Liberty systems Ccr liberty User manual

MANUAL

Liberty

LIBERTY USER MANUAL

Date of issue: 14 March 2019; rev. 2.11

CU HW rev.1.4, HS HW rev. 3.0, FW 2.11

Authors: Adam Procháska, Jakub Šimánek, Aleš Procháska

Published by Liberty systems s.r.o., CCRLiberty.com

LIBERTY MANUAL

Content

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Use of this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Responsibility of the CCR Liberty user . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

System of documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

User support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Depth limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Water temperature limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

CO2scrubber duration limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1. Technical design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.1 Basic schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.2 Dive/surface valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.2.1 Inhalation valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.2.2 Exhalation valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.2.3 Mouthpiece . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.2.4 Usage with a full face mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.3 Corrugated hoses and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.3.1 Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.3.2 Attachment to the head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.3.3 Connection to the breathing bags . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.3.4 Attachment of the DSV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1.4 Inhalation bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1.4.1 Automatic diluent valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1.4.2 Manual diluent bypass valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1.5 Exhalation bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1.5.1 Manual oxygen bypass valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1.5.2 Overpressure valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1.6 Oxygen tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1.6.1 Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1.6.2 Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1.6.3 Reduction valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1.6.4 Pressure reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1.7 Diluent tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1.7.1 Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1.7.2 Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

1.7.3 Reduction valve and pressure reading . . . . . . . . . . . . . . . . . . . . . . . 20

1.7.4 Backup regulator (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

1.8 CO2scrubber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

1.9 Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1.9.1 Control units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1.9.2 Direct measurement of ppO2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1.9.3 Measurement of He content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

1.9.4 Pressure and depth measurement . . . . . . . . . . . . . . . . . . . . . . . . . 24

1.9.5 Temperature measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

1.9.6 Solenoids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

1.9.7 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

1.10 Visual display units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

1.10.1 Handsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

1.10.2 Head-up display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

1.10.3 Buddy display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

1.11 Backplate and mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

1.12 Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

1.13 Buoyancy compensator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

1.14 Ballast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

1.15 Weights of individual parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2. Control-unit operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2.1 Control elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2.1.1 Meanings of inputs in surface modes . . . . . . . . . . . . . . . . . . . . . . . 31

2.1.2 Meanings of inputs in dive modes . . . . . . . . . . . . . . . . . . . . . . . . . 32

2.1.3 Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.2 Switching on the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.2.1 Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.3 Surface mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.3.1 Entering surface mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.3.2 Surface mode primary screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.3.3 Surface mode O2sensors screen . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2.3.4 Switching to other modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2.3.5 ppO2control in surface mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.4 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.4.1 Editor use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

2.4.2 Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

2.4.3 Mixtures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.4.4 Decompression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

2.4.5 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

2.4.6 Preferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

2.4.7 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

2.4.8 Faulty sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

2.4.9 Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

2.5 Dive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

2.5.1 Detailed screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

2.5.2 Synoptic screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2.5.3 Big Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2.5.4 Dive profile screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

