Puritan Bennett Tyco HELIOS Reservoir User manual

Puritan-Bennett Corp.
2800AirwestBlvd.
Plainfield, IN 46168
Customer Service:
1-800-635-5267, press 2
Technical Support:
1-800-255-6774, press 2
Part Number B-701693-00 Rev. C (10/02)
©2002 Puritan-Bennett Corp.
ECHNICAL MANUAL
HELiOS™LiquidOxygenReservoirs
(Standard and Universal)
HELiOS™LiquidOxygenPortables
CAUTION: Federal (U.S.A.) laws restricts this
device to sale by or on the order of a
physician.
!

B-701693-00 Rev. C
This list of effective pages represents manual P/N B-701693-00, Revision C.
Revision Description Date
A Initial Release 05-00
B Page Information Changes 10-01
C Universal Res. & Parts Illus. Changes 10-02
Effective Pages Revision Effective Pages Revision
Title Page C 11-1 A
ii C 11-2, 11-3 B
iii A 12-1, 12-2 A
iv to x C 12-3 to 12-8 C
1-1 to 1-3 C 12-9, 12-10 A
1-4 to 1-12 A 12-11 to 12-25 C
1-13 to 1-19 B 13-1 to 13-8 C
1-20 to 1-22 A
2-1 to 2-4 C
2-5 B
2-6 to 2-8 C
2-9 B
2-10 to 2-17 C
3-1, 3-2 C
3-3 A
3-4 to 3-15 C
4-1 to 4-13 C
5-1 to 5-3 C
6-1, 6-2 A
6-3 to 6-9 C
6-10 A
6-11 to 6-22 C
7-1 to 7-8 C
8-1 A
8-2, 8-3 B
8-4 to 8-6 A
8-7 to 8-12 B
9-1, 9-2 A
9-3 B
9-4 to 9-7 A
9-8 to 9-14 B
10-1 B
10-2 to 10-10 C
10-11 A
NOTE: SI pressure values expressed in manual are referenced to
atmosphere.
HELiOS™, Companion®, and Teleview™ are trademarks of PURITAN-BENNETT CORP.
SNOOP® is a trademark of the SWAGELOK Co.
Teflon® and Krytox® are trademarks of E. I. DUPONT DE NEMOURS & Co.
Kel-F® and Scotch-Brite™ are trademarks of the 3M Co.
Magnehelic® is a trademark of the DWYER INSTRUMENT Co.
QUICK-GRIP® is a trademark of the AMERICAN TOOL Co.
Sporicidin® is a trademark of SPORICIDIN INTERNATIONAL.
LIST OF EFFECTIVE PAGES
ii

B-701693-00 Rev. A
DEFINITION OF STATEMENTS
Statements in this manual preceded by the following words are of special
significance:
WARNING
A warning describes conditions that concern your personal
safety and the safety of others. It includes the actions required to
prevent injury. Ignoring warnings can lead to injury or death.
CAUTION: A caution informs you about conditions that may
cause possible damage to the equipment or other property, or
situations that may cause reduced or no oxygen flow.
NOTE: Notes provide important information about using the equipment properly.
iii
!
!
DEFINITION OF PRODUCT SYMBOLS
SYMBOL DEFINITION SYMBOL DEFINITION
Reservoir Full Do not smoke near unit
Keep unit well venti-
Reservoir Empty lated at all times
Do not touch frosted
Portable Full parts
Portable Empty Keep unit in upright
position
Low Battery (9VDC)
Keep unit upright,
flat on its back, or any
Drip Proof position in between
Type BF
(Electrical Safety)

B-701693-00 Rev. C
This manual provides the information needed to service the Puritan Bennett HELiOS
Standard Reservoir, Universal Reservoir, and H300 Portable units. Information in the first
section of this manual covers both the Reservoir and the Portable units. Information in
Sections 2 through 7 covers just the Reservoir unit. Information in Sections 8 through 13
covers just the HELiOS 300 Portable unit. This information is intended for use by
technicians or personnel qualified to repair and service medical liquid oxygen equip-
ment. Do not attempt to fill or repair these units until you read and understand the
information in this manual.
The following document contains additional information useful in servicing this equip-
ment:
• HELiOS Oxygen System Operating Instructions: P/N B-701641-00
For product assistance contact: Puritan-Bennett Corp.
2800 Airwest Blvd.
Plainfield, IN 46168
Customer Service:
1-800-635-5267, press 2
Technical Support:
1-800-255-6774, press 2
www.heliosoxygen.com
NOTE: HELiOS Reservoir and Portable units are intended only for the delivery of
medical grade oxygen as prescribed by a physician.
WARNING
Improper usage hazard. Oxygen supplied from this equipment is
for supplemental use and is not intended to be life supporting or
life sustaining. This equipment is not intended for use by patients
who would suffer immediate, permanent, or serious health conse-
quences as a result of an interruption in their oxygen supply.
CAUTION: Consistent with the recommendations of the medical
community on the use of conserving devices (which includes the
nasal cannula), it is recommended that the HELiOS system be
qualified on patients in the situations it will be used (rest, exercise,
sleep). Differences in nasal cannula design may vary the ability to
trigger a conserving device.
Information contained in this document, including performance specifications, is subject
to change without notice. Puritan-Benett makes no warranty of any kind with regard to the
material in this manual, including, but not limited to, the implied warranties of salability
and fitness for a particular purpose. Puritan-Bennett shall not be liable for errors contained
herein or for incidental or consequential damages in connection with either providing this
manual or the use of material in this manual. HELiOS is a trademark of Puritan-Bennett
Corp. The information contained in this manual is the sole property of Puritan-Bennett
and may not be reproduced without the permission of the company. Copyright© 2002 by
Puritan-Bennett Corp. All rights reserved.
PREFACE
iv
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!

