[RE-wrenches] Pt valves as overheat control

[Conrad Geyser]

Todd,



I’m afraid that any PT valves that I’ve ever known have continued to weep
indefinitely after one or two overheat triggers.

I would not recommend relying on them for heat control devices.



Conrad

Cotuit Solar

NABCEP thermal cert.



  _____

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Todd Cory
Sent: Monday, November 10, 2008 9:01 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] hydro coils



Properly protected with a code required  P/T valve this is a non-issue.

Todd

Conrad Geyser wrote:

Drake,

Yes the tank can overheat is the answer!  Anybody doing this should be aware
of the explosive nature of superheated water in a pressurized tank.
Assuming that you are using an insulated tank, you need plenty of storage.
It also helps to run the water coming from the bottom of the tank (to your
coil) through some baseboard so once the tank is heated to the bottom it
starts dumping heat as more is gathered.

Conrad
Cotuit Solar


-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Drake
Chamberlin
Sent: Sunday, November 09, 2008 2:08 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] hydro coils

At 11:56 AM 11/6/2008, you wrote:


is a thermo siphon feed as done in days of old.  This is self
regulating and worry free



Why is the system worry free?  Don't the coils thermo siphon into a
tank that could overheat?

Thanks


Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
740-448-7328
740-856-9648


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--




Todd Cory


KE6SXS


 <mailto:toddcory at finestplanet.com> toddcory at finestplanet.com


Mt. Shasta Energy Services


License C-10  #811428


P.O. Box 689


Mt. Shasta, CA. 96067


(530) 926-1079

“I'd put my money on solar energy...I hope we don't have to wait till oil
and coal run out before we tackle that."

∞ Thomas Edison, in conversation with Henry Ford and Harvey Firestone,
March 1931

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