ResMed Positive AirwAy Pressure Device S8 Auto 25 User manual

S8™ Auto 25
Positive AirwAy Pressure device
User Guide
English

English
S8™ Auto 25
POSITIVE AIRWAY PRESSURE DEVICE
User Guide
English
ResMed Ltd (Manufacturer) 1 Elizabeth Macarthur Drive Bella Vista NSW 2153 Australia
ResMed Corp (US Designated Agent) 14040 Danielson Street Poway CA 92064-6857 USA
ResMed (UK) Ltd (EU Authorised Representative) 96 Milton Park Abingdon Oxfordshire OX14 4RY UK
ResMed Offices Australia, Austria, Belgium, Brazil, China, Finland, France, Germany, Greece, Hong Kong, India, Ireland, Italy, Japan, Malaysia,
Mexico, Netherlands, New Zealand, Norway, Portugal, Singapore, South Africa, Spain, Sweden, Switzerland, UK, USA (see www.resmed.com
for contact details).
Protected by patents: AU 691200, AU 697652, AU 699726, AU 702820, AU 709279, AU 713679, AU 724589, AU 764761, EP 0651971, EP 0661071,
EP 0858352, EP 0920845, EP 0927538, EP 0934723, JP 3638613, US 5199424, US 5245995, US 5522382, US 5704345, US 6138675, US 6213119,
US 6240921, US 6363933, US 6367474, US 6425395, US 6502572, US 6591834, US 6675797, US 6705315, US 6745768, US 6817361, US 6988498,
US 7040317, US 7100608. Other patents pending.
Protected by design registrations: AU 302180, AU 302181, AU 302182, AU 302183, AU 302184, AU 302185, AU 302186, CN 200430121211.8,
CN 200430121212.2, CN 200430121213.7, CN 200430121214.1, CN 200430121215.6, CN 200430121216.0, CN 200430121217.5, EU 269436,
HK 0412901.9, JP 1248040, JP 1257662, JP 1257663, JP 1266956, JP 1266957, JP 1267270, JP 1267271, NZ 405614, NZ 406923, NZ 406924,
NZ 406925, NZ 406926, NZ 406927, NZ 406928, US D544598, US D557406, US D557407, US D560795, US D561891. Other designs pending.
S8 is a trademark of ResMed Ltd.
© 2008 ResMed Ltd. 268223-Eng/1 08 09

Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Contraindications 1
Adverse Effects 1
The S8 Auto 25 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Masks 2
Humidifier 2
ResScan Data Card 2
Using the S8 Auto 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Setting up your S8 3
Attaching a H4i Humidifier 4
How to Use the Control Panel 4
Using the Menus 4
SmartStart™ 6
Starting Treatment 7
Stopping Treatment 7
Using the Mask-Fitting feature 7
Reminders on the S8 LCD 8
Smart Data™ 8
Using the Data Card 9
Cleaning and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Daily 10
Weekly 10
Monthly 10
Replacing the Air Filter 11
Servicing 11
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Symbols Which Appear On The Device 15
General Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1Introduction
English
Introduction
The S8TM Auto 25 self adjusting sleep apnoea system is indicated for the treatment
of obstructive sleep apnoea (OSA) in patients > 30 kg. The S8 Auto 25 is intended for
home and hospital use.
Contraindications
The S8 Auto 25 is not a life support device and may stop operating during power
failure or certain fault conditions. It should not be used by patients who are
dependent on continuous therapy.
Positive airway pressure therapy may be contraindicated in some patients with the
following pre-existing conditions:
•severe bullous lung disease
•pneumothorax
•pathologically low blood pressure
•dehydration
•cerebrospinal fluid leak, recent cranial surgery or trauma.
Adverse Effects
Patients should report unusual chest pain, severe headache or increased
breathlessness to their prescribing physician. An acute upper respiratory tract
infection may require temporary discontinuation of treatment.
The following side effects may arise during the course of therapy with the device:
•drying of the nose, mouth or throat
•nosebleed
•bloating
•ear or sinus discomfort
•eye irritation
•skin rashes.
!
WARNING
Read the entire manual before using this S8 device.
The S8 Auto 25 System
The S8 Auto 25 has two treatment modes, CPAP and VAuto, and comprises the
following elements:
•S8 Auto 25 device
•2 m air tubing
•Power cord
•Travel bag
•ResScan™ Data Card.
Optional components include:
•3 m air tubing
•DC/DC Converter 24V/50W.

