thing to remember is that if your sport is PL, then the sled work is GPP, it should add to your lifting and not take away from it.
the great Louis Simmons told me that if you are huffing and sweating during your warm ups, you are out of shape.
I have no idea on how much or little sled work you should do.
Off the top of my head, start doing 2 times a week, 4-6 trips, either on your leg days as a warm up or finisher, or the day after squats/deads as a recovery tool.
see how that feels, and add a little more until you stop noticing positive effects.