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Thread: PLEASE HELP...Boiler Problems...

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    DIY Junior Member Jherne's Avatar
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    Default PLEASE HELP...Boiler Problems...

    First i will start by saying i have a Teledyne laars mini therm boiler system with 4 zones. 1 for basement, 1 for 1st floor, 1 for 2nd floor , and 1 for H2O heater. My problems started back in October when it was time to turn the heat on. I noticed one day that the Pressure relif valve was leaking and the pressure was at 30 psi. So i called a plumber and they told me to try bleeding the lines. did that, no change. Next thing i did was replace Pressure regulator valve thinking this was the reason the pressure keft going up. Still no change. Now just the other day i just changed the expansion tank and yet still no change. The last thing i have done is bleed the pipes one last time. But the pressure still seems to be rising to 30 psi and dripping water out of the pressure relief valve. i am at my wits end and do not know what else to do besides call a plumber but dont really have the money to do that hence why i have done things on my own and now im here. Any help would be greatly appreciated!

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    Diagnosis time. Shut the water feed to the boiler off. Lower the pressure to 15 lbs. If the pressure continues to rise then the coil in the indirect has a leak in it and it's allowing water pressure to enter the system.

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    Network Engineer rmelo99's Avatar
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    Sounds like you have changed out some of the common culprits of this problem (fill valve, expansion tank)

    Step back and stop throwing new parts at it. If the goal here is to save $$$ that's not the way to do it.

    Like the other posters said it's time to get some more information, maybe pics and the step into this to diagnose the problem.

    With the boiler cold can you maintain a steady pressure? 12-15psi? Does it rise when the boiler is hot?

    If you think it's bled of air then we'll assume there is sufficent water in the boiler. Turn off the valve so no additional supply water is introduced, that will at least eliminate one way "extra" water/psi is getting in.

    The other possibility was mentioned about the coil in the indirect tank.

    Come back to us with more information.

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    The problem can not be air.

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    Moderator & Master Plumber hj's Avatar
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    Default pressure

    I would think by now that you have spent enough of the money you do not have, that you could have afforded a plumber originally. Pressure can only happen for two reasons. Either the NEW reducing valve is defective or adjusted wrong, OR the expansion tank is not working to absorb the thermal expansion. WE cannot tell which without being there.

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    DIY Junior Member Jherne's Avatar
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    Default Uh Ohh

    Quote Originally Posted by Peter Griffin View Post
    Diagnosis time. Shut the water feed to the boiler off. Lower the pressure to 15 lbs. If the pressure continues to rise then the coil in the indirect has a leak in it and it's allowing water pressure to enter the system.
    Well, I did exactly what you said...turned off water supply to boiler, set pressure to 15psi and let the boiler run for a little while and when i came back to check it it was at 25psi. So it sounds to me like it might be the coil that you mentioned. Now, how much am i looking at to fix or replace this part? and is it something i can do myself? Thanks!

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    DIY Junior Member Jherne's Avatar
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    Here are some pics if it helps...Let me know if you need better pictures.

    http://s795.photobucket.com/albums/y...albumview=grid

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    Journeyman & Gas Fitter Doherty Plumbing's Avatar
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    Couple of things right off the bat...

    1. You should have a check valve installed on the system so your old stagnent boiler water doesn't creep it's way back into your domestic water so you can drink it later.

    2. That one fitting right off the boiler thats leaking like mad is not a coupling it's a thread protector.... Because of these leaks you're always introducing fresh water into the system and this is NOT good. Also not having an automatic air scoop is not helping with the matter.

    Now my question for you is that pressure tank you have installed rated for hydronic heating?

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    DIY Junior Member Jherne's Avatar
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    Quote Originally Posted by Doherty Plumbing View Post
    Couple of things right off the bat...

    1. You should have a check valve installed on the system so your old stagnent boiler water doesn't creep it's way back into your domestic water so you can drink it later.

    2. That one fitting right off the boiler thats leaking like mad is not a coupling it's a thread protector.... Because of these leaks you're always introducing fresh water into the system and this is NOT good. Also not having an automatic air scoop is not helping with the matter.

    Now my question for you is that pressure tank you have installed rated for hydronic heating?
    Yes the tank is rated for hydronic heating.

    1. Im not really sure where this check valve should be.

    2. I was a little confused when i read this...the only place it is leaking is out of the pipe coming from the pressure relief valve. well, in one of the pics i do have a rag wrapped around a shut off valve and it has a very minor leak but never enough to even soak the rag. So the major leak is coming from the pipe on the left side of the boiler.

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    Quote Originally Posted by Jherne View Post
    Well, I did exactly what you said...turned off water supply to boiler, set pressure to 15psi and let the boiler run for a little while and when i came back to check it it was at 25psi. So it sounds to me like it might be the coil that you mentioned. Now, how much am i looking at to fix or replace this part? and is it something i can do myself? Thanks!
    Dunno, depends on how much you have to pay for the coil. Changing it can be a real bear.

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    DIY Junior Member Jherne's Avatar
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    Quote Originally Posted by Peter Griffin View Post
    Dunno, depends on how much you have to pay for the coil. Changing it can be a real bear.
    Do you have any idea where i could buy a coil?

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    Journeyman & Gas Fitter Doherty Plumbing's Avatar
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    Quote Originally Posted by Jherne View Post
    Do you have any idea where i could buy a coil?
    Any plumbing wholesale style shop should have one. Or could order you one in.

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