B-701693-00 Rev. C
Section 1 –Introduction to the HELiOS System
1.1 HELiOS System Description ............................................................................ 1-1
1.2 Serial Number Identification ............................................................................ 1-3
1.3 Safety Precautions ........................................................................................... 1-4
1.3.1 Cold Safety .............................................................................................. 1-4
1.3.2 Expansion Safety ..................................................................................... 1-5
1.3.3 Fire Safety ................................................................................................ 1-5
1.4 Liquid Oxygen Saturation Principles ................................................................ 1-7
1.5 Pressure Fittings and Connections .................................................................. 1-9
1.5.1 Compression Fitting Makeup .................................................................. 1-9
1.5.2 Compression Fitting Remake ................................................................... 1-10
1.5.3 Compression Fitting Troubleshooting .................................................... 1-10
1.5.4 Tapered Pipe Thread (NPT) Makeup ....................................................... 1-11
1.5.5 Tapered Pipe Thread Troubleshooting .................................................... 1-12
1.5.6 Flexible Tube Barbed Fitting Makeup ...................................................... 1-12
1.5.7 Flexible Tube Removal from Barbed Fitting ............................................. 1-12
1.6 Recommended Tools, Test Equipment, and Service Materials ......................... 1-12
1.7 Test Equipment Calibration .............................................................................. 1-17
1.8 Accessories ..................................................................................................... 1-18
Section 2 – Reservoir General Information
2.1 Product Description ......................................................................................... 2-1
2.1.1 HELiOS Standard Reservoir ..................................................................... 2-1
2.1.2 HELiOS Universal Reservoir .................................................................... 2-2
2.2 Performance Specifications .............................................................................. 2-3
2.3 Unpacking, Installation, Repacking ................................................................. 2-4
2.3.1 Unpacking ............................................................................................... 2-4
2.3.2 Installation ............................................................................................... 2-4
2.3.3 Repacking for Return ............................................................................... 2-5
2.4 Controls, Indicators, and Connectors .............................................................. 2-5
2.4.1 Fill Connector .......................................................................................... 2-5
2.4.2 Release Button ........................................................................................ 2-5
2.4.3 Vent Valve ................................................................................................ 2-6
2.4.4 Pressure Indicator (Standard Reservoir Only) ......................................... 2-6
2.4.5 Contents Indicator ................................................................................... 2-6
2.4.6 Oxygen Outlet .......................................................................................... 2-6
2.4.7 Moisture Container .................................................................................. 2-6
2.5 Filling Instructions ........................................................................................... 2-7
2.5.1 Oxygen Source Requirements .................................................................. 2-7
2.5.2 Transfer Line ........................................................................................... 2-9
2.5.3 Pre-Fill Inspection .................................................................................... 2-10
2.5.4 Filling Procedure ...................................................................................... 2-11
2.5.5 Post-Fill Inspection .................................................................................. 2-14
2.5.6 Checking Saturation Pressure .................................................................. 2-14
2.5.7 Resaturating Liquid Oxygen .................................................................... 2-15
2.6 Operating Procedures ...................................................................................... 2-15
2.7 Maintenance .................................................................................................... 2-16
TABLE OF CONTENTS
v

3 – Reservoir Theory of Operation
3.1 Reservoir Components .................................................................................... 3-1
3.1.1Cryogenic Container ................................................................................. 3-1
3.1.2 Fill Connector/Quick Connect ................................................................. 3-2
3.1.3 Vent Valve ................................................................................................ 3-3
3.1.4 Relief/Economizer Valve ........................................................................... 3-3
3.1.5 Secondary Relief Valve ............................................................................ 3-5
3.1.6 Pressure Regulator (Standard Reservoir Only) ........................................ 3-5
3.1.7 Warming Coil ........................................................................................... 3-6
3.1.8 Oxygen Outlet w/Poppet Valve ................................................................ 3-6
3.1.9 Pressure Indicator (Standard Reservoir Only) ......................................... 3-7
3.1.10 Contents Indicator ................................................................................. 3-7
3.2 Reservoir Operation ......................................................................................... 3-8
3.2.1 Filling the Reservoir ................................................................................. 3-8
3.2.2 Fill Termination ........................................................................................ 3-10
3.2.3 Standby ................................................................................................... 3-11
3.2.4 Gaseous Oxygen Use ............................................................................... 3-12
3.2.5 HELiOS Reservoir Operation Over 24 Hours ........................................... 3-14
4 – Reservoir Performance Verification
4.1 Equipment Required ........................................................................................ 4-1
4.2 Leak Tests ........................................................................................................ 4-2
4.2.1 Liquid Leak Detector Test ........................................................................ 4-2
4.2.2 Pressure Hold Test (Alternate Leak Test) ................................................ 4-5
4.3 Gaseous Oxygen Functional Tests .................................................................. 4-6
4.3.1 Primary Relief Valve Test ......................................................................... 4-6
4.3.2 Secondary Relief Valve Test .................................................................... 4-7
4.3.3 Pressure Indicator Test (Standard Reservoir Only) ................................. 4-8
4.3.4 Pressure Regulator Test (Standard Reservoir Only) ................................ 4-8
4.3.5 Flow Restrictor Test ................................................................................. 4-9
4.4 Liquid Oxygen Functional Tests ...................................................................... 4-10
4.4.1 Contents Indicator Test ........................................................................... 4-10
4.4.2 Normal Evaporation Rate (NER) Test ....................................................... 4-11
4.4.3 Economizer Test ....................................................................................... 4-12
5 – Reservoir Troubleshooting
6 – Reservoir Service and Repair
6.1 Emptying a Reservoir Unit ............................................................................... 6-1
6.2 Shroud Assembly ............................................................................................ 6-3
6.2.1 Upper Shroud Removal ............................................................................ 6-3
6.2.2 Upper Shroud Service .............................................................................. 6-3
6.2.3 Upper Shroud Installation ....................................................................... 6-3
6.2.4 Lower Shroud Removal ............................................................................ 6-3
6.2.5 Lower Shroud Installation ....................................................................... 6-4
6.3 Contents Indicator ........................................................................................... 6-5
vi B-701693-00 Rev. C

