Hello Brian, I am running one of these older French models at home as well. Do you happen to have a source for parts?
Thanks, Jason Lerner Waldron Power and Light Co. On Sep 30, 2013, at 9:39 AM, Brian Teitelbaum wrote: > Hi Bill, > > I'm still running an Aquastar 125BS (original French model, before Bosch > bought them) that I installed in 1990. I've had to rebuild the water valve > once (after a freeze up; it's in an unheated outside closet on the north side > of my house), the high-temp sensor once, and I needed to replace the > thermocouple a few times when I was just using a small propane tank to run > it. I installed a 250 gallon propane tank in the late nineties and haven't > had to replace the thermocouple since. > > The Aquastar still works great, even when my incoming water temp is near > freezing. I just have to use less cold-water mix during the winter. > > Are you finding the new Bosch models to be this reliable? > > Brian Teitelbaum > AEE Solar > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Bill Loesch > Sent: Monday, September 30, 2013 5:00 AM > To: RE-wrenches > Subject: Re: [RE-wrenches] On demand WH > > > Hi Bill, et al, > > There are two major categories of tankless water heaters-natural draft (which > work very similar in control aspect to a conventional tank i.e.. > no electric required, some form of pilot light) and power vented (all power > vented machines have need for at least a fan, most a computer with some form > of display included - if your own body is incapable of telling you if the > water is sufficiently hot). > > Of the Big Five (major players in the tankless market) all manufacture one or > more models of power vented tankless. Today, only Bosch markets a natural > draft tankless. Bosch offers more than one model of natural draft tankless, > standing pilot and intermittent pilot. If you like simple, trouble free, and > low life cycle cost, you have but one choice. > > > http://www.bosch-climate.us/files/201304181918370.520PN_English_06.2011.pdf > > What must be properly addressed with _any_ tankless is intake and exhaust > venting, gas line sizing, and water quality. Since this isn't a tank, the > pilot flame does almost nothing in terms of freeze prevention. > > Some manufacturers state flow rate for their heaters without also providing > temp rise. Flow rate without temp rise is meaningless. The above is a 117,000 > BTU/h machine. Sometimes winter ground water temperatures are significantly > colder than summertime temps. If you want hot water in the winter, too, make > sure you use the appropriate temp rise. Hardness is the biggest issue with > water quality, if you scale the heat exchanger you won't get the performance > advertised. If you have hard water, a water softener or descaling _as > required_ is necessary. > > I am a big fan of tankless and have been since '89 when I was first > introduced to them as a user. Today, I install and troubleshoot all five > major manufacturers. Co-located with the load, tankless provides you not only > endless hot water but also instant hot water. > > Good luck, > > Bill Loesch > Solar 1 - Saint Louis Solar > 314 631 1094 > > > On Sat, Sep 28, 2013 at 10:19 PM, frenergy wrote: > >> Off-grid Wrenches, >> >> I'm working on a load sheet and am having a hard time finding >> standby and while firing electrical usage for a propane-fired on >> demand water heater. Do they some/all have standing pilots, glow >> bars, something else? I'm guessing the standby power needs are very >> low but we all know how even 10-15 watts adds up over 24 hrs when >> you're off-grid. >> >> If any body has some actual numbers rather than just pdf.specs >> (though manus specs might help some), I would be most grateful. >> Thanks in advance. >> >> Bill >> Feather River Solar Electric >> >> ------------------------------ >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Change email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Change email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
