DeVilbiss DeVO/MC44-90 - General Information; Initial Inspection; Maintaining the DeVO;MC44; Warnings and Hazards

SECTION 1
GENERAL INFORMATION
A. Initial Inspection
An Initial inspection should be performed on the
DeVO/MC44 as soon as possible after receipt.
After unpacking the concentrator, examine it for
any external damage that may have occurred
during shipment. !f damage has occurred, contact
the DeVilbiss international Department or your
dealer for specific instructions.
The concentrator should then be turned on and
operated for at least 30 minutes as outlined in
Section 3 of this manual. If the unit fails to
operate properly or internal damage is found
contact the DeVilbiss International Department
or your dealer.
B. Maintaining the DeVO/MC44
The DeVO/MC44 should be routinely serviced ac-
cording to the guidelines set forth in Section 4 of
the manual. Whenever routine servicing or repair
is required it should be performed by only
qualified service personnel. Failure to properly
maintain the unit may void the warranty.
C. Warnings/Hazards
Warning
Oxygen Promotes Rapid Burning. Do Not Smoke
When Using The DeVO/MC44 Or When Near A
Person Receiving Oxygen Therapy. Do Not Use
Near Hot, Sparking, Or Burning Objects.
Warning
Electrical Shock Hazard: The Cabinet May Only Be
Removed By A Qualified DeVilbiss Dealer.
D. General Description of the DeVO/MC44
The DeVilbiss DeVO/MC44 Oxygen Concentrator
is designed to deliver high concentrations of
oxygen for the patient requiring oxygen therapy
in the home or institution. It is capable of
providing 95% + 3% oxygen concentration at 1-
2,92% + 3% at 3 liters per minute, 80% + 3% at
4 liters per minute, and 70% + 3% at S liters per
minute. This is accomplished by using a process
similar to filtration.
Room air, which contains approximately 21%
oxygen and 78% nitrogen, is drawn into the
DeVO/MC44 by a compressor. The air passes
through a gross particle filter, a felt pre-filter, and
a high efficiency bacteria filter before entering
the compressor. The “WOB’L” type compressor
will produce clean oil free air and is cooled by air
flow from a cooling fan.
Leaving the compressor, the air passes through a
HEPA filter and a four-way directional valve that
directs the air into one of two cylinders contain-
ing molecular sieve material. This sieve material is
a synthetically produced inorganic silicate. It is
very porous, and has the unique quality of selec-
tively adsorbing nitrogen. This produces a high
concentration of oxygen for the patient.
Because the DeVO/MC44 has two molecular sieve
beds, it is able to pressurize one bed and
depressurize the other bed at the same time. This
allows the unit to cleanse the depressurized bed
of adsorbed nitrogen while the pressurized bed is
producing a high concentration of oxygen. This
process is alternated between the two beds
approximately every 16 seconds depending on
altitude and oxygen output flow rate. The cycling
assures the patient of a continuous supply of
oxygen.
The oxygen leaving the sieve beds is directed
through a check valve to an accumulator tank.
From here it passes through a pressure regulator,
flow meter, and a second high efficiency bacteria
filter before exiting at the outlet fitting. The flow
meter allows the oxygen flow to be controlled
and adjusted to the level prescribed by the
patient's physician.
Тре DeVO/MC44 incorporates an audible and
visible patient alert system as well as a self-
diagnostic service system to be used by service
personnel. This alert system will activate due to
power failure, low system pressure, and electrical
or pneumatic component failure.
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