Enapter DRY2.1 User manual

Owner’s Manual
Dryer 2.1
Please study this manual carefully before unpacking, installing, and operating the device.
Rev. 03 –January 2023

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DR2.1 –Owner’s Manual – Rev.03 –January 2023I
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. The product and
specifications are subject to change without notice.
Rev.
Status
Date
Revision memo
Created/changed by
01
IFI
24/10/2022
First version
Philipp Endres
02
IFI
24/11/2022
Overall updates in safety, filling routine and more
Philipp Endres
03
IFI
11/01/2023
Updated pictures and amount of KOH
Philipp Endres

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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”.
Danger! 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 relevant local safety guidelines, rules, directives and regulations.
Enapter is not guaranteeing efficiency, safety, and functionality in case of
modifications not described in this document.

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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.

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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 Dryer..................................................................................................... 6
1.1 Specifications ..................................................................................................................... 6
1.2 FRONT PANEL..................................................................................................................... 7
1.3 BACK PANEL ....................................................................................................................... 8
2. Safety instructions .......................................................................................................... 9
2.1 Warnings and Hazards........................................................................................................ 9
2.2 General safety.................................................................................................................. 10
2.3 Additional safety for the dryer .......................................................................................... 11
3. Hazards........................................................................................................................ 12
3.1 Hydrogen hazard.............................................................................................................. 12
3.2 Mechanical hazards.......................................................................................................... 13
3.3 Electrical hazards.............................................................................................................. 13
3.4 Chemical hazards ............................................................................................................. 15
3.5 Chemical information ....................................................................................................... 15
3.6 Thermal hazards............................................................................................................... 16
3.7 Environmental hazards..................................................................................................... 16
3.8 Acoustic hazards............................................................................................................... 16
4. Installation of the Dryer ................................................................................................ 17
4.1 Unpacking ........................................................................................................................ 17
4.2 Tools, material and accessories required .......................................................................... 17
4.3 Implementing System Safety ............................................................................................ 18
4.4 Piping and Instrumentation Diagram (P&ID)...................................................................... 19

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4.5 Instructions for connecting stainless steel tubes ............................................................... 20
4.6 Electrical Connection Guide.............................................................................................. 25
4.7 Initial operation of the dryer............................................................................................. 27
5. Operation of the Dryer.................................................................................................. 28
5.1 Manual Start/Stop............................................................................................................ 28
5.2 Remote Start/Stop............................................................................................................ 28
5.3 Drying .............................................................................................................................. 28
5.4 Cooling............................................................................................................................. 29
5.5 Switching ......................................................................................................................... 29
5.6 Pressurizing...................................................................................................................... 29
5.7 Finalizing.......................................................................................................................... 29
5.8 Dryer Control Network ..................................................................................................... 29
5.9 Troubleshooting............................................................................................................... 29
6. Enapter Monitoring Tools ............................................................................................. 30
6.1 Mobile Application ........................................................................................................... 30
7. Maintenance of the Dryer............................................................................................. 31
7.1 Updates ........................................................................................................................... 31
7.2 Routine Maintenance....................................................................................................... 31
7.3 Cleaning........................................................................................................................... 32
7.4 Disposal ........................................................................................................................... 32
7.5 Transport ......................................................................................................................... 32
8. Appendix ...................................................................................................................... 34
Appendix I. Hydrogen Leak Testing.................................................................................................................... 34
Appendix II. LED States ....................................................................................................................................... 35
Appendix III. Error Codes .................................................................................................................................... 35

