H.Koenig BW1880 Manual De Utilización página 13

Fahrenheit and Celsius.
Figure 20
9. Adjust the CO2 pressure regulator knob to "+" position, to pour the
beer out by pulling down the tap mechanism about 45°, and you can
adjust the pressure regulator knob to control the beer flow rate and
beer bubble; (Figure 13)
Note: Clean the glass before pouring beer out; if the beer or beer
cup/glass is in high temperature or the beer is not cool enough, there
are many bubbles when pouring beer out;
10. When taping the beer, lean your beer glass against the pouring
spout and slowly straighten it up with the beer rising, then open the
tap mechanism completely to avoid much bubble; It is advisable to
pour half-glass, make a short pause before continuing the rest.
NOTES: Never immerse the pouring spout into the beer glass to
avoid much bubble; Remember to lock the tap after finishing pouring.
11. It is normal to have more bubbles when pouring the first 3 cup of
beer.
12. There will be a sharp and high-speed jet when pouring the last
cup of beer from keg.
Please adjust the CO2 pressure regulation knob to "-" position to
close the CO2 supplying and save the CO2.