SeQual INTEGRA E-Z User manual

P/N 2917 Rev E - F
Dec 2011
Integra E-Z
Oxygen Concentrator
Service Manual

Service Manual
Integra E-Z Oxygen Concentrators
Chart SeQual Technologies Inc. Page 2 of 34 P/N 2917
TABLE OF CONTENTS
1. INTRODUCTION..........................................................................................................................................................3
1.1. Explanation of Terms..........................................................................................................................................3
1.2. Definitions............................................................................................................................................................3
1.3. Introduction to the ATF ......................................................................................................................................3
1.4. Basic Mechanical Layout....................................................................................................................................5
1.5. Theory of Operation ............................................................................................................................................5
2. SET-UP AND OPERATION.........................................................................................................................................8
2.1. The proper location..............................................................................................................................................8
2.2. Air intake filter.....................................................................................................................................................8
2.3. Control Panel Display..........................................................................................................................................8
2.4. Plug the unit in. ...................................................................................................................................................8
2.5. Starting the Integra E-Z......................................................................................................................................9
2.6. Service Mode......................................................................................................................................................10
3. MAINTENANCE ...........................................................................................................................................................9
3.1. Cleaning air intake filter ...................................................................................................................................11
3.2. Scheduled Preventive Maintenance..................................................................................................................12
4. TEST PROCEDURES ................................................................................................................................................. 13
4.1. Unit Test Procedure - Preferred Method ..........................................................................................................13
4.2. Unit Test Procedure-Alternate Method.............................................................................................................14
4.3. Alarm Verification Test.....................................................................................................................................14
5. TROUBLESHOOTING............................................................................................................................................... 15
5.1. Alarm Conditions............................................................................................................................................... 15
5.2. Unit fails to start ................................................................................................................................................ 17
5.3. Unit tries to start but shuts down alarming....................................................................................................... 17
5.4. Unit does not produce adequate oxygen flow. ..................................................................................................18
5.5. Unit starts but shuts down after a short period of operation............................................................................18
5.6 Compressor pressure relief valve actuates........................................................................................................18
5.7 Compressor Noisy..............................................................................................................................................19
5.8 Trouble Shooting Guide for Integra E-Z units................................................................................................. 20
6. REPAIR PROCEDURES ............................................................................................................................................23
6.1 Removal and installation of covers ...................................................................................................................23
6.2 Removal and installation of the POD Assembly...............................................................................................23
6.3 Printed Circuit Board Assembly (PCBA) Replacement Procedure.................................................................. 24
6.4 Removal and installation of the ATF module................................................................................................... 26
6.5 Removal and installation of the Compressor Assembly....................................................................................27
6.6 Compressor Top-End rebuild............................................................................................................................ 29
7. INTEGRA E-Z 5L SPECIFICATIONS ..................................................................................................................... 31
8. INTEGRA E-Z 7L SPECIFICATIONS ..................................................................................................................... 32
9. INTEGRA E-Z 10L SPECIFICATIONS ................................................................................................................... 33
10. PART NUMBERS.................................................................................................................................................... 34
10.1. Preventive Maintenance Parts...........................................................................................................................34
10.2. Recommended Spare Parts Inventory...............................................................................................................34
11. SEQUAL ADDRESS AND WEBSITE INFORMATION.....................................................................................35

