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Posted by HeatPro on November 30, 2005 at 14:24:41:
In Reply to: Re: To HeatPro and Joe Brix posted by Dave on November 30, 2005 at 13:39:09:
When the boiler burner shuts off, what you have is a coil in a box like your zone coil heat exchangers. No moving air over the coils inside an insulated box means not much loss.
The elements of the electric tank do not require removal; they will have boiler water which is not changed, so will stay in near-new condition indefinitely. Then you would keep the T&P to comply with water heater code.
To get improved flow, you could use one lower element port as a port for the piping and the two top ones with the dip tube removed from the cold line (some contain check valves which restrict flow, and even the lower drain port with the top two. As you would not be using the elements at all, you could remove them and use the two top inlet and outlet, along with the relief port with the relief removed, and the bottom tapping. If the electric elements are removed, there is no need for the T&P valve, as there is no heating source to remove, that is in the boiler. Using the two electric element ports alone might cause a short-circuit during flow, maybe not.