Bum, I Just Burned 21.4 Lbs Per Day for 1 Full Summer Week

 
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McGiever
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Post by McGiever » Tue. Aug. 26, 2014 7:05 pm

Yes, plan is good.
Recycle thermal grease as best you can.


 
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lsayre
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Post by lsayre » Tue. Aug. 26, 2014 7:13 pm

Thanks! And since I will have an unused W terminal, any potential ideas for how I might put it into action? At what temperatures will it make and break? I'm assuming break at 165 and make at 180.

 
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Post by McGiever » Tue. Aug. 26, 2014 7:23 pm

Best to look at the PDF for switching action details.

:idea: W terminal...over on the High Limit L6006A could have red light come on at Over Temp :idea:

 
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lsayre
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Post by lsayre » Sun. Aug. 31, 2014 9:02 am

McGiever wrote:Best to look at the PDF for switching action details.

:idea: W terminal...over on the High Limit L6006A could have red light come on at Over Temp :idea:
I've actually been considering the light idea. I burned only 17 lbs. per day for the past full week. The puff I experienced may have provided for some level of self cleaning action that raised the efficiency from the former 21 lbs. per day. :?: Ashes are looking much better.

I still have not swapped out the L4006A for the L6006A,

 
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lsayre
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Post by lsayre » Sun. Aug. 31, 2014 11:00 am

I just replaced the L4006A with my new L6006A, and I cycled it (ran hot water until it fired) to see where it would start and stop the fan when the temperature pointer was set at 180 and the differential was set at 15 degrees. It fired at 167 degrees, but it did not shut the fan off until it hit 190 degrees. That's a span of 23 degrees.

I've set the temperature wheel down by an estimated 2 degrees (to hit 165 for firing as opposed to 167) and I've set the differential wheel to right between 10 and 15 degrees, and I'll see what these changes accomplish.

The unit says "Made In Mexico" so perhaps this is the level of precision I should expect from it?

 
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Post by McGiever » Sun. Aug. 31, 2014 11:34 am

How did the thermal grease workout for you?

On the digital/electronic L7224 aquastat one gets exactly the setting numbers that one chooses at input. ;)

 
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Post by lsayre » Sun. Aug. 31, 2014 11:47 am

McGiever wrote:How did the thermal grease workout for you?

On the digital/electronic L7224 aquastat one gets exactly the setting numbers that one chooses at input. ;)
I found my old jar of thermal grease, so I gave it a nice thick coating. One shower and one load of laundry plus some hot water running later, and the boiler is firing now. Waiting for it to shut off to see what temperature it goes off at this time around. If 190 again, then it may well be shutting off via the L4081B instead of the L6006A (in which case its back to the L4006A).
Last edited by lsayre on Sun. Aug. 31, 2014 12:16 pm, edited 1 time in total.


 
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Post by lsayre » Sun. Aug. 31, 2014 12:10 pm

OK, the latest results are in. On at 165 degrees, and off at 185 degrees. That lets the L4081B off the hook, places the blame on the L6006A, and tells me that the differential scale on my new L6006A is way off. Is there a way to reposition the differential wheel relative to the pointer notch once I find out where 15 degrees of differential actually is on my dial? I'd sort of like it to say 15 degrees of differential when its delivering 15 degrees of differential.

Now I've set the L6006A's differential pointer down to 10 degrees to see what that does.

 
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Post by lsayre » Tue. Sep. 02, 2014 8:31 am

Latest update on the L6006A. With the differential at 10 degrees it is firing at 170 and shutting off at 180. Perhaps it just needed a break-in period? I just set it back to 15 degrees of differential (which is where I started out and got bizarre results ) to see how it behaves.

 
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Post by Rob R. » Tue. Sep. 02, 2014 8:39 pm

Is the gauge located close to the aquastat well? Perhaps the readings will be closer when the circulator is in use.

 
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Post by lsayre » Tue. Sep. 02, 2014 8:46 pm

Rob R. wrote:Is the gauge located close to the aquastat well? Perhaps the readings will be closer when the circulator is in use.
I thought of that. The gauge is on the opposite side from the aquastat. You may be right about better uniformity of temperature when the T-Stats are on and the circulator is running.

My latest change had it starting at 167 degrees and turning off at 183 degrees. Now I have the differential at 15 degrees and the temperature set pointer at 175 degrees, and I'm waiting to see where that starts and stops it.

 
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Post by Rob R. » Tue. Sep. 02, 2014 8:51 pm

If you are worried about the accuracy of the control, calibrate it.

 
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Post by lsayre » Tue. Sep. 02, 2014 9:03 pm

Rob R. wrote:If you are worried about the accuracy of the control, calibrate it.
Rob, what is a good method for doing that? I do have a digital thermometer and a tried and true dial thermometer. I guess I could have it turn on and off a light while the probe is in a hot water bath.

 
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Post by lsayre » Wed. Sep. 03, 2014 9:04 pm

On at 165 and off at 182 now. Close enough! ~17 degrees of differential with the variable L6006A vs. 10 degrees of differential with the fixed L4006A, and cutting off at just about exactly where the L4006A used to cut off. I'm already seeing much more complete burning based on observation of the ashes, both as to looks and content (volume and weight). I think this is working! Thanks McGiever! :D

 
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Post by McGiever » Wed. Sep. 03, 2014 9:09 pm

:) Your Welcome.


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