2.5.5 Sensors screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

2.5.6 TTS Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

2.6 CCR mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

2.6.1 Entering CCR mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

2.6.2 Switching to other modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

2.6.3 ppO2regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

2.6.4 Decompression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

2.6.5 Specific handset control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

2.7 Manual CCR mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

2.7.1 Entering manual CCR mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

2.7.2 Switching to other modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

2.7.3 ppO2regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

2.7.4 Decompression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

2.8 Bailout OC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

2.8.1 Entering bailout OC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

2.8.2 Switching to other modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

2.8.3 Mixture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

2.8.4 Decompression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

2.8.5 Specific handset control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

2.9 Ascent plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

2.10 Setup in Dive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

2.11 Games . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

2.11.1 Sokoban . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

2.11.2 Snake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

3. Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

3.1 Dive plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

3.1.1 Planner settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

3.1.2 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

3.2 Dive preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

3.2.1 Replacement of CO2sorbent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

3.2.2 Assembling the rebreather body . . . . . . . . . . . . . . . . . . . . . . . . . . 70

3.2.3 Mounting the rebreather body . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

3.2.4 Attaching the counterlungs and hoses . . . . . . . . . . . . . . . . . . . . . . 71

3.2.5 Tank filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

3.2.6 Battery charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

3.2.7 Helium sensor calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

3.2.8 Calibration of the oxygen sensors . . . . . . . . . . . . . . . . . . . . . . . . . 75

3.2.9 Preparing the bailout apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . 76

3.2.10 Setting parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

3.2.11 Directional valve check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

3.2.12 Physical inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

3.3 Pre-dive inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

3.3.1 Internal testing of the control units . . . . . . . . . . . . . . . . . . . . . . . . 78

3.3.2 Pressure sensor test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

3.3.3 Comparison of oxygen sensors and their calibration . . . . . . . . . . . . . . 79

3.3.4 Helium-sensor test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

3.3.5 Battery testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

3.3.6 Solenoid testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

3.3.7 HUD inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

3.3.8 BD inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

3.3.9 Negative pressure test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

3.3.10 Positive pressure test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

3.3.11 Predive checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

3.3.12 Prebreathe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

3.4 Diving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

3.4.1 Breathing high oxygen content gases . . . . . . . . . . . . . . . . . . . . . . . 85

3.4.2 Putting on the apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

3.4.3 Using the DSV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

3.4.4 Monitoring of devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

3.4.5 Switching to CCR mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

3.4.6 Water entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

3.4.7 Submersion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3.4.8 In-water check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3.4.9 Descent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3.4.10 Controlling buoyancy and trim . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

3.4.11 Mask clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

3.4.12 Increased physical exertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

3.4.13 Ascent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

3.5 Post-dive procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

3.5.1 Immediately after surfacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

3.5.2 CO2scrubber maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

3.5.3 Cleaning and disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

3.5.4 Battery care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

3.5.5 Dive log download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

3.5.6 Long-term storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

3.6 Emergency procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

3.6.1 Emergency ascent (bailout) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

3.6.2 Oxygen-source malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

3.6.3 Diluent-source malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

3.6.4 Scrubber malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

3.6.5 Inadvertent release of the mouthpiece . . . . . . . . . . . . . . . . . . . . . 100

3.6.6 Flooding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

3.6.7 Loss of buoyancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

3.6.8 Rescue on the surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

3.6.9 Malfunction of oxygen-concentration measuring . . . . . . . . . . . . . . . 102

3.7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

3.7.1 Tools and replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

3.7.2 Detection of leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

3.7.3 Regular service inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

3.7.4 Long-term maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

3.7.5 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

3.8 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

3.8.1 By car . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

3.8.2 By boat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

3.8.3 By plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Introduction

Use of this manual

This user manual is part of the CCR Liberty documentation.

The CCR Liberty is intended to be used exclusively by a trained person who is capable of fully

understanding the instructions contained in this manual or is in the process of training with

the CCR Liberty in a course accredited by the manufacturer. The initial requirements of such

a training course include qualification for diving with trimix recognized by a training agency

and sufficient experience with technical diving.

Responsibility of the CCR Liberty user

Strong emphasis was placed on reliability during the development of the CCR Liberty. Individual

internal parts are separated in order to minimize the impact that failure of any given part

may have on the rebreather’s basic functionality. A number of systems have multiple backups.

The logic of the CCR Liberty’s control never prohibits the start of a dive even in the event that

malfunctions are detected; it only indicates the status if able to do so in light of the damage.

When cave diving, the inability to submerge can mean not being able to return from a dive;

therefore, the CCR Liberty does not impede submersion.

The user must always decide responsibly whether he/she switches to a backup apparatus or

even starts a dive with a partially malfunctioning rebreather.

A CCR Liberty user must accept the fact that diving involves risk. Following everything that

the user has learned in the CCR Liberty’s technical documentation and in training on diving

with this rebreather can reduce the risk but cannot eliminate it. Safety when diving is further

improved by regular training, methodical education and following good diving practices. Diving

with a rebreather requires a far higher degree of carefulness and discipline than diving with an

open-circuit apparatus.

If you do not accept the risk and you are not a trained, careful and disciplined diver, do not dive

with the CCR Liberty.

The manufacturer does not bear any responsibility for use of the CCR Liberty if the apparatus

has been modified in any way that is not stated in this manual or in the technical guidelines

issued by the manufacturer.

