AirSep MN118-1 B - Manual (Page 16)

MN118-1 rev B
02/14
11
5.3 Compressor
The compressor is the “pump” within the oxygen concentrator that pushes the room air
into the bottom of the sieve beds. This allows oxygen to flow out of the top of the sieve
beds in the NewLife Intensity unit.
Two different aspects of the compressor cause concern: the output and the sound level.
Output
Compressor output refers to how much compressed air the compressor can produce. This
depends upon the model of the compressor, stroke size, bore size, and cup seal condition.
The cup seals form the seal between the piston and the cylinder wall. As the cup seals
wear, the compressor’s output begins to gradually decrease. This reduction in compressor
output results in less air for the sieve beds. Therefore, the production of oxygen decreases.
Since this drop in oxygen production occurs over a long period of time, preventative
maintenance on the compressor is not required. You can continue a patient’s therapy on
the NewLife Intensity unit as long as that unit’s oxygen concentration level at the
prescribed liter flow rate is within AirSep’s specifications.
Sound Level
The condition of the compressor’s cup seals, bearings, and other components can result in
an increased sound level. If the compressor’s cup seals or bearings wear to the point that
they become noisy, the concentrator may become noticeably louder; therefore, compressor
service or exchange may be required.
5.3.1 Compressor Replacement
Compressor Assembly Removal
To remove the compressor assembly, follow the steps below:
1. Set the unit’s I/ 0 switch to the “0” position and disconnect the power cord.
2. Remove the side and lower front panels of unit.
3. Disconnect the suction tube.
4. Disconnect the blue compressor lead at the terminal strip and the brown
lead at the temperature switch.
5. Disconnect the two leads to the capacitor and remove if necessary.
6. Disconnect the compression fitting for the heat exchanger located at the
bottom center of the compressor.
7. Remove the two screws that connect the compressor plate to the base of the
unit, and slide the compressor assembly up and out.
Compressor Assembly Installation
To install compressor assembly, follow the steps below:
1. Perform the compressor removal procedure in reverse order.
2. Make sure to position the compressor’s blue and brown lead wires behind
the braided suction tube.
3. Leak test all connections .