On Site Gas Systems
PRO-4 Oxygen Generation System
(Pro-4-OGS)
Operations Manual
Manufactured by:
On 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: info@onsitegas.com - Web site: www.onsitegas.com
PROPRIETARY NOTICE: All information herein is the property of On Site Gas Systems and must
be kept confidential and not be disclosed without On Site’s agreement nor used, in whole or in
part, in manufacturing or selling gas separation equipment without the express written permission
of On Site. On Site authorizes the necessary and reasonable use of this document, and
information herein, solely for the evaluation, installation, operation, and maintenance of On Site’s
Pro-4-OGSs. No other use is authorized.
Table of Contents
1 INTRODUCTION
1.1
Company Presentation
1.2
Safety Information
1.3
Limits of Liability
1.4
Warranty
1.5
Service Return Policy
2 UNPACKING AND INSPECTING
3 SITE AND UTILITY REQUIREMENTS
3.1
Air Supply
3.2
Additional Piping and Hoses
3.3
Electrical Supply
3.4
Site Specifications
4 SYSTEM ASSEMBLY
4.1
Installation
5 SYSTEM OVERVIEW
5.1
Controls and Instrumentation Overview
5.1.1
Pro-4-OGS Power Switch
5.1.2
Power Light
5.1.3
Pressure Switch
5.1.4
Standby Light
5.1.5
Air Tank Pressure Gauge
5.1.6
Peak Pressure Gauge
5.1.7
Oxygen Tank Pressure Gauge
5.1.8
Inlet Air Pressure Regulator
5.1.9
Oxygen Tank Pressure Regulator
5.1.10 Product Oxygen Analyzer
5.2
Control Time
6 PRINCIPLES OF OPERATION
7 GENERATOR OPERATION
7.1
Startup
7.1.1
Initial Startup
7.1.2
Normal Startup
7.2
Shutdown
7.2.1
Emergency Shutdown
7.2.2
Normal Shutdown
7.2.3
Maintenance, Storage, or Shipping Shutdown
8 CYLINDER FILLING
8.1
Cylinder Loading
8.2
Booster Operation
8.3
Cylinder Removal
9 MAINTENANCE
10 TROUBLE SHOOTING
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1 INTRODUCTION
Congratulations on your purchase of an On Site Gas Systems, Inc.
Pressure Swing Adsorption (PSA) type Pro-4-OGS. This simple, turnkey
machine provides a cost-effective means for on-site generation of oxygen.
The Pro-4-OGS is based on using the latest PSA technology and utilizes
Zeolite Molecular Sieve (ZMS) to separate the oxygen from the other gases
contained in air. The Pro-4-OGS uses two beds of ZMS to separate
compressed air into a high-pressure (40-50 PSIG) oxygen product stream
and low-pressure nitrogen enriched waste stream.
Particulate and
coalescing filters are included to remove impurities from the air. Each Pro4-OGS comes pre-tested and fine-tuned to meet the customer specified flow
rate at 95% oxygen purity (99% Pro-4-OGSs are available).
Since the system contains very few 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 Pro-4-OGS will provide you with many years of reliable
service.
1.1
Company Presentation
On Site Gas Systems is established as a world leader in the design and
supply of systems for generation of nitrogen and oxygen. We have been
manufacturing Nitrogen and Pro-4-OGSs since 1987. Information about our
products and our company can be found at our web site:
www.onsitegas.com
On 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.
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On Site Gas Systems’ Pro-4-OGSs offer operators the benefits of this
advanced, but simple technology. The principle advantages of PSA
systems are:
1.2
Compact
Low weight
Safe, reliable operation
Simple maintenance
Low operating pressure (65 psig vs. 2200 psig for cylinders)
Ease of operation
Rapid startup
Safety Information
The following section outlines the basic safety considerations regarding use
of your Pro-4-OGS. 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 Pro-4-OGS.
· 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.
WARNING
Use only materials with compatible pressure rating on product
pipelines and components.
All parts must be free of grease/oil.
· Completely depressurize the generator, tanks, and lines prior to
performing any mechanical work, including changing the filters.
· Safety glasses should be worn if the cabinet door is open while the
machine is operating.
4
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.
· Always make certain that the Pro-4-OGS 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 oxygen 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.
