Precision Medical PM4150 EasyPulse Portable Oxygen Concentrator (POC) - Manual (Page 12)

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Sieve Bed Assembly Replacement (505849):
Tools and equipment required:
#1 Phillips screwdriver
Small diagonal wire cutters
Needle nose pliers
3/16” (15mm) ID silicone tubing x 6 inch (15 cm) long (minimum)
Disassembly
1. Disconnect the POC from any external power source.
2. Ensure the device is set to the off position.
3. Lay the POC on to its front with the handle away from you.
4. Using a #1 Phillips screwdriver, remove the four screws from the
back cover and set aside.
5. Remove the Back Cover by lifting up and off the Sieve Bed
Assembly, set it aside as shown.
6. Stand the POC up. Remove the tubing clip from the right large
Sieve Bed Tube as shown below.
7. Using diagonal cutters carefully cut the Cable Ties securing the
two (2) large Sieve Bed Tubes to the Sieve Bed Assembly as
shown below and discard the old cable ties.
8. Carefully remove the two (2) large diameter Tubes from the Sieve Bed assembly.
9. Using the diagonal cutters cut the Cable Tie on the Tube connecting the Sieve Bed Assembly to the ‘Y’ Connecter
(as shown above) and remove the Tube from the ‘Y’ Connector.
STOP! From this point you must follow Electrostatic Discharge procedures to avoid damage to the electronic
components.