Enapter EL User manual

Owner’s Manual
Electrolyser
Rev. 00 –September 2021

Version
Document Title
Release Date
00
EL –Owner’s Manual
2021-09-22
EL –Owner’s Manual – Rev.00 –September 2021 I
CHANGE HISTORY
Rev.
Status
Date
Revision memo
Created/changed by
00
IFP
21/09/2021
First approved version
Philipp Endres

Version
Document Title
Release Date
00
EL –Owner’s Manual
2021-09-22
EL –Owner’s Manual – Rev.00 –September 2021 II
PREFACE
Thank you for choosing Enapter. Please study this manual carefully before unpacking, installing, and
operating the device.
If you have any further questions, please contact the Enapter customer support team. Quote the
device serial number and hardware number on the back of the device to help identifying your product
quickly.
Enapter Srl
Headquarter: Via di Lavoria 56/G
56040 Crespina (PI) –Italy
T.: [phone]
E.: [email protected]om
Website: www.enapter.com
VAT no. 13404981006
Scope of the document
This manual provides information needed to carry out the installation and usage of your Enapter
device safely and as intended.
Keep this document in a safe place and readily available. Always follow its instructions. It is the
operator’s responsibility to ensure that an installed device is always in proper conditions. Please
observe any additional local requirements applicable to the installation and operation of hydrogen
devices.
Approved use
This device must only be operated for its intended purpose, according to the specifications and
instructions provided in this document.
Observance of this document is part of “normal use”.
Danger of injury due to improper use!
Improper use of the device can result in serious injuries and damage to the
environment.
•Always use the device according to the specifications described in this
document. Ensure that the manual is always accessible.
•Make sure you have read and understood this document in its
entirety.
•Comply with all safety instructions and warnings.
•Store the manual and other documentation in a safe and accessible
place and pass them on to future owners and operators of the device.
•Comply with all local regulations.
•Enapter is not guaranteeing efficiency, safety, and functionality in
case of modifications not described in this document.
•Enapter is not responsible for any damage caused by the device or to
the device based on wrong operation or setup.

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Document Title
Release Date
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EL –Owner’s Manual
2021-09-22
EL –Owner’s Manual – Rev.00 –September 2021 III
Terms
The following terms are used in this document:
•Device: Device means the unit, including its hardware and software as well as contained
materials and substances. It also includes directly attached tubes, pipes, and other equipment
from Enapter if not stated differently.
•System: System means the combination of devices, tubes, pipes and equipment from Enapter
and other manufacturers which are connected physically, logically or in any other way to
produce, store, use, transfer or convert hydrogen and related substances.
•Operator: The operator is the responsible person in charge who operates, installs, connects,
maintains, and/or owns the device, its subcomponents, and additional components. To
simplify reading, this document only refers to the operator to distinguish from Enapter but
may also include the user, customer, client, owner, installer, instructor, system integrator or
persons who are responsible for a safe operation of the device.

Version
Document Title
Release Date
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EL –Owner’s Manual
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EL –Owner’s Manual – Rev.00 –September 2021 IV
Table of Contents
Change history....................................................................................................................... I
Preface .................................................................................................................................II
Overview of the Electrolyser................................................................................................. 1
Safety instructions................................................................................................................ 3
List of Hazards............................................................................................................................... 6
Installation of the Electrolyser............................................................................................ 10
Unpacking................................................................................................................................... 10
Tools, material and accessories required .................................................................................... 10
Implementing System Safety ...................................................................................................... 11
Instructions for connecting stainless steel tubes ........................................................................ 12
Instructions for connecting plastic tubes .................................................................................... 15
Electrical Connection Guide (POWER)......................................................................................... 23
Initial operation of the electrolyser ............................................................................................ 26
Control, Functions and System States of the Electrolyser ................................................... 29
Enapter Monitoring Tools................................................................................................... 32
Maintenance of the Electrolyser......................................................................................... 33
Appendix ............................................................................................................................ 35
Appendix I. Hydrogen Leak Testing.........................................................................................................35
Appendix II. Preparing the electrolyte solution.......................................................................................36
Appendix III. Draining the electrolyser....................................................................................................38
Appendix IV. LED States..........................................................................................................................39
Appendix V. Error Codes.........................................................................................................................39

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EL –Owner’s Manual – Rev.00 –September 2021 1
OVERVIEW OF THE ELECTROLYSER
Enapter’s patented anion exchange membrane (AEM) electrolyser is a standardised, stackable, and
flexible device to produce hydrogen. The modular, easily maintainable design –paired with advanced
software integration –allows set up in minutes and remote control and management.
Specifications
The specifications of the electrolyser can be found in the datasheet. It can be downloaded here:
Datasheet of the electrolyser.
Front Panel
EL2.1 LC front side
EL2.1 NB DC front side
The front panel of the electrolyser includes all physical connections of the device.
1. H2O In –please refer to the section Water Inlet Connection Guide
•Push-fit female bulkhead connector (8mm outer diameter pipes)
•Input: Filtered water input with a conductivity < 20 µS/cm at 25°C, input pressure
between 1 and 4 bar
2. O2Vent –please refer to the Vent Connection Guide
•Push-fit female bulkhead connector (10mm outer diameter pipes)
•Output: O2with water vapour and traces of H2
3. Cooling Water IN/OUT –please refer to the Cooling Loop Connection Guide
•Only available in the liquid cooled electrolysers (LC versions)
•Push-fit female bulkhead connector (10mm outer diameter pipes)
•Input/Output: cooling water to cool down the device
4. H2Out –please refer to the Hydrogen Outlet Connection Guide
•¼" double ferrule Swagelok tube fitting bulkhead (SS-400-61)
•Output: 500 NL/hr of H2, up to 35 barg
5. H2Purge –please refer to the Purge Connection Guide
•¼" double ferrule Swagelok tube fitting bulkhead (SS-400-61)
•Output: Periodical purge of up to 20 NL, H2and water