5
NOTE
Any modifications made by customer without the consent of ON
SITE will void the product purity and output specifications.
1.4
Warranty
The Pro-4-OGS, excluding air supply system, is warranteed 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 On 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 On
Site Gas Systems, Inc. if a defect or malfunction occurs in the product or
any part thereof from any air malfunction, or improper filter element
maintenance, or repair, attempted repair, adjustment or servicing by
anyone other than an authorized representative of On Site Gas Systems, or
external causes. Said warranty shall extend and apply to the Pro-4-OGS
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 OTHERWISE CREATED UNDER THE UNIFORM
COMMERCIAL CODE, INCLUDING BUT NOT LIMITED TO WARRANTY
OF MERCHANTABILITY AND WARRANTY OF FITNESS FOR A
PARTICULAR PURPOSE.
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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 On Site Gas Systems
Inc. No items will be accepted for service or credit unless prior
written authorization has been issued by On 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 On
Site Gas Systems Inc. On 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 On SIte Gas
Systems Inc. for a return shipping address.
· Shipping charges must be prepaid on all returns.
2 UNPACKING AND INSPECTING
The Pro-4-OGS is shipped in a single crate, including the accessory kit.
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 On Site Gas Systems Inc. at (860) 667-8888. Please include
the model number and the serial number with all correspondence.
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3 SITE AND UTILITY REQUIREMENTS
The following requirements must be met to enable the Pro-4-OGS 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 supply is incorporated into the Pro-4-OGS. In the event of compressor
failure, external compressed air may be supplied to the oxygen generator.
Air supply must be clean dry air, with a dew point less than 40º F at 90120psi.
3.2 Electrical Supply
Power supply must be 230V/1ph/50Hz as labeled on the unit. The Pro-4OGS consumes less than 25 amps.
3.3 Site Specifications
Select a non-hazardous area indoors for installation which remains above
33F/0.5C and below 140F/60C. Adequate space should be provided
around the Pro-4-OGS for access and routine maintenance.
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4 SYSTEM ASSEMBLY
4.1
Installation
This section provides a step-by-step procedure for easy assembly of the
Pro-4-OGS.
1. Position the Pro-4-OGS in an area as described in Section 3.4. Lift the
Pro-4-OGS carefully to avoid damaging piping or control system. The
Pro-4-OGS is designed with fork lift slots for lifting.
NOTE
Carefully attach lifting devices and any rigging to ensure that piping
and valves are not damaged.
7. A qualified electrician should install all electrical connections and
the electrical power supply, if applicable. Plug in the Pro-4-OGS
into an approved outlet of the correct voltage and frequency.
Pro-4-OGS
Generator
Feed Air
Compressor
2P Booster
Cylinder Rack
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5
5.1
SYSTEM OVERVIEW
Controls and Instrumentation Overview
This section describes the function of each control on the PSA Pro-4-OGS.
The location and purpose of all instrumentation is also listed. A
Programmable Logic Controller (PLC) is located inside the control enclosure
automatically controls your On Site Pro-4-OGS. Do not attempt to alter the
PLC; any changes made will void the performance specifications.
Controls for supporting equipment, such as the compressor and booster,
are not included in this section. Please consult the original manufacturer’s
instructions, enclosed with the system, for further information.
5.1.1
Pro-4-OGS Power Switch
This switch supplies power to the Pro-4-OGS. The green “Power
Light” is lit when the switch is “ON”. The “Pro-4-OGS Power Switch”
is located on the front of the Pro-4-OGS control panel.
The “Main Power” switch allows the operator to disconnect power
from the generator. PSA cycling will stop immediately whenever the
switch is turned “OFF”. Oxygen production will stop; airflow from Air
Tank must be stopped manually using the isolation valve. The
isolation valve must be opened and the switch must be returned to
the “ON” position before the unit can be restarted.
Pro-4-OGS Generator Control Panel
5.1.2
Power Light
This green indicator is lit when the “Main Power” switch is “ON”.
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5.1.3
Pressure Switch
The oxygen tank pressure switch controls the on and off pressure
range of the Pro-4-OGS. The pressure switch is installed in the
oxygen product line inside the cabinet.
