B
Bill Robinson
System Greenstar Danesmoor Utility Regular 18/25 Oil fired. Danfoss pump and Drayton mid-point valve, vented indirect Gledhill Stainless cylinder and immersion heater. Installed last October and installer does not reply to my calls or emails. Boiler in garage and airing cupboard on the other side of the garage wall.
The CH and HW are working okay however a loud alternating vibration noise has started up in the last few months and lasts while hot water is being heated. I have tried to address any potential causes by placing some pipe insulation and trimming wooden shelf in airing cupboard. Also packed holes in wall temporarily with cloth around pipework but parts of the flow and return from and to boiler are still touching the wall. The noise has now a steady tone but loud enough to hear around the house still.
I have tried different speeds for the pump and at fast speed the noise is less and there is no air the system. Mid-point valve works okay.
I have found though that if the CH is on and running there is no noise with HW running as well.
If the boiler comes on for the HW only then the vibration noise begins immediately. The vibration can heard in the flow and return pipes boiler to cylinder to boiler only.
The noise is loudest in the airing cupboard where the hot water cylinder is and very slightly moving of the cylinder changes the tone of the vibration to a lower sound temporarily.
TEST
Boiler on, CH not running but on, HW running and on, vibration occurs CH stat then turned up CH started to run and vibration stops.
I suspect with my limited knowledge that the cylinder is the cause due to a defect (coils touching??) or immersion heater touching coils?? Pipe work against wall??
Thanks
The CH and HW are working okay however a loud alternating vibration noise has started up in the last few months and lasts while hot water is being heated. I have tried to address any potential causes by placing some pipe insulation and trimming wooden shelf in airing cupboard. Also packed holes in wall temporarily with cloth around pipework but parts of the flow and return from and to boiler are still touching the wall. The noise has now a steady tone but loud enough to hear around the house still.
I have tried different speeds for the pump and at fast speed the noise is less and there is no air the system. Mid-point valve works okay.
I have found though that if the CH is on and running there is no noise with HW running as well.
If the boiler comes on for the HW only then the vibration noise begins immediately. The vibration can heard in the flow and return pipes boiler to cylinder to boiler only.
The noise is loudest in the airing cupboard where the hot water cylinder is and very slightly moving of the cylinder changes the tone of the vibration to a lower sound temporarily.
TEST
Boiler on, CH not running but on, HW running and on, vibration occurs CH stat then turned up CH started to run and vibration stops.
I suspect with my limited knowledge that the cylinder is the cause due to a defect (coils touching??) or immersion heater touching coils?? Pipe work against wall??
Thanks