[RE-wrenches] Actuator valves as overheat control

David Palumbo dave at independentpowerllc.com
Tue Nov 25 08:07:10 PST 2008


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: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org]On 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
Karl at Northwindre.com
Cell: 715 209 0446
Fax : 715 952 4501













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