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CCR Liberty User Manual

1. The optimum trim of the diver is horizontal even for descending and ascending During the course on diving with the CCR Liberty you will find the optimum ballast position Do not use a weight belt When training to achieve the correct balance and trim while breathing continuously try to remain motionless and not change depth or body position for several tens of seconds A backup source of buoyancy is always needed when diving This can be a dry suit disposable ballast or for example a liftbag 3 3 11 Mask clearing When diving with a rebreather a significant portion of the mixture consumed during a dive can be lost when clearing the mask Therefore keep mask clearing to a minimum 3 3 12 Increased physical exertion The CCR Liberty adds oxygen to the breathing loop as needed Unlike with some mechanical rebreathers increased physical exertion does not lead to a reduction of the partial pressure of oxygen In the case of longer physical exertion check the pressure in the oxygen tank frequently Take increased physical exertion into account for your decompression planning 77 3 3 13 Ascent Under normal conditions i e when ascending at a rate of less than 15 m min witha setpoint at minimally 0 8 bar and a normal functioning apparatus a decline of the partial pressure of oxygen pOz below the limit value of 0 16 bar does not occur If inadvertent rapid ascent occurs in a small depth pay greater attention to the
2. 5 Solenoid F Buddy T X yanes display DO Display units E m Pressure amp temperature r sensors Lu uu O gt CO absorbent gt X o o ZN ZN ADV O X Oxygen ouent X lt Inhalati Dive surf reduction n ae ion in reduction valve ag valve Manual diluent valve Water trap Manual oxygen valve Overpressure valve 10 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 INN 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
3. Oxygen delivery does not function by means of either the solenoids or manual bypass valve In this case it is necessary to terminate the dive It is necessary to switch to the bailout breathing apparatus no later than when the partial pressure of oxygen in the circuit falls below 0 3 bar 3 5 3 Diluent source malfunction The following procedures assume unavailability of off board gas Part of these problems can be solved by connecting off board gas to the manual bypass valve Low pressure in the diluent tank In this case it is necessary to terminate the dive During the ascent the diluent in the circuit expands and thus replenishes its volume in the circuit If possible do not increase depth during your return 84 As long as the volume of diluent in the circuit is sufficient it is possible to breathe from the rebreather If it is not sufficient it is necessary to switch to the bailout breathing apparatus Bear in mind that in this case it is not possible to perform the standard procedure for high pO flushing out the loop adding diluent and that such a situation can be resolved only by immediately switching to the bailout breathing apparatus which you should therefore have in standby position ADV free flow Close the ADV by sliding the collar This causes a disruption of the diluent delivery via the ADV This malfunction does not pose an immediate threat to the user The dive can continue with manual addition of diluent t
4. See also 1 9 4 Measuring of pressure 55 2 8 9 Miscellaneous Set time Set time Date and time setting is done in the format YYYY MM DD JELE teti Uae Ue ele Eoia Factory defaults hh mm ss Horizontal calibration The accelerometers are used for control by tilting and tapping They have to be calibrated Place the handset on a level surface e g a table before starting calibration Factory defaults This resets all settings to the default values Following a reset make sure to change all necessary settings before a dive 56 2 9 Games Do not disable error messages and notifications if the games are played underwater Ensure to not accidentally reposition while playing during a dive Check the pressure gauges and rebreather state on the second handset on a regular basis Playing a game will reduce your attention Remember you want to dive safely not just achieve a higher level in the game The games were tested on children Nobody was hurt 2 9 1 Sokoban Sokoban is a type of transport puzzle in which the player a diving mask with snorkel pushes tanks or crates around in a warehouse trying to get them to storage locations red dots The game is played on a board of squares where each square is either a floor or a wall Some floor squares contain tanks and some floor squares are marked as storage locations The player is confined to the board and may move horizontally or verticall
5. ee 89 3 6 1 Tools and replacement parts ee 89 3 6 2 Detection of eaKS eee 90 3 6 3 Regular service inspection 90 3 6 4 Long term maintenance 90 3 6 5 Firmware update Bef TRANS POM acct tied t bas Tao BED BY Cait iv nani hia tiie Rivlin inn been 3 7 2 By boat 3 723 By planens ais 93 section 1 Technical design Exhalation elbow Inhalation elbow Oxygen tank Diluent tank Inhalation T piece Exhalation T piece Counterlung Counterlung inhalation bag exhalation bag Handset HS left Handset HS right BCD inflator Head up display Automatic diluent valve ADV Dive surface valve DSV j wing Manual oxygen valve BCD overpressure valve Overpressure valve p Manual diluent valve Oxygen pressure gauge j Diluent pressure gauge Inhalation elbow Exhalation elbow Buddy display HUD connector Left HS connector Right HS connector Diluent tank Oxygen tank Head Ballast Scrubber canister BCD wing Jettison strap Diluent valve Oxygen valve Diluent reduction valve Oxygen reduction valve 1 1 Basic schematic 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 HUD Pe uits Rechargeable batteries ses
6. Setting 0 means deactivation of this alarm 51 Notifications No deco end Gas switch reminder No deco end On Gas switch done End of the dive in zero time in the Depth Time gt terminology of the B hlmann decompression Stack time model i e notification that it will be necessary to reduce the ascent rate and or perform decompression stops Gas switch reminder Off Recommendation to switch to a different mix This is used only in bailout OC mode Gas switch done On Change of mixture in bailout OC mode or diluent has been executed Depth Notification that the set depth during the descent has been reached It is possible to set three separate depths within the range of 0 300 m 0 means deactivation of the notification Time Notification that the dive time has been reached It is possible to set three separate times within the range of 0 999 min 0 means deactivation of the notification Stack time 150 min Notification that the cumulative time in any close circuit dive mode has been reached range 0 360min 0 means deactivation of the notification To reset a timer go to the Predive menu 52 2 8 6 Display Indication Preferences Display gt Indication gt Timeouts Units f Editor navig Orientation Checklist He measuring Setting for left right hand Indirect p02 Salinity Screensaver The display becomes inactive after the set
7. 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 11 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 replace the mixture inlet from an open circuit with the inlet from a reb
8. reset to previous value Long press upper key reset to default value Press both keys exit without save Press lower key save and exit Permissible range is indicated by lt minimum default maximum gt value The display shows a brief description below 46 2 8 2 Setpoints Use descent SP Off Use descent SP This enables the use of the descent setpoint pp0 descent pp02 low See also 2 5 3 Descent setpoint pp02 high ppO2 Limiting Metabolic consump pO2 descent 0 4 bar Value of the descent setpoint range 0 2 1 0 bar See also 2 5 3 Descent setpoint pOz low 0 7 bar Value of the low setpoint range 0 4 1 3 bars See also 2 5 3 Setpoint pO2 high 1 3 bar Value of the high setpoint range 0 7 1 6 bars See also 2 5 3 Setpoint pOz limiting 90 The setpoint is limited to the percentage of ambient pressure range 60 96 Setting a percentage that is too low reduces the effectiveness of decompression in small depths Setting a percentage that is too high in small depths increases the intake of oxygen which makes it necessary to discharge the content of the breathing loop and makes balancing more difficult See also 2 5 3 Setpoint limitation Metabolic consump 0 7 I min Physiological consumption of oxygen falls in the range 0 5 1 5 l min The pO2 predictive regulation algorithm takes this value in the breathing loop into account Entry of an
9. same distribution package Procedure 1 Disconnect both handsets 2 Remove jumpers from the battery the CU and handset are powered via USB when updating 3 Connect a multipurpose USB connector to the handset connector on the head and then attach the handset to its upper connector Turn on the handset which will start in bootloader mode M Launch the DSLoader click on the Enable routing button leave the route path at 0 Connect the DSLoader click on the Connect DSLoader button On the disk choose the firmware that you want to load into the handset Load the firmware into the handset click on the Upload DSLoader button MO Repeat this process for the other handset 92 3 7 Transport 3 7 1 By car Transport the CCR Liberty in the case in which it was delivered Secure the case against unrestricted movement in the vehicle s cargo space The dustiness of the sorbent increases when transported in its loose state in the distribution canister It is better to transport sorbent in the scrubber cartridge 3 7 2 By boat On a dive boat it is usually possible to fasten the apparatus to a bench For securing the rebreather use a line of approximately 1 5 2 m with secure knots Tie the apparatus to a suitable structure Secure the ready to dive CCR Liberty by passing the line over the tanks and backplate with the scrubber canister pressed to the back of the bench If you need to prepare the CCR Liberty f
