ResMed VS III User Manual page 14

Expiratory valve tube
Figure 9: Connecting a single circuit with expiratory valve and pressure line
Once your circuit is connected to the device, you can connect the mask
to the other end of the circuit.
Option 3 – Double circuit
1. Firmly connect one limb of the circuit to the air outlet
2. Then connect the other limb
Figure 10: Connecting a double circuit
10
2
P
3
Pressure line tube
Symbol
identifying
air return
Expiratory valve control
1
2
Pressure line
P
(Prox. P .)
.
1
2
3
Symbol
identifying
air outlet
.