The pressure switch is set to turn the unit off and on at desired tank
pressure levels. The factory settings call for the generator to switch
“OFF” when tank pressure reaches approximately 60 psig and to
switch “ON” when it falls approximately 8 PSIG below the preset
“OFF” level.
5.1.4
Standby Light
This amber indicator is lit when the oxygen product receiver
pressure is above the high set point of the pressure switch.
5.1.5
Air Tank Pressure Gauge
This gauge monitors the air pressure. The inlet air pressure gauge
is located on air tank and can be viewed between the Pro-4-OGS
generator and 2P booster. Typically this gauge should read from
90psi to 125psi.
5.1.6
Peak Pressure Gauge
This gauge monitors the pressure changes in the adsorber beds
throughout the cycle. The “Peak Pressure” gauge is located on the
front control panel of the Pro-4-OGS. Typically this gauge should
read from 45psi to 60psi
5.1.7
Oxygen Tank Pressure Gauge
The “Tank Pressure” gauge monitors the pressure of the oxygen
product. The gauge is located on the front of the control panel of
the Pro-4-OGS. Typically this gauge should read from 45psi to
60psi.
5.1.8
Inlet Air Pressure Regulator
The regulator allows the operator to adjust the pressure of the air
to the pressure range desired. The inlet air pressure regulator is
located outside of the cabinet of the Pro-4-OGS. Typically this
gauge should read from 50psi to 70psi
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.
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5.1.9
Oxygen Tank Pressure Regulator
The regulator sets the delivery pressure of the oxygen product. The
regulator is located on the product receiver tank. Please refer to
Section 1.2 for safety information regarding high-pressure oxygen.
This regulator is set at 40psi for feed to the 2P booster.
5.1.10 Product Oxygen Analyzer
The oxygen analyzer receives a small sample flow from the product
receiver tank to continuously monitor the product oxygen purity.
The oxygen analyzers used are equipped with two alarm levels that
will be activated when the oxygen content gets too low, the two
alarm levels are set at 89% and 85%. The oxygen analyzer display
is located on the front of the control panel. The sensor is installed
inside the generator.
5.2
Control Time
A Programmed Logic Controller (PLC) automatically controls the
Pro-4-OGS. The program allows for the optimum time settings and
is set at the factory. Do not attempt to change the time settings
since this will affect the system performance and void the
performance specifications.
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6
PRINCIPLES OF OPERATION
The On Site Pro-4-OGS uses state-of-the-art technology to provide the end
user with a reliable source of oxygen. An overview of the operation of the
generator is given below.
The Pro-4-OGS is a two-bed adsorber system. The Pro-4-OGS consists of
two adsorber vessels filled with ZMS, a valve assembly, air filters, main
pressure regulator, and a product receiver tank. Dry, compressed air
(78%Nitrogen, 21%Oxygen, <1%argon) is passed through the air filters,
which remove particles, water and oil, and then through the air inlet
regulator which reduces the air to the final operating pressure 65psig/4.5bar
g. It is important to maintain the inlet air at the correct pressure; otherwise,
generator performance may deviate from design. Clean and dry air is
directed to one of the adsorber beds where nitrogen and water vapor is
adsorbed faster than oxygen in the pore structure of the ZMS, thus
increasing the oxygen purity of the product gas stream to USP 93% +/- 3%.
This product flows out of the top of the adsorber bed, through the pureflo
valve, and into the product receiver at a pressure slightly below the air
pressure.
A portion of the intermediate product produced is directed through the purge
orifice. This oxygen is allowed to flow back through the other adsorber
sieve bed and out through the exhaust line at atmospheric pressure. This
action purges the ZMS of nitrogen, and prepares the bed for the next cycle.
The pressure in the adsorber vessels is equalized and after about 60-90
seconds the next cycle starts. The beds switch roles; the first bed is purged
while the second bed produces oxygen product. The active bed will remain
on-line until just prior to becoming saturated with nitrogen. When the cycle is
completed, the controller will exhaust the saturated bed, and pressurize the
fresh adsorber bed. This allows a continuous flow of oxygen gas from the
unit for as long as the unit is in operation.
Nitrogen enriched waste gas is piped to the atmosphere through a silencer.
Dry oxygen product stream, with the specified maximum Oxygen content,
exits the adsorber vessels and is stored in a common product receiver tank.
