Problems with Solaia Boiler/Carlin EZ-Gas Burner

topher77s

Hello all.

I have an 8 year old Solaia SL375 boiler with a Carlin EZ-Gas Pro burner (burner was ordered and installed new with the boiler).  About two weeks ago we experienced some delayed ignition when the burner tried to light.  Then the burner wouldn't light at all.  A tech from our heating company replaced the ignitor, did a combustion analysis, made appropriate adjustments to get the combustion numbers within spec. and got it running.  The company also wanted to replace the electrode/flame rod assembly but that part wasn't available for a few more days.  After this we had heat though the burner has dropped out and recycled several times over the past two days.  

Fast forward to today....a different tech from the same company arrives and installed the new electrode/flame rod assembly.  After this, the burner won't fire. He called Carlin tech support who advised replacing the primary control which of course isn't available for several days.  After the tech left I reviewed the manual and have some concerns.  It appears the new electrode/flame rod assembly is too short by a couple inches - too short for the flame rod to pass through the diffuser plate.  The tech swears this isn't the issue, that the new and old assembly were the same length and claims he put the old assembly back in and still couldn't get it to work so he reinstalled the new assembly and took the old one with him.  He says he is absolutely sure they ordered the correct part and the issue is the primary control.  

Can anyone confirm the correct part number for the electrode/flame rod assembly for the EZ-Gas that comes with the Solaia SL375?  The Carlin table shows the air tube is 12"/10” so I wanted to make sure which was correct.  I'm assuming they'll need to order a different assembly.  Unfortunately it's cold here now and it seems parts for these burners are not easily found around Richmond, VA.   

Thanks so much.  

Steamhead

I think the electrodes might be the problem. The manual is here:

https://carlincombustion.com/wp-content/uploads/MNEZGas-091319.pdf

Page 8 of the manual shows how the electrodes should be adjusted. If you shut the gas off and disconnect the gas pipe, you or a tech should be able to open the boiler's front door with the burner still attached, and check to see that the electrodes are within spec and also that they are not touching the diffuser plate, which would ground them out.

Electrodes are sold in sets- see the parts list at the end of the manual.

topher77s

Many thanks.

I looked and the electrodes are definitely not within spec.  The flame rod does not come through the diffuser plate at all as shown on page 8 of the manual  The electrodes and support rod are too short.  I am assuming they ordered the incorrect length.  

Steamhead

You should be able to loosen the clamp and slide the electrode forward, unless it's too short for that?

topher77s

It appears to be too short.  The electrode is all the way forward and still doesn't come through the diffuser plate.