9
MAINTENANCE
b. The concentrator must operate for a minimum of 20 min-
utes before checking the oxygen concentration.
c. Connect the analyzer to the unit’s oxygen outlet port
(Figure
1) and wait until the display stabilizes.
d. Record the reading.
2. Check the audible alarm and indicator lights every two years.
When the power switch is turned “On,” listen for the audible
alarm and check to see if the front panel indicator lights are
operating.
3. Change intake filter as follows:
a. Extended life intake bacteria filter (part # MC44D-605) -
Inspect once a year. Change as necessary, not to exceed
8760 hours.
b. Round felt pre-filter (part # 444-503) - change once a
month. –OR– Rectangular felt pre-filter (part # MC44D-
722) - change every 3 monthes,AND
c. Intake bacteria filter (part # 444-504) - change every six
months.
d. Open the filter door and replace filters as required.
4. Change the final bacteria filter (part #PV5LD-65
1) every
two years.
a. Unplug the unit, remove the cabinet, and loosen the bib.
b. Remove the hose from each end of the filter (Figure 8)
and discard the filter.
c. Install the new final bacteria filter with the “IN” fitting
toward the flow meter.
d. Tighten the bib and replace the cabinet.
5. Check the system performance every two years of operation
by measuring the accumulator pressure swing. Use the accu-
mulator pressure test described in the chapter “Component
Testing, Repair and Replacement.”
6. Change the compressor HEPA filter—every five years or
25,000 hours of operation (whichever comes first).
a. Unplug the unit and remove the rear cabinet.
b. Loosen the hose clamp and remove the hose from the
outlet fitting end of the HEPA filter (Figure 4).
c. Using a wrench, unscrew the HEPA filter from the com-
pressor head outlet fitting.
CAUTION: Use a second wrench to prevent twist-
ing of the brass angle fitting screwed into the out-
let port of the compressor.
d. Discard the HEPA filter.
NOTE: Teflon
®
tape or LOX-8
®
paste should be applied to
the compressor fitting omitting the first thread, prior to
installation of the HEPA filter.
e. Install the new HEPA filter by using a wrench to attach the
filter to the compressor head outlet fitting.
CAUTION: Use a second wrench to prevent twist-
ing of the brass angle fitting screwed into the out-
let port of the compressor.
NOTE:
Make sure the filter end marked “IN” is toward
the compressor.
f. Attach the hose to the outlet fitting end of the filter and
secure with a hose clamp.
7. Leak test the HEPA filter fittings.Apply a leak test solution
such as Epi-SEAL
®
LEAK-SEEK
®
to fittings and connections
with the unit running. If an air leak is present, the solution
will bubble.
The Preventative Maintenance Schedule stated above reflects a
normal, clean operating environment.The homecare provider
is responsible for determining the condition of the concentra-
tor operating environment and determining a preventative
maintenance interval frequency.
NOTE: This PM Schedule reflects:
• 5000 hour usage equal to one year
• a normal, clean operating environment.
The homecare provider is responsible for:
• determining the condition of the concentrator operating
environment.
• determining a preventative maintenance interval frequency
(not to exceed the schedule stated above which takes into
consideration the specific operating environment).
BETWEEN PATIENT MAINTENANCE
1. Discard oxygen tubing, cannula & humidifier bottle.
2. Discard intake bacteria filter and felt pre-filter (if using these
filters instead of the extended life intake bacteria filter).
3. Wash or replace the cabinet air filter.
4. Wash the concentrator cabinet.
5. Check oxygen concentration. If the unit falls within specifica-
tion, the extended life intake bacteria filter does not need to
be replaced between patients.
PREVENTATIVE MAINTENANCE SUMMARY
Patient
Daily Clean the humidifier bottle (if used).
Weekly Clean air filter on back of unit.
Clean exterior of cabinet.
Other Clean and replace cannula/mask and tubing as
instructed by manufacturer.
Homecare Provider
Change intake filter as necessary following require-
ments in step 3.
3 months Check oxygen concentration on non-OSD units.
Check the concentrator environment, and set a
maintenance interval of less than 3 months if
required.
2 years Check audible alarm and indicator lights.
Change final bacteria filter.
Check system performance.
Check oxygen concentration on OSD units.
5 years Change compressor HEPA filter
(change in 25,000 hours or earlier).
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