Nidek Mark 5 Nuvo Lite Service manual (2013)

Nidek Medical Products, Inc®

Mark 5 Nuvo® Lite Oxygen Concentrator

Service Manual for Serial Numbers beginning 013-XXX

Nidek Medical Products, Inc.

3949 Valley East Industrial Drive Birmingham, Alabama 35217 USA

Telephone: [phone] • 24-Hour Fax: [phone]

Nidek Medical is a trademark of Nidek Medical Products, Inc.

Mark 5 Nuvo® Lite is a registered trademark of Nidek Medical Products, Inc

Table of Contents

General Safety Instructions

Production and Use of Oxygen
Use and Maintenance of the Device
Standards and Regulations

Section 1.0 Introduction

1.1

1.2

1.3

Home Service Provider Responsibility
Important Notice and Symbol Explanations
Functional Specifications

Section 2.0 Operational Check and Concentration Test

2.1

2.2

2.3

2.4

Description of Operation
Operation Check
Alarm System

2.3.1 Power Failure Alarm test
Oxygen Concentration Test and Specification
No Oxygen Flow Alarm test Procedure

2.5

Section 3.0 Patient Instructions

3.1

3.2

General Instructions
Routine Maintenance by the Patient

3.2.1 Cleaning the Cabinet Air Filter

3.2.2 Checking the Power Alarm System

Section 4.0 Home Service Provider Maintenance

4.1

Routine Maintenance

4.1.1 Cabinet Air Filter

4.1.2 Final Product Filter Replacement

4.1.3 Compressor Inlet Air Filter Replacement

4.1.4 Recording Maintenance

2

5
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5

6
7
8

9

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10
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11

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11
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12

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Section 5.0 Service

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4.2

5.1

5.2

5.3

5.4

5.5

Cleaning Unit

4.2.1 Preparing for New Patient Use

Components
Cabinet Removal

5.2.1 Removing Cabinet Back

5.2.2 Caster Replacement

Compressor

5.3.1 Compressor Replacement

5.3.2 Capacitor Replacement

Process Control Valve
Sieve Bed Replacement

5.5.1 Sieve Bed Removal

5.5.2 Sieve Bed Installation

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13

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14
14
14

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15
16

16
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17

5.6

Cabinet Fan Replacement

17

5.7

5.8

5.9

5.10

5.11

5.12

5.13

5.14

5.15

Section 6.0 Troubleshooting

6.1

6.2

6.3

6.4

6.5

Exploded Drawings / Parts

A-1:
A-2:
A-3
A-4
A-5
A-6:
A-6-A:
A-7:
A-7-A:
A-8:
A-8-A:
A-9:
A-9-A:
A-10:

Circuit Board Replacement

5.7.1 Alarm Circuit Board Removal

5.7.2 Timing Circuit Board Removal
Product Regulator Check and Setting

5.8.1 Product Regulator Cleaning or Rebuilding
Pressure Monitoring Board Replacement
Circuit Breaker Replacement

5.10.1 Circuit Breaker Removal

5.10.2 Circuit Breaker Installation
I/0 (ON/OFF) Power Switch Replacement

5.11.1 I/0 (ON/OFF) Power Switch Removal

5.11.2 I/0 (ON/OFF) Power Switch Installation
Buzzer Replacement
Hour Meter Replacement
Flow Valve Replacement

5.14.1 Flow Valve Removal

5.14.2 Flow Valve Installation
Power Cord Replacement

Air Pressure Test (P1)

6.1.1 High Air Pressure (P1)

6.1.2 Low Air Pressure (P1)
Product Pressure Test (P2)

6.2.1 Low Product Pressure

6.2.2 High Product Pressure
General Troubleshooting
Troubleshooting Chart
Tool Kit, Oxygen Purity Testing and Pressure Test

Gauge

18
18
18
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20
20
20
20
20
20
20
20
20

21
23
23
23
24
24
25
26
28

Flow Schematic – OCSI Option 29
Flow Schematic – Standard Option 29
Flow Schematic – No Flow Alarm 30
115 / 230 Volt Electrical Schematic 31
Electrical Schematic – No Flow Alarm 33
Compressor Assembly 34
Parts, Compressor Assembly 35
Front Cabinet Assembly 36
Parts, Front Cabinet Assembly 37
Back Cabinet Assembly 38
Parts, Back Cabinet Assembly 39
Module Assembly 40
Parts, Module Assembly 41
Service and Maintenance Log 42

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 General Safety Instructions

Production and use of oxygen

Oxygen is not a flammable gas, but accelerates the combustion of materials. To prevent fire risks, the
MARK 5 NUVO Lite should be kept away from flames, incandescent sources or sources of heat
(including cigarettes) and combustible products such as oil, grease, solvents, aerosols, etc.

Do not use in an explosive atmosphere.

Prevent oxygen from accumulating on upholstered seats or any other fabric. If the concentrator
operates without being administered to a patient, locate it so that the flow of product gas produced is
dissipated into the air.

Locate the equipment in a free space (filter to the rear and below) which is well ventilated and free of
fumes or atmospheric pollution.

Use and Maintenance of the Device

Use the electric cable provided and check that the voltage of the mains socket used complies with the
electrical characteristics of the appliance indicated on the manufacturer's plate on the rear of the
device.

Do not use an extension cord or multiple sockets which can create sparks and therefore pose a fire
risk.

Use of the MARK 5 NUVO Lite must be restricted solely to medically prescribed oxygen therapy in
compliance with the prescribed rate and duration.
Use in other circumstances may represent a hazard to patient health.

Do not use in a specifically magnetic environment (MRI, etc.).

The MARK 5 NUVO Lite has an audible alarm intended to warn the user of any problems. The user
must determine the maximum distance away from the Nuvo Lite based on the on the sound levels in
the environment, to ensure that the alarm is always audible.

Standards & Regulations

In compliance with UL60601-1 [EN60601-1] (para 6.82.b):

"The manufacturer, assembler, installer or distributor are not considered to be responsible themselves
for the consequences on the safety, reliability and characteristics of a device unless the:

• Assembly, fitting, extensions, adjustments, modications or repairs have been performed by persons
authorized by the party in question.

• Electrical installation of the corresponding premises complies with local electrical codes. (e.g. IEC /
NEC).

• Device is used in accordance with the instructions for use.
If the replacement parts used for the periodic servicing by an approved technician do not comply with

the manufacturer’s specications, the manufacturer is not responsible in the event of an accident.

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Do not open the equipment when it is powered on: risk of electrocution.

This device complies with the requirements of the FDA Quality System Regulation and EU Directive
93/42/EEC, but its operation may be affected by use in the surrounding area of appliances such as
diathermy, high frequency electro-surgical instruments, defibrillators, short wave treatment appliances,
cell-phones, CB devices and other portables, microwave ovens, induction hot plates or remote control
toys, and more generally, by electromagnetic interference exceeding the levels specified in standard
IEC(EN) 60601-1-2:2001.

As a regulated medical device, both manufacturers and service providers have certain responsibilities
regarding complaints.

FDA defines a complaint as any written, electronic or oral communication that alleges
deficiencies related to the identity, quality, durability, reliability, safety, effectiveness or
performance of a device that has been released for distribution.

