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hoe to wire in a Randall hs a3 motorised valve?

can any one supply me with a wiring diagram for the above valve please as i can only have either hot water or central heating as ibelieve the valve which is new has been wired in incorrectly
michael heppenstall, May 2008
blue-neutral
green/yellow-earth
white-room stat calling
grey-cylinder stat satisfied
orange-supply to pump and boiler

generally anyway depends on the wiring person but thats general practice

iain, May 2008