15
PROPER REPAIR PROCEDURES
The DeVilbiss Oxygen Concentrator is designed for ease of
service.To aid service personnel, a Service Kit (part #444-50
1)
is available which contains the necessary gauges, tools, and
testing instruments to properly service the oxygen concentra-
tor. On parts that are sold separately, the part
number is indicated in parenthesis.
The following parts are included in the Service Kit:
1 Slotted bit
1 #1 Phillips bit
1 #2 Phillips kit
1 7/16” Socket l/4” Drive
1 Crescent wrench
1 8” Duckbill pliers
1 T-10 Bit
1
5/32” Allen bit
1 5/64” Allen bit
1 9/64” Allen bit
1 7/64” Allen bit
2 0-30 PSI 0-30 in. Hg gauge (part #PVO2D-60
1)
1 Tool box
2 Test Fittings (part #303DZ-637)
1 Torx screwdriver w/bits (part #MC44D-712)
1 AC/DC test light (part #PVO2D-603)
11/4” Ratchet wrench
1 3mm Hexbit
1 T-15 Torx “L” wrench
110mm Socket l/4” Drive
11/4” Drive extension
1 Plastic storage case
1 Plastic error indicator tool (part #303DZ-635)
In addition to the Service Kit, an oxygen analyzer (part #O2ANA)
is needed to periodically check oxygen concentration levels.A
voltmeter will be needed for more accurate voltage testing.
NOTE: Be sure to read all of the steps involved before begin-
ning any of the procedures in this manual.
NOTE: After repairing or replacing a component run the unit for
20 minutes, check the oxygen concentration and test for leaks.
Test for leaks using a certified leak detection solution such as
Epi-SEAL
®
LEAK-SEEK
®
.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.
WARNING: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 elimi-
nate the possibility of tape particles entering the oxy-
gen system. LOX-8™ sealant may be used in place of
Teflon tape.
WARNING: Electric shock hazard. Do not remove
cabinet.The cabinet should only be removed by a qual-
ified Sunrise Medical homecare provider.
WARNING: 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.
CABINET REMOVAL
To remove the front and back cabinets (Figures 2 and 3):
1. Ensure the unit is unplugged from the wall outlet.
2. Using a screwdriver, remove the six screws that hold the back
cabinet to the internal structure and the bib.
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.
The majority of all the servicing and repairs can be done with-
out removing the front bib. However, to gain access to the
components behind the bib, it may be loosened or removed.
To loosen the bib (Figure 4):
1. Remove the two screws (located directly above the hour
meter) that hold the bib to the unit’s internal structure.This
will allow access to the components behind the bib.
To remove the bib completely (Figure 8):
1. Remove the two screws as above.
2. Disconnect the ribbon connector from the PC board.
3. Disconnect the lines from the power switch and circuit break-
er. Mark these wires accordingly.
4. Tilt the top of the bib forward to release it from the slot in
the body of the concentrator.
5. Remove the hose connected to the bottom of the flow meter.
To reassemble bib:
1. Reconnect the wires and hose.
2. Insert the bib tab into the slot above the four-way valve, and
push until it snaps into place.
3. Secure bib with two screws.
Teflon® is a registered trademark of DuPont.
LOX-8™ is a trademark of Fluoramics, Inc.
Epi-Seal® Leak-Seek® is a registered trademark of Bonded Products, Inc.
COMPONENT TESTING, REPAIR, AND REPLACEMENT
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