yeah i understand that, i've told them repairs are extra i.e. parts and labor. I'm just a little confused on what to charge for the startup on I.E. turning on the system checking each zone and programing clock
Then tell them it is all time and material. Whatever your rate is, plus parts.
A general question like yours is like asking "how much does a car cost?" There are too many variables. No way to know if the turn on will take 30 minutes, or 6 hours. A large complex might take all day to find the POC, pressure up to the BFP, slowly pressurize the mainline (and who knows if the last guy left drain valves open or where they are - so then you're hunting for those), find each controller, then turn on and evaluate each zone. Are you using a remote or walking back and forth to the controller each time you want to advance the zone? Like I said, it could be 4 zones, and it could be 400. Each zone could have 4 heads, and they may have 40 heads.
So there is no way to give a number other than T&M until you have worked on the system before. And even then, you figure it will take xxx number of hours times your hourly rate.