O2 N2 SITE - On Site Gas Systems
O2 N2 SITE
Gas Systems
Membrane Nitrogen Generator
Owner’s Manual
All “NM” Models
Manufactured by:
O2N2 SITE Gas Systems, Inc.
35 Budney Road, Budney Industrial Park, Newington, CT 06111 USA
Telephone: +1-860-667-8888 / Fax: +1-860-667-2222
E-mail: [email protected] - Web site: www.onsitegas.com
PROPRIETARY NOTICE: All information herein is the property of O2N2 SITE Gas Systems and
must be kept confidential and not be disclosed without O2N2 SITE ’s agreement nor used, in
whole or in part, in manufacturing or selling gas separation equipment without the express written
permission of O2N2 SITE. O2N2 SITE authorizes the necessary and reasonable use of this
document, and information herein, solely for the evaluation, installation, operation, and
maintenance of O2N2 SITE ’s nitrogen generation systems. No other use is authorized.
1
Table of Contents
1
INTRODUCTION........................................................................................3
Company Presentation ...........................................................................3
Safety Information ..................................................................................4
Limits of Liability .....................................................................................5
Warranty .................................................................................................6
Service Return Policy .............................................................................7
UNPACKING AND INSPECTING ..............................................................7
SITE AND UTILITY REQUIREMENTS.......................................................8
3.1
Air Supply ...............................................................................................8
3.2
Additional Piping and Hoses...................................................................8
3.3
Electrical Supply .....................................................................................8
3.4
Site Specifications ..................................................................................9
SYSTEM ASSEMBLY ..............................................................................10
SYSTEM OVERVIEW ..............................................................................11
5.1
Controls and Instrumentation Overview................................................11
5.1.1
Main Power Switch ........................................................................11
5.1.2
Power Light ...................................................................................11
5.1.3
Hour Meter ....................................................................................11
5.1.4
Pressure Switch.............................................................................11
5.1.5
Standby Light ................................................................................12
5.1.6
Air Supply Pressure Gauge ...........................................................12
5.1.7
Peak Pressure Gauge ...................................................................12
5.1.8
Tank Pressure Gauge ...................................................................12
5.1.9
Inlet Air Pressure Regulator ..........................................................12
5.1.10 Product Pressure Regulator ..........................................................12
5.1.11 Product Oxygen Analyzer..............................................................13
PRINCIPLES OF OPERATION................................................................14
GENERATOR OPERATION ....................................................................15
7.1
Start-Up ................................................................................................15
7.1.1
Initial Start-Up................................................................................15
7.1.2
Normal Start-Up.............................................................................16
7.2
Shutdown..............................................................................................17
7.2.1
Emergency Shutdown ...................................................................17
7.2.2
Normal Shutdown ..........................................................................17
MAINTENANCE .......................................................................................18
8.1
Maintenance Overview .........................................................................18
8.1.1
Nitrogen Generator........................................................................19
8.2
Filter Removal Procedure .....................................................................20
TROUBLE SHOOTING ............................................................................22
1.1
1.2
1.3
1.4
1.5
2
3
4
5
6
7
8
9
2
1
INTRODUCTION
Congratulations on your purchase of an O2N2 SITE Gas Systems, Inc.
Membrane type Nitrogen Generator. This simple, turnkey machine
provides a cost-effective means for on-site generation of nitrogen. The
Nitrogen Generator is based on using the latest membrane technology to
separate nitrogen from the other gases contained in air. The Nitrogen
Generator uses one or more permeable hollow fiber type membrane
modules to separate compressed air into a high-pressure nitrogen product
stream and a low-pressure oxygen enriched waste stream. Particulate and
activated carbon filters are included to remove impurities from the feed air.
Each Nitrogen Generator comes pre-tested and fine tuned to meet the
customer specified nitrogen flow rate and purity.
Since the system does not contain any moving parts, maintenance and
repairs are minimal. Maintenance is simple yet necessary. Air compressor
and filter maintenance procedures are especially important and should be
followed carefully. If the recommended maintenance procedures are
followed, your nitrogen generator will provide you with many years of reliable
service.
