weird noises from circulator pump.

Bibbop

Hello to all,

(Weil-Mclain Gold oil units, Taco 007-f7 circulator, Fuelsmart Hydrostat and a Taco 329-3 pressure reducer set at 12psi)

As a preparation for the cold I tested the heat after being off all summer.

The pressure safety valve seemed to have opened up and released water in my basement.

Soon after when checking the status on the pressure seems to climb up to 26psi as soon as the burner starts. 12 psi steady with no burner.

InitInitial thought was the expansion tank yet no water on the valve and measured 12psi on the gouge attached.

My pressure safety valve is now on constant leak. (Even on low psi on the system)

Took apart the circulator pump (cartridge style) it does seem quite rundown yet no clog or much debris. It does make quite the noise now yet it not steady. The noise repeat itself every now and then. (See video) I'm thinking it's air in the system?

Hydrostat is set on 180HL off(LL) and ECO-2 yet I still get as high as 198 when wheating the house. (Not sure why)

My thoughts were to get a new pressure safety valve (30psi). A new expansion tank (#30) as they are both quite old.

Prices for the cartridge vs the circulator pump unit whole are not that far so am considering a new circulator pump.

All this will not solve my issue if indeed I have air running through. (Noises at the pump).

• This unit is only used for house heating via floor radiators. No air release anywhere except one Taco unit close to the expansion tank.

Heatcirc.zip

Quite long of a post but tried to cover all ends for proper diagnosis help. Thanks to all you amazing people In this group.

EdTheHeaterMan

Perhaps a little more information. Other than that, maybe it is trying to tell you something.

Bibbop

https://forum.heatinghelp.com/discussion/comment/1814337#Comment_1814337

Sorry EdTheHeaterMan. With the kids coming in and my phone doing it's own clicks it went to post without my full input. Updated all the info and added some pics and a video Inside the zip file.

EdTheHeaterMan

The Circulator pump is located in the best place on that boiler to vent air from the system. The built in air scoop of that boiler is at the hottest location and the pump is causing the lowest pressure in the system to happen in the same place.

When you get the new expansion tank, you want to add a few valves to make servicing and testing the tank easier in the future. See illustration below:

In order to get a proper air pressure reading on your diaphragm type expansion tank, you must have no water in the tank and it must be disconnected from the boiler pressure. If you have 26 PSI boiler pressure connected to that expansion tank. The water in the boiler will enter the tank and compress that air to the same pressure as the boiler pressure.

Your Expansion tank may just be low on air pressure. If that is the case you will have some water in the tank at 12 PSI when in fact you should have no water in the tank at 12 PSI pressure.