Service providers have a responsibility to evaluate any complaints received from their direct

customers. ( Ref. CFR 820.198 ). Nidek Medical does not have direct links to your customers.

Your evaluation should include the following:

 Determine if the complaint warrants action by Nidek Medical,

 If NO, resolve the complaint with your customer,

 If YES, contact Nidek Medical customer service,

 Work with Nidek Medical to resolve all complaints.

1.0 Introduction

1.1 Home Service Provider Responsibility

All Home Service Providers of the Nidek Medical MARK 5 NUVO Lite Oxygen Concentrator must
assume responsibilities for handling, operational testing, patient instruction, and maintenance. These
responsibilities are outlined below and throughout this manual.

 WARNING

MARK 5 NUVO Lite units must not be used for or with any life-supporting or life sustaining
applications. Patients unable to communicate discomfort while using this device may require additional
monitoring. Advise patients to immediately notify their Home Service Provider(s) and/or physician(s) in
case of an alarm or any discomfort.

As a Home Service Provider, you must do all of the following:

 Inspect the condition of each MARK 5 NUVO Lite unit immediately upon delivery to your

business location. Note any sign of damage, external or internal, on the delivery receipt,
and immediately report it directly to both the freight company and Nidek Medical Products,
Inc.



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 Check the operation of each MARK 5 NUVO Lite before delivery to a patient. Always

operate the unit for a reasonable length of time and check that the oxygen concentration
level is within specifications as referred to in Section 2.4. Test the power failure alarm as
described in Section 2.3 of this manual.

 Deliver MARK 5 NUVO Lite units only to patients authorized by a physician’s prescription.

The MARK 5 NUVO Lite must not be used as a life-supporting or life sustaining device. A
backup supply of oxygen must be available.

 Instruct patients and patient caregivers how to use the MARK 5 NUVO Lite in conjunction

with the Users Manual.

 Instruct patients and patient caregivers to notify their physicians and/or Home Service

Providers if they experience any signs of discomfort.

 Instruct each patient and patient caregivers how to perform routine maintenance of the

cabinet air filter and how to check the alarm system. (Refer to Section 3.2.)
Be available to service each patient at any time. Maintain the MARK 5 NUVO Lite in
accordance with Section 4.0.

Repair components and replace parts only as outlined in this manual. Use only Nidek Medical parts for
replacement in MARK 5 NUVO Lite Oxygen Concentrators.

 Refer to the MARK 5 NUVO Lite Product Warranty if parts replacement is required within

the warranty period.

1.2 Important Notice and Symbol Explanations

As you read the manual, pay special attention to the WARNING, CAUTION, and NOTE messages.
They identify safety guidelines or other important information as follows:

WARNING: Describes a hazard or unsafe practice that can result in severe bodily

injury or death.

CAUTION: Describes a hazard or unsafe practice that can result in minor bodily

injury or property damage.NOTE:Provides information important
enough to emphasize or repeat.

NOTE Provides information important enough to emphasize or repeat.

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The following harmonized symbols (pictograms) are located in the User’s Guide of the MARK 5 NUVO
Lite unit:

Read the accompanying documents; particularly the User's Guide

Store, ship and use the device in an upright condition

No smoking within 2 meters (six feet) of this device, oxygen-carrying

tubing, or accessories.

Indicates an alarm signal for low oxygen concentration or other problem

Do not use any oil or grease on or near the device

1.3 Functional Specifications

Dimensions: 35.6 cm long, 22.9 cm wide, 58.5 cm high

(14 in. long, 9 in. wide, 23 in. tall)

Weight: 14.5 kg [32 Ib] varies with sound attenuation package
Electrical 115 VAC, 60 Hz, +/- 10% <330 watts(avg)
Requirements: 230 VAC, 50 Hz, +/- 10% <300 watts(avg)

230 VAC, 60 Hz, +/- 10% <330 watts(avg) (280 W for 3 l/min unit)
Capacity: Max. 5 liters per minute ( 3 l/min for 925/60K )
Accuracy: Flow Valve ±10% indicated flow rate or +/- 200 ml whichever is greater as

per ISO 8359 Standard

Concentration: 2 liters per minute at >90%

5 liters per minute at 90% (+ 6.5 / - 3%)

(Based on 21°C [70°F] at sea level)

Response Time: Acceptable concentration is normally achieved in about 90 seconds; allow

5 minutes to attain full concentration.

Positioning: Operate the unit in an upright position, maintaining at

least 15 cm (six inches) of open space on all sides for ventilation.

.

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2.0 Operational Check and Concentration Test

2.1 Description of Operation

Air enters the MARK 5 NUVO Lite Oxygen Concentrator through an external cabinet air filter. This
filtered air enters the compressor via a suction tube and fine filter, which quiets the suction sounds
made by the compressor. Pressurized air then exits the compressor and passes through a heat
exchanger into a pair of 3-way solenoid valves. The heat exchanger reduces the temperature of the
compressed air. Next, the solenoid valve directs the air into one of two sieve beds that contain
molecular sieve. The special characteristic property of molecular sieve is that it physically attracts
(adsorbs) nitrogen when air passes through this material, thus enabling the production of high purity
oxygen.

There are two sieve beds or adsorbent columns; while one produces high purity oxygen, the other is
purged of the nitrogen it adsorbed (collected) while it was producing oxygen. Each column produces
oxygen for approximately five seconds and delivers it to the product storage volume tank integrated
into the sieve module. Oxygen exits the product storage tank through a pressure regulator, flow control
valve, and final product filter. The flow control valve, controls the flow rate of oxygen delivered to the
patient. The MARK 5 NUVO Lite unit delivers up to 95% oxygen concentration at flow rates from

0.125 to 5 l/min. The remaining constituents of the product gas stream are nitrogen and argon, both
of which are part of the air we breathe, are inert and are completely safe.

2.2 Operational Check

Nidek Medical runs each device through a burn in period and tests every MARK 5 NUVO Lite Oxygen
Concentrator thoroughly after manufacture before releasing it for shipment. As the Home Service
Provider, it is your responsibility to perform the following test to ensure that no damage occurred in
shipping or handling.

1. Open and inspect all concentrator cartons upon receipt. Unpack each unit and remove it from
its carton. Inspect the unit itself for damage. If the exterior of the carton is damaged, or the
unit itself is damaged, note it on the freight bill signed by the driver.

2. Plug in the power cord of the unit, and set the I/0 (ON/OFF) switch to the I (ON) position.
Check to see that the following occurs:

3. The compressor runs, listen for the sound.

4. Exhausted cooling air flows out of the bottom rear of the unit.

5. OPTIONAL for Units Equipped with Oxygen Concentration Status Indicator (OCSI): The OCSI
green light remains off until the oxygen concentration reaches 85% ± 3% (82% ± 2% for 50 Hz
units) (approximately two minutes).

6. OPTIONAL for Units Equipped with No Oxygen Flow Alarm Board: The No Oxygen Flow board
test should be preformed as in Section 2.5 of this manual.

7. After performing the above steps, remove the power cord from the wall outlet. Actuate the I/0
(ON/OFF) switch to the I (ON) position and note that the audible alarm sounds intermittently.
(See Section 2.3). If the unit does not initially sound off, plug the unit in and allow the unit to
run approximately 10 minutes to charge the capacitor and repeat the test. Move the switch to
the 0 (OFF) position.

