Peak Gas Generation i-Flow 7000 Series User manual

i-Flow 7000 Series N2 Generators
User Manual
Copyright © Peak Scientific Instruments Ltd 2023 — i-Flow 7000 Series User Manual Rev 1 RSID 4707 EN - Alt —13/01/2023

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


Register Product to Operate
To begin operation you will need to register your generator. You can do so by
visiting www.peakscientific.com/activate or by downloading the Peak Genius
App.
Registering will activate your 2 year warranty* - covering every single
component in your generator.
Important!
You must register your generator before nitrogen generation can commence. In
order to be eligible for warranty your generator must be registered to the end
user (not a reseller or distributor) and must have a paid annual preventative
maintenance arranged within 13 months of the installation date & carried out by
a Peak approved Field Service Engineer. Once registered the warranty will be
honoured for a period of 24 months.**
* 2nd year warranty subject to completion of preventative maintenance visit arranged within 13 months of installtion.
For terms and conditions please visit www.peakscientific.com/warranty-statement/
** Call out and labour charges may apply where generator was not purchased directly from Peak

Contents
Change History 4
Introduction 5
Technical Description 6
Basic Concept 6
i-Flow 7000 Series Model Number Breakdown 7
Warranties and Liabilities 8
Warranty & Liability Coverage 8
Safety Notices 10
Symbols 10
Safety Notice to Users 10
EU Declaration of Conformity 11
CSA Compliance Statement 12
WEEE Compliance Statement 13
Technical Specification 14
Unpacking 16
Installation 17
Generator Environment 17
Generator Overview 18
i-Flow Mini General Dimensions 18
Overview 18
General Dimensions 18
Generator Overview 19
i-Flow Prime General Dimensions 19
Overview 19
General Dimensions 19
Inlet / Outlet Connections 20
Recommended Piping Layout 21
Compressed Air Quality 22
Class 2 – Particulate 22
Class 4 – Water 22
Class 1 – Oil 22
Electrical Connection 23
Electrical Connections 23
Product Registration 24
Home Screen 25
Information Screen 25
Settings Screen 26
Service Screen 26
Screen Warning Icons 27
Commissioning & Safe Start-Up Sequence 28
Normal Operation 30
Shortcycling – Bypass Active 30
Normal Operation 30
Refreshing – Bypass Active 30
Safe Isolation Process 31
Service Requirements 32
Service Schedule 32
Service Indication 33
Peak Protected 34
Cleaning 35
Error Messages 36
Troubleshooting 37
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Change History
Rev Comment Name Date
How to use this Manual
This manual is intended for end users and has been written as a reference document
where you can skip to the relevant information.
Users can refer to the contents page to find the relevant information.
Please review each of the following sections carefully.
Thank you for selecting Peak to meet your gas generation needs, should you require
any further assistance or support please do not hesitate to contact Peak or the Peak
Partner from which you purchased your generator.

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Introduction
The Peak Gas Generation i-Flow 7000 Series Nitrogen Generators are designed to
cater for a wide variety of industrial and scientific applications. The range consists of 2
generator size variants - namely, the N2 Mini & N2 Prime. Your generator will have been
carefully selected to meet your specific pressure, flow, and purity requirements, that
were specified at time of initial scoping & subsequently agreed upon. if you have any
questions regarding the specifications of your system please do not hesitate to contact
Peak Gas Generation or the Peak Partner from which you purchased your Generator.
Peak Gas Generation is a Trading Name of Peak Scientific Instruments Ltd. All Peak Gas
Generation products are manufactured by Peak Scientific Instruments Ltd.

