Datex-Ohmeda Aespire View Assembly instructions

Aespire View
User’s Reference Manual
Software Revision 6.X

Datex-Ohmeda, Inc., a General Electric Company, doing business as GE Healthcare.
User Responsibility
This Product will perform in conformity with the description thereof
contained in this User’s Reference manual and accompanying labels
and/or inserts, when assembled, operated, maintained, and repaired
in accordance with the instructions provided. This Product must be
checked periodically. A defective Product should not be used. Parts
that are broken, missing, plainly worn, distorted, or contaminated
should be replaced immediately. Should repair or replacement
become necessary, Datex-Ohmeda recommends that a telephonic or
written request for service advice be made to the nearest
Datex-Ohmeda Customer Service Center. This Product or any of its
parts should not be repaired other than in accordance with written
instructions provided by Datex-Ohmeda and by Datex-Ohmeda
trained personnel. The Product must not be altered without the prior
written approval of Datex-Ohmeda. The user of this Product shall
have the sole responsibility for any malfunction which results from
improper use, faulty maintenance, improper repair, damage, or
alteration by anyone other than Datex-Ohmeda.
CAUTION U.S. Federal law restricts this device to sale by or on the
order of a licensed medical practitioner. Outside the
U.S.A., check local laws for any restriction that may apply.
Datex-Ohmeda products have unit serial numbers with coded logic
which indicates a product group code, the year of manufacture, and a
sequential unit number for identification. The serial number can be in
one of two formats.
Aespire, 7900 Ventilator, Advanced Breathing System, Link-25,
ComWheel, Disposable Multi Absorber, EZchange, Reusable
Multi Absorber, PSVPro, SmartVent, Tec 6, and Tec 7 are
registered trademarks of Datex-Ohmeda, Inc.
Other brand names or product names used in this manual are
trademarks or registered trademarks of their respective holders.
AAAX11111 AAAXX111111AA
The Xrepresents an alpha
character indicating the year
the product was manufactured;
H= 2004, J= 2005, etc. Iand
Oare not used.
The XX represents a number
indicating the year the product
was manufactured; 04 = 2004,
05 = 2005, etc.

M1132382 i
Table of Contents
1 Introduction
Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Symbols used in the manual or on the equipment . . . . . . . . 1-3
Typeface conventions used . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
2 System Controls and Menus
Anesthesia system controls . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Advanced breathing system (ABS) components . . . . . . . . . 2-5
Optional ABS components . . . . . . . . . . . . . . . . . . . . . . . 2-7
Vaporizer controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
ACGO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Scavenging the ACGO sample flow . . . . . . . . . . . . . . . 2-11
Scavenging from an auxiliary manual breathing circuit 2-11
Scavenging a gas monitor sample flow . . . . . . . . . . . . 2-11
Ventilator controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Ventilator screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Using menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
3 Operation
Turning on the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Start mechanical ventilation . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Start manual ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Ventilator setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Using quick keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Changing ventilator modes and settings . . . . . . . . . . . . 3-4
Alarm Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Setting volume alarms . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Alarm limit setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Setup/Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

