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Starting and Stopping Treatment
Warming your H4i
The Warm-Up feature (not available on all ResMed PAP devices) is used to pre-heat
the water before starting treatment. Skip this step if you want to start immediately.
To start the Warm-Up feature:
1 Select warmup by pressing on the control panel.
2 The WARMING screen will appear to indicate that the Warm-Up feature is activated.
3 While your H4i is in Warm-Up mode you can:
• Start treatment at any time by pressing .
• Access the menus by pressing .
• Stop the Warm-Up feature at any time by pressing . (This may not apply
on all devices.)
The Warm-Up feature will automatically turn off after 30 minutes if treatment has not
started.
Starting your treatment
1 Turn the humidity control dial to three ( ). You can adjust the control dial up or down
at any time to find the setting that is most comfortable for you. The setting
switches heated humidification off and delivers minimum humidification while a
setting of six ( ) delivers maximum humidification.
Note: The ResMed Tubing Wrap is designed to enhance comfort by maximizing
heat retention along the air tube.
2
Fit your mask as described in your mask user instructions.
3
Press on the control panel to begin therapy.
Note: The H4i is thermostatically controlled to maintain a constant temperature. The
indicator light will brighten to indicate when the device is actively heating and dim
when it has reached its set temperature.
4
Lie down and arrange the tubing so that it moves freely when you turn in your sleep.
!
WARNING
Do not leave an excessive length of air tubing around the top of your bed. It
could twist around your head or neck while you are sleeping.
Stopping your treatment
To stop your treatment, remove your mask and press .
Note: In order to assist the heater plate in cooling, some flow generators continue to
blow air gently for up to an hour after treatment has stopped. However, you can
unplug the device from the power outlet at any time and allow the heater plate to
cool without airflow.