10. 50 kg Energy stored in batteries 4 16x107 kg 30 Section 2 Control unit operation 2 1 Control elements The control of all electronics in the CCR Liberty is performed via the handsets The following inputs and combinations are differentiated e Press upper key e Press lower key e Press both keys e Long press upper key e Long press lower key e Long press both keys e Coded key press press both keys then release one key and press it again then release both keys e Tilt the HS away from yourself e Tilt the HS toward yourself e Tilt the HS to the left e Tilt the HS to the right e Tap the display glass e Shine a light on the display Long press means pressing the key for more than 2 5 seconds The key press operation is terminated at the moment the key is released or when pressing both keys when the last key is released The upper lower keys and directions of tilting are determined by the configuration of the given HS depending on whether it is set up for the left or right hand HS tilting can be changed in the configuration to tapping on the HS from any of the four sides 2 1 1 Meanings of inputs in surface modes The keys and other inputs are assigned meanings in connection with the current navigation item in the menu At the same time however general rules which apply wherever possible are determined for their use Press upper key confirmation of the selected menu item Press lower key
11. If the sorbent capacity is sufficient with reserve for the next planned dive and it will not be necessary to disinfect the rebreather until the next dive it is possible to reinsert the scrubber cartridge into the canister and leave it in the rebreather You can leave the scrubber canister opened for a maximum of 12 hours if stored in a dry place Mount the head and close the breathing loop openings for longer storage 3 4 4 Battery care Prevent complete discharging of the batteries If possible charge the batteries after every diving day 3 4 5 Dive log download After disconnecting the handset and attaching a multipurpose USB connector to the handset connector on the head without the connected handset the CCR Liberty s dive record memory is accessible via the USB interface in mass storage mode This means that for the computer to which the USB cable is connected it appears as an ordinary flash drive with restriction to read only Records of individual dives are stored as separate files in the divelog folder The control unit CU features the possibility to insert a micro SD card Such card is installed by the manufacturer in CU and a separate dive log which is not dependent on the CU s memory is stored on it The card s capacity is sufficient for storing detailed logs throughout the apparatus s service life though the diver can delete logs from the card according to his her needs The card is generally accessed in the sa
12. Switching to bailout OC mode is possible from the menu 31 51 22 40 12 1 in CCR mode manual CCR mode or surface mode 53 3 9 2 7 2 Switching to other modes 9 3 TMX 18 40 In the menu it is possible to switch from bailout OC mode to CCR mode and manual CCR mode If the current depth is less than 1 5 m it is possible to switch to surface mode and standby mode 2 7 3 Mixture Mix It is assumed that the diver will not breathe from the Dive mode CCR A Manual CCR mCCR apparatus s breathing loop but will rather use a Show plan separate open circuit apparatus Automatic pOz Settings R regulation is deactivated in bailout mode the apparatus Games gt n functions only as a decompression computer 49 0 1 04 33 55 Up to eight preset breathing mixtures are available in this mode The user can select the currently utilized mixture from the menu or can successively select individual mixtures with a long press of the upper or lower key After switching to bailout OC mode the configured default mixture is set 2 7 4 Decompression The decompression algorithm takes the partial pressure values according to depth and the set mixture into account After switching to bailout OC mode the safety level is automatically set using the bailout gradient factors GFs It is possible to switch between the standard and bailout GF sets in the menu without affecting the mode in which the CCR Liberty is operating 2 7 5 Spec
13. a general rule for bailout GF low a higher GF value a lower additional increase of safety is set than for standard GF low Bailout GF high 0 95 Gradient factor for bailout at the end of decompression range 0 10 1 00 As a general rule for bailout GF high a higher GF value a lower additional increase of safety is set than for standard GF high Ascent rate Speed 1 10 m min Anticipated ascent rate at small depth in zone 1 range 1 20 m min The set rate is used for calculation of the ascent plan This value is displayed in m min or ft min as set Depth zone 1 10 m Zone 1 lies between the surface and the set depth range 0 300 m This value is displayed in m or ft as set 49 Speed 2 10 m min Anticipated ascent rate at medium depths in zone 2 range 1 20 m min Depth zone 2 80 m Zone 2 lies between Depth zone 1 and the set depth range 0 300 m Speed 3 10 m min Anticipated ascent rate at large depth in zone 3 range 1 20 m min Descent rate Warn under 10 m This threshold marks at which depth the alarm is activated to indicate exceeding of descent rate At smaller depths exceeding the descent rate is ignored This value is displayed in m or ft as set This alarm is disabled by factory default It can be enabled in Setup gt Alarms gt Alarm sources gt Rates gt Descent rate Max rate 20 m min Anticipated descent rate range 1 40 m min The set rate is
14. bailout OC mode or surface mode 2 6 2 Switching to other modes In the menu it is possible to switch from manual CCR mode to CCR mode and bailout OC mode If the current depth is less than 1 5 m it is possible to switch to surface mode and standby mode 2 6 3 pO2 regulation Manual CCR mode is based on CCR mode However automatic replenishment of oxygen is not available and pOz regulation is performed only manually Measuring and display of pOz decompression calculations and the display of all other data are operational It is assumed that the user adds oxygen manually using the manual bypass valve or by manipulating the oxygen tank valve if any solenoid is locked in the open state If the pOz falls below 0 3 bar then oxygen will be added to the breathing loop automatically for security reasons This is only possible if the solenoids are operational and an oxygen supply is available When manually adding oxygen to the breathing loop anticipate a delay between adding oxygen and the change in measured values This delay is due to the fact that oxygen is added to the exhalation bag and the mixture must pass through the scrubber before it reaches the sensors 2 6 4 Decompression The decompression algorithm takes measured pO2 values and inert gases according to the set diluent composition into account 44 2 7 Bailout OC mode This mode serves primarily for resolving emergency situations 2 7 1 Entering bailout OC mode
15. combined graphic symbol on the detailed screen is intended for rapid orientation It tells the diver what must be done The color of the warning symbols changes from yellow to red according to the degree of importance Permitted to ascend to the surface Permitted to ascend to the depth of the decompression stop or decompression ceiling The depth of the decompression ceiling or decompression stop has been reached do not change depth The depth of the safety stop has been reached do not change depth The ascent rate has been exceeded slow your ascent The current depth is less than the depth of the decompression ceiling descend KZ EN o cic TTS The time to surface TTS includes the complete decompression profile t Temperature Water temperature is measured inside the HS case After a water temperature change wait about 1 2 minutes until the temperature reading reaches a stable value The air temperature is affected by many factors and is only an indication 39 CNS The so called oxygen clock is a percentage of consumption of CNS toxicity limit Calculation is based on NOAA oxygen exposure limits See also 3 3 1 Breathing high oxygen content gases He This shows the fraction of helium in the breathing mixture The He faction display method depends on the setting in Setup gt Preferences Solenoid symbols In the lower left and right corners there are symbols indicating the state of the solenoids ac
16. cycle downward through the menu Press both keys exit the menu without performing any action Long press upper key page up Long press lower key page down Long press both keys return to main screen 32 Coded key press switch to maintenance mode this can be done only from the main screen Tilt HS away from yourself increase the entered digit by one or check flag Tilt HS toward yourself decrease the entered digit by one or uncheck flag Tilt HS to the left move the cursor to the left Tilt HS to the right move the cursor to the right Wherever possible menu editing screen helpful symbols relating to the keys are displayed A symbol can be either next to a key indicating the action executed during a short key press or between the keys indicating the action executed during a short press of both keys The symbol next to a key means scroll down one row in the menu Scrolling in the menu is cyclical so the first row appears again after the last row The scroll up function is not available due to two key control The symbol means return one level without executing any action The v symbol represents confirmation of the action or selection 2 1 2 Meanings of inputs in dive modes The meanings of inputs are the same as in surface modes Other possibilities are Long press upper key high setpoint Long press lower key low setpoint Tilting is expanded with movement in decompression games ent
17. dive parameters For a detailed description see 2 8 Setup 68 3 1 10 Directional valve check The purpose of this test is to detect possible leakage of the directional valves of the dive surface valve DSV This kind of leakage could seriously endanger the diver It is not possible to assemble the complete breathing loop in the wrong direction but the diver has to be sure that this part is not missing or leaking Procedure 1 Put the bayonet socket cover on both T pieces 2 Cover the left inhale elbow 3 Place the mouthpiece in your mouth open DSV and try to inhale Inhaling shouldn t be possible The left corrugated hose collapses Exhaling should be possible 4 Close the DSV and check for leakage the corrugated hose should stay collapsed 5 Open the DSV unplug the inhale elbow and cover the right exhale elbow with bayonet socket cover Inhale from the mouthpiece and try to exhale Inhaling should be possible Pull the exhalation elbow to extend the corrugated hose on the right side Check for leakage the corrugated hose stay extended If some leakage occurs change the directional valves or do not dive 3 1 11 Physical inspection Check to ensure that the CCR Liberty is complete correctly assembled and mechanically undamaged If the CCR Liberty is operated within an organization where someone other than the diver is responsible for the physical preparation of the apparatus we recommend the implement