6.3.1 Removal ................................................................................................... 6-5
6.3.2 Service ..................................................................................................... 6-6
6.3.3 Installation ............................................................................................... 6-6
6.4 Pressure Indicator (Standard Reservoir Only) ................................................. 6-7
6.4.1 Removal ................................................................................................... 6-7
6.4.2 Service ..................................................................................................... 6-7
6.4.3 Installation ............................................................................................... 6-7
6.5 Fill Connector Release Assembly .................................................................... 6-8
6.5.1 Removal ................................................................................................... 6-8
6.5.2 Installation ............................................................................................... 6-8
6.6 Male Fill Connector ......................................................................................... 6-8
6.6.1 Removal ................................................................................................... 6-8
6.6.2 Inspection ................................................................................................ 6-9
6.6.3 Service ..................................................................................................... 6-9
6.6.4 Disassembly ............................................................................................ 6-9
6.6.5 Reassembly .............................................................................................. 6-10
6.6.6 Installation ............................................................................................... 6-10
6.7 Vent Valve .......................................................................................................... 6-11
6.7.1 Removal ................................................................................................... 6-11
6.7.2 Inspection ................................................................................................ 6-11
6.7.3 Service ..................................................................................................... 6-11
6.7.4 Disassembly ............................................................................................ 6-11
6.7.5 Reassembly .............................................................................................. 6-12
6.7.6 Installation ............................................................................................... 6-12
6.8 Relief/Economizer (R/E) Valve ............................................................................ 6-13
6.8.1 Removal ................................................................................................... 6-13
6.8.2 Installation ............................................................................................... 6-13
6.8.3 R/E Valve Adjustment .............................................................................. 6-14
6.9 Secondary Relief Valve ...................................................................................... 6-16
6.9.1 Removal ................................................................................................... 6-16
6.9.2 Installation ............................................................................................... 6-16
6.10 Warming Coil ................................................................................................... 6-16
6.10.1 Removal ................................................................................................. 6-16
6.10.2 Installation ............................................................................................. 6-17
6.11 Economizer Tube Assembly ............................................................................ 6-17
6.11.1 Removal ................................................................................................. 6-17
6.11.2 Installation ............................................................................................. 6-18
6.12 Pressure Regulator (Standard Reservoir Only) ................................................ 6-18
6.12.1 Removal ................................................................................................. 6-18
6.12.2 Service ................................................................................................... 6-18
6.12.3 Installation ............................................................................................. 6-18
6.12.4 Adjustment ............................................................................................ 6-19
6.13 Oxygen Outlet Block (Universal Reservoir Only) ............................................ 6-20
6.13.1 Removal ................................................................................................. 6-20
6.13.2 Installation ............................................................................................. 6-20
6.14 Cryogenic Container ........................................................................................ 6-20
6.14.1 Removal ................................................................................................. 6-20
6.14.2 Installation ............................................................................................. 6-21
6.15 Purging the Container Liquid Sense Tube ....................................................... 6-21
vii
B-701693-00 Rev. C

