Nitrogen generator model N2-Bora User`s manual
Nitrogen generator model N2-Bora
User’s manual
MATHESON TRI-GAS
166 Keystone Drive
Montgomeryville, PA 18936
Phone: 215-641-2700
Fax: 215-641-2714
Email: [email protected]
Nitrogen Generator N2-Bora User’s Manual
Index
Index
INDEX.................................................................................................................................................................... 1
INTRODUCTION................................................................................................................................................. 2
SCOPE OF THE MANUAL ....................................................................................................................................... 2
SPECIFICATIONS .................................................................................................................................................. 2
NOTES ON FCC COMPLIANCE .............................................................................................................................. 2
CORRECT USE ...................................................................................................................................................... 3
PACKING LIST ...................................................................................................................................................... 3
DESCRIPTION ..................................................................................................................................................... 4
INSTALLATION .................................................................................................................................................. 5
RECEIVING THE GENERATOR ............................................................................................................................... 5
PLACING THE GENERATOR ................................................................................................................................... 5
SYMBOLS USED ON THE GENERATOR ................................................................................................................... 5
GAS CONNECTIONS .............................................................................................................................................. 5
INITIAL START-UP ............................................................................................................................................ 6
START N2-BORA .................................................................................................................................................. 6
OPERATION ......................................................................................................................................................... 6
MAINTENANCE .................................................................................................................................................. 9
ROUTINE MAINTENANCE ..................................................................................................................................... 9
RETURNING THE UNIT ........................................................................................................................................ 13
SPARE PARTS LIST.......................................................................................................................................... 14
1
Nitrogen Generator N2-Bora User’s Manual
Introduction
Introduction
Scope of the manual
This manual provides operation and maintenance instructions for model N2-Bora nitrogen
generator.
Specifications
Specifications of the nitrogen generator
Nitrogen flow rate
STP: Standard temperature and
pressure (20°C, 1 bar)
Max outlet pressure
0-500 cc/min at STP
0-750 cc/min at STP
0-1300 cc/min at STP
5 bar (73 psi)
Purity
99.999%+ (O2 < 10 ppm)
Weight
Fuse
18 kg
120 or 240V / 50 or
60Hz
4A or 2A
Pressure accuracy
0.1 bar (± 0.5 %)
Microprocessor controlled display
Graphic display, 128 x 64 pixels
Index of protection
Operating conditions:
- Temperature
- Relative humidity
Over voltage category
IP2x
Pollution degree
2
Sound pressure level
48 dB(A)
Case dimensions
350 x 430 x 230 mm (WxDxH)
Input voltage
15°C to +40°C
0-80%, non condensing
II
Notes on FCC compliance
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
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Nitrogen Generator N2-Bora User’s Manual
Introduction
If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
 Reorient or relocate the receiving antenna.
 Increase the separation between the equipment and receiver.
 Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
 Consult the dealer or an experienced radio/TV technician for help.
WARNING!
Any changes or modifications to this equipment not expressly approved by the manufacturer may void the user's authority to operate the equipment.
Correct use
Nitrogen generator is designed to produce nitrogen for laboratory use. The unit must only be
operated for this purpose, according to the specifications and instructions provided in this
manual. In particular, the following warnings must be observed at all times:
 Indoor use only
 Never operate the unit in below-zero temperatures.
 Only operate the unit in a room with sufficient ventilation (see “Placing the unit”).
 Always unplug the unit from the mains power supply before accessing the internal
components for replacement.
 Only the parts described in the “Spare parts list” can be replaced by the user.
Packing list
List of items included in the shipment
Quantity
Description
1
Nitrogen generator
1
Instruction manual
1
Power cable
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Nitrogen Generator N2-Bora User’s Manual
Description
Description
The nitrogen generator produces pure nitrogen through the filtration of compressed air. The
key element of the generator is a carbon molecular sieve that is able to separate the nitrogen molecules from the oxygen ones present in the compressed air stream. The two carbon
molecular sieve tubes are self regenerating cyclic. Two compressors are an integral part of
the generator and their purpose is to compress air up and force it into the tubes containing
the carbon molecular sieve.
The generated nitrogen gas is accumulated in a specific reservoir. The internal pressure is
controlled by a pressure transducer. The outlet pressure is adjusted with a forward pressure
regulator and by default set to 5 bar. The nitrogen then passes through the outlet port at the
rear.
CHECK
VALVES
CMS
TUBES
NITROGEN
RESERVOIR
COOLING
COIL
PURGE
LINE
AIR
INLE
COMPRESSED
AIR FILTER
PLC
INLET SOLENOID
VALVES
N2 FLOW
CONTROL
EXHAUST SOLENOID
VALVES
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Nitrogen Generator N2-Bora User’s Manual
Maintenance
Installation
Receiving the generator
All units have been carefully inspected before transport. Visual checks for damage and functional tests should be performed upon receipt. Any damage must be immediately noted and
reported. The generator must only be returned according to the shipping instructions provided.
Placing the generator
The nitrogen generator must be placed on a flat, level, vibration-free, shock-free surface. Do
not place the generator over a source of heat, as this may cause the device to overheat. The
unit should not be in contact with any other objects on any side, and the air inlet must not be
blocked. Leave at least 30 cm of free space at rear for ventilation. Do not operate the
generator in a sealed or unventilated room. Do not operate the generator at below freezing
temperatures. Operation is guaranteed at operating temperatures between +15 and +40°C.
WARNING!
Normal precautions for any nitrogen supply should be taken when using the generator.
DO NOT use in sealed or unventilated rooms. Nitrogen can cause suffocation.
Symbols used on the generator
Earth symbol:
This symbol marks the earth connections to the chassis of the nitrogen generator.
Gas connections
Pure nitrogen at regulated pressure is available at the nitrogen outlet port at the rear of the
generator. This port must be connected to 1/8" tubing using a stainless-steel or copper
Swagelok connector. Teflon connectors are not suitable. The pressure at this port is adjusted and shown on the display.
WARNING!
The line from the relief port should never connected in such a way that back pressure can
develop.
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Nitrogen Generator N2-Bora User’s Manual
Maintenance
Initial start-up
Start N2-Bora
- Switch on the unit.
- Push the START button.
- The unit’s compressor will start to run and nitrogen will be produced immediately.
- It will last 30 minutes before the nitrogen produced will reach the stated purity.
- The system is ready for use now.
Operation
The operating status of the unit is shown on the main screen on the graphic display.
The main screen has three options at the bottom, corresponding to the three buttons on the
unit, which are used to run the various functions and access the configuration.
- The button on the left is used to start the unit.
- The button on the right is used to stop the unit.
After swiching on the generator, the menu is show as above :
Pressure N2
=
xxxx mBar
Started
Stop
Where xxxx represents the output pressure read. The range goes from 20 to 9999mBar.
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Nitrogen Generator N2-Bora User’s Manual
Maintenance
- The button on the centre is used to enter the sub menu.
* Set PN2 Alarm
Running Time
Settings

