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Posted by HeatPro on October 13, 2009 at 21:53:17:
In Reply to: Need to set low limit with a Honeywell L8148A posted by DP on October 13, 2009 at 20:45:21:
You are correct.
In normal multizone systems wired with an 8148, the burner goes on whenever there is a call for heat, so that is already done to make the burner run when any of the the zones get hot water. As you use the outdoor boiler to provide heat otherwise, you'd want the opposite to happen, so the oil burner doesn't turn on if the wood boiler is providing heat.
An L6006C strapped on the feed pipe to the exchanger, wired using R and B of the L6006C to reconnect the burner wire that was taken off the L8148 high limit terminal B back to terminal B when the water in the exchanger feed pipe drops below 110F would do what you want.
You'd need some 14 gauge 120V wire with one end using one wire of the pair on R and the other on B of the 6006C. The other end of the pair of 14 ga wires goes on the wire you take off the high limit B terminal and the other of the pair on the B terminal.