DeVilbiss 525DS, 525DS-Q, 525KS, 525KS-LT Service Manual

DeVilbiss® 5-Liter Oxygen Concentrator
Service Manual
DANGER – NO SMOKING
MODEL 525DS
MODEL 525DS-Q
MODEL 525KS
MODEL 525KS-LT
MODEL 525PS
CAUTION-Federal (U.S.A.) law restricts this device to sale by or on the order of a physician.
TA B L E O F C O N T E N T S
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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G E N E R A L I N F O R M AT I O N
INTRODUCTION
•
This service manual was designed to provide DeVilbiss Healthcare qualified
service technicians and homecare providers with the proper maintenance,
service, safety, and repair procedures for the DeVilbiss Oxygen Concentrator.
•
be used only after one or more settings have been individually determined or prescribed for you at your specific activity levels.
be used with the specific combination of parts and accessories that are
in line with the specification of the concentrator manufacturer and that
were used while your settings were determined.
Read and understand all the information contained in this service manual before
attempting to operate or perform any maintenance on the concentrator.
•
For your safety, the oxygen concentrator must be used according to the
prescription determined by your physician.
An oxygen concentrator is a device that delivers highly concentrated oxygen for
therapeutic applications.
•
Equipment not suitable for use in the presence of a flammable 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 flow meter package will cause the low
flow 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 fire and burns.
•
Do not lubricate fittings, connections, tubing, or other accessories of the
oxygen concentrator to avoid the risk of fire and burns.
•
Use only spare parts recommended by the manufacturer to ensure proper
function and to avoid the risk of fire 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 flow rate and the percentage of oxygen and consequently the
quality of the therapy. Refer to specifications for details regarding
parameters tested.
•
Oxygen makes it easier for a fire 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
flammable. 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 flames during oxygen therapy are dangerous and are likely to result
in fire or death. Do not allow open flames within 2 m of the oxygen
concentrator or any oxygen carrying accessories.”
•
The Device is classified 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, fire, or other
electric shock hazards. Do not use the unit if the power cord is damaged.
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 flame.
•
Electric shock hazard. Do not remove cabinet. The cabinet should only be
removed by a qualified 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:
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G E N E R A L I N F O R M AT I O N
•
The DeVilbiss oxygen concentrators manufactured since July 1, 2012
are equipped with a fire mitigating outlet fitting that prevents propagation
of fire into the unit. DeVilbiss oxygen concentrators manufactured prior
to July 1, 2012 must be retrofitted by your provider with the fire
mitigating outlet fitting.
•
In order to prevent a fire 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 configuration 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 flow of oxygen – consult your physician.
•
To prevent product damage, do not attempt to operate the unit without
the air filter or while the filter is still damp.
•
Do not place a humidifier with an oxygen patient unless prescribed by a
physician and then only a bubble-type humidifier 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 filters in place; do not
operate if the air filter is wet.
•
Use only DeVilbiss concentrator replacement parts and accessories.
•
Do not use regenerated sieve material.
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U N PA C K I N G A N D S E T U P
INITIAL INSPECTION
Oxygen Tubing with Humidification
Connection
It is suggested that an initial inspection be performed upon receiving the oxygen
concentrator.
If the physician has prescribed an oxygen humidifier as part of the patient’s
therapy, follow these steps (If using a prefill, go to Step 3.):
1.Fill the humidifier bottle with distilled, demineralized, or boiled water. Do not
overfill.
2.Thread the wing nut located on the top of the humidifier 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 humidifier bottle outlet fitting.
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 specific instructions. Save the carton for possible later
return; note the position of the unit and placement of the packing material.
2.Open the filter door and record the number of hours on the hour meter.
Check to make sure the air filter is in place.
3.
Check to be sure the intake bacteria filter is in place.
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”
humidifiers. Do not use “jet-type” humidifiers.
4.Plug the unit into an electrical outlet, turn the unit “On,” and check the
audible and visible alerts.
5.Set the flow meter to maximum recommended liter flow 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–Condensation from the humidifier may occur in longer lengths of tubing
or if the tubing is laying on a cold floor.
When ready for operation
NOTE–If the unit fails to operate properly (oxygen concentration not within
specification) or if internal damage is found, contact the DeVilbiss Customer
Service Department at 1-800-338-1988 (814-443-4881).
1.Attach the nasal cannula to the oxygen tubing (per the manufacturer’s
directions).
PATIENT SETUP
OPERATING INSTRUCTIONS
1.Position the unit near an electrical outlet in the room where the patient
spends most of his or her time.
1.Remove the power cord completely from the strap. Make sure the power
switch is in the “Off” position.
NOTE–Do not connect to an electrical outlet controlled by a wall switch.
2.
2.
2.Position the unit at least 6 inches (16 cm) from walls, draperies, or any
other objects that might prevent the proper flow of air in and out of the
oxygen concentrator.
3.Locate the unit a minimum of 5 feet (1.6 meters) from fireplaces, radiators,
heaters, and hot-air registers.
Follow the Operating Instructions.
1 15 Volt Units– Insert the plug into an electrical outlet. The DeVilbiss
Oxygen Concentrator uses a two-prong polarized plug and is doubleinsulated 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 fit in
a wall outlet only one way. Do not attempt to defeat this safety feature.
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 flame.
Improper use of the power cord and plugs can cause a burn, fire, 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 flame.
Electric Shock Hazard. Only qualified DeVilbiss Healthcare homecare
providers may remove the cabinet.
4.Attach the appropriate oxygen accessories (oxygen tubing or humidifier) to
the oxygen outlet port.
WARNING
NOTE–A maximum of 50 feet (15 meters) of tubing plus 7 feet (2.1 meters) of
cannula plus a bubble humidifier is allowed between the concentrator and the
patient.
The DeVilbiss oxygen concentrators manufactured since July 1, 2012 are
equipped with a fire mitigating outlet fitting that prevents propagation of
fire into the unit. DeVilbiss oxygen concentrators manufactured prior to
July 1, 2012 must be retrofitted by your dealer with the fire mitigating outlet
fitting.
NOTE–The oxygen supply accessory (patient tubing) shall be
equipped with a means that in case of fire stops the delivery
of oxygen to the patient. This means of protection should be
located as close to the patient as practicable.
In order to prevent a fire 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.
Oxygen Tubing Only Connection
1.Thread the cannula fitting onto the oxygen outlet port.
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 briefly illuminate and an audible signal will
sound (the patient alert system) momentarily. After a few seconds, only the
2.Attach the 5/32” (4 mm) I.D. oxygen tubing.
5
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U N PA C K I N G A N D S E T U P
“Power” and “Normal Oxygen” lights will remain on.
NOTE– DeVilbiss recommends for optimal service life that the DeVilbiss
Oxygen Concentrator to be operated for at least 30 minutes after it is
powered on. Shorter periods of operation may affect the long term reliable
operation of the product.
4.Slowly turn the flow meter knob until the flow meter ball is centered on the
line next to the appropriate flow rate.
NOTE–When the flow meter knob is turned clockwise, the flow decreases
(and eventually will shut off the oxygen flow). When the knob is turned
counter-clockwise, the flow increases.
NOTE–Use low output flow meter (part #515LF-607) for flow rates under 1
lpm.
NOTE–The unit may require up to 20 minutes for the oxygen concentration
and flow rate to stabilize. The flow rate should be monitored and
readjusted if necessary.
5.The flow meter has a locking device. If it is necessary to preset and lock in
the prescribed flow rate, tighten the set screw located on the hex nut just
below the control knob using a 1/16" Allen bit. No adjustment can be made
without loosening the set screw.
6.
The DeVilbiss oxygen concentrator is now ready for use.
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6
MAINTENANCE
PATIENT ALERT SYSTEM
ROUTINE PATIENT MAINTENANCE
The DeVilbiss Oxygen Concentrator patient alert system will detect unit
component failure. This system is comprised of both visible and audible alerts
which signal the patient if a malfunction should occur.
DeVilbiss recommends using only original DeVilbiss parts and filters in order to
guarantee a reliable operation of the product.
DeVilbiss OSD® Operation
Cannula, Tubing, and Humidifier Bottle
The OSD is a device within DeVilbiss concentrators that monitors the oxygen
produced by the unit. The OSD operates as follows:
•
Normal Oxygen (green light) - oxygen purity normal
•
Low Oxygen (yellow light) - oxygen purity low–requires servicing
The patient should clean and replace the cannula, tubing, and humidifier bottle
according to the manufacturer’s instructions.
The oxygen patient should perform the following maintenance:
Air Filter and Oxygen Outlet Connector
The air filter and oxygen outlet connector should be cleaned at least once a
week by the patient. To clean, these steps should be followed:
NOTE–If the oxygen purity continues to fall, an audible signal will sound
intermittently. If the oxygen purity continues to fall to a low enough level, the
yellow “Low Oxygen” light will turn off and the red “Service” light will turn on.
1.Remove the air filter located in the door on the back of the unit. Remove
the oxygen outlet connector (if used) from oxygen outlet port.
NOTE–Refer to the Alerts section below for specific alert settings.
2.
NOTE–After Power On, the OSD conducts a continuous diagnostic evaluation to
check for a fault in the piezo electronics. If this condition is detected by the OSD
electronics at any time during concentrator operation, the green “Normal
Oxygen” OSD light will turn off and the beeping audible alert and blinking red
“Service” light will activate. Otherwise for the first fifteen minutes of operation,
the green “Normal Oxygen” light will remain illuminated during the oxygen
stabilization process. After that time, the OSD will begin monitoring the oxygen
purity every second.
3.Rinse thoroughly with warm tap water and towel dry. The filter should be
completely dry before reinstalling.
WARNING
Do not attempt to operate the unit without the air filter or while the filter is
still damp.
NOTE–The air filter should be monitored more closely in environments with
abnormal amounts of dust and lint.
Alerts:
CAUTION–Operation of the DeVilbiss Oxygen Concentrator in extreme
environments or without the air filter will prematurely occlude the intake bacteria
filter and cause a decrease in the unit performance.
There are two visible service alerts located on the front panel.
For serial numbers starting with
J, N or R
Wash in a solution of warm water and dishwashing detergent.
For serial numbers starting with F
Exterior Cabinet
The patient should clean the concentrator exterior cabinet by using a damp cloth
or sponge with a mild household cleaner and wiping it dry.
Low O2%
Service
Low O2%
WARNING
Service
Do not apply liquids directly to the cabinet or utilize any petroleum-based
solvents or cleaning agents.
The audible alert system is internally powered; no batteries are required. If the
indicator lights illuminate or the audible alert sounds other than during start-up,
a problem has occurred
•
Power Failure (Blinking red “Service” light and pulsing audible alert)
•
Low Flow (Below 0.5 lpm) (Continuous red “Service” light and audible
alert)
•
Below Normal Oxygen (84% to 75%, yellow “Low Oxygen” light. 75% to
60%, yellow “Low Oxygen” light and beeping audible alert. Less than 60%,
red “Service” light and beeping audible alert.)
PERIODIC HOMECARE PROVIDER
PREVENTATIVE MAINTENANCE
Use only DeVilbiss concentrator replacement parts and accessories.
Every DeVilbiss Oxygen Concentrator is tested at the factory. To assure
continued trouble-free performance, the following preventative maintenance
should be performed by the homecare provider during periodic oxygen patient
visits. Failure to properly maintain the unit will void the warranty.
The visible and audible alerts will activate for approximately 15 minutes in a no
power situation. If the unit is turned “On” without power or power is removed
later, no alert will sound for the first 10 seconds. After that time, the alert will
produce an audible pulse every few seconds while the visible alert blinks. Power
for this alert is provided by a capacitor on the PC board.
1.Check the oxygen concentration with an oxygen analyzer (part #R217P62
or R218P12)—every 3 years.
a.Calibrate the oxygen analyzer prior to checking the oxygen
concentration. The analyzer should be properly calibrated using the
manufacturer’s recommended procedure.
NOTE–If the concentrator has been unused for an extended period, the unit
must run several minutes before the power fail alert will activate.
NOTE–Changes in temperature, altitude, or humidity may affect the
analyzer’s oxygen concentration reading. The analyzer should be
calibrated in similar conditions to the location of the concentrator.
The PC (printed circuit) board is responsible for controlling the system and
alerts.
NOTE–A high pressure condition is indicated by the audible (a “popping” sound)
release of pressure from a pressure relief valve located on the compressor
head.
b.Power the unit, set the flow meter to 5 LPM and connect the analyzer
to the unit’s oxygen outlet port.
c.Wait 20 minutes for the display to stabilize. The concentrator must
operate for a minimum of 20 minutes before checking the oxygen
concentration.
NOTE–Installation of 515LF-607 low output flow meter package will cause the
low flow alarm not to work.
d.
7
Record the reading.
LT-2023
MAINTENANCE
manufacturer or by a qualified DeVilbiss provider/service technician.