Service Manual
Integra E-Z Oxygen Concentrators
Chart SeQual Technologies Inc. Page 3 of 34 P/N 2917
1. Introduction
SeQual = Chart SeQual Technologies Inc.
1.1. Explanation of Terms
WARNING:
Indicates the possibility of injury to the patient,
operator, or technician if accompanying procedures
or explanations are not adhered to.
CAUTION:
Indicates the possibility of damage to the device or
equipment if procedures are not followed.
NOTE:
Places emphasis on an operating characteristic or
important consideration.
1.2. Definitions
ATF®(Advanced Technology Fractionator) – The term used to describe the oxygen
concentrating module used in SeQual products.
ESD (Electro-Static Discharge) – The effect of small static electrical charges on printed
circuit boards and components.
LPM (Liters Per Minute) – typically referring to oxygen flow rate
OM (Oxygen Monitor) - Integra concentrators can be ordered with an integrated oxygen
monitor. When specified, a procedure may apply only to OM equipped units.
POD Assembly – Subassembly consisting of the front panel and user interface components
including the printed circuit board and oxygen-monitoring device.
Product/Product flow – Refers to the oxygen being produced.
Rated Flow - The flow rate for which that model of Integra was designed to operate as a
maximum continuous rate. The rated flow of an Integra E-Z 5 is five liters per minute. The
rated flow of an Integra E-Z 7 is seven liters per minute and Integra E-Z 10 is ten liters/minute.
Upgraded – It is the policy of SeQual Technologies to incorporate certain design
improvements into machines, which have been returned to the factory for inspection and/or
repair. References in this manual to serial numbers indicates that the particular feature or
function has been incorporated beginning with that serial number, and is being incorporated on
upgraded machines.
1.3. Introduction to the ATF
The SeQual Advanced Technology Fractionator (ATF®) module eliminates many of the parts found in
conventional pressure swing adsorption oxygen concentrators. It has been designed and constructed to
provide years of trouble free service. A quick inspection will reveal the absence of the product tank,
pressure regulator, and solenoid manifold found in conventional two-bed concentrators. The functions
of these devices are replaced by a single rotating valve, which ports gas movement within the ATF
module.

Service Manual
Integra E-Z Oxygen Concentrators
Chart SeQual Technologies Inc. Page 4 of 34 P/N 2917
The ATF module utilizes twelve sieve beds and a patented rotary valve to produce a constant flow of
oxygen. A small electric motor and reduction gear mounted on the ATF module turns the valve. As the
valve rotates, compressed air is channeled to the beds, resulting in four of the beds producing oxygen,
four beds are static, and four beds are purging. The oxygen is collected in the product head and is then
routed through the pod assembly for patient use. Purge gasses are expelled through two integral
mufflers in the ATF base, characterized by a soft, rhythmic “breathing” noise, which can be heard
when operating the unit with the covers removed.
CAUTION:
There are no field serviceable components in the ATF assembly.
Any attempt to open the module, without the express written
consent of SeQual Technologies, will result in module
contamination and will void the warranty.
The ATF product flow/pressure is self-regulating by matching compressor size (pressure and volume
of flow) to the rated flow of a particular ATF module. Fixed orifices within the module regulate
oxygen used as sieve bed purge gas. No adjustments of any type are required in the field. Full
concentration is usually achieved within three (3) to ten (10) minutes of turning the unit on, therefore a
10-minute warm up period is recommended prior to conducting concentration tests for diagnostic
purposes..
Gas balance is maintained by controlling the flow rate on the POD assembly to operate the unit within
its design range. If the product flow is set beyond this design range, there will be insufficient oxygen
available to completely purge the beds and concentration will drop. Conversely, if there is extremely
low flow (less than 0.5 LPM) more oxygen is purging and a build-up of inert argon gas will occur,
which will reduce overall concentration readings.
As with any mechanical device, certain precautions must be observed in order to maintain the unit
properly. By familiarizing themselves with several basic principles of ATF operation, technicians will
be able to rapidly diagnose problems, effect repairs and return the concentrator to service.
Always apply voltage to the gear motor assembly prior to introducing airflow to the ATF. Check that
the shaft visible on the top of the gearbox is rotating. Some grease run-out in this area is typical,
especially in units that have had long, continuous service. Wipe the area and mark the drive shaft with
a marker to assist in detecting rotation. Minor gear mesh noise is acceptable, but any inconsistent,
jerky, or intermittent motion is not normal. Rotation should be smooth.
Always cap or plug the ATF oxygen outlet and air inlet ports when it is not installed or when the hoses
are removed. Even short duration exposure to moisture-laden air can have an adverse effect on ATF
performance.
Never operate an ATF beyond its rated flow capacity. Ensure that the Integra flow selector knob or an
external flow meter properly limits the product flow rate. An ATF designed to deliver 5 liters per
minute (LPM) of flow will rapidly suffer performance loss if operated at 6 LPM. Within a short period
of time, this performance loss can become permanent.
Never apply compressed air flow to an ATF with a damaged, missing, or malfunctioning gear motor
assembly. Even a few minutes of flow without valve rotation can severely and permanently damage the
module.