System of documentation

Version

The technical documentation is subjected to a process of continual development and

improvement. Therefore, please regularly check the website at www.CCRLiberty.com for

updates.

This manual provides operating instructions for the hardware and software (firmware) version

of the CCR Liberty written on the tittle page.

Technical guidelines

The manufacturer can issue technical guidelines. It is strongly recommended that the user

regularly checks www.CCRLiberty.com for new guidelines. Registered users will receive

notifications by e-mail.

Update of printed documentation

The electronic form of the manual is always available in its complete, updated form.

The electronic and printed forms of the manual may not be completely identical. In case of

insignificant changes (correction of minor typing errors, for example), only the electronic

version is updated.

User support

Registered users are entitled to technical support. The extent of free support can be limited.

The technical support department at Liberty systems s.r.o. will provide limited support for

potential and unregistered users. Prior to submitting a question, please familiarize yourself

with the general principles of rebreather diving with trimix and the freely available CCR Liberty

technical documentation.

Technical data

Depth limits

The maximum depth for which The CCR Liberty meets the requirements of the Harmonized

Standard EN 14143:2013 is 100 m.

Diluent Max. depth

Air 40 m

tmx 21/35 66 m

tmx 18/45 78 m

tmx (heliox) 10/90 > 78 m

Additional limitation of depth depends on the used diluent, see 72 Tank filling – Diluent.

The CCR Liberty currently is configured with Apeks Environmentally sealed DST4 1st stages,

the Maximum Operational Depth of the unit with this 1st stage configuration is 170 m. Beyond

170 meters the gas reduction valves ie. 1st stage regulators MUST be replaced with the Apeks

UST4 Environmentally unsealed 1st stage kit.

All components are tested in overpressure 6 MPa (depth 600 m). The depth gauge is checked

and calibrated in overpressure 3.5 MPa (depth 350 m). EC Type-examination was performed to

a 100 m simulated depth.

Water temperature limits

The CCR Liberty is intended for use in water temperatures above 4 °C and below 34 °C

according to the requirements of EN 14143:2013 (Article 5.1).

The minimal temperature is determined through CO2scrubber duration tests, which are done

at 4 °C.

CO2scrubber duration limit

The maximum safe operating period of the sorbent is 168 min, determined by a test in

accordance to EN 14143:2013 (Article 6.6.2). During the test 1.6 l/min of CO2were added to the

Date of issue: 29. June 2018

CU HW rev. 1.4, HS HW rev. 3.0, FW 2.11

Authors: Adam Procháska, Jakub Šimánek, Aleš Procháska

Published by Liberty systems s.r.o., CCRLiberty.com

breathing loop with ventilation of 40 l/min in water with temperature 4 °C, exhaled gas with

temperature 32±4 °C, 40 m depth and limit at ppCO25 mBar.

The sorbent’s actual maximum operating period can differ depending on the sorbent,

temperature, depth and the diver’s physical effort.

In normal conditions scrubber duration is considered to range from 4 h in deep cold water with

moderate work to 6 hours for an easy dive. For details see 66 Sorbent service life.

Weight

The total weight of The CCR Liberty, readied for a dive, including fillings, is approx. 37 kg.

For details see 30 Weights of individual parts.

The recommended service intervals are at 1 year, 3 years and 5 years.

The servicing of the unit can only be performed by authorised service technician or technical

centre.

Not performing services at regular intervals may result in voiding your warranty.

1. Technical design

1.1 Basic schematic

OXYGEN

DILUENT

Exhalation

bag

Inhalation

bag

Watertrap

CO absorbent

ppO sensors

Solenoid

valves

Overpressure

valve

Manualoxygenvalve

ADV

Manualdiluentvalve

Pressure

&temperature

sensors

He%

sensors

Dive/surface

valve

Oxygen

reduction

valve

Diluent

reduction

valve

Controlunits

HUD

Buddy

display

Rechargeablebatteries

Displayunits

The principle of the rebreather consists in recycling the breathing mixture. Carbon dioxide

is removed from the exhaled mixture and is again prepared for the next inhalation after

replenishment with oxygen. The composition of the breathing mixture changes continuously.

