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VR33 Install on eco tec plus

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Discuss VR33 Install on eco tec plus in the DIY Plumbing Forum area at PlumbersForums.net

boxer01

boxer01

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Hi
I am new to this forum and would like some advice on fitting a vr33 open therm module on a vaillant ecotec plus controlled by a nest 3rd gen. It's a basic heating system with no hot water control.
I am having difficulty finding an installation guide for the vr33, I have read that it plugs into x31 on main pcb and some say you plug into x32, has anyone fitted the vr33 on an ecotec plus.
 

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