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Fig. 6.5
6.
Now remove the cover on the bottom valve using a 19 mm open-ended spanner. Open the valve
by turning it counter-clockwise as far as it will go using a 5 mm Allen key. The valve is now open. lf
the valve is not opened fully, the system may malfunction and suffer damage. Screw the cover back
on to the bottom valve and tighten it well to ensure that it is properly sealed. See Fig.6.6.
Fig. 6.6
Important! The conical ring on the valve has an important sealing function together with the sealing seat
in the caps. Ensure that you do not damage the cone and that you keep the cap free of dirt and dust.
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