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Screen and audio setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Cardiac Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Measure circuit compliance . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Pressure waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
EZchange canister (optional) . . . . . . . . . . . . . . . . . . . . . . . 3-10
Condenser (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Passive AGSS (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Connecting passive AGSS . . . . . . . . . . . . . . . . . . . . . . 3-12
Active AGSS (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Connecting active AGSS with a flow indicator . . . . . . . 3-14
Connecting active adjustable AGSS . . . . . . . . . . . . . . 3-15
Total flow sensing (optional) . . . . . . . . . . . . . . . . . . . . . . . 3-15
4 Preoperative Checkout
Every day before your first patient . . . . . . . . . . . . . . . . . . . . 4-2
Before every patient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
5 Preoperative Tests
Inspect the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Power failure alarm test . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Pipeline test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Total flow sensing test (if equipped) . . . . . . . . . . . . . . . . . . 5-3
Cylinder test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Flow control test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Vaporizer installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Vaporizer back pressure test . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Low-pressure leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Negative low-pressure leak test . . . . . . . . . . . . . . . . . . . 5-9
Positive low-pressure leak test . . . . . . . . . . . . . . . . . . 5-10
Alarm tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
Breathing system tests . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Bellows test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Breathing circuit test . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
APL valve test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Monitor and ventilator tests . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Table of Contents
M1132382 iii
6 Alarms and Troubleshooting
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Latching alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
List of alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Minimum system shutdown and monitoring alarms . . . . 6-9
Alarm ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Alarm tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Breathing system problems . . . . . . . . . . . . . . . . . . . . . . . . 6-12
Electrical problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
Pneumatic problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
7 User Maintenance
Repair policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Maintenance summary and schedule . . . . . . . . . . . . . . . . . 7-2
User maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Datex-Ohmeda approved service . . . . . . . . . . . . . . . . . 7-3
Breathing system maintenance . . . . . . . . . . . . . . . . . . . . . . 7-3
O2 cell replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
O2 cell calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
21% O2 cell calibration . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
100% O2 cell calibration . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Zeroing flow sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Prevent water buildup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

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iv M1132382
8 Setup and Connections
Canister setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
When to change the absorbent . . . . . . . . . . . . . . . . . . . 8-6
Removing a canister . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
Removing an EZchange canister . . . . . . . . . . . . . . . . . . 8-7
Reusable Multi Absorber canister filling . . . . . . . . . . . . . 8-7
Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Mains inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Serial port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Pneumatic connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Pipeline Inlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Scavenging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
Sample gas return port . . . . . . . . . . . . . . . . . . . . . . . . 8-11
Suction regulator (optional) . . . . . . . . . . . . . . . . . . . . . 8-12
Auxiliary O2 flowmeter (optional) . . . . . . . . . . . . . . . . . 8-12
How to install gas cylinders . . . . . . . . . . . . . . . . . . . . . . . . 8-13
Pin indexed cylinder yokes . . . . . . . . . . . . . . . . . . . . . 8-13
DIN cylinder connections . . . . . . . . . . . . . . . . . . . . . . . 8-13
High-pressure leak test . . . . . . . . . . . . . . . . . . . . . . . . 8-14
How to attach equipment to the top of the machine . . . . . . 8-14
9 Parts
Flow sensor module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Exhalation valve assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Breathing circuit module . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
Bellows assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Absorber canister . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
AGSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
EZchange canister system . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7
Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
Test tools and system parts . . . . . . . . . . . . . . . . . . . . . . . . . 9-9

Table of Contents
M1132382 v
10 Specifications and Theory of Operation
System pneumatic circuits . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
Gas supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
O2 flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
N2O flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
Mixed gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
EZchange canister . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Pneumatic specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Gas supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
ACGO Port relief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Electrical block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-6
Electrical power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7
Power cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8
Battery information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8
Flow specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-9
Pneumatic flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-9
Breathing system specifications . . . . . . . . . . . . . . . . . . . . 10-10
Gas scavenging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11
Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12
Environmental requirements . . . . . . . . . . . . . . . . . . . . . . 10-12
Suction regulators (optional) . . . . . . . . . . . . . . . . . . . . . . 10-13
Auxiliary O2 flowmeter (optional) . . . . . . . . . . . . . . . . . . . 10-13
Ventilator theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14
O2 monitoring theory of operation . . . . . . . . . . . . . . . 10-15
Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15
Ventilator operating specifications . . . . . . . . . . . . . . . . . . 10-23
Pneumatics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Fresh gas compensation . . . . . . . . . . . . . . . . . . . . . . 10-23
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Ventilator accuracy data . . . . . . . . . . . . . . . . . . . . . . . . . 10-24