1.1 Company Presentation
O2N2 SITE Gas Systems is established as a world leader in the design and
supply of systems for generation of oxygen and nitrogen. We have been
manufacturing oxygen and nitrogen generators since 1987. Information
about our products and our company can be found at our web site:
www.onsitegas.com
O2N2 SITE Gas Systems activities frequently include full responsibility for
conceptual and detail engineering design, procurement, fabrication, supply
and installation of packages for various industries worldwide.
O2N2 SITE Gas Systems’ Nitrogen Generator offer operators the benefits of
this advanced, but simple technology.
The principle advantages of
Membrane systems are:
-
Compact
Low weight
Safe, reliable operation
No Moving Parts
Simple maintenance
Ease of operation
Infinite Turndown
Rapid start-up
3
1.2 Safety Information
The following section outlines the basic safety considerations regarding use
of your Nitrogen Generator. Please refer to the technical references for
additional information.
Read carefully and act accordingly before installing, operating or
repairing the unit.
· The operator must employ safe working practices and rules when
operating the nitrogen generator.
· The owner is responsible for maintaining the unit in a safe operating
condition.
· Always use approved parts when performing maintenance and
repairs. Make sure that replacement parts meet or exceed the
pressure requirements.
· Only authorized, trained and competent individuals must perform
installation, operation, maintenance and repair.
· Completely depressurize the generator, tanks, and lines prior to
performing any mechanical work, including changing the filters. The
nitrogen must be vented to the outside or to a large, well-ventilated
room to avoid suffocation due to lack of oxygen.
· Safety glasses should be worn if the cabinet door is open while the
machine is operating.
WARNING
Pressurized gases are contained within the generator and the receiver
and product tanks. High-pressure gases are dangerous and may
cause injury or death if handled or used inappropriately.
· Never allow high-pressure gas to exhaust from an unsecured hose.
An unsecured hose may exhibit a whipping action, which can cause
serious injury. If a hose should burst during use, immediately close
all isolation valves.
· Never disable or bypass any safety relief valves on the air receiver or
product tanks.
4
· Always make certain that the nitrogen generator is unplugged prior
to performing any electrical work.
NOTE
If any statement or specification within this booklet, especially with
regard to safety, does not agree with legislation or standard industry
practices, the more demanding shall apply.
1.3 Limits of Liability
Buyer's exclusive remedy for all claims shall be for damages, and seller's
total liability for any and all losses and damages arising out of any cause
whatsoever including, without limitation, defects in or defective performance
of the system, (whether such claim be based in contract, negligence, strictly
liability, other tort or otherwise) shall in no event exceed the purchase price
of the system in respect of which such cause arises or, at seller's option,
the repair or replacement of such; and in no event shall seller be liable for
incidental, consequential or punitive damages resulting from any such
cause.
Seller shall not be liable for, and Buyer assumes all liability for, the
suitability and the results of using Nitrogen by itself or in any manufacturing
or other industrial process or procedure, all personal injury and property
damages connected with the possession, operation, maintenance, other
use or resale of the System. Transportation charges for the return of the
System shall not be paid unless authorized in advance by Seller.
NOTE
Any modifications made by customer without the consent of O2N2
SITE will void the product purity and output specifications.
5
1.4 Warranty
The Nitrogen Generator, excluding air supply system, is warranted against
defects in materials and workmanship, under normal use and operation, as
applicable on the warranty listed below. All compressors and dryers are
covered by the original equipment manufacturer's warranty.
The O2N2 SITE Gas Systems Warranty includes the following:
Free repair or replacement of component parts where defects occur
within the first twelve (12) months of operation or twelve (12) months
from the date of invoice which ever comes first.
These warranties shall be null, void, inoperative, and not binding upon O2N2
SITE Gas Systems, Inc. if a defect or malfunction occurs in the product or
any part thereof from any feed air malfunction, or improper filter element
maintenance, or repair, attempted repair, adjustment or servicing by
anyone other than an authorized representative of O2N2 SITE Gas Systems,
or external causes. Said warranty shall extend and apply to the Nitrogen
Generator only while said system is owned and used exclusively by the
original purchaser.
