Hunter HPV value manual bleed
I think this is a simple newbie question: I have some Hunter HPV values (with flow-control) and I am trying to determine how to "manually" open/trigger them. The valves say they have an internal bleed feature, but how to I trigger it? There is a flow-control knob on the top, but I think this is unrelated as this just controls the the flow, not the activation. Is this correct? The solenoid has directional markings on the top that says "on/off, 1/4 turn". What does this 1/4 turn do and is it related?
Thanks,
-Jeremy