VT stands for valve test. It sends out a constant 24 Volts 100% of the time that the controller is plugged in. Most of you will never use it, I barely ever use it. MV is for master valve. I've used this option when I couldn't find a leaking valve. I installed a standard valve on the water main by the back flow, and wired it up. That leaking valve still leaks, *but* with the master valve stopping water flow, it only leaks when the system is running.
I have New one and I have question ABOUT (VT) MV COM
What about (VT) ?
Nothing wrote in the catalog about (VT)
VT stands for valve test. It sends out a constant 24 Volts 100% of the time that the controller is plugged in. Most of you will never use it, I barely ever use it.
MV is for master valve. I've used this option when I couldn't find a leaking valve. I installed a standard valve on the water main by the back flow, and wired it up. That leaking valve still leaks, *but* with the master valve stopping water flow, it only leaks when the system is running.