Hi, for the second time in as many months another of the 2 port motorised valves on my CH/HW system has failed. This time it's the one controlling the supply of hot water to the HW cylinder.
It appears the actuator head has failed but I can't seem to find any similar replacement model, possibly because it's over 6 years old. The info reads; orkli 60520604. I can find models with different numbers but I've read they are not compatible with earlier versions.
I'm considering changing the valve to a Honeywell (like the CH valve that was replace a couple of months ago). However, if possible I would like to avoid having to drain down most of the central heating system. Here's a photo of my setup, the boiler is above the photo to the right and so the two vertical pipes are the flow and return:
If I were to close the magnaclean valves on the return I think this would isolate the HW flow and return and the boiler. I was thinking of draining down the boiler and then disconnecting the HW valve. I realise there will still be water in the flow and return pipes identified above, but this should prevent the water from the rest of the CH system from being drained.
It will probably be messy!
My main concern is refilling the boiler and the pipes that have just been emptied as I'm guessing there will be an air lock that I won't be able to easily get rid of. I did consider fitting a drain valve to the bottom of the flow valve that runs horizontally across the bottom of the photo, which would help.
Any thoughts on my idea for partially draining the system?
Thanks.
It appears the actuator head has failed but I can't seem to find any similar replacement model, possibly because it's over 6 years old. The info reads; orkli 60520604. I can find models with different numbers but I've read they are not compatible with earlier versions.
I'm considering changing the valve to a Honeywell (like the CH valve that was replace a couple of months ago). However, if possible I would like to avoid having to drain down most of the central heating system. Here's a photo of my setup, the boiler is above the photo to the right and so the two vertical pipes are the flow and return:
If I were to close the magnaclean valves on the return I think this would isolate the HW flow and return and the boiler. I was thinking of draining down the boiler and then disconnecting the HW valve. I realise there will still be water in the flow and return pipes identified above, but this should prevent the water from the rest of the CH system from being drained.
It will probably be messy!
My main concern is refilling the boiler and the pipes that have just been emptied as I'm guessing there will be an air lock that I won't be able to easily get rid of. I did consider fitting a drain valve to the bottom of the flow valve that runs horizontally across the bottom of the photo, which would help.
Any thoughts on my idea for partially draining the system?
Thanks.