18. flash green 4x green flash green 5X green flash green 6X green flash green 1 65 lt pO2 2 0 red blinking red blinking red pO gt 2 0 red blinking red blinking red blinking Dive mode alarm 4x red flash 4x red flash 4x red flash no change Standby slowly flashing slowly flashing Charging 1 red 2 red 3 red red A of AN a but red blinking red blinking Fully charged green green green green Charging failed red blinking red blinking red blinking red blinking Reading green orange green Bean USB Writing red orange red intensive No action orange Connected purple purple blinking purple Download firmware Downloading purple purple Color blind mode If you cannot distinguish blue and green LED lights check Color blind mode in Setup gt Preferences gt Indication Signals for 1 05 lt pOz lt 1 65 will be changed according the following table pOz in dive mode bar color blind 1 1 1x green flash 1x green flash 1 2 2x green flash 2x green flash 1 3 3x green flash 3x green flash 1 4 4x green flash 4x green flash 1 5 5x green flash 5x green flash 1 6 6x green flash 6x green flash T Indicated pOz value in the range 0 05 bar 25 1 11 Backplate and mounting The method of mounting the CCR Liberty o
19. gases The mixture in the CCR Liberty circuit usually contains oxygen at much higher partial pressure than the air we breathe on the surface Acute CNS oxygen poisoning Exposure to high oxygen partial pressure may under certain circumstances cause acute CNS oxygen poisoning This may cause the affected person to drown The so called oxygen clock is a percentage of consumption of CNS toxicity limit Limit the maximum partial pressure and total exposure so that acute oxygen toxicity cannot occur according to the following NOAA table NOAA oxygen exposure limits pOz Maximum Single Exposure Maximum per 24 hr bar minutes minutes 1 60 45 150 1 55 83 165 1 50 120 180 1 45 135 180 1 40 150 180 1 35 165 195 1 30 180 210 1 25 195 225 1 20 210 240 1 10 240 270 1 00 300 300 0 90 360 360 0 80 450 450 0 70 570 570 0 60 720 720 Chronic oxygen poisoning Long term exposure to oxygen partial pressure higher than 0 5 bar common when using the CCR Liberty leads to chronic also known as pulmonary oxygen poisoning At exposures common to amateur technical diving chronic toxicity symptoms are not significant For very long dives it is necessary to calculate with long term exposure limits and to limit the overall exposure 73 The main symptom of chronic toxicity is a temporary reduction in vital lung capacity Another symptom may be nearsightedness hyperoxic myop
20. indication on the HS display 4 Cease all movement with the rebreather in particular do not move the bags and corrugated hoses 5 Wait 60 seconds the countdown runs automatically on the display If the pressure indicator stops in the green field the test result is positive Final evaluation of the test and confirmation of the result are left at the user s discretion See also Chapter 3 6 2 Leak detection 3 2 4 Solenoid testing The left solenoid is opened cyclically three times and closed with an interval of two seconds and with 1 1 duty cycle The expected state of the solenoid is shown on the HS display The right solenoid is subsequently tested in the same manner The test repeats cyclically if the user does not confirm the result or if automatic termination of the PDI does not occur due to the user s inactivity 3 2 5 Battery testing Both batteries are stressed with an artificial load caused by an intentionally increased power consumption by the processors connected solenoids without using energy efficient control vibration motors and the maximum brightness of the HS display After completing the test status of both batteries and the estimated duration of the batteries in dive mode are shown The user then decides whether he she considers the batteries estimated duration to be sufficient for the planned dive 71 3 2 6 Helium sensor test Functionality of the He concentration sensors is performed Th
21. manually exclude a sensor from operation and manually return an excluded sensor to averaging The manual option has a higher priority than automatic detection of faulty sensors If all sensors are excluded the CCR Liberty automatically switches to the backup algorithm for calculation of the partial pressure of oxygen indirectly using measurement of the He content Circulation of the mixture in the breathing loop is necessary for the measurement accuracy If the user does not breathe from the rebreather the mixture in the vicinity of the oxygen sensors can have a different proportion of oxygen than the mixture in different parts of the breathing loop and the displayed data can thus be inaccurate A discrepancy can similarly occur in the event of rapid descent when a larger amount of diluent is added Therefore the diluent must be breathable See 3 1 4 Diluent 21 1 9 3 Measurement of He content The helium concentration is determined by the velocity of sound in the mixture The He concentration sensors are connected to the inhalation side A pressure drop caused by circulation of the mixture in the breathing loop allows the mixture to pass through the sensor If the user does not breathe from the rebreather this will not occur and sensor reading may be inaccurate If the utilized diluent contains He and its composition is known the He concentration measuring function can be used for reverse determination of the concentration of oxyge
22. 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 I min of CO2 were added to the 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 pCO2 5 mBar test provided by Life Support Test Facility LSTF 0916 This is the worst case scenario and it considers a very high level of body exertion Corresponding oxygen consumption is 1 78 l min Typical oxygen consumption for scuba diving is from 0 4 I min for a diver in rest using DPV Smith 2008 to 1 2 I min for moderate work In normal conditions scrubber duration can be considered to range from 4 h in deep cold water with moderate work to 6 hours for an easy dive O2 consumption CO2 production Scrubber l min l min duration hh mm Diver in rest lt 0 5 lt 0 5 gt 8 Easy dive experienced diver 0 8 0 7 6 Mild work 1 0 0 9 5 Moderate work 1 2 1 1 4 EN 14143 1 78 1 60 2 48 The physiological limit is not pCO2 5 mBar but ten times higher Knafelc 2000 A respiratory quotient 0 9 is too high a more realistic estimate is 0 8 0 85 Sorbent service life is longer or safety margin bigger than previously stated In the course of the sorbent s service life it is allowed to remove the scrubber cartridge maximum two times see 3 4 3 CO2 scrubber maintenance 59 Sorbe
23. of the rebreather body is passed The loop in the upper part is generally not used it is intended for additional securing if needed The internal pouches which contain the individual weights are inserted into the external pouches The upper flap of the external pouch is intended for inserting weights before a dive and removing them after For emergency jettisoning of ballast pull the red strap on the lower part of the pouch This will open the external pouch and will release the internal pouch containing the ballast For common removal of the ballast do not use the method for emergency jettisoning This could lead to excessive wear of the Velcro A diver in a dry suit typically needs 2x4 kg of ballast Proper ballast weight and distribution is a subject of the CCR Liberty diver course 29 1 15 Weights of individual parts The listed weights are merely an indication The weight of the parts for each particular apparatus may vary Backplate with the wing harness and hoses without counterlungs 10 68 kg Weight pockets without weights 0 43 kg Couterlungs incl all valves 1 86 kg Tank with valve empty 5 44 kg Corrugated hose complete 1 11 kg Scrubber body and cartridge without sorbent 3 76 kg Head incl handsets HUD and BD 4 59 kg Charger with cable 0 09 kg Supplied accessories and small parts without chargers 1 00 kg Peli Stormcase iM2975 10 30 kg Oxygen 3 at 200 bar 0 84 kg Diluent air 3 at 300 bar 0 91 kg Sofnolime 2
24. operating instructions for the hardware and software firmware version of the CCR Liberty written on the title 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 40m tmx 21 35 66 m tmx 18 45 78m tmx heliox 10 90 gt 78m Additional limitation of depth depends on the used diluent see 3 1 5 Tank filling Diluent All components are tested in overpr
25. support page at www CCRLiberty com install it on your PC and set it up according to the instructions provided on the support page Control unit FW update It is necessary to update each control units separately Check to ensure that the same version of the firmware is installed on both CUs 91 Procedure 1 Disconnect both handsets 2 Remove the jumpers from the battery the CU is powered via USB when updating 3 Connect a multipurpose USB connector to the handset connector on the head and then attach the handset to its upper connector Launch the DSLoader and connect it click on the Connect DSLoader button On the disk choose the firmware that you want to load into the CU Load the firmware into the CU click on the Upload DSLoader button Repeat this process for the other CU mY OY UY ae The DSLoader is designed so that it does not load wrong firmware into the CU The bootloader that performs updates on the CU side is separate from the updated firmware Therefore there is no risk of irreversible damage to the CU in the event of a power failure or disconnection of the USB connector during a FW upgrade In this case the CU will not be functional for diving However it suffices to reset the USB connection and repeat the FW upload Update handset FW It is necessary to update each handset separately Check to ensure that the same version of the firmware is installed in both HSs and both FWs CU and HS were published in the
