Replacing Check Valves - Invacare Perfecto2 IRC5PO2AW Service Manual

Invacare® Perfecto₂™ Oxygen Concentrator

6.6 Replacing Check Valves

DANGER!
Risk of Death, Injury, or Damage
To prevent electrical shock
– ALWAYS disconnect concentrator from electrical outlet before servicing.
Product Tank with Regulator Manufactured Before 7/1/12
Only the VAW model is show for clarity. The product tank replaces in the same manner for the AW model.
PE Valve is not shown.
Replace both check valves when performing this procedure. The check valves are one way directional and can be checked by passing air
through them. Air should flow in one direction only.
1. Turn power Off (O) and unplug the unit.
2. Remove cabinet. Refer to 6.1 Removing Cabinet, page 17.
3. It may be necessary to remove the compressor HEPA inlet filer. Refer to 5.4 Replacing the Compressor Inlet HEPA Filter, page 13.
Remove tie-wrap A securing the lower ¼-inch tubing B to the product tank C.
4.
Remove the tie-wrap (not shown) securing the upper ¼-inch tubing D to the barb on the sieve bed (not shown).
5.
WARNING!
Risk of Injury or Damage
Low system pressures and eventual bed contamination will result if check valves are not properly installed.
– The check valves are one-way directional and MUST be installed correctly.
– The check valves must be installed with the black end of the valve facing the product tank.
CAUTION!
Risk of Damage
The regulator outlet tubing E is identified by the flow arrow F on the side of the regulator G which points to it.
– DO NOT put a check valve on the regulator outlet tubing.
Position the check valve assembly H so the black side of the valve is facing the underside of the check valve to ensure proper orientation.
6.
7. Use two tie-wraps (not shown) to secure the ¼-inch tubing to the product tank and to the barb on the sieve bed where previously removed.
Ensure check valves are not crossed. Left barb product tank check valve goes to left barb on sieve bed. Right barb product tank
check valve to right barb on sieve bed.
26
Product Tank with Regulator Manufactured After 7/1/12
D
H
B
A
E
G
F
C
1154245-F-02