Datex-Ohmeda S-5 Aespire User manual
S/5 Aespire Anesthesia Machine
Technical Reference Manual
S/5 Aespire
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.
AAA F 12345
This alpha character indicates the year of product manufacture
and when the serial number was assigned;
“D” = 2000, “E” = 2001, “F” = 2002, etc.
“I” and “O” are not used.
Aespire, ProTIVA, SmartVent, and Link-25
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.
07/04 1009-0356-000
Covers the following:
Technical Reference Manual
S/5 Aespire anesthesia machine
S/5 Aespire 100 anesthesia machine
S/5 ProTIVA anesthesia machine
1009-0356-000 07/04
This document is not to be reproduced in any manner, nor are the contents to be disclosed to
anyone, without the express authorization of the product service department, Datex-Ohmeda,
Ohmeda Drive, PO Box 7550, Madison, Wisconsin, 53707.
©
2004 Datex-Ohmeda Inc.
i
S/5 Aespire
Important
The information contained in this service manual pertains only to those models of products
which are marketed by Datex-Ohmeda as of the effective date of this manual or the latest
revision thereof. This service manual was prepared for exclusive use by Datex-Ohmeda service
personnel in light of their training and experience as well as the availability to them of parts,
proper tools and test equipment. Consequently, Datex-Ohmeda provides this service manual to
its customers purely as a business convenience and for the customer's general information only
without warranty of the results with respect to any application of such information. Furthermore,
because of the wide variety of circumstances under which maintenance and repair activities
may be performed and the unique nature of each individual's own experience, capacity, and
qualifications, the fact that customer has received such information from Datex-Ohmeda does
not imply in anyway that Datex-Ohmeda deems said individual to be qualified to perform any
such maintenance or repair service. Moreover, it should not be assumed that every acceptable
test and safety procedure or method, precaution, tool, equipment or device is referred to within,
or that abnormal or unusual circumstances, may not warrant or suggest different or additional
procedures or requirements.
This manual is subject to periodic review, update and revision. Customers are cautioned to
obtain and consult the latest revision before undertaking any service of the equipment.
Comments and suggestions on this manual are invited from our customers. Send your
comments and suggestions to the Manager of Technical Communications, Datex-Ohmeda,
Ohmeda Drive, PO Box 7550, Madison, Wisconsin 53707.
wwww CAUTION
Servicing of this product in accordance with this service manual should never be
undertaken in the absence of proper tools, test equipment and the most recent revision
to this service manual which is clearly and thoroughly understood.
Technical Competence
The procedures described in this service manual should be performed by trained and authorized
personnel only. Maintenance should only be undertaken by competent individuals who have a
general knowledge of and experience with devices of this nature. No repairs should ever be
undertaken or attempted by anyone not having such qualifications.
Datex-Ohmeda strongly recommends using only genuine replacement parts, manufactured or
sold by Datex-Ohmeda for all repair parts replacements.
Read completely through each step in every procedure before starting the procedure; any
exceptions may result in a failure to properly and safely complete the attempted procedure.