26. time set in the dive termination timeout the dive time indicated will be the time from the first submersion including the surface time Depth The depth can be read in the units set in the setup m or ft Depth is calculated from measured hydrostatic pressure Fresh water default or seawater density can be set for the depth calculation units and salinity are set in Setup gt Preferences Setting fresh sea water doesn t affect decompression calculations Decompression is based on ambient pressure and is independent of the displayed depth No deco You can stay for the indicated time at the current depth breathing the current mixture current He content and current SP to avoid a decompression obligation Ceiling The depth of the decompression ceiling decreases continuously up to the surface The reading is not artificially stopped anywhere during the ascent Always stay below the depth of the ceiling even if the ceiling depth is very shallow Ascending above the ceiling generates a warning Further violation more than 1 m 3 ft leads to an additional alarm Both alarms are logged The decompression calculation will continue without a penalization The diver is responsible to decide how to minimize the probability of severe conseguences 38 Battery symbols i The battery is full A Bar height is proportional to the remaining battery capacity El Color is changed at less than half capacity Combined graphic symbol The
27. transport of sorbent Consider the possibility of purchasing sorbent at your destination Head For the purposes of air transport the batteries must be disconnected by removing or turning the battery jumpers Do not transport the CCR Liberty in standby mode 94 95 Certificate GB14 92281 Liberty systems s r o K Halt i 756 14 Praha 8 180 00 Czech Republic M s certified that the manufacturer s technical fle and the PPE product detalied on page 2 have been assesses and found to de in accordance with EC Directive 89 686 EEC EC Type examination This certificate is valid from 28 November 2014 Issue 1 Certified since 28 November 2014 Fe SGS United Kingdom Limited Notified Body 0120 Un 2028 Worte Parkway Weston super Mare 8522 BWA Untad Kingdom Leb OJA 5229171 44 01934 522137 ema syserodoertegs com waw spa com S68 EC03 1011 Ths certificate remains ta property of SGS United Kingdom Lid to whem must be retumed on request Page lof sos Certificate GB14 92282 The management system of Liberty systems s r o K Halt i 756 14 Praha 8 180 00 Czech Republic Nas teen assessed and certified as meeting he requrerents of Directive 89 686 EEC Article 118 For the toflowing actes Manufacture of self contained re breathing diving apparatus Note All products marked CE0120 must have a valid EC Type Examination Certificate issued under Article 10 This certificate is valid fro
28. upon reaching the value of the low setpoint or upon completing or significantly slowing the descent but no later than after ten minutes When using the descent setpoint the user must continuously check whether he she has reached or exceeded the maximum physiologically permissible pO2 limit and adjust the rate of descent accordingly or take other measures Setpoint limitation Besides the set value the setpoint limit is defined by the ambient pressure For example at a depth of 3 m where the hydrostatic pressure is 1 3 bars pOz can reach a maximum of 1 3 bars when using pure oxygen For practical reasons unattainability of a precisely 100 oxygen atmosphere in the breathing loop the setpoint is set at 90 of the ambient pressure by default This value can be reset within the range from 60 to 96 2 5 4 Decompression The decompression algorithm takes measured pO2 values and inert gases according to the set diluent composition into account During a dive the safety level can be set in the menu by switching the set of standard and bailout gradient factors GFs without affecting the mode in which the CCR Liberty is operating 2 5 5 Specific handset control Long press upper key high setpoint Long press lower key low setpoint 43 2 6 Manual CCR mode This mode serves primarily for resolving emergency situations 2 6 1 Entering manual CCR mode It is possible to switch to manual CCR mode from the menu in CCR mode
29. valve The overpressure valve OPV is mounted in the lower bulkhead of the exhalation bag and is equipped with a bayonet connector The required overpressure is regulated via rotation When set to minimal overpressure by turning counterclockwise the valve is opened only a mushroom valve ensures minimal overpressure A safety lock prevents the OPV from accidentally falling out Removal is similar to the Manual diluent bypass valve see a previous page 16 1 6 Oxygen tank 1 6 1 Tank The CCR Liberty uses a three liter steel tank with 100 mm diameter and 200 bar filling pressure The original 300 bar filling pressure of the bare tank was changed according to valid technical standards The tank is labeled OXYGEN The tank is situated on the right from the diver s perspective when wearing the CCR Liberty For more information on filling see 3 1 4 Oxygen 1 6 2 Valve The valve has a M26x2 200 bar outlet connection 1 6 3 Reduction valve The CCR Liberty uses an Apeks DST4 first stage regulator with a specially made revolving low pressure component which is mounted on the backplate This serves as the lower tank mounting point in the middle part the tank is attached with a strap and Velcro The reduction valve is equipped with an intermediate pressure safety overpressure valve 1 6 4 Pressure reading The oxygen pressure gauge is situated on the right side the HP hose runs through an opening in th
30. Attach the counterlungs using the buckles so that the T piece bulkheads are roughly at shoulder level and the flaps with Velcro are facing the centre toward each other Connect the manual diluent bypass valve to the lower bulkhead of the left breathing bag Connect the overpressure valve to the lower bulkhead of the right breathing bag Connect the manual oxygen bypass valve to the middle bulkhead of the right breathing bag 63 10 11 12 13 14 15 16 17 18 19 Attach the inhalation T piece without the partition to the upper bulkhead of the left breathing bag Attach the exhalation T piece with the partition to the upper bulkhead of the right breathing bag Attach the terminal elbow of the inhalation left corrugated hose to the opening in the centre of the head Attach the terminal elbow of the exhalation right corrugated hose to the opening on the edge of the head Screw the short oxygen hose to the 9 16 elbow on the side of the head Tighten the union nut firmly by hand Route the LP hoses to the ADV and to the manual diluent bypass valve and the HP hose to the diluent pressure gauge so that they pass together over the shoulder strap from the outside to the inside of the strap Attach the ADV to the middle bulkhead of the left counterlung Attach the quick release connector of the LP hose to the manual diluent bypass valve Straighten the hoses and secure them under the Velcro flap of t
31. CCR Liberty USER MANUAL Published by Liberty systems s r o www CCRLiberty com Tom Sl dek Ale Prochaska Jakub im nek Date of issue 16 December 2015 CU HW rev 1 4 HS HW rev 3 0 FW 2 5 C Remove this page Obrazky CAD HUD v nov m provedeni HS Tilting podobn jako je v manu lu Freedomu Fotky ud lat Se zen postroje t i prsty pod popruhem Se zen postroje zav en palc do D krou k Dopsat 3 1 1 Sorbent replacement doplnit radi ln sklep n Introduction Use of this manual This user manual is part of the CCR Liberty documentation The CCR Liberty is intended for use 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 a 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 malf
32. COz scrubber from the cartridge and dispose of it safely 9 remove the scrubber canister from the backplate and remove the water trap Put the head with control units in a clean cool and dry place Prepare the antiseptic solution in a suitable vessel The vessel must be clean and free of all mechanical and chemical impurities For example a child s bathtub a mortar tub a new previously unused one or large Tupperware container is suitable for disinfection For ordinary disinfection use Mikrobac forte antiseptic in 0 5 concentration Follow the instructions when working with the antiseptic agent Rinse with clean fresh water and place the tube water trap corrugated hose assembly with open DSV breathing bags and CO filter in the tub Manipulate the corrugated hose assembly and the DSV to expel air so that the antiseptic solution fills the entire space this necessary skill is part of the CCR Liberty training course Completely fill the breathing bags with the antiseptic solution If you have noticed either visually or by smell mold growth it is necessary to perform thorough disinfection and to clean the surfaces also mechanically Most surfaces can be wiped with a rag soaked in the antiseptic solution use a bottle brush reserved specifically for this purpose to clean the inner surfaces of the corrugated hoses Leave the parts in the antiseptic solution for one hour Then remove them rinse with clean fresh water and allow to th
33. CR mode The standard method of switching to CCR mode is by selecting it in the menu from surface mode If submersion to a depth greater than 1 5 m occurs in surface mode or standby mode the rebreather will automatically switch to CCR mode Do not intentionally use this switching method it is intended only for emergency situations 2 5 2 Switching to other modes f f f Bailout mode 0C It is possible to switch from CCR mode to the manual Manual CCR mCCR Diluent CCR and bailout OC modes in the menu Show plan Settings If the current depth is less than 1 5 m it is possible to Games 51 8 1 29 28 03 The basic function of the CCR Liberty is to maintain correct partial pressure of oxygen switch to surface mode and standby mode 2 5 3 pOz regulation A predictive algorithm of pOz control is used Measured pOz is adjusted according to the mathematical model of the breathing loop The calculation of O2 delivery and possible subsequent opening of the solenoid is performed at six second intervals Oxygen is added alternately using the solenoids corresponding to both control units In the event that it is not possible to determine the actual depth due to a malfunction or manual exclusion of all pressure sensors regulation of oxygen delivery switches to a simple algorithm Setpoint The setpoint is a required pOz value for information on adjusting the setpoint see 2 8 2 Setpoints Two special values low setpo
