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 concen
-
trator 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 produc-
tion, the other is in a nitrogen desorption or
"regeneration" 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 in-
termittent 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.
