I have posted this saga over the last few months, so thought I would update with the latest info and problems.
I welcome any advice and suggestions, as I'm at the end of my tether with this.
The story thus far :
Exactly 1 year ago I had my trusty Baxi Bermuda back boiler system completely replaced by Boxt. I had no choice, back boiler had finally died....
Had Worcester-Bosch Greenstar 18Ri fitted as a pressurised S plan system with Gledhill cylinder.
7 months after installation in Sept, when the hot water only demand came on, a very loud vibrating noise could be heard coming from the cylinder.
Boxt engineer diagnosed a faulty coil within the cylinder, so the cylinder was replaced. All was fine until 3 weeks later when the noise returned, exactly the same as before.
Subsequent Boxt visits changed the HW and CH zone valves, which made no difference.
Then on the advice of Gledhill tech support, a valve was put into the cylinder coil return.
This fixed the problem and I thought all was well until yesterday when the same problem has returned again (3 weeks after the valve was put into the coil return).
It's strange that after cylinder changed and coil return valve fitted, it takes about the same time for the problem to return.
Got another Boxt engineer coming out soon but thought I'd do a bit of research of my own. Hence, this post.
Spoke to Worcester-Bosch and Gledhill Tech support who advised dialling down the coil return valve a bit to reduce the flow, to stop the coil vibration.
Also, to check if it's possible to change the external Grundfos settings somehow. I believe this pump is an ERP (Energy Reduction Pump), so not possible to manually change its speed but maybe there's some other setting that on the pump that could help? Any ideas?
Anyway, thought I'd put this out to tout any suggestions.
Many thanks in advance.
Cheers!
I welcome any advice and suggestions, as I'm at the end of my tether with this.
The story thus far :
Exactly 1 year ago I had my trusty Baxi Bermuda back boiler system completely replaced by Boxt. I had no choice, back boiler had finally died....
Had Worcester-Bosch Greenstar 18Ri fitted as a pressurised S plan system with Gledhill cylinder.
7 months after installation in Sept, when the hot water only demand came on, a very loud vibrating noise could be heard coming from the cylinder.
Boxt engineer diagnosed a faulty coil within the cylinder, so the cylinder was replaced. All was fine until 3 weeks later when the noise returned, exactly the same as before.
Subsequent Boxt visits changed the HW and CH zone valves, which made no difference.
Then on the advice of Gledhill tech support, a valve was put into the cylinder coil return.
This fixed the problem and I thought all was well until yesterday when the same problem has returned again (3 weeks after the valve was put into the coil return).
It's strange that after cylinder changed and coil return valve fitted, it takes about the same time for the problem to return.
Got another Boxt engineer coming out soon but thought I'd do a bit of research of my own. Hence, this post.
Spoke to Worcester-Bosch and Gledhill Tech support who advised dialling down the coil return valve a bit to reduce the flow, to stop the coil vibration.
Also, to check if it's possible to change the external Grundfos settings somehow. I believe this pump is an ERP (Energy Reduction Pump), so not possible to manually change its speed but maybe there's some other setting that on the pump that could help? Any ideas?
Anyway, thought I'd put this out to tout any suggestions.
Many thanks in advance.
Cheers!
