Replacing Heat Exchanger Assembly - Invacare Perfecto2 IRC5PO2AW Service Manual

Invacare® Perfecto₂™ Oxygen Concentrator
7. Perform one of the following:
a. Regulators before 07/01/12 (Sensored) or 09/01/12 (Non-Sensored) - Insert a 5/32- inch Allen wrench into the pressure adjustment screw.
b. Regulators after 06/30/12 (Sensored) or 08/31/12 (Non-Sensored) - Insert a 3/32 (2.5 mm) Allen wrench into the pressure adjustment
screw.
8. While reading pressure gauge, do one of the following:
•
Turn pressure adjustment screw clockwise to increase output pressure; or
•
Turn pressure adjustment screw counterclockwise to decrease output pressure.
9. Adjust until pressure reads a steady 34.5 kPa ± 3.45 kPa (5 psi ± 0.5 psi).
10. Allow the concentrator to run for ten minutes.
11. Retest the pressure by performing STEPS 6-9, to ensure proper operation.
12. Once required pressure is achieved, reinstall cabinet. Refer to 6.1 Removing Cabinet, page 17 and reverse all steps.
13. Refer to 9.1 Troubleshooting, page 48 if you are unable to adjust or maintain 34.5 kPa ± 3.45 kPa (5 psi ± 0.5 psi).

6.9 Replacing Heat Exchanger Assembly

DANGER!
Risk of Death, Injury, or Damage
To prevent electrical shock
– ALWAYS disconnect concentrator from electrical outlet before servicing.
Only VAW model is shown. AW model is replaced in the same manner.
PE valve not shown in both views. Filter not shown in rear view..
1. Turn power Off (O) and unplug the unit.
2. Remove cabinet. Refer to 6.1 Removing Cabinet, page 17.
CAUTION!
– Use care not to deform heat exchanger when installing, removing or cleaning.
Disconnect brass nut A that secures the heat exchanger assembly B to the compressor C.
3.
4. On the backside of the Perfecto
the manifold assembly.
Remove heat exchanger assembly by pulling tube through sound box G.
5.
6. Reverse STEPS 3-5 to install new heat exchanger.
7. Run unit and check for leaks. Refer to 8.1 Leak Test, page 41.
8. If no leaks detected, turn power Off (O) and unplug the unit.
9. Reinstall cabinet. Refer to 6.1 Removing Cabinet, page 17 and reverse all steps.
28
, loosen the clamp D that secures the tube E to the manifold assembly F and remove the tube from
2
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