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Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . 10-26
Guidance and manufacturer’s declaration -
electromagnetic emissions . . . . . . . . . . . . . . . . . . . . . 10-26
Guidance and manufacturer’s declaration -
electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . 10-27
Recommended separation distances . . . . . . . . . . . . . 10-29
Electrical safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-30
IEC 60601-1 Classification . . . . . . . . . . . . . . . . . . . . . . . . 10-31
Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-31
System components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-32
Integral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-32
Not integral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-32
Index
Warranty

M1132382 1-1
1 Introduction
In this section Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Symbols used in the manual or on the equipment . . . . . . . . 1-3
Typeface conventions used . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

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1-2 M1132382
Intended use
The Aespire anesthesia system is a compact, integrated, and intuitive
anesthesia delivery system. The 7900 Ventilator provides mechanical
ventilation for patients during surgery as well as monitoring and
displaying various patient parameters.
The 7900 Ventilator uses a microprocessor-controlled ventilator with
internal monitors, electronic PEEP, Volume Mode, and other optional
features. A serial interface permits communication to external
monitoring.
This anesthesia system is not suitable for use in an MRI environment.
This system must only be operated by medical personnel authorized
and trained to use this product. It must be operated according to the
instructions in this User’s Reference manual.
Note Configurations available for this product depend on local market and
standards requirements. Illustrations in this manual may not
represent all configurations of the product. This manual does not
cover the operation of every accessory. Refer to the accessory
documentation for further information.

1 Introduction
M1132382 1-3
Symbols used in the manual or on the equipment
Symbols replace words on the equipment, on the display, or in
manuals.
Warnings and Cautions tell about the dangerous conditions that can
occur if the instructions in the manual are not followed.
Warnings tell about a condition that can cause injury to the operator
or the patient.
Cautions tell about a condition that can cause damage to the
equipment. Read and follow all warnings and cautions.
On (power) Off (power)
Standby O2+O2 flush button
Type BF equipment Type B equipment
Dangerous voltage Frame or chassis ground
Direct current Alternating current
Caution Attention, refer to product instructions
Refer to product instructions Exhaust
Electrical input Electrical output
Electrical input/output Sample gas inlet to scavenging
Pneumatic inlet Pneumatic outlet
SN Serial number REF Stock number

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1-4 M1132382
Equipotential Lamp, lighting, illumination
Protective earth ground Earth ground
Variability Variability in steps
Suction bottle outlet Vacuum inlet
Max Vacuum
+Plus, positive polarity -Minus, negative polarity
Bag position/manual ventilation Mechanical ventilation
Inspiratory flow Expiratory flow
Movement in one direction Movement in two directions
Lock Unlock
Isolation transformer Low pressure leak test
134°C Autoclavable Not autoclavable
Bellows volumes are approximate O2% O2 cell connection
APL settings are approximate Anesthetic Gas Scavenging System

1 Introduction
M1132382 1-5
Pinch hazard Read to top of float
EZchange Canister (CO2 bypass) Caution: federal law prohibits dispensing
without prescription
Open drain (remove liquid) Close drain
Alarm silence touch key Menu touch key
Silence alarm touch key (Tec 6) Volume alarms On/Off touch key
End case touch key Cylinder
Systems with this mark agree with the
European Council Directive (93/42/EEC) for
Medical Devices when they are used as
specified in their User’s Reference manuals.
The xxxx is the certification number of the
Notified Body used by GE Healthcare’s
Quality Systems.
Authorized representative in the European
Community
Manufacturer Date of manufacture
Indicates that the waste of electrical and
electronic equipment must not be disposed
as unsorted municipal waste and must be
collected separately. Please contact an
authorized representative of Datex-Ohmeda
for information concerning the
decommissioning of equipment.
GOST R Russian certification
This way up USB port
Ethernet connection This product consists of devices that
may contain mercury, which must be
recycled or disposed of in accordance
with local, state, or country laws. (Within
this system, the backlight lamps in the
monitor display contain mercury.

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1-6 M1132382
Typeface conventions used
Menu items are written in bold italic typeface; for example, Main
Menu.
Messages that are displayed on the screen are enclosed in single
quotes: for example, ‘Total pressure exceeds Pmax.’
When referring to different sections and other documents, the names
are written in italic typeface and enclosed in double quotes; for
example, “System Controls and Menus.”
Abbreviations
Abbreviation Definition
A
ABS Advanced breathing system
ACGO Auxiliary common gas outlet
AGSS Anesthetic gas scavenging system
APL Adjustable pressure-limiting valve
C
CO2 Carbon dioxide
D
DAC Digital to analog converter
E
EMC Electromagnetic compatibility
ESD Electrostatic discharge
I:E Inspiratory-expiratory ratio
F
FiO2 Fraction of inspired oxygen
M
MIN Minimum
MV Minute volume
MVexp Expired minute volume
O
O2 Oxygen

1 Introduction
M1132382 1-7
P
Paw Patient airway pressure
PCV Pressure controlled ventilation
PCV-VG Pressure controlled ventilation - volume guaranteed
PEEP Positive end expiratory pressure
Pmax Maximum pressure
Pmean Average pressure calculated over the patient breath
Pinsp Target airway pressure
Ppause Positive airway pressure measured at the end of
Tpause
Ppeak Maximum airway pressure measured during patient
breath
Psupport Pressure support
PSVPro Pressure supported ventilation with apnea backup
R
RR Respiratory rate
S
SIMV-PC Synchronized intermittent mandatory ventilation -
pressure controlled
SIMV/PSV Synchronized intermittent mandatory ventilation /
pressure supported ventilation
T
TFS Total flow sensing
Tpause Pause time
Tinsp Inspired tidal volume
TV Tidal volume
TVexp Expired tidal volume
V
VCV Volume controlled ventilation

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M1132382 2-1
2 System Controls and Menus
WARNING Explosion Hazard. Do not use this system with flammable
anesthetic agents.
wDo not use antistatic or electrically-conductive breathing
tubes or masks. They can cause burns if used near high
frequency surgical equipment.
In this section Anesthesia system controls . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Advanced breathing system (ABS) components . . . . . . . . . 2-5
Vaporizer controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
ACGO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Ventilator controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Ventilator screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Using menus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Aespire View
2-2 M1132382
Anesthesia system controls
Figure 2-1 • Front view
1. Light switch 8. Brake
2. Dovetail rails 9. O2 flush button
3. Vaporizer 10. Auxiliary O2 flow control (optional)
4. Pipeline pressure gauge(s) (upper row) 11. Breathing system
5. Cylinder pressure gauge(s) (lower row) 12. Flow controls
6. System switch 13. Ventilator display
7. Integrated suction (optional)
AC.20.002
1
2
13
11
10
9
8
4
3
5
6
7
12

2 System Controls and Menus
M1132382 2-3
Item, Figure 2-1 Description
6 System switch Set the switch to the On (|) position to permit gas flow and to turn on the system.
7 Integrated suction
(optional)
Turn the switch to MAX for full vacuum. Turn the switch to Off (0) for no vacuum. Turn
the switch to On (|) for adjustable vacuum. When in adjustable vacuum, turn the knob
clockwise to increase the vacuum and counterclockwise to decrease the vacuum.
8 Brake Push down to lock. Lift to release.
9 O2 flush button Push the O2 flush button to supply high flows of O2 to the breathing system.
10 Auxiliary O2 flow
control (optional)
Turn the knob counterclockwise to increase the flow. Turn the knob clockwise to
decrease the flow.
12 Flow controls Turn the knob counterclockwise to increase the flow. Turn the knob clockwise to
decrease the flow. The System switch must be On for gas to flow.

Aespire View
2-4 M1132382
Figure 2-2 • Rear view
1. Outlet circuit breaker 5. Mains inlet
2. Electrical outlet 6. System circuit breaker
3. Suction items (optional) 7. Cylinder
4. Equipotential stud 8. Pipeline connections
1
2
4
5
7
8
AC.20.012
6
3