NOTE
THERE ARE NO EXPRESS WARRANTIES BY ON SITE GAS SYSTEMS
INC, OTHER THAN THOSE SPECIFIED HERE. NO WARRANTY OF
TITLE AS PROVIDED IN THE UNIFORM, COMMERCIAL CODE SHALL
BE IMPLIED OR OPTHERWISE CREATED UNDER THE UNIFORM
COMMERCIAL CODE, INCLUDING BUT NOT LIMITED TO WARRATY OF
MERCHANTABILITY AND WARRANTY OF FITNESS FOR A
PARTICULAR PURPOSE.
6
1.5 Service Return Policy
If it is necessary to return a system for service, follow the procedure given
below. This procedure must be followed when returning a system for
service.
· If the system cannot be repaired at the site, then the owner must
obtain a written Return Goods Authorization number, which
references the model and serial number, from O2N2 SITE Gas
Systems Inc. No items will be accepted for service or credit unless
prior written authorization has been issued by O2N2 SITE Gas
Systems Inc.
· All items are to be returned with the original packaging material if
possible. Make sure that all items are packaged for safe return to
O2N2 SITE Gas Systems Inc. O2N2 SITE Gas Systems, Inc. will not
be responsible for damages, which occur in transit. Any damage that
occurs to the system because of failure to adhere to this procedure
will be the sole responsibility of the customer. Contact O2N2 SITE
Gas Systems Inc. for a return shipping address.
· Shipping charges must be prepaid on all returns.
2
UNPACKING AND INSPECTING
The Nitrogen Generator is shipped in a single crate, including the
accessory kit. If you ordered optional air receiver or product receiver tanks,
these would be shipped in a separate crate. The contents of the crate(s)
should be inspected upon delivery to assure that no damage has taken
place during transit. Save the carton and wrapping, as it may be necessary
to return the generator in event of shipping damage. If any components are
found to be damaged, the carrier should be notified immediately. The
individual pieces should be checked against the packing list. If any
discrepancy is found, contact your local distributor, or O2N2 SITE Gas
Systems Inc. at (860) 229-2799. Please include the model number and the
serial number with all correspondence.
7
3
SITE AND UTILITY REQUIREMENTS
The following requirements must be met to enable the Nitrogen Generator
to perform at its rated capacity. Deviation from these requirements may
result in poor performance, injury to persons or machinery, and voiding of
warranty.
3.1 Air Supply
Air supplied to the generator must be between 100 °F / 38 °C and 33° F /
0.5 °C, with a water dew point of 40°F / 5°C or below. Air at temperatures
higher or lower than this may cause damage not covered by warranty.
Likewise, moisture content higher than that specified may damage the
membrane separators and void the warranty. Air pressure, air receiver and
nitrogen receiver vessels must be compatible with the generator. Use of a
correctly sized refrigerant dryer will ensure that air meets specified
standards.
The performance of our Membrane type Nitrogen Generators is based on
minimum 100 psig / 6.9 bar g operating pressure. Operation at higher or
lower pressure will result in a nitrogen production above or below design.
Air consumption for each Nitrogen Generator depends on nitrogen product
purity and flow rate. Please consult O2N2 SITE Gas Systems for details.
3.2 Additional Piping and Hoses
The air supply piping components must be capable
required amount of feed air at the required pressure
generator inlet connection. If the length of piping from
greater than 50 feet, an air supply line one size larger
Generator inlet air nozzle size should be used.
of supplying the
measured at the
the air receiver is
than the Nitrogen
3.3 Electrical Supply
Power supply must be 110 V or 220 V / 1 ph / 50 - 60 Hz as labeled on the
unit. Power consumption is less than 0.5 kW.
8
3.4 Site Specifications
Select a non-hazardous area indoors for installation which remains above
33 °F / 0.5°C and below 100 °F / 38 °C. Adequate space should be
provided around the generator for access and routine maintenance. Ensure
that there is enough space for the air receiver and product receiver skid next
to the unit.
