Invacare Perfecto 2 Series Service Manual page 87

4. Check each connection to make sure it is tight.
5. Turn the concentrator On ( ).
NOTE: Adjust the concentrator to MAXIMUM rated liter flow to 5 L/min.
NOTE: Wait approximately five minutes to allow system pressures to achieve proper equilibrium
before testing.
6. The pressure in the concentrator should rise within 20 seconds to 21 p.s.i.g. ± 0.3 and
shift the 4-way valve to the opposite sieve bed.
7. After the 4-way valve shift, the pressure in the concentrator will drop to 12 p.s.i.g. ± 2
before rising within 20 seconds to 21 p.s.i.g. ± 0.3 and shift the 4-way valve to the
opposite sieve bed.
8. If pressure reading is 21 p.s.i.g. ± 0.3 when both valve shifts are made, proceed to STEP
10.
9. If pressure in the concentrator does not fall into the specifications listed above, refer
to Troubleshooting on page 16.
10. Turn the concentrator off (O).
11. Disconnect pressure gauge from the HomeFill port and reinstall plug.
Plug
Part No 1148070
SECTION 25—SIEVE BED PRESSURE CHECK
Back of
Concentrator
HomeFill Port
FIGURE 25.2 Pressure Testing
87
Pressure
Gauge
¼ x 2-inch
Silicone Tubing
with Connector
™
Perfecto
2