ii
07/04 1009-0356-000
1 Introduction
Table of Contents
Important . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
Technical Competence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
1.1 What this manual includes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2 Standard service procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2.1 User’s Reference Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2.2 Technical Reference Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.3 What is an S/5 Aespire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
2 Theory of Operation
1.3.1 Aespire 100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.3.2 S/5 ProTIVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.4 Configuration options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
1.4.1 Standard configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
1.4.2 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
1.5 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
1.6 Symbols used in the manual or on the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
2.1 Theory overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2.2 Gas flow through the anesthesia machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2.2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2.2.2 Physical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
2.2.3 Suction regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
2.2.4 System switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
2.2.5 Flow control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
2.3 Flow through the breathing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2.3.1 Overview of flow paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2.3.2 Manual ventilation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2.3.3 Mechanical ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
2.3.4 Fresh gas and O2 flush flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
1009-0356-000 07/04 iii
S/5 Aespire
3 Checkout Procedure
3.1 Inspect the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
3.2 Pipeline and cylinder tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
3.3 Flow control, pressure relief, O2 supply alarm, and flush flow tests . . . . . . . . . . . . . . . . . .3-4
3.3.1 With O2 monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
3.3.2 Without O2 monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.3.3 Pressure relief tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
3.3.4 O2 supply alarm test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
3.3.5 Flush Flow Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
3.4 Vaporizer back pressure test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
3.5 Low-pressure leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
3.5.1 Negative low-pressure leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
3.5.2 ISO or BSI standard low-pressure leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
3.6 Alarm tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
3.7 Breathing system tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
3.8 Auxiliary O2 flowmeter tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
4 Repair Procedures
3.9 Integrated Suction Regulator tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
3.10 Power failure test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
3.11 Electrical safety tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
4.1 Servicing the ventilator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
4.2 How to bleed gas pressure from the machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
4.3 How to remove the rear panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
4.3.1 To remove the rear upper panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
4.3.2 To remove the lower access panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
4.4 How to remove the tabletop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
4.5 Replace pipeline inlet filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
4.5.1 Replace pipeline inlet check valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
4.6 Change drive gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
4.7 Service the cylinder supply modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
4.7.1 Tightening procedure for high-pressure tube fittings . . . . . . . . . . . . . . . . . . . . . . . .4-8
4.7.2 Replace primary regulator module (complete replacement) . . . . . . . . . . . . . . . . .4-8
4.7.3 Replace cylinder inlet filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-9
4.7.4 Replace cylinder check valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-9
4.7.5 Replace 3rd-gas cylinder supply module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
4.8 Replace system switch assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
iv 07/04 1009-0356-000
Table of Contents
4.9 Service the flowmeter module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
4.9.1 Remove front flowmeter panel shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
4.9.2 Remove flowtubes for cleaning or replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
4.9.3 Remove complete flowmeter head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
4.9.4 Replace flowmeter modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
4.9.5 Replace flowmeter frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
4.9.6 Replace O2 supply switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
4.9.7 Checkout procedure for O2 supply switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
4.9.8 Replace secondary regulator manifold or balance regulator manifold . . . . . . . 4-22
4.9.9 Replace O2 or N2O needle valves (on machines with N2O) . . . . . . . . . . . . . . . . . 4-23
4.9.10 Replace an Air needle valve on all machines or an O2 needle valve on machines
without N2O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
4.10 Service vaporizer manifold parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
4.10.1 Repair manifold port valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
4.10.2 Checkout procedure for manifold port valve . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
4.10.3 Replace vaporizer manifold check valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
4.10.4 Replace vaporizer pressure relief valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
4.10.5 Replace vaporizer manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
4.11 Replace ACGO selector switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
4.12 Clean or replace ACGO port flapper valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34
4.13 Reconfigure sample gas return line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35
4.14 Replace the APL valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36
4.15 Replace the bag support arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37
4.15.1 Servicing the bag support arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38
4.15.2 Replace friction pad in lower bag arm assembly . . . . . . . . . . . . . . . . . . . . . . . . 4-39
4.15.3 Replace bag port housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40
4.16 Replace auxiliary O2 flowmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41
4.17 Replace the suction control module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
4.17.1 Front panel method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
4.17.2 Rear panel method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43
4.18 Replace ABS breathing system components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44
4.18.1 Replace Bag/Vent switch assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44
4.18.2 Replace bellows base latch assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45
4.19 Replace casters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46
4.20 Replace task light and switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
4.20.1 To replace the task-light switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
4.20.2 To replace the task-light circuit board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
1009-0356-000 07/04 v
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5 Maintenance
4.21 Replace the display arm or display cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48
4.21.1 Cable tie installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48
4.21.2 Removing the display arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49
4.21.3 Replacing a display cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49
4.21.4 Installing the long arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-50
