I'll assume that Liquid has them under Settings>Sounds>Quiet Hours as well?
It should be as easy as: Enable, set your hours, check the boxes for the things you want disabled, done.
There's no trick to it, and I've never seen it NOT work on a ROM yet, although I've never run Liquid. The only thing it won't do is silence notifications where the app uses the wrong API and uses a ringtone vs a notification tone.
Hammerhead / Flo / Mako / Maguro / Odroid U2