Hi my new press has shown up and i'm very excited

!
I wonder if any one could give me any hints on the whole temp and pressure thing though- as I've NO idea!
I'm looking to put transfers onto Gildan cotton t-shirts.
I dont have a digital pressure readout so maybe some one could tell me how much ..err..screwing i need to do!
Any hints and tips would be great too!
Thanks in advance

Mark.