ResMed Quattro Air NV User Manual page 14

The Quattro Air NV has a standard female 22mm tapered fitting for
external connection to the ventilator.
Use a standard conical connector if pressure readings and/or
supplemental oxygen are required.
Fitting
1. Remove the elbow from the mask by pressing the side buttons and
pulling the elbow away.
2. With both lower headgear straps released, hold the mask against your
face and pull the headgear over your head. Ensure that the label on
the back of the headgear faces outwards when the headgear is
put on.
3. Undo the fastening tabs on the upper headgear straps. Pull the straps
evenly until the mask is stable and positioned as shown in the
illustrations. Reattach the fastening tabs.
4. Bring the lower straps below your ears. Loop the headgear onto the
frame and clip the quick release together.
5. Undo the fastening tabs on the lower headgear straps. Pull the straps
evenly until the mask sits firmly on the chin and reattach the fastening
tabs.
6. Start ventilation, then connect the air tubing from your device to the
elbow. Attach the elbow to the mask by pressing the side buttons and
pushing the elbow into the mask.
7. Undo the fastening tabs on the upper headgear straps. Readjust the
straps evenly only enough that a seal is achieved and reattach the
fastening tabs. Overtightening may cause leaks.
8. Your mask and headgear should be positioned as shown.
Removing your mask
There are two ways to remove your mask.
Removing your mask normally
1. Unclip the quick release from the frame by pinching the buttons on
the sides. You can also remove the lower headgear strap from the
hook.
2. Pull the mask away from your face and back over your head.
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