8. Turn the flow valve adjustment knob clockwise until it stops (wide open). The flow valve should
indicate 5 liters/min. and the output of the unit should be 5 liters/min. If not, refer to Section

5.8 to adjust the product regulator.

9 Perform an oxygen concentration test, as described in Section 2.4.

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2.3 Alarm System

The MARK 5 NUVO© Lite Oxygen Concentrator is equipped with a capacitor powered alarm system,
which sounds an intermittent alarm when a power failure occurs and a continuous alarm when one or
more cycle variables are not within specification. It sounds an alarm if the high or low pressure
indicators are activated or if the optional OCSI detects lower than predetermined levels of oxygen
concentration. The alarm remains on until you correct the alarm condition or you set the I/0 (ON/OFF)
switch to the 0 (OFF) position. Refer to Section 6.0 for a list of probable alarm causes.

2.3.1 Power Failure Alarm Test

To test the power failure alarm, perform the following actions:

1. Unplug the power cord from the wall outlet, and set the I/0 (ON/OFF) switch to the I (ON)
position.

2. If the unit has been stored for a prolonged period, Allow unit to run for approximately 10
minutes to charge the capacitor and re-test the unit.

3. This should immediately activate the intermittent audible alarm. If it does not, refer to the
troubleshooting chart in Section 6.0 of this manual.

2.4 Oxygen Concentration Test and Specification

To ensure that the output of oxygen from the device is within specification, you must perform an
oxygen concentration test. Test the unit upon delivery to a patient and at periodic intervals. Home
Service Providers, based on their expertise and documentation, may establish and implement their own
plans for checking oxygen concentration. Consult Nidek Medical’s Service and Maintenance Log (A-

11) for the recommended maximum intervals for testing.

1. If an oxygen humidifier bottle is used, remove it from the oxygen outlet.

2. Connect a calibrated oxygen concentration analyzer to the oxygen outlet.

3. Set the I/0 (ON/OFF) power switch to the I (ON) position. (It takes approximately five minutes

for the oxygen concentration to stabilize.) Take oxygen concentration readings over a period of
several minutes to reduce any cyclic variations

4. Verify that the product flow rate delivered by the unit matches the patient’s prescription and

does not exceed the capacity of the unit.

5. Disconnect the oxygen analyzer, and reconnect the humidifier bottle (if used) and any other

equipment / accessories that may be required.

6. Adjust the flow valve adjustment knob to the prescribed flow rate.

Nidek Medical MARK 5 NUVO Lite Concentration Specifications

Liter Flow Specification

2 l/min greater than 90%
5 l/min 90% + 6.5 / - 3%

 NOTE:

Do not measure oxygen concentration output after the product stream passes through a humidifier
bottle. Erroneous readings will result and your oxygen concentration measuring device might be
damaged.

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2.5 No Oxygen Flow Alarm Test Procedure

A No Oxygen Flow Alarm board is available as an option with the Nuvo Lite
Oxygen Concentrator. To test the function of “No Flow” alarm if so equipped, follow the instructions
below:

1. Turn Concentrator on and allow the unit to reach normal operating purity.

2. Adjust the Oxygen Flow to desired flow rate.

3. Block the oxygen flow at the patient outlet

4. A continuous audible alarm should sound as long as the Oxygen flow is blocked

3.0 Patient Instructions

3.1 General Instructions

It is important that patients thoroughly understand how to operate the Nidek Medical MARK 5 NUVO
Lite unit. This enables proper treatment as prescribed by a qualified, licensed physician. You must

explain that the purpose of this therapy is to alleviate symptoms. If patients experience any discomfort
or the unit alarm sounds, they must notify their Home Service Provider and/or physician immediately.
You, as the Home Service Provider, are responsible to see that each patient receives the User's Guide.
Explain each step in the operation of the unit to the patient in reference to that guide.

3.2 Routine Maintenance by the Patient

To ensure accurate output and efficient operation of the unit, the patient must perform two simple
routine maintenance tasks:

• Clean the cabinet air filter

• Check the alarm system

3.2.1 Cleaning the Cabinet Air Filter

● NOTE: The patient must clean this filter weekly, as described below. The filter may

require more frequent cleaning if the MARK 5 NUVO Lite unit operates in a harsh environment such
as a house heated by wood, kerosene, or oil, or one with excessive cigarette smoke.

1. Remove the dirty cabinet air filter from the back of the MARK 5 NUVO Lite unit,.

2. Wash the dirty filter in warm water with household detergent, and rinse.

3. Use a soft absorbent towel to remove excess water.

4. Reinstall the clean cabinet air filter on the grille in the back of the unit. Be careful that the filter
edges are under the tabs.

3.2.2 Checking the Power Alarm System

See Procedure described in Paragraph 2.3.1

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4.0 Home Service Provider Maintenance

4.1 Routine Maintenance

The MARK 5 NUVO Lite unit has three filters that require inspection and scheduled maintenance or

replacement.

To ensure that the output of oxygen from the unit is within specification, you must perform an oxygen
concentration test. Test the unit upon delivery to a patient and at periodic intervals. Home Service
Providers, based on their expertise and documentation, should establish and implement their own
practices for checking oxygen concentration. The interval established may be longer or shorter than 90
days, which is the default time period recommended for providers who do not choose to establish their
own method.

Nidek Medical does not require preventive maintenance on the concentrator. You do not need to
perform any maintenance as long as the MARK 5 NUVO Lite unit remains within specifications at the
prescribed flow rate. (Refer to Section 2.4)

4.1.1 Cabinet Air Filter

The external cabinet air filter is located on the back of the unit, You can easily remove it by hand.
Instruct the patient to clean this filter weekly. (Refer to Section 3.2.1.)

NOTE:

The filter may require more frequent cleaning if the MARK 5 NUVO Lite unit operates in a harsh
environment such as a house heated by wood, kerosene, or oil, or one with excessive cooking,
cigarette smoke or atmospheric dust.

4.1.2 Final Product Filter Replacement

The final product filter does not require periodic replacement; it needs to be replaced only if it restricts
oxygen flow. It is suggested that it be replaced whenever the sieve module is repaired or replaced and
after the compressor is rebuilt.

1. Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the upper upper cabinet back to locate the final product filter.

NOTE: Observe the position of the filter ( flow direction ) before removal.

3. Separate the silicone tubing from both sides of the filter.

4. Install the new filter with the inlet side in the same position as before. Push the tubing together
so that it overlaps the barbs of the final product filter connections.

5. Record information about the final product filter replacement in Appendix 11 of this manual and
online at www.nidekmedical.com under the ‘Maintenance Log’ tab.

6. Reinstall the upper upper cabinet back.

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4.1.3 Compressor Inlet Air Filter Replacement

The inlet air filter requires inspection at each patient visit. The filter should be replaced every 2 years,
or more often depending on environment.

1. Set the unit I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the cabinet air filter to locate the inlet air filter.

3. Remove filter from the unit, and replace with a new filter.

4. Record information about the filter replacement in Appendix 11 of this manual and online at
www.nidekmedical.com under the ‘Maintenance Log’ tab.

5. Reinstall the cabinet air filter.

NOTE: The filter may require more frequent cleaning if the MARK 5 NUVO Lite unit operates in a
harsh environment such as a house heated by wood, kerosene, or oil, or one with excessive cooking,
cigarette smoke or atmospheric dust.

