the bosch you have is cold fill only,as most bosch are,so just turn off the hot tap and ignore,
mm
May 2011
connect the cold to the cold inlet valve.If there is a hot valve as well on the machine and you do high temp washes you can put a 'Y' connector on the cold tap and fit 2 hoses to the machine (hot and cold inlet valves).As for flooding I don't understand??