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Posted by Tony Hwang on November 1, 2009, 7:38 pm
Ron in NY wrote:
> A couple of weeks ago, I asked if anyone knew if the latest Honeywell L7224U
oil
> burner control box would hold its memory during a power failure. Well, I
> installed the box today, and I can now report that after a 4 hour power
> interruption (I programmed it this morning and installed it this afternoon),
the
> box held all of its settings exactly as I programmed them. It is also much more
> accurate and easier to use than the older L8124 series of control boxes, along
> with having a programmable differential on the high side as well as on the low
> side.
> ========================================================
> Remove the ZZZ from my E-mail address to send me E-mail.
Hi,
Usually they have small button battery inside like PC mother board.
Or big capacitor which will hold juice for quite long hours.
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