HydroXpandHandbook

← HXD-V1 handbook

Use with HXB-V1

HXD-V1 · updated 2026-11-11

The standard 42U rack layout, sizing by HXB-V1 count, and a connection checklist.

One HXD-V1 dries the hydrogen of up to five HXB-V1 units. This chapter covers how they are combined in one rack and connected.

  • Units1 to 5 × HXB-V1
  • Max. flow2.5 Nm³/h
  • Rack42U
How to read this chapter

First timeLook at the rack layout and the sizing.

Done this beforeGo to the checklist.

On this pageStandard rack layout

Standard rack layout#

In the standard HydroXpand rack, five HXB-V1 units (6U each) sit above one HXD-V1 (6U) in a 42U rack. The dryer is at the bottom.

42U rack schematic: HXD-V1 (6U) at the bottom, five HXB-V1 units (6U each) above it, and free space at the top
Figure 9-1 Standard 42U rack layout · schematic
  • The HXB-V1 hydrogen outlet connects straight to H2 IN of the dryer.
  • Oxygen and vent lines of the HXB-V1 units are separate from the dryer lines. Do not join them.
  • Each unit has its own power cord. Plan one supply circuit per unit, as given in the HXB-V1 handbook and in this handbook.
  • Keep the front and rear of the rack free for access and air flow.

Sizing#

HXB-V1 unitsNote
1 to 5One HXD-V1 covers the full range up to 2.5 Nm³/h
More than 5Use one HXD-V1 per group of up to five HXB-V1 units

Checklist#

  • The HXB-V1 hydrogen outlet is connected to H2 IN of the dryer.
  • All vents, from the HXB-V1 units and the dryer, run to a safe place outdoors without valves.
  • The dryer is switched on before the HXB-V1 units start, and the HXB-V1 units are stopped before the dryer is switched off.

What this chapter is based on

Resource library →

TroubleshootingA find-by-symptom table, cause-by-cause checks for dew point, pressure, regeneration temperature and drains, the control app's alarm list (ES, FS, WA) and what to send us.
Was this page helpful?

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.