Vitodens 100 pressure too low

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2 Dec 2020
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Hi all,

Our boiler is a Viessmann Vitodens 100 are we are having a radiator break down and a low pressure (0.2 bar).

I've read elsewhere on the forum that to increase the pressure you let water through the valves on the filling loop, but I can't find the filling loop on my boiler. The descriptions and photos on other threads seem to be different. Can anyone help with which valves are the correct ones here, if visible at all?

cheers
 

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It's the flexible hose in the centre of your second picture
 

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