[RE-wrenches] flushing DHW collectors

[Jerry Shafer]

We will use a vinigar water solution but you will need more volume fill it
and run it for some time then flush, repeat as nessesary. Cooked glycol is
messy to clean.
Jerry
On Apr 17, 2015 7:21 AM, "Kirk Herander" <kirk at vtsolar.com> wrote:

> Hello,
>
>
>
> I have an older 10 collector system in which the glycol has stagnated due
> to a defective collector sensor, apparently for some time. I was able to
> drain the collectors, the cooked glycol is black with a good bit of
> sediment. I tried to flush the system with water but my ½ hp utility pump
> could not pump the water entirely through the collectors. Suction slowed
> down and stopped after just a few gallons, as if the pump couldn’t overcome
> the effective head of the system. I had no problem using this pump to
> charge the loop when it was commissioned. I suspect the collectors may be
> gummed up with cooked glycol. I guess compressed air is next to try. Are
> there any safe chemicals to use to purge / un-gum the collectors? Thanks.
>
>
>
> *Kirk Herander*
>
> *VT Solar, LLC *
>
> *Proven PV provider since 1991*
>
> *www.vermontsolarnow.com <http://www.vermontsolarnow.com>*
>
> dba Vermont Solar Engineering
>
> NABCEPTM Inaugural Certificant
>
> VT RE Incentive Program Partner
>
> 802.863.1202
>
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20150417/132bb7d8/attachment-0002.html>