4.21.5 Installing the short arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-51
4.22 Replace display and cables in ProTIVA machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52
5.1 Aespire Planned Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
5.1.1 Every twelve (12) months . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
5.1.2 Every twenty-four (24) months . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
5.2 Auxiliary O2 flowmeter tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
5.3 Integrated Suction Regulator tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
6 Calibration
6.1 Primary Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
6.1.1 Test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
6.1.2 Testing Primary Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
6.1.3 Adjusting Primary Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
6.2 Secondary Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
6.2.1 Testing/Adjusting Secondary Regulators or Balance Regulators . . . . . . . . . . . . . .6-7
6.3 Flowmeter Needle Valve Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
6.3.1 O2 Needle Valve Calibration (Minimum Flow) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
6.3.2 N2O Needle Valve Calibration (Minimum Flow). . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
6.3.3 Air Needle Valve Calibration (Minimum Flow) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
6.3.4 Needle Valve Calibration (Maximum Flow) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
6.4 Link system calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
6.5 O2 Flush Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23
6.6 Airway pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24
6.6.1 Zero the pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24
6.6.2 Checking the pressure gauge accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25
7 Troubleshooting
7.1 General Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
7.2 Breathing System Leak Test Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4
7.2.1 Breathing system leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-5
7.2.2 Breathing System Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-7
7.2.3 Leak Isolation Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12
vi 07/04 1009-0356-000
8 Illustrated Parts
Table of Contents
8.1 Service tools — Anesthesia machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
8.1.1 Test Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
8.1.2 Test Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-4
8.1.3 Secondary regulator pilot pressure tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5
8.2 External components - front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-6
8.3 External components - front view references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-7
8.4 External Components - rear view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-8
8.5 Control module mounting for a ProTIVA machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9
8.6 Aespire 100 - exclusive components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
8.6.1 AC Inlet (Aespire 100). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12
8.6.2 Display mount (Aespire 100) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13
8.7 Front panel, gauges and system switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14
8.8 Rear panel components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15
8.9 Tabletop components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16
8.10 Right-side Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17
8.11 External components - lower assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18
8.12 Vent Engine Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19
8.13 Display cables, serial board, AGSS flowtube, and sample return . . . . . . . . . . . . . . . . . 8-20
8.14 AC Power cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21
8.15 AC Inlet/Outlet Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
8.16 Pipeline inlet fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24
8.17 Cylinder Gas Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25
8.17.1 Cylinder inlet fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26
8.18 Vaporizer manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-27
8.19 Flowmeter components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-28
8.19.1 Flowtube parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-30
8.19.2 Secondary regulator components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-32
8.20 ABS to machine Interface Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-34
8.20.1 Flush Regulator, Flush Valve, and ACGO Selector Switch . . . . . . . . . . . . . . . . . 8-35
8.21 Breathing system interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-36
1009-0356-000 07/04 vii
S/5 Aespire
8.22 Breathing System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-37
8.22.1 APL Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-37
8.22.2 Bag/Vent Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-38
8.22.3 Absorber canister . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-39
8.22.4 Flow Sensor Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-40
8.22.5 Breathing Circuit Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-41
8.22.6 Exhalation valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-42
8.22.7 Bellows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-43
8.22.8 Bellow base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-44
8.22.9 Bag Arms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-45
8.23 Drawer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-46
8.24 Legris quick-release fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-47
8.25 Vent Drive and low-pressure tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-48
8.26 Tubing for use with Legris fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-50
8.27 Cables and harnesses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-52
8.28 Cables and harnesses (Aespire 100) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-54
8.29 Anesthetic Gas Scavenging System — AGSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-56
8.30 Integrated Suction Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-62
8.31 Auxiliary O2 Flowmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-65
8.32 Display mounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-66
8.33 Cable management arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-67
8.34 Display arm mounting kits for optional equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-68
9 Schematics and Diagrams
8.29.1 Passive AGSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-56
8.29.2 Adjustable AGSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-58
8.29.3 Active AGSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-60
8.30.1 Major Components (Continuous and Venturi suction) . . . . . . . . . . . . . . . . . . . . 8-62
8.30.2 Suction Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-63
8.30.3 Venturi assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-64
viii 07/04 1009-0356-000
1
Introduction
In this section
This section provides a general overview of the S/5 Aespire Anesthesia Machine.
1.1 What this manual includes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2 Standard service procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2.1 User’s Reference Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2.2 Technical Reference Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.3 What is an S/5 Aespire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.3.1 Aespire 100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.3.2 S/5 ProTIVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.4 Configuration options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
1.4.1 Standard configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
1.4.2 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
1.5 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
1.6 Symbols used in the manual or on the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
1009-0356-000 07/04 1-1
S/5 Aespire
1.1 What this manual includes
Anesthesia Machine
Ventilator
S/5 ProTIVA
Other equipment
This manual covers the service information for the S/5 Aespire line of
anesthesia machines. It covers the following components:
• gas delivery components,
• breathing system components,
• frame component (except those strictly associated with a specific
ventilator),
• optional suction regulator and auxiliary O
The ventilator associated with the S/5 Aespire machine has its own Technical
Reference Manual:
• for the7100 Ventilator see manual 1006-0836-000.