4.1.4 Recording Maintenance

As the Home Service Provider, it is suggested that you record all routine maintenance and repairs
performed on the MARK 5 NUVO Lite unit, including hours and dates of service in Appendix 11 of this
manual and online at www.nidekmedical.com under the ‘Maintenance Log’ tab.

4.2 Cleaning Unit

Periodically, use a damp cloth to wipe down the exterior case of the MARK 5 NUVO Lite. If you use
medical disinfectants, be sure to follow manufacture’s instructions.

4.2.1 Preparing for New Patient Use

When you remove the MARK 5 NUVO Lite from a patient’s home, always dispose of the used nasal
cannula and humidifier bottle. Inspect the humidifier tube and clean or replace as needed.

Replace the cabinet air filter between each patient’s use or clean with warm soapy water if it is in good
condition. Clean this filter at least once per week or more frequently if operated in a dusty
environment.

Retest the MARK 5 NUVO Lite before you return it to your inventory.

5.0 Service

5.1 Components

The design of the Nidek Medical MARK 5 NUVO Lite Oxygen Concentrator allows for easy access and
removal of most components. This allows you to perform scheduled maintenance, repair, and
replacement of parts with minimal time and effort. The inlet air filter is conveniently located behind the
cabinet air filter on the upper cabinet back.
Caution: For your safety, be sure to set the I/0 (ON/OFF) switch to 0 (OFF) position and unplug the
power cord before you service the MARK 5 NUVO Lite Oxygen Concentrator.
Note: Record all scheduled maintenance on the Maintenance Log found in Appendix 10.
(Refer to Section 4.1.4)

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5.2 Cabinet Removal

5.2.1 Removing Cabinet Back

The cabinet back consists of a lower section and an upper section. Almost all maintenance functions
can be accomplished by removing only the upper section. Stand the device on its casters facing the
back. Remove five screws, two at the top near the handle and three near the bottom of the upper
section.

5.2.2 Caster Replacement

The casters are a push in type that does not require a fastener. Lay the device on its back to access
the casters from the bottom. Pull them straight out away from the bottom.

5.3 Compressor

The compressor is the pump within the oxygen concentrator that supplies air to the separation process
performed by the sieve beds. The pressure generated by the compressor forces oxygen to flow out of
the top of the sieve columns.

The compressor is the likely cause of two potential specific problems:

a. An insufficient amount of air is supplied to the process, and
b. An excessive sound level.

● Air Supply

Compressor output refers to how much compressed air the compressor can produce. This depends
upon the model of the compressor, length of stroke, piston diameter, speed of rotation and condition of
seals. The cup seals form the seal between the piston and the cylinder wall. As the cup seals wear,
the output begins to gradually decrease.

This reduction in compressor output results in less air, and thus less oxygen, entering the sieve beds.
Therefore, the production of oxygen decreases. The minimum air volume required for full oxygen
capacity is 62 l/min (2.2 scfm) for 230 V devices and 68 l/min (2.4 scfm) for 115 V devices.

Because this drop in oxygen production occurs over a long period of time, preventive maintenance on
the compressor is not required.

You can continue a patient’s therapy on the MARK 5 NUVO Lite unit as long as the oxygen
concentration level at the prescribed liter flow rate is within Nidek Medical’s specification limits. Refer
to Section 2.4.

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A ir F lo w

M et e r

0 t o 1 0 0 l/m in

P res su re

1 b a r

P re s s u re

G a u g e

F low

C o m p re s s o r

R es t r i c to r

A ir

F ilt e r

● Sound Level

The sound level is largely determined by the condition of the compressor’s bearings.
There are four bearings located within the compressor that allow the inner components of the
compressor to rotate. If the bearings wear to the point that they become loose and noisy, the
compressor becomes noticeably loud and needs servicing. The life of a compressor is determined
primarily by its operating temperature. It is extremely important that the inlet cooling air filters are
cleaned and replaced as required.

5.3.1 Compressor Replacement

Remove Compressor Assembly

To remove the compressor assembly for exchange, follow the steps listed below:

1. Set the unit’s I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the both the upper and lower cabinet back sections. Requires removal of nine

(9) screws.

3. Disconnect the suction tube and the discharge tube.

4. Disconnect the two compressor power cable leads and the two leads to the capacitor.

5. Slide the compressor assembly from the cabinet.

6. Remove compressor from the compressor support frame.

7. Remove heat exchanger from compressor.

8. Remove the heat exchanger fitting from the compressor.

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Compressor Assembly Installation

To install a new compressor, follow the steps listed below:

1. Perform the compressor removal procedure in reverse order.

2. Leak test all connections.

5.3.2 Capacitor Replacement

The capacitor helps the compressor to start and run more efficiently. If the compressor cannot start,
the capacitor may be defective and require replacement. The capacitor should be replaced at each
compressor service. To replace the capacitor, take the following steps:

1. Set the unit’s I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the upper cabinet back.

3. Disconnect the two leads to the capacitor and clip the tie wrap securing the capacitor.

4. To install the new capacitor, connect the leads and replace the capacitor and install a
new tie wrap.

5. Clip excess after securing capacitor.

5.4 Process Control Valve

The MARK 5 NUVO Lite uses a solenoid powered poppet valve assembly to control the air separation
process. There is a feed port that connects to the compressor and an exhaust port that discharges
through an integral exhaust muffler. There are three possible valve states as follows:

1. Air feed connected to sieve bed A and exhaust connected to sieve bed B.

2. Air feed connected to sieve bed B and exhaust connected to sieve bed A.

3. Both ports open; this is a very short time period during which air

pressure builds in the sieve beds.

The control valve of the MARK 5 NUVO Lite requires no scheduled maintenance. If a valve does not
function as required, it is best to replace the complete sieve module as it is probable that one or both of
the beds has been damaged.

5.5 Sieve Bed Replacement

CAUTION:

Do not expose molecular sieve (contents of bed) to air for an extended period of time. Prolonged
exposure of molecular sieve to the moisture in room air results in contamination and permanent
damage to the sieve material. Keep all openings to the sieve beds sealed during periods of storage.

 NOTE: It is recommended to replace the sieve beds and control valve as a

complete assembly.

2010-8407 Rev A January 2013 15 of 40

5.5.1 Sieve Bed Removal

1. Set the unit’s I/0 (ON/OFF) switch to the 0 (OFF) position and unplug the power cord.

2. Remove the upper cabinet back.

3. Disconnect the compressor discharge 5/16” tube from the top of the solenoid valve and
the product tube from the regulator

4. Unplug the solenoid valve electrical leads at the solenoids

5. Lift the module up and out of the cradle.

5.5.2 Sieve Bed Installation

To install the sieve beds, follow the sieve bed removal procedure in reverse order. It is very important
to ensure that the tubes are fully inserted into the fittings to eliminate leaks.

To check for leaks, take the following steps:

1. Plug in the unit.

2. Set the unit’s I/0 (ON/OFF) switch to I (ON) for three minutes with the flow meter closed
to pressurize the system

3. Apply soapy water around the tubing connections at the valve; check for leaks.

Caution: There is an electrical shock hazard with the Power ON. Be careful that no water
contacts any of the electrical connections.

