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Re: What are the advantages to a cold start aquastat?


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Posted by Joe on December 22, 2003 at 08:58:57:

In Reply to: What are the advantages to a cold start aquastat? posted by Joe on December 21, 2003 at 09:01:39:

Cold start more applies to a boiler that has to run durring the summer to service an indirect hot water tank. If you have a tankless coil you can't do it. Many cast iron boilers will get too much condensation and soot up, especially if they're high mass. Will take too long to come up to temp to service an Indirect hot water tank. Better option is warm start, let the boiler drop to 120 degrees.
This works better on well insulated 3 pass boilers, since they're slower to cool down. Durring the winter the boiler will need to fire for a heat call anyway every few hours or so. True cold starts are unlikely then anyway.
Usually low mass steel boiler can run cold start since they can ramp up quicker and steel takes the stress better. You won't get 30yrs out of them though.





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