8.4.2 Vent Valve ................................................................................................ 8-4
8.4.3 Contents Indicator ................................................................................... 8-4
8.4.4 Demand Flow Control .............................................................................. 8-4
8.4.5 Oxygen Supply Tube Quick Connect ...................................................... 8-4
8.4.6 Oxygen Outlet Connector ........................................................................ 8-5
8.4.7 Sense Connector ..................................................................................... 8-5
8.4.8 Dual-Lumen Cannula ............................................................................... 8-5
8.5 Filling Instructions ........................................................................................... 8-5
8.5.1 Pre-Fill Inspection .................................................................................... 8-6
8.5.2 Filling Procedure ...................................................................................... 8-6
8.5.3 Post-Fill Inspection .................................................................................. 8-9
8.6 Operating Procedures ...................................................................................... 8-9
8.7 Maintenance .................................................................................................... 8-11
9 – HELiOS 300 Theory of Operation
9.1 H-300 Portable Components ............................................................................ 9-1
9.1.1 Cryogenic Container ................................................................................ 9-1
9.1.2 Fill Connector/Quick Connect ................................................................. 9-2
9.1.3 Vent Valve ................................................................................................ 9-3
9.1.4 Relief/Economizer Valve ........................................................................... 9-4
9.1.5 Secondary Relief Valve ............................................................................ 9-5
9.1.6 Warming Coils ......................................................................................... 9-6
9.1.7 Demand Flow Control Valve .................................................................... 9-6
9.1.8 Oxygen Supply Tube Quick Connect and Inline Check Valve ................. 9-7
9.1.9 Contents Indicator ................................................................................... 9-8
9.2 H-300 Portable Operation ................................................................................. 9-9
9.2.1 Filling the HELiOS 300 ............................................................................. 9-9
9.2.2 Fill Termination ........................................................................................ 9-10
9.2.3 Standby ................................................................................................... 9-11
9.2.4 Gaseous Oxygen Use – H-300 Filled with Liquid Oxygen ........................ 9-12
9.2.5 Gaseous Oxygen Use – H-300 Connected to Oxygen Supply Tube ........ 9-14
7 – Reservoir Illustrated Parts List
Figure 7-1, HELiOS Standard Reservoir ........................................................... 7-3
Figure 7-2, HELiOS Standard Reservoir ........................................................... 7-4
Figure 7-3, HELiOS Standard Reservoir ........................................................... 7-5
Figure 7-4, HELiOS Universal Reservoir .......................................................... 7-6
Figure 7-5, HELiOS Universal Reservoir .......................................................... 7-7
Figure 7-6, HELiOS Universal Reservoir .......................................................... 7-8
8 - HELiOS 300 General Information
8.1 Product Description ......................................................................................... 8-1
8.2 Performance Specifications .............................................................................. 8-2
8.3 Unpacking, Installation, and Repacking .......................................................... 8-3
8.3.1 Unpacking ............................................................................................... 8-3
8.3.2 Installation ............................................................................................... 8-3
8.3.3 Repacking for Return ............................................................................... 8-3
8.4 Controls, Indicators, and Connectors .............................................................. 8-4
8.4.1 Fill Connector .......................................................................................... 8-4
viii B-701693-00 Rev. C

ix
10 – HELiOS 300 Performance Verification
10.1 Equipment Required ........................................................................................ 10-1
10.2 Leak Tests ........................................................................................................ 10-2
10.2.1 Liquid Leak Detector Test ...................................................................... 10-2
10.2.2 Pressure Hold Test (Alternate Leak Test) .............................................. 10-4
10.3 Gaseous Oxygen Functional Tests .................................................................. 10-4
10.3.1 Primary Relief Valve Test ........................................................................ 10-4
10.3.2 Secondary Relief Valve Test ................................................................... 10-5
10.4 Liquid Oxygen Functional Tests ...................................................................... 10-7
10.4.1 Contents Indicator Test ......................................................................... 10-7
10.4.2 Normal Evaporation Rate (NER) Test ..................................................... 10-8
10.4.3 Economizer Test ..................................................................................... 10-8
10.4.4 Demand Flow Control Valve Test ........................................................... 10-10
11 – HELiOS 300 Troubleshooting
12 – HELiOS 300 Service and Repair
12.1 Emptying an H-300 Unit ................................................................................... 12-1
12.2 Side Covers ...................................................................................................... 12-2
12.2.1 Removal ................................................................................................. 12-3
12.2.2 Disassembly – Front Side Cover ............................................................ 12-3
12.2.3 Reassembly – Front Side Cover ............................................................. 12-3
12.2.4 Disassembly – Rear Side Cover ............................................................. 12-4
12.2.5 Reassembly – Rear Side Cover .............................................................. 12-4
12.2.6 Installation ............................................................................................. 12-5
12.3 Contents Indicator ........................................................................................... 12-5
12.3.1 Removal ................................................................................................. 12-5
12.3.2 Inspection .............................................................................................. 12-5
12.3.3 Disassembly and Reassembly ................................................................ 12-5
12.3.4 Installation ............................................................................................. 12-5
12.4 Female Fill Connector and Tube ...................................................................... 12-5
12.4.1 Removal ................................................................................................. 12-6
12.4.2 Inspection .............................................................................................. 12-7
12.4.3 Service ................................................................................................... 12-7
12.4.4 Disassembly ........................................................................................... 12-7
12.4.5 Reassembly ............................................................................................ 12-9
12.4.6 Installation ............................................................................................. 12-11
12.5 Vent Valve and Tube ........................................................................................ 12-11
12.5.1 Removal ................................................................................................. 12-11
12.5.2 Inspection .............................................................................................. 12-12
12.5.3 Service ................................................................................................... 12-13
12.5.4 Disassembly ........................................................................................... 12-13
12.5.5 Reassembly ............................................................................................ 12-14
12.5.6 Installation ............................................................................................. 12-14
12.6 Relief/Economizer Valve ................................................................................... 12-14
12.6.1 Removal ................................................................................................. 12-15
12.6.2 Installation ............................................................................................. 12-15
12.6.3 R/E Valve Adjustment ............................................................................ 12-16
B-701693-00 Rev. C