Oxygen purity and flow rate can be checked before the oxygen is supplied to
the consumer.
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7 GENERATOR OPERATION
This section describes the procedure for starting, running, and stopping the
Pro-4-OGS. The operator should notify personnel in the area that the
generator will be started and make sure the startup will not interfere with
any other operations.
7.1
Startup
This section describes the necessary steps of both the initial startup and a
normal routine startup. If this is the first time the unit has been started,
follow the Initial Startup procedure.
Pro-4-OGS Generator
Panel
Main Disconnect
Compressor Motor
Starter
Feed Air Compressors/Air Tank
(Back of Skid)
Oxygen Tank
2P Booster Panel
Cylinder Rack
Pro 4 Oxygen Generation System (Pro-4-OGS)
7.1.1
Initial Startup
1. Verify that power supply is 230V/1ph/50Hz as labeled on the
Main Disconnect.
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2. Turn on the Main Disconnect located between the Pro-4-OGS
and the booster. The compressor will turn on with the main
power, and turn off when air tank pressure reaches its’ set point
around 115-130psi. Check that air tank pressure is in this
range. Open the air supply valve on the generator.
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 oxygen piping can severely reduce production
capacity!
3. Turn Pro-4-OGS Power switch to “ON”. Observe that the power
indicator light is on. If light is off, check fuse or light bulb.
4. Observe pressure gauges for one or more cycles. There should be
pressure at the “Peak Pressure” gauge.
5. Oxygen will start flowing to the product tank. Approx. time to fill
oxygen storage tank is 30 to 40 minutes
6. When Tank pressure reaches approximately 60psig the amber light
should go on and oxygen production will stop. When product is
used and Tank pressure falls about 8psi below the set point, the
amber light will go off and oxygen production will resume.
7. Open ball valve between oxygen storage tank and oxygen
regulator.
8. Set the oxygen product regulator pressure at 40psi.
NOTE
When the Pro-4-OGS 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.
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9. As the oxygen is used from the storage tank, its purity will continue
to increase to the specified level. The oxygen purity level can be
accelerated by bleeding the oxygen storage tank down to
approximately 20 psig. Let the storage tank pressure build up to
maximum pressure and bleed down again to 20 PSI. Repeat as
necessary.
10. The system is now ready to fill cylinders, proceed to Section 8.
7.1.2
Normal Startup
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. Turn Main Disconnect switch to “ON”.
2. Turn Pro-4-OGS Power switch to “ON”.
3. Open any shut off valves that have been closed.
4. Check gauge pressures as defined in Section 5.1.
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 to bring the product purity back to spec.
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 Disconnect to
OFF. This will stop all compressor, generator, and booster
functions immediately. Close the air-supply ball valve. Oxygen
supply can be shut off manually by closing the oxygen product ball
valve located on the product receiver tank.
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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 Pro-4-OGS Power switch and Main disconnect to
“OFF” position. There is no need to close air supply or oxygen
product ball valves.
7.2.3
Maintenance, Storage, or Shipping Shutdown
This procedure should be used when maintenance, storage, or
shipping are required.
1. Turn the Pro-4-OGS Power switch and Main disconnect to
“OFF” position. There is no need to close air supply or oxygen
product ball valves.
2. Relieve the Air Tank Pressure. Slowly open the lower drain
valve to bleed off the tank pressure, monitor pressure via the Air
Tank Pressure Gauge.
3. Relieve the Oxygen Tank Pressure. Slowly open the Oxygen
Tank Pressure Relief Valve located adjacent to the Oxygen
Tank Pressure Regulator, to bleed off the tank pressure,
monitor pressure via the Oxygen Tank Pressure Gauge.
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.
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8.0 Cylinder Filling
8.1 Cylinder Loading
1. To prepare for filling D or E cylinders, secure the High Pressure
Oxygen Cylinders to be filled in the D/E Cylinder Support Rack.
H cylinder may be filled by removing the D/E cylinder adapter.
2. There are two configurations for cylinder filling:
· For filling one cylinder, the center High Pressure Pigtail should
be used – the center valve controls it.
· For filling two cylinders, the two left and two right High Pressure
Pigtails are paired together.
The left pair is controlled by the left valve and the right pair by the
right valve. These pairs must be used together.
