Pulsafeeder PULSAlarm - Manual (Page 13)

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14. In order to fully balance and evacuate the leak detection system, the pump must now run at
normal discharge pressure for a period of about 30 minutes to one hour. This ensures that
excess barrier fluid is fully evacuated from the system.
15. Supply either process fluid, or test fluid (i.e. water) to the suction fitting and ensure that the
discharge system is configured for safe operation. The pump can be started with minimal
discharge pressure and then slowly brought up to full pressure, if the system allows for this.
16. Apply power and start the pump.
17. Slowly increase the discharge pressure to full operating pressure, and continue to run the
pump.
18. During this time, excess barrier fluid will be displaced from the system into the length of
tubing attached to the outlet side, balancing the system for proper operation. A small pen
mark on the tube can assist in observing this process visually. Once the liquid in the tube no
longer rises, the evacuation should be complete.
19. After the startup period, remove the tubing and connection from the housing body and
reinstall the pressure gauge. Use thread sealing tape as required.
20. Verify the connections to the alarm switch if they were disturbed during maintenance.
21. The pump and pressure leak-detection system are now properly prepared and ready for
normal service. During normal operation, the gauge should indicate 0 (zero) pressure.
Under certain circumstances, the system may not completely evacuate excess
barrier fluid during the procedure as outlined above. In these cases, after several
days run time, a small amount of pressure may build in the system. If this occurs,
simply loosen the pressure gauge from the switch housing and relieve a small
amount of barrier fluid, returning the system to a zero-pressure state.
Once this startup procedure is completed, the pressure leak detection system
should require no further maintenance.