The ProTIVA machine is configured with standard Aespire machine
components, with the exception of the vaporizer manifold and the Ventilator/
Monitoring Display (7100 Control Module) mounting solution
(refer to Section 8.5).
B Braun equipment is not covered in this manual. Refer to B Braun service
documentation.
Other equipment may be attached to the system on the display mount, the
top shelf, or on the side dovetail rails. Consult separate documentation
relative to these items for details.
flowmeter.
2
1.2 Standard service procedures
1.2.1 User’s Reference
Manuals
1.2.2 Technical
Reference Manuals
Some sections of this manual refer you to the User’s Reference Manual for the
S/5 Aespire. To expedite repairs, you must have, and be familiar with, the
User’s Reference Manuals for this product.
Refer to the S/5 Aespire User’s Reference Manual if you need further
information about the operation of the system.
You must first determine where a problem is located before you can determine
which Technical Reference Manual to use:
• Use this manual for machine and breathing system related issues.
• Use the 7100 Ventilator manual for ventilator related issues.
1-2 07/04 1009-0356-000
1.3 What is an S/5 Aespire
The S/5 Aespire is a compact, integrated and intuitive anesthesia delivery
system. The ventilator portion provides mechanical ventilation to a patient
during surgery as well as monitoring and displaying various patient
parameters.
The system uses a microprocessor-controlled ventilator with internal
monitors, electronic PEEP, Volume Mode, and other optional features. A serial
interface permits communication to cardiovascular and respiratory gas
monitoring.
1 Introduction
Note
1.3.1 Aespire 100
1.3.2 S/5 ProTIVA
Configurations available for this product depend on local market and
standards requirements. Illustrations in this manual may not represent all
configurations of the product.
The S/5 Aespire is not suitable for use in an MRI environment.
The Aespire 100 machine is based on the standard S/5 Aespire machine with
the following exceptions to available features or options:
• does not include the RS232 Serial Interface
• does not include the Bi-level LED light strip
• the 2 Vap manifold is standard (does not support 1 Vap manifold)
• not available with AC power outlets (area used by AC Inlet)
• uses 4-inch casters instead of 5-inch casters
The S/5 ProTIVA is a special adaptation of the S/5 Aespire machine for use
with B Braun intravenous drug delivery components.
1009-0356-000 07/04 1-3
S/5 Aespire
1.4 Configuration options
1.4.1 Standard
configuration
1.4.2 Options
The standard configuration includes the following items.
Items marked with an asterisk (*) are not included in the Aespire 100
machine.
• 7100 Ventilator
• Advanced Breathing System (ABS)
• Auxiliary Common Gas Outlet (ACGO)
• Serial Interface - RS232*
• Bi-level LED light strip*
• Two large drawers
Options include the following items.
Items marked with an asterisk (*) are not available in the Aespire 100
machine).
• selected software features
• vaporizer manifold (1 Vap* or 2 Vap)
• pipeline configurations (O2/N2O, O2/Air, or O2/N2O/Air)
• gas cylinder configurations (two inboard, one outboard)
• inboard configuration = O
• outboard configuration = N2O only
•manual bag (on support arm or on tube)
• gas scavenging (active, adjustable, passive, or venturi)
•a suction regulator (pipeline vacuum or venturi vacuum)
• an auxiliary O
• localized electrical power outlets* (isolated or non-isolated)
• various display mounting solutions
flowmeter
2
O, O2/Air, or O2/O
2/N2
2
1.5 Components
The following figures show the front and rear views of the machine.
There are some differences between models.