x
12.7 Secondary Relief Valve ................................................................................. 12-19
12.7.1 Removal .............................................................................................. 12-19
12.7.2 Installation ......................................................................................... 12-19
12.8 Demand Flow Control Valve ......................................................................... 12-19
12.8.1 Removal .............................................................................................. 12-19
12.8.2 Service ................................................................................................ 12-20
12.8.3 Installation ......................................................................................... 12-20
12.8.4 Sensitivity Adjustment ...................................................................... 12-20
12.9 Warming Coils .............................................................................................. 12-22
12.9.1 Removal – Liquid Withdrawal Warming Coil ...................................... 12-22
12.9.2 Installation – Liquid Withdrawal Warming Coil .................................. 12-23
12.9.3 Removal – Gas Withdrawal Warming Coil .......................................... 12-23
12.9.4 Installation – Gas Withdrawal Warming Coil ...................................... 12-23
12.10 Oxygen Supply Tube Quick Connect & Inline Check Valve ......................... 12-23
12.10.1 Removal – Quick Connect ................................................................ 12-23
12.10.2 Installation – Quick Connect ............................................................ 12-24
12.10.3 Removal – Inline Check Valve .......................................................... 12-24
12.10.4 Installation – Inline Check Valve ...................................................... 12-24
12.11 Cryogenic Container ...................................................................................... 12-24
12.11.1 Removal ............................................................................................ 12-24
12.11.2 Installation ........................................................................................ 12-25
13 – HELiOS 300 Illustrated Parts List
Figure 13-1, HELiOS 300 Portable ................................................................. 13-3
Figure 13-2, HELiOS 300 Portable ................................................................. 13-4
Figure 13-3, HELiOS 300 Portable ................................................................. 13-5
Figure 13-4, HELiOS 300 Portable ................................................................. 13-6
Figure 13-5, HELiOS 300 Portable ................................................................. 13-7
Figure 13-6, HELiOS 300 Portable ................................................................. 13-8
Technical Bulletins
B-701693-00 Rev. C

B-701693-00 Rev. C Introduction to the HELiOS System - 1-1
HELiOS Liquid Oxygen System Technical Manual
The HELiOS is an innovative liquid oxygen system where the Reservoir and Portable unit
provide a new level of performance efficiency for oxygen therapy patients. This section
provides introductory information on the HELiOS liquid oxygen system. It includes a brief
system description; serial number identification; safety precautions; liquid oxygen
saturation fundamentals; pressure fittings and connections information; tool, test
equipment, and service material recommendations; test equipment calibration information;
and accessory information.
The information in this section relates to both the Reservoir and the Portable units.
Sections 2 through Section 7 provide technical and service information that is specific to
the HELiOS Standard Reservoir and Universal Reservoir units. Sections 8 through Section
13 provide technical and service information that is specific to the HELiOS 300 Portable
unit.
The HELiOS liquid oxygen system provides 24 hour per day reservoir and portable oxygen
therapy for a typical Chronic Obstructive Pulmonary Disease (COPD) patient. HELiOS
uses oxygen conservation and exclusive “no loss” technology to greatly improve
performance efficiency compared to conventional liquid oxygen systems. The HELiOS
Reservoir unit redefines the evaporative loss characteristics of home liquid oxygen
vessels and has features that enhance the safety and usability of the product. Using the
H300 Portable with a Standard HELiOS Reservoir will typically require less than one liquid
oxygen delivery to the patient per month. The HELiOS Universal Reservoir has many of
the same features as the Standard Reservoir plus it permits filling the H300 Portable as well
as the Puritan Bennett Companion 1000, Companion T, and Companion 500 series por-
tables. The HELiOS 300 Portable unit sets a new standard for size, weight, and range that
surpasses existing cylinder or liquid based portables.
INTRODUCTION TO THE HELiOS SYSTEM
Section
1
1.1 HELIOS SYSTEM DESCRIPTION
!
WARNING
Read Section 1, and any other applicable section, thoroughly
before attempting to service or fill a HELiOS Reservoir or Portable.
Failure to do so may result in injury or death.

1-2 - Introduction to the HELiOS System B-701693-00 Rev. C
HELiOS Liquid Oxygen System Technical Manual
Like today’s liquid oxygen systems, the HELiOS system consists of a Reservoir and a
Portable patient unit (Figure 1-1). However, the system components are capable of
working together rather than separately. The HELiOS 300 Portable fills from the Reservoir
for ambulatory use or connects to the Reservoir with a flexible oxygen supply tube for
home use. This provides the patient with the same familiar interface whether at home or
away.
Figure 1-1: HELiOS Reservoir and Portable
The patient receives oxygen from the H-300 Portable through a dual lumen cannula and a
pneumatic demand flow control system. The H-300 Portable provides 11 different oxygen
flow settings from .12 through 4 . Flow settings from 1 through 4 provide demand flow
oxygen to the patient on each inspiration. No oxygen flows during exhalation. Flow
settings less than 1 provide continuous oxygen flow (L/min) to the patient at the indi-
cated rate. The demand flow control system in a full H-300 Portable can provide a 2 L/min
patient with up to 10 hours of demand flow oxygen. This results in a 4:1 oxygen savings
while still providing adequate oxygen to meet the patient’s needs.
For ambulatory use, the patient fills the H-300 Portable with liquid oxygen from the
Reservoir. When full, it holds slightly less than one pound (454 grams) of liquid oxygen
and weighs a total of 3.6 pounds (1.6 kg). A spring scale type contents indicator shows
the amount of liquid oxygen remaining in the unit.
For oxygen needs in the home, the patient engages the H-300 Portable to a flexible oxygen
supply tube that connects to the oxygen outlet of the Reservoir. The H-300 Portable
provides the patient with the same familiar oxygen delivery interface but the patient now
breathes gaseous oxygen directly from the Reservoir. This makes the H-300 Portable about
one pound (454 grams) lighter since it contains no liquid oxygen. Also, evaporative
oxygen losses from the Reservoir are greatly reduced since the patient breathes the gas
that normally builds pressure and vents through the Reservoir relief valve.
Two HELiOS Reservoir models are available in both 36 liter and 46 liter sizes. The Standard
H-36 and H-46 Reservoirs provide the patient with both a means to fill a HELiOS Portable
with liquid oxygen and a source of regulated 22 psig (152 kPa) gaseous oxygen for
breathing with the H-300 Portable or other external 22 psig (152 kPa) flow-metering device.
The Universal U-36 and U-46 Reservoirs also provide the patient with both a means to fill
a HELiOS Portable with liquid oxygen and a source of 22 psig (152 kPa) gaseous oxygen.
In addition, lower internal pressure in the Universal Reservoir permits the filling of Puritan