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1. OVERVIEW OF THE DRYER
Enapter's hydrogen dryer is a standardised, stackable, and flexible device to dry 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 dryer can be found in the datasheet. It can be downloaded here:
Datasheet of the dryer. See the battery limits for more detailed information about the interfaces and
connections of the device: Battery limits of the dryer.
DRY2.1
Nominal Hydrogen Drying Rate
35 bar version: 2.5 Nm3/h
8 bar version: 1.0 Nm³/h
Output Pressure
Up to 35 barg / 8 barg
Hydrogen Output Purity
~99.999% in molar fraction compliant with ISO14687
Average Dewpoint and Impurities
< -70 °C, (H₂O < 5 ppm, O₂ < 5 ppm)
Minimum Input Purity
35 bar version: > 99.8 %
8 bar version: > 99.0 %
Operative Power Consumption
200 W
Nominal Power Consumption
35 bar version: 0.045 kWh/Nm³ of H2
8 bar version: 0.14 kWh/Nm3of H2
Stand-by Power Consumption
10 W
Power Supply
200 –240 V (AC), 50/60 Hz
Dimensions (W x H x D)
482 mm x 176 mm x 634 mm
Space inside cabinet
4 U
Weight
23 kg
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
Remote Control
Enapter Cloud Service, Enapter App
Safety
Maximum H2contained within
device
47 NL
Conformity
CE certified according to the machine directive 2006/42/CE
Category I Classified as per 2014/68/EU PED
ISO 12100
IEC 61000-6-3
IEC 61000-6-2
ISO 13849

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IEC 61010-1
ASME B31:12
Noise level at 1 m
< 60 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 90 % humidity, non-condensing
Storage Conditions
2 °C to 55 °C, up to 90 % humidity, non-condensing
IP Rating
IP 20
Interfaces
H2Inlet
¼” Swagelok Tube Fitting
H2Outlet
¼” Swagelok Tube Fitting
Purge Outlet
¼” Swagelok Tube Fitting
Depressurising Line
¼” Swagelok Tube Fitting
1.2FRONT PANEL
DR2.1 front side
The front panel of the dryer includes all physical connections of the device.
1. H2IN –please refer to the Hydrogen Inlet Connection Guide below
¼" double ferrule Swagelok tube fitting bulkhead (SS-400-61)
Input: max. 2.5 Nm³/h H2at 35 Bar, max. 1.0 Nm³/h H2at 8 Bar
2. H2OUT –please refer to the Hydrogen Outlet Connection Guide below
¼" double ferrule Swagelok tube fitting bulkhead (SS-400-61)
Output: max. 2.5 Nm³/h H2at 35 Bar, max. 1.0 Nm³/h H2at 8 Bar

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3. H2PURGE –please refer to the Purge Connection Guide below
¼" double ferrule Swagelok tube fitting bulkhead (SS-400-61)
Output: Intermittent, up to 28 NL H2/h during some operational states + water vapor
Up to 47 NL H2is purged when the device is shut down.
4. DEPR. –open this depressurisation line only before transportation of the dryer. Do not connect
any pipe to this port.
5. POWER –please refer to the Electrical Connection Guide
6. On/Off Switch –Use this button to switch the device on and off
7. Fuses –please refer to the Electrical Connection Guide
to protect the device against overcurrent
8. START STOP –please refer to the Manual Start/Stop section below
Manual start and stop button to start and stop the device
9. ANT. –Antenna port
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!
10. LEDs –please refer to the Appendix IV
Status LEDs to show device status
11. Mesh –please refer to the Routine Maintenance section below
Keep the mesh free and clean it regularly
1.3BACK PANEL
DR2.1 back side
The back panel of the device is used to blow out warm air. The stickers show the device specifications
and serial number details. Please leave at least 30 cm space behind the module to allow for adequate
airflow. Never obstruct the ventilation openings!

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2. SAFETY INSTRUCTIONS
2.1 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 injuries or death
Warns of injury
Warns of physical damage to the product
Warns of explosions
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 (PPE)
Wear hearing protection

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2.2 GENERAL SAFETY
Serious injuries and death as well as damages to the product or the environment
possible! Follow the instructions in this manual carefully!
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 piping (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 all relevant local safety guidelines, rules, directives and regulations.
4. The operator must check the device for hydrogen, water and KOH leakages regularly and ensure
that all interfaces are connected correctly.
5. It is the operator’s responsibility to regularly check and maintain all outlet lines, as well as to keep
the pipes free of ice, other obstructions or overpressure.
6. 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.
7. If larger hydrogen systems are created by putting together several modules, it is the operator’s
responsibility to ensure full compliance of the final assembly with all relevant local safety
guidelines, rules, directives and regulations.
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 and plug 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 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:
Wear protective goggles and nitrile gloves when handling the electrolyte solution.
Wear ear muffs or plugs in noisy areas.
Wear gloves when handling the device.