2.Check the audible alert and indicator lights during every service. When the
power switch is turned “On,” listen for the audible alert and check to see if
the front panel indicator lights are operating.
NOTE–If the following described complete processing of the concentrator by a
qualified DeVilbiss provider/technician is not possible, the device must not be
used by another patient!
3.Inspect intake filter (part #MC44D-605) during every PM Check. Replace
as necessary.
DeVilbiss Healthcare recommends that at least the following procedures be
carried out by the manufacturer or a qualified third party between uses by
different patients.
a.Open the filter door and replace filter as required.
4.Inspect the final bacteria filter (part #PV5LD-651) during every compressor
service. Replace as necessary.
NOTE–If preventative maintenance is due at this time, these procedures should
be carried out in addition to the servicing procedures.
a.Use the Cabinet Removal instructions found under CABINET
REMOVAL in this manual to remove and attach the cabinets.
1.Dispose of all accessory components that are not suitable for reuse, i.e.,
particularly the oxygen tubing, the nasal cannula/mask, oxygen outlet
connector and humidifier bottle.
b.Remove the hose from each end of the filter and discard the filter.
c.Install the new final bacteria filter with the “IN” fitting toward the flow
meter.
2.
5.Inspect the compressor filter during every compressor service. Replace as
necessary.
AUTION–the concentrator must be disconnected from the power
C
supply for this step: Open the concentrator and remove all dust deposits
inside the cabinet with an appropriate vacuum cleaner.
3.Clean and disinfect all parts of the cabinet inside and outside and the
power cord with a suitable disinfecting agent, e.g., Microbac Forte,
Terralin®, Aldahol, Cidex OPA or Peract.
NOTE–A change was made to the type of compressor filter used in the 525
series concentrator. The unit may have one of two different types of compressor
filters depending on when the concentrator was manufactured. The original one
is a white plastic filter (part #525D-622) that is located near the compressor. The
newer style is a sintered bronze filter (525DD-626) that is installed in one end of
the compressor exhaust hose near the rotary valve. All models of the 525 series
are now being manufactured with the sintered bronze compressor filter. See
figure below.
4.Check the cord, the plug on the back of the device, the power switch, the
fuse holder and the indicator light for possible damage.
5.
Replace all damaged or worn components.
6.
Replace the cabinet air filter on the back of the device.
7.Check the oxygen concentration. If the device is within specifications, the
intake bacteria filter does not need to be replaced between patients. If the
concentration is not within specifications, the provider should refer to the
service manual section on Troubleshooting.
Sintered Bronze Compressor Filter
(525DD-626)
NOTE–This PM Schedule reflects:
• 5000 hour usage equal to one year
• a normal, clean operating environment.
RETURN AND DISPOSAL
This device may not be disposed of with household waste. After use of the
device, please return the device to the dealer for disposal. This device contains
electrical and/or electronic components that must be recycled per EU Directive
2012/19/EU-Waste Electrical and Electronic Equipment (WEEE). Non-infectious
used accessories (e.g. nasal cannula) can be disposed of as residential waste.
The disposal of infectious accessories (e.g. nasal cannula from an infected user)
must be made via an approved waste disposal company. Names and addresses
can be obtained from the local municipality.
The homecare provider is responsible for:
• determining the condition of the concentrator operating environment.
• determining a preventative maintenance interval frequency* which
takes into consideration the specific operating environment.
* S
tandard intervals are noted below. Service interval may be more
or less frequent than stated below provided that the Home Care
Provider establishes and documents appropriate protocols.
PREVENTATIVE MAINTENANCE SUMMARY
WARRANTY
Patient / Caregiver
DeVilbiss provides warranty for this device. Use only DeVilbiss approved original
spare parts for maintenance and repair to retain warranty. Using unapproved or
non-original spare parts would void warranty.
Clean and replace oxygen tubing, cannula / mask, and humidifier bottle (if used)
according to manufacturer’s instructions.
PROVIDER’S NOTES - Cleaning and
Disinfection When There is a Patient
Change
During each inspection
Homecare Provider
Wash/Replace cabinet filter.
Check audible alert and indicator lights.
During each PM check – every 3 years for the 525 series
When medical devices have already been used with a patient, contamination
with human pathogenic germs should be assumed (unless there is evidence to
the contrary), and the next patient, user or third party should be protected by
appropriate handling and preparation.
Inspect/Replace intake bacteria filter as necessary.
Check oxygen purity.
During compressor service
Inspect/ Replace final bacteria filter.
Inspect/ Replace the compressor filter
Therefore, when there is a patient change, people must be protected during the
transport and handling of the device, and the device must be fully processed,
i.e., cleaned and disinfected, by suitably trained personnel before reuse to
protect the next patient. The complete processing may only be done by the
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8
TROUBLESHOOTING
SYSTEM OPERATION
NORMAL OPERATING SEQUENCE
The DeVilbiss Oxygen Concentrator uses a pressure swing adsorption system.
The air is drawn into the unit through air filters and into a double-head
compressor.
When the concentrator is turned “On,” the following cycling sequence can be
observed by attaching a pressure gauge to the manifold or accumulator tank test
point.
1.The rotary valve is quickly cycled several times to relieve residual bed
pressure preventing a static condition in the compressor. This rapid cycling
only happens on start-up and is clearly heard as pressure is being quickly
exhausted several times. The pressure exhausts through an exhaust
muffler that is connected to the valve.
2.The PC board applies a short DC voltage signal to the valve. The valve will
stop for several seconds causing the right bed to pressurize first while the
left bed depressurizes.
3.Voltage is again applied to the valve for a short time. The valve will stop for
approximately a second. During this time the sieve bed pressures are
equalized.
4.A short DC voltage signal is again applied to the valve. The valve will stop
for several seconds causing the left bed to pressurize while the right bed
depressurizes.
5.A short DC voltage signal is again applied to the valve. The valve will stop
for approximately a second. During this time, the sieve bed pressures are
equalized.
6. The cycle then repeats with step 2.
A pneumatic diagram of the system is shown on Page 36.
The compressed air passes through a rotary valve, which is cycled at a predetermined rate, and is directed into one of two sieve beds. The sieve beds
contain molecular sieve material which is a synthetically-produced inorganic
silicate. It is very porous and has the unique ability to selectively adsorb nitrogen
from the air as it passes through the sieve bed.
As one bed is being pressurized, the other bed is quickly depressurized. This
allows the nitrogen that was adsorbed during its pressurization cycle to be
exhausted from the sieve material.
The nitrogen is released through exhaust ports located on the rotary valve
assembly. The ports are connected to a single piece of hose running from the
valve to the exhaust muffler.
Also during each bed pressurization, a small amount of oxygen flows through an
orifice from the pressurized bed into the depressurizing bed. This helps purge the
nitrogen from the depressurizing bed.
The beds will continue to be alternately pressurized and depressurized as the
unit operates.
NOTE–In the “turn-down” mode, the fixed cycle time is decreased to less than 2
seconds.
Oxygen leaving the sieve beds is directed through a check valve to the
accumulator tank. A pressure regulator on the tank controls the oxygen pressure
as it leaves the accumulator and enters the flow meter. The flow meter allows the
oxygen flow to be controlled and adjusted to the level prescribed by the patient’s
physician. From the flow meter the oxygen passes through the final bacteria filter
and finally the oxygen outlet port to the patient.
The DeVilbiss Oxygen Concentrator operates on a timed cycle (3.6 sec. @
5LPM) that is controlled by the PC board. The PC board will send voltage to the
valve causing it to shift and alternately pressurize the sieve beds.
The PC board also activates the electronic alert system. Low flow, system
abnormality, and power failure are indicated by audible and visible alerts. A high
pressure condition will be indicated with a “popping” type sound produced by
release of pressure from a pressure relief valve on the compressor head.
The 525 operating system incorporates “turn-down” technology. The PC board
constantly monitors the flow rate and will decrease the cycle time whenever the
flow rate is less than 1.2 LPM. Therefore it “turns-down” the cycle based on lower
oxygen demand. As a result, the unit runs cooler and less power is consumed.
9
LT-2023
TROUBLESHOOTING
Type II—Operation Issues (Service Indicator
SIMPLIFIED TROUBLESHOOTING
Light and/or an audible alert is activated or the
Pressure Relief Valve releases pressure with a
‘popping’ sound)
The key to simple troubleshooting is to recognize which type of problem exists
and select the most effective approach to solving the problem. The different
types of problems and the approaches for solutions are as follows:
WARNING
Type I— Purity Issues (Low Purity Indicator Light
and/or an audible alert is activated or the Pressure
Relief Valve releases pressure with a ‘popping’ sound).
Electric Shock Hazard. Extra care should be taken if it is necessary to
operate the unit with the cabinet removed.
WARNING
WARNING
Mechanical Hazard. Keep fingers, loose clothing, etc. away when working
on compressor.
NOTE–Check for leaks using a certified leak detection solution such as Snoop®
or equivalent (must not contain ethylene glycol). Apply leak test solution to all
fittings and hose connections with unit running. If an air leak is present, the
solution will bubble. All leaks should be repaired before putting the unit back in
service.
CAUTION–Do not apply leak test solution to any part of the rotary valve or the
main PC Board assembly.
Electric Shock Hazard. Extra care should be taken if it is necessary to
operate the unit with the cabinet removed.
WARNING
Mechanical Hazard. Keep fingers, loose clothing, etc. away when working
on compressor.
Observe the pressure cycle at the oxygen tank.
1.Connect a calibrated pressure gauge to the unit’s oxygen tank test point or
manifold.
2. Set the unit’s flow meter to 5 LPM.
3.Power the unit and allow it to operate for a minimum of 5 minutes before
observing the pressure cycle.
4.Compare the high pressures and low pressures to those expected for the
current elevation and use the following chart to find the appropriate action.
All consecutive high pressures should be within 1 psi of each other and all
consecutive low pressures should be within 1 psi of each other.
Operation Alarm Chart
If this is happening
It’s because of this
Pressure relief valve has a
‘popping’ noise with
Rotary valve not cycling
possible uneven tank
properly.
pressure.
Continuous red light with a
Low flow alert – flow setting
pulsing audible alert while
below 0.5 lpm.
compressor is operating.
NOTE–For normal system pressures refer to Specifications.
NOTE–Check for leaks using a certified leak detection solution such as Snoop®
or equivalent (must not contain ethylene glycol). Apply leak test solution to all
fittings and hose connections with unit running. If an air leak is present, the
solution will bubble. All leaks should be repaired before putting the unit back in
service.
Continuous red light with a
Internal temperature is too
continuous audible alert
high.
and unit is warm to touch.
CAUTION–Do not apply leak test solution to any part of the rotary valve or the
main PC Board assembly.
Pressure Diagnostic Chart
If Pressure Reading Is
Do This
To This
Higher than expected and/
or pressure relief valve
Replace
Sieve beds (2)
has a ‘popping’ noise
Inspect and replace, as
Filters
needed
Inspect and correct or replace,
Tubing connections
Lower than expected
as needed
Compressor
Troubleshoot
See Component Testing,
Repair and Replacement
Inspect and correct, as
Leaks from sieve beds to
As expected
needed
oxygen outlet port
Dropping too low during
Replace
Check valves or manifold
cycle change
Inspect and replace, as
Rotary valve wire harness
Uneven - high pressures needed
& low pressures are not
Rotary valve or PC board.
consistent during cycle
Troubleshoot or replace
See Component Testing,
Repair and Replacement
Continuous red light with a
pulsing audible alert and Internal power failure to
fan is operating but
compressor.
compressor is not.
Do this to resolve
Test rotary valve. Refer to
page 21.
Correct setting and educate
user and / or install low flow
meter, if prescription is
below 1 lpm. See section on
the flow meter.
Move unit to cooler location.
Ensure unit vents are clear.
Ensure unit filters are clean.
Ensure cooling fan is
operating, replace as
needed.
Ensure there is proper
voltage to the unit. If voltage
is correct, replace capacitor
or compressor.
Test voltage at compressor
connector. If no voltage,
replace main wire harness. If
voltage present, replace
capacitor or compressor.
Ensure voltage is correct
and / or the part is functional
for the following: AC outlet,
power cord, IEC connector
or cord connection, main
wire harness, circuit breaker;
correct as needed. If issue
persists, replace power
switch.
Blinking red light with a
pulsing audible alert and
compressor and fan not
operating.
External OR Internal power
failure.
Blinking red light with a
pulsing audible alert and
compressor and fan are
operating. Pressure relief
valve has a ‘popping’
noise.
Inspect wire harness and
Internal power failure at valve replace as needed.
wire harness or PC board.
Inspect fuse, if blown,
replace fuse or PC board.
Type III—The concentrator runs and
continues to cycle but has low oxygen
concentrations and no alarms are
activated.
This problem is similar to Type I in the way it is diagnosed. Observe pressure
cycle at oxygen tank as recommended in Type I.
LT-2023
10
TROUBLESHOOTING
TROUBLESHOOTING CHART A
Visible Alarm
Audible Alarm
Compressor
Power Light
OFF
OFF
ON
ON
OTHER SYMPTOMS
POSSIBLE CAUSE
POSSIBLE REMEDY
Pulsating air noise
Intake filter not in place or defective
Check filter and replace if necessary
Excessive noise
Fluctuating oxygen flow
Little or no oxygen flow
Low oxygen concentration
Audible alarm does not sound during power
failure
Compressor intake hose disconnected
Reconnect hose
Loose or defective motor mounts
Replace motor mounts
Defective compressor
Replace compressor
Defective cooling fan
Replace cooling fan
Occluded humidifier
Clean or replace humidifier
Use of improper humidifier
Use only a bubble-type humidifier
Occluded filters
Clean or replace filters
Occluded or defective cannula and tubing
Detach cannula from oxygen delivery tubing. If proper flow is not
attained, check tubing for kinks or other obstructions. Clean or straighten
as required or replace tubing if necessary
Use of excess oxygen tubing
The unit is designed to deliver 5 lpm with a cannula on 50 feet (15
meters) of approximately 5/32” (4 mm) inside diameter tubing. Smaller
diameter tubing or the addition of any other flow restriction may prevent
obtaining the desired flow rate.
Defective flow meter
Replace flow meter
Leak in system
Check for leaks in all hoses and fittings
Defective compressor
Replace compressor
Defective compressor reed valve
Replace compressor reed valve
Defective check valve
Replace check valve or manifold
Pressure regulator not adjusted properly or defective
Adjust or replace pressure regulator
Flow meter not adjusted properly
Adjust flow meter
Hose disconnected to flow meter
Reconnect hose
Oxygen delivery tubing is kinked or blocked
Straighten tubing or remove obstruction
Occluded humidifier
Clean or replace humidifier
Leak in system
Check for leaks in all hoses and fittings
Defective sieve bed check valve
Replace check valve or manifold
Defective compressor reed valve
Replace compressor reed valve
Defective compressor
Replace compressor
Rotary valve not operating correctly
Replace valve
Occluded filters
Clean or replace filters
Contaminated sieve beds
Replace sieve beds
Unit has not been used for an extended period of time.
NOTE–If the concentrator has been unused for an
extended period, the unit must run several minutes before
the power fail alarm will activate.
Allow unit to run for 20 minutes and retry
Defective PC board
Replace PC board
Defective power switch
Replace power switch
Defective wire harness
Replace wire harness
Audible alarm does not sound when unit is
turned “On”
Defective PC board
Replace PC board
Pressure relief valve activated “popping” sound
PC board connectors not properly latched
Be sure tabs are pushed completely into place
Defective PC board
Replace PC board
Defective rotary valve
Replace valve
PC board connectors not properly latched
Be sure tabs are pushed completely into place
Defective PC board
Replace PC board
Defective light panel
Replace light panel
Service Required light does not illuminate when
unit is turned “On”
11
LT-2023
TROUBLESHOOTING
TROUBLESHOOTING CHART B
Visible Alarm
Audible Alarm
Blinking
Pulsing
Compressor
Power Light
OFF
OFF
OTHER SYMPTOMS
POSSIBLE CAUSE
POSSIBLE REMEDY
Fan off
Line cord not properly installed or defective
Insert plug in receptacle or replace line cord. On 220/230/240
Volt units, check that the IEC connector on the back of the unit is
attached.
No power at receptacle
Check building circuit breaker or fuse, or have house wiring
checked by qualified electrician Circuit may be fully loaded with
other appliances and another receptacle may be required. Wall
outlet should be independent of other appliances
Oxygen concentrator circuit breaker activated
Press the circuit breaker reset button. If unit circuit breaker opens again,
check internal wiring.
Line cord quick-connect terminal inside unit is
disconnected
Reconnect quick-connect terminal
Defective power switch
Replace power switch
Defective circuit breaker
Replace circuit breaker
TROUBLESHOOTING CHART C
Visible Alarm
Audible Alarm
Compressor
Power Light
Blinking
Pulsing
ON
ON/OFF
OTHER SYMPTOMS
POSSIBLE CAUSE
POSSIBLE REMEDY
Fan and compressor operating
Pressure relief valve activated – “popping”
sound
Connector on PC board not connected
Connect connector
Blown fuse on PC board
Replace fuse
Defective PC board
Replace PC board
TROUBLESHOOTING CHART D
Visible Alarm
Audible Alarm
Compressor
Power Light
OFF
ON
ON
ON
OTHER SYMPTOMS
POSSIBLE CAUSE
POSSIBLE REMEDY
Fan operating
Main wiring harness disconnected/defective
Reconnect/replace wiring harness
Loose compressor wire
Tighten or attach wire
Defective capacitor
Replace capacitor
Defective compressor
Compressor overheated due to:
Replace compressor
1. Occluded filters
1. Clean or replace filters
Defective cooling fan
Replace cooling fan
Defective compressor
Replace compressor
Unit warm to the touch and cannot be
restarted for several minutes
2. Restricted input or output air passage
3. Low or high line voltage
LT-2023
2. Remove obstruction
3. Check line voltage; use alternate circuit independent of other
appliances
12
TROUBLESHOOTING
TROUBLESHOOTING CHART E
Visible Alarm
Audible Alarm
ON
ON
OTHER SYMPTOMS
POSSIBLE CAUSE
Fluctuating or no flow
System pressure below 9 psi (62.1 kPa) due to:
Compressor
Power Light
ON
ON
POSSIBLE REMEDY
1. Leak in system
1. Check for leaks in all hoses and fittings
2. Defective compressor
2. Replace compressor
TROUBLESHOOTING CHART F
Visible Alarm
Audible Alarm
Compressor
Power Light
See Below
See Below
ON
ON
OTHER SYMPTOMS
POSSIBLE CAUSE
POSSIBLE REMEDY
No OSD lights are illuminated.
Defective OSD.
Check concentration with an oxygen analyzer. If the concentration is
within specification, replace the PC board.
No OSD lights are illuminated, but red
“Service Required” light is illuminated
accompanied by a beeping audible alarm
Oxygen level is low*
Check concentration with an oxygen analyzer. If the concentration is
within specification, replace the PC board. If the concentration is low,
refer to low oxygen concentration symptom in Troubleshooting Chart A.
Both OSD lights are illuminated.
Defective OSD
Replace PC board.
Yellow Low Oxygen light is illuminated.
Oxygen level is low*
Check concentration with an oxygen analyzer. If the concentration is
within specification, replace the PC board. If the concentration is low,
refer to low oxygen concentration symptom in Troubleshooting Chart A.
Yellow Low Oxygen light is illuminated and
an intermittent audible alarm sounds every
few seconds.
Oxygen level is low*
Check concentration with an oxygen analyzer. If the concentration is
within specification, replace the PC board. If the concentration is low,
refer to low oxygen concentration symptom in Troubleshooting Chart A.
*Refer to Alerts page for oxygen purity levels.
NOTE-If unit does not run or perform to specification, verify the proper AC input voltage and frequency are being used.
13
LT-2023
C O M P O N E N T T E S T I N G , R E PA I R A N D R E P L A C E M E N T
PROPER REPAIR PROCEDURES
CABINET REMOVAL
WARNING
For units with Serial Numbers starting with J,
N or R
When servicing the DeVilbiss Oxygen Concentrator, be absolutely certain
that the correct tools are used and that the parts are free of oil and grease
or any material not compatible with oxygen. Teflon® tape is recommended
and must be applied to the male threads omitting the first thread to
eliminate the possibility of tape particles entering the oxygen system.
To remove back cabinet:
The majority of all the servicing and repairs can be done without removing the
front cabinet completely. However, it may be loosened or removed to gain access
to the components behind it.
1. Unplug the unit from the wall outlet.
2. Remove the six screws that secure the back cabinet – 2 behind handle, 2
near the bottom, and 1 on each side.
Electric shock hazard. Do not remove cabinet. The cabinet should only be
removed by a qualified 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.
NOTE–All six screws are the same size.
NOTE–Be sure to read all of the steps involved before beginning any of the
procedures in this manual.
3. Remove the back cabinet by sliding it toward the rear until clear.
4. To reassemble, reverse steps 2-3.
NOTE– After repairing or replacing a component, run the unit for 20 minutes,
check the oxygen concentration and test for leaks.
To loosen the front cabinet:
5. Remove the two screws (located directly above the hour meter) that hold
the front cabinet to the unit’s internal structure.
6. Remove the screw located near the bottom of the recessed humidifier
compartment on the front of the unit. The top of the front cabinet can now
be tilted forward to allow access to the components behind it.
The DeVilbiss Oxygen Concentrator is designed for ease of service. To aid
service personnel a Service Kit (part #444-501) is available which contains the
necessary gauges, tools, and testing instruments to properly service the oxygen
concentrator. See list below.
In addition, you will also need an oxygen analyzer (part #R217P62 or R218P12)
to periodically check oxygen concentration levels and leak test solution.
To remove the front cabinet completely:
7. Tilt cabinet forward and disconnect the ribbon connector from the PC
board.
8. Before disconnecting the wires from the power switch and circuit breaker
note their positions in order to reconnect them properly; then disconnect
the wires.
9. Disconnect the hose at the bottom of the flow meter and remove cabinet.
10. To reassemble reverse steps 5 – 9 making sure bottom of cabinet is
inserted securely in base of unit.
WARNING
A certified leak detection solution, such as SWAGELOK #MS-Snoop® or
equivalent, is needed to test for system leaks. The solution must not
contain ethylene glycol.
CAUTION–Do not apply leak test solution to any part of the rotary valve or the
main PC Board assembly.
NOTE–Apply leak test solution to all fittings and hose connections with the unit
running. If an air leak is present, the solution will bubble. All leaks should be
repaired before putting the concentrator back in service.
NOTE–All 525 models are now being built using Plastite cabinet screws. These
are special thread forming screws; so do not over tighten. They should be
torqued to 18 – 20 in-lbs. The original cabinet screw has much finer threads and
is not a thread forming screw.
The following parts are included in the Service Kit:
1
1
1
1
1
1
2
1
2
1
1
1
1
1
1
LT-2023
Slotted bit
#1 Phillips bit
#2 Phillips bit
Crescent wrench
8” Duckbill pliers
Voltmeter
Pressure/Vacuum gauge
Tool box
Test Fittings
Torx screwdriver w/bits
Channel Lock Pliers
1/4” Ratchet wrench
10mm Socket l/4” Drive
1/4” Drive extension
Plastic storage case
These screws are not interchangeable, so be sure to order the correct part
number. See figure below.
Plastite Cabinet
Screw
Original Cabinet
Screw (525DD-628)
For units with Serial Numbers starting with F
To remove front and back cabinets:
1. Ensure the unit is unplugged from the wall outlet.
2. Remove the six screws that secure the back cabinet – 2 behind handle, 2
near the bottom, and 1 on each side.
NOTE–All six screws are the same size.
3. Remove the back cabinet by sliding it toward the rear until clear.
4. Remove the front cabinet by pushing the top shoulders toward the back of
the unit, then outward away from behind the bib. Tilt the top of the front
cabinet forward until it can be pulled out of the base of the unit.
5. To reassemble, reverse steps 2-4.
The majority of all the servicing and repairs can be done without removing the
front bib. However, it may be loosened or removed to gain access to the
components behind it.
14
C O M P O N E N T T E S T I N G , R E PA I R A N D R E P L A C E M E N T
To loosen the bib:
ee Figures below showing pressures being checked at accumulator tank "T"
S
fitting and manifold.
6. Remove the two screws (located directly above the hour meter) that hold
the bib to the unit’s internal structure. The bib can now be tilted forward to
allow access to the components behind it.
To remove the bib completely:
7. Disconnect the ribbon connector from the PC board.
8. Before disconnecting the wires from the power switch and circuit breaker
note their positions in order to reconnect them properly; then disconnect
the wires.
9. Tilt the top of the bib forward to release it from the slot in the body of the
concentrator.
10. Disconnect the hose at the bottom of the flow meter and remove bib.
11. To reassemble reverse steps 6 – 10 making sure bottom of front cabinet is
inserted securely in base of unit.
Accumulator "T" Fitting
5.Turn the unit “On” with the flow rate set to maximum recommended flow,
which is usually 5 lpm. Allow the unit to run for 5 minutes before observing
the pressures. During each timed cycle, the average pressure in the
oxygen accumulator will rise and fall. The high pressures should be
consistent and the low pressures should be consistent.
NOTE–The bib tab must be inserted into the slot above the rotary valve before
securing bib.
