I have an indirect, vented HW tank as part of vented CH system which is Y plan.
Between the flow and return to the HW tank heating coil there is a pipe Teed directly between them with a gate valve in the middle of it. The pipe looks like it is 10mm.
At first I thought this was for balancing buit that doesn't work out. Is it a bypass to increase the temperature of the water returning to the boiler, for when the HW is turned on with the tank stone cold? If so, how do I correctly set the valve?
Thanks.
Between the flow and return to the HW tank heating coil there is a pipe Teed directly between them with a gate valve in the middle of it. The pipe looks like it is 10mm.
At first I thought this was for balancing buit that doesn't work out. Is it a bypass to increase the temperature of the water returning to the boiler, for when the HW is turned on with the tank stone cold? If so, how do I correctly set the valve?
Thanks.