2
Masks
The following ResMed mask systems are recommended for use with this device:
For information on using masks, see your mask manual. For the latest available
masks, see www.resmed.com.
Humidifier
If you are experiencing dryness of the nose, throat or mouth, the H4i heated
humidifier is recommended for use with the S8 Auto 25.
!
WARNING
•Only ResMed mask systems have been validated for use with this S8 device.
•Only the H4i is compatible for use with this S8 device.
ResScan Data Card
The ResScan Data Card may be used with the S8 Auto 25 to help your clinician
monitor your treatment or to provide you with updates to your device settings.
Screen
Keypad
Air outlet DC
AC
Air inlet
Data Card
module
Carry handle
Mask Type Name
Nasal Masks • Mirage Vista™ Nasal Mask
• Ultra Mirage™ Nasal Mask
• Ultra Mirage™ II Nasal Mask
• Mirage Activa™ Nasal Mask
• Mirage Micro™ Nasal Mask
Nasal Pillows Systems • Mirage Swift™ Nasal Pillows System
• Mirage Swift™ II Nasal Pillows System
• Swift™ LT Nasal Pillows System
Full Face Masks • Mirage™ Liberty Full Face Mask
• Mirage™ Quattro Full Face Mask
• Ultra Mirage™ Full Face Mask

3Using the S8 Auto 25
English
Using the S8 Auto 25
Setting up your S8
1Connect the power cord to the socket at the rear of your S8 Auto 25.
2Plug the other end of the power cord into the power outlet.
3Connect one end of the air tubing firmly onto the air outlet.
4Connect the assembled mask system to the free end of air tubing.
For information on assembling your mask, see your mask manual.
!
WARNING
•Make sure the power cord and plug are in good condition and the
equipment is not damaged.
•Only ResMed air tubing should be used with the device. A different type of
air tubing may alter the pressure you actually receive, reducing the
effectiveness of your treatment.
•Blocking the hose and/or air inlet of the device while in operation could lead
to overheating of the device.
!
CAUTION
•Be careful not to place the device where it can be bumped or where
someone is likely to trip over the power cord.
•If you put the device on the floor, make sure the area is free from dust and
clear of bedding, clothes or other objects that could block the air inlet.
1
2
34

4
Attaching a H4i Humidifier
The H4i humidifier attaches to the front of the S8 Auto 25 device to provide heated
humidification. This device automatically detects the presence of the H4i and no other
accessories are required for its use. For more information on using your H4i, please
refer to the H4i user guide.
!
WARNING
•Make sure that the water chamber is empty and thoroughly dried before
transporting the H4i.
•When using the travel bag, always separate the S8 unit and the H4i and
place the H4i in its pouch.
How to Use the Control Panel
The control panel of your S8 device includes an LCD screen which displays the
menus and treatment screens as well as a keypad for navigating through the menus
and delivering treatment. The keypad has the following keys:
LCD screen
Keypad
Start/Stop Key
Key Function
Start/Stop Starts or stops treatment. Extended hold for at least three seconds
starts the mask-fit feature.
Up Allows you to increase settings options and scroll through the
menu.
Down Allows you to decrease settings options and scroll through the
menu.
Left Performs the function indicated by the guiding text displayed above
it on the LCD screen. Guiding text includes menu, change, and
apply.
Right Performs the function indicated by the guiding text displayed above
it on the LCD screen. Guiding text includes exit and cancel.

