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Posted by Ryan Smith on October 25, 2006 at 13:07:48:
In Reply to: Re: Burnham Revolution Circulator Location posted by HeatPro on October 24, 2006 at 17:41:15:
: Do you also have a circulator on the boiler loop, or are you just relying on the bypass circulators to do the flowing inside the boiler loop? There are two circulators inside the boiler jacket; but neither of them are for moving water OUT of the boiler, only to whiz water around INSIDE the boiler jacket.
: A circulator to make the water whiz around the few inches of main where the boiler inlet and outlet pipe joins the main will do the job.
: To repeat, it is a control strategy problem of how to get the flows right, not a boiler problem.
: The boiler is not shipped with a system circulator or zone circulators. (as stated on page 32 of the installation book.) So you have to have ANOTHER circulator to get the water out of the boiler piped loop to the main.
-- I have an install supplied (Grundfos)circulator for the main loop, but it is on the return side. I emailed Burnham with this issue at the same time as this post. They replied that the issue is definitely that the circulator is on the return rather then the supply side.
However, the Burnham tech guy raised a new issue - he said that an external reset controller is not recommended with the Revolution because it will create conficts with the Revolution's internal controller. The internal controller requires the aquastat to be set at 210 degrees. My reset controller calls for a much lower system temperature, usually around 150 degrees.
Now, if I can just figure out what the implications of these conflicts are....
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