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Technical Description
Basic Concept
i-Flow N2 Mini & N2 Prime are a range of modular nitrogen gas generators, that operate
based on the latest Pressure Swing Adsorption (PSA) technology, utilising a Carbon
Molecular Sieve (CMS) to extract nitrogen from air, at the specified flow, purity &
pressure. This process essentially requires two separate columns or “beds” of granular
carbon pellets of suitable grade.
A unit requires a compressed air supply to operate and ultimately works on very similar
principles to many standard air filtration / drying products. The inlet compressed air is
passed into the first carbon “bed”, as the air passes across the carbon bed the oxygen
is adsorbed, allowing the nitrogen to carry on through for collection and further use.
After a certain time the online carbon bed will become saturated with oxygen so the
control system will operate various valves to bring the second carbon bed online. Whilst
the second bed comes online, the first bed is safely vented to atmosphere to release
the adsorbed oxygen and regenerate the bed in preparation for the next cycle. This will
continue to alternate and repeat until the user stops consuming nitrogen.
Should the demand for nitrogen be less than the rated output flow, or indeed should
the demand stop, the generator will automatically go into Standby Mode and this will
be indicated on the front HMI screen. In Standby mode the changeover of the columns
is suspended which will stop the consumption of inlet compressed air. The control
system will automatically detect when the demand resumes and the generator will start
to produce nitrogen again.
General Construction
The range consists of 14 dierent product sizes, demonstrated below:
i-Flow N2 Mini
Base unit with
minimum single
bank of dual
CMS columns.
Base unit with
maximum 4
banks of dual
CMS columns

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i-Flow N2 Prime
The front end cabinet, control system and valves are consistent across the entire range.
To increase the outlet capacity, as you go up the range of generators, additional banks of
CMS columns can be added. (Note: Mini models with 3-4 & Prime models with 5-10 banks
require additional vent valves & silencers fitted to the rear of CMS column assembly).
i-Flow 7000 Series Model Number Breakdown
Base unit with
minimum single
bank of dual
CMS columns.
Base unit with
maximum 10
banks of dual
CMS columns
No. of Banks
Mini = 1-4
Prime = 1-10
Series Name Customer Option
O2 Sensor Type
1 = %
2 = PPM
3-9 = Unassigned
Model Class
M = Mini
P = Prime
7 X X X XXM/P

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Warranties and Liabilities
Warranty & Liability Coverage
1. Peak warrants that, subject to the provisions in this statement, purchased Peak generators, whether
purchased directly from Peak or indirectly via an approved, certified and trained distributor or partner
(referred to hereafter as a “Peak Partner”) will comply in all material respects with any specifications
referred to in your customer order confirmation and, subject to installation and operational guidelines
being followed as described in applicable product manuals, shall be free from any defects in quality
of materials or workmanship for a period of one year from the date of installation, provided this takes
place within 3 months of factory dispatch.
2. Where the purchased generator is from the Precision Hydrogen series, Peak further warrants that,
subject to installation and operational guidelines being followed as described in applicable product
manuals, the hydrogen cell shall be free from any defects in quality of materials or workmanship for a
total period of three years (inclusive of warranty period specified in clause 1) from date of installation,
provided this takes place within 3 months of factory dispatch.
3. Where the purchased generator is from the i-Flow 6000, 7000, 8000 or 9000 series and /or i-Flow
skidded solution, Peak further warrants that, subject to installation and operational guidelines being
followed as described in applicable product manuals, the generator shall be free from any defects
in quality of materials or workmanship for a total period of two years (inclusive of warranty period
specified in clause 1) from the date of installation, provided this takes place within 3 months of
factory dispatch and the following provisions have also been met:
a. you must purchase a service plan, ensuring the generator is serviced by Peak or a Peak Partner on
or before the end of the first 12 months of your ownership, and serviced at least once during each
subsequent 12 month period thereafter;
b. the generator (and any associated equipment) must have been commissioned by Peak or a Peak
Partner;
c. the feed air or inlet air supply to the generator must comply with the minimum ISO 8573-1:2010 air
class, as specified within relevant product user manual, at all times;
d. your air compressor, dryer, filtration and oil removal systems must be deemed suitable for use
by Peak or a Peak Partner, and must be changed and serviced regularly, in line with the equipment
manufacturer’s recommended guidelines; and
e. any generator failure or fault that is deemed to have been caused by the failure of any upstream
equipment, component, part or system (such as air compressor, air treatment or filtration) will be
excluded from the warranty described herein.
4. Peak also warrants that any replacement parts whether purchased (directly from Peak, or via a Peak
Partner) or supplied as part of any remedial action undertaken in line with the provisions of clauses 12
and 13, shall be free from any defects in quality of materials or workmanship for a period of 180 days
from the date of factory dispatch, provided its installation is performed by Peak or a Peak Partner.
5. This warranty does not exclude Peak’s liability in respect of any claim for death or personal injury
to any person, in so far as such can be attributed to negligence or breach of duty of care directly
resulting from failure of Peak to comply with the provisions in clauses 1, 2, 3 & 4.
Exclusions & Limitations
6. This warranty does not cover:
a. damage, deterioration or malfunction resulting from an alteration or modification to a generator
which has not been carried out by Peak or a Peak Partner;
b. damage, deterioration or malfunction resulting from what Peak reasonably believes to be abuse, or
misuse of a generator by you or any third party;
c. liability for accident or neglect (other than pursuant to clause 5);
d. maintenance or repairs which have not been carried out by Peak or a Peak Partner;
e. operation of a generator or exposure of a generator to environmental conditions that fall out-with
operational guidelines as specified in the applicable product user manual; and
f. lightning, power surges or any other acts of God or nature.
7. This warranty is non-transferrable. Only the original owner of the generator may benefit from the
terms within this statement.