5Using the S8 Auto 25
English
Using the Menus
The S8 Auto 25 provides a set of functions which are arranged in menus and
submenus. Via the LCD screen, the menus and submenus allow you to view and
change the settings for a particular function. To navigate and make selections:
1Press or to scroll through items within a level.
2Press to enter a submenu and to apply an option choice.
3Press to navigate out of a menu or submenu and to exit without changing
options.
Your clinician has preset the menu to either a standard view or a detailed view. The
following illustration summarises these views:
SETTLE: 10min
menu
WELCOME
>>>>>>
00006/00012 days
USED: 00090hrs
SW: SX459-0200
exit
MASK: ULTRA
change exit SETTINGS
enter exit
RESULTS
enter exit
enter exit
OPTIONS
TUBE LENGTH: 2m
change exit
S MARTSTART: OFF
exit
MASK: ULTRA
change exit
LEAK ALER T: ON
change exit
LANGUAGE:ENGLISH
change exit
SMART DATA
enter exit
enter exit
SERVICING
SW: SX459-0200
exit
SN: 20080102356
exit
AUTO APPEAR: ON
change exit
SMART DATA
enter exit
USED: 00090hrs
00003/00122days
MASK FIT: *****
excelnt exit
PRESSURE: 8.0
exit
USAGE: 4.00hrs
exit
EXHALATION
change
exit EXHALATION
change exit
VAuto mode
example
Standard View Detailed View
These menus only appear
if your clinician has
enabled Exhalation or
Smart Data.

6
How to Select the Mask Type
Scroll to MASK and select . Press or until you see the setting
you require. The following table shows the setting that should be selected for each
mask:
How to change the EPR level (CPAP mode)
Expiratory Pressure Relief (EPR) can be used to help ease any discomfort you may
experience when breathing out during treatment. If your clinician has allowed access
you can change the EPR level. There are four settings: OFF; 1 (lowest EPR); 2; and 3
(highest EPR).
1On the standby (RAMP) screen, press .
2Press until you see EPR LEVEL, then press .
3Press or until you see the setting that you require.
4Press to save the setting.
How to change the Exhalation rate (VAuto mode)
If enabled by the clinician, you can adjust the Exhalation rate so that the rate of
pressure drop is at a level that is most comfortable for you. There are three settings:
Fast; Medium; and Slow.
1On the standby (SETTLE) screen, press .
2Press until you see EXHALATION, then press .
3Press or until you see the setting that you require.
4Press to save the setting.
SmartStart™
If your clinician has enabled SmartStart/Stop, your device will start automatically
when you breathe into your mask and stop automatically when you take your mask
off.
Settings Mask
ULTRA Ultra Mirage Nasal Mask
Ultra Mirage II Nasal Mask
MIR FULL Mirage Liberty Full Face Mask
Mirage Quattro Full Face Mask
Ultra Mirage Full Face Mask
ACTIVA Mirage Activa Nasal Mask
SWIFT Mirage Swift Nasal Pillows System
Mirage Swift II Nasal Pillows System
Swift LT Nasal Pillows System
STANDARD Mirage Vista Nasal Mask
Mirage Micro Nasal Mask
MIRAGE Mirage Nasal Mask

7Using the S8 Auto 25
English
Starting Treatment
1Make sure the power is on.
The product name is displayed briefly on the LCD screen, then the standby (Ramp)
screen appears. The key and LCD backlights also turn on.
2Fit your mask as described in the mask user instructions.
!
WARNING
A mask should not be used unless your S8 Auto 25 is turned on and operating
properly.
3Alter the ramp time if required.
4To start therapy, simply breathe into the mask or press .
5Lie down and arrange the air tubing so that it is free to move if you turn in your sleep.
6After starting therapy, an introductory treatment screen will display:
Stopping Treatment
To stop treatment at any time, remove your mask and press . If your clinician
has enabled SmartStart/Stop, simply remove your mask and treatment will end.
Note: SmartStart/Stop does not operate if:
•you have a Full Face Mask; or
•Leak Alert is enabled.
Using the Mask-Fitting feature
The S8 Auto 25 includes a mask-fitting feature to help you fit your mask properly. The
mask-fitting feature delivers air pressure for a three-minute period, prior to starting
treatment, for checking and adjusting your mask fit to minimise leaks.
To use the mask-fitting feature:
1Fit your mask as described in the mask user instructions.
2Hold down for at least three seconds until air pressure delivery starts and
the following screen appears:
LK: 10L/min RR: 15
MV: 10.2 VT: 680
VA:SETL 4.0-10.0
A>>>> PS 6.0
S**TiMn TiMx 2.0
Ti 1.5s 1: 1.6
SpO2: 98%
HR : 60 exit
This screen only displays if
ResLink and an oximeter are
connected
Inspiration information
Leak and breath information
Mode and pressure display
VAuto
mode
example
Mask-fit star rating
MASK FIT:
excelnt
*****