The exhaust piping from the nitrogen generator may be vented outside, but
any additional piping used should be the same size as the exhaust piping
supplied with the generator or larger depending on the length of the pipe.
Exhaust piping should not have any restrictions or valves, and should be as
short as possible. The exhaust gas oxygen content is 30 - 40%.
9
4
SYSTEM ASSEMBLY
This section provides a step-by-step procedure for easy assembly of the
Nitrogen Generator with optional air supply system and tanks.
1. Position the nitrogen generator in an area as described in Section 3.4.
Lift the nitrogen generator carefully to avoid damaging piping or control
system.
2. Carefully lift the air receiver and nitrogen receiver (if supplied) and
position next to the nitrogen generator skid. The tanks should be
located as close as possible to the unit.
NOTE
Carefully attach lifting devices and any rigging to ensure that piping
and valves are not damaged.
3. Install the air compressor and refrigerant dryer (if supplied) in
accordance with the manufacturer’s instructions. Attach air supply
connections to the Nitrogen Generator. Install suitable piping or hoses
from the compressor to the dryer, from the dryer to the air receiver,
and from the air receiver to the Nitrogen Generator. The connections
may be "hard plumbed" by the user, if desired.
NOTE
Use of piping sizes smaller than the recommended size will
significantly decrease system performance.
WARNING
Use only materials with compatible pressure rating on components
on the product pipe lines.
4. Install relief valve on the air receiver and nitrogen receiver if not
provided by O2N2 SITE Gas Systems.
5. Check all fittings for leaks using a leak detecting solution.
6. A qualified electrician should install all electrical connections and the
electrical power supply. Plug in the nitrogen generator into an
approved outlet of the correct voltage and frequency. Connect the
optional compressor(s) and dryer to an appropriate power supply
(according to the requirements stated on the motor nameplate).
10
5
SYSTEM OVERVIEW
5.1 Controls and Instrumentation Overview
This section describes the function of each control on the Membrane
Nitrogen Generator. The location and purpose of all instrumentation is also
listed.
Controls for supporting equipment, such as the compressor and dryer, are
not included in this section. Please consult the original manufacturer’s
instructions, located in the appendices, for further information.
5.1.1
Main Power Switch
This switch supplies power to the nitrogen generator. The green
“Power Light” is lit when the switch is “ON”. The “Main Power”
switch is located on the front of the control panel.
The “Main Power” switch allows the operator to disconnect power
from the generator. The automatic on/off valve in the feed air
supply line will close whenever the switch is turned “OFF”.
Nitrogen production will stop. The switch must be returned to the
“ON” position to restart the unit.
5.1.2
Power Light
This green indicator is lit when the “Main Power” switch is “ON”.
This light uses a 110 or 220 volt bulb.
5.1.3
Hour Meter
This meter shows number of hours the generator has produced
nitrogen and excludes standby time.
5.1.4
Pressure Switch
The nitrogen product pressure switch controls the on and off
pressure range of the Nitrogen Generator. The pressure switch is
installed in the nitrogen product line inside the valve panel.
The pressure switch can be set to turn the unit off and on at desired
product pressure levels. The factory settings call for the generator
to switch “OFF” when product pressure exceeds 75 psig and to
switch “ON” when product pressure falls about 7 psi.
11
5.1.5
Standby Light
This amber indicator is lit when the nitrogen product receiver
pressure is above the high set point of the pressure switch. This
light uses a 110 or 220 volt bulb.
5.1.6
Air Supply Pressure Gauge
This gauge monitors the feed air pressure. The inlet air pressure
gauge is located on the optional air supply receiver.
5.1.7
Peak Pressure Gauge
This gauge monitors the membrane operating pressure. The “Peak
Pressure” gauge is located on the front of the control panel.
5.1.8
Tank Pressure Gauge
The “Tank Pressure” gauge monitors the pressure of the nitrogen
product. The gauge is located on the front of the control panel.
5.1.9
Inlet Air Pressure Regulator
The regulator allows the operator to adjust the pressure of the feed
air to the pressure range desired. The inlet air pressure regulator
(if supplied) is located inside the generator.
