Filling up gravity central heating
On 06/10/2019 17:09, Andrew wrote:
You might have to manually move the 3W valve to the heating
position.
There is usually (always?) a manual lever on the valve which allows both
sides to be open and latched to facilitate filling. The latch on the
manual lever should be overriden when the system is in operation by
first switching to CH and then hot water only.
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