 NOTE: Even small leaks can affect concentrator performance and can cause
contamination of the sieve. Careful leak testing is important.

5.6 Cabinet Fan Replacement

The cabinet fan for the MARK 5 NUVO Lite is located adjacent to the compressor. Refer to the
troubleshooting chart in Section 6.0 of this manual for instances where replacement of the fan may be
required.

To replace the cabinet fan in the Mark5 Nuvo® unit, take the following steps:

1. Set the unit’s I/0 (ON/OFF) switch to the 0 (OFF) position and unplug the power cord.

2. Remove the back cabinet.

3. Disconnect the fan leads.

4. Lift out the fan.

5. Install isolation foam around new fan.

6. Insert into cabinet and connect the fan leads.

7. Reinstall the back cabinet.

5.7 Circuit Board Replacement

There is but one printed circuit board within the MARK 5 NUVO Lite. It controls the alarm system
functions and also controls the timing logic for the solenoid valves. Consult the troubleshooting chart
in Section 6.0 to determine which and when to replace the printed circuit board.

2010-8407 Rev A January 2013 16 of 40

CAUTION:

The Printed Circuit board (PCB) contain components that are sensitive to electrostatic discharge (ESD)
that can damage the board if not handled properly. As when handling any ESD sensitive PCB, observe
standard ESD safety procedures. These procedures include the following:

• Handle the PCB by the edges only.

• Work on a grounded ESD mat.

• Wear a grounded wrist strap.

• Store PCB in anti-static bags only.

5.7.1 Circuit Board Removal (Note that the Circuit Board on the OCSI unit is different to the
Circuit Board on the standard unit.)

1. Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the upper cabinet back.

3. Remove the flow control valve.

4. Disconnect the 7-pin connector from the upper circuit board.

5. Disconnect tubing from each end of the black sensor tube on the OCSI unit, 5. noting
their position and orientation.

6. Non OCSI units: Cut tie-wrap and remove pressure sensor line.

7. Remove the screws that attach the board to the front cabinet.

8. Remove the circuit board.

NOTE: Handle the new circuit board only by the edges to prevent electrostatic damage to the
unit.

For Reinstallation reverse the above procedure.

The printed circuit board includes two LED's that are visible inside the unit. They have been

added to assist the service technician in determining that the solenoid valves have power to them and
are cycling. Also, the new board flashes the green LED during the startup phase to indicate that the
device has power. The flashing green LED is continuous when oxygen concentration reaches the
specified level.

5.8 Product Regulator Check and Setting

The product regulator enables you to set the maximum flow of oxygen output by the MARK 5 NUVO
Lite unit. To check for proper adjustment of the product regulator, take the following steps:

1. Set the I/0 (ON/OFF) switch to the I (ON) position.

2. Allow the unit to run for a few minutes.

3. Connect a pressure gauge directly to the patient outlet.

4. The pressure should read 7.1 psig (49 kPa) ± 10%.

5. If it requires adjustment, remove the upper cabinet back and lift out the module
enough to access the regulator.

6. Adjust the regulator as necessary. Turn the knob clockwise to increase the output pressure.
(Requires a 3/32 hex wrench)

7. Reinsert the module assembly and reinstall the upper cabinet back.

2010-8407 Rev A January 2013 17 of 40

5.8.1 Product Regulator Cleaning or Rebuilding

Clean or rebuild the product regulator if the regulator cannot be adjusted.

I. Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord,

2. Remove the back cabinet.

3. Remove the regulator from the tee on top of the solenoid valve assembly.

4. Adjust the product regulator fully counterclockwise to unload the spring. This makes
disassembly and reassembly easier.

5. Remove the diaphragm. (Clean or replace it.)

6. Use a hex-head screwdriver to unscrew the diaphragm stem guide located in the center of the
regulator body to gain access to the seat,

7. Remove the seat. Be careful not to lose the spring located behind the seat.

8. Replace the seat or clean by blowing clean air on and around it.

9. With the spring behind the seat, screw the diaphragm stem guide back into the body of the
regulator. (Do not over tighten.)

10. Install a clean or replacement diaphragm.

11. Put the large spring and slip ring into the bonnet, and screw the bonnet onto the regulator
body.

12. Reinstall the regulator.

13 Reset the product regulator as described in Section 5.8.

5.9 Pressure Monitoring Board Replacement (Standard Unit, Non OCSI only)

The high and low pressure alarms are activated by a pressure transducer located on the printed circuit
board.

1. Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the upper cabinet back.

3. Disconnect the 7 pin connector from the circuit board.

4. Disconnect tubing from pressure sensor by cutting tie-wrap.

5. Remove the circuit board and replace with a new one.

6. Test the alarm system, as described in Section 2.3.

7. Reinstall the upper cabinet back.

5.10 Circuit Breaker Replacement

5.10.1 Circuit Breaker Removal

1. Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the upper cabinet back.

3. Disconnect the circuit breaker leads.

4. Unscrew the circuit breaker while you apply pressure to the circuit breaker retaining ring.

5.10.2 Circuit Breaker Installation

Follow the removal procedure for the circuit breaker in reverse order to install the new circuit breaker.

2010-8407 Rev A January 2013 18 of 40

5.11. I/0 (ON/OFF) Power Switch Replacement

5.11.1 I/0 (ON/OFF) Power Switch Removal

1. Set the I/0 (ON/OFF) switch to the 0 (OFF) position and unplug the power cord.

2. Remove both the upper cabinet back.

3. Disconnect the I/0 (ON/OFF) switch leads from the back of the switch being careful to note the
position of each.

4. Push on the back of the power switch, while holding in its four retaining tabs, and remove the
switch through the front of the control panel.

5.11.2 I/0 (ON/OFF) Power Switch Installation

Follow the removal procedure for the I/0 (ON/OFF) power switch in reverse order to install a new power
switch.

5.12 Buzzer Replacement

The buzzer is a fixed component on the circuit board and is not individually replaceable.

5.13 Hour Meter Replacement

1. Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the upper cabinet back.

3. Disconnect the hour meter leads.

4. Remove the hour meter from the front cabinet.

5. Install the new hour meter into its mounting location. Make sure that the hour meter is mounted
right side up.

6. Reconnect the hour meter leads.

7. Reinstall the upper cabinet back.

5.14 Flow Valve Replacement

5.14.1 Flow Valve Removal

1. Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the upper cabinet back.

3. Remove the two hoses from the back of the flow valve.

4. Remove the knob from the flow valve, and the two Philips screws below the knob.

5. Remove the flow valve.

5.14.2 Flow Valve Installation

To install a new flow valve, follow the flow valve removal procedure in reverse order. Then
perform a leak test on the connections.

5.15 Power Cord Replacement

1. Set the I/0 (ON/OFF) switch to the 0 (OFF) position and unplug the power cord.

2. Remove both the upper and lower cabinet back sections. Clip the power cord retaining tie wrap

2010-8407 Rev A January 2013 19 of 40

3. Slide the power cord strain relief reinforcement upwards to remove it from the mounting location

PRODUCT OUT TO

at the bottom of the front cabinet.

4. Disconnect the power cord leads from the terminal quick connects.

5. Connect the leads on the new power cord at the terminal quick connects.

6. Reinstall the power cord strain relief into the base of the unit.

Reconnect the upper cabinet back and install a new power cord retaining tie wrap.