34. ace on the strap ends Adjust the length of the crotch strap so that it passes closely to the body but does not bind Set the position of the rear D ring as low as possible but sufficiently high so that it does not place pressure on the buttocks when swimming The rear D ring should be within the diver s reach Test the exact position of the rear D ring in the water with the complete apparatus Do not shorten the straps after the first fitting Wait until you test your gear in the water You will be doing additional adjustments for 3 to 5 dives until the gear is fitted properly 27 1 13 Buoyancy compensator The CCR Liberty uses a wing type buoyancy compensator BCD with displacement of 200 N The compensator s design and materials are very durable and even suitable for cave and wreck diving The wing has a two ply design The internal bladder is made of high frequency welded Cordura 560 fabric with PU coating The wing s external cover is made of Cordura 2000 fabric The wing is attached with screws along the edge of the backplate In order to achieve the correct position of the inflator pass the LP hose through the rubber ring on the corrugated hose then through the rubber ring on the shoulder strap and finally through the second rubber ring on the corrugated hose Do not skip either of the rings on the corrugated hose upon disconnecting the quick release connector from the inflator it could recede so far that it would be d
35. al pressures determined by the setpoints At the end of its service life an oxygen sensor can successfully undergo calibration to 21 air but will no longer be capable of measuring pOz of 1 bar or higher See also 3 1 7 Calibration of oxygen sensors and 3 1 4 Oxygen Recommended 3 days Recalibration of the oxygen sensors will be recommended after a set number of days range 0 30 2 8 8 Faulty sensors Oxygen sensors Overview of sensor status with the possibility to exclude individual oxygen sensors for pO2 calculation Normal no sensor malfunction detected the sensor is used as a data source Uncalibrated sensor has not been calibrated Excluded sensor excluded automatically by the algorithm The algorithm can return the sensor to Normal status if it determines that the reason for exclusion has no longer exists Disabled sensor excluded manually Error sensor not present or bad contact Offline sensor not available digital communication at the module level is not functioning Pressure sensors Overview of pressure sensors with the possibility to manually exclude individual sensors Do not start a dive with more than one malfunctioning pressure sensor Normal no sensor malfunction detected the sensor is used as a data source Disabled sensor excluded manually Error sensor not present or bad contact Offline sensor not available digital communication at the module level is not functioning
36. also used for dive planning This value is displayed in m min or ft min as set Reset deco data This resets the saturation of biologically inert gases and the calculation of oxygen toxicity to a state that corresponds to a very long period after the previous dive A diver that uses the CCR Liberty after resetting the decompression data should not dive for 48 hours prior to submersion with the reset apparatus Do not dive for 24 hours with reset apparatus after a significantly increased altitude above sea level 50 2 8 5 Alarms Global alarms On This turns all alarms on or off for the entire CCR Liberty system Turning off all alarms is intended only for exceptional cases If you do not have any serious reason to deactivate the alarms leave them switched on If you switch off alarm signaling you must check all dive parameters very often and with great care Alarm sources Ceiling On Decompression ceiling has been exceeded CNS On Oxygen toxicity limit has been reached pOz Global alarms Alarm sources gt Notifications Ceiling CNS p02 Rates gt Low battery Partial pressure of oxygen has exceeded the allowed set range Rates Descent rate Off Descent rate has exceeded the set limit Ascent rate On Ascent rate has exceeded the set limit with a tolerance to very short fast movements Low battery 25 Battery power has dropped below the set limit range 0 40
37. ant flooding of the breathing circuit is very low After carefully assembling the apparatus and performing the prescribed pre dive procedures flooding can be ruled out unless there is a major disruption of the breathing loop s integrity due to mechanical damage In the event of significant flooding it is necessary to immediately switch to the bailout breathing apparatus and to use the compensator BCD to prevent loss of buoyancy Do not inhale if the mixture from the rebreather s DSV contains fluid In extreme cases this could contain a so called caustic cocktail i e a caustic mixture with dissolved lye from the sorbent A smaller amount of water can enter the circuit through the open DSV when the mouthpiece falls out of the diver s mouth In such a case water gets into the exhalation bag Though this does not represent an immediate danger it is advisable to expel water from the exhalation bag with the overpressure valve as soon as the opportunity arises Open the overpressure valve completely In order to avoid a significant change of buoyancy deflate the buoyancy compensator Add diluent to the circuit with the manual bypass valve Assume a position that brings the overpressure valve to the lowest point of the exhalation bag Expel the water from the bag by exhaling and pressing on the bag with your hand 35 7 Loss of buoyancy The compensator i e buoyancy control device or BCD is the basic tool for controlling buoyancy If the c
38. arison of pressure sensors 3 2 8 Comparison of oxygen sensors and their Calibration eiaei oma a 72 3 2 9 HUD inspection eee 72 3 2 10 BD inspection nnno 72 3 37 DIVING arinean ee atti 73 3 3 1 Breathing high oxygen content gases 73 3 3 2 Putting on the apparatus Using the DSV Monitoring of deviCES ennen 3 3 5 Switching to CCR mode een 75 3 3 6 Water entry eee eee 75 3 327 SUbMErS ON e siena gea 76 3 3 8 In Water CHECK o eneen 76 33 90 DESCE Is erosie ed ni e irige stan derd 76 3 3 10 Controlling buoyancy and trim 77 3 3 11 Mask clearing svenn sen versen adat o k k eenen 77 3 3 12 Increased physical exertion 77 3 3 13 Ascent 3 4 Post dive procedures nnn 79 3 4 1 Immediately after surfacing 79 3 4 2 Cleaning and disinfection 79 3 4 3 COzscrubber maintenance cee 81 3 4 4 Battery Caren nnen ne eee 81 3 4 5 Dive log download 81 3 4 6 Long term Storage ee 82 3 5 Emergency procedures 83 3 5 1 Emergency ascent bailout 83 3 5 2 Oxygen source malfunction 83 3 5 3 Diluent source malfunction 84 3 5 4 Scrubber malfunction lt 86 3 5 5 Inadvertent release of the mouthpiece 86 3 5 6 Flooding nena e n lane 3 5 7 Loss Of buoyanCy aanne ennen 3 5 8 Rescue on the surface 3 5 9 Malfunction of oxygen concentration measuring cea 88 3 6 Maintenance
39. at ensures proper system functioning Do not change the way it is made If you do try to take the harness out record or remember exactly how it is threaded through in order to prevent interference with the functioning of the whole system It is necessary to adjust the harness so that it fits properly Adjust the harness without the mounted scrubber canister head corrugated hoses and breathing bags Adjust the length of the shoulder straps so that it is possible to insert three fingers index middle and ring under the straps at the collar bone level without great resistance but not entirely freely The chest D rings should be as low as possible while still allowing you to cross your arms over your chest comfortably The D rings should be high enough for you to reach the left ring with your left thumb and the right ring with your right thumb The D ring on the left side of the waist strap should be roughly on your hip Adjust the length of the left part of the belt strap so that it passes through the eye of the crotch strap and there is a distance of approximately 5 cm strap width between the ring and the eye Adjust the right part so that the strap is slightly tight If you shorten a strap leave sufficient reserve for different suits and possible change of body dimensions After shortening it is necessary to deburr the ends of the straps by heat sealing them with a cigarette lighter or candle Do this carefully so as not to form a hard surf
40. ater 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 14 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 See also 3 4 2 Cleaning and disinfection 1 4 1 Automatic diluent valve The automatic diluent valve ADV is mounted in the middle bulkhead with a bayonet connector When the volume of the inhalation bag decreases the ADV is pressed The ADV then automatically adds diluent to the breathing circuit The ADV can be closed by sliding the collar The sensitivity of the ADV can be decreased w
41. ater trap is situated in the lower part of the canister The walls of the cartridges consist of external and internal metal mesh A lid presses down on the scrubber cartridge by means of springs attached to the pressure plate The pressure plate is fastened to the central tube with a retaining ring The scrubber cartridge capacity is approximately 2 5 kg of sorbent The sorbent volume is approximately 2 82 2 99 The service life and replacement of the sorbent are described in chapter 3 1 1 Replacement of CO2 sorbent DZ 19 7 p WIN SIG AM DB TIE LKT WYN SIN LEL CERN OOK SSN IEL IS SIS DAN SNN ASB SNK SNS SSB DODO O O0 WAS INS NS oe n 7770200 Po LL 1 9 Head The head is mounted on the COz scrubber canister When mounting the head push the scrubber canister pin into the opening on the head and close the head The head contains the control units solenoids oxygen helium and pressure sensors and batteries If it is difficult to remove the head place the rebreather on a hard surface as shown in the illustration Press down on the head and the scrubber canister with your hands 20 1 9 1 Control units The control units CUs are independent A display unit handset HS is connected to each CU which has its own power source solenoid temperature gauge and pressure O2 partial pressure and He con
