See if the torch has any markings. Most are Weldcraft WP-17 or WP-26 rebadged or clones.
I've had a quick look online and can't find a manual. Post a pic of the front panel and someone here will tell you whats what.
Sounds like a Weldcraft WP9.The only markings on the torch are on one side is WNI and the othere side is 9.
Sounds like a Weldcraft WP9.
For the controls:
large dial on left is current setting, 0- 150A. Middle is down slope (how long current ramps down to 0 when you release the trigger. Right control is gas post flow (how long to run gas after stopping the arc to cool the tungsten.)
Small switch under current knob is local/remote current. Switch nect to torch connector selects TIG or Arc mode.