NOTE–All 525 models are now being built using Plastite cabinet screws. These
are special thread forming screws; so do not over tighten. They should be
torqued to 18 – 20 in-lbs. The original cabinet screw has much finer threads and
is not a thread forming screw.
NOTE–Pressure drop will be 4-5 psi each cycle.
NOTE–Expected normal pressures observed depend on altitude and flow rate.
See the Expected Accumulator Tank Pressure Range chart below.
•
Increases in altitude and flow rate will slightly decrease accumulator
pressures.
•
Lower altitudes and flow rates will slightly increase accumulator pressures.
These screws are not interchangeable, so be sure to order the correct part
number. See figure below.
Plastite Cabinet
Screw
Manifold
NOTE–A defective check valve, in either the purge harness or the manifold, may
cause a rapid drop in accumulator pressure below the minimum value.
Original Cabinet
Screw (525DD-628)
EXPECTED ACCUMULATOR TANK PRESSURE RANGE @ 5LPM
Altitude
Psi
kPa
ACCUMULATOR PRESSURE TEST
0 to 457 m
0 to 1500 ft.
23-32
159-221
To check accumulator pressures:
457 to 914 m
1500 to 3000 ft.
21-29
145-200
914 to 1524 m
3000 to 5000 ft.
20-27
138-186
1. Make sure the unit is “Off.”
2.Use the Cabinet Removal instructions listed previously to open the unit for
testing.
3.Use the pressure gauge (part #PVO2D-601) and pressure test assembly
(part #303DZ-637) included in the Service Kit.
Includes a pressure drop of 4-5 psi and 27-34 kPa during the pressure cycle.
6. Refer to the Type 1 – Purity Issues, found under Simplified Troubleshooting,
to determine the appropriate action to take in resolving abnormal pressure
cycles.
NOTE–A defective compressor will be indicated by slowly rising pressure.
Pressure may only reach a certain level and then stop.
Pressure Gauge
Low oxygen concentration levels and accumulator pressures higher than normal
may indicate defective sieve beds. Severely contaminated beds may also cause
the pressure relief valve on the compressor to open.
Pressure Test
Assembly
NOTE–A malfunctioning rotary valve may also cause high accumulator tank
pressure and activation of the pressure relief valve. In this case it should be
determined whether the problem is with the sieve beds, valve, or both.
4.Remove the tubing cap from the accumulator tank fitting or from the
manifold attached to the tank, and attach the 1/16" (1.6 mm) diameter
tubing from the gauge to the accumulator tank fitting just vacated above.
15
LT-2023
C O M P O N E N T T E S T I N G , R E PA I R A N D R E P L A C E M E N T
7. Install the new capacitor and secure with a new cable tie.
8. Replace the compressor and reassemble cabinet.
9.Replace the back cabinet and secure with the six screws.
AUXILIARY OXYGEN PORT
All 525 series concentrators are now being manufactured with an auxiliary
oxygen port located on the back of the unit. Concentrators with the auxiliary port
have serial numbers starting with “N” or “R”.
CHECK VALVES/MANIFOLD
To fill oxygen cylinders:
This external port can be used to fill oxygen cylinders with an FDA-cleared
cylinder filling device that is designed to use oxygen from a concentrator to fill a
cylinder. The port is only for use with FDA-cleared filling devices with compatible
oxygen input specifications.The flow meter should be set at 3 LPM or less when
the concentrator is being used during cylinder fill. The port does not affect
concentrator performance if properly used. See figures below.
Auxiliary Port Output Specifications:
Outlet Pressure ................................... 8.5±0.5 psi
Outlet Flow....................................... 2.5±0.5 LPM
Outlet Oxygen...............................................>90%
Operation Time ....................................Continuous
Refer to the cylinder filling device instruction guide for the oxygent input/output
specifications, connection and operating instructions.
Manifold And Sieve Bed Check Valves
The manifold check valves, located in the manifold attached to the accumulator
tank, and the sieve bed check valves, located in the purge harness, between the
outlet of each sieve bed and the accumulator tank, allow oxygen to pass from the
sieve beds to the accumulator tank, when the bed pressure is greater than the
accumulator tank pressure. These valves also prevent reverse flow of oxygen
from the accumulator tank to the sieve beds.
The manifold also directs a small amount of pressurized oxygen into the
discharging sieve bed to aid the nitrogen exhaust process. The purge harness
includes a fixed orifice that performs the same function.
A defective manifold or sieve bed check valve will result in lower oxygen
concentrations and accumulator pressures.
Use the Accumulator Pressure Test described in this section to troubleshoot
manifold or sieve bed check valves.
•
To replace a defective sieve bed check valve, remove the tubing on either
side of it and install a new valve making sure the outlet end is toward the
accumulator tank.
•
To replace a defective manifold check valve, replace the manifold.
NOTE– Also see manifold section on page 19.
Final Check Valve
Transfill Hose
(PF1100TUB)
Auxiliary Port
The final check valve is located, on older units, between the final bacteria filter
and the oxygen outlet fitting.
Transfiller Caddy
(525DD-650)
To replace the final check valve:
1. Make sure the unit is unplugged from the wall outlet.
2. Use the Cabinet Removal instructions listed previously to open the unit.
3. Remove the hose from the outlet side of the final bacteria filter.
4. Remove the two screws from the back of the oxygen outlet fitting assembly
and remove the assembly.
5. Remove the hose from each end of the final check valve.
6. Attach the hoses to a new check valve. Make sure that the flat side of the
check valve is directed toward the oxygen outlet fitting.
7. Replace the outlet fitting assembly and connect the hose to the filter.
8. Reassemble the cabinet.
CAPACITOR
The capacitor enables the compressor to start and run by supplying voltage to
the windings of the compressor motor. A defective capacitor will result in the
compressor running slower or not starting.
CAUTION–The 525DS concentrators use a GSE compressor with a 22 mfd
capacitor. If replacement is necessary, be sure the correct capacitor is installed.
CAUTION–The 525KS/525PS concentrators use a GSE compressor with a 10
mfd capacitor. If replacement is necessary, be sure the correct capacitor is
installed.
WARNING
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.
COMPRESSOR
The DeVilbiss Oxygen Concentrator uses a double-head, oil-free compressor.
The compressor is secured to the base with four motor mounts.
If a defective capacitor is suspected, a new one must be installed. The capacitor
is strapped into a well molded into the bottom of the unit next to the cooling fan.
Pressure Relief Valve
Intake Fitting
To replace the capacitor:
1. Make sure the unit is unplugged from the wall outlet.
2.Remove the back cabinet. Use the Cabinet Removal instructions listed
previously.
3.Remove the compressor. Use the To Remove the Compressor instructions
listed under Compressor.
4.Disconnect the two wires from the terminals on the capacitor.
5.Cut the nylon cable tie holding the capacitor in place and remove the
capacitor.
6. Reconnect the wires to the new capacitor.
Exhaust Fitting
Electrical Connector
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16
C O M P O N E N T T E S T I N G , R E PA I R A N D R E P L A C E M E N T
A compressor that is worn or defective may:
•
cause pressure to rise slowly.
•
cause excessive noise and/or vibration.
•
cause lower oxygen concentrations.
To test the compressor operating voltage:
The compressor requires line voltage to operate. If the compressor does not start
when the unit is turned on, the voltage input must be tested:
1.This voltage can be checked at the compressor connector using a
voltmeter or test light connected to the brown and blue wires. The voltmeter
is the best way to test.
A worn or defective compressor can be caused by a defective internal
component such as:
•
reed valve
•
o-ring
•
gasket
•
cup seal
Voltmeter Leads
These components are included in the Compressor Rebuild Kit (525D-643 and
525K-643).
Cup Seal
Rod Screw
Spacer
Rod (beneath
cup retainer)
Sleeve
Cup
Retainer
Testing Compressor Voltage
2.If no voltage is detected, disconnect power and check for loose or broken
wires between the compressor connector and switch or wire harness.
3.If there is voltage at the compressor connector, then either the capacitor or
the compressor itself is defective.
To test the compressor for proper output:
Valve Plate
NOTE–If the compressor is not providing a high enough output the patient alert
system may be activated.
Retainer
1. Use the Cabinet Removal instructions listed previously to open the unit for
testing.
2. Use the Accumulator Pressure Test listed previously to observe the high
pressures, low pressures and the pressure drop.
3. Refer to the Type 1 – Purity Issues, found under Simplified Troubleshooting,
to determine the appropriate action to take in resolving abnormal pressure
cycles.
O-Ring
Reed
Valve or
Flapper
Screw
Sleeve
PR Valve
Exhaust
Fitting
NOTE–A compressor, which slowly builds pressure that remains below 25 psi,
indicates worn cup seals and/ or reed valves.
If these conditions are observed then:
Compressor
Head
Head
Gasket
Connecting
Tubes
•The unit filter(s) may be occluded—check the air filter, compressor filter,
and intake filter for occlusions.
•There may be a severe leak in the system—check for air leaks using a leak
detection solution such as Snoop® or equivalent (must not contain ethylene
glycol).
Intake
Fitting
CAUTION–Do not apply leak test solution to any part of the rotary valve or the
main PC Board assembly.
•The compressor reed valves, cup seal, or the compressor itself may be
defective.
If the filters are not occluded and no leaks are found, the compressor must then
be removed and repaired or replaced.
NOTE–A built-in thermal cutoff switch will shut the compressor off if it becomes
overheated. This protects the compressor from damage caused by heat build-up.
(Some models have an auxiliary thermostat mounted within the compressor
compartment.) Should this condition occur, the compressor will require several
minutes for the thermo-protective device to reset.
NOTE–A pressure relief (PR) valve is located on the pressure head to prevent
high pressure build up in the system should a component malfunction occur.
To remove the compressor:
1. Make sure the unit is unplugged from the wall outlet.
2. Use the Cabinet Removal instructions listed previously to open the unit.
3.Disconnect the compressor wires by disconnecting the compressor
electrical connector.
4.Remove the ladder clamp and hose from the exhaust fittings on the
compressor head and compressor filter if applicable.
5.Carefully place the concentrator on its front side. From the bottom of the
unit, remove the four 10 mm hex nuts that secure the motor mounts.
17
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C O M P O N E N T T E S T I N G , R E PA I R A N D R E P L A C E M E N T
5.Secure motor mounts with hex nuts.
6. Reconnect hoses to the fittings at compressor exhaust and filter.
7. Reconnect the compressor electrical connector.
6.Lift compressor partially out of the compressor housing area and loosen
ladder clamp securing hose to the intake fitting, then remove hose.
7.Compressor may now be removed from the compressor housing area.
CAUTION–If the unit has been running recently, the compressor may be hot.
COOLING FAN
8.Unscrew motor mounts from compressor feet by hand.
The cooling fan provides a constant air flow to cool the compressor. The cooling
fan is located in the bottom of the unit below the compressor.
To inspect and/or replace internal
components:
A defective cooling fan may cause the compressor’s internal thermo-protective
(thermal cut off) device to activate and shut the compressor off. Should this
condition occur, the compressor will require several minutes for the thermoprotective device to reset.
1.Remove the eight screws that hold the compressor heads in place. When
removing the heads, be sure to keep each head and its components with
the correct compressor side.
2.Check for proper placement of or damage to the gaskets on the bottom of
the compressor heads. Replace if damaged.
3.Remove reed valve plates. A reed valve is located on each side of the
valve plate.
4.The compressor reed valves should be flush with the valve plate. If the
valve is broken or not flush with the valve plate, or foreign matter is
detected inside the head, clean or replace the compressor reed valves.
If the cooling fan is defective, it must be
replaced:
1. Make sure the unit is unplugged from the wall outlet.
2. Use the Cabinet Removal instructions listed previously to open the unit.
3. Use the To Remove the Compressor instructions listed under Compressor.
4. Disconnect the cooling fan terminals.
5.Note the position of the fan and fan guard before removing the four
retaining screws that secure the fan to the base of the unit.
6.Remove the defective fan and secure the replacement fan in position with
the four retaining screws.
To replace the compressor reed valves:
a.Remove the screw holding the compressor reed valves in position on
the valve plate and discard the used reed valves.
b.Position the new reed valves so that they are centered and completely
cover the holes in the valve plate.
c.Place the metal retainer on the reed valves and secure with the reed
valve screw.
5.Check for proper placement of or damage to the rubber o-ring on the
bottom of the valve plate. Replace if damaged.
6.Remove piston sleeves by pulling upward and inspect cup seal on pistons.
Replace if badly worn or damaged.
NOTE–When installing the fan, be sure the air flow directional arrow on the side
of the fan is directed away from the compressor and fan guard is reinstalled
properly.
7.
8.
FLOW METER
To replace cup seal:
There are two flow meters available for the DeVilbiss 525 series oxygen
concentrators: a standard 5 lpm flow meter (505DZ-607) and a low output flow
meter (515LF-607). The low output flow meter should be used when the
prescribed flow rate is at or under 1 lpm.
a. Remove rod screw from top of piston.
b. Remove the cup retainer plate.
c. Discard defective cup seal.
d. Place new cup seal into position.
e. Replace cup retainer plate.
f. Secure with screws.