Figure 1-1 •S/5 Aespire (front view - left side)
Figure 1-2 •S/5 Aespire (front view - right side)
Figure 1-3 •S/5 Aespire (rear view)
Figure 1-4 •S/5 ProTIVA with a typical B Braun fluid manager (fm) system
1-4 07/04 1009-0356-000
18
17
16
15
14
13
12
11
10
1 Introduction
1
2
AB.74.054
9
8
1. Auxiliary common gas outlet (ACGO) switch
2. ACGO
3. Inspiratory check valve
4. Inspiratory flow sensor or flow port adapter
5. Canister (carbon dioxide absorbent)
6. Canister release
7. Expiratory flow sensor or flow port adapter
8. Leak test plug
9. Expiratory check valve
10. Breathing system release
11. Manual bag port
12. APL (adjustable pressure-limiting) valve
13. Bag/Vent switch
14. Bellows assembly
15. Pressure gauge (airway)
16. Sample gas return port
17. Scavenging flow indicator
18. RS-232 Serial port
((((nnnnooootttt aaaavvvvaaaaiiiillllaaaabbbblllleeee iiiinnnn tttthhhheeee AAAAeeeessssppppiiiirrrreeee 111100000000 mmmmaaaacccchhhhiiiinnnneeee))
76 5
4
))
3
Figure 1-1 • S/5 Aespire (front view - left side)
1009-0356-000 07/04 1-5
S/5 Aespire
3
2
4
5
6
1
10
11
AB.74.053
7
9
8
1. ABS (Advanced Breathing System)
2. Flow controls
3. Ventilator Display/Control Module
4. Dovetail rails
5. Vaporizer
6. Pipeline pressure gauge(s) (upper row)
7. System switch
8. Cylinder pressure gauge(s) (lower row)
9. O
Flush
2
10. Auxiliary O
flowmeter
2
11. Suction regulator
Figure 1-2 • S/5 Aespire (front view - right side)
1-6 07/04 1009-0356-000
1 Introduction
AC Inlet for Aespire 100 machine
567
1
2
3
AB.74.004
5
6
7
1. Circuit Breaker for Electrical Outlets*
2. Electrical Outlets*
3. Pipeline Connection(s)
4. Cylinder Supplies
5. System Circuit Breaker (
6. Mains Inlet
7. Equipotential Stud
* Items marked with an asterisk (*) are not available in the Aespire 100 machine.
AAAACCCC IIIInnnnlllleeeetttt ffffuuuusssseeeessss ffffoooorrrr AAAAeeeessssppppiiiirrrreeee 111100000000 mmmmaaaacccchhhhiiiinnnneeee)
4
Figure 1-3 • S/5 Aespire (rear view)
1009-0356-000 07/04 1-7
S/5 Aespire
3
AB.97.009
5
2
4
1
AB.97.002
1. Ventilator/Monitoring display
2. Syringe pumps (3)
3. fm controller
4. fm computer
5. fm segment
Figure 1-4 • S/5 ProTIVA with a typical B Braun fluid manager (fm) system
1-8 07/04 1009-0356-000
1.6 Symbols used in the manual or on the equipment
1 Introduction
m
L
l
n
Warnings and
w
occur if you do not follow all instructions in this manual.
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.
Other symbols replace words on the equipment or in Datex-Ohmeda manuals.
No one device or manual uses all of the symbols. These symbols include:
On (power)
Off (power)
Standby
Standby or preparatory state for part of
the equipment
Cautions tell you about dangerous conditions that can
w
Alarm silence button
A
Alarm silence touch key (Tec 6).
j
J
Type B equipment
Type BF equipment
M
N
†
p
x
y
P
Y
“ON” only for part of the equipment
“OFF” only for part of the equipment
Direct current
Alternating current
Protective earth ground
Earth ground
Frame or chassis ground
Equipotential
D
w
wW
O
Type CF equipment
Caution, ISO 7000-0434
Attention, refer to product instructions,
IEC 601-1
Dangerous voltage
Electrical input
Electrical output
Pneumatic input
Pneumatic output
1009-0356-000 07/04 1-9
S/5 Aespire
+
-
t
T
g
o
z
Plus, positive polarity
Movement in one direction
k
Minus, negative polarity
Movement in two directions
E
Variability Read top of float
Variability in steps Vacuum inlet
This way up Suction bottle outlet
Lamp, lighting, illumination
Cylinder
Lock
Isolation transformer
Z
U
u
134°C
Í
q
t
Unlock
Close drain
Open drain (remove liquid)
Autoclavable
Not autoclavable
Inspiratory flow
O2 sensor connection
r
O2+
Linkage system
Risk of Explosion.
