DeVilbiss 525DS User manual

DANGER – NO SMOKING
CAUTION-Federal (U.S.A.) law restricts this device to sale by or on the order of a physician.
DeVilbiss®5-liter Oxygen COnCentratOr
serViCe Manual
MODEL 525DS
MODEL 525DS-Q
MODEL 525KS
MODEL 525KS-LT
MODEL 525PS

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TABLE OF CONTENTS
GENERAL INFORMATION
Introduction............................................................................................................................................................................................................................. 3
Important Safeguards............................................................................................................................................................................................................. 3
Safety Precautions and General Warnings ............................................................................................................................................................................ 3
UNPACKING AND SETUP
Initial Inspection...................................................................................................................................................................................................................... 5
Patient Setup.......................................................................................................................................................................................................................... 5
Operating Instructions ............................................................................................................................................................................................................ 5
MAINTENANCE
Patient Alert System............................................................................................................................................................................................................... 7
Routine Patient Maintenance ................................................................................................................................................................................................. 7
Periodic Homecare Provider Preventative Maintenance........................................................................................................................................................ 7
Warranty ................................................................................................................................................................................................................................. 8
Provider's Notes ..................................................................................................................................................................................................................... 8
Return and Disposal............................................................................................................................................................................................................... 8
Preventative Maintenance Summary ..................................................................................................................................................................................... 8
TROUBLESHOOTING
System Operation................................................................................................................................................................................................................... 9
Normal Operating Sequence.................................................................................................................................................................................................. 9
Simplified Troubleshooting ................................................................................................................................................................................................... 10
Troubleshooting Chart A....................................................................................................................................................................................................... 11
Troubleshooting Chart B ...................................................................................................................................................................................................... 12
Troubleshooting Chart C ...................................................................................................................................................................................................... 12
Troubleshooting Chart D ...................................................................................................................................................................................................... 12
Troubleshooting Chart E ...................................................................................................................................................................................................... 13
Troubleshooting Chart F....................................................................................................................................................................................................... 13
COMPONENT TESTING, REPAIR, AND REPLACEMENT
Proper Repair Procedures.................................................................................................................................................................................................... 14
Cabinet Removal.................................................................................................................................................................................................................. 14
Accumulator Pressure Test .................................................................................................................................................................................................. 15
Auxiliary Oxygen Port........................................................................................................................................................................................................... 16
Capacitor .............................................................................................................................................................................................................................. 16
Check Valves/Manifold ......................................................................................................................................................................................................... 16
Compressor.......................................................................................................................................................................................................................... 16
Cooling Fan.......................................................................................................................................................................................................................... 18
Flow Meter............................................................................................................................................................................................................................ 18
Hour Meter ........................................................................................................................................................................................................................... 19
Manifold................................................................................................................................................................................................................................ 19
Molecular Sieve Beds........................................................................................................................................................................................................... 20
Power Cord .......................................................................................................................................................................................................................... 20
Power Switch........................................................................................................................................................................................................................ 20
Pressure Regulator .............................................................................................................................................................................................................. 21
Printed Circuit Board (PC Board)......................................................................................................................................................................................... 21
Rotary Valve ......................................................................................................................................................................................................................... 21
FIGURES, DIAGRAMS AND PARTS LIST
525DS Unit - Serial #F & 525DS / 525DS-Q Units - Serial #J (115V Units)........................................................................................................................ 23
525DS Unit - Serial #N & 525DS-Q Unit - Serial #R (115V Units with Auxiliary Oxygen Port) ........................................................................................... 25
525KS Unit - Serial #F & 525KS / 525KS-LT Units - Serial #J (220/230/240V Units)......................................................................................................... 28
525KS-LT Unit - Serial #N & 525KS Unit - Serial #R (220/230/240V Units with Auxiliary Oxygen Port) ............................................................................ 30
525PS Unit - Serial #F & 525PS Unit - Serial #J (220/230/240V Units).............................................................................................................................. 33
Accessories and Tools.......................................................................................................................................................................................................... 35
Pneumatic and Wiring Diagrams.......................................................................................................................................................................................... 36
ORDERING INFORMATION AND PARTS RETURN
Ordering Information ............................................................................................................................................................................................................ 38
Parts Return ......................................................................................................................................................................................................................... 38
SPECIFICATIONS................................................................................................................................................................................................................ 39
GUIDANCE AND MANUFACTURER’S DECLARATION.................................................................................................................................................... 40

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GENERAL INFORMATION
INTRODUCTION
This service manual was designed to provide DeVilbiss Healthcare qualied
service technicians and homecare providers with the proper maintenance,
service, safety, and repair procedures for the DeVilbiss Oxygen Concentrator.