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Wear appropriate footwear when handling the device.
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 and trained 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.
2.3 ADDITIONAL SAFETY FOR THE DRYER
In addition, 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.

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3. HAZARDS
The operator who operates, services, maintains, or installs this device must be aware of the potential
dangers associated with its use and set up, the required materials, as well as the inputs and outputs, to
implement sufficient countermeasures and processes to prevent accidents and act correctly in case of
emergencies.
Serious injuries and death as well as damages to the product or the environment
possible! Follow the instructions in this manual carefully!
Always ensure that the device is installed and operated in compliance with all relevant
local safety guidelines, rules, directives and regulations. Do not install, operate, or
maintain the device without explicit knowledge or help from experienced and licensed
system integrators, the manufacturer, or external certifying bodies.
3.1 HYDROGEN HAZARD
It is the operator’s responsibility to implement a safety system to manage the devices inputs and
outputs –more information about this is below.
Danger! Hydrogen is a highly explosive and volatile gas!
Hydrogen can explode! Do not mix hydrogen with oxygen or air! Prevent hydrogen from
leaking! Even small leakages will create flammable and explosive environments!
Prevent electrostatic charging of the device. Hydrogen ignites very easily!
Do not inhale hydrogen!
Hydrogen can cause asphyxiation!
Hydrogen is very volatile. Still it can accumulate in areas and materials that are
unexpected. Do not handle hydrogen without a suitable ventilation and safety system!
Incorporate the device, especially the hydrogen and the vent lines, into the operational
safety concept and comply with all relevant local safety guidelines, rules, directives and
regulations.
Avoid heat in the vicinity of the device.
Do not smoke and do have naked flames in the vicinity of the device.
Do not have hydrogen, not even in low concentrations in the vicinity of the device.
The hydrogen which comes out of the device is under pressure! Comply with all relevant
local safety guidelines, rules, directives and regulations for the handling of compressed
hydrogen.
In the case of escaping gas, stay away and keep inflammable materials away.
Ensure proper installation of the supply pipes.
Check the hydrogen lines and connectors regularly for leakages.

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3.2 MECHANICAL HAZARDS
It is always necessary to wear appropriate personal protective equipment (PPE) and to use suitable
tools when handling the device and packaging material.
A general training with regards to lifting heavy loads and general safety briefings are required to
perform the tasks safely described in this manual.
Operators must comply with the general safety principles during the handling phases. In particular:
Caution! The device is heavy!
Before handling, moving, and commissioning the device –assess the hazards
of the operation and study the manual. Appropriate PPE must be worn, such
as cut resistant gloves, safety shoes, protective goggles, etc. depending on the
activity.
Clear the area of work before starting to mount the device.
The device is heavy and must be lifted by at least 2 people –plan around this
and allow ample space to move around.
Do not lift the device over the head.
Caution! Handle the device with care!
During handling of the device, be cautious and use the handles on the device
to minimise the mechanical risks, such as:
Impacts and crushing injuries due to uncontrolled movements of the load.
Dropping the device, causing crushing injuries
Loss of stability, leading to entanglements and other injuries.
The packaging/device must be handled by at least two people.
3.3 ELECTRICAL HAZARDS
The device poses no special electrical hazards, if the following instructions on safety measures are
followed and the Electrical Connection Guide below is applied correctly:
Warning! The device requires an electrical power supply!
Handle the electrical installation with care. Ensure that the power plug is fastened
and fixed correctly into the socket to avoid any loosening of the wiring.
The power plug is not double insulated. Therefore it could become hazardous in
single fault condition. Make sure to disconnect the upstream power source before
touching the power plug.
Use only the supply voltage specified for the device.
Do not short-circuit inputs and outputs.
Do not reverse the polarity of inputs and outputs.
Do not insert any mechanical parts, especially metal parts, into the device through
the ventilation slots or other openings.
Do not use liquids near the device.