Low pressure leak test
Mechanical ventilation
Bag position/ manual ventilation
R
Expiratory flow
Q
O2 Flush button
REF
1-10 07/04 1009-0356-000
Stock Number
SN
Serial Number
1 Introduction
< 414 kPa
Alarm silence touch key Volume alarms On/Off touch key
End case touch key Menu touch key
Circle breathing circuit module Bain/Mapleson D breathing circuit
module
< 345 kPa
The primary regulator is set to pressure
less than 345 kPa (50 psi)
Absorber on
Absorber off (CO
Bypass active)
2
European Union Representative
The primary regulator is set to pressure
less than 414 kPa (60 psi)
Bypass Option
CO
2
Systems with this mark agree with the
European Council Directive (93/42/
EEC) for Medical Devices when they
are used as specified in their
Operation and Maintenance Manuals.
The xxxx is the certification number of
the Notified Body used by DatexOhmeda’s Quality Systems.
1009-0356-000 07/04 1-11
Notes
1-12 07/04 1009-0356-000
2 Theory of Operation
In this section 2.1 Theory overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2.2 Gas flow through the anesthesia machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2.2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2.2.2 Physical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
2.2.3 Venturi Suction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
2.2.4 System switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
2.2.5 Flow control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
2.3 Flow through the breathing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2.3.1 Overview of flow paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2.3.2 Manual ventilation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2.3.3 Mechanical ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
2.3.4 Fresh gas and O2 flush flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
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2.1 Theory overview
This section describes:
• The flow of gas through the anesthesia machine.
• The flow of gas through the breathing system.
• Electrical signals between the anesthesia machine, including the breathing
system, and the ventilator.
2.2 Gas flow through the anesthesia machine
2.2.1 Overview Refer to Figure 2-1.
Gas supplies Gas comes into the system through a pipeline (2) or cylinder (4) connection.
All connections have indexed fittings, filters, and check valves (one-way
valves). Gauges show the pipeline (1) and cylinder (3) pressures.
A primary regulator (5) decreases the cylinder pressures to approximately
pipeline levels. A pressure relief valve (6) helps protect the system from high
pressures.
To help prevent problems with the gas supplies:
• Install yoke plugs on all empty cylinder connections.
•When a pipeline supply is adequate, keep the cylinder valve closed.
O2 flow Pipeline or regulated cylinder pressure supplies O
(7a for O
connection. An additional regulator (13) decreases the pressure for the flush
valve (14a) and the auxiliary flowmeter (25).
The flush valve supplies high flows of O
when you push the flush button. The flush pressure switch (14b) monitors
activation of the flush valve.
When the system switch (8) is On, O
A secondary regulator (10) supplies a constant O
control valve (11). There is a minimum flow of 25 to 75 mL/min (for dual-tube
flowmeters) or 175 to 225 mL/min (for single-tube flowmeters) through the
O
2
The O
too low, an alarm appears on the ventilator display.
drive gas) and the venturi suction (21a for O2 drive gas) supply
2
to the fresh gas outlet (26 or 27)
2
flows to the rest of the system.
2
flowmeter (12).
pressure switch (9) monitors the O2 supply pressure. If the pressure is
2
directly to the ventilator
2
pressure to the O2 flow
2
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2 Theory of Operation
Air and N2O flow Pipeline or regulated cylinder pressure supplies Air directly to the ventilator
(7b for Air drive gas) and the venturi suction (21b for Air drive gas) supply
connection.
When the system switch (8) is On, air flows to the rest of the system.
A secondary regulator (18) supplies the Air flow control valve (19). Because
there is no balance regulator, air flow continues at the set rate during an O2
supply failure.
A balance regulator (15) controls the N
control valve(16). The O
secondary regulator pressure at a pilot port controls
2
the output of the balance regulator. The N
decreasing O
supply pressure and shuts off hypoxic gas flow before the O2
2
O supply pressure to the N2O flow
2
O output pressure drops with
2
supply pressure reaches zero.
A chain link system (Link-25) on the N
keep the O
concentration higher than 21% (approximate value) at the
2
O and O2 flow controls (16, 11) helps
2
common gas outlet.