Read and understand all the information contained in this service manual before
attempting to operate or perform any maintenance on the concentrator.
An oxygen concentrator is a device that delivers highly concentrated oxygen for
therapeutic applications.
Room air is a mixture of 78% nitrogen, 21% oxygen, 1% argon and other gases.
The concentrator draws in room air, separates the nitrogen from the oxygen, and
delivers concentrated oxygen to the patient through an oxygen port.
For more in-depth classroom type training, contact the Respiratory Technical
Service Department at 1-800-338-1988 (814-443-4881).
NOTE–DeVilbiss reserves the right to alter or change the design of the DeVilbiss
Oxygen Concentrator series. Hence, slight differences in construction or
components may exist between the unit in hand and what is described in this
manual.
IMPORTANT SAFEGUARDS
DANGER
NO SMOKING
Read all instructions before operating the oxygen concentrator. Important
information is highlighted by these terms:
WARNING: Safety information for hazards that might cause serious injury
or death.
CAUTION–Information for preventing damage to the product.
NOTE–Information to which you should pay special attention.
SAFETY PRECAUTIONS AND GENERAL
WARNING:
A warning indicates the possibility of injury to the user or the
operator.
• Oxygen causes rapid burning. Do not smoke while your oxygen
concentrator is operating, or when you are near a person utilizing oxygen
therapy. Keep the oxygen concentrator and cannula at least 5 feet (1.6m)
from hot, sparking objects or naked sources of ame.
• Electric shock hazard. Do not remove cabinet. The cabinet should only be
removed by a qualied DeVilbiss homecare provider.
• Disconnect the power cord from the wall outlet before attempting repairs on
the unit. Extra care should be taken if it is necessary to operate the unit
with the cabinet removed.
• Do not use oils, greases, or any petroleum-based solvents/cleaners on or
near the unit. Use only materials that are compatible with oxygen.
• Electric Shock Hazard. When replacing the capacitor, do not touch the
terminals or allow metal objects to come in contact with the terminals on
the capacitor. The capacitor may hold a charge for several days after the
unit is turned off. The capacitor is located in the base of the unit next to the
cooling fan.
• To ensure you receive the therapeutic amount of oxygen delivery according
to your medical condition, 525 Oxygen Concentrator must:
• be used only after one or more settings have been individually
determined or prescribed for you at your specic activity levels.
• be used with the specic combination of parts and accessories that are
in line with the specication of the concentrator manufacturer and that
were used while your settings were determined.
• For your safety, the oxygen concentrator must be used according to the
prescription determined by your physician.
• Equipment not suitable for use in the presence of a ammable anesthetic
mixture with air or with oxygen or nitrous oxide.
• This device contains electrical and/or electronic equipment. Follow local
governing ordinances and recycling plans regarding disposal of device
components.
• Installation of 515LF-607 low output ow meter package will cause the low
ow alarm to not work.
• Use only water-based lotions or salves that are oxygen-compatible before
and during oxygen therapy. Never use petroleum or oil-based lotions or
salves to avoid the risk of re and burns.
• Do not lubricate ttings, connections, tubing, or other accessories of the
oxygen concentrator to avoid the risk of re and burns.
• Use only spare parts recommended by the manufacturer to ensure proper
function and to avoid the risk of re and burns.
• Use of this device at an altitude above 4000 meters or above a
temperature of 95˚F (35˚C) or greater than 95% relative humidity may
affect the ow rate and the percentage of oxygen and consequently the
quality of the therapy. Refer to specications for details regarding
parameters tested.
• Oxygen makes it easier for a re to start and spread. Do not leave the
nasal cannula or mask on bed coverings or chair cushions if the oxygen
concentrator is turned on but not in use, the oxygen will make the materials
ammable. Turn the oxygen concentrator off when not in use to prevent
oxygen enrichment.
• If you feel discomfort or are experiencing a medical emergency while
undergoing oxygen therapy, seek medical assistance immediately to avoid
harm.