Turning the knob on the bottom of the regulator can change the
pressure. The regulator is set at the factory but may require minor
adjustment in the field. Note that the output pressure of the
compressor limits the maximum pressure.
5.1.10 Product Pressure Regulator
The regulator sets the delivery pressure of the nitrogen product.
The regulator is located on the optional product receiver tank.
Please refer to Section 1.2 for safety information regarding highpressure nitrogen.
12
5.1.11 Product Oxygen Analyzer
The oxygen analyzer (optional) receives a small sample flow from
the product receiver tank to continuously monitor the product
nitrogen purity. The oxygen analyzers used are equipped with
alarms that will be activated when the oxygen content gets too high.
The oxygen analyzer display is located on the front of the control
panel. The sensor is installed inside the panel. The sample must
be connected to the 5/32” tube located at the side of the control
panel. It should be supplied from the product receiver tank through
5/32” tubing.
13
6
PRINCIPLES OF OPERATION
The O2N2 SITE Nitrogen Generator uses state of the art technology to
provide the end user with a reliable source of nitrogen. An overview of the
operation of the generator is given below.
The Nitrogen Generator is a membrane type system. The Nitrogen
Generator consists of one or more permeable hollow fiber membrane
separator modules, valves, air filters, main pressure regulator, and a product
receiver tank (optional). Dry, compressed air (78%nitrogen, 21% oxygen,
<1% argon) at about 100 psig / 6.9 bar g is passed through the air filters,
which remove particles and oil vapor, and then through the air inlet regulator
(if supplied), which reduces the air to the final operating pressure. It is
important to maintain the inlet air at the correct pressure; otherwise,
generator performance may deviate from design. A heating system is
included to maintain a constant air temperature typically between 75 - 130
°F / 24 - 54 °C.
Clean and dry air enters one end of the bore side of a hollow fiber type
membrane bundle inserted in an enclosure, which is arranged geometrically
the same way as a shell and tube heat exchanger. As air flows along the
bore side of the fibers, oxygen, carbon dioxide and water vapor contained in
the air, permeate faster than nitrogen to the low-pressure side of the fibers.
The bore side air is gradually depleted in oxygen and other fast permeating
gases and enriched in nitrogen. Fast permeating waste gas enriched in
oxygen is vented to the atmosphere at ambient pressure. Nitrogen product
gas, with a desired purity (95 – 99.9% as required by customer), is collected
at the high-pressure side of the membrane separators and piped to a
receiver or directly to the consumer. Nitrogen purity and flow rate can be
checked before the nitrogen is supplied to the consumer.
The membrane separation process is a continuous process that supplies
nitrogen gas for as long as the unit is in operation.
14
7
GENERATOR OPERATION
This section describes the procedure for starting, running, and stopping the
Nitrogen Generator. The operator should notify personnel in the area that
the generator will be started and make sure the start-up will not interfere
with any other operations.
7.1 Start-Up
This section describes the necessary steps of both the initial start-up and a
normal routine start-up. If this is the first time the unit has been started,
follow the Initial Startup procedure.
7.1.1
Initial Start-Up
1. Verify that power supply is 110 V or 220 V / 1 ph / 50 - 60 Hz as
labeled on the unit.
2. Turn on the compressed air supply. Follow air compressor
manufacturer's start-up instructions (see your manufacturer's
manual). Check that air pressure is in the range of 90-175 psig
/ 6.2 – 12.1 barg [620-1210 kPa]. Open the air supply valve.
WARNING
Shut off the main air supply valve and depressurize the
generator before repairing any leaks.
NOTE
During the start up sequence, check for leaks in all pipefittings and valves. Remember, even a small leak on the
product nitrogen piping can severely reduce production
capacity!
3. Turn the Main Power switch to the “OFF” position.
4. Plug the power cord into a properly fused and grounded
electrical outlet of the correct voltage as marked on the unit.
5. Turn Main Power switch to “ON”. Observe that the power
indicator light is on. If light is off, check fuse or light bulb.
