Chris On 4/17/2015 2:05 PM, Glenn Burt wrote:
When I was installing them and using Tom Lane’s book, he recommended a solution of TSP be used for cleaning lines prior to charging with HTF. 1 cup per gallon of water is what I read. He suggests running it for 30 min, then flushing with clean water for another 30 before charging with HTF.-Glenn*From:*RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Kirk Herander*Sent:* Friday, April 17, 2015 1:21 PM *To:* RE-wrenches *Subject:* [RE-wrenches] flushing DHW collectors 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* dba Vermont Solar Engineering NABCEP^TM Inaugural Certificant VT RE Incentive Program Partner 802.863.1202 _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@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
-- Christopher Warfel, President ENTECH Engineering, Inc. PO Box 871, Block Island, RI 02807 401-466-8978
<<attachment: cwarfel.vcf>>
_______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@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