• Geriatric, pediatric or any other patient unable to communicate discomfort
can require additional monitoring and/or a distributed alarm system to
convey the information about the discomfort and/or the medical urgency to
the responsible caregiver to avoid harm.
• Smoking during oxygen therapy is dangerous and is likely to result in facial
burns or death. Do not allow smoking within the same room where the
oxygen concentrator or any oxygen carrying accessories are located. If you
intend to smoke, you must always turn the oxygen concentrator off, remove
the cannula and leave the room where either the cannula or mask or the
oxygen concentrator is located. If unable to leave the room, you must wait
10 minutes after you have turned off the oxygen concentrator before
smoking.
• Open ames during oxygen therapy are dangerous and are likely to result
in re or death. Do not allow open ames within 2 m of the oxygen
concentrator or any oxygen carrying accessories.”
• The Device is classied as IPX0 which means it does not provide
protection from water ingress. Keep the device dry.
• Do not service or clean this device while in use with a Patient.
• Under certain circumstances, oxygen therapy can be hazardous. Seek
medical advice before using an oxygen concentrator.
• When device is used under extreme operating conditions, the temperature
near the exhaust vents on the bottom of the unit may reach 145˚F (63˚C).
Keep body parts a minimum of 32” away from this area.
• Improper use of the power cord and plugs can cause a burn, re, or other
electric shock hazards. Do not use the unit if the power cord is damaged.

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GENERAL INFORMATION
• The DeVilbiss oxygen concentrators manufactured since July 1, 2012
are equipped with a re mitigating outlet tting that prevents propagation
of re into the unit. DeVilbiss oxygen concentrators manufactured prior
to July 1, 2012 must be retrotted by your provider with the re
mitigating outlet tting.
• In order to prevent a re propagating from the patient through the
cannula towards the unit, a means of protection should be located as
close to the patient as practicable. Please contact your provider for this
means of protection.
• Before attempting any cleaning procedures, turn the unit “Off.”
• Use of harsh chemicals (including alcohol) is not recommended. If
bactericidal cleaning is required, a non-alcohol based product should be
used to avoid inadvertent damage.
• Medical Electrical Equipment needs special precautions regarding EMC
and needs to be installed and put into service according to the
Electromagnetic Compatibility [EMC] information provided in the
accompanying documents.
• Portable and Mobile RF Communications Equipment can affect Medical
Electrical Equipment.
• The equipment or system should not be used adjacent to or stacked with
other equipment and that if adjacent or stacked use is necessary, the
equipment or system should be observed to verify normal operation in
the conguration in which it will be used.
CAUTION:
A Caution indicates the possibility of damage to the device.
• Federal (U.S.A.) law restricts this device to sale by or on the order of a
physician.
• It is very important to follow your oxygen prescription. Do not increase or
decrease the ow of oxygen – consult your physician.
• To prevent product damage, do not attempt to operate the unit without
the air lter or while the lter is still damp.
• Do not place a humidier with an oxygen patient unless prescribed by a
physician and then only a bubble-type humidier should be used.
• Do not connect the oxygen concentrator to an electrical outlet controlled
by a wall switch; the outlet should be independent of other appliances.
• Do not use an electrical adapter or extension cord with the oxygen
concentrator.
• Only operate the oxygen concentrator with all lters in place; do not
operate if the air lter is wet.
• Use only DeVilbiss concentrator replacement parts and accessories.
• Do not use regenerated sieve material.

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UNPACKING AND SETUP
INITIAL INSPECTION
It is suggested that an initial inspection be performed upon receiving the oxygen
concentrator.
1. After removing the DeVilbiss Oxygen Concentrator from the carton,
examine it for any external damage. If shipping damage has occurred,
contact the DeVilbiss Customer Service Department at 1-800-338-1988
(814-443-4881) for specic instructions. Save the carton for possible later
return; note the position of the unit and placement of the packing material.
2. Open the lter door and record the number of hours on the hour meter.
Check to make sure the air lter is in place.
3. Check to be sure the intake bacteria lter is in place.
4. Plug the unit into an electrical outlet, turn the unit “On,” and check the
audible and visible alerts.
5. Set the ow meter to maximum recommended liter ow and let the unit run
for at least 20 minutes.
6. Use an oxygen analyzer to check the concentration.
7. With unit still running, unplug to test the power fail alarm.
NOTE–If the unit fails to operate properly (oxygen concentration not within
specication) or if internal damage is found, contact the DeVilbiss Customer
Service Department at 1-800-338-1988 (814-443-4881).
