There could be a few setups for the pressure top up, but usually, there is a filling loop. The filling loop usually has 2 valves with black levers and a flexible silver braded pipe connecting them (typically 15mm in diameter). You need to open one first and then open the next slightly to start topping up. The pressure should be 1.5 bar in the system. I hope that helps.
how to increase pressure for this boiler? thank you
There could be a few setups for the pressure top up, but usually, there is a filling loop. The filling loop usually has 2 valves with black levers and a flexible silver braded pipe connecting them (typically 15mm in diameter). You need to open one first and then open the next slightly to start topping up. The pressure should be 1.5 bar in the system. I hope that helps.