B-701693-00 Rev. C Introduction to the HELiOS System - 1-3
HELiOS Liquid Oxygen System Technical Manual
Bennett Companion portables as well. At the push of a button, an electronic contents
indicator measures and displays the amount of liquid oxygen remaining in the Reservoir.
The H-36 Reservoir, when used with an H-300 Portable, typically yields a four week liquid
oxygen delivery cycle with a 2 L/min patient. The U-36 Reservoir, when used with an H-
300 Portable, typically yields almost a four week liquid oxygen delivery cycle with a 2 L/
min patient.
The H-46 Reservoir, when used with an H-300 Portable, can yield a six week liquid oxygen
delivery cycle with a 2 L/min patient. The U-46 Reservoir, when used with an H-300
Portable, can yield a five week liquid oxygen delivery cycle with a 2 L/min patient.
Each HELiOS Reservoir and H-300 Portable are identified by a unique eight-digit serial
number. The number contains the year and calendar day of manufacture, as well as the
unit’s production number for that day (Figure 1-2). The Standard Reservoir serial number
is etched into the upper head of the cryogenic container and is visible when the moisture
container is removed (Figure 1-3). The Universal Reservoir serial number is etched into a
Reservoir handle bracket. The H-300 Portable serial number is etched into the cryogenic
container and is visible through the contents indicator window in the rear side cover
(Figure 1-4).
Figure 1-2: Serial Number Scheme
1.2 SERIAL NUMBER IDENTIFICATION
Figure 1-3: Figure 1-4:
Standard Reservoir Serial Number Location H-300 Serial Number Location
Serial Number Serial Number
99 295 116
Designates
Year
Designates
Sequential Day of
Year (Jan 1 = 001,
Dec 31 = 365)
Designates
Number of Specific
Unit Produced
that day
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HELiOS Liquid Oxygen System Technical Manual
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1.3 SAFETY PRECAUTIONS
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This section covers precautions and safe practices as they apply to facilities and person-
nel involved in servicing medical oxygen equipment. These precautions are divided into
three main areas: cold safety, expansion safety, and fire safety. To ensure reliability and
safety, the service techniques, work area, and equipment used in the storage, service, and
handling of this system must be of the highest standard. Refer to the HELiOS Operating
Instructions (B-701641-00) for additional safety precautions regarding the use of this
equipment.
1.3.1 Cold Safety
WARNING
Extreme cold hazard. Liquid oxygen is extremely cold
(-297°F/-183°C) and will freeze skin on contact. Never
touch liquid oxygen or frosted parts.
WARNING
Extreme cold hazard. Liquid oxygen can spill if the
Reservoir is tipped over. Keep the Reservoir upright
at all times. Secure the Reservoir when transporting
to prevent accidental tip-over.
WARNING
Extreme cold hazard. Liquid oxygen can spill from the
Portable. Always keep the Portable in one of the
following positions; upright, flat on its back or any
position in between.
WARNING
Extreme cold hazard. Forceful discharge of liquid
oxygen possible if fill connector freezes open upon
disengagement. Always dry fill connectors with clean,
dry lint free cloth before fill.
Recommended Protective Clothing:
•Heavily insulated gloves (for example, cryogenic or welding gloves). Never use
gloves that are contaminated with grease or oil when working with liquid oxygen.
•Protective face shield and goggles.
•Long sleeve shirt. Wear natural fibers such as cotton or wool. Avoid synthetic
materials such as polyester or rayon.
•Long pants. Never wear pants with cuffs. Liquid oxygen may become trapped and
cause serious burns to skin. Wear natural fibers such as cotton or wool. Avoid
synthetic materials such as polyester or rayon.
•Protective cryogenic or welding apron.

