Nofossil,
Can you post a pic of the flue TC? I’ve had some ideas how to mount mine, I would like to see how you have your’s mounted.

last night was it too much wood / not enough storage?

Nofossil,
Can you post a pic of the flue TC? I’ve had some ideas how to mount mine, I would like to see how you have your’s mounted.

When I get a chance. I basically drilled a 1/8” hole in the thimble just behind the boiler and inserted the probe about 4”.

For innocent bystander’s benefit, ABGWD4U is looking at my real-time data from my site. You can get to it by clicking the ‘Display’ button on the ‘Orlan Boiler’ line in the data section of this page. I’ve also attached a snapshot below.

I’ve also caved to popular demand and added colors and legends for the digital I/O. Comments on the broken-line format for digital signals (right image)? Trying tyo decide if I like that format better.

ABGWD4U - 11 January 2008 02:21 AM

last night was it too much wood / not enough storage?

I assume you’re referring to the fact that the EKO is periodically idling, even early in the burn. My analysis is that I was burning smaller chunks of wood, therefore more surface area and a hotter fire. When there’s baseboard demand (top digital line on the graph below) I cycle non-baseboard loads in an attempt to keep the boiler near but not quite at the point where the EKO fan shuts down. Last night, I wasn’t adding heat loads early enough. The anticipation logic is not sophisticated yet. It takes a couple of minutes for the effect of a load change to make it through to the outlet.

The other digital lines, in order top to bottom:

Domestic hot water force
Recirc zone valve (inlet temperature protection)
Storage tank zone valve
Hot tub zone valve

Remember that the two thermocouple lines (the lower magenta and gray lines) need to be multiplied by 10.

You can also easily see when I added wood. The initial load was about 3/4 full but very loosely stacked and mostly smaller pieces.

At about 7:45, I added wood filling it a bit less than half full with medium chunks.

At about 10:15, I filled it half full with larger chunks.

Yes, I could have refilled it once at 7:45. I held off because I want it to be burned down a bit when reloading, and I like to reload it last thing at night.

I guess everyone knows my bedtime now

I like the change you made graphically to show demand.  Very nice touch.  I know the other graph groupies think your spoiling us.