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6. Fill / Drain Port
•CPC quick connector 10 mm
•Only used during routine maintenance for filling the electrolyte into the device or for
draining and preparing it for transport.
7. Breaker –please refer to the Electrical Connection Guide
•Integrated magnetothermal circuit breaker to protect the electrolyser from
overcurrent and short-circuits.
8. Power –please refer to the Electrical Connection Guide
9. Dry Contacts –please refer to the Dry Contact Connection Guide
10. Ethernet –Connection to access external Modbus control features of the electrolyser. Find
more in the chapter below.
11. ANT. –Antenna port SMA male
•The device can be connected to the local network via Bluetooth and Wi-Fi, enabling
real-time updates and monitoring for the operator via the Enapter App and cloud. A
miniature antenna can be attached to this port to increase the amplification.
•Do not touch the port when the device is powered on!
12. Start/Stop –please refer to the Manual Start/Stop section below
•Manual start and stop button to start and stop the device
13. LEDs –please refer to the Appendix IV
•Status LEDs to show device status
14. Air Inlets –please refer to the Routine Maintenance
Back Panel
EL2.1 back side
EL2.1 NB DC back side
The back panel of the device is used to blow out warm air. Please leave at least 30 cm space behind
the module to allow for adequate airflow. Never obstruct the ventilation openings!

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EL –Owner’s Manual – Rev.00 –September 2021 3
SAFETY INSTRUCTIONS
Warnings and Hazards
The following terms and symbols are used in this manual to indicate important text passages which
must be given particular attention:
Warns of fatal/serious injury
Warns of injury
Warns of physical damage to the product
Do not open or dismantle
Keep away from sources of heat and ignition.
No naked flames
No smoking
Minimum two persons required to handle the item
Wear Personal Protective Equipment
Wear hearing protection
General safety
The operator must be aware of the following:
1. The device is not intended to be used in a potentially explosive area
2. Enapter is not responsible for improper use:
•Caused by wrong inputs
•Caused by wrong input pressures
•Caused by improper mounting or tubing (e.g. leaking gas connections)
•Caused by connecting the wrong power supply (e.g. wrong voltage)
•Caused by improper installation
3. Regarding design and installation, the operator must follow Enapter’s installation rules, and
ensure full compliance with local safety guidelines and regulations.
4. It is the operator’s responsibility to regularly check and maintain all outlet lines, as well as to
keep the lines free of ice or other obstructions.
5. It is the operator’s responsibility to regularly check and clean the air intakes and outlets of
the device, as well as to keep the air inlets/outlets free of obstructions.

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EL –Owner’s Manual – Rev.00 –September 2021 4
The following rules should always be observed:
1. Keep the work area clean. Clutter can create hazards around the device. Keep the work area
well illuminated.
2. Do not use the device in explosive atmospheres. Do not use the device near flammable
substances.
3. Handle the power supply cable with care. Do not pull the electric cable to disconnect it from
the plug without removing power from it first. Keep the electric cable away from heat, oil,
water, and sharp edges.
4. Protect yourself from electric shocks. Avoid any contact with earthingsurfaces.
5. Never expose the device to rain or very damp conditions.
6. Keep children and people without explicit knowledge of the device and its function away at
a safe distance.
7. Never operate the device in confined spaces without additional safety infrastructures, such
as active ventilation or hydrogen detection systems.
8. Always protect yourself:
a. Wear protective goggles and nitrile gloves when handling the electrolyte solution.
b. Wear ear muffs or plugs in noisy areas.
c. Wear gloves when handling the device.
d. Wear appropriate footwear when handling the device.
e. Use lifting aids if available when lifting the device. Never lift the device alone. Know
your local and site-specific health and safety rules and act accordingly.
9. Always disconnect the device from electricity before cleaning, disassembly, and transport.
10. Only use the device in the way and for the purposes mentioned in this manual. If the device
is employed for uses other than what is specified in this manual, unforeseen hazards may
occur.
11. Use the handles when lifting and moving the device.
12. Never attempt to repair the device by yourself. The device must be repaired only by qualified
specialists who use original spare parts.
13. Any maintenance activity, excluding the ones listed in the routine maintenance and
installation sections, are only allowed to be performed by authorized trained technicians!
14. Any person working on the device must be familiar with the hazards and risks associated with
installing, commissioning, and running the device and attached devices.
15. Do not store the device at temperatures below 1°C.

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Release Date
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EL –Owner’s Manual
2021-09-22
EL –Owner’s Manual – Rev.00 –September 2021 5
Additional safety for the electrolyser
The following rules should always be observed. It is the operator’s responsibility to ensure that every
person, working with the device is following these rules:
1. Do not attach filled tanks or other equipment with pressures higher than the device’s
maximum outlet pressure to the H2outlet of the device.
2. Do not provide water which does not meet the minimum purity requirements.
3. Do not provide water with a pressure higher than the maximum allowed pressure.
4. Make sure that the H2purge line and the O2 vent line are never obstructed.
Additional safety for the dryer
The following rules should always be observed. It is the operator’s responsibility to ensure that every
person working with the device is following these rules:
1. Do not attach filled tanks or other equipment with pressures higher than the device’s
maximum outlet pressure to the H2outlet of the device.
2. Do not attach hydrogen sources other than the electrolysers specified by Enapter.
3. Make sure that the H2purge line is never obstructed.