AirSep MN105-1 C - Manual (Page 21)

AirSep ® Corporation
NewLife ® Elite Service Manual
5.2.6 Caster Replacement
1 Remove the cabinet panels to expose the caster nut.
2 Remove the caster nut with a 9/16-inch socket.
Use an extension for the two front caster nut removals.
3 Install the new caster and washer, and tighten the nut.
4 Reconnect the cabinet panels.
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.
Two different aspects of the compressor cause concern: the output and the sound
level.
 Output
Compressor output refers to how much compressed air the com pressor
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 unit as long as
that unit’s oxygen concentration level at the prescribed liter flow rate
is within AirSep’s specifications. Refer to Section 2.4.
 Sound Level
The condition of the compressor’s bearings mainly determine its sound
level.
There are four bearings located within the compressor that allow the
inner components of the compressor to rotate. If the bearings wear to
the point that they become noisy, the compressor becomes noticeably
loud and needs servicing.
5-2