Hi all, I'll try to keep this as brief as possible and thanks to everyone in advance that can offer advice. I have a Worcester Bosch greenstar Junior 28i combi boiler fitted mid 2011. It's leaking from the 'unused port' situated just on top of/behind the flow turbine on the return manifold (on the right side of the pump when looking at at it) . Luckily the water is running down the back and not forward onto the diverter valve or any other electrics. I have ordered a new return manifold which appears to include new O rings etc and have silicone grease.
The service manual says to 'ensure the appliance is fully drained', remove the syphon and then remove the hydraulic block. I can see that once the hydraulic block is out it would just be remove/refit the return manifold from the block and then put everything back.
It all seems straight-forward enough but I just wanted to confirm the correct procedure for fully draining the appliance prior to removing the syphon and hydraulic block. Is it a simple case of closing all the isolator valves and draining the system using the drain port (which is part of the assembly being replaced) or is there more to it? I've searched for guides but the only results I've found are general guides on how to drain radiators etc. Is there anything else that needs to be done beforehand (besides the other obvious this like turning off power and gas etc)?
The service manual says to 'ensure the appliance is fully drained', remove the syphon and then remove the hydraulic block. I can see that once the hydraulic block is out it would just be remove/refit the return manifold from the block and then put everything back.
It all seems straight-forward enough but I just wanted to confirm the correct procedure for fully draining the appliance prior to removing the syphon and hydraulic block. Is it a simple case of closing all the isolator valves and draining the system using the drain port (which is part of the assembly being replaced) or is there more to it? I've searched for guides but the only results I've found are general guides on how to drain radiators etc. Is there anything else that needs to be done beforehand (besides the other obvious this like turning off power and gas etc)?