42. atic activation it is also possible to switch on the CCR Liberty in the event of damage or loss of both handsets Using this option is risky and should thus be considered only for a rescue attempt for example for the evacuation of a diver from the siphon of a flooded cave Upon activation the rebreather switches to surface mode If submerged to a depth greater than 1 5 m the rebreather automatically switches to CCR mode 34 2 3 Surface mode 2 3 1 Entering surface mode The CCR Liberty switches to surface mode when switched on and activated by pressing the keys In the water surface mode can be selected in the menu if the depth is less than 1 5m 2 3 2 Surface mode primary screen 2015 07 30 08 44 4 days Date and Time Maintain correct local time setting It will be used for log recording 5050 Stack time 0 00 The scrubber stack timer runs continuously in dive mode except OC bailout regardless of depth even on the surface If you spend a long time in dive mode while not breathing from the rebreather s loop then increase the time for the stack time warning Don t forget to reset the timer when you refill the scrubber Predive gt Stack time reset Max altitude The maximum allowed altitude calculation is based on the ZHL decompression algorithm with an additional safety margin GF 0 80 No fly The calculation of the no fly time is based on the maximum allowed altitude according to the B hlmann decompr
43. ation of detailed organizational rules An assembly checklist in editable form is prepared for download on the CCRLiberty com website 69 3 2 Pre dive inspection The pre dive inspection PDI procedure can be started in surface mode Testing is conducted immediately before the dive after transport with a fully assembled rebreather with the control units switched on The user confirms the results of the individual inspection steps OK test result is positive FAIL partial test failure but the other steps of the PDI will be performed normally ABORT premature termination of the PDI It is also necessary to use the ABORT command when a reparable defect is detected and the full PDI must be carried out again The ABORT command is carried out automatically if the user does not respond to the prompt within two minutes The results of testing are recorded in the log The result of testing is displayed to the user the apparatus can cannot be used for diving but does not influence the subsequent behavior of the apparatus in particular it does not block the functions necessary for undertaking a dive in accordance with the Responsibility of the CCR Liberty User set forth in the introduction Ignoring the conclusions of the pre dive inspection is the diver s choice for which he she bears responsibility 3 2 1 Internal testing of the control units A test of communication between the control units and the peripheral devices i
44. centration sensors If one control unit fails the other control unit takes over automatically CUs and HSs are independent computers communicating via a bus Each handset displays the results of both CU s activities and is used to control both CUs Each HS is powered through the corresponding CU In the event of a malfunction of both handsets either CUs or the remaining functional CU will continue to regulate pO2 without change according to the last adjusted setpoint If communication between CUs breaks down each unit controls one solenoid The control algorithm is sufficiently robust to ensure that deviation of pO2 from the allowed limits will not occur during dual parallel regulation Connection to a personal computer The memory of operating protocols and content of the memory card can be read using a USB adapter connected to the handset connector as a mass storage device like a flash drive The connection to Windows Mac Linux Android and iOS was tested but there is no guarantee of compatibility with all operating systems and all computers During the time of USB connection the control unit is powered from the USB port and at the same time the battery is charged reduced current Each control unit is connected separately 1 9 2 Direct measurement of pOz Common R22D type electrochemical pOz sensors are used for measuring Two sensors are connected to each CU All sensors are located on the inhalation side The diver can
45. ched to the harness can be time consuming Sufficient buoyancy provided by CCR Liberty can aid the ongoing rescue procedure 3 5 9 Malfunction of oxygen concentration measuring If the chemical oxygen sensors are not functional in excluded disabled error or offline state see 2 8 8 Faulty sensors trimix is used as the diluent and the helium sensors are functional then the CCR Liberty automatically switches to indirectly determining the pOz using the measurement of the helium content See 1 9 3 Measurement of He content Consider this as an emergency procedure only Use it only when it is not possible to proceed according to 3 5 1 Emergency ascent bailout 88 3 6 Maintenance Maintenance operations including necessary technical information are described in the maintenance manual In the user manual only basic maintenance operations that every CCR Liberty user should master are described Warning There are no user serviceable parts or components inside the head other than oxygen sensor compartment where the sensors can be replaced The user may replace only a compartment inside a head as a whole Instructions for compartment replacement are included with new compartment and must be strictly followed Warning Do not remove any screw with 2 5 mm hex key from outside the head This may cause a CU s compartment leakage and will void the warranty Use only oxygen compatible lubricant for the maintenance of part
46. cording to data from the control units X solenoid in closed state solenoid in open state Setpnt The setpoint is a required pOz value for information on adjusting the setpoint see 2 8 2 Setpoints O2 sensors pOz as measured by four O2 sensors is displayed pOz The pO2 can be measured directly using O2 sensors or indirectly using He fraction sensors It shows the average value See 1 9 2 Direct measurement of pOz and 1 9 3 Measurement of He content 40 2 4 2 Synoptic screen 26 43 12 39 The depth value is easy to read It is accompanied by other important information The meaning of all values is identical to the detailed 5 1 u 0 screen 9 6 1 29 2 4 3 Big Screen The most important information is written in really big characters This screen is useful when visibility is very bad Many divers can read the numbers even without a mask 2 4 4 Dive profile screen Start The time of submersion is useful for checking compliance with the schedule Avg The average depth is indicated with the yellow horizontal line and with a number displayed in yellow Current depth See lower left corner Dive time Runtime of current dive is placed in lower right corner Max This is the maximum depth reached during the dive The field with this value is placed in the middle of the bottom line 41 2 5 CCR mode This is the primary dive mode with the CCR Liberty 2 5 1 Entering C
47. cure the handsets to your wrists Ensure that the HS s cables are wrapped around your arms 11 Ensure that the HUD is attached to dthe DSV and its cable is wrapped around the corrugated hose 12 Check the accessibility of the BCD inflator 3 3 3 Using the DSV The DSV must be closed at all times when it is not in your mouth Close it before taking it out of your mouth open it after putting it in your mouth and clear the DSV before inhaling 74 Always exhale into the mouthpiece before inhaling from the mouthpiece under water Opening the DSV when it is not in your mouth will cause an immediate loss of buoyancy and could possibly flood the breathing loop 3 3 4 Monitoring of devices Partial pressure of oxygen You must know the concentration of oxygen pOz in the breathing loop at all times Learn to use the HUD for continuous monitoring as it allows you to concentrate on other tasks Always know your poz Check the partial pressure of oxygen on the handset display at regular intervals as well If the values from various sensors differ check whether any of the sensors is coming to the end of its service life Pay extra attention to the pO2 reading when significantly changing depth Do not rely solely on the alarm indicating reduced partial pressure of oxygen Reduced partial pressure of oxygen is also signaled on the buddy display Familiarize your diving partners with the BD signals so that they will be able to recognize in
48. d for display only Editor navig Tilt The numbers in the editor can be increased or decreased by tilt or by tap To control with tapping it is necessary to practice a little Do not change the tilt setting unless you have a strong reason Checklist enabled When entering CCR mode from the surface mode menu a checklist is displayed This can be disabled He measuring TMX only TMX only He sensors are used only in case that the selected diluent contains helium Always He sensors are used in all cases Never He sensors are permanently deactivated Rev pO2 src Adaptive Adaptive Backup algorithm for calculating the partial pressure of oxygen indirectly using the proportion of He the diluent composition is adaptively adjusted Diluent For indirect calculation of the partial pressure of oxygen the diluent composition entered in the setting is used 2 8 7 Calibration Calibrate He Air The He sensors are calibrated with air The sensor is stable for a long period of time therefore perform calibration only after replacing the sensor or in case there are doubts about its accuracy Sensors must be free of any traces of helium 54 Oxygen purity 99 5 The oxygen concentration in the calibration gas can be set If possible use oxygen with a purity of at least 99 5 for calibration Do not use air for calibration The partial pressure of oxygen in air at atmospheric pressure differs significantly from the parti
49. d to have addressed all of the relevant requirements of the standard However the detailed content of the information notice is the responsibility of the manufacturer as are translations into other languages This certificate is issued on the strict condition that appropriate checks on manufactured PPE as detailed in Article 11 of the directive are implemented and maintained while the model is in production Certification is based on technical file reference CCR Liberty Technical file dated 8th September 2014 amp supplemental Documents SGS Reference Number GB PP 233262 Tris ceetiicate remains the property of SGS United Kingdom Lid to whem must bo returned on request Page 2042 96 CCR Liberty User Manual Author Tom Sl dek Ale Prochaska Jakub im nek Publisher Liberty systems s r o www CCRLiberty com Issue Revision 1 10 16 December 2015 Use of this manual approved by Lucie mejkalov CEO EC Type examination for Directive 89 686 EEC by Notified body No 0120 SGS United Kingdom Ltd Unit 202b Worle Parkway Weston super Mare BS22 6WA UK 97