8
The LCD displays a mask-fit star rating from zero to five stars. Three to five stars
indicates a good fit or better. Zero to two stars indicates that the mask needs to be
adjusted.
Reminders on the S8 LCD
Your clinician may have set your S8 Auto 25 to remind you about important events,
such as when to replace your mask, when to insert your Data Card and so on.
The reminder message is displayed on the LCD and is visible if the device is not
delivering therapy. The backlight on the LCD flashes when a message is displayed.
Your clinician can set any of the following reminders on your LCD:
Smart Data™
Smart Data menus only appear if enabled by the clinician. Your clinician can set any
of the following Smart Data options:
Message Description Action
INSERT
CARD
May appear if your device is
Data Card enabled.
Insert your Data Card and follow any
instructions that your clinician has given you.
When you have done this, the message will
disappear from the LCD. Pressing (Ok)
will also remove the message.
REPLACE
MASK
Reminds you that your mask
is due for replacement.
Press (Ok) to remove the message
from your LCD and replace your mask with a
new one.
CALL
PROVIDER
Reminds you to contact your
clinician; for example to
discuss your therapy.
Press (Ok) to remove the message
from your LCD and contact your clinician/
service provider.
REPLACE
FILTER
Reminds you to replace the
air filter on your device.
Press (Ok) to remove the message
from your LCD and replace the air filter.
SERVICE
DUE
Reminds you to return your
device for service.
Press (Ok) to remove the message
from your LCD and contact your clinician/
service provider.
Customised
messages
Your clinician may also set
reminders for other reasons;
for example to call a
particular person or number.
Press (Ok) to remove the message
from your LCD and contact your clinician/
service provider.
Message Description
PRESSURE Displays the therapy pressure from the previous session.
MASK FIT Displays the mask-fit star rating from the previous session.
USAGE Displays the usage hours from the previous session.
AUTO APPEAR If ON is selected, Smart Data screens are automatically displayed
when you turn on your device.

9Using the S8 Auto 25
English
Using the Data Card
If your clinician needs to review your treatment, they will ask you to use the Data Card
to copy data from your S8 device and return the card to them.
Copying Data onto a Data Card
1Switch on your S8 and wait until you see the standby (Ramp) screen.
2Hold the Data Card with the arrow facing up and insert it into the Data Card slot until
it stops. Data copying starts automatically.
The “Card Inserted Please Wait” message is displayed on the LCD while data is being
copied. Copying takes up to 30 seconds.
The “Copy Complete Remove Card” message is displayed on the LCD when copying
has finished.
3Remove the Data Card by gripping the end of the Data Card and pulling it out.
4Store the Data Card in its protective folder when not in use.
5Return the card in its protective folder to your clinician using a postal envelope.
Updating Settings on your S8 Auto 25
If your clinician has provided a Data Card with new device settings:
1With the device in standby (Ramp) mode, insert the Data Card into the slot on the
Data Card module. Updating will start automatically.
The “Card Inserted Please Wait” message is displayed on the LCD while updating is
in progress. Updating takes approximately five seconds.
The “Settings Success Remove Card” message is displayed on the LCD if the
settings were updated successfully.
Note: This message only appears once. If you re-insert the Data Card after you have
updated your settings, this message is not displayed.
2Remove the Data Card from the S8 device.
3Store the Data Card in its protective folder when not in use.
!
WARNING
If your clinician has told you to use the Data Card to update the settings on your
device and the “Settings Success” message does not appear, contact your
clinician immediately.

10
Traveling with the S8 Auto 25
International Use
Your S8 flow generator has an internal power adapter that enables it to operate in
other countries. It will operate on power supplies of 100–240V and 50–60Hz. No
special adjustment is necessary, but you will require an approved power cord for that
country.
Use on an Aircraft
Please consult the medical services department of your carrier if you intend to use
your S8 device on an aircraft.
Note: You should not use your S8 device while the aircraft is taking off or landing.
Use with DC Power
You must use a ResMed DC/DC Converter 24V/50W to connect your S8 Auto 25 to
a 12V or 24V DC power source. Contact your equipment supplier or ResMed for
details.
!
WARNING
The device should not be connected to both AC and DC power sources
simultaneously.

11Cleaning and Maintenance
English
Cleaning and Maintenance
You should regularly carry out the cleaning and maintenance described in this section.
Refer to your mask and humidifier manuals for detailed instructions regarding the care
of those devices.
Daily
Disconnect the air tubing and hang it in a clean, dry place until next use.
Weekly
1Remove the air tubing from the S8 device and the mask.
2Wash the air tubing in warm water using mild detergent.
3Rinse thoroughly, hang, and allow to dry.
4Before the next use, reconnect the air tubing to the air outlet and mask.
Monthly
1Clean the exterior of the S8 with a damp cloth and mild liquid soap.
2Check the air filter for holes and blockage by dirt or dust.
!
WARNING
•Beware of electric shock. Do not immerse the unit or power cord in water.
Always unplug the unit before cleaning and be sure it is dry before plugging
back in.
•The mask system and air tubing are subject to normal wear and tear. Inspect
them regularly for damage.
•Do not use bleach, chlorine, alcohol, or aromatic-based solutions,
moisturising or antibacterial soaps or scented oils to clean the air tubing or
the device. These solutions may cause hardening and reduce the life of the
product.
Replacing the Air Filter
Replace the air filter every six months (or more often if necessary).
1Remove the air filter cover at the back of the S8 device.
2Remove and discard the old air filter.
3Insert a new filter with the blue-tinted side facing out from the device.
4Replace the air filter cover.
Air filter cover

12
!
WARNING
•Do not wash the air filter. The air filter is not washable or reusable.
•The air filter cover protects the device in the event of accidental liquid
spillage onto the device. Ensure the air filter and air filter cover are fitted at
all times.
Servicing
This product should be inspected by an authorised ResMed service centre five years
from the date of manufacture. Prior to this, the device is intended to provide safe and
reliable operation provided that it is operated and maintained in accordance with the
instructions provided by ResMed. Applicable ResMed warranty details are provided
with the device at the time of original supply. Of course, as with all electrical devices,
if any irregularity becomes apparent, you should exercise caution and have the device
inspected by an authorised ResMed service centre.
!
CAUTION
•Do not attempt to open the S8 case. There are no user serviceable parts
inside.
•Inspection and repair should only be performed by an authorised agent.
Under no circumstances should you attempt to service or repair the flow
generator yourself.

13Troubleshooting
English
Troubleshooting
If there is a problem, try the following suggestions. If the problem cannot be solved,
contact your equipment supplier or ResMed. Do not attempt to open the device.
No display
Insufficient air delivered from the S8 device
Device does not start when you breathe into the mask
Device does not stop when you remove your mask
SmartStart/Stop is enabled but the flow generator does not stop automatically when you
remove your mask
Displays error message: Check tube!! Key if done
Problem/Possible Cause Solution
Power is not connected. Ensure the power cable is connected and the power switch (if
available) is on.
Ramp time is in use. Wait for air pressure to build up or change ramp time.
Air filter is dirty. Replace air filter.
Air tubing is not connected
properly.
Check air tubing.
Mask and headgear are not
positioned correctly.
Adjust position of mask and headgear.
Cushion seated incorrectly
causing excessive leak.
Adjust headgear or re-fit cushion.
Humidifier control dial set too
high, resulting in accumulation of
water in the air tubing.
Turn humidifier control down and empty the water from the air
tubing.
Breath is not deep enough to
trigger SmartStart/Stop.
Take a deep breath in and out through the mask.
There is excessive leak. Adjust position of mask and headgear.
Air tubing not connected properly. Connect firmly at both ends.
SmartStart/Stop is disabled.
Note: SmartStart/Stop is not
available if you are using a Full
Face Mask or if Leak Alert is
enabled.
Enable SmartStart/Stop.
SmartStart/Stop is not enabled.
Note: SmartStart/Stop is not
available if you are using a Full
Face Mask or if Leak Alert is
enabled.
Enable SmartStart/Stop.
Incompatible mask system being
used.
Use only equipment recommended by ResMed.
The air tubing is loose or blocked. Check that the air tubing is connected securely to your mask
and the air outlet. Press the Start/Stop key to restart the
device. If this does not clear the message, disconnect the
power cord and then reconnect it to restart the device.

14
Displays error message: Exxxx Call Service (where xxxx defines an error)
Displays error message: HIGH LEAK!!! Adjust Mask
The following message is displayed on the LCD after you try to update settings or copy data to
the Data Card: Card Error Remove Card
The following message is displayed on the LCD after you try to update the settings using the
Data Card: Settings Invalid Remove Card
The following message is displayed on the LCD after you try to update the settings using the
Data Card: Settings Error Remove Card
The following message is NOT displayed on the LCD after you try to update the settings using
the Data Card: Settings Success Remove Card
Problem/Possible Cause Solution
Component failure. Record error number and contact your ResMed service centre.
You have experienced excessively
high leak levels for more than 20
seconds.
Check that your air tubing is connected properly.
Adjust headgear.
Data Card is not inserted
correctly.
Ensure that the Data Card is inserted with the arrow facing up
as far as it can go.
You may have removed the Data
Card before settings were copied
to the S8 device.
Reinsert the Data Card and wait for the Settings Success
Remove Card or Copy Complete Remove Card
message to appear on the LCD.
The identification details on the
Data Card do not match the
details on your device.
Contact your clinician/service provider immediately.
There is a data error on the Data
Card.
Contact your clinician/service provider immediately.
The settings were not updated. Contact your clinician/service provider immediately.

15Technical Specifications
English
Technical Specifications
Notes: •The manufacturer reserves the right to change these specifications without notice.
•Pressure may be displayed in cm H20 or hPa.
Operating pressure range 4 to 25 cm H2O
Maximum single fault steady
state pressure
40 cm H2O
Pressure measurement
tolerance
±0.5 cm H2O ± 4% of the measured reading
Flow measurement tolerance ±0.1 or 20% of reading, whichever is greater
VAuto mode 4 to 25 cm H2O (measured at the mask); Min EPAP: 4 cm H2O;
Pressure Support: 0 to 10 cm H2O
CPAP mode 4 to 20 cm H2O (measured at the mask)
DECLARED DUAL-NUMBER NOISE EMISSION VALUES in accordance with ISO 4871:
Sound pressure level 26 dBA with uncertainty of 2 dBA as measured according to
ISO 17510-1: 2002
28 dBA with uncertainty of 2 dBA as measured according to
ISO 17510-1: 2007
Sound power level 36 dBA with uncertainty of 2 dBA as measured according to
ISO 17510-1: 2007
Dimensions (L x W x H) 112 mm x 164 mm x 145 mm
Weight 1.3 kg
Power supply Input range 100–240V, 50–60Hz, 40VA (typical power consumption),
< 100VA (maximum power consumption)
Housing construction Flame retardant engineering thermoplastic
Operating temperature +5ºC to +35ºC
Operating humidity 10–95% non-condensing
Storage and transport
temperature
-20ºC to +60ºC
Storage and transport humidity 10–95% non-condensing
Operating altitude Sea level to 2,600 m
Supplemental Oxygen Recommended maximum supplemental oxygen flow: 4 L/min
Electromagnetic compatibility Product complies with all applicable electromagnetic compatibility
requirements (EMC) according to IEC60601-1-2, for residential,
commercial, and light industry environments
Air filter Two-layered, powder-bonded, polyester non-woven fiber
Air tubing Flexible plastic, 1 x 2 m
Air outlet The 22 mm conical air outlet complies with ISO 5356-1
IEC 60601-1 classification Class II (double insulation), Type CF