6.0 Troubleshooting

6.1 Air Pressure Test (P1)

Testing the operating pressure is a useful diagnostic tool when a concentrator has low purity
and requires servicing. Units functioning normally do not require operating tests.
Use the following procedure to test the operating pressure of the unit.

1. Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the cabinet rear

3. Remove the air supply tubing going to the control valve and install the test
port tee fitting. Figure 6.1.1 shows the normal operating configurations for each type of unit.

Figure 6.1.2 shows the installation of the test ports.

4. Connect the pressure test gauge to the test port.

5. Plug in the power cord, and set the I/0 (ON/OFF) power switch to the ON position. Set the flow

selector knob to 5 l/min, and allow the unit to run at least five minutes.

6. Observe the maximum and minimum readings on the pressure test gauge.

7. The maximum reading should not exceed 34 psig (235 kPa). The minimum reading should not

be less than 10 psig (70 kPa).

NOTE When you turn the unit on, it will take several minutes to reach normal operating

pressures.

FLOW CONTROL

VALVE

2010-8407 Rev A January 2013 20 of 40

INLET FROM

COMPRESSOR

Figure 6.1.1 Normal Operating Configuration

P2 TEST PORT

6.1.2 Test Ports

6.1.1 High Air Pressure (P1)

Higher than normal operating pressure may indicate any of the following:

● A restrictive exhaust muffler, which does not allow the waste (purge) gas to exit the system

freely.

P1 TEST PORT

● Contaminated sieve beds. Change the sieve beds.

6.1.2 Low Air Pressure (P1)

Lower than normal operating pressure may indicate any of the following:

● A restriction in the suction resonator or inlet air filter, this limits the amount of room air

available to the compressor. Disconnect the suction tube at the compressor, and allow the
unit to operate without the suction resonator to see if normal operating pressure returns.

● An improperly operating control valve. Confirm that the control valve does not have a leak.

● A leak in the unit, which allows system pressure to escape. Leak test the unit.

● A compressor with reduced output.

Ensure that the concentration level at the desired liter flow is within specifications listed in section 2.4.
If it is below specifications, replace or repair the compressor.

2010-8407 Rev A January 2013 21 of 40

6.2 Product Pressure Test (P2)

Testing the product pressure is a useful diagnostic tool when a concentrator has low purity and
requires servicing. Units functioning normally do not require operating tests.

Use the following procedure to test the product pressure of the unit.

1. Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.

2. Remove the rear cabinet. Remove the cap from the regulator test port and install the test port

tee. Figure 6.1.1 & 6.1.2.

3. Remove the cap from the regulator test port and install the test port tee. Figure 6.1.1 & 6.1.2

shows the normal operating configurations for each type of unit. Figure 6.1.3 shows the
installation of the test ports.

4. Connect the pressure test gauge to the P2 test port.

5. Plug in the power cord, and set the I/0 (ON/OFF) power switch to the ON position. Set the flow

meter to 5 l/min, and allow the unit to run at least five minutes.

6. Observe the maximum and minimum readings on the pressure test gauge.

The maximum reading should not exceed 32 psig (220kPa). The minimum reading should not
be less than 9 psig (62 kPa).

6.2.1 Low Product Pressure (P2)

Lower than normal operating pressure may indicate any of the following:

● An inlet air filter that limits the amount of room air available to the compressor. Disconnect

the suction tube at the compressor, and allow the unit to operate without the suction
resonator to see if normal operating pressure returns.

● An improperly operating control valve. Confirm that the control valve does not have a leak.

● A leak in the unit, which allows system pressure to escape. Leak test the unit.

● A compressor with reduced output. Ensure that the concentration level at the desired liter

flow is within specifications listed in Section 2.4. If it is below specification, replace or repair
the compressor.

6.2.2 High Product Pressure (P2)

Higher than normal operating pressure may indicate any of the following:

● A restrictive exhaust muffler, which does not allow the waste (purge) gas to exit the system

freely.

● Check exhaust muffler for any restrictions

● Contaminated sieve beds. Change the sieve beds.

2010-8407 Rev A January 2013 22 of 40

6.3 General Troubleshooting

Before reviewing the troubleshooting chart, the following steps may be useful to isolate any
malfunctions:

1. Turn the concentrator on. If unit does not turn on, refer to troubleshooting chart.

2. Make sure all filters are clean.

3. Connect test pressure gauge to the outlet fitting of the unit. The pressure should read 7.1 psig
(49 kPa) ± 10%.

4. Connect test pressure gauge to the P1 test port on the module. The pressure should be
cycling between approximately 10 and 34 psig (70 and 235 kPa).

5. Make sure the unit is cycling properly by observing the pressure gauge cycle between a high
and a low pressure. If the unit is not cycling properly, refer to troubleshooting chart.

6. Make sure that the unit is leak free by testing all tubing connections and fittings with leak testing
solution. Protect circuit board from solution and start leak test at the heat exchanger, following
the air flow through the unit to the oxygen outlet. Repair all leaks by tightening connections and
fittings.

7. Set the concentrator at 5 l/min and connect pressure test gauge to P2 at the top of the sieve
beds. Determine pressure parameters by observing high and low pressure points on the gauge. It
should cycle between approximately 9 psig and 32 psig (62 to 220 kPa). If pressures are high or
low, refer to the troubleshooting chart.

8. Review troubleshooting chart on next page to isolate and repair any other malfunctions.

2010-8407 Rev A January 2013 23 of 40

Low Oxygen

Concentration

Verify Oxyg en

Flow Rate

Measu re Air

Pressure

Low Pressure High Pressure

Re place Air

Inlet Filter

Re place

Check for

Leak s

Muffler
Foams

Ch eck the

Co m pressor

Check

Co ntro l

Valve

No rmal Air

Pressure

Measu re the

Oxyge n Pressu re

Low Pressure High Pressure

Check for

Leak s

Ch eck the

Co ntro l

Valve

Replace

Muffler
Foams

Re place

Sieve

Module

No rm al Pressure

Ch eck for leaks at the:

- regulator outlet

- product tubing

- oxygen ou tlet

2010-8407 Rev A January 2013 24 of 40

PROBLEMS POSSIBLE CAUSES SOLUTIONS

Compressor runs with
intermittent high pressure
alarm and low oxygen
concentration.

Defective sieve beds.
Restriction in exhaust muffler.

Defective valve.

Replace sieve beds.

Replace or clean muffler.

Replace sieve module

Compressor relief valve
releases (popping sound).

Constant alarm with I/0
(ON/OFF) switch in ON
position. Circuit breaker
repeatedly trips.

Alarm does not sound.

Flow fluctuates.

Defective control valve.

Contaminated sieve beds.

Defective relief valve.
Defective circuit breaker.

Defective capacitor.

Defective compressor.

Defective circuit board.

Faulty electrical connection.
Faulty electrical connection.

Defective I/0 (ON/OFF) switch.

Defective buzzer.

Defective pressure sensor.

Improperly set or faulty product
regulator.

Leak.

Replace sieve module.

Replace sieve module.

Replace relief valve.
Replace circuit breaker.

Replace capacitor.

Replace compressor.

Replace circuit board.

Repair electrical connection.
Repair electrical connection.

