The sequence for taking the stack out of the system, whether for a long stand-down, a move, or shipping it in for service.
- WhoQualified personnel only
- OrderStop, depressurise, drain, seal
- Storage5 °C or above at all times
How to read this chapter
First timeDo the three sections in order. Never open a line that is still energised or still pressurised.
Done this beforeThe draining procedure and the storage conditions are what you need.
On this pageSafe shutdown and electrical disconnection
Safe shutdown and electrical disconnection
- Reduce the current to 0 A and stop electrolysis.
- Turn off the DC output, then the external disconnect or breaker.
- Circulate to cool it down, then turn off the pump and temperature control.
- Do not disconnect the DC cables straight away.
- Allow time for the charge to dissipate and measure the terminal voltage before disconnecting with tools.
Depressurise the gas paths
Drain the electrolyte and seal it
- Place labelled, alkali-compatible containers under the discharge point.
- Reconfigure the pump so it does not draw from the tank again, and give air a way into the electrolyte inlet.
- Pump the electrolyte out of the stack through the outlet.
- Drain the remainder the way we advise.
- Do not tilt it by hand to drain it; its weight makes that dangerous. Ask us about the draining method beforehand.
- Disconnect and cap.
- Disconnect the external lines from the electrolyte inlet, the oxygen and electrolyte outlet and the hydrogen outlet, and cap or plug every port.
- Disconnect the DC cables and protect the terminals from contact and moisture.
- Confirm every port is securely capped and there is no active leakage.
What this chapter is based on
- HXS-30 datasheetPDF · 502 KB
- HXS-30 exterior STEP modelOn request
Ask the engineer who built it
If your case is not covered here, send us the operating condition and what you observed. The engineer who designed the system answers directly.