Exit
Select
The selected item is marked with a "*" and this can be changed by scrolling the middle key.
Setting the N2 Pressure Alarm
Set PN2 Alarm
1000
Option
mBar

The value of the pressure alarm can be set by scrolling the values by using both  and .
Once the value is set, press "Option" button to select either "Save" the value or "Cancel" the
whole operation.
Remark: the default value after flashing the MCU is set to 1000 mBar; setting the PN2 alarm
does not require password; the delay is set to approx. six minutes.
Running Time
This submenu shows the total running time and the unit is hours. When 4000 working hours
are passed, it’s time to replace some consumables, as indicated in the next chapter, “Maintenance”.
This data can be reset at any time as follows :
1)
2)
3)
4)
5)
6)
7)
Switch off the N2 Generator
Press the left button and maintain it pressed ("Start button")
Switch on the N2 Generator
Stop pressing the left button
Enter "Running time" sub menu
Enter password (not the default one, but a new one inserted before!)
Type the "reset" button
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Nitrogen Generator N2-Bora User’s Manual
Maintenance
Remark: should the password be incorrect when pressing the "Reset" button, "Err" is shown
just after the wrong code: if the correct code is set, pressing this key will reset this data and
exit this sub menu.
Setting sub menu
Several tasks can set within this sub menu: start option, external remote configuration,
switch on/off the buzzer in case of alarm and changing password.
Start Option
Within this sub menu, when "Auto start ON" is set, the N2 Generator will automatically start
when switching on the N2 Generator. When "Auto Start OFF" is set, the N2 Generator will be
stopped when switching on the Generator.
Remark: this option is disabled if external remote control is enabled. In this case, pressing
"start" or "stop" key has no effect; the default setting after flashing the MCU is set to "Auto
start ON"; no password is required in this sub menu.
External remote control mode ("Remote Relay Mode")
Three choices are available : "Normally OPEN", "Normally CLOSE" and manual mode.
"Normally OPEN": the N2 generator automatically starts when the remote control is opened
and it stops when this remote control is closed. The maximum delay time is 2 seconds and
the manual mode is disabled.
"Normally CLOSE": the N2 generator automatically starts when the remote control is closed
and it stops when this remote control is opened. The maximum delay time is 2 seconds and
the manual mode is disabled.
If none of the option above is selected, the manual mode is enabled. This option is set by
default after flashing the MCU.
Remark: no password is required in this sub menu.
Pin out DB15 Remote Control
No alarm
Alarm
Control
Start / Stop
Remote
control:Pin
Pin3 3etand
Remote
control:
PinPin
4 4
Alarm Pin 1 or 2 and 9
Alarm Pin 1 or 2 and 6
1
6
DB9
DB15Remote
RemoteControl
Control
1. Sequence to start N2 generator :
Open the contact (leave 100mS) and maintain open contact.
2. Sequence to stop N2 generator :
Close the contact (leave 100mS) and maintain open contact.
Buzzer alarm
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Nitrogen Generator N2-Bora User’s Manual
Maintenance
User can set the buzzer in case of alarm. This setting does not require password.
Password setting
The password can be changed within this submenu. User needs to provide the old password
before submitting a new one. If user forget the this password, the default one (04122) can be
submitted.
Maintenance
With proper care and maintenance, your nitrogen generator should provide you with years of
trouble-free operation. There are no adjustments to be made to the generator. The only routine service operations are those described below.
Nonetheless, the generator should be inspected approximately every 3 years. Contact your
supplier.
Routine maintenance
The following section describes the maintenance operations required for the correct operation of the nitrogen generator.
Cleaning
The internal components of the nitrogen generator do not need to be cleaned and should not
be accessed by the user for cleaning. To clean the outside of the unit, only use a damp cloth
(no detergents, acids or aggressive or abrasive substances).
Service kits

