Heatline boiler c28 overheat

[Garyc32524]

Hi guys, the boilers pressure is going up then lockout when HW runing ,CH is the same, it will go back on and same thing happened again.
so have the heat exchange plate changed, and E Vessel refilled to 1.5bar ,no improve, the driveter valve motor seems working fine.
I am not sure if this is cause by the water pump, ive open the sliver cap in the middle and turn on HW or CH, the boiler start to run but the motor is not spinning(pump motor itself is working,i took it off and tested it), the boiler make noise like there is not enough water circulation going up the main heat exchange then lockout, could it be the problems from the pcb board???or some sensors relate to this ??thanks for reading guys , please help me out

 

[ianmcd]

the boiler start to run but the motor is not spinning(pump motor itself is working,i took it off and tested it),

That does not make any sense ! them motor is working but not spinning, if it is working it is spinning it can not be working without spinning, do you mean that the pump impellor has sheared off ? and you expansion vessel pressure is too high, did you leave a drain point open when you pressurised it ?

 

[Garyc32524]

Thanks for helping, because i took the pump out and wired it to a socket and it spin, it wont spin when connect to the boiler, is it suppose to spin every time when hot water is running???

I have empty the boiler and drain water out using the red pressure release , the pressure gauga shows zero, so i should leave the pressure release open when i filled the vessel??and what bar should i fill this with ??
Thaks for your help

 

[ianmcd]

you shouldnt use the pressure releif to drain the boiler, your boiler has a drain valve you will need a short length of hose into a bucket and leave the valve open and set the EV pressure to 0.8 Bar then close the drain valve and re-pressurise the boiler, this will not sort your problem though, you will have to find out why the pump is not getting power when fitted to the boiler

 

[Garyc32524]

I will try again , thanks for the advise!!!!!its really helpful

 

[ianmcd]

http://library.plumbase.co.uk/flipbooks/RE/hecaprc28_22337_t/hecaprc28_22337_t.html#p=35

If you click on that link it shows you where the boiler drain point is, if you use the Pressure releif valve there is a good chance that it wont seal after

 

[Garyc32524]

Thanks , i found it and will give it a go tomorrow, have a good weekend!!!