Boiler issues not firing after refill

[Notagainpike]

Valve and pump arrangement

 

[Notagainpike]

Am i being thick....but how are you suppose to get the air from the exchanger....would be so easy if there was a bleed off there...

 

[fowlerboi]

Right so its not open vented.

Typically sealed systems are incredibly easy to get air locks out of.

Just to be sure, that's an old photo right? As your pump and valves aren't wired in.

Need a photo above the boiler of pipework arrangement too and one inside to tell you where to vent the heat exchanger, surprised though with a sealed system the pump won't clear that.

Check what speed your pump is set too and then turn it down to 1 which is the slowest, this may help prevent cavitation until the air clears

 

[Notagainpike]

Right so its not open vented.

Typically sealed systems are incredibly easy to get air locks out of.

Just to be sure, that's an old photo right? As your pump and valves aren't wired in.

Need a photo above the boiler of pipework arrangement too and one inside to tell you where to vent the heat exchanger, surprised though with a sealed system the pump won't clear that.

Check what speed your pump is set too and then turn it down to 1 which is the slowest, this may help prevent cavitation until the air clears

 

[Notagainpike]

Heat exchanger is red hot again, but no pipework is

 

[fowlerboi]

check the top of the photo. You're missing an air vent. You basically have a massive high spot where air is trapped

 

[Vip1969]

Try this. No guarantee that it will work but you have few options. Completely lose the bottom pump valve. Slowly loosen the top pump valve's compression nut, water / air will bleed out and may be enough to release the air lock.

 

[Vip1969]

meant to say close the bottom pump valve.

 

[ShaunCorbs]

Close all but one rad closest to the boiler upstairs turn ch on and ramp the pump upto 3 if it’s not already on it and let it run

 

[Notagainpike]

check the top of the photo. You're missing an air vent. You basically have a massive high spot where air is trapped

I did wander if there should of been something here....esp as the old system had some sort of weird mixing thing!