1.2 Dive/surface valve

The breathing mixture is delivered to the

dive/surface valve (DSV) through the

corrugated hose from the left. When inhaling,

the mixture passes through the inhalation

valve to the mouthpiece and then into the

diver’s respiratory tract. When exhaling, it

passes through the exhalation valve into the

corrugated hose on the right.

The direction of the mixture’s flow is indicated

on the DSV.

1.2.1 Inhalation valve

The inhalation valve ensures that the

exhaled mixture cannot directly return to the

inhalation bag and is not repeatedly inhaled

by the diver without the removal of carbon

dioxide and the addition of oxygen.

The inhalation valve is situated within the

connection of the left corrugated hose.

A similar mushroom valve can be found in, for example, the exhalation valve of the second

stage of the regulator of an open-circuit apparatus.

This is one of the most critical parts of the rebreather. It is difficult to detect a malfunction in

this part during a dive, and such a malfunction can lead to loss of consciousness.

1.2.2 Exhalation valve

The exhalation valve directs the exhaled mixture via the corrugated hose to the exhalation bag.

It ensures that the diver does not directly re-inhale the exhaled mixture.

The exhalation valve is situated within the connection of the right corrugated hose.

Closing the dive/surface valve

If the diver is in the water and not using the

DSV, the DSV must be closed. Otherwise, the

circuit will be flooded with water.

Closing the DSV is done by using the gate

handle in the front part of the DSV. In the open

position, the handle is put up; in the closed

position, it is down.

1.2.3 Mouthpiece

Tightly sealed mouthpiece in the diver’s mouth prevents water from entering into the circuit.

The DSV and corrugated hoses function with greater force than the regulator of an open-circuit

apparatus. Therefore, an anatomically suitable shape of the rebreather’s mouthpiece and

proper clenching in the mouth are very important.

We do not recommend using a mouthpiece that can be shaped to the diver’s bite after heating.

This kind of mouthpiece restricts the movement of the lower jaw, which leads to unilateral

stress and will rapidly exhaust the mastication muscles.

1.2.4 Usage with a full face mask

Even though the mechanical dimensions would allow the connection of the DSV to a full face

mask, in a full face mask it is not possible to switch the mixture inlet from an open circuit with

an inlet from a rebreather. One of the reasons for this is the necessity of defogging the visor.

Consult with the manufacturer regarding possibilities of connecting the rebreather to a full

face mask. Use of such an apparatus will require procedures that deviate from this manual and

from standard procedures taught in a course accredited by the rebreather’s manufacturer.

1.3 Corrugated hoses and accessories

1.3.1 Hoses

The corrugated hoses are made of EPDM

rubber. Compatible chemical agents must

be used for cleaning and disinfection (see 92

Cleaning and disinfection).

The corrugated hoses can be damaged if

subjected to excessive stress. In particular, it

is necessary to avoid perforation, cutting and

excessive wear. Avoid long-term deformation

of the hose, for example when storing the unit.

Do not use the hoses as a handle.

The corrugated hoses are one of the least durable mechanical parts of the CCR Liberty. Pay

appropriate attention to protecting them.

1.3.2 Attachment to the head

Unlike almost all other bayonet connectors

on the CCR Liberty, the bayonet connector on

the exhalation side has three protrusions. This

prevents incorrect attachment of the hoses.

Elbow on the exhalation side (left) and

inhalation side (right).

1.3.3 Connection to the breathing bags

The T-pieces have standard bayonet connections. On the

exhalation side, the T-piece has a partition that directs any

water that has entered the DSV to the exhalation bag and

improves the blending of the

mixture with oxygen added using

the manual bypass valve.

1.3.4 Attachment of the DSV

Attachment to the corrugated hoses is done

with axial teeth that fit together and are

secured with a wire retaining ring.

The baskets of the mushroom valves are

inserted into the connector. When handling

the baskets, pay attention to their correct

orientation.

1.4 Inhalation bag

The inhalation bag is mounted on the left part of the harness (from the

diver’s perspective when wearing the CCR Liberty).

The external cover is made from a resilient textile, ensuring mechanical

protection. The internal bag is made from polyurethane. It is connected to

the breathing circuit with a T-piece via the upper bulkhead with a bayonet

connector.

The inhalation bag is affixed to the harness with two stainless-steel

buckles and with Velcro flaps. It can be easily removed for cleaning,

disinfection and other handling.

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