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Integra E-Z Oxygen Concentrators
Chart SeQual Technologies Inc. Page 5 of 34 P/N 2917
1.4. Basic Mechanical Layout
The Integra E-Z family of oxygen concentrators shares the same basic components and layout,
consisting of the compressor, ATF module, and POD assembly. These components are mounted to the
base and center frame and are housed in a two-piece cover. Although the plastic components are
common to all the Integra E-Z concentrators, refer to the appropriate model data sections concerning
parts replacement.
The Integra E-Z Oxygen Concentrator is manufactured in the following variations:
DESCRIPTION 115V / 60 Hz 220-240V / 50Hz
INTEGRA E-Z 5 LPM 6323A EURO
INTEGRA E-Z 5 LPM OM 6323A-OM EURO
INTEGRA E-Z 7 LPM 6323A-7
INTEGRA E-Z 7 LPM OM 6323A-OM-7
INTEGRA E-Z 10 LPM 6323A-10 6323A-10 EURO
INTEGRA E-Z 10 LPM OM 6323A-OM-10 6323A-OM-10 EURO
User Controls are located on the front panel of the POD assembly. On/Off button, “Plus”(+) and
“Minus”(-) flow rate control buttons, Service button (located behind the No Smoking logo), and the
Flow Indicator LCD display.
1.5. Theory of Operation
1.5.1 Air/Product flow
Ambient air is pulled in through the cabinet inlet filter. A cooling fan in the base expels hot air
through an opening in the bottom of the case. The compressor inlet filter and muffler assembly,
mounted on the center frame above the compressor, provides sound suppression and filtered air
to the compressor via a clear feed tube. Compressed air from the compressor runs through a
heat exchanger coil and into the inlet barb of the ATF module. Oxygen from the product barb is
routed to the pod assembly.
The POD assembly provides electrical power, oxygen flow control, flow rate indication, and
various monitoring functions depending on model. The oxygen outlet port is equipped with a
DISS fitting for connection of appropriate accessories such as a humidifier, cannula, etc.
1.5.2 Electrical
A two-prong plug can be inserted into any standard outlet of the appropriate voltage. All
Integra E-Z concentrators are double insulated and require no grounding.
WARNING
Do not modify or otherwise tamper with the electrical harness or attached
components without the express, written consent of SeQual Technologies. Doing so
could result in the loss of double insulation protection and create a potential hazard.
Line voltage is connected to a printed circuit board mounted in the POD assembly.
Transformers on the board reduce line voltage to low voltage for circuit board control, flow

