Mooney FlowMax HP Regulator Instruction Manual | 11
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Checking Stand-by Monitor Operation
1. With flow going through the station, slowly increase the setting
of the operating regulator. When the pressure reaches the
setpoint of the monitor regulator, the monitor should take control
and the interstage pressure should decrease to approximately
5-10 psi (0.34-0.68 bar) above the outlet pressure.
2. Reduce the setting of the operating regulator back to the
required outlet pressure. The interstage pressure should
increase to 5-10 psi (0.34-0.68 bar) below the inlet pressure as
the operating regulator regains control (at low flows).
Working Monitor
1. Purge any pressure in the station.
2. Set pilots #1 and #2 to a setting above the desired set points.
3. Set the pilot (#3) at a zero setting.
4. Slowly open the inlet block valve to station. The second stage regulator should remain closed as a result of the pilot #3 being set to zero.
5. Fully open any hand valve(s) in the control line(s) and the pilot supply line.
6. Open an outlet block valve or vent to allow flow through the station.
7. Increase the setting of the second stage regulator, pilot (#3) to the desired monitor over-ride pressure set point of the station.
8. Lower the setpoint of the first stage regulator pilot (#1) to the desired interstage pressure setting. The first stage regulator should begin
to control the interstage pressure at the setpoint of Pilot #1.
9. Lower the setpoint of pilot #2 to take control of the system (a pressure that will be slightly lower than the final monitor over-ride pressure).
10. Raise the setpoint of pilot #3 to a maximum setting.
11. Raise the setpoint of pilot #2 to maintain the exact monitor over-ride pressure set point.
12. Lower pilot #3 to the desired station outlet pressure.
