Hi Ian,
If you manage to see this, i have wired all this up yesterday i have the one with a charger built in and its coming chg on the display when the engine is running which is great as i wanted to make sure it this was working before anything else.
haven't had time to do anything else yet so i am going to calibrate it tomorrow i have watched the auto cal video online it says connect your water fed pole up. Im using 60 meters of 6mm microbore hose is it best to fully extend the hose out 60 meters as well? before auto calibrating the controller.
Personally, I would calibrate it with the hose fully wound on the reel. It needs a little more pressure this way and its not always you pull all your hose out off the reel.
To a point Spruce is right there is no need to pull all the hose off the reel when running the auto cal. I would suggest that you attach your longest pole and take some hose of the reel this is to allow a little expansion in the hose wall.
So why calibrate the control to a pump?
What we are doing is telling the control what the maximum pressure the system normally operates at. To get a good flow at the brush head the system is probably running between 40 - 70 PSI. So the control knows that the normal max level is 70 PSI. When a user stops the water flow the pump will attempt to push against the restriction increasing the pressure above 70 PSI the pump see,s this sudden rise and stops the pump. This is what we refer to as DEAD END.
During this DE (flow stopped period) the controller periodically retests the pressure at the pump. When the restriction is removed the pressure falls back below the 70PSI maximum and the control restarts the pump at the preset flow. Hence the need to set the calibration to the longest pole which requires the greater pressure.
The control is designed to stop the pump before the pump pressure switch activates where the water flow has been stopped.
I feel there is a need to give a little more detail in some areas as understanding why what where when and how could be very useful.
Ian