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HELiOS Liquid Oxygen System Technical Manual
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Important Facts:
• Direct exposure to liquid oxygen or exposure to its vented gas or components cooled
by liquid oxygen can result in frostbite. If frostbite occurs, seek medical attention
immediately.
1.3.2 Expansion Safety
WARNING
Explosive hazard. Extreme high pressure can rupture
container or plumbing components. Be sure specified
pressure relief devices are present, in the proper
location, and functioning properly.
Important Facts:
• Liquid oxygen at atmospheric pressure expands at a ratio of approximately 860:1 (at 0
psig) when vaporizing into a gas (Figure 1-5). This can occur very rapidly when
exposed to the heat in the atmosphere.
• Ensure that the specified pressure relief devices are present and functioning properly
in any device that will contain liquid oxygen. This includes transfer hose assemblies.
Figure 1-5: Liquid Oxygen Expansion Ratio
1.3.3 Fire Safety
WARNING
Concentrated Oxygen. Increased risk of fire.
• Do not smoke or keep burning tobacco near this equipment.
Death or injury may occur.
• Keep flammable materials away from this equipment. Oils,
grease, including facial creams and petroleum jelly, asphalt, and
synthetic fibers ignite easily and burn rapidly in the presence of concen-
trated oxygen. If needed, use only specified oxygen compatible
lubricants as directed.
• Keep oxygen equipment away from open flames. Keep Reser-
voir and Portable units at least five feet away from equipment such as
furnaces, water heaters, and stoves that may contain open flames.
LOX
GA S
1860

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HELiOS Liquid Oxygen System Technical Manual
Figure 1-6: Combustion Triangle
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WARNING
Concentrated Oxygen. Increased risk of fire.
• Keep oxygen equipment away from electrical appliances. Keep
Reservoir and Portable units at least five feet from electrical appliances
that may cause heat or sparks.
• Keep oxygen equipment in a well-ventilated area at all times.
These units periodically release small amounts of oxygen gas that
must be ventilated to prevent buildup. Do not store liquid oxygen
equipment in a car trunk, closet, or other confined area. Do not place
bags, blankets, draperies, or other fabrics over the equipment when it
contains liquid oxygen.
• Do not place the Portable unit under clothing. These units normally
vent oxygen. Placing a Portable unit under clothing may saturate fabrics
with oxygen and cause them to burn rapidly if exposed to sparks or
flame. It may take several hours for oxygen levels in the fabric to return
to normal.
Important Facts:
The possibility of fire exists when the combination of a fuel, source of ignition, and oxygen
is present (Figure 1-6). High concentrations of oxygen (air is approximately 21% oxygen)
greatly enhance the possibility of combustion.
• Obtain all replacement parts for medical oxygen equipment from the manufacturer.
• Before servicing, clean all tools that come into contact with the oxygen system.
• Use only recommended oxygen compatible cleaning and leak detection products.
• Keep the Reservoir upright at all times. Secure liquid oxygen equipment when transport-
ing to prevent accidental tipover and spillage.
• If a liquid oxygen spill occurs indoors, open doors and windows to ventilate the area.
Avoid sources of ignition and do not walk on or roll equipment over the affected area.
• Any clothing or porous material that is splashed with liquid oxygen or otherwise absorbs
high concentrations of oxygen should be removed and aired for at least one hour away
from any source of ignition.

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HELiOS Liquid Oxygen System Technical Manual
Oxygen, in its normal state, is a colorless, tasteless, and odorless gas that is non-flam-
mable, although it greatly accelerates combustion in high concentrations. It constitutes
about 21% of the Earth’s atmosphere by volume. Oxygen in higher concentrations is
medically beneficial to patients suffering from certain respiratory diseases.
Oxygen, like most gases, will condense into a liquid with an increase in pressure or
decrease in temperature. As a liquid, oxygen is pale blue in color and is about 860 times as
dense as its gaseous form. At atmospheric pressure (14.7 psia), oxygen condenses into its
liquid form at a temperature of about -297°F (-184°C). Liquid oxygen (LOX) is an efficient
form of oxygen to meet a patient’s portable, ambulatory oxygen needs. A volume of liquid
oxygen, when vaporized, yields about 860 volumes of gaseous oxygen (Figure 1-5). As
you can see, a relatively small volume of liquid oxygen provides a much larger volume of
gaseous oxygen for a patient to use.
In medical liquid oxygen systems, liquid oxygen, and the gaseous oxygen resulting from
its vaporization or boiling, is stored under pressure. The elevated pressure, typically 22
psig (152 kPa), enables oxygen to flow to the patient at a selected, prescribed rate. To
sustain this oxygen flow to the patient, the liquid oxygen must be in a state that allows
vaporization to readily occur. In other words, the liquid oxygen must be in a state of
saturation. Let’s take a look at what liquid saturation is all about.
A saturated liquid is one that absorbs the maximum amount of heat possible at a given
pressure without vaporizing into a gas. If additional heat is added, the saturated liquid
begins to vaporize (boil) while remaining at a constant temperature until all of the liquid is
vaporized. A common example of a saturated liquid is water at its boiling point of 212°F
(100°C) at sea level. The constant addition of heat to the boiling water does not cause it to
become hotter, but instead causes part of the liquid water to turn to water vapor
(Figure 1-7).
Figure 1-7: Saturated (Boiling) Water at Sea Level
The saturation (boiling) point of a liquid depends not only on temperature but also on
pressure. If the pressure in a container of saturated liquid increases, the temperature
required for saturation to occur will also increase. This leaves the liquid unsaturated, that
is, capable of accepting more heat before it will boil (Figure 1-8).
1.4 LIQUID OXYGEN SATURATION PRINCIPLES

