MN220-1 B 66
Portable Oxygen Concentrator
It may not be necessary to completely remove the PSA system assembly to
replace the solenoid valve(s). The Feed B/Waste B and OCD valve will
require the PSA system to be partially removed.
1.
Remove the back cover panel.
2.
Determine which valve needs to be replaced. (Reference the PRESSURE PROFILE and
TROUBLESHOOTING sections of this manual for more information)
3.
Remove the tie wraps that bundle the valve wires.
4.
Carefully disconnect the Molex connector from the circuit board by pulling on the Molex
connector, not the valve wires.
5.
Using a small Philips screwdriver, remove the two screws fastening the valve.
6.
Remove the valve.
7.
Fasten the new valve using the two screws provided.
8.
Re-bundle wires and tie-wrap.
9.
Start the unit and leak test around the area where the gasket is located on the valve.
SIEVE BED REPLACEMENT
1.
Remove the PSA system assembly per the PSA REMOVAL section in this manual.
2.
Loosen and remove the center bolt from the PSA assembly using a 5/32” Allen wrench.
3.
While holding the adsorbent beds, gently pull up on the product manifold to remove it.
