Thanks for your reply!
I have a 20lbs propane tank, using a type 1 regulator and 3/8 adapter hose that I got from Lowes. After a few attempts today, I was able to ignite and see flames light up but would turn off right away. So I went back to Lowes, asking for another setup as I thought that maybe there is not enough gas going to the griddle...they were clueless. I tried local bbq stores and same thing. I even tried a local creperie that use these griddles (but with natural gas) and they didn't know how to help...
The strange part is that the hose doesn't twist all the way in to the griddle gas input: it barely gets to 1 full turn (not sure if I'm making any sense lol); that's why I'm thinking there's not enought gas getting to it.
As for the installation, no one but my husband and I have attempted to do it; we figured that we just need to get the hose and connect it from the propane tank to the griddle. Does it require a special technician to install such thing?
I really cannot find anywhere what the correct accessories to use with this griddle (regulator, hose,...), I'll call the French again tonight around midnight to try to figure it out. Sadly, they ship these equipment without much instructions. The manual start with "After installation,..."
Thank you very much for your help!