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Posted by Boiler Guy on January 17, 2007 at 21:11:56:
In Reply to: economizer recirc lines posted by j baughman on January 15, 2007 at 14:46:14:
: I have 3 firetube boilers with cannon economizers that were installed with no recirc lines. They were bypassed due to maintenance costs. I need to know what size line I can install that will work without overheating my D.A. tank? The feedpumps run continuous with a modulating valve at the boiler.
: Any info would be appreciated, thanks
Contact the manufacturer or its local rep for the proper flow rate required. All you need is a small line back to the DA and a valve that can be throttled, we're not talking a lot of water flow, just enough to avoid steaming. I seriously doubt the DA will become overheated. This is based on the economizer being upstream of the modulating valve otherwise will not work.
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