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Boiler is noisy at 160 deg presure is 17 psi

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Bleed the air

Posted on Apr 13, 2008

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Unit will not heat, change batteries controller cleaned filters etc. Still blowing COLD air


Check the thermostat setting...in the auto machines, with a reversing valve, there is no heating or cooling, generally, in the sensing temperature band of 19 Deg C to 22 Deg C and it only works on blower mode, re-circulating the room air. When the sensing temperature goes below 17 deg C, it works on heating and when the sensing temperature goes above 24 deg C, it works on cooling

Sep 05, 2011 | Air Conditioners

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No hot rads down stairs boiler comes on 3 miniutes then of again


Hello
By your post im guessing you have a 2 story house.
Have a look at the boiler,water pressure guage.Should be between 12 and 15 psi 140 to180.f when running.
If its above or close to 30 psi the relief valve will open to let off the pressure,we do not want this to happen normally.

If you have high water pressure at the boiler you will need to go to the highest radiator or any one on the second floor and open the bleeder.Looks like this

http://www.ourfixerupper.com/wp-content/uploads/2007/11/cast-iron-radiator-02.jpg

Carefully open it slow into a bucket,let air out until you get a steady stream of water.Do this to all of the radiators,idealy using a bleeder key or needle nose pliers.This may take some time.

Once we can assume all the air is out,check your water pressure again should be 15 to 20 psi.If you have no pressure then your auto fill valve is bad.If you have 15 to 20 then proceed.
Raise the temp of the t stat to start the boiler.6 degrees above whatever the room temp is.
If you still are having problems your t stat may be faulty.If your boiler is at 15 to 20 psi 140 to 180.f and it still shuts down after 3 min your return pump may be bad.

Hope this is helpfull

Dec 21, 2010 | Air Conditioners

1 Answer

The expansion tank that holds the coolant keeps evaporating although the radiator cap is new, I think the psi is not the correct pressure for this particular model, the cap I have on now is 1.1 psi. Is...


Most older radiators use a 8 or 10 psi cap newer radiators use a high presure cap 15 or 16 psi cap check your manufacture for the proper cap rating.

Aug 24, 2010 | Air Conditioners

1 Answer

Pressure upto max nearly im my bolier


You don't say what kind of boiler this is but I'm going to guess that it is a hot water boiler.  If so, you have a combination valve which adjusts the water by pressure and bleeds off excess.  These valves do get corroded and dirty.  Shut down the boiler, shut off the feed water valve.  Replace the valve assembly.  Do not try to adjust these things.  Your new valve should maintain about 15 psi.

Dec 19, 2008 | Air Conditioners

2 Answers

Powermax boiler 155, when boiler reaches operating temperature the presure relief vale blow's off at 3 bar, when it cools down the presure go's down too, right down to zero needing a water top up before a...


Sounds likes you have a hot water system. Some where you have an expanion tank that is full of water and it should be half full. It will a round tank above the boiler and may even have a site glass on the end off it. It will have a special valve on it to lower the water level in the tank. The tank is to absorb the expanding water as it gets hot, and releases it when it cools down therefore preventing your relief valve from popping off.

Oct 14, 2008 | Air Conditioners

1 Answer

I have a Super-Hot MG-100 boiler for my heating system. What is the temperature and pressure should be when the boiler is on? thanks


Normaly 180 degrees and pressure would be dependent on your system. But 45 psi to 65 psi are normal.

Sep 28, 2008 | Air Conditioners

1 Answer

I have a bosch 24cdi rsf combination boiler reaching 3 bar pressure and blowing off through release valve. any suggestions.


if this occurs when the unit is in use for only hot water, there will be an internal leak in the secobndary heat exchanger, you will have to replace it. check first that the charging link has been removed when testing to ensure it is not passing.
if it happens when the heating is switched on then check the presure in the expansion vessel ( dump all presure from system and use a car foot pump with a gauge there should be 1 bar presure) that is the big red thing behind the pump, if water comes out of the test valve on the front of it when you try to test it or it wont hold the presure you will have to replace it (a nasty job you have to strip half the boiler) if you can pump it up make sure you release the presure in the system as you pump it or you will get a false reading

Sep 07, 2008 | Air Conditioners

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