Replacing Pilot Assembly - Invacare Perfecto2 IRC5PO2AW Service Manual

Invacare® Perfecto₂™ Oxygen Concentrator
6. Remove the "F" tube from the 4 way valve/manifold assembly.
Using a hose clamp tool, remove the clamps F that secure the tubes G to the 4-way valve/manifold assembly.
7.
8. Remove the tubes from both sides of the 4 way valve/manifold assembly.
9. Note the orientation of the 4-way valve/manifold assembly before removing for correct re-installation.
10. Lift 4-way valve/manifold assembly up and out of the base of the concentrator.
11. Disconnect spade connectors located on the side of the 4 -way valve assembly (Not shown).
12. Remove the four mounting screws H that secure the 4-way valve/manifold assembly together.
13. Replace the necessary 4-way valve I, manifold J or both.
14. Loosely install mounting screws through 4-way valve .
Ensure the manifold gasket is in place on 4-way valve before installing.
CAUTION!
Risk of Damage
To avoid damage to the 4-way valve
– Adhere to Torque sequence and specification.
15. Align the 4-way valve with the manifold assembly.
16. Tighten mounting screws in the sequence described above.
17. Pre-torque the mounting screws to 10 ± 2 in-lbs using the torque sequence.
18. The mounting screws can now be torqued to 22 ± 2 in-lbs in the same sequence.
19. Connect spade connectors located on the side of the 4 -way valve assembly.
20. Position the 4-way valve/manifold assembly in the base of the concentrator on the foam block in the orientation noted in STEP 9.
21. Slide the tubes onto each side of the manifold/valve assembly.
22. Using a hose clamp tool, secure the tubes to the 4-way valve/manifold assembly with the clamps.
23. Install the "F" tube into the 4-way valve/manifold assembly.
24. Secure the "F" tube to the 4 way valve/manifold assembly with two tie wraps.
25. Install the manifold exhaust tube into the "F" tube.
26. Secure the manifold exhaust tube to the "F" tube with a tie wrap.
27. Reinstall cabinet. Refer to 6.1 Removing Cabinet, page 17 and reverse all steps.

6.18 Replacing Pilot Assembly

DANGER!
Risk of Death, Injury, or Damage
To prevent electrical shock
– ,ALWAYS disconnect concentrator from electrical outlet before servicing.
CEME pilot assembly replaces in the same manner.
1. Turn power Off (O) and unplug the unit.
2. Remove cabinet. Refer to 6.1 Removing Cabinet, page 17.
3. Remove the 4-way valve/manifold assembly. Refer to 6.17 Replacing 4-Way Valve and/or Manifold Assembly, page 37.
Locate pilot valve A on 4-way valve/manifold assembly.
4.
5. Hold pilot valve stem B with the flat blade screwdriver and turn the 9/16-inch locknut C counterclockwise one complete turn.
6. Unscrew the pilot valve stem assembly from the manifold D while leaving the coil E with yoke F and locknut intact on stem.
7. Remove pilot valve assembly J and discard.
WARNING!
Risk of Injury or Damage
Damage to the plastic manifold and/or plastic manifold airflow passage I may occur. Damage to airflow may result in improper
oxygen delivery and harm to the user. To avoid:
– DO NOT use sharp tools to remove O-ring G from plastic manifold opening H.
Remove O-ring G from manifold opening.
8.
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