Can't re-pressurise Vaillant Ecotec Plus 630

[Ian182]

Hi. Just had a new Vaillant Ecotec Plus 630 installed. The pressure has dropped so need to re-pressurise.

Have watched videos etc, but they all say open the two taps on the underside of the boiler. Problem is I don't have 2 taps there. Can anyone help advise what I need to do? Thanks in advance.

Here's a photo of the underside:

I've got two black taps next to the magnetic filter, and two red taps on the pipes at the bottom:

 

[ianmcd]

The 630 is a system boiler so you wont have the taps you refer to under the boiler, your pics are not showing try posting them again, you will have an external filling loop somewhere, usually but not always a silver braided hose joining two pipes

 

[Elkato531]

If the boiler has just been installed, get the installer back to show you how it is done. Making sure the customer understands how to use the system should be part of the commissioning and handover process and as occasional re-pressurising is expected, this should have been covered.