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Never use the device if any part of it has been immersed in water.
Do not touch the antenna when the device is powered on, ensure being
electrostatically discharged when mounting/dismounting the antenna.
Warning! Explosion hazard! Do not remove or replace the power supply plug or fuses
while circuit is live unless the area is free of ignitible concentrations
Always turn off the device, remove the power supply and fully ventilate the room first
before removing or replacing the fuses. Otherwise electric sparks may occure. The area
must be always free of ignitable concentrations.
Warning!
Always turn off the power supply when the device is being cleaned, maintained, or
transported. Any servicing, other than cleaning and routine user maintenance, must be
performed by trained, Enapter-endorsed technicians.

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3.4 CHEMICAL HAZARDS
Potassium Hydroxyde is used in the electrolyser as the main process liquid (electrolyte). The electrolyte
usually comes pre-mixed with the electrolyser but it can also be purchased as a powder to be diluted
in purified water.
Caution! The device contains chemicals!
Refer to the Material Safety Data Sheet (MSDS) of all chemicals used before
handling them. All persons mixing, draining, and handling the electrolyte must
be informed about the chemicals and potential hazards.
Caution! Protect yourself!
Wear appropriate personal protective equipment (PPE). Avoid contact with
eyes and skin.
If you got in contact with the solution, immediately wash the affected area and
refer to the material safety data sheet of potassium hydroxide supplied with
the electrolyser.
Ensure all material used to store the electrolyte solution is chemically
compatible with it.
In the event of physical contact with the undiluted substance, refer to the material safety data sheet of
potassium hydroxide and follow the instructions below.
First Aid Recommendations
In the event of skin contact, take off contaminated clothing immediately. Wash off
with soap and plentiful water. Consult a doctor.
In the event of eye contact, rinse carefully with plentiful water for at least 15
minutes, and consult a doctor.
If ingested, do not administer anything to people that have fainted. Rinse mouth
with water. Consult a doctor immediately.
3.5 CHEMICAL INFORMATION
Substance: Potassium Hydroxide
CAS no.: 1310-58-3
EC no.: 215-181-3
Classification: C.
R Phrases: R22, R36/38, R43, R42
S Phrases: S24-37, S39, S62
(see Safety Material Data Sheet included in the shipment)

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3.6 THERMAL HAZARDS
Thermal hazards such as burns and scalds from contact with high-temperature surfaces can be
prevented by following these safety instructions:
Caution! Parts of the device and attached pipes and connectors become very hot!
Never open the device unless being specially trained for service by Enapter.
Do not touch the O2vent port or any attached pipes directly after operation. The
O2is released with up to 225 °C. Switch off the device and wait until it is cooled
down before servicing, transporting or changing the piping of the device.
3.7 ENVIRONMENTAL HAZARDS
The device has been designed for use in standard ambient conditions, respecting stability requirements
(in the absence of seismic or hydrogeological events).
The device has not been designed for outdoor use. It is the operator’s responsibility to protect the
device and all its accessories against atmospheric phenomena such as direct sunlight, rain, snow, and
lightning.
3.8 ACOUSTIC HAZARDS
According to the requirements stated into the Machine Directive 2006/42/EC, the following topics have
been considered:
Caution! The device vents gases with a loud noise!
During regular operation, the device emits a noise level below the maximum acceptable
threshold for long time exposure (80 dBA).
However, a sudden vent (either caused by device shut down or unforeseen error) can
be louder than 85 dB, depending on the vent line installation. Due to this, Enapter
recommends wearing PPE (earplugs) while working around the device.