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Chart SeQual Technologies Inc. Page 6 of 34 P/N 2917
control and monitoring functions. Circuit traces route power to the cooling fan, ATF gear
motor, and compressor.
WARNING
Line voltage is present at the circuit board at all times when
the unit is plugged into a wall outlet. Unplug the concentrator
prior to performing maintenance or repairs in this area.
CAUTION:
Do not touch or attempt removal of the circuit board without
ensuring that all Electro-Static Discharge (ESD) procedures
and controls are in place. Damage to components on the printed
circuit board can result in a failure in performance of the device.
The push button On/Off switch is of the momentary contact, which is read by microcontroller
on the main board and turns on the power to activate cooling fan, ATF gear motor and
compressor.. . A Pure Sine wave electrical signal for Mains power is required to operate the
Integra only. Subsequently, a Modified Sine Wave for Mains power is not recommended.
A power management feature has been incorporated to improve protection to the user in the
event of a momentary power failure. In the event of a power interruption, the unit will alarm as
normal for a power loss. A 9V battery provides back-up power for alarm circuit. The unit will
resume operating twenty seconds after the initial interruption, unless it has been turned off
during the power interruption.
Integra E-Z family of oxygen concentrators incorporates a closed-loop feedback flow control
valve, eliminating the need for the user to adjust or tweak the flow on the unit more than the
initial setting. This is accomplished by the integration of a flow and concentration
measurement system (OM models only) in a new control system. From the patient point of
view, the system will operate in a “set and forget” mode where a desired flow rate is set (using
up/down arrows and a display to indicate the target flow rate) and the system automatically
adjusts the internal flow control valve to provide that flow to the patient, regardless of what
accessories are attached to the oxygen concentrator.
The OM models also incorporate circuitry on the printed circuit board which are used in
conjunction with the ultrasonic measurement flow tube and uses the timing of the speed of
sound in the gas mixture to calculate the percentage of oxygen present in the gas stream. A
timing circuit on the board prevents the low oxygen alarm from sounding during the warm-up
cycle (a maximum of 10 minutes).
The Integra E-Z oxygen concentrator does not utilize a conventional circuit breaker. A separate
“current-sense” transformer mounted on the printed circuit board continuously monitors the
current being drawn by the compressor. This sensing feature will turn off the concentrator to
prevent excessive current draw in the event of a component failure or other abnormal high
demand condition. There is nothing to reset. Once the unit detects the abnormal power
condition it will shut-down and alarm. The user will only need to turn off the unit and turn it
back on and assuming the power has returned to normal and there is no additional fault it will

Service Manual
Integra E-Z Oxygen Concentrators
Chart SeQual Technologies Inc. Page 7 of 34 P/N 2917
start running. In addition the Integra E-Z has two fuses. The primary fuse F2 (service
technician replaceable fuse, see Section 10 for spare parts) is used as a back-up to the current-
sensing system and will prevent excessive current draw by the compressor. Another non-
replaceable fuse, F1, provides protection in the event of a transformer failure.
A thermal cut off switch, located in the bottom of the base in front of the compressor, acts as a
thermal circuit interrupt. In the event that the internal cabinet temperature rises above
approximately 140 degrees Fahrenheit (60 degrees C), the switch will open, this will be
detected by the current sense feature and shut the unit off and alarm. The switch will
automatically reset when the cabinet temperature returns to normal operating range. On the
Integra E-Z models once the thermal switch closes again the unit will not automatically turn
back ON after temperature returns to normal. It will require user to address the cause of
overheating (unit covered by blanket or similar issue) and then press the On/Off button to
continue us of the oxygen concentrator.

Service Manual
Integra E-Z Oxygen Concentrators
Chart SeQual Technologies Inc. Page 8 of 34 P/N 2917
2. Set-up and Operation
2.1. The proper location.
Locate the concentrator in a well-ventilated space that provides adequate airflow. Ensure that
furniture, draperies or clothing will not impede air circulation. The Integra requires 6 air
exchanges per hour to properly ventilate. Avoid placing the unit over a floor heat register or
against a baseboard heating system.
2.2. Air intake filter.
The air intake filter should be inspected and cleaned Weekly. It should be clean and free of
debris. Refer to Routine Maintenance Section.
2.3. Control Panel Display
The Control Panel and buttons is shown in the figure below.
2.4. Plug the unit in.
The backlight on the Flow Indicator LCD display will turn ON indicating the unit is energized
and ready for use.
WARNING:
Do Not connect to an extension cord or electrical outlet controlled by a switch. No other appliance
should be plugged into the wall outlet. Voltage requirements are marked on the label on back of unit.
Green Light
On/Off Button
Red Light
Yellow Light
Increase Flow Button
Decrease Flow Button
LCD Flow Indicator
(LPM)
Service Switch
(Hidden Button for
Provider Use Only)

