Hi everyone,
I’m building a central heating manifold with 4 heating zones (27 rads split into 4 zones) and 1 HWT zone (and a 6th spare). I have an oil boiler which is controlled by each zones room stat as well as a back boiler that has all been professionally installed and plumbed in. The two systems are currently plumbed together however only three zones have zone valves which means when the oil boiler tries to heat ZV2, it also heats Zone 1 (no zone valve) and the hot water tank (no zone valve), not ideal. To solve this I plan to add a zone valve to zone 1, and plumb the back boiler flow to bypass the zone vale so it remains unrestricted. I will also add a ZV to control the hwt. My main question is around placement of the non return valves and if there are other things I haven’t thought of yet that should be considered. Thanks for any advice or tips. Attaching a picture of the design
I’m building a central heating manifold with 4 heating zones (27 rads split into 4 zones) and 1 HWT zone (and a 6th spare). I have an oil boiler which is controlled by each zones room stat as well as a back boiler that has all been professionally installed and plumbed in. The two systems are currently plumbed together however only three zones have zone valves which means when the oil boiler tries to heat ZV2, it also heats Zone 1 (no zone valve) and the hot water tank (no zone valve), not ideal. To solve this I plan to add a zone valve to zone 1, and plumb the back boiler flow to bypass the zone vale so it remains unrestricted. I will also add a ZV to control the hwt. My main question is around placement of the non return valves and if there are other things I haven’t thought of yet that should be considered. Thanks for any advice or tips. Attaching a picture of the design