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4. INSTALLATION OF THE DRYER
Any person working on the device must be familiar with the hazards and risks associated with installing,
commissioning, and running it. The device is a non-portable device. It has to be installed in a secured,
fixed horizontal position to prevent accidental movement or dropping.
4.1 UNPACKING
The device has been carefully inspected and tested before shipping. Visual checks for damage and
functional tests should be performed upon receipt. During transport, installation, packaging or
unpackaging, do not tilt, shake or turn the device by more than 50° to avoid damages. Do not install the
device on an inclined position of more than 10°.
Please remove the thin foil that covers the chassis before mounting the device in its final position. Make
sure, to not remove the warranty labels on the backside when removing the foil.
Please do not dispose the original shipping materials. Enapter will not accept devices if they are
returned without the original shipping boxes or equivalents for a safe transport. If the shipping boxes
cannot be kept, please recycle responsibly.
Notice! Claim transport damages directly on arrival!
If any damage has occurred during transport, please report this immediately to the
shipping agent and supplier. Afterwards, the device should be returned according to
the shipping instructions provided in this manual, in the section “Transport,
Maintenance and Recycling”.
Caution! The device is heavy!
Never lift the device out of the packaging alone. The device weights over 20 kg. Please
see the datasheet for more details.
Use lifting aids if available.
Due to their weight and size, it is recommended to use a pallet cart or similar devices
to manoeuvre the box upon delivery.
If the box must be lifted somewhere, always lift with at least two persons.
4.2 TOOLS, MATERIAL AND ACCESSORIES REQUIRED
The following tools, equipment, and material are needed to connect the device successfully. Ensure the
material chosen for this task is compatible with hydrogen operation.
4.2.1 TOOLS
9/16” combination wrench
5/8” combination wrench
Slotted screwdriver
Stainless steel pipe cutter
¼” tube bender

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4.2.2 MATERIAL
Stainless steel AISI 136- ASTM A269 ¼” outside diameter X 0,89 mm w.t.
4.2.3 ACCESSORIES (INCLUDED IN THE BOX)
Ferrite cylinder for power input cable
Swagelok Nut and Ferrule set
4.3 IMPLEMENTING SYSTEM SAFETY
Each connection to and from the device must be inspected and tested. Additional system engineering
might be required to ensure safe operation.
Always follow best practices, apply local codes of regulation (if applicable), and follow industry
standards for the implementation of safety systems to manage the risks of producing and storing
hydrogen.
Gas containing pipes must be properly connected to the specific ports, tested by the operator, and
directed to separate safe areas. If this is not possible, the operator must find another safe solution,
such as using a flare stack, burn box or forced dilution. When forced dilution is utilised, all components
used in this process must not be able to ignite the hazardous substances.
Danger! The device produces explosive and highly volatile gases!
It is the operator’s responsibility to ensure good engineering practices are applied to
the hazardous substances which are released during the operation of the device!

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DOCUMENT TITLE
RELEASE DATE
03
DR2.1 –Owner’s Manual
2023-01-13
DR2.1 –Owner’s Manual – Rev.03 –January 202319
The operator must ensure that the outlet satisfies all relevant local safety guidelines,
rules, directives and regulations, in terms of the safe dispersion of the vented gas, noise
emission, risk assessments, maintenance, a satisfactory safety concept being utilised,
and all other relevant areas.
It is the operator’s responsibility to regularly check and maintain all pipes.
4.3.1 SAFETY AREAS AROUND THE VENT OUTLETS
Generally, there are two options. The extents of this safety area depend on different parameters, for
example, the diameter and the length of piping leading to the safe area, the vent spout design, exit
velocity and wind conditions.
Preferably, the operator:
1. calculates the measurements of the safety area based on the provided data for each specific
output and applies industrial standards such as the following to their system design, safety concept
and site documentation.
EIGA Doc 211/17: Hydrogen Vent Systems for Customer Applications
CGA G5.5: Hydrogen Vent Systems
ISO/TR 15916:2015: Basic considerations for the safety of hydrogen systems
2. Or follows the recommendations of Enapter for systems consisting of up to ten electrolysers and
two dryers. The safety area is cylindrical and has a height of 10 meters and a radius of 5 meters.
Note that depending on the design of the vent piping and exit velocity, this area also extends in
the direction of the ground by at least 1 meter.
Never place the O2vent outlet near the H2vent outlet to minimise the risk of explosion. Leave at least
3 meters of space between the gas outlets.
4.4 PIPING AND INSTRUMENTATION DIAGRAM (P&ID)
The following diagram shows internal components of the device as well as how it interacts with the
Enapter Electrolyser and the Enapter Water Tank. It is also available here. Please note that the diagram
is slightly simplified to be better understandable and to protect Enapter’s intellectual property.