24s biasi no pressure

[jvhrs]

I have biasi 24s Me90, boiler is losing pressure quickly, There is no leaks or issues with radiators. Pump and air pressure switch is working fine. The diverter valve is not making pressure i suppose. The pin in diverter valve is not coming out to turn on the switch. Called a boiler repair guy who suggested that its a diverter valve. Do I need to change the diverter valve? Diverter valve makes pressure in the boiler or what? Any help will be much appreciated. Thank you.

 

[Agile]

If its losing pressure then there is a leak somewhere.

May be the pressure relief valve vent to outside.

On what basis did the boiler guy come to you and not complete the repair?

Its a very simple boiler and any normal engineer would easily diagnose the fault.

I repair diverter valves rather then replacing them. May well not be that anyway.

Tony Glazier

 

[jvhrs]

Thank you for your reply Tony.
The boiler engineer was not very professional I have to say. The amount of knowledge he had, I have almost the same kind of basic knowledge.
As per your advice, I have checked and the water is continously leaking from pressure relief valve vent to outside. Is there a way to replace this? or what shall be the next step. Thank you

 

[Agile]

It all depends on why it is leaking.

The filling loop may have been left open for example.

Tony

 

[jvhrs]

Well, I am not sure. Filling loop was shut properly at all times. But its still leaking. I dont mind changing the valve, if you suggest. Thank you

 

[Agile]

If left leaking does the pressure fall to zero?

Tony

 

[jvhrs]

I have checked again and tight the pressure release valve. Now the leaking has almost stopped (outside) and preassure gauge is showing at 1.5 or so.
The diverter valve pin is still not coming out, (diapharm is fine checked). But I have to tell you that I did open the diverter valve (whole brass section) yesterday and cleaned it and put it back. But it never worked. Flame is fine if I manually click the diverter switch.

 

[Agile]

There can be several causes of non operation of the flow switch.

Tony

 

[jvhrs]

Thank you again for your reply. Any suggested causes please?
Having checked basic issues, I have come to a conclusion that I may need to change the whole diverter valve??
I am not sure if this will help but I will update you if there is any change in operation of the boiler. I will appreciate if you have something to add please. thank you

 

[Happyplumber]

Tony why don't you write up a step by step guide on how to repair the diverter valve and also how to adjust the arm on the microswitch................

 

[jvhrs]

hi Tony,

I have changed the full brass diverter valve. Pressure is showing and everything seems to be working but same problem is there.
The pin on diverter valve is not coming out to depress the microswitch. Any other place to look into?
Thanks