H.Koenig BW1880 Manuel D'utilisation page 16

the beer keg each time. Please refer to the below contents about
cleaning.
When you take out the beer connector
and CO2 connector, please press the
white button down
Figure 26
E. TO CHAGE A NEW CO2 CARTRIDGE (No need for Heineken
keg)
Please change the CO2 cartridge if can't pour beer out when the
CO2 pressure knob is at "on" position and has beer in keg
1. When turn the CO2 pressure knob to "-" position, to close the
CO2 supplying.
2. Open the top cover, loose the cartridge sheath, and take out the
empty CO2 cartridge.
Insert a new 16g CO2 cartridge in the sheath, and screw the sheath
tightly until you will hear a "Click", which indicates that the cartridge
seal has been pierced and the CO2 gas can flow into the keg freely.
Make us the bottle sheath is fixed tightly to avoid the CO2 leakage.
Then put CO2 bottle sheath into the top cover.
3. Close the top cover of beer cooler;
4. Turn the CO2 pressure knob to "+" position to turn on the CO2
supply, and it is ready to pour beer out.
Figure 27