Aquastar for supplemental hydronic heat [RE-wrenches]

[Travis Creswell, Ozark Solar]

In my limited experience they want the storage tank so you can run a higher
flow pump dedicated to the AquaStar at max efficiency which is somewhere
around ~5 gpm.  Then when the zone calls for heat it can run on different
pump that is specified for the max efficiency heat transfer which is usually
2 or less gpm.

And that's all I know about that.

Travis Creswell
Ozark Solar

----- Original Message -----
From: "Jeff Yago" <jryago at erols.com>
To: <RE-wrenches at topica.com>
Sent: Monday, May 21, 2001 8:13 AM
Subject: RE: Aquastar for supplemental hydronic heat [RE-wrenches]


> I am installing an Aquastar instant DHW heater for total off grid moutain
> cabin (weekend use only) as part of a solar/gen/battery alternative energy
> package.  Limited cabin size and large central fireplace to provide most
of
> heat but owner needed a little heat in 2 back bathrooms and bedrooms.
> Ordered Aquastar 125BL designed for re-circulating systems but when
received
> installation diagrams from manufacturer it appears they require a storage
> tank to separate the heating loop and only show underfloor radiant
> heat(probably due to lower 130-140 degree operating range.)
>
> I have used baseboard heat on many other systems that worked just fine at
> this lower temperature by just using longer radiation lengths to get same
> output as shorter radiation operating at higher temp, however, why the
tank?
> I have had good results with other instant heaters re-circulating the DHW
> through radiation as long as pump and all piping were stainless steel or
> copper.
>
> Anybody had BAD experience using small re-reculating heating loop and no
> storage tank with an Aquastar re-circulating design unit?  Again, this is
a
> very limited size radiation loop.
>
> Thanks,
>
> Jeff Yago
>
>
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