AirSep Freestyle Service Manual download pdf (Page 13)

irSep Corp.

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FreeStyle Service Manual

2-1

2.0 Operation Check and Test of Oxygen Concentration

2.1 Description of Operation

Air enters the FreeStyle Oxygen Concentrator through an external air intake /

gross particle filter. This filtered air enters the compressor via a suction intake

muffler that quiets the compressor’s suction sound. Pressurized air then exits

the compressor and passes through a heat exchanger to reduce the

temperature.

Next, a two-way solenoid feed valve directs the air into one of two sieve beds

that contain molecular sieve. The unique property of molecular sieve enables

it to physically attract (adsorb) nitrogen when air passes through this material,

thereby separating the nitrogen from the oxygen in ambient air.

There are two sieve beds: While one produces high-concentration oxygen, the

other is purged of the nitrogen it adsorbed (collected) while it made oxygen.

Oxygen exits the product tank after first passing through the integrated

product filter.

In addition to the molecular sieve beds that allow oxygen to be separated from

air, FreeStyle contains an Oxygen Conserving Device (OCD) valve that

controls delivery of high-concentration oxygen to the patient at the point in

the breathing cycle when the patient starts to inhale.

FreeStyle delivers a gas consisting of 90% (+5.5/-3% )oxygen at pulse flow

rates from approximately 1–3 LPM equivalency.

2.2 Operation Check

AirSep tests every FreeStyle Oxygen Concentrator thoroughly after

manufacture. You must perform the following test to ensure that no damage

occurred in shipping or handling.

1. Connect the power cord of the unit, and turn the unit on by pressing

flow setting [-2]. Check to see that the following sequence occurs:

a. A brief, continuous alarm sounds to indicate that FreeStyle has been turned on.

b. The compressor runs.

c. After a 10 second start up is complete.

d. Exhaust air flows from the unit.

2. Perform an oxygen concentration test, as described in Section 2.4.

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AirSep Freestyle Service Manual Page 13