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8. Peak shall not be liable in respect of any claim made for costs, damages, losses or expenses (whether
consequential, direct, indirect or otherwise) or in any respect howsoever arising including, but not
limited to, liability from accident or negligence (other than pursuant to clause 5) that may be suered
by you or any third party.
9. No person or entity is authorised to change the terms and conditions outlined in this warranty
statement in any respect, or to create any additional obligations or liabilities for any party involved.
10. This warranty statement supersedes any and all prior warranty agreements between the parties and
constitutes the complete, final and exclusive understanding of the parties with respect to the subject
matter. All prior negotiations, representations, or promises, whether oral or written, of either party
shall be deemed to have been merged herein.
11. If any part of this warranty statement is invalidated, for whatever reason, such part will be deleted
and the rest shall remain unaected, continuing to be in full force and eect.
Delivery of Warranty Service
12. Subject to clause 13, and:
a. Peak being notified by you, within the duration of the applicable warranty period, of any defect
that you think is subject to any warranty valid under clauses 1, 2, 3 or 4; and
b. Peak being permitted to inspect the generators, parts and their installation (along with any relevant
packaging)
Peak shall at its option repair or replace defective generators or parts (including, if necessary, any
moving parts and irrespective of runtime). No additional charges will apply, for parts or delivery and,
where applicable, labour or travel. Peak will endeavour to deliver this service within 3 working days of
your notification.
13. Where, in Peak’s reasonable opinion, a defect is subject to an exclusion described in clause 6, Peak
reserves the right to charge for parts or delivery and, where applicable, you may also be charged by
Peak for call out, labour or travel in respect of any repair or replacement which you authorize Peak, or
a Peak approved partner to carry out.

WARNING
WARNING
WARNING
WARNING
CAUTION
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WARNING
Safety Notices
Peak Gas Generation cannot anticipate every possible circumstance which may
represent a potential hazard. The warnings detailed within this manual detail the most
known potential hazards, but by definition cannot be all inclusive. If the user employs
an operating procedure, item of equipment or a method of working which is not
specifically recommended by Peak, the user must ensure that the equipment will not be
damaged or become hazardous to persons or property.
Symbols
This manual uses the following symbols to highlight specific areas important to the safe
and proper use of the Generator
A WARNING notice denotes a hazard. It calls attention to an operating procedure,
process or similar, which if not correctly performed or adhered to, could cause
personal injury or in the worst case death. Do not proceed beyond a WARNING
notice until the indicated conditions are fully understood or met.
A CAUTION notice denotes a hazard. It calls attention to an operating procedure,
process or similar, which if not correctly performed or adhered to, could cause
damage to the Generator or the Application. Do not proceed beyond a CAUTION
notice until the indicated conditions are fully understood or met.
Caution, risk of electric shock. Ensure power to the Generator has been removed
before proceeding.
Safety Notice to Users
These instructions must be read thoroughly and understood before
installation and operation of your Peak i-Flow 7000 Series Gas
Generator. Use of the Generator in a manner not specified by Peak Gas
Generation MAY impair the built in SAFETY features of the equipment.
When handling, operating or carrying out any maintenance, personnel
must employ safe engineering practices and observe all relevant local
health and safety requirements and regulations. The attention of UK
users is drawn to the Health and Safety at Work Act 1974, and the
Institute of Electrical Engineers regulations.
If the equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.
Nitrogen is not a poisonous gas, but if its concentration in breathed
air becomes too high, there will be a risk of asphyxiation. Ensure that
adequate ventilation is provided for the surrounding area, (depending
on the operating specification and model selected the generator can
produce up to a maximum nitrogen flow of 5,590 L/min)

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EU Declaration of Conformity
We Peak Scientific Instruments Ltd.
Of Fountain Crescent, Inchinnan, Renfrewshire, PA4 9RE
Hereby declare that, this declaration of conformity is issued under the sole
responsibility of the manufacturer.
Equipment Type: Nitrogen Generator
Model Designator: i-Flow 7000 & 9000 Series
PED Module B Certificate No : CE 744518
PED Module D Certificate No : CE 608103
Pressure assembly consisting of the following key parts :
Piping Spec or Description Fluid Phase PED Hazard Cat. Quality Module
Fluid Chart Cat
600mm Column Assembly600mm Column Assembly
(1 to 10 Model Dependant)(1 to 10 Model Dependant) Air/NAir/N22GasGas 2G/1G2G/1G 2/12/1 IIII B+DB+D
1700mm Column Assembly1700mm Column Assembly
(1 to 6 model dependent)(1 to 6 model dependent) Air/0Air/022GasGas 2G/1G2G/1G 2/12/1 IIII B+DB+D
Output Pressure Relief ValveOutput Pressure Relief Valve Air/NAir/N22/O/O22GasGas 2G/1G2G/1G 2/12/1 IVIV B+DB+D
Front End Control Cabinet inc. associated valves & pipingFront End Control Cabinet inc. associated valves & piping Air/NAir/N22/O/O22GasGas 2G/1G2G/1G 2/12/1 SEPSEP Not ApplicableNot Applicable
To which this declaration relates, is in conformity with the following applicable EU
Directives, harmonized standards, and other normative requirements.
• Low Voltage Directive 2014/35/EU
EN 61010-1: 2010 Safety Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use.
• Electromagnetic Compatibility Directive 2014/30/EU
EN 61326-1: 2013 Electrical Equipment for Measurement, Control and Laboratory Use
– EMC Requirements. (Class A)
• Pressure Equipment Directive 2014/68/EU
Design and Construction Standards applied: ASME Section VIII Division 1 2019
Edition and BS EN12392:2016. Conformity Assessment Procedure: B+D
• Restriction on the use of certain hazardous substances in electronic equipment
(RoHS) Directive 2011/65/EU as amended by EU 2015/863.
Name and address of Notified body conducting
the PED conformity assessment :
BSI Group The Netherlands B.V.
Say Building, John M Keynesplein 9,
1066 EP , Amsterdam,
Netherlands
EC Number - 2797
Signed for and on behalf of Peak Scientific by
Signed:
Name: Fraser Dunn
Position: Design Engineering Manager
Peak Scientific Instruments ltd,
Inchinnan, Renfrew, Scotland,
PA4 9RE, UK.
Date: 1st June 2022

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CSA Compliance Statement
CSA Group (Canadian Standards Authority) is a Nationally Recognised Testing
Laboratory (NRTL), headquartered in Toronto Canada.
They are authorised to evaluate product to both their own and Underwriters Laboratory
(UL) standards and certify the product to be in compliance to the relevant standards.
Peak products are certified to the current in force revision of the following standards
in order to cover both Canadian and United States requirements for “Safety
Requirements for Electrical Equipment for Measurement, Control and Laboratory use,
Part 1: general Requirements”.
Canada: CAN/CSA C22.2 No 61010-1-12
United States: UL 61010-1
As a result the products covered by this statement are certified and listed by CSA
accordingly and are entitled to carry the CSA mark with both Canadian and United
States subscripts , as shown below on the product rating label.

