Enapter Electrolyser User manual

Owner’s Manual
Electrolyser
Rev. 04 –March 2022

VERSION
DOCUMENT TITLE
RELEASE DATE
04
EL –Owner’s Manual
2022-04-29
EL –Owner’s Manual – Rev.04 –April 2022I
This is a draft manual, technical specifications are subject to change
CHANGE HISTORY
A black triangle on the left side of the page indicates changes since the last revision. The number inside
the triangle indicates the revision which includes the changes the first time.
Rev.
Status
Date
Revision memo
Created/changed by
00
IFP
21/09/2021
First approved version
Philipp Endres
01
IFP
19/10/2021
Updated Purge, Vent line and LC circuit, DryCon
Philipp Endres
02
IFP
10/11/2021
Corrected Dry Con Chapter
Philipp Endres
03
IFP
20/01/2022
Added
-device specifications (1.1),
-updated the recommended coolant operation
range diagram (4.5.3)
-recommended device operation (5.1)
-how to update device (7.1),
-visual update all over the document
Philipp Endres
04
IFC
29/04/2022
Adapted document to EL4.0
Philipp Endres

VERSION
DOCUMENT TITLE
RELEASE DATE
04
EL –Owner’s Manual
2022-04-29
EL –Owner’s Manual – Rev.04 –April 2022II
This is a draft manual, technical specifications are subject to change
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.: [e-mail]
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”.
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.

VERSION
DOCUMENT TITLE
RELEASE DATE
04
EL –Owner’s Manual
2022-04-29
EL –Owner’s Manual – Rev.04 –April 2022III
This is a draft manual, technical specifications are subject to change
Enapter is not responsible for any damage caused by the device or to the device
based on wrong operation or setup.
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
04
EL –Owner’s Manual
2022-04-29
EL –Owner’s Manual – Rev.04 –April 2022IV
This is a draft manual, technical specifications are subject to change
TABLE OF CONTENTS
Change history ....................................................................................................................... I
Preface.................................................................................................................................. II
Enapter Srl..................................................................................................................................... II
Scope of the document.................................................................................................................. II
Approved use ................................................................................................................................ II
Terms ........................................................................................................................................... III
Table of Contents ................................................................................................................. IV
1. Overview of the Electrolyser............................................................................................ 1
1.1 Specifications ..................................................................................................................... 1
1.2 FRONT PANEL..................................................................................................................... 4
1.3 BACK PANEL ....................................................................................................................... 6
2. Safety instructions .......................................................................................................... 7
2.1 Warnings and Hazards........................................................................................................ 7
2.2 General safety.................................................................................................................... 7
2.3 Additional safety for the electrolyser .................................................................................. 9
3. Hazards........................................................................................................................ 10
3.1 Hydrogen hazard.............................................................................................................. 10
3.2 Mechanical hazards.......................................................................................................... 10
3.3 Electrical hazards.............................................................................................................. 11
3.4 Chemical hazards ............................................................................................................. 12
3.5 Chemical information ....................................................................................................... 12
3.6 Thermal hazards............................................................................................................... 13
3.7 Environmental hazards..................................................................................................... 13
3.8 Acoustic hazards............................................................................................................... 13
4. Installation of the Electrolyser....................................................................................... 14
4.1 Unpacking ........................................................................................................................ 14
4.2 Tools, material and accessories required .......................................................................... 14
4.3 Implementing System Safety ............................................................................................ 15
4.4 Instructions for connecting stainless steel tubes ............................................................... 16

VERSION
DOCUMENT TITLE
RELEASE DATE
04
EL –Owner’s Manual
2022-04-29
EL –Owner’s Manual – Rev.04 –April 2022V
This is a draft manual, technical specifications are subject to change
4.5 Instructions for connecting plastic tubes........................................................................... 20
4.6 Electrical Connection Guide (POWER)............................................................................... 29
4.7 Dry Contact Connection Guide (Optional) (DRY CON.) ....................................................... 30
4.8 Ethernet Port (ETH.) ......................................................................................................... 33
4.9 Initial operation of the electrolyser................................................................................... 33
5. Operation of the Electrolyser ........................................................................................ 37
5.1 Manual Start/Stop............................................................................................................ 37
5.2 Remote Start/Stop............................................................................................................ 37
5.3 Maintenance Mode.......................................................................................................... 37
5.4 Set Production Rate.......................................................................................................... 37
5.5 Ramp Up .......................................................................................................................... 38
5.6 Ramp Down...................................................................................................................... 38
5.7 Blowdown Routine ........................................................................................................... 39
5.8 Anti-Freezing Routine....................................................................................................... 39
5.9 Safety Heartbeat .............................................................................................................. 39
6. Enapter Monitoring Tools ............................................................................................. 40
6.1 Mobile Application ........................................................................................................... 40
7. Maintenance of the Electrolyser.................................................................................... 41
7.1 Updates ........................................................................................................................... 41
7.2 Routine Maintenance....................................................................................................... 41
7.3 Cleaning........................................................................................................................... 42
7.4 Disposal ........................................................................................................................... 42
7.5 Transport ......................................................................................................................... 42
8. Appendix ...................................................................................................................... 44
Appendix I. Hydrogen Leak Testing.................................................................................................................... 44
Appendix II. Preparing the electrolyte solution................................................................................................. 45
Appendix III. Draining the electrolyser............................................................................................................... 46
Appendix IV. LED States...................................................................................................................................... 47
Appendix V. Error Codes..................................................................................................................................... 48