Mixed gas The mixed gas goes from the flowmeter outlet, through the vaporizer manifold
and vaporizer (23) that is On, to the ACGO selector switch (E). A pressure relief
valve (24) sets the maximum outlet pressure.
The ACGO selector switch directs the mixed gas to the selected circuit — to the
breathing system (26) or to the ACGO (27).
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Key to Numbered Components 1. Pipeline pressure gauge
2. Pipeline inlet
3. Cylinder pressure gauge
4. Cylinder inlet (maximum of 3 cylinders)
5. Primary regulator (cylinder pressure)
6. High-pressure relief valve (758 kPa / 110 psi)*
7. Supply connections for the ventilator
a. O
drive gas
2
b. Air drive gas
8. System switch
9. Switch for low O
10. O
secondary regulator (207 kPa / 30 psi)*
2
11. O
flow control valve
2
12. O
flow tube(s)
2
13. O
flush and auxiliary flowmeter regulator (241 kPa / 35 psi)*
2
14. O
Flush
2
a. Flush valve
b. Pressure switch (used with the ventilator)
15. N
O balance regulator
2
16. N
O flow control valve
2
17. N
O flow tube(s)
2
18. Air secondary regulator (207 kPa / 30 psi)*
19. Air flow control valve
20. Air flow tube(s)
21. Supply connection for Venturi suction
a. O
drive gas
2
b. Air drive gas
22. Vaporizer port valve
23. Vaporizer
24. Low-pressure relief valve (38 kPa / 5.5 psi)*
25. Auxiliary flowmeter (optional)
26. To ABS
27. To ACGO
28. Test port (primary regulator)
29. Test port (secondary/balance regulator)
* Approximate values
supply pressure alarm (used with the ventilator)
2
Key to Symbols
Pneumatic Connection
Filter
Direction of Flow
Check Valve
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N2O
Air O2 O2
4444
3333
2 Theory of Operation
5
A
5
A
A
28 28 28 28
2
6
B
1
2
6
B
7b
C
9151810
29
11
Link 25
29
16
Link 25
5
1
21b
29
19
5
25
A
2
6
B
1
21a
7a
13
8
14b
14a
E
26
12
17 20
24
27
D
22 22
22 22
AB.74.041
A. Cylinder Supplies
23
B. Pneumatic Manifold
C. Flowmeter Head
D. Vaporizer Manifold
E. ACGO Select Switch
Figure 2-1 • Pneumatic circuit
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23
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2.2.2 Physical
connections
Figure 2-2 shows the physical path that the gas takes.
AB.74.030
O
N2OAir
2
N2O
O
2
Air
Vent Drive
Figure 2-2 • Typical tubing connections - pictorial
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2.2.3 Suction regulators Pipeline vacuum
The suction regulator (shown in Figure 2-2) uses an external vacuum source.
Venturi Drive vacuum
The suction regulator (shown in Figure 2-3) uses an internal, venturi derived
vacuum source.
2 Theory of Operation
Venturi Drive Gas
Air or O
Drive gas (internally plumbed Air or O
) enters the Venturi Module (VM) at the
2
drive port (A). As the drive gas passes through the venturi module, a vacuum
is created at port B. The drive gas exits the venturi module at port C and is
exhausted outside the machine through the muffler (D).
The control port (E) on the venturi module responds to pneumatic signals from
the front panel switch on the Suction Control Module (SCM) to turn the venturi
vacuum drive gas on or off. The check valve (CV) helps prevent pressurization
of the suction circuitry if the exhaust is occluded or the venturi unit fails.
E
A
2
B
CV
VM
SCM
C
Figure 2-3 • Venturi suction
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Suction
AB.74.049
D
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2.2.4 System switch The system switch has two positions: On and Standby.
In the Standby position The switch:
• Turns off the ventilator (electrical).
• Stops O2 and Air to the flowhead (pneumatic).
•Without O
In the On position The switch:
• Turns on the ventilator (electrical).
• Supplies O
•With adequate O
pressure, the N2O balance regulator stops N2O.
2
and Air to the flowhead.
2
pressure, the N2O balance regulator supplies N2O.
2
System Switch
(electrical)
System Switch
(pneumatic)
O2 Out (Port 4)
Air Out (Port 4)
Air In (Port 3)
O
In (Port 3)
2
(Rear View)
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Wiring Harness
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