7.Discard old sleeve and position new sleeve at 45 degree angle over the
piston. Carefully push it down as you rotate it slightly around the top of the
piston until it is in place.
8.Place valve plates on the compressor so that heads of reed valve screws
are aligned with the indentation in top of pistons.
9.Install the compressor heads so that the holes in the heads are aligned
with the holes in the compressor housing.
10. Secure compressor heads with the screws.
NOTE–Installation of a low output flow meter eliminates the low flow alert for flow
delivery under 0.5 lpm.
Both pressure-compensated flow meters have an accuracy
level of ±5% at full scale (exception: +0% / -5% at 5 lpm)
and are designed for use at 8.5 psi (58.6 kPa). Both flow
meters can be locked using a 1/16th inch Allen wrench and
tightening the locking screw behind the flow meter knob.
Locking Screw
To check for leaks in the flow meter tubing:
1.Check for leaks using a certified leak detection solution such as Snoop® or
equivalent (must not contain ethylene glycol).
2.Apply leak test solution to all fittings and hose connections with the unit
running.
To replace the compressor:
CAUTION–The 525DS concentrators use a GSE compressor with a 22 mfd
capacitor. The 525KS/525PS concentrators use a GSE compressor with a 10 mfd
capacitor. If replacement is necessary, be sure the correct capacitor is installed.
CAUTION–Do not apply leak test solution to any part of the rotary valve or the
main PC Board assembly.
1.Inspect the motor mounts. Replace if damaged. Attach mounts to
compressor feet.
2.Inspect the capacitor to determine if replacement is necessary. If capacitor
is wrong value for compressor or replacement is desired, refer to Capacitor
section.
3. Reconnect hose to the compressor intake fitting.
4.Position compressor on the base of the unit so that the studs on the motor
mounts protrude through the holes in the base of the unit.
LT-2023
Reconnect the electrical connector.
Reinstall the compressor.
3.
If an air leak is present, the solution will bubble. All leaks should be
repaired before putting the concentrator back in service.
WARNING
Electric Shock Hazard. Use caution when leak testing near electrical
connections.
18
C O M P O N E N T T E S T I N G , R E PA I R A N D R E P L A C E M E N T
6.
To replace the flow meter:
1. Make sure the unit is unplugged from the wall outlet.
2.Use the Cabinet Removal instructions listed previously to open the unit.
3. From behind the bib/front cabinet, remove the 2 hoses from the flow meter.
4.While squeezing tabs on flow meter brackets, push the flow meter through
the bib/front cabinet or just unscrew flow meter fittings.
5. Install new flow meter and reconnect hoses.
Replace the flow meter.
a. Remove all tubing from the current flow meter.
b. Unscrew white plastic connectors or fittings.
To install or replace the low output flow
meter:
1.
2.
3.
Ensure that the unit is unplugged from the wall outlet.
Use the Cabinet Removal instructions listed previously to open the unit.
Disconnect:
a. All wires, terminals and connectors attached to the PC board.
b.The 1/8 ID blue tubing from the Oxygen Sensing Device (OSD) and
from the flow meter.
c. The screw that secures the PC board to the unit.
4.Build the T-fitting assembly. (Skip this step, if replacing an existing low
output flow meter.)
a.Cut the existing 1/8 inch blue tubing that connected the OSD and the
flow meter into two equal pieces.
7.
c.Remove the metal brackets and push the meter through the case.
Save the meter and metal brackets for later use, if desired.
d.Align the new metal brackets on the flat surfaces of the new meter.
e. Push the flow meter into the case with the highest flow at the top.
Reassemble the unit.
a.Connect one end of the 1/8 inch blue tubing to the T-fitting assembly
to the bottom of the flow meter and the other end to the bottom of the
OSD.
b.Reconnect the PC board wires, tubing, terminals and connectors.
HOUR METER
To replace the hour meter:
5.
1. Make sure the unit is unplugged from the wall outlet.
2.Use the Cabinet Removal instructions listed previously to open the unit.
3. Remove PC board.
4.Squeeze locking tabs on both sides of hour meter while pushing upward to
remove meter.
5.Install a new hour meter by applying downward pressure until it snaps into
position.
6. Replace PC board and reconnect all wires, connectors and tubing.
b.Attach each piece of the cut tubing to the large ends of the T-fitting,
included in the kit.
c.Attach one end of the 1/16 inch ID blue tubing, included in the kit, to
the small end of the T-fitting.
Position the bleed-off orifice and connect tubing.
1
CAUTION–Do not apply any force or flex the PC Board when connecting or
disconnecting electronic or pneumatic components. Damage to the electronic
assembly is possible.
2
MANIFOLD
The manifold is attached to the accumulator tank and performs the same function
as a purge harness. It directs a small amount of pressurized oxygen into the
discharging sieve bed to aid the nitrogen exhaust process while it ensures that
the majority of pressurized oxygen is directed into the accumulator tank. The
manifold also prevents reverse flow of oxygen from the accumulator to the sieve
beds.
Insert an opened paperclip through the hole in the case, behind where the PC board
was installed (Fig. 1), until it appears in the filter cavity (Fig. 2).
3
4
Place the orifice fitting, included in
the kit, onto the end of the paperclip
(Fig. 3).
Push the fitting through the foam
until it’s inside the case. Remove
the paperclip and attach the 1/16
inch ID tubing (Fig. 4).
See CHECK VALVES: MANIFOLD and SIEVE in this manual for additional
information.
19
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C O M P O N E N T T E S T I N G , R E PA I R A N D R E P L A C E M E N T
1. Ensure any contamination problem has been corrected.
2. Ensure the unit is unplugged from the wall outlet.
3.Cut the plastic cable ties that secure the sieve beds to the internal structure
of the unit.
4. Remove the tubing from the fittings at the top of each sieve bed.
5.Remove the hose clamps and hose from the bottom of the sieve beds.
6.Install new sieve beds in reverse order using new plastic cable ties.
Position the new beds so that the bed serial number label is at the top of
the unit.
7.Leak test all connections with a certified leak detection solution such as
Snoop® or equivalent (must not contain ethylene glycol). Apply leak test
solution to all fittings and hose connections with unit running. If an air leak
is present, the solution will bubble. All leaks should be repaired before
putting the unit back in service.
MOLECULAR SIEVE BEDS
The build and release of pressure in the sieve beds indicates the health of the
sieve material and the operation of contributing components. Determine ‘good’ or
expected pressures for your altitude by testing bed pressures on multiple oxygen
concentrators that are producing at least 93% purity.
Check sieve bed pressures at the accumulator tank using the manifold test point
or the accumulator tank test point. See Figures below.
CAUTION–Do not apply leak test solution to any part of the rotary valve or the
main PC Board assembly.
Accumulator "T" Fitting
Manifold
POWER CORD
NOTE–The pressure will rise and fall as it cycles through the rotary valve.
To replace the power cord - 115 volt units
only:
Also consider the acceptable pressure range for various altitudes as shown
below.
1. Make sure the unit is unplugged from the wall outlet.
2. Use the Cabinet Removal instructions listed previously to open the unit.
3. Disconnect the power cord connector.
4. Note wire colors and socket locations before removing wires.
5.Using a pair of duckbill pliers, squeeze the power cord strain relief and pull
it out of the base of the unit.
6.Insert a new power cord through the hole in the base of the unit and secure
with strain relief.
7.Insert sockets into connector housing and then reconnect the power cord
connector.
8. Replace back cabinet and secure with the six screws.
EXPECTED ACCUMULATOR TANK PRESSURE RANGE @ 5 LPM
Altitude
Psi
kPa
0 to 457 m
23-32
159-221
0 to 1500 ft.
457 to 914 m
21-29
145-200
1500 to 3000 ft.
914 to 1524 m
20-27
138-186
3000 to 5000 ft.
Includes a pressure drop of 4-5 psi and 27-34 kPa during the pressure cycle.
To test sieve bed pressures:
POWER SWITCH
To replace the power switch:
1.Remove the plugged piece of 1/16" tubing from the manifold or the
accumulator tank.
2.Connect the pressure gauge to the test point and observe the cycling of
pressures. Refer to the section on Normal Operating Sequence and also
Accumulator Pressure Test.
a.If it is determined that the valve is not cycling the pressure, refer to
the section on Rotary Valve testing.
b. If the unit is cycling properly, allow it to operate for 20 minutes.
3.After 20 minutes of operation, observe the high and low pressures and
check the oxygen concentration level.
a.If the pressures are within the expected range and the oxygen
concentration is within specification, the sieve material is effective.
b.If pressures are not within the expected range and/or the oxygen
concentration is not within specification, refer to the Simplified
Troubleshooting Table in this manual to determine the proper
corrective action.
1. Make sure the unit is unplugged from the wall outlet.
2.Use the Cabinet Removal instructions listed previously to open the unit.
3.Note the position of the wires and switch before removing the wires from
the switch terminals.
4.While squeezing the locking tabs on the sides of the switch, push the
switch out of the front of the unit.
5.Install the new switch in the correct orientation making sure that it locks into
position.
6. Reconnect the wires to the switch terminals.
Switch Detail
NOTE–If the molecular sieve material is found to be no longer effective, first
search for the source of a malfunction in the system; then, for a cause for
contamination (such as leaks) and take corrective action.
Brown Wire (or 2 Black Wires)
*Red Wire
2 Black Wires (or 1 Brown Wire)
*Either red wire can be connected to either left hand terminal of the switch
To replace the molecular sieve beds:
NOTE–Make sure that the sealing caps remain on the new sieve beds until just
prior to connecting hoses and tubing.
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*Red Wire
20
C O M P O N E N T T E S T I N G , R E PA I R A N D R E P L A C E M E N T
NOTE–If the concentrator has been unused for an extended period, the unit must
run 20 minutes before the power fail alert will be enabled. This alert is powered
by a capacitor on the PC board.
PRESSURE REGULATOR
The pressure regulator stabilizes the flow of oxygen to the patient and
establishes back pressure on the system. It is preset at 8.5 psi (58.6 kPa) and
should not have to be adjusted in the field. It is not necessary to test the
pressure regulator unless there is a problem with flow rate accuracy. The
following test is only needed when troubleshooting flow rate issues.
CAUTION–Do not apply any force or flex to the PC Board when connecting or
disconnecting electronic or pneumatic components. Damage to the electronic
assembly is possible.
To test the pressure regulator:
To remove and replace the PC board:
1. Turn the unit “On.”
2. Set the flow meter at 2 lpm.
3.Attach a pressure gauge (part #PVO2D-601) to the oxygen outlet to obtain
a reference pressure. Use this reference pressure to determine if further
testing is needed.
4. If the reference pressure varies from the expected pressure by more than ±
0.5 psi or ± 5.9 kPa, connect a ‘T’ fitting directly between the pressure
regulator fitting and the pressure regulator tubing and attach the pressure
gauge to the 3rd leg of the ‘T’ fitting. If the pressure reading is not within
8.5 ± .5 psi (58.6± 5.9 kPa), adjustment to the pressure regulator is
required.
1. Make sure the unit is unplugged from the wall outlet.
2. Use the Cabinet Removal instructions listed previously to open the unit.
3. Disconnect all wires, terminals and connectors.
4. Remove the 1/8" (3.2mm) tubing attached to the sensor.
5.Remove the screw that secures the board to the unit and remove the PC
board.
6. Install the new PC board and secure it using the screw.
7.Reconnect all electrical wires, terminals, connectors and the tubing to the
sensor.
To adjust the pressure regulator:
The timed rotary valve alternately distributes pressure supplied by the
compressor to the sieve beds. While one bed is being pressurized the other bed
is being exhausted through the valve exhaust port.
ROTARY VALVE
1. If necessary, the pressure regulator can be adjusted by turning the allen
screw on top of the regulator until the pressure is within specification. Turn
clockwise to increase the pressure, and counterclockwise to decrease the
pressure.
The valve contains two revolving discs powered by a stepper motor to cycle the
pressure between the beds. DC voltage is supplied by the PC board to the motor
windings causing the internal discs to turn and direct pressure to the proper sieve
bed.
NOTE–Before adjusting the pressure regulator, make sure no leaks exist by
using a certified leak detection solution such as Snoop® or equivalent (must not
contain ethylene glycol).
Stepper Motor
CAUTION–Do not apply leak test solution to any part of the rotary valve or the
main PC Board assembly.
Valve Wire Harness
A malfunction in the pressure regulator will cause either a loss or fluctuation in
the oxygen flow which will be seen on the flow meter or a decrease in oxygen
concentration.
