Sting wrote:From here I think Ill just PM my thoughts so I don't appear argumentative!
I want to see you make that thing in your avatar appear, in a full sized picture.
Sting wrote:There is no one "best" solution
All our "enhanced" wet systems are a series of trade-off's unless we are willing to design from scratch.
These "trade-offs" may be viewed clearly in the picture that Greg has shared. The lowest bidder will only open a system enough to get his equipment in and functioning as fast as possible. Time is money. Unless you willing to clear the boiler room and THEN begin a major project like this - there is no best. Simply 'functional'
I am new here but would enjoy helping if I may!
How far do you wish to go to achieve "best" and help me to understand what you feel is "best"!
Are you looking for quick - with least piping and less functionality and operation economy because fuel is cheep
that would be boilers in series and reuse as much as possible, some manual things to swap, twist, or tweek during the season to keep things on line and some work (as the season cools and warms) to make the boilers play together as you wish.
Most fault tolerant, less human interaction, best economy in all seasons? That would be a correctly sized Primary/Secondary loop design with boilers in parallel, piping your zones with thermal traps, insulated pipes and automatic controls.
For some excellent reading on P/S check out Dan Holohans books “Pumping Away’ and “Primary Secondary Made Easy” at heatinghelp.com. Also John Sigenthaler has quite few articles available at http://www.pmmag.com on primary secondary design and applications.
From here I think Ill just PM my thoughts so I don't appear argumentative!
Coalbrokdale wrote: What would be needed to accomplish the "Primary/Secondary loop design with boilers in parallel"?
Coalbrokdale wrote: Do I need a second Pump and 2 or 3 thermal traps,
Coalbrokdale wrote: and what sort of automatic controls?
LsFarm wrote:I'm going to post again my method and suggestion, it follows the KISS principle; Keep I Simple Stu.... !!
Plumb the coal boiler into the return line before it enters the oil boiler... This way the cool return water from the house will be preheated before it gets to the oil boiler. Set the aquastat on the coal boiler 40* hotter than the aquastat on the oil boiler. The oil boiler won't come on unless the coal system is out.
You could install an electric damper in the oil boiler's flue... tied to the oil burner.. this eliminates heat loss up the oil boiler's chimney.
You can use the existing circulator pump, an additional one is not needed
So buy the coal boiler, some associated plumbing to connect it inline with the oil boiler, and buy and install an electric flue damper for the oil boiler..
This is the shortest items-to-purchase list. the simplest way, and IT WORKS..
I think this thread should be retitled to something like 'I need a bicycle, can someone tell me how to make a Space Shuttle?'
beatle78 wrote:I know he uses a single circulator pump for the whole system, I don't know if he needed a larger pump to account for the wood boiler or not. Perhaps someone here could comment on that.