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WEEE Compliance Statement
The Waste Electrical and Electronic Equipment (WEEE) Regulations SI 2013 No 3113
and or the Waste Electrical and Electronic Equipment (WEEE) Directive 2012/19/EU
apply to all electrical and electronic equipment placed on the market in the UK and EU
covered by the scope of regulations which can be found in the Government Guidance
Notes (PDF) produced by the Department for Business Innovation and skills for the UK
and here for Europe.
All PEAK products that are subject to the WEEE directive are compliant with the
WEEE marking requirement. Such products are marked with the “crossed-out wheelie
bin” symbol (shown below) in accordance with European standard EN50419. All
old electrical equipment can be recycled. Please do not dispose of any electrical
equipment (including those marked with this symbol) in general rubbish bins. Please
contact your dealer or distributor for clarity.

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Technical Specification
Environment
Minimum Operating Ambient Temperature +5°C (41°F)
Maximum Operating Ambient Temperature +50°C (122°F)
Maximum Altitude 3000m
Maximum Relative Humidity 80% non-condensing
When taken out of storage, the Generator should be allowed to acclimatize at room
temperature for a minimum of 3 hours before operation.
Compressed Air Supply
Depending on your specific application, the pressure and flow required from the
compressed air supply to the generator will vary. For your specific requirements
please refer to your quotation documents, or contact Peak Gas Generation for further
information. However all installations must meet the following conditions:
Minimum Air Quality IS0 8573-1:2010 class 2.4.1
Minimum Inlet Air Pressure 87 psig (6barg)
Maximum Inlet Air Pressure 167 psig (11.5 barg)
Minimum Inlet Air Temperature +5°C (41°F)
Maximum Inlet Air Temperature +45°C (113°F)
If you are in any doubt over the quality of your inlet compressed air DO
NOT CONNECT to the generator, and contact Peak Gas Generation or
the Peak Partner from which you purchased your Generator. Peak Gas
Generation can oer a full range of compressors and air preparation
equipment if required, which can be backed up by our global service
support network. If incorrect air quality is used, resulting in damage to
the generator, the warranty becomes void.
It is the User / Installer’s responsibility to ensure the generator is connected to a
suitably rated air supply, the air supply must also provide suitable protection to prevent
over pressurization of the Nitrogen Gas Generator.
Electrical Requirements
Voltage 100 - 240 VAC ±10%
Frequency 50/60 Hz
Current 2.0 – 1.0 A
Input connection C20 Plug
Power cord (Supplied) C19 socket to local connection
Pollution degree 2
Means of Protection Class I Protection
Installation / Transient Overvoltage Category Category II
WARNING

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General
i-Flow Mini 1 Bank 2 Banks 3 Banks 4 Banks
Width mm(in) 418 (16.5)
Height mm(in) 853 (33.6)
Depth mm(in) 830 (32.7) 992 (39.1) 1154 (45.4) 1316 (51.8)
Weight kg(lbs) 96 ( 211) 132 (291) 178 (392) 214 (471)
Shipping weight kg(lbs) 115 (253) 153 (337) 202 (444) 240 (528)
Noise level 59 dBA @ 1m
i-Flow Prime 1 Bank 2 Banks 3 Banks 4 Banks 5 Banks
Width mm(in) 418 (16.5)
Height mm(in) 1953 (76.9)
Depth mm(in) 730 (28.7) 892 (35.1) 1054 (41.5) 1216 (47.9) 1378 (54.3)
Weight kg(lbs) 179 (394) 257 (566) 335 (737) 413 (909) 501 (1102)
Shipping weight kg(lbs) 203 (447) 285 (627) 366 (805) 447 (984) 539 (1186)
Noise level 59 dBA @ 1m
i-Flow Prime 6 Bank 7 Banks 8 Banks 9 Banks 10 Banks
Width mm(in) 418 (16.5)
Height mm(in) 1953 (76.9)
Depth mm(in) 1540 (60.6) 1702 (67.0) 1864 (73.4) 2026 (79.8) 2188 (86.1)
Weight kg(lbs) 579 (1274) 657 (1446) 735 (1617) 813 (1789) 891 (1960)
Shipping weight kg(lbs) 620 (1364) 701 (1542) 783 (1723) 864 (1901) 945 (2079)
Noise level 59 dBA @ 1m

