el sid question [RE-wrenches]

[David Nixon]

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Hi Jay

I just did the spring start up on a pool system where the customer has 
installed a automatic pool cover. The drum that collects the cover is 
mounted under the deck. The cover runs on tracks that look like ones 
used on a sail boat mast for the sail. The tracks are hidden under the 
lip of the deck. You might look at a product like this for ideas on how 
to build your shade. The drum was driven by a hydraulic pump. Moving 
parts are always a pain, so instaed I would mount the collectors on the 
best angle for when you want the space heat. They will pobably still 
give you more than enough heat for hot water in the summer. And put in a 
heat dump. Also slowing your pump down under high temperature storage 
conditions will decrase the effeincy of the collectors, and help stave 
off stagnation. How about controling one of your series pumps with a 
high temp limit? We have done this on a system that has four pumps in 
series. I would use no plastic pipe! The solder used on copper should be 
the high temperature, high alloy type so joints dont let go under high 
stagnation temperatures. 

Hope to see you at MREF.

David Nixon




David Nixon 
ARISE Technologies Corporation
Kitchener Ontario Canada
david.nixon at arisetech.com

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