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Tankless hot water heater Jimbo 02-12-2007
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Posted by Jimbo on February 12, 2007, 7:29 pm


Installed Titan tankless hot water heater recently and all is well,
with the exception that the washing machine water starts hot then gets
cold and will not heat back up.

I even turned off the cold water valve at the washing machine and get
the same result. What could it be and what should I do?

Thanks


Posted by Rich on February 12, 2007, 7:51 pm


Jimbo wrote:
> Installed Titan tankless hot water heater recently and all is well,
> with the exception that the washing machine water starts hot then gets
> cold and will not heat back up.
>
> I even turned off the cold water valve at the washing machine and get
> the same result. What could it be and what should I do?
>
> Thanks

Well if everything else is working properly then it has to be the flow is to
low to trigger the heater to come on. Have you checked the screen on the
inlet of the washer? There might be enough crap in there to cut down on the
flow? I run the water in the sink to get my tankless heater going and hot
water in the lines while I'm loding the washing machine.

Good luck, Rich



Posted by hallerb@aol.com on February 13, 2007, 8:48 am


> Jimbo wrote:
> > Installed Titan tankless hot water heater recently and all is well,
> > with the exception that the washing machine water starts hot then gets
> > cold and will not heat back up.
>
> > I even turned off the cold water valve at the washing machine and get
> > the same result. =A0 =A0What could it be and what should I do?
>
> > Thanks
>
> Well if everything else is working properly then it has to be the flow is=
to
> low to trigger the heater to come on. Have you checked the screen on the
> inlet of the washer? There might be enough crap in there to cut down on t=
he
> flow? I run the water in the sink to get my tankless heater going and hot
> water in the lines while I'm loding the washing machine.
>
> Good luck, Rich

To check minimum flow while running washer turn on other faucet fully,
if water then heats its a minimum flow problem.



Posted by Bob Pietrangelo on February 13, 2007, 8:46 pm


Check the capacity of the heating unit at a given temperature rise. The
figure is fairly low. We do not install them for potable water unless they
are aware of the limitations of them, or are willing to install the proper
sized unit

The GPM is also rated at a maximum inlet temp. Also a consideration one has
to take into account.

I suspect your water heater is too small for your house. I would have the
plumber who designed and installed it replace it with the properly sized
unit. There is nothing wrong with the water heater.

Another way of operation is to add a storage unit, with a recirc line. In
that scenario you would pretty much have unlimited hot water. With out
much increase in fuel costs

--
Bob Pietrangelo
bobp3@comcast.net (home)
bob@comfort-solution.biz (work)
www.comfort-solution.biz





> Installed Titan tankless hot water heater recently and all is well,
> with the exception that the washing machine water starts hot then gets
> cold and will not heat back up.
>
> I even turned off the cold water valve at the washing machine and get
> the same result. What could it be and what should I do?
>
> Thanks
>



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