6. Pressure will build up and nitrogen will start flowing to the
product tank.
15
7. When Product Pressure reaches 70 to 90 psig / 4.8 to 6.7 bar g.
(480 – 670 kPa), the amber light should go on and nitrogen
production will stop. When product is used and Product
Pressure falls about 10 psi below the high set point, the amber
light will go off and nitrogen production will resume. The
pressure switch may be adjusted to other desired set pressures.
NOTE
When the nitrogen generator is turned on for the first time or
after a prolonged shutdown period, it is likely that the
Product Receiver is full of air. Product purity can be
increased by purging the Product Receiver to safe area /
outside the building for approximately 15 minutes before
using the product.
7.1.2
Normal Start-Up
Follow this procedure to start the generator for normal operation. If
this is the first time the unit has been started, follow the Initial
Startup procedure.
1. Open the air isolation valve.
2. Turn on the Main Power switch.
3. Open any shut off valves in the product nitrogen line to the
user’s piping system. Allow the system purity to rise before
using product.
NOTE
If the generator or any part of the system has been opened to
the atmosphere, the system must be purged of any residual
air.
16
7.2 Shutdown
This section describes how to perform both an emergency shutdown and a
normal shutdown.
7.2.1
Emergency Shutdown
In case of an emergency, simply turn the Main Power Switch to
OFF. This will stop all generator functions immediately. Nitrogen
supply can be shut off manually closing the nitrogen product ball
valve located on the optional product receiver tank.
7.2.2
Normal Shutdown
This procedure allows the generator to be restarted more quickly
than execution of an emergency or abnormal shutdown procedure
would.
1. Turn the Main Power switch to “OFF”. There is no need to close
the nitrogen product ball valve.
WARNING
The generator will remain pressurized after shut down. Before
performing any maintenance or opening any piping systems, always
depressurize the system. Failure to do so may result in injuries.
17
8
MAINTENANCE
O2N2 SITE Gas Systems Generators will provide many years of trouble-free
operation if the recommended maintenance is performed thoroughly and
regularly. In addition to the procedures given below, the customer must
also perform all maintenance recommended by the manufacturers of the
component items employed in the O2N2 SITE Gas Systems Generators.
Note that where any component manufacturer specifications are different
from those of O2N2 SITE Gas Systems, the more demanding schedule
should be adopted.
WARNING
Read and follow all safety procedures given below and in Section 1.2,
Safety Information.
8.1 Maintenance Overview
It is strongly recommended that all maintenance work be recorded in the
Maintenance Logbook. This procedure will assure that a good maintenance
policy is employed and will provide valuable information should
troubleshooting become necessary.
The content of each type of maintenance activity is described below.
WARNING
Before attempting to perform any maintenance procedures, make
certain that the air supply is turned OFF, the electrical source is
locked-out, and the nitrogen generator system is depressurized!
18
8.1.1
Nitrogen Generator
The nitrogen generator is a rugged unit and requires only minimal
maintenance. Failure to follow the maintenance schedule may
result in damage to the unit and voiding the warranty.
Every day:
1.
2.
3.
4.
Check for air and product leaks.
Check instrument air pressure.
Visually check control panel.
Record nitrogen concentration and flow rate; operating or
ambient temperature, feed air pressure and product tank
pressure.
5. Verify that the automatic filter drain is working properly.
6. Manually operate air receiver drains.
Every month:
1. Clean filter bowls.
2. Calibrate optional oxygen
manufacturer’s instructions.
analyzer
Three months:
1.
2.
3.
4.
Change Particulate pre filter element.
Operate safety valves.
Operate manual valves.
Check for leaks and repair if necessary.
Six months:
1. Change Coalescing filter element
19
as
per
attached
Annually:
1. Disassemble and inspect all air-operated valves; contact factory
for replacement parts if needed.
2. Test the air pilot valve(s).
3. Check for air and product leaks.
4. Change activated carbon tower and/or activated carbon filter
element upstream of the membrane separator(s). The steel
activated carbon towers should be returned to O2N2 SITE for
refill. We recommend keeping a filled, spare tower in stock to
reduce downtime during replacement.