To replace the pressure regulator:
1. Make sure the unit is unplugged from the wall outlet.
2.Use the Cabinet Removal instructions listed previously to open the unit.
3. Remove the tubing clamp and tubing from the pressure regulator.
4. Unscrew the regulator from the accumulator tank.
5.Install a new regulator on the accumulator tank and attach the tubing and
tubing clamp.
Front View
PRINTED CIRCUIT BOARD
Rear View
If the rotary valve is not shifting properly, one bed may pressurize continuously;
the pressure building until the pressure relief valve, on the compressor, releases
the excess with a sputtering sound.
The printed circuit (PC) board is responsible for monitoring and controlling the
DeVilbiss Oxygen Concentrator.
The PC board has preset alerts for low flow and power failure. Should any of the
alert values be exceeded, the patient alert system will activate.
There are several reasons why the rotary valve could malfunction; therefore the
cause of failure must be determined before corrective action can be taken.
To test the rotary valve:
1.Use the Cabinet Removal instructions listed previously to open the unit for
testing.
2.Connect a pressure gauge to the test point on the manifold or accumulator
tank to observe unit cycling and the high and low bed pressures. Refer to
the section on Normal Operating Sequence and also Accumulator Pressure
Test.
a.If it is determined that the valve is shifting properly and the high and
low pressures are consistent, the valve is operating correctly.
OSD
Valve Wire Harness
Fuse
21
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C O M P O N E N T T E S T I N G , R E PA I R A N D R E P L A C E M E N T
b.If it is determined that the valve did not shift properly or the high
pressures or low pressures are uneven, continue testing with step 3.
3.The stepper motor on the rotary valve has multiple windings so there are
several voltage readings that need to be checked in order to determine if
the problem is being caused by the PC board or the valve itself. Testing for
proper voltage is done at the wire harness connectors on the valve or on
the PC Board using a voltmeter.
Voltmeter
Leads
Testing Valve Voltage at PC Board
elow are the valve voltage test positions and voltages that should be present at
B
each one:
NOTE–The 1-3 Volt reading will go on and off as the valve cycles. 525
Series have a fixed cycle time of 3.6 seconds @5 LPM. However, when the
concentrator goes into its “turn-down” mode, the cycle time is shortened.
Negative Lead
Positive Lead
Voltage Reading
Orange
Yellow or White
12 VDC
Orange
Gray
5 VDC
Orange
Brown
5 VDC (intermittent)
Black or Green or Red
or Blue
Yellow or White
1-3 VDC (intermittent)
a.If any of these readings are not obtained, check for loose or broken
wires in the harness. If wire harness is okay, replace the main PC
board.
b. If proper voltages are obtained, replace valve.
To replace the rotary valve:
1. Make sure the unit is unplugged from the wall outlet.
2.Use the Cabinet Removal instructions listed previously to open the unit.
3. Unplug valve wire harness from the valve.
4.Loosen clamps and remove bed hoses from each side of valve.
5.Loosen ladder clamps and remove pressure intake and exhaust hoses from
backside of valve.
6.Install the new rotary valve by reversing the above procedure.
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22
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525DS Unit - Serial # "F" (115V Units)
525DS & 525DS-Q Units - Serial # "J" (115V Units)
Front View
10-11
Rear View
48
40
29-30
43
23
5
7
17
9
46
8
14
45
3
Front Inside
33
53
36
1
44-32
47
Behind Front Cover/Bib
Rear Inside
49
4
38
28 or 41
52
24
27
53
25
39
16 (Final Check Valve
not visible - behind
oxygen outlet port)
Fan & Capacitor
34
15
12
50
35
6
20-21
54
42
19
18
13
Compressor Box
51
55
22
31
37
23
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F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525DS Unit - Serial # "F" (115V Units)
525DS & 525DS-Q Units - Serial # "J" (115V Units)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
LT-2023
PART DESCRIPTION
Accumulator Tank
Auxiliary Oxygen Port
Cabinet Parts:
Base
Bib
Communication Port Door
Compressor Box
Filter Door
Front Cover
Rear Cover
Cabinet Screw (Original)
Cabinet Screw (plastite)
Cable Tie, (Sieve Bed)
Capacitor (Motor Start/Run)
Caster, Non-locking
Check Valves:
Bed Check Valve
Final Check Valve
Circuit Breaker
Cooling Fan
Cooling Fan Guard
Compressor
Compressor Rebuild Kit
Exhaust Muffler
Filters:
Cabinet Air Filter
Intake Bacteria Filter
Compressor Filter (Plastic)
Compressor Filter (Sintered Bronze)
Final Bacteria Filter
Fittings:
Accumulator Tank "Tee"
Flow Meters:
Standard Flow Meter
Low Output Meter
Foam Kit
Fuse (For PC Board)
Hoses:
1/8" ID (Blue) (4' Lg)
1/2" ID PVC Braided (4' Lg)
1/2" ID Silicone Braided (2' Lg)
Hose Clamps:
Plastic (1/4" ID Hose)
Ladder Clamp (1/2" ID Hoses)
Hour Meter
Intake Canister
Light Panel / Ribbon Cable
Purge Manifold Assembly
Motor Mounts
Oxygen Outlet Port
PC Board
Power Cord w/Strain Relief
Power Cord Strap
Power Cord Strain Relief
Power Switch
Pressure Regulator
Pressure Relief Valve
Rotary Valve
Sieve Bed
Wire Harness:
Communication Harness/Port
Main Harness
Rotary Valve Harness
525DS
"F" SERIAL #
525DS
"J" SERIAL #
525DS-Q
"J" SERIAL #
525D-603
525D-604
525D-640
525D-605
525D-639
525D-601
525D-602
525DD-628
N/A
505DZ-617
525D-616
501DZ-603
525DD-603
N/A
525DD-640
525DD-605
525DD-639
525DD-601
525DD-602
525DD-628
N/A
505DZ-617
525D-616
501DZ-603
525DD-603
N/A
525DD-640
525DD-605
525DD-639
525DD-601
525DD-602
525DD-628
N/A
505DZ-617
525D-616
501DZ-603
PVO2D-607
PVO2D-607
525D-613
525DD-634
N/A
525D-625
525D-643
515A-705
PVO2D-607
PVO2D-607
525D-613
525DD-634
N/A
525D-625
525D-643
515A-705
PVO2D-607
PVO2D-607
525D-613
525DD-634
N/A
525D-625
525D-643
515A-705
303DZ-605
MC44D-605
525D-622
N/A
PV5LD-651
303DZ-605
MC44D-605
525D-622
N/A
PV5LD-651
303DZ-605
MC44D-605
525D-622
N/A
PV5LD-651
444-582
444-582
444-582
505DZ-607
515LF-607
525D-600
515ADZ-627
505DZ-607
515LF-607
N/A
515ADZ-627
505DZ-607
515LF-607
N/A
515ADZ-627
444-554
444-549
505DZ-634
444-554
444-549
505DZ-634
444-554
444-549
505DZ-634
N/A
444-566
PV5LD-617
525DD-614
525D-615
N/A
505IZ-609
525DD-606
525DS-622
PV5LD-618
MC29D-657
505DZ-645
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
N/A
444-566
PV5LD-617
525DD-614
525D-615
525DD-617
505IZ-609
525DD-606
525DS-622
PV5LD-618
MC29D-657
505DZ-645
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
N/A
444-566
PV5LD-617
525DD-614
525D-615
525DD-617
505IZ-609
525DD-606
525DS-622
PV5LD-618
MC29D-657
505DZ-645
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
525D-608
515DZ-623
525D-621
525D-608
515DZ-623
525D-621
525D-608
515DZ-623
525D-621
525D-610
N/A
24
525D-610
N/A
525D-610
N/A
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525DS Unit - Serial # "N" (115V Units with Auxiliary Oxygen Port)
525DS-Q Unit - Serial # "R" (115V Units with Auxiliary Oxygen Port)
Front View
Rear View
40
11
48
7
23
43
2
29-30
8
17
14
46
9
45
47
3
Front Inside
1
44
49
36 (Plastic Clamp
Behind Front Cover
27
Compressor Box - Serial # "N"
not shown secures hose
to regulator)
33
41
54
32
26
52
55
(Sintered
filter located
in hose)
Fan & Capacitor
12
19
18
13
Compressor Box - Serial # "R"
22
31
37
51
25
LT-2023
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525DS Unit - Serial # "N" (115V Units with Auxiliary Oxygen Port)
525DS-Q Unit - Serial # "R" (115V Units with Auxiliary Oxygen Port)
Rear Inside - Serial # "N"
Rear Inside - Serial # "R"
38
24
34
39
25
50
35
6
20-21
42
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
LT-2023
PART DESCRIPTION
Accumulator Tank
Auxiliary Oxygen Port
Cabinet Parts:
Base
Bib
Communication Port Door
Compressor Box
Filter Door
Front Cover
Rear Cover
Cabinet Screw (Original)
Cabinet Screw (plastite)
Cable Tie, (Sieve Bed)
Capacitor (Motor Start/Run)
Caster, Non-locking
Check Valves:
Bed Check Valve
Final Check Valve
Circuit Breaker
Cooling Fan
Cooling Fan Guard
Compressor
Compressor Rebuild Kit
Exhaust Muffler
Filters:
Cabinet Air Filter
Intake Bacteria Filter
Compressor Filter (Plastic)
Compressor Filter (Sintered Bronze)
Final Bacteria Filter
Fittings:
Accumulator Tank "Tee"
525DS
"N" SERIAL #
525DS-Q
"R" SERIAL #
525DD-603
N/A
N/A
525DD-615
525DD-639
525DD-611
525DD-612
N/A
N/A
505DZ-617
525D-616
501DZ-603
525DD-603
N/A
N/A
525DD-615
525DD-639
525DD-611
525DD-612
N/A
N/A
505DZ-617
525D-616
501DZ-603
N/A
N/A
525D-613
525DD-634
N/A
525D-625
525D-643
515A-705
N/A
N/A
525D-613
525DD-634
N/A
525D-625
525D-643
515A-705
303DZ-605
MC44D-605
525D-622
525DD-626
PV5LD-651
303DZ-605
MC44D-605
525D-622
525DD-626
PV5LD-651
N/A
N/A
525D-610
N/A
26
525D-610
N/A
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525DS Unit - Serial # "N" (115V Units with Auxiliary Oxygen Port)
525DS-Q Unit - Serial # "R" (115V Units with Auxiliary Oxygen Port)
PART DESCRIPTION
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
Flow Meters:
Standard Flow Meter
Low Output Meter
Foam Kit
Fuse (For PC Board)
Hoses:
1/8" ID (Blue) (4' Lg)
1/2" ID PVC Braided (4' Lg)
1/2" ID Silicone Braided (2' Lg)
Hose Clamps:
Plastic (1/4" ID Hose)
Ladder Clamp (1/2" ID Hoses)
Hour Meter
Intake Canister
Light Panel / Ribbon Cable
Purge Manifold Assembly
Motor Mounts
Oxygen Outlet Port
PC Board
Power Cord w/Strain Relief
Power Cord Strap
Power Cord Strain Relief
Power Switch
Pressure Regulator
Pressure Relief Valve
Rotary Valve
Sieve Bed
Wire Harness:
Communication Harness/Port
Main Harness
Rotary Valve Harness
27
525DS
"N" SERIAL #
525DS-Q
"R" SERIAL #
505DZ-607
515LF-607
N/A
515ADZ-627
505DZ-607
515LF-607
N/A
515ADZ-627
444-554
444-549
505DZ-634
444-554
444-549
505DZ-634
N/A
444-566
PV5LD-617
N/A
525D-615
525DD-617
505IZ-609
525DD-606
525DD-622
PV5LD-618
MC29D-657
505DZ-645
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
N/A
444-566
PV5LD-617
525DD-614
525D-615
525DD-617
505IZ-609
525DD-606
525DD-622
PV5LD-618
MC29D-657
505DZ-645
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
N/A
525DD-623
525D-621
N/A
525DD-623
525D-621
LT-2023
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525KS Unit - Serial # "F" (220/230/240V Units)
525KS & 525KS-LT Units - Serial # "J" (220/230/240V Units)
Front View
10-11
Rear View
48
40
29-30
43
23
7
5
17
9
46
8
56
14
45
Behind Front Cover/Bib
3
Front Inside
33
53
36
1
44-32
Rear Inside
49
38
28 or 41
24
52
27
53
19
18
35
50
31
6
20-21
51
13
Compressor Box
55
22
42
54
LT-2023
not visible - behind
oxygen outlet port)
25
34
15
16 (Final Check Valve
Fan & Capacitor
39
12
4
28
57
37
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525KS Unit - Serial # "F" (220/230/240V Units)
525KS & 525KS-LT Units - Serial # "J" (220/230/240V Units)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
PART DESCRIPTION
Accumulator Tank
Auxiliary Oxygen Port
Cabinet Parts:
Base
Bib
Communication Port Door
Compressor Box
Filter Door
Front Cover
Rear Cover
Cabinet Screw (Original)
