The valve may be plumbed in at any angle but must not. Class I devices and must be connected to a suitable earth. Typical Multi-Manifold Schematic Wiring Diagram Using M1- BG Actuators.
Have a look on the Honeywell web site, lot's of info. If so that would explain the additional zone valve. I can understand the colours and what they should be doing from the various internet sites, . Feb 2013Honeywell Zone ValvespostsOct 2012Wiring of boiler valves with volt free contactspostsMar 2011Two port central heating valve for underfloor heating.
SimilarV4043H Motorised Zone Valve. Before fitting the valve, read through the plumbing and wiring. Feb 20- S Plan Twin Zone Central Heating Wiring Diagram.
The flexible cable from the valve should be wired into a suitable wiring . For a port zone valve is as follows. Grey = permanent live feed to valve from wiring centre. Brown = switched live into valve from .
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