5. Check O2 analyzer sensor for proper operation as per
manufacturer’s instructions and order replacement.
Three years:
1. Install repair kits in the air-operated valve.
8.2 Filter Removal Procedure
Clean filter elements are vital to good system performance. The filters
remove particulates as well as liquid water and oil. The prefilter removes
particles down to 5 microns in size. It should be changed every 3 months.
The coalescing filter removes particles down to 0.01 microns in size. The
life of the coalescing filter is dependent on how well the prefilter performs its
job; it will last for 6 months when the prefilter is regularly maintained.
The activated carbon tower and/or activated carbon filter element removes
oil vapor down to about 0.003 ppm. The life of the activated carbon tower
and/or activated carbon filter element is dependent on the oil content in the
feed air. An activated carbon tower will typically last for 12 months when
the upstream filters are regularly maintained.
WARNING
Do not try to remove filter bowls unless both the Air Supply gauge and
the Process Pressure gauge clearly read zero psig.
20
1. Disconnect the tubes from the bottom of the bowls.
2. To remove the bowls, push the bowl latch down and rotate the bowl
while pulling down.
3. Inspect the bowls. If the drain system is working properly, the bowls
should be empty.
4. Replace any filter element that looks damaged or excessively dirty.
NOTE
A plugged drain system will cause water and oil to carry over into the
adsorber which will cause permanent damage to the adsorbent.
Such damage is not covered by the Manufacturer's Warranty. Use
of filters other than those specified by O2N2 SITE Gas Systems
could result in damages not covered by the warranty.
5. Wash the bowls in soapy water and rinse thoroughly.
6. Reconnect the drain tubes. Make sure the bowl latches are securely
locked in place. Be careful to avoid cutting O-rings
7. Remove activated carbon tower and replace with new activated carbon.
8. Slowly open the air inlet valve to pressurize the bowls. Examine for leaks
and tighten if needed.
21
9
TROUBLE SHOOTING
This section enables the operator to determine the cause of operation
problems and suggests remedies for the problems. If there are several likely
causes, investigate the simpler solutions first. Regardless of the type of
malfunction, a person who is thoroughly familiar with the system performs
the troubleshooting best. If further assistance is required, contact your local
distributor or O2N2 SITE Gas Systems Inc.
Symptom
Nitrogen generator
not running
Probable Cause
Low voltage or
low amperage
Corrective Action______
Check electrical source
Circuit breaker
tripped
Reset circuit breaker
Fuse blown
Replace fuses
located inside control
enclosure.
Main power is OFF
Turn Nitrogen generator
power switch ON.
Air on/off valve not
opening
Dirty or defective valve;
clean or replace
Defective wiring
Check wiring connections
__________________________________________________________
Reduce standby pressure
Nitrogen generator N2 pressure switch
runs continuously;
set too high
amber light OFF
Replace switch
Defective N2 pressure
switch
Symptom
Excessive product
usage
Reduce product
consumption
Product line leak
Repair leak
Air pressure too low
Increase air regulator
pressure
Defective wiring
Check wiring connections
Probable Cause
Corrective Action______
22
Low product flow
Feed air flowrate
Adjust air supply pressure
is too low
and flow
____________________________________________________________
Low product purity
Product flow too high
Decrease product flow
O2 analyzer malfunction
Check operation and
calibration
Feed pressure too low
Increase operating
pressure or flow
Air on/off valve not
opening fully
Dirty or defective valve;
clean or replace
No signal; check valve
using manual override;
replace coil or valve
Oil or water in unit
Contact O2N2 SITE
____________________________________________________________
Filter drains remains Drain valve dirty
Clean valve
open
____________________________________________________________
Filter drain does not Drain valve plugged
Clean valve
open
Low operator air
Increase regulator
pressure
pressure
Tubing plugged or
Pinched
23
Replace tubing
*****CAUTION*****
DO NOT DISCONNECT OR
TURN OFF AIR TO GENERATOR
UNLESS GENERATOR POWER SWITCH
IS TURNED OFF
24
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