04First start

Before you start#

What happens at first start#

• Air is purged from the lines and every joint is leak-checked at operating pressure.
• The regeneration cycle set in the software is checked. The factory setting (12 h cycle, 6 h heating) is kept unless we advise otherwise.
• The outlet dew point is watched on the dew point sensor, if fitted, or on an analyser at H2 SAMPLE OUT. Until it reaches the dew point you need, the product goes to vent, not to your process.
• The start date, the operating pressure and the first dew point readings are recorded.

Acceptance#

Check the following after the start. If all four hold, treat the commissioning as accepted. Regeneration and switching can only be confirmed once the first cycle (12 h at the factory setting) has finished.

Hydrogen leaks

At operating pressure, leak-detection fluid or a hydrogen detector at the H2 IN and H2 OUT fittings and downstream joints shows no bubbles or response. You provide the fluid and the detector.

Pressure

The inlet pressure stays at 9.5 barg or above and the unit does not drop to STANDBY.

Regeneration and switching

During heating the tower reaches the regeneration temperature (150 °C) and switches after cooling to 40 °C or below. No fault stop (FS) or emergency stop (ES) alarm.

Dew point

The outlet dew point is -65 °C or below, read on the dew point sensor (option) or an analyser at H2 SAMPLE OUT.

What to write down#

What you record now becomes the baseline for judging whether performance has changed. Without a baseline you cannot tell, months later, whether regeneration has slowed.

• The date and who ran it
• Inlet and outlet pressure and the product flow
• In the first cycle, the time to reach the regeneration temperature and the highest temperature
• The outlet dew point and how long it took to get there
• How those compare with the factory acceptance test figures
• Any alarm that appeared during commissioning