AirSep MN138-1 H - Manual (Page 12)

6
MN138-1 Rev H
02/14
2.0 Operational Check and Oxygen Concentration Test
2.1 Description of Operation
Air is drawn into the VisionAire Oxygen Concentrator. For overall, sound efficiency, before air
enters the compressor, it passes through the unit’s intake muffler. Pressurized air then exits the
compressor and moves to the valve manifold. The valve manifold incorporates the use of five
two-way solenoid valves which control the flow of air and oxygen in and out of the molecular
sieve beds. The unique property of molecular sieve enables it to physically attract (adsorb)
nitrogen when air passes through this material, thus producing high concentration oxygen.
There are two sieve beds: while one produces high concentration oxygen, the other is purged of
the nitrogen it adsorbed (collected) during this pressure swing adsorption (PSA) cycle. Each
adsorber produces oxygen and delivers it to the product tank. Oxygen exits the product tank
through a pressure regulator, flow control valve, flow meter, and finally exits the unit. The
VisionAire unit delivers up to 95.5% oxygen at the prescribed flow rate.
2.2 Operation Check
AirSep tests every VisionAire Oxygen Concentrator thoroughly after manufacture. You
must perform the following test to ensure that no damage occurred in shipping or handling.
Do not use extension cords with this unit or connect too many plugs into
the same electrical outlet. The use of extension cords could adversely affect
the performance of the device. Too many plugs into one outlet can result in
an overload to the electrical panel causing the breaker/fuse to activate or
fire if the breaker or fuse fails to operate.
1. Open and inspect all cartons (that contain units) upon delivery. Unpack the unit and
remove it from the carton. Inspect the unit itself for damage. If the exterior of a unit’s
carton is damaged, or the unit itself is damaged, note it on the freight bill signed by the
driver.
2. Plug in the power cord of the unit, and set the I /0 power switch to the “ I ” position. Check
to see that the following occurs:
a. A continuous alarm sounds for approximately four seconds. See the
troubleshooting chart in Section 5.0 of this manual if the unit’s alarm does
anything other than sound for four seconds.
b. The compressor runs and flow is indicated in flow meter.
c. OPTIONAL: The Oxygen Monitor’s amber light will remain on for four
minutes upon startup regardless of unit’s concentration. After four
minutes, the light will go out if the concentration level has reached
minimum concentration requirements.
d. Perform an oxygen concentration test, as described in Section 2.4.
2.3 Alarm System
The VisionAire Oxygen Concentrator is equipped with an alarm system, which sounds an
intermittent alarm when a power failure or other alarm condition occurs.
The intermittent alarm sounds are displayed in the following table: