ResMed Positive Airway Pressure Device S8 User manual

S8 Lightweight™ II
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 Authorized
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: US 5199424, US 5522382, US 6705315. Other patents pending.
Protected by design registrations: AU 302180, AU 302181, AU 302182, AU 302183, AU 302184, AU 302185, AU 302186,
CN 200430121212.2, CN 200430121213.7, CN 200430121211.8, CN 200430121214.1, CN 200430121215.6, CN
200430121216.0, CN 200430121217.5, EP 269436, HK 0412901.9, 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 D553228, US D557406, US D557407, US D560795, US D561891, US D565160. Others pending.
S8, S8 Lightweight, ResScan, ResControl, ResLink and ResTraxx are trademarks of ResMed Ltd and Lightweight and
HumidAire are registered in U.S. Patent and Trademark Office.
© 2008 ResMed Ltd. 338567/2 08 10

iContents
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Contraindications 1
Adverse Effects 1
The S8 Lightweight II System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Masks 2
Humidifiers 2
ResScan Data Card 2
Using the S8 Lightweight II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Set Up the S8 Lightweight II 3
Start Treatment 4
Stop Treatment 4
How to Use the Control Panel 4
How to Change the Settings on your S8 Lightweight II 6
Using the Data Card to Collect data . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cleaning and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Daily 9
Weekly 9
Monthly 9
Replacing the Air Filter 9
Servicing 10
Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
General Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1Introduction
Introduction
The S8 Lightweight II continuous positive airway pressure (CPAP) system is
indicated for the treatment of obstructive sleep apnoea (OSA) in patients > 30 kg.
The S8 Lightweight II CPAP system is intended for home and hospital use.
Contraindications
The S8 Lightweight II 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 CPAP
device:
•drying of the nose, mouth, or throat
•nosebleed
•bloating
•ear or sinus discomfort
•eye irritation
•skin rashes.

2
The S8 Lightweight II System
Your S8 Lightweight II comprises:
•S8 Lightweight II positive airway pressure device
•2 m air tubing
•Power cord
•Carry bag.
Optional components include:
•ResScan™ Data Card
•3 m air tubing
•DC-12 converter.
Masks
For information on using masks, see your mask manual. Recommended masks
are available on www.resmed.com on the Products page under Service &
Support.
!
WARNING
Only ResMed mask systems are compatible for use with the S8 Lightweight
II. Please refer to “Adverse Effects” on page 1.
Humidifiers
A list of humidifiers compatible with ResMed devices can be found on
www.resmed.com, on the Products page under Service & Support.
ResScan Data Card
The ResScan Data Card may be used with the S8 Lightweight II either to help
your clinician to monitor your treatment or to provide you with updates to your
device settings.
Carry handle
Screen
Keypad
Air outlet
Data
DC
AC
Card slot
Air inlet

3Using the S8 Lightweight II
Using the S8 Lightweight II
!
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.
•Make sure the area around the device is dry and clean.
Set Up the S8 Lightweight II
1Connect the power cord to the socket at the rear of the S8 Lightweight II.
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.
1
2
34

4
Start 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.
2Lie down and arrange the air tubing so that it is free to move if you turn in your
sleep.
!
CAUTION
Do not leave long lengths of air tubing around the top of your bed. They
could twist around your head or neck while you are sleeping.
3Alter the ramp time if required (see “How to change the ramp time” on page 6).
4To start treatment, press .
5Fit your mask as described in the mask user instructions.
!
WARNING
A mask should not be used unless the S8 Lightweight II device is turned on
and operating properly.
When ramping begins the LCD will display the word “RAMPING“, with the
current pressure indicated as dashes. Each dash is approximately equivalent to
2 cm H2O. For example, 6 dashes represents approximately 12 cm H2O
pressure.
Stop Treatment
To stop treatment at any time, remove your mask and press .
How to Use the Control Panel
The control panel of the S8 Lightweight II includes an LCD screen which displays
the menus and treatment screens as well as a keypad for navigating through the
menus and delivering treatment.
LCD screen
Start/Stop key
Keypad

5Using the S8 Lightweight II
The S8 Lightweight II keypad has the following keys:
The keypad and LCD are equipped with backlights that come on when the device
is powered. The LCD backlight turns off after two minutes of inactivity, and
comes back on when you press a key. The keypad backlight is always on while
the S8 Lightweight II is on.
Key Function
Start/Stop Starts or stops treatment.
Up Allows you to increase settings options and scroll through the
S8 Lightweight II menu.
Down Allows you to decrease settings options and scroll through
the S8 Lightweight II 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.

6
How to Change the Settings on your S8 Lightweight II
You can change settings (such as Ramp Time) on the S8 Lightweight II by using
the keypad and LCD. When the S8 Lightweight II is in standby mode you can
display a series of screens (a menu) on the LCD screen in order to view and
change the settings for a particular function.
Use the menu screens to change the ramp time and language. You can also view
details about the usage and software version of your S8 Lightweight II.
How to change the ramp time
During ramp time, the pressure increases from a low pressure to the prescribed
treatment pressure. You can set the ramp time in 5-minute intervals, from 0
minutes (OFF) up to a maximum ramp time set by your clinician. The standby
screen displays the current ramp time in the right corner.
1. Press or until the desired ramp time appears.
2. Once a ramp time is selected, begin therapy by pressing .
When ramping begins the LCD will display the word "RAMPING", with the
current pressure indicated as dashes. Each dash is approximately equivalent
to 2 cm H2O. For example, six dashes represents approximately 12 cm H2O
pressure.
How to change the EPR level
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).
S8 ESCAPE II
S8 CLASSICRAMP 10min
Menu
S8 CLASSIC
PATIENT MENU
USED HRS: 960
Exit
USAGE: 120/180
Exit
SW: SX123456789
Exit
LANG: ENGLISH
Change Exit
EPR LEVEL: 1
Change Exit
Only displayed if
clinician enabled

7Using the S8 Lightweight II
1. On the standby (RAMP) screen, press .
2. Press until you see EPR LEVEL, then press (Change).
3. Press or until you see the setting that you require.
4. Press (Apply) to save the setting.
How to change the language setting
1. On the standby (Ramp) screen, press (Menu).
2. Press until you see LANG (Language), then press (Change).
3. Press or until you see the language that you require.
4. Press (Apply) to save the new language.
Messages on the S8 Lightweight II LCD
Your clinician may have set your S8 Lightweight II to remind you about important
events, such as when to replace your mask, when to insert your Data Card (if
your device is Data Card enabled) 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:
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
May appear when
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
May appear as a
reminder to contact
your clinician, eg, to
discuss how your
therapy is going.
Press (Ok) to remove the message from
your LCD, and contact your clinician.
REPLACE
FILTER
May appear as a
reminder to replace
the air filter on your
device.
Press (Ok) to remove the message from
your LCD, and replace the air filter.
SERVICE
DUE
May appear as a
reminder to return
your device for
service.
Press (Ok) to remove the message from
your LCD, and contact your clinician.

8
Using the Data Card to Collect data
If your clinician needs to review your treatment, they will ask you to use the Data
Card to copy data from your S8 Lightweight II, and to return the card to them. The
Data Card will be provided in a protective folder.
Data that is copied to a Data Card is still stored and available on the S8 Lightweight II.
Copy data onto the Data Card
1. Switch on the S8 Lightweight II and wait until you see the standby (Ramp)
screen.
2. Hold 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 S8 Lightweight II
LCD while data is being copied. Copying takes approximately five seconds.
The “Copy Complete Remove Card” message is displayed on the LCD when
copying has finished.
3. Remove the Data Card by gripping the end of the Data Card and pulling it out.
4. Store the Data Card in its protective folder when not in use.
5. Return the card in its protective folder to your clinician using a postal envelope.
Using the Data Card to Update Settings
If your clinician has provided a Data Card with new device settings:
1. With 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.
2. Remove the Data Card from the S8 Lightweight II.
3. Store the Data Card in its protective folder when not in use.
!
WARNING
If your clinician has told you to use this Data Card to update the settings on your
device and the “Settings Success” message does not appear, contact your
clinician immediately.
Cleaning and Maintenance
!
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.

9Cleaning and Maintenance
!
CAUTION
•Do not hang the air tubing in direct sunlight as it may harden over time
and eventually crack.
•Do not use bleach, chlorine, alcohol, or aromatic-based solutions,
moisturising or antibacterial soaps or scented oils to clean the air tubing
or the S8 Lightweight II. These solutions may cause hardening and
reduce the life of the product.
Daily
Disconnect the air tubing and hang it in a clean, dry place until next use.
Weekly
1. Remove the air tubing from the S8 Lightweight II and the mask.
2. Wash the air tubing in warm water using mild detergent.
3. Rinse thoroughly, hang, and allow to dry.
4. Before next use, reconnect the air tubing to the air outlet and mask.
Monthly
1. Clean the exterior of the S8 Lightweight II with a damp cloth and mild liquid
soap.
2. Check the air filter for holes and blockage by dirt or dust. Replace it every six
months, or more often in a dusty environment (see “Replacing the Air Filter”
on page 9).
Replacing the Air Filter
!
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.
1. Remove the air filter cover at the back of the S8 Lightweight II.
2. Remove and discard the old air filter.
3. Insert a new filter with the blue tinted side facing out from the device.
4. Replace the air filter cover.
Air filter cover

10
Servicing
!
CAUTION
•Do not attempt to open the S8 Lightweight II 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 S8
Lightweight II yourself.
This device is intended to provide safe and reliable operation when operated and
maintained in accordance with the instructions provided by ResMed. To ensure
that your device continues to provide optimum performance it is recommended
that this product (S8 Lightweight II) be inspected by an authorised ResMed
Service Centre five years from the date of purchase. 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.
If you feel that your device is not performing properly, see “Troubleshooting” on
page 11.
Frequently Asked Questions
How will it feel when I am breathing with the S8 Lightweight II?
When you first use your S8 Lightweight II, you may feel uncomfortable breathing
against the airflow. This is normal. You will continue to breathe normally while
you sleep. The EPR setting may also improve comfort. Take time to adjust to this
new sensation.
What do I do when I want to get up in the night?
If you need to get up during the night, remove your mask and stop therapy.
Always remember to restart therapy and put your mask on when you return to
bed.
What do I do if I feel air leaking out of the mask?
The S8 Lightweight II delivers the most effective treatment when the mask is
well fitted and comfortable. Treatment can be affected by leaks, so it is important
to eliminate any leaks that may arise. For example, try repositioning the mask
and adjusting the straps.
If you are using a nasal mask, try to keep your mouth closed during treatment.
Air leaks from your mouth can decrease the effectiveness of your treatment. If
mouth leaks are a problem, a full face mask or chin strap may help. Contact your
clinician or equipment supplier for further details.
If you are using a full face mask and you have problems trying to get a
comfortable mask fit, contact your clinician or equipment supplier. You may
benefit from a different size or style of mask.

11Troubleshooting
Anything special I should do before putting the mask on?
Before wearing your mask, wash your face to remove excess facial oils. This will
allow a better fit and prolong the life of the mask cushion.
Do not use moisturiser when wearing a mask.
My mouth feels dry during treatment—what can I do?
You may experience dryness of the nose, mouth, and/or throat during the course
of treatment, especially during winter. In many cases, a humidifier may resolve
this discomfort. Contact your clinician for advice.
My nose is irritated during treatment—what can I do?
You may experience sneezing and/or a runny or blocked nose during the first few
weeks of treatment. In many cases, nasal irritation can be resolved with a
humidifier. Consult your clinician or equipment supplier for advice.
Can I travel with the S8 Lightweight II?
Your S8 Lightweight II has an internal power supply 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
the region in which you are using the device.
Please consult the medical services department of your carrier if you intend to use
your S8 Lightweight II on an aircraft. The S8 Lightweight II complies with US FCC
Part 15, Class B requirements.
Note: Do not use your S8 Lightweight II while the aircraft is taking off or landing.
Can I use my S8 Lightweight II if mains (AC) power is not available?
A DC-12 converter is available to connect the S8 Lightweight II to a 12V or 24V
DC power source. Contact your clinician for details.
!
CAUTION
The device should not be connected to both AC and DC power sources
simultaneously.
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
Displays error message: Exxxx Call Service (where xxxx defines an error) or
MOTOR FAULT Call Service or UPLOAD LANGUAGES Call Service or
DATA LOST Call Service
Problem/Possible Cause Solution
Power is not connected. Ensure the power cable is connected and the power
switch (if available) is on.
Component failure. Call service.

12
Insufficient air delivered from S8 Lightweight II
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 settings
or copy data to the Data Card: Settings Invalid Remove Card
The following message is displayed on the LCD after you try to update settings
or copy data to 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
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 kinked or
punctured.
Straighten or replace tubing.
Air tubing is not connected
properly.
Check air tubing.
Mask and headgear are not
positioned correctly.
Adjust position of mask and headgear.
Cap(s) are missing from
access port on mask.
Replace cap(s).
Pressure required for
treatment may have changed.
See your clinician to adjust the pressure.
Data Card is not inserted
correctly.
Check that you are inserting the Data Card into the Data
Card slot with the arrow facing up, while the S8
Lightweight II is switched on and not delivering therapy
(standby mode).
The Data Card is only partly
inserted.
Ensure that the Data Card is inserted into the Data Card
slot as far as it will go.
You may have removed the
Data Card before settings
were copied to the
S8 Lightweight II.
Reinsert the Data Card and wait for the Settings
Success Remove Card message to appear on the
LCD.
The card is not a ResScan Data
Card.
Only use a ResScan Data Card.
The identification details on
the Data Card do not match
the identification details on
your device.
Contact your clinician immediately.
There is a data error on the
Data Card.
Contact your clinician immediately.
The settings were not
updated.
Contact your clinician immediately.

13Technical Specifications
Technical Specifications
.
Note: The manufacturer reserves the right to change these specifications without notice.
Operating pressure range 4 to 20 cm H2O
Dimensions (H x W x D) 112 mm x 164 mm x 145 mm
Weight 1.3 kg
Power Supply •Input range for S8 Lightweight II with HumidAire 4i:100–240V,
50/60Hz; 110V, 400Hz; 2.5A < 140VA (110W) (maximum power
consumption). Instantaneous peak power consumption <340VA.
•Refer to the DC-12 converter instructions for DC ratings. Only
use the ResMed DC-12 converter for DC input.
•Typical power consumption at 20 cm H20 is 34VA or 20W.
Air Filter Two-layered, powder-bonded, polyester non-woven fiber
Air Tubing Flexible plastic,2 m
Air Outlet The 22 mm conical outlet complies with EN 1281-1
IEC 60601-1 Classifications Class II (double insulation), Type CF
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
Supplemental Oxygen Recommended maximum supplemental oxygen flow: 4 L/min
Housing Construction Flame retardant engineering thermoplastic
Operating Temperature +5ºC to +35ºC
Operating Humidity 10%–95% non-condensing
Storage and Transport
Te m p e r a t u r e
-20ºC to +60ºC
Storage and Transport
Humidity
10%–95% non-condensing
Operating Altitude Sea level to 2591 m
Electromagnetic
Compatibility
Product complies with all applicable electromagnetic compatibility
requirements (EMC) according to IEC60601-1-2, for residential,
commercial, and light industry environments.
The electromagnetic compatibility tables for these ResMed devices
can be found on www.resmed.com, on the Products page under
Service & Support. Click on the PDF file for your device.

14
Symbols which appear on the device
Attention, consult accompanying documents; Follow instructions for use; Drip
proof; Type CF equipment; Dangerous voltage; Class II equipment;
Start/Stop; 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
•Read the entire guide before using the S8 Lightweight II.
•Advice contained in this guide 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
Lightweight II device.
•The S8 Lightweight II should 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 Lightweight II device is turned on and
operating properly. The vent hole or holes associated with the mask should
never be blocked.
Explanation: The S8 Lightweight II 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 models of CPAP
devices.
* Ports may be incorporated into the mask or in connectors that are near the mask.

15General Warnings and Cautions
•In the event of power failure or machine malfunction, remove the mask.
•The S8 Lightweight II can be set to deliver pressures up to 20 cm H2O. In the
unlikely event of certain fault conditions, pressures up to 30 cm H2O are
possible.
•If oxygen is used with this device, the oxygen flow must be turned off when
the device is not operating.
If the oxygen has been left on, turn off the device, then wait 30 minutes
before turning on the device again.
Explanation: When the CPAP device is not in operation and the oxygen flow
is left on, oxygen delivered into the air delivery tubing may accumulate within
the CPAP machine enclosure and create a risk of fire. This applies to most
types of CPAP machines.
•Oxygen supports combustion. Oxygen should not be used while you are
smoking or in the presence of an open flame.
•Always ensure airflow is being generated by the device before the oxygen
supply is turned on.
•Always turn the oxygen supply off before stopping the airflow from the
device.
Note: At a fixed rate of supplemental oxygen flow, the inhaled oxygen
concentration will vary, depending on where the oxygen is introduced, the
pressure settings, patient breathing pattern, mask selection, and leak rate.
•Do not use the S8 Lightweight II if there are obvious external defects or
unexplained changes in performance.
•Do not open the S8 Lightweight II 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 6ºC
higher than the temperature of the room. Caution should be exercised if the
room temperature is warmer than 32ºC.
•When AC mains power (100–240V AC) is not available, always use a ResMed
DC-12 converter. (The DC-12 converter 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.

16
Limited Warranty
ResMed warrants that your ResMed product shall be free from defects in
material and workmanship for the period specified below from the date of
purchase by the initial consumer. This warranty is not transferable.
Note: Some models are not available in all regions.
If the product fails under conditions of normal use, ResMed will repair or replace,
at its option, the defective product or any of its components. This Limited
Warranty does not cover:
a) any damage caused as a result of improper use, abuse, modification or
alteration of the product;
b) repairs carried out by any service organization that has not been expressly
authorised by ResMed to perform such repairs;
c) any damage or contamination due to cigarette, pipe, cigar or other smoke;
d) any damage caused by water being spilled on or into a flow generator.
Warranty is void on product sold, or resold, outside the region of original
purchase.
Warranty claims on defective product must be made by the initial consumer at
the point of purchase.
This warranty is in lieu of all other express or implied warranties, including any
implied warranty of merchantability or fitness for a particular purpose. Some
regions or states do not allow limitations on how long an implied warranty lasts,
so the above limitation may not apply to you.
ResMed shall not be responsible for any incidental or consequential damages
claimed to have occurred as a result of the sale, installation or use of any ResMed
product. Some regions or states do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation may not apply to
you. This warranty gives you specific legal rights, and you may also have other
rights which vary from region to region.
For further information on your warranty rights, contact your local ResMed dealer
or ResMed office.
Product Warranty Period
ResMed humidifiers, ResControl™, ResLink™, ResTraxx™ 1 Year
ResMed flow generators 2 Years
Accessories, mask systems (including mask frame, cushion,
headgear and tubing). Excludes single-use devices.
90 Days
R001-307/2 05 06

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