Replace I/0 (ON/OFF) switch.

Replace board.

Replace and test control
board.

Check regulator setting/clean,
repair, or replace regulator.

Leak test.

Cabinet fan does not turn.

2010-8407 Rev A January 2013 25 of 40

Worn compressor.

Defective flow valve.

Kinked tubing

Defective cabinet fan.

Defective electrical connections.

Replace compressor

Replace flow valve.

Check tubing that connects the
top of the sieve beds.
Replace cabinet fan.

Check electrical connections.

PROBLEMS POSSIBLE CAUSES SOLUTIONS

Limited or Iow flow.

Restriction in humidifier or
tubing.

Replace humidifier or tubing.

Low concentration.

Product regulator set too low.

Leak.

Weak compressor.

Air flow obstruction.

Compressor inlet filter is dirty or
partially blocked.

System leak

Faulty compressor

Unit temperature too high,

Contaminated sieve beds.

Adjust regulator setting.

Leak test and repair leak.

Check system pressure, and
rebuild or exchange
compressor.

Check Filter, suction resonator,
and suction tube for
obstruction.
Replace inlet filter.

Leak test and repair leak.

Check system pressure, and
rebuild or replace compressor.

Blocked air intake or defective
cabinet filter.

Check that P1 and P2
pressures are within range.
Replace sieve module.

Limited or Iow flow.

Defective control valve.

Restriction in exhaust muffler,

Restriction in suction resonator.

Restriction in humidifier or
tubing.

Product regulator set too low.

Leak.

Repair or replace sieve
module.

Replace or clean exhaust
muffler.

Check suction resonator and
suction tube for obstruction
and remove.
Replace humidifier or tubing.

Adjust regulator setting.

Leak test and repair leak.

Check system pressure, and
rebuild or exchange
compressor.

Check Filter, suction resonator,
and suction tube for
obstruction.

2010-8407 Rev A January 2013 26 of 40

6.5 Tool Kit, Oxygen Purity testing and Pressure Test Gauge

The tools needed for you to properly service the MARK 5 NUVO Lite unit are listed below:

● Requires no special tools; generally available tools including common pliers, channel lock,

wire cutters, needle-nose pliers, slotted-head screwdriver, long Phillips head screwdriver,
8-inch adjustable wrench, 7/16-inch socket, 7/16-inch combination wrench, 5/8-inch
combination wrench and 3/8-inch combination wrench.

● For checking the Oxygen purity at the Concentrator.

Nidek Medical recommends oxygen analyzer Part # 6500-4220

● An accurate pressure test gauge to take both P-1 and P-2 pressure readings on the

MARK 5 NUVO Lite unit should be kept available at all times. This gauge kit allows
connections to the pressure test locations.

Kit for testing P1 & P2 pressures with gauge supplied # 6500-0051
Kit for testing P1 & P2 pressures w/o gauge supplied # 6500-0052
Kit tools for Nuvo Lite # 6500-0053

Appendices

A-1: OCSI Pneumatic Diagram 29
A-2: Standard Pneumatic Diagram 29
A-3: No-Flow Alarm Pneumatic Diagram 30
A-4: 115 / 230 Volt Electrical Schematic 31
A-5: Compressor Assembly
A-5-A Compressor Assembly Parts

32

33
A-6: Cabinet Front Assembly 34
A-6-A: Cabinet Front Parts 35
A-7: Cabinet Back Assembly 36
A-7-A: Cabinet Back Parts 37
A-8: Module Assembly 38
A-8-A: Module Assembly Parts 39

A-9 Service and Maintenance Log 38

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A-1

Flow Schematic OCSI Option

A-2

Flow Schematic Standard Non-OCSI Option

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Notes:

Compressor Resistance

230V: ~290 Ohms

115V: ~ 10 Ohms

Fan Resistance

230V: ~715 Ohms

115V: ~275 Ohms

Wire Colors

R = Red

For 115 V, place jumpers from

terminal 1 to 2 and terminal 3

Electrical Schematic

A-6

COMPRESSOR ASSEMBLY

BL = Blue

BR = Brown

GR = Green

YL = Yellow

230 V shown with jumper

from terminal 2 to 3 on J2.

to 4.

2010-8407 Rev A January 2013 29 of 40

2010-8407 Rev A January 2013 30 of 40

Reference I.D. Description

8400-1513 1 SHUNT, VOLTAGE SELECTION 1 EA

8400-0110 4 BRACKET,COMPRESSOR 1 EA
8400-1052 6 FITTING,COMPRESSOR 1 EA
8400-1053 6 FITTING,COMPRESSOR 1 EA
8400-0116 7 SPRING, COMPRESSION 4 EA
8400-0197 8 EXCHANGER,HEAT 1 EA
8400-1161 9 TUBING,5/16ODx3/16IDx12.5"LG. 1 EA
8400-1163 10 FITTING HX 1 EA
9250-1330 16 CORD, POWER, EUROPLUG 230 V 1 EA

9250-1311 16*

8400-1332 16 CORD, POWER, CHINA 230 V 1 EA
8400-1340 16 CORD, POWER, SWISS 230 V 1 EA
8400-1341 16 CORD, POWER, UK 230 V 1 EA
8400-1342 16 CORD, POWER, ISRAEL 230 V 1 EA
8400-1343 16 CORD, POWER, INDIA 230 V 1 EA
8400-1019 17 BREAKER, CIRCUIT 5 AMP 230 V 1 EA
8400-1008 18 SWITCH,POWER UNIVERSAL 1 EA
9250-1023 19 FAN,115V LOW NOISE 1 EA
9250-1034 19 FAN, 230V LOW NOISE 1 EA

8400-1047
8400-1042

8400-2450 21 COMPR. 2450 115V/60HZ 5LPM 1 EA
8400-2460 21 COMPR. 2450 230V/50HZ 5LPM 1 EA
8400-2466 21 COMPR. 2450 230V/60HZ 3LPM 1 EA
8400-2456 21 COMPR. 2450 230V/60HZ 5LPM 1 EA
8400-2455 21 COMPR. NIDEK, 115V/60HZ 5LPM 1 EA
8400-2465 21 COMPR. NIDEK, 230V/50HZ 5LPM 1 EA
8400-1014 23 WASHER SPLIT RETAINING 4 EA
8400-1011 24 LIMITER COMPRESSOR 4 EA
8400-1009 25 CAP, VINYL 3-16" 4 EA
8400-1017 26 GROMMET, SPRING EYE 4 EA
8400-8450 99 KIT, COMP. PLATE ASSY 1 EA

2020CAPACITOR, 230 V 8 μF P2

CORD,POWER, TYPE "K" PLUG, 115 V
US

CAPACITOR, 115 V 20 μF P2

No.

