4.3. Maintenance
NO INTERNAL MAINTENANCE
IS REQUIRED OR SHOULD BE
PERFORMED.
OPENING THE CASE WILL
VOID THE WARRANTY.
5. USEFUL INFORMATION
5.1. Accessories and spare parts
The accessories used with the
O2 concentrator
must:
•
be oxygen compatible.
•
be biocompatible.
The connectors, tubes must be designed for
oxygen usage.
5.2. Materials in direct or indirect contact
with the product output
Concentrator casing ................................ABS
Power Cord ........................................... PVC
Cabinet Air Filter ..............................Polyester
I
/0
(On/Off) switch................................Nylon
Casters....................................................Nylon
Oxygen product outlet ...................Aluminum
Printed labels.............................Polycarbonate
Pipe/Tubing..........................Aluminium,PVC,
polyurethane or silicone
5.3. Operating principle
The compressor sends filtered room air to a
solenoid valve, which allows compressed air to
pass to the column in production. The columns
contain a molecular sieve, whose function is to
adsorb the nitrogen and thus allow oxygen to pass.
The oxygen enriched product is then directed
through a pressure reducing valve continuing
to the oxygen product outlet fitting.
During this time, the column which is being
"regenerated" is connected to the ambient air
and flow of oxygen enriched product is passed
through it (from the column "in production"). In
this way, when one column is in production, the
other is in a nitrogen desorption or "regenera-
tion" phase. The oxygen enriched product finally
passes through a final product filter located prior
to the oxygen outlet fitting.
5.4. Alarms - Safety devices - Indications
5.4.1. Alarms
•
No voltage detection
In the event of a loss of mains power, an inter
-
mittent audible alarm is activated and the green
light turns off. Test alarm by actuating the
I
/
O
(ON/OFF) switch when the power cord is not
plugged into the wall outlet.
