[RE-wrenches] On demand WH

[Tom Duffy]

AquaStar had this but it disappeared when Bosch took them over

Kind regards

Tom Duffy
Senior Solar Design Engineer
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From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of toddcory at finestplanet.com
Sent: Tuesday, October 01, 2013 11:19 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] On demand WH


i remember hearing there was one brand which had a tiny hydro generator, operated by the flowing water, which was used to light the burner... yet, no one mentioned them?



todd











On Tuesday, October 1, 2013 5:48am, "Bill Loesch" <solar1online at charter.net<mailto:solar1online at charter.net>> said:

>
> Hi Dick,
>
> Following the Carter era oil embargo energy awareness, pilot lights were
> reduced from ~700 BTU/h to ~ half. In a tank, that heat is put to
> amazingly efficient use; not so with a tankless.
>
> In places where they take energy usage seriously, the pilot light is lit
> only when the tankless is going to be used. A piezo igniter is standard
> on the standing pilot natural draft heater identified earlier.
>
> For all those folks with a tank, using it as a batch heater with the
> circuit breaker or pilot gas selector also eliminates the majority of
> standby loss. My pet peeve is folks who unwittingly heat the water well
> past the using temp and temper it with cold at the faucet.
>
> Glad you are pleased with your tankless operation,
>
> Bill Loesch
> Solar 1 - Saint Louis Solar
> 314 631 1094
>
> On 30-Sep-13 7:29 AM, Richard L Ratico wrote:
> > As concerns standby loss, I can't speak to the others, but the Rinnai has a
> > simple on/off button on the front of the unit. A remote controller is
> available
> > which also provides the switch. It does take afew seconds for the unit to
> boot
> > up. Up to three remotes may be installed, making the on /off operation and
> > temperature adjustment fairly convenient.
> >
> > Been using a Rinnai here, on grid for 10 years or so. It works. We like it.
> >
> > I understand a pilot uses a significant amount of gas over the course of a
> year.
> > Just sayin'.
> >
> > Dick Ratico
> > Solarwind Electric
> >
> > --- You wrote:
> > If its a Rinai, I measured one once that was 30 watts AC standby, and
> > jumped a bit higher when firing. It also needed pure sine.
> > The customer swapped it for a regular hot water tank.
> > Some Bosches and old Palomas, etc. had either a piezo ignition or pilot,
> > but took no power.
> > I'm working on a system with one now that needs 12vdc at about 5 watts.
> >
> > R.Ray Walters
> > CTO, Solarray, Inc
> > Nabcep Certified PV Installer,
> > Licensed Master Electrician
> > Solar Design Engineer
> > 303 505-8760
> > --- end of quote ---
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