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Unpacking
Although Peak Gas Generation takes every precaution with safe transit and packaging,
it is advisable to fully inspect the unit for any sign of transit damage.
Check ‘SHOCKWATCH’ and ‘TIP-N-TELL’ labels for signs of rough handling prior to
unpacking.
Any damage should be reported immediately to the carrier and Peak Gas Generation
or the Peak Partner from where the unit was purchased.
Page 16

Page 17
Installation
It is the user/installer’s responsibility to ensure that the generator
is located and protected against any external influences such as
vibration, shock, wind, snow loading, earthquake or fire. The installation
should conform to all local regulations and should be leak tight and
completed by technically competent personnel.
Final Location of the generator should be carefully considered, the largest model in
the range will weigh 891 kg / 1920 lbs. Equipment is only to be installed on floor with a
weight rating of min 1200kg/m2 or 245lbs per Sq.ft.
Once in position the foot plate of the generator must be bolted to the floor using
fixings suitable for the material construction of the floor. 13mm diameter holes are provided
to allow the unit to be fixed to the floor. Depending on the generator model you will have
4 or 8 fixing positions. Typically 10mm or 3/8” floor fixings approx. 75mm or 3” in length
will be suitable on most concrete floors.
The generator should be situated in a well ventilated environment and should be
positioned such that it can be easily disconnected from the mains supply if required.
Taking into account the required Inlet air filtration and outlet buer tank, expected
enclosed room size should not be less than 2.5 x 3.0 x 2.5 M or 18.75 cubic meters.
Depending on the required outlet purity & pressure the generator can produce anything
between 39 and 5,590 l/min of Nitrogen. To ensure adequate ventilation the air flow
through the room in which the generator is installed should as a minimum match the
output of the installed generator in ltr/min.
This is a heavy item a minimum of 2 people are required to unpack and handle it and
appropriate safe handling practise and equipment should be used when unpacking and
moving to its final install location.
Generator Environment
The Generator is designed for indoor use or can be housed in a
suitable weatherproof enclosure. It should be installed adjacent to the
application it is supplying. If this is not convenient then the unit can be
sited elsewhere, however, consideration should be made of the lengths
of pipe runs as pressure drops can result from extended runs of pipe.
Consideration should be given to the location of the generator
to ensure it is protected from extreme fluctuations in ambient
temperature. Ensure that adequate ventilation is provided for the
surrounding area, (depending on the operating specification and
model selected the generator can produce up to a maximum flow
of 5,590 L/min). Installation in a confined space or poorly ventilated
space is not recommended, however if you choose to do so ambient
oxygen monitoring equipment is recommended.
WARNING
WARNING
CAUTION

Page 18
Generator Overview
i-Flow Mini General Dimensions
Note: Each additional bank assembly = 162mm / 6.4”
The Generator must always be placed on a level surface. Failure to do so
will aect the stability of the Generator.
1316 mm / 51.8”
853mm / 33.6”
WARNING
830 mm / 32.7”418 mm / 16.4”

Page 19
Generator Overview
i-Flow Prime General Dimensions
Note: Each additional bank assembly = 162mm / 6.4”
The Generator must always be placed on a level surface. Failure to do so
will aect the stability of the Generator.
2188 mm / 86.1”
1953mm / 76.9”
WARNING
730 mm / 28.7”418 mm / 16.4”

Page 20
Inlet / Outlet Connections
The i-Flow 7000 Series generators can be piped (air inlet and gas outlet) from either
side to suit site/ location. The unit will be supplied with two blanking plugs which can
be installed in either the left or right hand ports to allow the opposite side to be used.
i-Flow Mini i-Flow Prime
Nitrogen
Outlet
3/4” F BSP
Compressed
Air Inlet
1” F BSP
Nitrogen
Outlet
1/2” F BSP
Compressed
Air Inlet
1/2” F BSP