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Integra E-Z Oxygen Concentrators
Chart SeQual Technologies Inc. Page 9 of 34 P/N 2917
Flow Rate
Shown?
Green
Light
Yellow
Light
Red
Light
Audible
Alarm
Unit
State
Operating Condition
No Off Off Off Off
Not
Energized
Unit not running / Flow
Indicator Display Not Lit
No Off Off Off Off Energized Unit not running / Flow
Indicator Display Lit
2.5. Starting the Integra E-Z
2.5.1. Push the On/Off button and verify the unit Start-Up Sequence
Allow the unit to warm-up and stabilize (approximately 2 minutes but allow up to 10 minutes).
Adjust the flow using "+" and "−"buttons. A shorter warm-up will occur at lower flow rates.
NOTE:
The Integra E-Z flow indicator sets the target flow rate desired by the patient. The
installation of humidifiers or other devices can cause a back pressure on the unit
therefore it is recommend that the flow rate be set prior to attaching accessories to
the concentrator. After an initial startup or after a power interruption the unit may
automatically reduce the flow rate briefly before returning to the set flow rate.
2.5.2. Start-up Sequence OM units
On initial start-up Integra E-Z units light the Green, Yellow and Red LED’s with a 3 second
beep followed by an intermittent beep for the remainder of the warm-up. As concentration
increases to ~70%, the Red LED turns off and the Yellow and Green remain on. When the
concentration reaches normal operating range (above 85%), the Yellow LED will turn off as
well as the intermittent beep. The Green LED will stay lit indicating normal operation.
2.5.3. Start-up Sequence Non-OM units
On Non-OM start-up Integra E-Z units will light the Green, Yellow and Red LED’s with a 3
second beep indicating all alarms indicators are functioning followed by the green LED turning
on. The table below shows operating conditions for Integra E-Z Oxygen Concentrators:
Flow Rate
Shown? Green
Light Yellow Light Red Light Audible
Alarm Unit State Operating Condition
Yes On On On On for 3
seconds Started
Running Unit is Starting
Yes On On On Periodic
Beep Running Unit is warming up*
Yes On On Off Periodic
Beep Running
Yes On Off Off Off Running Normal Operating
Condition
Yes Off On Off Periodic
Beep Not
Running Unit turned On/Off/On Quickly
* These conditions are displayed only on units equipped with oxygen monitor.

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Chart SeQual Technologies Inc. Page 10 of 34 P/N 2917
2.5.4. Attach required tubing, humidifier and additional accessories as prescribed.
CAUTION:
Use of downstream or external flow control device is not recommended.
The Integra E-Z will attempt to control the flow rate to the target flow
set on the indicator. If the unit cannot control to this flow rate an alarm
indication will occur and potential damage may occur to the unit.
CAUTION:
Use of certain administration accessories not specified for use with
this oxygen concentrator may impair the performance.
2.6. Service Mode:
To Enter Service Mode press the Hidden Switch (located behind the top No-Smoking symbol)
and either the “+” or “-“ button for a minimum of 2 seconds. To Exit Service Mode press the
Hidden Switch and either the “+” or “-“ button again or it will exit by itself after 10 seconds.
2.6.1. Checking Hourmeter (provider use only)
After entering Service Mode use the “+” or “-“ buttons to scroll through the
options until the hourmeter reading is displayed HXXXXX.X
2.6.2. Checking Battery Level (provider use only)
After entering Service Mode use the “+” or “-“ buttons to scroll through the
options until the software revision displayed. 5 Solid Bars = Full Battery and
0 Solid Bars = Depleted Battery. Recommended battery replacement at 2
Solid Bars (See Maintenance Section).
2.6.3. Enable or Disable Battery Level Alarm (provider use only)
After entering Service Mode use the “+” or “-“ buttons to scroll through the
options until the battery symbol is displayed. If the battery alarm is disabled
you will see a “D”, this is how the unit is shipped from the factory. If the
battery alarm is enabled you will see an “E”. To change the alarm status
press only the Hidden Switch while in Service Mode. The Battery Alarm
will be triggered at 2 Solid Bars.
2.6.4. Checking Software Revision (provider use only)
After entering Service Mode use the “+” or “-“ buttons to scroll through the
options until the software revision displayed SW=X.XX