Version
Document Title
Release Date
02
Narrow Body EL2.1 (REV. A)
–
Owner's Manual
2021-03-22
EL 2.1 -
Owner’s
Manual - Rev.02
–
Mar 2021
21
Vent Connection Guide
Following the steps outlined in the water and vent connection instructions above, connect the "O
2
Vent" port, located at the top left of the front panel to your oxygen vent outlet.
The O
2
vent line presents the most demanding line management. Please study this section carefully.
The oxygen vent line carries the produced oxygen out of the electrolyser, ca. 250 NL/h. However, due
to the hydrogen crossover inside the AEM stack (at 100% of production rate), the gas output from this
line has a maximum hydrogen concentration of 2%. Please take into consideration that operating the
electrolyser at its minimum production rate (60%) the crossover will be higher, but still remain under
the 4% threshold; we can safely state that the vent line output will not be flammable during normal
use of the device.
The remaining output comes in the form of water vapour. It is known that the electrolyte is at 55°C
at regime state of operations. The Oxygen before coming out through the vent line is saturated with
water which often condenses in the line resulting in a water output of around 10-25 mL/hr.
Warning!
Do not insert obstructions into the vent line.
This can cause irreparable
damage to your hydrogen system. Ensure that the condensed water is not
allowed to accumulate in the vent pipe and can drain out of the line safely.
Regularly check the vent line for a build-up of obstructions.
Please contact the Enapter support team for questions regarding the vent
line setup.
Attention!
The total pressure loss inside the vent line can
never exceed 0.5 bar
–
minimise pressure losses. If the backpressure inside the line builds up, the
system will go into error mode
–
however, permanent damage to the
system can occur from overpressures.
Enapter is not responsible for any damage caused to the system from
mismanaged vent line arrangements.
To connect a device, create a connection using 10 mm LDPE pipe to the port labelled "O
2
Vent". Several
units of EL2.1s can be safely connected together; simply connect the devices together as needed, via
a 10 mm vent line which should run vertically along the side of the electrolysers. When connecting
many EL2.1, an increase in diameter might be necessary. Bear in mind that if only some electrolysers
are producing hydrogen, the condensed water vapor and oxygen can flow back into the electrolytic
