Karl, You described an actuator that would connect the thermosyphon dump zone to the Tarm in case of a loss of power. Do you know what the power draw on the actuator would be? I assume that this would be a 24hr/7days per week load (to keep it closed) so it is important to know the what the load is. We have a system that could use a low draw actuator like this and I would like to know if you have a wattage for that valve.
Thanks, Dave -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Karl Schwingel Sent: Tuesday, November 11, 2008 12:26 PM To: RE-wrenches Subject: Re: [RE-wrenches] Pt valves as overheat control I've seen Tarm Boilers set up to thermosyphon to 30-40 feet of fin tube in the event of a power outage. there's a normally open zone valve (caleffi makes a wide variety of actuators for their zone valves, including 3 way zone valves, but no DC actuators) that will allow thermosyphoning when the power goes out. important with a super pricey wood gasification boiler in the country. I'd probably do something like that with my woodstove loop. hoping to do that with my stove here someday. Karl -- Karl Schwingel NABCEP Certified Solar Thermal Installer NorthWind Renewable Energy LLC PO Box 723 Stevens Point, WI 54481 [EMAIL PROTECTED] Cell: 715 209 0446 Fax : 715 952 4501 _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & 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
