CAIRE HELiOS Marathon H850 Use Manual page 52

Accessories
WARNING
Do not attach an external flow control device that
can be set higher than ten liters per minute (lpm) to
your HELiOS reservoir.
Note:
Do not attach the reservoir oxygen supply line to the
external flow control device.
48 HELiOS Marathon
External Flow Control Device
Use of the external flow control device is based on your
physician's recommendation. It provides adjustable,
continuous flow direct to a single lumen cannula. If your
physician determines you need an external flow control
device, your oxygen supply company should provide it.
External Flow Control Device with Humidifier Bottle
The external flow control device may also come with a
humidifier bottle. This provides additional humidity to
keep the air you breathe moist. If your physician
recommends it, your oxygen supply company will
supply a humidifier bottle and single-lumen cannula to
use with the reservoir.
TM
H850 Portable Oxygen Unit Home Use Guide