3. Select the High Pressure Cylinder Fittings to be used, and inspect
each one for any dirt, oil, or other foreign material. Clean with a
mild detergent as necessary and dry the fitting completely.
Remove any particles of cloth from the drying process. Ensure that
the gasket of the High Pressure Cylinder fitting is present and does
not appear damaged.
4. Open the High Pressure Cylinder Fitting by turning the handle
counterclockwise until opened enough to place over the valve of
the high-pressure cylinder, then put it in place.
5. Align the two index pins of the High Pressure Cylinder fitting with
the two holes in the high pressure cylinder valve and seat the pins
in the holes. If the pins do not line up, remove and reverse the
fitting. Secure the High Pressure Cylinder fitting to the highpressure oxygen cylinder valve by turning the handle on the fitting
clockwise until tight, while making sure that the index pins remain
seated.
6. Repeat process for each cylinder.
7. Open the high-pressure manifold valves for each High Pressure
Pigtail connected.
8. Make sure that high-pressure manifold valves where pigtails are not
connected are fully closed.
9. Open the valve on each high-pressure cylinder to be filled.
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10. Start the 2P Booster as defined by Section 8.2.
8.2 2P Booster Operation
2P Booster Panel
Manual Mode
1.
Turn the Manual/Automatic switch on the Control Panel to
‘HAND’ mode position. (The 2P Booster automatically stops
when the cylinders being filled reach approximately 2200
PSIG).
2.
Push the START button on the 2P Booster to begin flow of
oxygen to the cylinders.
3.
Monitor progress of cylinder filling on the High Pressure
Manifold Pressure Gauge.
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Auto Mode
1.
Turn the Manual/Automatic switch on the Control Panel to
‘AUTO’ position. (The 2P Booster automatically stops when
the cylinders being filled reach approximately 2200 PSIG).
2.
Push the 2P Booster Power Switch to the ON position.
3.
In “AUTO’ mode the 2P Booster will automatically begin flow
of oxygen to the cylinders.
4. Monitor progress of cylinder filling on the High Pressure
Manifold Pressure Gauge.
Note: The 2P booster will not start unless 30psi is available at input,
and the 2P Booster will stop if input pressure falls below 25psi.
8.3
Cylinder Removal
1. Turn 2P Booster OFF
2. Close the High Pressure Oxygen Cylinder Valves on all of the
connected cylinders.
3. Open flow back ball valve to relieve pressure from manifold.
4. Close the 3 High Pressure Manifold Needle Valves.
5. Slowly loosen the bottle connector to relieve the line pressure.
6. Repeat this process for each cylinder.
For further start up and operation of the booster see the 2P Booster
Manual.
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9.0 MAINTENANCE
On 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 in the maintenance manual, the
customer must also perform all maintenance recommended by the
manufacturers of the component items employed in the On Site Gas
Systems Generators. Note that where any component manufacturer
specifications are different from those of On Site Gas Systems, the more
demanding schedule should be adopted.
See the Pro-4-OGS Maintenance Manual for maintenance procedures.
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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 should
perform the troubleshooting best. If further assistance is required, contact
your local distributor or On Site Gas Systems Inc.
Reference the Pro-4-OGS Maintenance Manual for the complete list of
trouble shooting symptoms.
Symptom
Pro-4-OGS
not cycling
Probable Cause
Low voltage or
low amperage
Corrective Action______
Check electrical source
Circuit breaker
tripped
Reset circuit breaker
Main power is OFF
Turn main
power switch ON.
Low operator air
Increase air regulator
pressure
pressure
____________________________________________________________
Pro-4-OGS
O2 pressure switch
Reduce standby pressure
runs continuously;
set too high
amber light OFF
Cycle pressure too low
Increase air regulator
pressure
___________________________________________________________
Low product flow
air flowrate
Adjust air supply pressure
is too low
and flow
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Symptom
Probable Cause
Corrective Action______
Low product purity
Product flow too high
Decrease product flow
O2 analyzer malfunction
Check operation and
calibration
pressure too low
Increase operating
pressure or flow
Oil or water in unit
Contact On SIte
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*****CAUTION*****
DO NOT DISCONNECT OR
TURN OFF AIR TO GENERATOR
UNLESS GENERATOR POWER SWITCH
IS TURNED OFF
24