Cabinet Screw (plastite)
Cable Tie, (Sieve Bed)
Capacitor (Motor Start/Run)
Caster, Non-locking
Check Valves:
Bed Check Valve
Final Check Valve
Circuit Breaker
Cooling Fan
Cooling Fan Guard
Compressor
Compressor Rebuild Kit
Exhaust Muffler
Filters:
Cabinet Air Filter
Intake Bacteria Filter
Compressor Filter (Plastic)
Compressor Filter (Sintered Bronze)
Final Bacteria Filter
Fittings:
Accumulator Tank "Tee"
Flow Meters:
Standard Flow Meter
Low Output Meter
Foam Kit
Fuse (For PC Board)
Hoses:
1/8" ID (Blue) (4' Lg)
1/2" ID PVC Braided (4' Lg)
1/2" ID Silicone Braided (2' Lg)
Hose Clamps:
Plastic (1/4" ID Hose)
Ladder Clamp (1/2" ID Hoses)
Hour Meter
Intake Canister
Light Panel / Ribbon Cable
Purge Manifold Assembly
Motor Mounts
Oxygen Outlet Port
PC Board
Power Cord w/Strain Relief
Power Cord Strap
Power Cord Strain Relief
Power Switch
Pressure Regulator
Pressure Relief Valve
Rotary Valve
Sieve Bed
Wire Harness:
Communication Harness/Port
Main Harness
Rotary Valve Harness
IEC Connector
Thermostat
525KS
"F" SERIAL #
525KS
"J" SERIAL #
525KS-LT
"J" SERIAL #
525K-603
525D-604
525D-640
525D-605
525D-639
525D-601
525D-602
525DD-628
N/A
505DZ-617
525K-616
501DZ-603
525KD-603
N/A
525DD-640
525DD-605
525DD-639
525DD-601
525DD-602
525DD-628
N/A
505DZ-617
525K-616
501DZ-603
525KD-603
N/A
525DD-640
525DD-605
525DD-639
525DD-601
525DD-602
525DD-628
N/A
505DZ-617
525K-616
501DZ-603
PVO2D-607
PVO2D-607
515KZ-615
515UK-634
N/A
525K-625
525K-643
515A-705
PVO2D-607
PVO2D-607
515KZ-615
515UK-634
N/A
525K-625
525K-643
515A-705
PVO2D-607
PVO2D-607
515KZ-615
515UK-634
N/A
525K-625
525K-643
515A-705
303DZ-605
MC44D-605
525D-622
N/A
PV5LD-651
303DZ-605
MC44D-605
525D-622
N/A
PV5LD-651
303DZ-605
MC44D-605
525D-622
N/A
PV5LD-651
444-582
444-582
444-582
505DZ-607
515LF-607
525D-600
515AKZ-610
505DZ-607
515LF-607
N/A
515AKZ-610
505DZ-607
515LF-607
N/A
515AKZ-610
444-554
444-549
505DZ-634
444-554
444-549
505DZ-634
444-554
444-549
505DZ-634
N/A
444-566
PV5LD-617
525DD-614
525D-615
N/A
505IZ-609
525DD-606
525KS-622
VARIOUS
MC29D-657
N/A
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
N/A
444-566
PV5LD-617
525DD-614
525D-615
525DD-617
505IZ-609
525DD-606
525KS-622
VARIOUS
MC29D-657
N/A
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
N/A
444-566
PV5LD-617
525DD-614
525D-615
525DD-617
505IZ-609
525DD-606
525KS-622
VARIOUS
MC29D-657
N/A
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
525D-608
515AKS-623
525D-621
N/A
N/A
525D-608
515AKS-623
525D-621
N/A
N/A
525D-608
515AKS-623
525D-621
N/A
N/A
525D-610
N/A
29
525D-610
N/A
525D-610
N/A
LT-2023
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525KS-LT Unit - Serial # "N" (220/230/240V Units with Auxiliary Oxygen Port)
525KS Unit - Serial # "R" (220/230/240V Units with Auxiliary Oxygen Port)
Front View
11
Rear View
40
48
7
23
43
2
29-30
8
17
46
9
45
14
56
3
Front Inside
1
44
49
Behind Front Cover
36 (Plastic Clamp not
shown - secures
hose to regulator)
33
27
41
32
52
Fan & Capacitor
19
18
55
12
13
Compressor Box - Serial # "N"
51
Compressor Box - Serial # "R"
37
57
54
26
LT-2023
30
(Sintered filter
located in hose)
22
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525KS-LT Unit - Serial # "N" (220/230/240V Units with Auxiliary Oxygen Port)
525KS Unit - Serial # "R" (220/230/240V Units with Auxiliary Oxygen Port)
Rear Inside - Serial # "N"
Rear Inside - Serial # "R"
38
24
34
39
25
50
35
6
20-21
42
PART DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
Accumulator Tank
Auxiliary Oxygen Port
Cabinet Parts:
Base
Bib
Communication Port Door
Compressor Box
Filter Door
Front Cover
Rear Cover
Cabinet Screw (Original)
Cabinet Screw (plastite)
Cable Tie, (Sieve Bed)
Capacitor (Motor Start/Run)
Caster, Non-locking
Check Valves:
Bed Check Valve
Final Check Valve
Circuit Breaker
Cooling Fan
Cooling Fan Guard
Compressor
Compressor Rebuild Kit
Exhaust Muffler
Filters:
Cabinet Air Filter
Intake Bacteria Filter
Compressor Filter (Plastic)
Compressor Filter (Sintered Bronze)
Final Bacteria Filter
31
525KS-LT
"N" SERIAL #
525KS
"R" SERIAL #
525D-610
N/A
525D-610
N/A
525KD-603
N/A
N/A
525DD-615
525DD-639
525DD-611
525DD-612
N/A
N/A
505DZ-617
525K-616
501DZ-603
525KD-603
N/A
N/A
525DD-615
525DD-639
525DD-611
525DD-612
N/A
N/A
505DZ-617
525K-616
501DZ-603
N/A
N/A
515KZ-615
515UK-634
N/A
525K-625
525K-643
515A-705
N/A
N/A
515KZ-615
515UK-634
N/A
525K-625
525K-643
515A-705
303DZ-605
MC44D-605
525D-622
525DD-626
PV5LD-651
303DZ-605
MC44D-605
525D-622
525DD-626
PV5LD-651
LT-2023
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525KS-LT Unit - Serial # "N" (220/230/240V Units with Auxiliary Oxygen Port)
525KS Unit - Serial # "R" (220/230/240V Units with Auxiliary Oxygen Port)
PART DESCRIPTION
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
LT-2023
Fittings:
Accumulator Tank "Tee"
Flow Meters:
Standard Flow Meter
Low Output Meter
Foam Kit
Fuse (For PC Board)
Hoses:
1/8" ID (Blue) (4' Lg)
1/2" ID PVC Braided (4' Lg)
1/2" ID Silicone Braided (2' Lg)
Hose Clamps:
Plastic (1/4" ID Hose)
Ladder Clamp (1/2" ID Hoses)
Hour Meter
Intake Canister
Light Panel / Ribbon Cable
Purge Manifold Assembly
Motor Mounts
Oxygen Outlet Port
PC Board
Power Cord w/Strain Relief
Power Cord Strap
Power Cord Strain Relief
Power Switch
Pressure Regulator
Pressure Relief Valve
Rotary Valve
Sieve Bed
Wire Harness:
Communication Harness/Port
Main Harness
Rotary Valve Harness
IEC Connector
Thermostat
32
525KS-LT
"N" SERIAL #
525KS
"R" SERIAL #
N/A
N/A
505DZ-607
515LF-607
N/A
515AKZ-610
505DZ-607
515LF-607
N/A
515AKZ-610
444-554
444-549
505DZ-634
444-554
444-549
505DZ-634
N/A
444-566
PV5LD-617
N/A
525D-615
525DD-617
505IZ-609
525DD-606
525KD-622
VARIOUS
MC29D-657
N/A
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
N/A
444-566
PV5LD-617
525DD-614
525D-615
525DD-617
505IZ-609
525DD-606
525KD-622
VARIOUS
MC29D-657
N/A
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
N/A
525KD-623
525D-621
N/A
N/A
N/A
525KD-623
525D-621
N/A
N/A
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525PS Unit - Serial # "F" (220/230/240V Units)
525PS Unit - Serial # "J" (220/230/240V Units)
Front View
10-11
Rear View
48
40
29-30
43
23
7
5
17
9
46
8
56
14
45
Behind Front Cover/Bib
3
Front Inside
33
53
36
1
44-32
Rear Inside
49
38
28 or 41
24
52
27
53
not visible - behind
oxygen outlet port)
19
25
18
34
15
16 (Final Check Valve
Fan & Capacitor
39
12
4
35
50
31
6
13
20-21
22
Compressor Box
51
42
55
57
54
26
37
33
(Sintered filter
located in hose)
LT-2023
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
525PS Unit - Serial # "F" (220/230/240V Units)
525PS Unit - Serial # "J" (220/230/240V Units)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
LT-2023
PART DESCRIPTION
Accumulator Tank
Auxiliary Oxygen Port
Cabinet Parts:
Base
Bib
Communication Port Door
Compressor Box
Filter Door
Front Cover
Rear Cover
Cabinet Screw (Original)
Cabinet Screw (plastite)
Cable Tie, (Sieve Bed)
Capacitor (Motor Start/Run)
Caster, Non-locking
Check Valves:
Bed Check Valve
Final Check Valve
Circuit Breaker
Cooling Fan
Cooling Fan Guard
Compressor
Compressor Rebuild Kit
Exhaust Muffler
Filters:
Cabinet Air Filter
Intake Bacteria Filter
Compressor Filter (Plastic)
Compressor Filter (Sintered Bronze)
Final Bacteria Filter
Fittings:
Accumulator Tank "Tee"
Flow Meters:
Standard Flow Meter
Low Output Meter
Foam Kit
Fuse (For PC Board)
Hoses:
1/8" ID (Blue) (4' Lg)
1/2" ID PVC Braided (4' Lg)
1/2" ID Silicone Braided (2' Lg)
Hose Clamps:
Plastic (1/4" ID Hose)
Ladder Clamp (1/2" ID Hoses)
Hour Meter
Intake Canister
Light Panel / Ribbon Cable
Purge Manifold Assembly
Motor Mounts
Oxygen Outlet Port
PC Board
Power Cord w/Strain Relief
Power Cord Strap
Power Cord Strain Relief
Power Switch
Pressure Regulator
Pressure Relief Valve
Rotary Valve
Sieve Bed
Wire Harness:
Communication Harness/Port
Main Harness
Rotary Valve Harness
IEC Connector
Thermostat
525PS
"F" SERIAL #
525PS
"J" SERIAL #
525K-603
525D-604
525D-640
525D-605
525D-639
525D-601
525D-602
525DD-628
N/A
505DZ-617
525K-616
501DZ-603
525KD-603
N/A
525DD-640
525DD-605
525DD-639
525DD-601
525DD-602
525DD-628
N/A
505DZ-617
525K-616
501DZ-603
PVO2D-607
PVO2D-607
515KZ-615
515UK-634
N/A
525PS-625
525K-643
515A-705
PVO2D-607
PVO2D-607
515KZ-615
515UK-634
N/A
525PS-625
525K-643
515A-705
303DZ-605
MC44D-605
525D-622
N/A
PV5LD-651
303DZ-605
MC44D-605
525D-622
525DD-626
PV5LD-651
444-582
444-582
505DZ-607
515LF-607
525D-600
515AKZ-610
505DZ-607
515LF-607
N/A
515AKZ-610
444-554
444-549
505DZ-634
444-554
444-549
505DZ-634
N/A
444-566
PV5LD-617
525DD-614
525D-615
N/A
505IZ-609
525DD-606
525KS-622
VARIOUS
MC29D-657
N/A
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
N/A
444-566
PV5LD-617
525DD-614
525D-615
525DD-617
505IZ-609
525DD-606
525KS-622
VARIOUS
MC29D-657
N/A
505DZ-508
MC29D-612
515ADZ-614
515ADZ-702
525D-619
525D-608
515AKS-623
525D-621
N/A
N/A
525D-608
515AKS-623
525D-621
N/A
N/A
525D-610
N/A
34
525D-610
N/A
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
ACCESSORIES
Carton with Shipping Inserts
525D-606
Oxygen Outlet Connector - Plastic
XM-1
Casters, Locking
525DS-603
Low Output Flow Meter
515LF-607
Transfill Caddy
525DD-650
Transfill Hose
PF1100TUB
TOOLS
Service Kit
444-501
Pressure Gauge
PVO2D-601
Pressure Test Assembly
303DZ-637
Oxygen Analyzer (Max O2)
Oxygen Analyzer (Handi+)
R217P62
R218P12
35
LT-2023
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
Pneumatic Diagram
LT-2023
36
F I G U R E S , D I A G R A M S A N D PA R T S L I S T
Wiring Diagram
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LT-2023
O R D E R I N G I N F O R M AT I O N A N D PA R T S R E T U R N
ORDERING INFORMATION
When ordering components, instruction guides, or service manuals the following must be provided:
•
Unit Catalog Number
•
Unit Serial Number
•
Part Number
•
Quantity Required
DeVilbiss Concentrator 5 Liter Series Instruction Guide:
•
A-525D3 525DS
English, Spanish, French
•
PS-525P3
525PS, 525KS, 525DS
English, Spanish, Arabic
•
SE-525K3
525DS, 525KS, 525PS
English, Spanish, French, German, Italian, Dutch, Portuguese, Polish, Turkish
DeVilbiss Concentrator 5 Liter Series Service Manual:
•
LT-2023
525DS, 525KS & 525PS
English
•
LT-2023-DE
525DS, 525KS & 525PS
German
•
LT-2023-ES
525DS, 525KS & 525PS
Spanish
•
LT-2023-FR
525DS, 525KS & 525PS
French
•
LT-2023-PT
525DS, 525KS & 525PS
Portuguese
DeVilbiss Oxygen Concentrator Service Log:
•
A-1007AllEnglish
Orders may be placed by calling:
•
Customer Service
800-338-1988
•
Warranty parts - U.S.A. 800-338-1988
•
International Department 814-443-4881
•
Europe
+49 (0) 621-178-98-0
PARTS RETURN
Before returning parts or units to the factory, call the DeVilbiss Healthcare Customer Service Department (800-338-1988) or (814-443-4881) to obtain a return
authorization number. Include in the package a note indicating the return authorization number along with your company name, address, phone number, and account
number. The return authorization number should also be written on the outside of the package.
