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Weil-Mclain Ultra 155 Kettling Issue
LynnT
Member Posts: 5
I have a Series 3 boiler installed 12/2009. The heat exchanger developed a leak and was replaced under warranty 02/2018. The boiler heats domestic hat water, some in-floor heat and a forced-air heat exchanger. The issue I'm having with it started over a year ago. Now, it is working fine but the boiling sounds coming from inside the heat exchanger have got me wondering. You can hear it thru the floor in the kitchen above the boiler. High limit's 190, same as always been. I had one tech out who didn't have much of an idea what it was. I haven't called W/M, not sure they'd be interested in diagnosing it. Who has ideas?
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Comments
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When was the last time it was cleaned with the maintenance kit?
When was the last time combustion was tested?
Has the inhibitor level been tested? It's an aluminum block and you went through one already.
Does the tridicator work? What's the pressure on the boiler?
Is it draing properly?
I don't see system supply and return sensors.
Are those Tee's 12 inches or less apart?
Pretty weird piping layout but I don't think that's the issue.
No auto reset codes in history?
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They take a hit on the inside from water quality, and on the combustion side from whatever they inhale.Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
Why is it running so hot? I would turn down the high limit to 175 and see if that helps.
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Thanks for the comments, I appreciate it along with probably guys reading them 5 years from now!
The original Glowcore boiler was less temperamental than this W/M. I have to manually reset it about once a year.
The set temp on zone 1 fan coil is 180, per the book. The city water is pretty good here in the upper midwest. I replaced the floor heat manifold recently and exchanged all the internal water at least twice, it's crystal now. It was rusty in the floor tubing, I think from the pump, which was disconnected. It did clear in 10 gallons. I had to use adapters and convert the 32 yr old red 3/8" PB tube to 3/8" PEX, since new manifold is not rated for PB.
HVACNUT: Thanks for the detailed comments! The boiler got a maintenance kit, scrubbed out and electrode 6 months ago. Combustion and inhibitor tests.....never. The block had a known flaw, susceptible to acid exhaust, that's cured with the new design. Tridicator works, 15 psi. T's are 12", yes. Condensate drains fine. Not sure why I don't have supply and return temp sensors. I do have a tube of Sentinel X-100 inhibitor that could go in now.
I'll see if I can attach a video and you can hear it run.
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Best I can do is this link to the video I took yesterday.
https://youtube.com/shorts/8VwwnowgFSQ?feature=share
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It doesn't sound like kettling, it sounds like a circulator bearing assembly.
In the first video, the noise is continuous. In the second video it seems to stop.
Do the screwdriver to ear test and listen at at the boiler circulator (0014?). Even though it's not quite 3 years old, it could be bad.
Do you have a way to check amps on it?
No glycol?
Yes, add the inhibitor. A test pack should've come with the maintenance kit.
Nothing in error history?
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I think you're right, it's the pump not the boiler. When the water storage tank calls for heat the red pump runs and there are no boiling sounds. I'm going to monitor it for now, thanks for suggestions!0
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LynnT said:I think you're right, it's the pump not the boiler. When the water storage tank calls for heat the red pump runs and there are no boiling sounds. I'm going to monitor it for now, thanks for suggestions!
I can't see exactly what circulator that is. Just make sure it's the exact replacement as detailed in the manual. I don't see a flo valve on the supply piping so I'm assuming the circulator has an IFC (Internal Flow Check).
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