Between Patient Maintenance - Sunrise Medical DeVilbiss 505DZ Service Manual

Rear cover
Bib
Grommet
Figure 13
To change the final bacteria filter (Figure 14):
1. Unplug the unit and remove the cabinet.
2. Remove the hose from each end of the filter.
3. Discard the filter.
4. Install the new final bacteria filter with "IN" fitting
toward flow meter.
E. Recommended cycle time check - every two years or
10,000 hours of operation (whichever comes first).
Monitor the unit cycle times (using SMART Track or a stop
watch) and if longer than normal cycle times exist with no
leaks, inspect and change internal components as needed.
Refer to specifications for normal cycle times.
F. Change compressor HEPA filter - every five years or
25,000 hours of operation (whichever comes first).
To replace the compressor HEPA filter:
1. Unplug the unit and remove only the rear cabinet.
2. Loosen hose clamp and remove the hose from the
outlet fitting end of the HEPA filter.
3. Using a wrench, unscrew the HEPA filter from the
compressor head.
4. Discard the HEPA filter.
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NOTE – Teflon tape or LOX-8™ paste should be applied to
the compressor fitting omitting the first thread, prior to installa-
tion of the HEPA filter.
5. Install the new HEPA filter by using a wrench to
attach the filter to the compressor head until tight.
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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.
M A I N T E N A N C E
NOTE – Make sure the filter end marked "IN" is toward
compressor.
Filter door
*
Air filter
Extended
life intake
bacteria
filter
Flow
meter
knob
Flow
meter

Between Patient Maintenance

A.
B.
C. Check oxygen concentration. If the unit falls within oxygen
14
6. Attach the hose to the outlet fitting end of the filter
and secure with hose clamp.
7. Leak test the HEPA filter fittings. Apply the leak test
solution (such as Epi-Seal
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 concentrator operating environment and
determining a preventative maintenance interval frequency
(not to exceed three months on non-OSD models or two
years on OSD models) which takes into consideration the
specific operating environment.
Bib
Brackets/nuts
Figure 14
Discard oxygen tubing, cannula, humidifier bottle, intake
bacteria filter and felt pre-filter (if using these filters instead
of the extended life intake bacteria filter).
Wash or replace the air filter.
specification, the extended life intake bacteria filter does
not need to be replaced between patients (but must be
changed annually).
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LEAK-SEEK ) to fittings
Hose
Final bacteria filter