Every 4000 hours the user must replace the filters of the compressor.

Every 8000 hours the user must replace the filters and the membrane of the compressor.

Every 24000 hours the user must replace the carbon molecular sieve (CMS).
The specific maintenance kits are available as spare part. These kits include all required
parts: they are listed in the “List of spare part”.
WARNING!
Only qualified personnel should perform service on this product. Any damage done to this
product as a result of improper maintenance procedure will void the warranty.
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Nitrogen Generator N2-Bora User’s Manual
Maintenance
4000 h service kit
a) Exchange of the compressor’s inlet filters
 Switch off the instrument and disconnect from the power line
 Open the hood
 Unscrew the 2 screws on rear of the unit
Screws
 Unscrew the 4 screws on right side and on rear of the unit
Screws
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Nitrogen Generator N2-Bora User’s Manual
Maintenance
 Exchange the filtering media & Silencer
Filter & Silencer
 Reassemble in reverse order.
b) Exchange of the automatic purge filtering media
 Switch off the instrument and disconnect from the power line
 Open the instrument
 Disconnect the 2 tubes fixed at the top of the automatic purge (quick connect fittings)
Filter & automatic purge
valve
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Nitrogen Generator N2-Bora User’s Manual
Maintenance
 Unscrew the 4 screws on top of the automatic purge
Screws
 Exchange the filtering media (white cylinder)
Filtering Media
 Reassemble in reverse order.
8000 h service kit
a) Exchange of the compressor’s inlet filter
See 4000 h service kit
b) Exchange of the automatic purge filtering media
See 4000 h service kit
c) Exchange of the membrane in the inside of each compressor
 Switch off the instrument and disconnect from the power line
 Open the instrument
 Unscrew the 4 screws on top of the pump
Screws
 Replace the seals and membranes
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Nitrogen Generator N2-Bora User’s Manual
Maintenance
Top view.
Parts were
turned over 180 °
CC
Attention: be very carefully to note the original position of the various parts.
 Reassemble in reverse order. Tighten screws a little at the time and crossover until tight.
Start the generator and test for proper operation
Returning the unit
In the event of any faults or damage, first notify the agent or distributor who supplied the
unit. Please also provide full details of the problem, including the model and serial number.
Instructions will then be provided for the service or the return of the unit. If the one year warranty has expired, or the fault is due to misuse of the unit, all repair and shipping costs are to
be paid by the customer. All other costs are borne by the customer, except as otherwise expressly agreed upon.
WARNING!
If the unit has to be transported, make sure to use suitable packaging.
The unit should be transported in an upright position; this warning should be reported on
the outside of the packaging.
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Nitrogen Generator N2-Bora User’s Manual
Spare parts list
Spare parts list
The table below provides a list and description of the spare parts of the nitrogen generator.
List of spare parts – N2-Bora
p/n
DESCRIPTION
NB-404
4000 h service kit for N2-BORA-500 (filters)
NB-405
4000 h service kit for N2-BORA -750/ICP (filters)
NB-401
8000 h service kit for N2-BORA-500 (filters + compressor kit)
NB-402
8000 h service kit for N2-BORA-750/ICP (filters + compressor kit)
NB-408
24000 h CMS tubing kit complete
IMPORTANT!
The manufacturer reserves the right to change or modify its products without prior notice.
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