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A Steam Odyssey: Midco Low-NOx Burner Oil to Gas Conversion Project
Following a series of technical email exchanges with Charlie Aiello at Midco International, I took the plunge and ordered their LNB-500 low-NOx modulating gas burner to replace the oil burner on my Utica Starfire steamer.
Joe Starosielec (JStar) from ecuacool was out to the house in March to scope out the job. In addition to the conversion, Joe will also be de-knuckleheading the near-boiler piping that the oil company installers put in when the boiler was replaced back in 2009, putting in a nice new 3" drop header, and fixing a few other off-boiler piping issues.
The burner will modulate based on steam pressure in the boiler, with an override control on low stack temperature. I've spent the last several months re-writing the boiler control software that I described here back in November to run in firmware on a single-board computer, and to add new modulating control algorithms for the steam pressure and stack temperature. In March I finished the wiring and continuity checks for the new controls box, and the unit is now in bench testing with simulated sensors.
The burner is scheduled to arrive on Monday; the conversion will be done over two days on April 17th & 18th. I'll post pictures and updates as the project progresses.
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