Heat line boiler repressure 28a valve help?

[jojojoey]

Not sure what value to use to repressure my heat line boiler 28a. It at nearly 0 pressure on the gadge. The one I can only find online is (24a) and to repressure one with 2 black taps on the extenal loop but only have one on mine one.

There three other taps. Red Blue and yellow.

How do I do this?

 

[oldbuffer]

1. The silver coloured braided hose is your filling loop.
2. It appears to have only one valve, the black handled one on the left. This is currently closed.
3. To re-pressure:
3.1 Turn black plastic handle on filling loop valve 1/4 turn. When handle is parallel with pipe, valve is open.
3.2 Allow water in through valve until pressure gauge read 1.2 bar to 1.4 bar.
3.3 Close valve. When handle is at right angles to pipe, valve is closed.