Newbie here, but I think I can help...
I have the same pump. I couldn't find instructions on the net for that exact pump, but, they are pretty much the same as a Kangaroo 324.
Basically to dose continously - Turn it on. Set your dose limit to 0 (zero), then set your infusion rate using the Inc or Dec buttons. Press Run/Hold - and off it goes.
If the dose limit is set at zero, it will run continously until the drip sensor see no drips, it then assumes that the supply is empty and stops - giving an alarm. If the dose limit is other than zero it will dose that amount then stop, giving an alarm.
Someone else posted this info but I found it useful for my needs:
3785 ml = 1 gallon
300 ml/hr * 24 hr/day = 7200 ml
7200 ml/3785 ml = 1.9 gal/day
If I recal correctly, this unit will do about 275 ml/hr. So (not doing the math) you should be close to 1.5 to 1.75 gal/day dripped 24/7.
good luck