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Help with Lochinvar Boiler

I am one frustrated Lochinvar Owner. I had a new boiler installed last December. I now do not believe that the installer actually was 100% up to speed on how to do the install. First problem was they did some of the piping wrong and I had water going into my floor at 160 and rising. Got that squared away within a couple days thank goodness.
However, I did call in a more experienced contractor that I wish I had just used from the start. He explained that he still not that some of it wasn't piped the way they would have, but it seems to be working. Lochinvar also sent a tech over and clarified that although not exactly piped the way they would recommend, it's working.
Well, is it? I get a weird "hhumpf" sound upon start up. This happened almost immediately and was getting louder. The new contractor came in and checked combustion and got everything zeroed in. Still did not take noise away. Lochinvar says bad gas valve. Replace. Did that. Things sounded good for a couple months. And then the noise is back. This time Lochinvar says replace gas valve again, although strange that two would go bad and also change control board. Did both. Things sounded good....for a couple months.
Then again today. The "hhhumpf" noise is back upon start up. I am so frustrated. I have already poured thousands above and beyond into this stupid boiler.
Does anyone else have any ideas? Other things that would cause this gas valve to work fine upon installation and then begin making this noise? What else should they check? Literally the entire boiler has been checked and double checked. Combustion rates are right on. It does a good job heating the house. It heats two floors, and also a plenum in the furnace to heat the upstairs.
Could it be that something in the plumbing is wrong and maybe not actually "working" ? And to top it off, it doesn't happen EVERY time it starts up.
However, I did call in a more experienced contractor that I wish I had just used from the start. He explained that he still not that some of it wasn't piped the way they would have, but it seems to be working. Lochinvar also sent a tech over and clarified that although not exactly piped the way they would recommend, it's working.
Well, is it? I get a weird "hhumpf" sound upon start up. This happened almost immediately and was getting louder. The new contractor came in and checked combustion and got everything zeroed in. Still did not take noise away. Lochinvar says bad gas valve. Replace. Did that. Things sounded good for a couple months. And then the noise is back. This time Lochinvar says replace gas valve again, although strange that two would go bad and also change control board. Did both. Things sounded good....for a couple months.
Then again today. The "hhhumpf" noise is back upon start up. I am so frustrated. I have already poured thousands above and beyond into this stupid boiler.
Does anyone else have any ideas? Other things that would cause this gas valve to work fine upon installation and then begin making this noise? What else should they check? Literally the entire boiler has been checked and double checked. Combustion rates are right on. It does a good job heating the house. It heats two floors, and also a plenum in the furnace to heat the upstairs.
Could it be that something in the plumbing is wrong and maybe not actually "working" ? And to top it off, it doesn't happen EVERY time it starts up.
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Comments
trainer for Caleffi NA
The magic is in hydronics, and hydronics is in me
Wilson Services, Inc
Northampton, MA
www.wilsonph.com
[email protected]
As far as other appliances I did sort of think it happens more when the side arm water heater calls for heat but today now I have heard it with the basement floor heat and the furnace plenum kicking on (not at the same time)
I would suspect a sticking LP regulator. Sometimes LP tanks can have moisture in them. The LP leaving the tank acts just like a refrigerant (in fact it is used as a refrigerant) and if there is a little moisture in the LP or in the regulator it can freeze and cause gas pressure issues.
Talk with you LP supplier. They will probably check the regulators and they treat the inside of the tanks with basically "LP antifreeze"
They sort of thought this may be sediment/hard water as that can sometimes cause this. But this was a brand new boiler and was supposedly filled using the correct PH etc. They have not cleaned out the heat exchanger (is that the right term?)
I am just concerned that by not figuring it out, it's going to lead to a shorter life on this brand new boiler.
You're LP provider will check the outside regulator pressure for you at no cost.
Regardless of what the manufacture says about one pump doing it all, I most always pipe the sys in a primary-secondary configuration.
It is highly unlikely that several gas valves would exhibit the same issues and be defective.
Pics of your piping would help.
Update from today was the LP company and my tech both agreed it was a good chance it was the regulator. The LP company came out and replaced the one on the tank and the one on the house. Adding a 2 pound regulator on the house. He also added a couple of adjustment things in the house, you can see one next to the furnace in the picture and one is on top next to the boiler. He also added a test valve because it didn't have one. He said he had the pressure outside set to 13 and when the boiler is running it tests at 11 to 11.5 He also said this spring he needs to come back and trench a bigger line from the tank to the house. We were hopeful that would take care of the noise, BUT no such luck. Noise as present now as ever.
Something is NOT right. How can we go through 3 gas valves? And how can they work for a short time and then start this noise again.
I would also like to know why it sounds like popping when it runs at 100% because they say that happens from scale. Why would a new boiler have scale?
I am beyond frustrated because other than starting completely over, what more they can possibly do? If it's not the piping, and it's not the boiler itself and now it's not the gas line, what can it be?
When Lochinvar rep came out to my house, he said although the installer did not install it per manual instructions, it works? Well, sure it heats my house, but I paid alot of money for something to make these noises that just aren't right.
I also included a picture of my exhaust. The bigger pipes are the boiler. The smaller ones are the furnace. That never runs because we run the boiler through the coil in the furnace. How do you like the large icicle on the ground under it?
I am not even working with the original installer because I do not have faith he knows anything about it. He made alot of mistakes and many have already been corrected, but if the whole things has issues, how many more need correcting? I have spent a couple thousand in labor now over and above the original install.
It seems the outside reg should give you 2 PSI and then the inside unit reg drops to 13" and then the appliance gas valve reg sets it to what the input WC is required.
Any problems with the forced air furnace firing?
He put one on before the furnace too and said he wasn't worried in the least about that one. I don't run the furnace with gas because it heats the house through the coil that is heated by the boiler. We haven't tested the furnace itself since September, but it ran fine then.
You can choose to do what you want, but you cannot choose the consequences.
Usually the first stage reg at the tank is set for 10 PSI. With that a 100' run of 3/8" OD copper will carry 161,000 btuh @ 1 PSI drop or 220,000 @ 2 PSI drop.
So depending upon the length of pipe from tank to house and size of pipe (3/8" OD copper seems to be the smallest possible).
Then from reading in the "Rego" and "Fisher Control" LP manuals they both state that any regulator installed inside the house must be vented to the outdoors with 3/4" pipe (Rego book) or 3/8 OD copper (Fisher book).
Usually just a reg is installed outside the house and then pipe size as needed is installed to appliances.
This might be 3/4" pipe size for those 2 appliances (and you may have more than 2?) from the outside reg to boiler as needed.
The popping noise you are describing in the heat exchanger sounds troublesome as well. I like the suggestion to switch the plumbing to primary-secondary as Ironman and the install manual suggests.
I guess I should ask has anyone done a combustion analysis on the boiler? This is a stupid question, but today is my stupid day so I will ask--it's not an LP running with a Nat gas setup? gasp
I don't see a place where a CO meter probe was inserted into the exhaust, so maybe it wasn't done.
Also, I don't like to take a fitting off the exhaust of the boiler. I want at least 1' of vertical pipe before a fitting changes the direction of the exhaust piping.
And yes combustion has been done several times. Once with the NEW guy (installer never did one). And then again after each gas valve replacement. It was off at first but dialed in right to the book easily and has stayed there even after new gas valve. Didn't need any tweaking
There's a little red plug on the exhaust above boiler
You can choose to do what you want, but you cannot choose the consequences.