Honeywell Flame Rectification

Jonn2018

Hi all after pulling my hair out with Honeywell tech support, as they don't really know their product, I thought I would post here. Have a Weil Mclain HE-4 Series 3 gas boiler. Heats fine, but every few days the system needs to be reset as it goes out on 2 flashes which is flame rectification signal is weak. So, my first step is I'll check for good grounds and ohm out the hot surface igniter.

This boiler does not have a separate flame sensor, the HSI is used. It has a S8910U1000 Honeywell ignition module. So I asked Honeywell how this one is tested as I saw the S8910U3000 has separate test points right on the module for your meter the 1000 does not. Honeywell could tell me nothing on two separate call and both individuals were lost.

Anyways, I believe the test is remove the GND terminal and put my meter in line and see what the milli-amp are?? My concern is would damage happen to the meter during the initial 34 second igniter warm-up period? There is no way I could see removing the ground and installing the meter after warm-up and while the burner flame was going as it would lose signal and burners would shut down.

Any suggestions how this is down on this system which does not have a separate flame sensor. I also included a pic of the controller.
https://i645.photobucket.com/albums/uu172/Hgy1243/S8910U1000_zpse7bnjeg7.jpg

JUGHNE

IIWM, I would just get a new HSI.
Even though it will do the ignition job, after some use and corrosion on the surface it may fall down on the job as flame sensor. Common problem.
Change that and see if you still have problems.
Assuming your ground connections are good...loosen and reseat them will often cut a new path for current flow.

Jonn2018

Jughne...thanks for the input..yeah that's where I was heading, just trying to figure out a test procedure on this one with this type of control module. I prefer to test and verify before and after. But I do hear you on the common problem you spoke of.

Jonn2018

Jonn2018

I think Tim McElwain had developed some kind of switch to do this not 100% sure if it was for this application