flux in system.....
This might sound stupid, but here goes....
Occsionally we get water mixing at the laundry outlets....
Now that you have installed this new system their might
be something mixing and fluxing at the washing machine...
WHO KNOWS WHY, it just t happens.....
try a very simple test and turn of f the hot and cold going to the laundry
and then take a shower and see what happens......
if that dont work,
you might want to change out that crummey Mixit valve
and install a good 1700 delta.....
NORITZ TANKLESS temp flucuation
Well--Sure have some ideas and things to check now. I will be busy setting up some tests and checking temps and flow.
I did install this heater myself but with the advise and consent of a licensed contractor who has installed quite a few systems and has resolved problems encountered.
Consensus at this point in time is that the Noritz is working properly and that there must be mixing taking place somewhere. Still wondering about the water pressure flucuation at the input. So will check this all out as best I can. Thank you much for the suggestions. Will let you know resolution.
NORITZ Tankless temp fluctuations
Well----did a lot of testing and other work over the 3 day weekend. Replaced the cartridge in the MIXET and tried a new shower head in the 2nd shoower. I find the 2nd shower works better than the MIXET one so there has to be some undesired temp variations from the MIXET. Alst feel that the water temp seems to follow the inlet pressure variations so the MIXET is more sensitive to that too. The suggestion to set at lower temp on the heater and use more volume also seems to help some. Seems that every thing we touch has impacts on the water temps so everything has to be perfect for the system to be static.
I looked at the Takagi specs and they are much the same as the Noritz. So if the Takagi seems to be static and works ok for a 2 1/2 bath home then we should be able to make this work. Replacing the MiXET valve is a major project but may be something that we have to consider. Did not anticipate tearing out the wall to get at the plumbing.
Thank you all for the suggestions and thoughtful replies.
Noritz Tankless temp fluctuation.
Yes I have learned a lot since I started this project. Little did I know how complex plumbing could be. A storage tank evidentally covers up a lot of possible sins in piping, sizing and fixture selection. Fine tuning is the understatement of the day. I will replace the Mixet valve soon. Will go ahead with the bathroom re-do a little sooner than originally scheduled. Looks like about 15 years sinc the last time so will look at a few estimates.
Will also have the whole system evaluated again at that time.
Thank you all for your patience and indulgence, Stan:)
strange smell and taste from new noritz
I am getting a strange smell and taste from a new noritz 931 DV
A distinct smell of concrete dust/metallic mix
Upon rinse of mouth with warm water, an odd taste and astringent feel to teeth and gum, almost like a weak acid.
Anyone else having this problem?
Noritz denies every having heard of this and so does my plumber and supplier.
Suggestion from supplier, run it for a week or two and then if we still have it they will send a rep out.
david in mass.