Hi, My central heating system has the honeywell sundial y plan setup with a 3 position diverter valve.
The valve is automatic but it also has a manual lever. But the lever has no markings/writing on it to tell you which way it should be left?
Any ideas?
Ta.
The valve is automatic but it also has a manual lever. But the lever has no markings/writing on it to tell you which way it should be left?
Any ideas?
Ta.