PATIENT SETUP
1. Position the unit near an electrical outlet in the room where the patient
spends most of his or her time.
NOTE–Do not connect to an electrical outlet controlled by a wall switch.
2. Position the unit at least 6 inches (16 cm) from walls, draperies, or any
other objects that might prevent the proper ow of air in and out of the
oxygen concentrator.
3. Locate the unit a minimum of 5 feet (1.6 meters) from replaces, radiators,
heaters, and hot-air registers.
WARNING
Oxygen causes rapid burning. Do not smoke while your oxygen
concentrator is operating, or when you are near a person utilizing oxygen
therapy. Keep the oxygen concentrator and cannula at least 5 feet (1.6m)
from hot, sparking objects or naked sources of ame.
Electric Shock Hazard. Only qualied DeVilbiss Healthcare homecare
providers may remove the cabinet.
4. Attach the appropriate oxygen accessories (oxygen tubing or humidier) to
the oxygen outlet port.
NOTE–A maximum of 50 feet (15 meters) of tubing plus 7 feet (2.1 meters) of
cannula plus a bubble humidier is allowed between the concentrator and the
patient.
NOTE–The oxygen supply accessory (patient tubing) shall be
equipped with a means that in case of re stops the delivery
of oxygen to the patient. This means of protection should be
located as close to the patient as practicable.
Oxygen Tubing Only Connection
1. Thread the cannula tting onto the oxygen outlet port.
2. Attach the 5/32” (4 mm) I.D. oxygen tubing.
Oxygen Tubing with Humidification
Connection
If the physician has prescribed an oxygen humidier as part of the patient’s
therapy, follow these steps (If using a prell, go to Step 3.):
1. Fill the humidier bottle with distilled, demineralized, or boiled water. Do not
overll.
2. Thread the wing nut located on the top of the humidier bottle to the
oxygen outlet port so that it is suspended. Make sure it is securely
tightened.
3. Attach the 5/32" (4 mm) I.D. oxygen tubing, not to exceed 50 feet (15
meters), directly to the humidier bottle outlet tting.
NOTE–For optimum performance, the DeVilbiss Oxygen Concentrator has a
preset nominal output pressure of 8.5 psi (58.6 kPa). Use only “bubble-type”
humidiers. Do not use “jet-type” humidiers.
NOTE–Condensation from the humidier may occur in longer lengths of tubing
or if the tubing is laying on a cold oor.
When ready for operation
1. Attach the nasal cannula to the oxygen tubing (per the manufacturer’s
directions).
2. Follow the Operating Instructions.
OPERATING INSTRUCTIONS
1. Remove the power cord completely from the strap. Make sure the power
switch is in the “Off” position.
2. 115 Volt Units– Insert the plug into an electrical outlet. The DeVilbiss
Oxygen Concentrator uses a two-prong polarized plug and is double-
insulated to protect against electric shock.
220/230/240 Volt Units – Ensure cord is connected to the unit before
inserting plug into an appropriate electrical outlet.
WARNING
The plug on the DeVilbiss 525DS concentrators has one blade wider than
the other. To reduce the risk of electric shock, this plug is intended to t in
a wall outlet only one way. Do not attempt to defeat this safety feature.
Improper use of the power cord and plugs can cause a burn, re, or other
electric shock hazards. Do not use the unit if the power cord is damaged.
Oxygen causes rapid burning. Do not smoke while your oxygen
concentrator is operating, or when you are near a person utilizing oxygen
therapy. Keep the oxygen concentrator and cannula at least 5 feet (1.6m)
from hot, sparking objects or naked sources of ame.
WARNING
The DeVilbiss oxygen concentrators manufactured since July 1, 2012 are
equipped with a re mitigating outlet tting that prevents propagation of
re into the unit. DeVilbiss oxygen concentrators manufactured prior to
July 1, 2012 must be retrotted by your dealer with the re mitigating outlet
tting.
In order to prevent a re propagating from the patient through the cannula
towards the unit, a means of protection should be located as close to the
patient as practicable. Please contact your dealer for this means of
protection.
3. Press the power switch to the “On” position. When the unit is turned “On,”
all four indicator lights (Power, Service Required, Low Oxygen, and Normal
Oxygen) on the front panel will briey illuminate and an audible signal will
sound (the patient alert system) momentarily. After a few seconds, only the