50. ding diluent and that such a situation can be resolved only by immediately switching to the bailout breathing apparatus which you should therefore have in standby position 85 3 5 4 Scrubber malfunction If you need to breathe rapidly with excessive frequency that does not correspond to your level of exertion this is a possible cause of an increased concentration of carbon dioxide in the circuit due to a scrubber malfunction You may also be afflicted with nausea a headache and confusion On the contrary another possible cause of similar symptoms is psychosomatic hyperventilation and reduced content of carbon dioxide in the blood and other bodily tissues This usually occurs due to increased mental stress such as when the diver is confronted with task overload If the symptoms are severe immediately switch to the bailout breathing apparatus as there is a risk of loss of consciousness As soon as possible take several slow deep breaths from the backup apparatus Of course you should never allow such a situation to progress to the stage of severe symptoms If you experience discomfort when breathing but the symptoms are not so severe as to pose a risk of unconsciousness test the concentration of carbon dioxide in your blood Stay where you are without moving do not in any case change depth significantly Try to hold your breath for ten seconds If you are unable to hold your breath or you can do so only with great difficulty a
51. e Oxygen sensors When the oxygen sensors are calibrated their degree of wear is checked Of course sensors can suddenly reach the end of their service life even during a dive especially in an environment with high partial pressure of oxygen Therefore we recommend replacing the sensors no later than one year after putting them into operation or maximally 18 months after their date of manufacture It is not necessary to discard replaced sensors Even though a sensor s degree of wear prevents it from reliably measuring higher partial pressures of oxygen in the rebreather it will often suffice for reliable measuring of lower partial pressures of oxygen when preparing mixtures Hoses If any hose shows signs of excessive wear or if damage is detected during a bubble check see 3 3 8 In water check replace it If mechanical damage does not occur as a result of careless handling hoses should be replaced during a regular service inspection The service life of hoses is maximally five years from the date of putting them into operation and maximally seven years from the date of production Straps Harness straps are highly durable A strap that has been damaged on the edge should only be replaced in case that it was cut to more than one third of its width 90 Straps are generally replaced for aesthetic reasons You can order a replacement when ordering a regular service inspection 3 6 5 Firmware update The CCR Liberty s
52. e backplate 17 1 7 Diluent tank 1 7 1 Tank The CCR Liberty uses a three liter steel tank with 100 mm diameter and 230 bar filling pressure The original 300 bar filling pressure of the bare tank was changed because a 230 bar valve is used The tank is labeled DILUENT The tank is situated on the left from the diver s perspective when wearing the CCR Liberty For more information on filling see 3 1 4 Diluent 1 7 2 Valve The valve has a G 5 8 230 bar outlet connection 1 7 3 Reduction valve and pressure reading The design is similar to that of the oxygen tank only reversed 1 7 4 Backup regulator optional The second stage of a regulator may be connected to the output of the first stage of the diluent through LP hose of appropriate length This regulator can be used as a backup if the diluent at a given depth is breathable oxygen partial pressure between 0 16 and 1 6 bars Having the backup regulator connected to the diluent may be useful for sanity breaths and for prolonged switching to a backup apparatus However it is advised tu use the backup regulator only in special circumstances for example during extreme shallow dives 18 1 8 CO2 scrubber The CCR Liberty uses a radial scrubber The breathing mixture flows from the outside to the center of the scrubber cartridge The scrubber consists of a scrubber cartridge inserted into a scrubber canister external body of the CCR Liberty A w
53. e user is informed of the ongoing test on the HS display The test is automatic Confirmation by the user is required only in the event that the test result is negative 3 2 7 Comparison of pressure sensors The measured values of both pairs of pressure sensors are compared The user is informed of the ongoing test on the HS display 3 2 8 Comparison of oxygen sensors and their calibration The current values of the individual sensors are shown on the display in millivolts and the pO2 values are displayed in bars using to the most recent calibration Final evaluation of the test and confirmation of the result are left at the user s discretion 3 2 9 HUD inspection The diodes light up in blue red and green successively in three steps At the same time HS displays which colors should light up on the HUD The test repeats cyclically if the user does not confirm the result or if automatic termination of the PDI does not occur due to the user s inactivity 3 2 10 BD inspection The buddy display successively lights up in green at low medium and high intensity then in red at low medium and high intensity A symbol with the same color is at the same time displayed on the HS intensity is indicated by the size of the symbol The test repeats cyclically if the user does not confirm the result or if automatic termination of the PDI does not occur due to the user s inactivity 72 3 3 Diving 3 3 1 Breathing high oxygen content
54. ed In an emergency a mixture can enabled during a dive Furthermore a new mixture can be defined during a dive These possibilities are reserved for emergency situations only Def diluent A different default diluent can only be selected from mixtures that are enabled Def OC mix A different default OC bailout mixture can be selected only from mixtures that are enabled 48 2 8 4 Decompression GF low 0 30 GF low Gradient factor at the start of decompression GF high Bailout GF low range 0 05 1 00 Bailout GF high Ascent rate GF low determines an additional increase of safety at Descent rate Planner settings the depth of the decompression ceiling at the start of Reset deco data decompression Setting a value of 1 00 corresponds to the BUhImann decompression algorithm without additional increase of safety using the gradient factors method Setting low values leads to deeper and longer stops at the start of decompression GF high 0 80 Gradient factor at the end of decompression range 0 10 1 00 GF high determines an additional increase of safety when ascending to the surface Setting a value of 1 00 corresponds to the B hlmann decompression algorithm without additional increase of safety using the gradient factors method Setting low values leads to longer shallow decompression stops Bailout GF low 0 80 Gradient factor for bailout at the start of decompression range 0 05 1 00 As
55. electronics have two different types of firmware FW one for the control unit the other for the handset It is possible to download the current version of both firmwares in one package from the support page at www CCRLiberty com support Perform FW updates with respect to maintaining CE certification according to the description on the support page Perform updates with the head removed from the rebreather s body It is necessary to combine CU and handset FW updates First load the FW into the CU and then allow routing see below and load the FW into the handset Repeat for the other CU and handset Check to ensure that both FWs were published in the same distribution package After performing an update pay close attention to the correct functioning of the CCR Liberty especially when diving Do not perform an update immediately before an extreme dive If you update the FW before embarking on an expedition type event we recommend that you take with you a multipurpose USB connector a USB cable and a notebook with an installed and setup DSLoader and that you have an older version of the firmware available DSLoader It is possible to update the firmware from a PC with the Microsoft Windows 7 or higher operating system on which a DSLoader application is installed installation on Microsoft Windows XP is not supported though it is possible for the DSLoader version from May 2014 Download the DSLoader from the
56. em dry Do not dry the parts in direct sunlight When more intensive disinfection is required use a more highly concentrated solution maximum 2 or leave the parts in the antiseptic solution for a longer time maximum four hours Instead of Mikrobac it is possible to use a different antiseptic agent based on quaternary ammonium salts that is compatible with the materials from which the CCR Liberty is manufactured The CCR Liberty s manufacturer does not guarantee the compatibility of antiseptic agents other than Mikrobac forte In any case do not use chlorine based agents In normal circumstances the head ADV manual bypass valves and overpressure valve does not need to be disinfected In the event of increased requirements for disinfection the oxygen sensors can be removed from the head and the remaining parts disinfected by washing them with the antiseptic solution The ADV manual bypass valves and overpressure valve can be disinfected by submerging them in the antiseptic solution The antiseptic solution is highly toxic to aquatic organisms Dispose of it in an environmentally friendly manner 80 3 4 3 CO2 scrubber maintenance As a general rule it is necessary to dry out the water trap after every dive or at least at the end of the diving day Detach the head remove the scrubber cartridge remove the water trap and dry it with a paper towel With another paper towel also dry the exterior surface of the cartridge