To expedite your order for warranty or non-warranty parts, the following information should be given to the representative:
•
Catalog number
•
Serial number
•
Hour meter reading for each concentrator
•
Account number
•
Company name and address
•
Description of problem
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S P E C I F I C AT I O N S
DEVILBISS 5-LITER SERIES
Catalog Number
Delivery Rate (Lower delivery rates available
for low flow applications)
Maximum Recommended Flow(@ nominal
outlet pressures of zero and 7 kPa)
Outlet Pressure
525DS / 525DS-Q
525KS / 525KS-LT
525PS
0.5 to 5 LPM
0.5 to 5 LPM
0.5 to 5 LPM
5 LPM
5 LPM
5 LPM
8.5±0.5 psig (58.6±3.5 kPa)
Outlet Pressure: 8.5±0.5 psig
(58.6±3.5 kPa)
Outlet Flow: 2.5±0.5 LPM Continuous
8.5±0.5 psig (58.6±3.5 kPa)
Operating Voltage Range
97-127 V~, 60 Hz
Oxygen Percentage
perating Altitude
O
(tested at 21°C only)
0-1500 M (0-4921 ft)
1-5 LPM=87%-96%
8.5±0.5 psig (58.6±3.5 kPa)
Outlet Pressure: 8.5±0.5 psig
(58.6±3.5 kPa)
Outlet Flow: 2.5±0.5 LPM Continuous
220-230 V~, 50 Hz, 1.55 Amp
230 V~, 60 Hz, 1.9 Amp
187-253 V~, 50 Hz
195-255 V~, 60 Hz
1-5 LPM=87%-96%
Across the voltage range:
No degradation of performance
Tested at nominal voltage only:
No degradation of performance
Across the voltage range:
No degradation of performance
Tested at 230V/50Hz only:
No degradation of performance
Auxiliary Oxygen Port****
Electrical Rating
1500-4000 M (4921-13123 ft)
perating Environment Range*
O
5°C to 40°C, humidity range of 10% to
95%
Power Consumption
Weight
Sound Level (ISO 8359:1996 from front)
Dimensions
Pressure Relief Valve
Operating System
he visible “low oxygen” indicator will
T
activate at the following level
Storage Conditions
115 V~, 60 Hz, 3.3 Amp
220-230 V~, 60 Hz, 1.68 Amp
187-253 V~, 60 Hz
1-5 LPM=87%-96%
Across the voltage range:
No degradation of performance
Tested at 230V/60Hz only:
No degradation of performance
No degradation in performance across the
operating voltage range.
No degradation in performance across the
No degradation in performance across the
operating voltage range.
operating voltage range.
230V / 50 Hz - 312 Watts Average
230V / 50 Hz - 296 Watts Average @
230V / 60 Hz - 334 Watts Average
310 Watts Average
1.2 LPM & below
230V / 60 Hz - 297 Watts Average @
275 Watts @ 1.2 LPM & below
230V / 60 Hz - 387 Watts Average
2.5 LPM & below
230V / 60 Hz - 369 Watts Average @
1.2 LPM & below
36 lbs. (16.3 Kilograms)
36 lbs. (16.3 Kilograms)
36 lbs. (16.3 Kilograms)
48 dBA (525DS)
<40 dBA (50Hz) (525KS)
40 dBA (50Hz)
46 dBA (525DS-Q)
48 dBA (525KS-LT)
24.5”H x 13.5”W x 12”D
24.5”H x 13.5”W x 12”D
24.5”H x 13.5”W x 12”D
(62.2 x 34.2 x 30.4 cm)
(62.2 x 34.2 x 30.4 cm)
(62.2 x 34.2 x 30.4 cm)
45 psig±5 psig (310 kPa±34.5 kPa)
45 psig±5 psig (310 kPa±34.5 kPa)
45 psig±5 psig (310 kPa±34.5 kPa)
Time Cycle / Pressure Swing
Time Cycle / Pressure Swing
Time Cycle / Pressure Swing
3.6 sec. at 5 LPM
3.6 sec. at 5 LPM
3.6 sec. at 5 LPM
84% ± 2%
84% ± 2%
84% ± 2%
(The audible alarm will alert at approximately (The audible alarm will alert at approximately (The audible alarm will alert at approximately
75%. At less than 60%, the red “service
75%. At less than 60%, the red “service
75%. At less than 60%, the red “service
required” light will activate.)
required” light will activate.)
required” light will activate.)
-40°C to 70°C, humidity range of 10% to
-40°C to 70°C, humidity range of 10% to
-40°C to 70°C, humidity range of 10% to
100%, including condensation
100%, including condensation
100%, including condensation
Equipment Class and Type
Class II Equipment Double Insulated;
Type B Applied Part
Ordinary Equipment, IPX0
Approval Body and Safety Standard
CSA
CAN/CSA-C22.2 No. 601.1-M90
EMC Compliance To**
Typical Accumulator Pressure at Maximum
Recommended Flow***
0-457 M (0-1,500 Ft)
457-914 M (1,500 - 3,000 Ft)
914-1524 M (3,000-5,000 Ft)
N/A
Class II Equipment Double Insulated;
Type B Applied Part
Ordinary Equipment, IPX0
TUV approved for 50 Hz only to
EN 60601+A1+A2
ISO8359: 1996/Amd.1:2012
EN60601-1-2
EN60601-1-2
23-32 psig (159-221 kPa)
21-29 psig (145-200 kPa)
20-27 psig (138-186 kPa)
23-32 psig (159-221 kPa)
21-29 psig (145-200 kPa)
20-27 psig (138-186 kPa)
Class II Equipment Double Insulated;
Type B Applied Part
Ordinary Equipment, IPX0
TUV
EN 60601+A1+A2
ISO8359: 1996/Amd.1:2012
EN60601-1-2
23-32 psig (159-221 kPa)
21-29 psig (145-200 kPa)
20-27 psig (138-186 kPa)
*NOTE: The OSD performance at 5°C to 40°C, 95% R.H. through voltage range on the 525DS verified at 670m.
**NOTE: This oxygen concentrator has been tested to and meets the EMC requirements of EN 60601-1-2. Do not place the concentrator near other equipment or devices
that create or attract electromagnetic fields. Examples of such equipment are defibrillators, diathermy equipment, CB radios, microwave ovens, etc.
***NOTE–The minimum and maximum pressures are peak accumulator pressures at 5 LPM. This includes a 4-5 psig drop during pressure cycle.
****NOTE-The maximum recommended flow is 3 LPM when an oxygen bottle is being filled with oxygen from the auxiliary oxygen port.
NOTE–Turn-down mode may cease at 0.5 LPM if a low output flow meter is not being used.
Specifications subject to change without notice
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LT-2023
D E V I L B I S S G U I D A N C E A N D M A N U F A C T U R E R ’ S D E C L A R AT I O N
WARNING
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 configuration in which it will be used.
NOTE– The EMC tables and other guidelines provide information to the customer or user that is essential in determining the suitability of the Equipment or System for the
Electromagnetic Environment of use, and in managing the Electromagnetic Environment of use to permit the Equipment or System to perform its intended use without
disturbing other Equipment and Systems or non-medical electrical equipment.
Guidance and Manufacturer’s Declaration – Electromagnetic Emissions
This device is intended for use in the electromagnetic environment specified below. The customer or the user of this device should assure that it is used in such an
environment.
Emissions Test
Compliance
Electromagnetic Environment – Guidance
RF Emissions CISPR 11
Group 1
This device uses RF energy only for its internal function. Therefore, its RF emissions are very low and
are not likely to cause any interference in nearby electronic equipment.
RF Emissions CISPR 11
Class B
Harmonic emissions
IEC 61000-3-2
Class B
Voltage fluctuations / flicker
emissions
Complies
This device is suitable for use in all establishments including domestic and those directly connected to
the public low-voltage power supply network that supplies buildings used for domestic purposes.
Guidance and Manufacturer’s Declaration – Electromagnetic Immunity
This device is intended for use in the electromagnetic environment specified below. The customer or the user of this device should assure that it is used in such an
environment.
Compliance
Level
Immunity Test
IEC 60601 Test Level
Electrostatic discharge (ESD)
IEC 61000-4-2
±6kV contact
±8kV air
Complies
Radiated RF IEC 61000-4-3
3 V/m 80MHz to 2.5GHz
Complies
Conducted RF IEC
61000-4-6
3 Vrms 150kHz to 80MHz
Complies
Electrical fast transient
IEC 61000-4-4
Surge IEC 61000-4-5
±2kV power line
±1kV I/O lines
±1kV differential
±2kV common
Power frequency magnetic
field IEC 61000-4-8
3 A/m
Voltage dips, short interrupts
and voltage variations on
power supply input lines IEC
61000-4-11
>95% dip 0.5 cycle
60% dip 5 cycles
70% dip 25 cycles
95% dip 5 secs.
LT-2023
Electromagnetic Environment - Guidance
Floors should be wood, concrete, or ceramic tile. If floors are covered with synthetic
material, the relative humidity should be at least 30%
Field strengths outside the shielded location from fixed RF transmitters, as
determined by an electromagnetic site survey, should be less than 3 V/m.
Interference may occur in the vicinity of equipment marked with the following
symbol:
Complies
Mains power quality should be that of a typical commercial or hospital environment.
Complies
Complies
Power frequency magnetic fields should be at levels characteristic of a typical
location in a typical commercial or hospital environment.
Complies
Mains power quality should be that of a typical commercial or hospital environment.
If the user of this device requires continued operation during power mains
interruptions, it is recommended that the device be powered from an uninterruptible
power supply or battery.
40
DeVilbiss Healthcare LLC
100 DeVilbiss Drive
Somerset, PA 15501-2125
USA
800-338-1988 • 814-443-4881
DeVilbiss Healthcare Ltd
Unit 3, Bloomfield Park
Bloomfield Road
Tipton, West Midlands DY4 9AP
UNITED KINGDOM
+44 (0) 121 521 3140
DeVilbiss Healthcare Pty. Limited
15 Carrington Road, Unit 8
Castle Hill NSW 2154
AUSTRALIA
+61-2-9899-3144
EC REP
DeVilbiss Healthcare SAS
13/17, Rue Joseph Priestley
37100 Tours
FRANCE
+33 (0) 2 47 42 99 42
0044
DeVilbiss Healthcare GmbH
Kamenzer Straße 3
68309 Mannheim
GERMANY
+49 (0) 621-178-98-0
D e Vi l b i ss H eal t hcare LLC • 100 De Vilb iss Dr ive • S o me r set, PA 15 5 0 1 • USA
800-338-1988 • 814-44 3 - 4 8 8 1 • www.DeVilbissHea lthcar e .co m
DeVilbiss® and OSD® are registered trademarks of DeVilbiss Healthcare. Teflon® is a registered trademark of DuPont. Snoop® is a
registered trademark of SWAGELOK
© 2017 DeVilbiss Healthcare LLC. 05.17 All Rights Reserved.
LT-2023 Rev. F
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