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HELiOS Liquid Oxygen System Technical Manual
Figure 1-8: Saturated (Boiling) Water at Higher Pressure
If the pressure in a container of saturated liquid decreases, the temperature required for
saturation to occur will decrease. This leaves the liquid “super saturated” or too warm.
When this occurs, rapid boiling and vaporizing of some of the liquid occurs. The rapid
boiling and evaporation of the liquid dissipates the excessive heat until the remaining
liquid cools down to the new saturation temperature associated with the decreased
pressure (Figure 1-9).
Figure 1-9: Saturated (Boiling) Water at Lower Pressure
Oxygen, which is normally a gas at atmospheric pressure, changes into liquid form when it
is cooled to about -297°F (-183°C) at atmospheric pressure. It is saturated at this tempera-
ture (and pressure) which means it will remain a liquid as long as no additional heat is
added. However, the large quantity of heat present in the atmosphere constantly enters
the liquid oxygen and causes it to boil and vaporize back into a gas. Since it is virtually
impossible to keep all of the heat in the atmosphere from entering the liquid oxygen,
constant boiling and vaporization occurs.
Now when liquid oxygen is placed in a closed container, the vaporizing gas is trapped and
begins to build pressure. As pressure increases above atmospheric pressure, more heat is
needed for boiling to occur at the higher pressure. The heat that is constantly available
from the atmosphere warms the liquid to a higher temperature where boiling again occurs.
The vaporizing gas builds pressure and the process continues. As the pressure on liquid
oxygen builds, the related saturation temperature of the liquid increases proportionally
(Figure 1-10).

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HELiOS Liquid Oxygen System Technical Manual
Figure 1-10: Liquid Oxygen Saturation Curve
It is important to maintain liquid oxygen saturation (boiling) at the specified operating
pressure of the HELiOS system. As an oxygen flow demand is put on the system, a slight
decrease in pressure occurs due to oxygen withdrawal. The saturated liquid oxygen in the
system vaporizes enough gaseous oxygen to maintain system operating pressure. This
ensures proper oxygen flow to the patient. If the liquid oxygen saturation temperature is
too low, the corresponding lower saturation pressure causes low oxygen flows to the
patient.
The HELiOS liquid oxygen system uses aluminum tubing compression fittings, tapered
pipe thread (NPT) fittings, and flexible tube barbed fittings. Proper make-up and service of
these pressure fittings is essential to leak-free operation.
1.5.1 Compression Fitting Makeup
The compression fittings used in the HELiOS system consist of a fitting body, tube,
ferrule, and nut (Figure 1-11). These fittings typically connect the aluminum tubing to
other components in the system. In a properly made-up compression fitting, sealing
occurs at two points: between the ferrule and the fitting body; and between the ferrule
and the tube.
Figure 1-11: Compression Fitting
1.5 PRESSURE FITTINGS AND CONNECTIONS

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HELiOS Liquid Oxygen System Technical Manual
Perform the following steps to make up a new compression fitting:
1. Inspect the tube end. The tube end should be cut square and the outside surface of
the tube should be free of scratches or other marks at least one inch (25 mm) back
from the tube end. Lightly buff the tube end with Scotch-Brite or fine emery paper to
remove any surface marks.
2. Insert the tube and make sure it is aligned squarely in the fitting body.
3. Make sure the tube end is bottomed against the tube stop in the fitting body. This is
necessary to prevent movement of the tube while the nut forces the ferrule to grip the
tube and create a seal.
4. Never permit the fitting body to rotate during make-up; use two wrenches. Always
hold the fitting body with a wrench while tightening the tube nut.
5. Always turn the tube nut the prescribed amount. With the tube against the tube stop
in the fitting body, tighten the tube nut finger-tight (Figure 1-12). For ¼-in. diameter
tubing, tighten the nut an additional 1¼ turns from finger-tight with a wrench. For
1/8-in. diameter tubing, tighten the nut an additional ¾ turn from finger-tight with a
wrench.
Figure 1-12: Compression Fitting Makeup
1.5.2 Compression Fitting Remake
When disassembling a compression fitting, mark the tube nut and the fitting body before
disassembly. To remake the connection, tighten the tube nut until the marks realign. A
slight torque increase indicates the ferrule is being re-sprung into sealing position. After
several remakes, it may become necessary to advance the tube nut slightly past the
original position. This advance need only be 15° to 20° (¼ to 1/3 of a hex flat). In situa-
tions where the existing tube with seated ferrule is to be used with a replacement fitting
body, tighten the tube nut until a slight torque increase indicates the ferrule is being re-
sprung into sealing position. Advance the nut an additional 15° to 20°.
1.5.3 Compression Fitting Troubleshooting
Most leaks in compression fittings are the result of improper connections. Typically the
tube is either not aligned squarely in the fitting body before connection or the tube is not
secured against the stop during connection. In addition, overtightening may also result in
a cracked fitting body that will leak.
To check for leaks, pressurize the system and use an oxygen-compatible leak detector
(such as SNOOP) on the fitting. If bubbles form at the back of the nut between the nut and
the tube, you probably did not get a seal between the ferrule and the tube; misalignment
may be the cause. However, check the tube itself for a scratch or seam running along the
tube, allowing a leak to occur.
1/4-in. Tubing 1/8-in. Tubing
3/4turn from
finger-tight
11/4turn from
finger-tight