AirSep MN138-1 H - Manual (Page 18)

12
MN138-1 Rev H
02/14
4.3.2 Capacitor Replacement
The capacitor starts the compressor. If the compressor cannot start, the capacitor may be
defective and require replacement. To replace the capacitor, follow the steps below:
1. Set the unit’s I/ 0 switch to the “0” position and unplug the power cord.
2. Remove front panel and locate capacitor.
3. Gently slide entire compressor enclosure towards you to allow easier access to the
capacitor. (Do not pull out enclosure too far as damage may occur to certain
components within concentrator).
4. Carefully disconnect both wire connections from the capacitor, slide capacitor out
from tie-wrap.
5. To install new capacitor, slide capacitor into the tie-wrap holding it in place, and
connect both wire connections to capacitor. Tie-wrap should be centered on
capacitor when properly installed.
6. Return compressor enclosure to its original position, reinstall front cover.
4.4 Solenoid Valves
The VisionAire uses five two-way solenoid valves: two feed, two waste, and one equalization.
Each valve has an open (energized) and closed (de-energized) position. As the VisionAire
operates, two or three valves are always energized. The solenoid valves of the VisionAire unit
require no scheduled maintenance.
4.4.1 Valve Manifold Replacement
Valve Manifold Removal
To remove the valve manifold, follow the steps below:
1. Set the unit’s I/ 0 switch to the “0” position and unplug the power cord.
2. Remove both front and back panels.
3. Remove the compressor assembly by following the compressor removal
procedure outlined under section 4.3.1.
4. Remove tubing attached to the exhaust muffler assembly. Do not remove muffler
assembly.
5. Disconnect small tubing from the in-line adaptor leading to the sensor located on
the circuit board.
6. Disconnect the wire connectors labeled AC Power and PowerSw from circuit
board. (If equipped with an O2 oxygen monitor, also disconnect wire connectors
labeled O2 LED and Sensor).
7. From back of unit, disconnect tubing connections at the equalization valve and
disconnect fittings from top of both sieve beds.
Temporarily seal sieve bed openings with tape to prevent the sieve material from
being exposed to the moisture in room air. Prolonged exposure to room air
results in contamination and permanent damage to the sieve material.
8. With adjusting compressor enclosure (alternating pulling out top and bottom),
gently remove the compressor enclosure from the center section of unit by sliding
it out through the front.
9. With the compressor enclosure completely removed, carefully remove all valve
retainer clips and coils from each valve stem. Wire connectors can remain