Req’d

1 EA

1
1

Unit

EA
EA

A-6-A

PARTS, COMPRESSOR ASSEMBLY

2010-8407 Rev A January 2013 31 of 40

A7

CABINET, FRONT ASSEMBLY (OCSI & non-OCSI)

2010-8407 Rev A January 2013 32 of 40

Reference I.D. Description

8400-0102 1 CABINET, FRONT 1 EA

8400-0104 2 COVER, RESONATOR 1 EA

8400-0107 3 O-RING, RESONATOR COVER 1 EA

8400-1700 4 VALVE, FCV 1/8-5.0 LPM 1 EA

8400-1331 5 KNOB,FLOW 0.125 TO 5.0 FLOW 1 EA

9251-1332 6 RING,LOCK-OUT 1 EA

9251-1335 7 CLIP,D STYLE 1 EA

8400-1020 8 FITTING, OXYGEN OUTLET 1 EA

8400-0128 9 HOSE, COMPRESSOR SUCTION 1 EA

8400-1029 10 NUT 3/8-24 O2 OUTLET LITE 1 EA

7631-1053 11 FILTER, FINAL PRODUCT 1 EA

6956-9674 12 VALVE, CHECK 1/4 HOSE MPC A975 1 EA

8400-1059 13 ADAPTER, FILTER 1 EA

7854-6050 14 HOSE 5/32 X 11/32 X 2 LG SILIC 1 EA

7854-6054 16 HOSE 5/32 X 11/32 X 2 LG SILIC 1 EA

7854-6055 17 HOSE 5/32 X 11/32 X 7"LG SIL 1 EA

9250-1041 18 HOSE 5/32 X 11/32 X 5 LONG SIL 1 EA

8400-1308 20 BOARD,TIMING OMS 9V 5LPM 1 EA

9250-1045 21 SCREW,PLASTITE#4X3/8" PAN.HD 8 EA

8400-1522 22 WIRING HARNESS, UNIVERSAL 2 EA

9250-1062 23 TY-WRAP 14” LG 1 EA

8400-5018 24 HOURMETER 1 EA

8400-1059 25 ADAPTER, FILTER 1 EA

8400-1436 26 SCREW, M3.5 X 0.6 X 8 mm LG 4 EA

8400-1041 27 ISOLATOR, FAN 1 EA

8400-1019 28 BREAKER, CIRCUIT 5 AMP 1 EA

8400-1008 29 SWITCH, POWER, UNIVERSAL 1 EA

8400-0113 30 BUMPER, MODULE 1 EA

No.

Req’d

Unit

A-7-A

PARTS

FRONT CABINET ASSEMBLY (OCSI & non-OCSI )

2010-8407 Rev A January 2013 33 of 40

A-8

BACK CABINET ASSEMBLY

2010-8407 Rev A January 2013 34 of 40

Reference I.D. Description

8400-0101 1 CABINET, BACK LOWER 1 EA

8400-0103 2 CABINET, BACK UPPER 1 EA

8400-1025 3 FILTER,CABINET INLET 1 EA

8400-0108 4 FILTER FRAME 1 EA

8400-0022 5 RETAINER, CORD HOOK&LOOP 1 EA

8400-0029 7 RETAINER,CORD BUCKLE 1 EA

8400-0023 8 RETAINER,CORD RIVET 3 EA

8400-1180 9 FILTER AIR COMPRESSOR 1 EA

8400-0113 10 MODULE BUMPER 4 EA

8400-0114 11 CLAMP, POWER CORD 1 EA

8400-0115 13 SCREW, #14x 1"LG PLASTITE 9 EA

No.

Req’d

Unit

A-7-A

PARTS

CABINET BACK ASSEMBLY

A-8

2010-8407 Rev A January 2013 35 of 40

A-8

MODULE ASSEMBLY

2010-8407 Rev A January 2013 36 of 40

Reference I.D. Description

8400-1060 1 REGULATOR, 2-PORT 1 EA

8400-1165 2 FITTING VALVE 5/16"X3/8 1 EA

8400-1200 3 VALVE ASSY 1 EA

8400-1236 28 TEE,ADAPTER NYLON 1 EA

8400-1253 29 O-RING, REGULATOR TEE -204 1 EA

8644-9401 30 PLUG, 1/4~ ODT PUSH IN 1 EA

8400-8009 A MODULE (LESS VALVES) 1 EA

A-8-A

PARTS

MODULE ASSEMBLY REPLACEMENT

No.

Req’d

Unit

2010-8407 Rev A January 2013 37 of 40

Nidek Medical Oxygen Concentrator Service and Maintenance Log

Model Number ________________
Initial Inspection

1. Upon receipt, check the unit for shipping
damage. Notify shipping company if damaged.

2. Verify that cabinet air filter and the inlet air filter
are in place.

3. Plug the unit into an electrical outlet, turn the
unit 'ON,’ and check the audible/visual alarms.

4. Set the flow meter/flow control at the maximum
recommended flow rate and allow the unit to run
for 15 minutes.

5. Using a calibrated oxygen analyzer, verify
concentration is greater than 87 percent.

Serial Number ___________________

Between-Patient Maintenance

1. Remove oxygen tubing, cannula, and humidifier
bottle and discard.

2. Wash or replace the humidifier tubing if used.

3. Wash or replace the cabinet air filter.

4. Clean the concentrator cabinet.

5. Check oxygen concentration and flow. If the unit
performs within specification, the final product filter
does not need to be replaced between patients.

Patient/Caregiver Maintenance

Routine Service Check

Perform routine servicing as shown in the chart
below. Record the activities performed in the log
provided on the following page.

1. Record the elapsed usage time in hours.

2. Check oxygen concentration with a calibrated
oxygen analyzer.

3. Verify audible alarm and indicator light functions
between patients and every two years.

4. Inspect filters and replace as necessary.

Standard Servicing Intervals are shown below. Intervals used by the homecare service provider

and/or patient caregiver should be more frequent when conditions of usage dictate.

1. Inspect the Oxygen tubing, cannula, and
humidifier bottle - clean as needed according to
manufacturer’s instructions.

2. Wash the cabinet air filter weekly with a mild
detergent solution. Dry before reinstalling onto the
device.
The routine service intervals shown below depend
on the conditions in which the devices are used.
They reflect the minimum recommendation
when operated in a clean environment. As
conditions can vary widely, the homecare provider
or patient caregiver is responsible to determine:

- the character of the environment in which the
concentrator is to operate.

- a maintenance schedule with intervals based on
the environment in which the unit is
operating/functioning.

Nidek Medical Oxygen Concentrator Routine Service Intervals

Check % Oxygen

Concentration

OCSI Models:

Every 15,000 hours

or 3 years.

Std Models: Every

5,000 hours or 1

year.

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Cabinet Air Filter Inlet Air Filter Final Product Filter Capacitor

Wash the filter

each week in a

mild detergent

solution.

Dry before

reinstalling.

Inspect at each

patient visit.

Replace every 2

years, or more

often depending on

environment.

Replace at each

compressor

service / module

replacement.

Replace at each

compressor

service / module

replacement.

Nidek Medical Oxygen Concentrator Service and Maintenance Log

Please maintain a log of all
maintenance activities performed on
this unit.

Date Hours % O2 Alarms

Check

Inspection Prior to Putting Into Service

In-Service Checks

Serial
Number___________Model_____________

Additional Information (Work Done, Filter Changes,

Comments, etc)

Medical device regulations require users and service personnel to notify manufacturers of any

incidents that, if repeated, could cause injury to any person.

email: [e-mail]

Please update maintenance log information upon each service at www.nidekmedical.com under

the 'Maintenance Log' tab.

2010-8407 Rev A January 2013 39 of 40

3949 Valley East Industrial Blvd.
Birmingham, Alabama 35217

2010-8407 Rev A January 2013 40 of 40