VERSION
DOCUMENT TITLE
RELEASE DATE
03
EL –Owner’s Manual
2022-04-29
EL –Owner’s Manual – Rev.04 –April 20221
This is a draft manual, technical specifications are subject to change
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.
1.1 SPECIFICATIONS
The specifications of the electrolyser can be found in the datasheet. It can be downloaded here:
Datasheet of the electrolyser. See the battery limits for more detailed information about the interfaces
and connections of the device: Battery limits of the electrolyser.
Versions
Air Cooled:
Liquid Cooled:
AC-version:
DC-version:
EL4.0
Nominal Hydrogen Production
0.5 Nm3/h
1.0785 kg/24 h
Output Pressure
Up to 35 barg
Hydrogen Output Purity
35bar: ~99.9 % (H2O ≈ 1000 ppm)
8bar: > 9000 ppm H2O
Water Consumption
400 ml/h
Water Input Conductivity
< 20 µS/cm (at 25 °C)
Water Input Pressure Range
1 –4 barg
Process Liquid
1 % KOH solution
Operative Power Consumption
2.4 kW (max. 3.1 kW)
Peak Power Consumption
3.1 kW
Nominal Power Consumption
per Nm3of H2produced
4.8 kWh/Nm3(beginning of life)
Stand-by Power Consumption
15 W

VERSION
DOCUMENT TITLE
RELEASE DATE
03
EL –Owner’s Manual
2022-04-29
EL –Owner’s Manual – Rev.04 –April 20222
This is a draft manual, technical specifications are subject to change
Power Supply
200 V –240 V (AC), 50/60 Hz
48 V –60 V (DC)
Maximum Heat Dissipation
1,3 kW
Circuit Breaker
C13
Dimensions (W x H x D)
482 mm x 266 mm x 635 mm
Space inside cabinet
6 U
Weight
41 kg (empty) 1
37 kg (empty) 2
Control System Included
EMS
Communications
Wi-Fi
- 802.11a/b/g/n (2.4 GHz only)
- 802.12 WEP, WPA, WPA2 Personal (Pre-shared key)
- Wi-Fi client isolation must be disabled
Bluetooth
Modbus TCP via Ethernet
Remote Control
Enapter Cloud Service, Enapter App, Modbus TCP, Safety chain
(dry contact)
Safety
Maximum H2contained within
20 NL
Conformity
CE certified according to the machine directive 2006/42/CE
S.E.P. Classified as per 2014/68/EU PED
ISO 12100
IEC 61000-6-3
IEC 61000-6-2
ISO 13849
IEC 61010-1
IEC 61508
ISO 22734 ready
ASME B31:12
Noise level at 1 m
≈ 65 dB
Ventilation and Safety
Recommendation
Indoor: Ventilation depends on room size, Hydrogen detection
system with a safety circuit is recommended
Outdoor: Protect from outside environmental influences, if
integrated into a cabinet. Ensure the safety concept of each
integrated module is respected.
Environmental
Operating Conditions
5 °C to 45 °C, up to 95 % humidity, non-condensing 1
5 °C to 50 °C, up to 95 % humidity, non-condensing 2
Storage Conditions
IP Rating
IP 20
Interfaces
H2Outlet
¼” bspp female port
O2Vent Outlet
⅜” bspp female port
H2Vent Outlet
¼” bspp female port
H2O Inlet
10 mm push-fit female bulkhead connector
Fill / Drain Port
CPC quick connector 10 mm

VERSION
DOCUMENT TITLE
RELEASE DATE
03
EL –Owner’s Manual
2022-04-29
EL –Owner’s Manual – Rev.04 –April 20223
This is a draft manual, technical specifications are subject to change
Cooling Water Inlet 2
10 mm push-fit female bulkhead connector
Cooling Water Outlet 2
10 mm Push-fit female bulkhead connector
1Air Cooled electrolysers only (Liquid cooled versions excluded)
2Liquid Cooled electrolysers only (Air cooled versions excluded)

VERSION
DOCUMENT TITLE
RELEASE DATE
03
EL –Owner’s Manual
2022-04-29
EL –Owner’s Manual – Rev.04 –April 20224
This is a draft manual, technical specifications are subject to change
1.2FRONT PANEL
EL4.0 AC air cooled front side
EL4.0 DC liquid cooled 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 (10 mm 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 O2Vent Connection Guide
⅜" bspp female port
Output: O2with water vapour (H2O) and traces of H2
3. COOLING WATER IN/OUT –(only liquid cooled electrolysers) please refer to the Cooling Loop
Connection Guide
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" bspp female port
Output: 500 NL/hr of H2, up to 35 barg, 99,9% purity
5. H2VENT –please refer to the H2Vent Connection Guide
¼" bspp female port
Output: Periodical vent of up to 20 NL (H2and water) every 12 hours
6. FILL / DRAIN
CPC quick connector 10 mm
During maintenance routine for filling the electrolyte into the device or for draining
and preparing it for transport.
7. START STOP –please refer to the Manual Start/Stop section below
Manual start and stop button to start and stop the device
8. POWER –please refer to the Electrical Connection Guide
Manual power button to switch device on and off
9. ETH. –please refer to the Ethernet Port section below
Interface to access external Modbus control features of the electrolyser. Find more in
the chapter below.