Document P/N:
2A44778_SVC_MNL
Release Date:
07/29/2019
Revision: 1.0
10 of 23
2.4 Gauges
2.4.1 Wellhead Pressure
The wellhead pressure gauge has three indicator bands: red, yellow, and green. The green band is the region
between 0 psi and the
Reset Pressure
. The yellow band is between the
Reset Pressure
and the
Pop-Off Setpoint
.
The red band indicates the pop-off zone. When the Wellhead Pressure enters the red band, a pop-off event occurs.
Modifying the reset point or pop-off set point updates the wellhead gauge bands.
2.4.2 Bottle Pressure
The bottle pressure gauge indicates the pressure after the static pressure regulator inside the valve
box. The regulator
is set to 1000 psi at the factory and is not adjustable. If the bottle pressure falls below 1000 psi, it
may indicate that
the supply tank has dropped below 1000 psi and should be switched out. Low pressure may cause
resetting the valve
to be very slow or prevent the system from reaching operational pressure.
2.5 Indicators
2.5.1 Manual Dump
When either a software switch or a physical switch is in the
Manual Dump
position, the
Manual Dump
indicator flashes red. In order to resume operating, return all switches to the
Auto
position.
2.5.2 Pop-off Active
When the valve is dumped due to a pop-off event, the
Pop-Off Active
indicator flashes red. The valve
continues venting until the reset conditions are met.
2.5.3 Dome Ready
When the dome pressure is suitably close to its given control set point, the
Dome Ready
lamp lights,
indicating that the system is ready for operation.
