Vyaire VELA, Service Manual

Page: 49 / 111

5-12
Chapter 5: One-Year P.M. Procedure
33373-001 Version A
NOTE
When replacing the 3v battery the Date and Time will have to be reset in the Extended Functions
screen.
5.4.11 Replacing the Oxygen Sensor
1. Remove the Inlet Filter screen as per directions in Chapter 3.
2. Disconnect the Oxygen Sensor connector from the ventilator connector.
3. Pull out the Oxygen Sensor.
4. Push the new Oxygen Sensor into the sensor orifice in the back of the manifold.
5. Connect the Oxygen Sensor connector to the ventilator connector.
6. Replace the Inlet Filter Screen as per directions in Chapter 3.
7. Calibrate the Oxygen Sensor as per directions in Chapter 6.
5.4.12 Replacing the blender regulator and blender screws
1. Using directions in Chapter 3: Disassembly and Reassembly, remove rear inlet filter screen and
the blender from the unit.
2. Gently lift the blender up from the manifold base, this will disconnect the diffuser tubing
connected to the flow port on the bottom of the blender. There will be a tube going from the
nebulizer port on the front panel to the nebulizer solenoid on the blender, this tube is to remain
connected.
3. Carefully hold the blender at angle to access the black regulator on the bottom of the blender.
Remove the two Phillips screws securing the regulator to the blender.
4. Remove the regulator and discard.
5. Locate the new regulator, P/N 33030A and locate the notch pointing to #1 on the regulator (see
Figure 5-20).
Figure 5-20. Notch on 40 psi Regulator
6. Align the regulator so that the notch is facing the three holes on the bottom of the blender (see
Figure 5-21).