16
Symbols Which Appear On The Device
Caution; Follow instructions for use; Drip proof; Type CF equipment;
Dangerous voltage; Class II equipment; Start/Stop and mask-fit;
Manufacturer; Environmental information
WEEE 2002/96/EC is a European Directive that requires the proper disposal of electrical and electronic
equipment. This device should be disposed of separately, not as unsorted municipal waste. To dispose
of your device, you should use appropriate collection, reuse and recycling systems available in your
region. The use of these collection, reuse and recycling systems is designed to reduce pressure on
natural resources and prevent hazardous substances from damaging the environment.
If you need information on these disposal systems, please contact your local waste administration. The
crossed-bin symbol invites you to use these disposal systems. If you require information on collection
and disposal of your ResMed device please contact your ResMed office, local distributor or go to
www.resmed.com/environment.
General Warnings and Cautions
!
Warnings
•Advice contained in this manual should not supersede instructions given by the
prescribing physician.
•A patient should not connect a device to the data communication port unless instructed
to do so by their health care provider or physician. Only ResMed products are designed
to be connected to the data communication port. Connecting other devices could result
in injury, or damage to the S8 device.
•This S8 device should only be used with masks (and connectors*) recommended by
ResMed, or by a physician or respiratory therapist. A mask should not be used unless the
S8 device is turned on and operating properly. The vent hole or holes associated with the
mask should never be blocked.
Explanation: This S8 device is intended to be used with special masks (or connectors*)
which have vent holes to allow continuous flow of air out of the mask. When the device
is turned on and functioning properly, new air from the device flushes the exhaled air out
through the mask vent holes. However, when the device is not operating, insufficient
fresh air will be provided through the mask, and the exhaled air may be rebreathed.
Rebreathing of exhaled air for longer than several minutes can, in some circumstances,
lead to suffocation. This applies to most Positive Airway Pressure devices.
•In the event of power failure†or machine malfunction, remove the mask.
•This S8 device can be set to deliver pressures up to 25 cm H2O. In the unlikely event of
certain fault conditions, pressures up to 40 cm H2O are possible.
•Follow all precautions when using supplemental oxygen.
•Oxygen flow must be turned off when the flow generator is not operating, so that
unused oxygen does not accumulate within the flow generator enclosure and create a
risk of fire.
•If the oxygen has been left on, turn off the device, then wait 30 minutes before turning on
the device again.
* Ports may be incorporated into the mask or in connectors that are near the mask.
† During partial (below rated minimum voltage) or total power failure, therapy pressures will not be
delivered. When power is restored, operation will recommence with no change to settings.

17General Warnings and Cautions
English
Note: At a fixed rate of supplemental oxygen flow, the inhaled oxygen concentration
varies, depending on the pressure settings, patient breathing pattern, mask, point of
application and leak rate.
•Do not use the S8 Auto 25 if there are obvious external defects or unexplained changes
in performance.
•Do not open the S8 case. There are no user serviceable parts inside. Repairs and internal
servicing should only be performed by an authorised service agent.
•Explosion hazard—do not use in the vicinity of flammable anesthetics.
!
Cautions
•At low pressures, the flow through the exhalation ports of your mask may not clear all
exhaled gas from the tubing. Some rebreathing may occur.
•The airflow for breathing produced by this device can be as much as 11ºF (6ºC) higher
than the temperature of the room. Caution should be exercised if the room temperature
is warmer than 90ºF (32ºC).
•When AC mains power (100–240V AC) is not available, always use a ResMed DC/DC
Converter 24V/50W. (The DC/DC Converter 24V/50W is available as an optional
accessory. It is not supplied with all models.)
Note: The above are general warnings and cautions. Specific warnings, cautions and
notes appear with the relevant instructions in the manual.