57. en entering the water in this manner have the DSV in your mouth have it closed at the moment of entry Sudden entry into the water must be supervised by a person qualified to provide assistance in the event that problems arise Perform a bubble check after entering the water Due to the small volume of the oxygen and diluent tanks minor leaks in the high pressure and low pressure parts which are tolerable in open circuit diving can lead to a rapid decline of pressure in the tanks 3 3 7 Submersion For submersion use the compensator BCD to control buoyancy Choose the amount of ballast with respect to the possible change of weight during a dive Do not overload yourself in order to facilitate submersion Unlike in open circuit diving weight reduction due to consumption of gases is minimal The possible use of the open circuit bailout apparatus has a more significant impact on weight reduction Determination of the correct amount of ballast is one of the skills that you will learn in a course on diving with the CCR Liberty 3 3 8 In water check Verify the pOz control system and adjust buoyancy Perform a bubble check with your diving partner Scan all parts of the breathing loop in the direction of the gas flow Rotate horizontally using the helicopter turn 3 3 9 Descent During the descent the ADV adds diluent to the breathing loop you can also add diluent manually Diluent is added to the inhalation bag During a rapid desce
58. es at least once every six months If after storing the unit for more than a month you find that moisture persisted inside the apparatus or you can smell mustiness or mold from the corrugated hoses it is necessary to disinfect the apparatus again When storing the rebreather make sure that no rubber parts hoses cables are pinched or compressed Ensure that no other objects are leaned against the rebreather Secure the rebreather against falling 82 3 5 Emergency procedures Prevent the occurrence of emergency situations through high quality training Do not exceed the limits of your diving qualification Carefully adhere to the prescribed procedures before during and after every dive In the event that prior to a dive you discover a problem associated with the rebreather and you are not able to resolve it do not dive with the rebreather regardless of the severity of the problem 3 5 1 Emergency ascent bailout Whenever diving with the rebreather is necessary to wear a backup breathing apparatus A common type of backup device is a standard stage bottle If during a dive a malfunction occurs in the CCR Liberty that you are not able to resolve or precisely identify or if you even have a suspicion that something is wrong with the rebreather switch to the bailout breathing apparatus 1 put the bailout breathing apparatus in the standby position 2 exhale into the circuit and close the DSV but hold a sufficient amoun
59. ession algorithm ZHL The air pressure in the cabin of a commercial aircraft is maintained at a level corresponding to air pressure at 1800 2400 m 6000 8000 feet above sea level while cruising altitude falls in the range 11 000 12 200 m 36 000 40 000 feet The no fly time calculation uses the decisive altitude 4464 m 14 646 ft At this altitude compartments containing the oxygen masks will be opened automatically and the oxygen masks will drop down in front of the aircraft passengers 35 Battery symbol A graphical indication shows the remaining battery capacity Two batteries are indicated separately i The battery is full A Bar height is proportional to the remaining battery capacity a Color is changed at less than half capacity a Plugged to a charger Setpoints Descent if disabled low and high setpoints are listed pOz Measured partial pressure of oxygen is displayed 2 3 3 Surface mode O2 sensors screen Not only the pOz but also the voltage on the sensors can be read If the state of a sensor is not in operational mode not connected offline error excluded disabled uncalibrated the appropriate tag appears instead of the pOz value You can find also the local time the max sensor s reading difference and the stack time on the O2 sensors screen 2 3 4 Switching to other modes f Dive mode CCR In the menu the user can switch from surface mode to Manual CCR mCCR Bailout mode 0C
60. essure 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 CO2 scrubber duration tests which are done at 4 C CO2 scrubber 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 I min of CO2 were added to the 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 pCO2 5 mBar The sorbent s actual maximum operating period can differ depending on the sorbent temperature depth and the divers 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 3 1 1 Sorbent service life Weight The total weight of The CCR Liberty readied for a dive including fillings is approx 37 kg For details see 1 15 Weights of individual parts Contents Section 1 Technical design 8 1 1 Basic schematic 10 1 2 Dive surface valve nn 11 1 2 1 Inhalation Valve eee 11 1 2 2 Exhalation
61. he left breathing bag Route the LP hose to the manual oxygen bypass valve and the HP hose to the oxygen pressure gauge so that they pass together over the shoulder strap from the outside to the inside of the strap Attach the quick release connector of the LP hose to the manual oxygen bypass valve Straighten the hoses and secure them under the Velcro flap of the right breathing bag Route the LP hose of the buoyancy control device BCD under the first rubber band on the corrugated inflator hose of the BCD then under the rubber band on the left shoulder strap above the D ring and finally under the second rubber band on the corrugated inflator hose Connect the quick release connector to the inflator of the BCD Adjust the position of the BCD inflator hose so that it is easily accessible when diving For attaching devices to the connectors see also 1 3 3 Corrugated hoses Connection to the breathing bags 1 4 Inhalation bag and 1 5 Exhalation bag 3 1 5 Tank filling When filling the tanks with the breathing mixture follow the procedures and rules with which you were familiarized in the course on blending mixtures for technical diving within your training system trimix blender etc If you have not successfully completed such a course leave the blending of mixtures to a qualified person 64 When handling oxygen follow the procedures and rules with which you were familiarized in a course on diving with tri
62. ia Symptoms may persist for several months When pO 1 4 bar then the CNS toxicity limit is always shorter than the pulmonary toxicity limit For calculations related to chronic toxicity use the REPEX method that you know from the nitrox diving course The CCR Liberty does not perform calculations associated with chronic oxygen toxicity 3 3 2 Putting on the apparatus After the pre dive inspection set the CCR Liberty on its stand on a hard surface on the ground a bench or table or in a vehicle s cargo space Properly secure the rebreather so that it cannot fall for example by having a partner hold it Procedure 1 Flip the breathing bags and corrugated hoses with the DSV to the opposite side of the rebreather s body Position yourself under the shoulder straps Put on the shoulder straps ideally with both arms at the same time Stand up on both feet Due to the weight of the CCR Liberty avoid rotating your spine which could lead to injury When standing up from the ground carefully assume a kneeling position and then stand up 5 Take the crotch strap up between your lags and pass the belt buckle through the eye of the crotch strap Gently tighten the belt and fasten the belt buckle Flip the breathing bags and corrugated hoses with the DSV to the front Attach the breathing bags to the crotch strap V straps with the buckles oD NO Make sure that all of the straps are adequately tightened and are not twisted 10 Se
63. ifficult to find it The buoyancy compensator is not a life preserver It does not maintain the diver in a face up position It is not designed to hold the diver s face above the surface should he she become unconscious or immobile A marking on the backplate indicates that the BCD is suitable for use with two 3 litre cylinders amp rebreather Of course any number of neutrally buoyant bailout cylinders can be added to provide enough bailout gas supply It can be applied to any other piece of equipment with neutral buoyancy such as propulsion vehicles scooters large diving lights etc There are some options if bailout cylinders are not perfectly neutrally buoyant and you need a large quantity of backup gas First option typical for cave diving is not to carry all the gas in one moment Attach stage tanks with backup gas to the appropriate points on the cave line during a preparation dive Then make a push dive s Then collect unused backup gas during a cleanup dive Second option typical for deep wreck diving is making your backup tank s buoyancy perfectly neutral You can achieve this with a light regulator SPG and hoses attached to the stage tank typically aluminum S80 filled with helium rich gas mix 28 1 14 Ballast The ballast system is composed of two pouches placed on the sides of the scrubber canister and is attached to the tanks In the lower part of the pouches there is a loop through which the attachment strap
64. ific handset control Long press upper key change of mixture up according to the list cyclically Long press lower key change of mixture down according to the list cyclically 45 2 8 Setup The CCR Liberty is configured in surface mode Activate the surface mode main menu with a short press of both keys and select Setup Setup Some values can be set during a dive however this poe s i og Dook gt possibility is reserved for resolving exceptional and System check Analyzer emergency situations only Games The particular set values depend primarily on the user s experience physiology and personal preferences The fact that the CCR Liberty enables setting a certain value does not mean that such a setting is safe and suitable for you and for your planned dive If you are not sure which value to set leave the values on the default setting The manufacturer does not provide a warranty for faulty operation of the CCR Liberty if this faulty operation is the result of improper setup The factory default setting value is shown between square brackets in headlines of following text 2 8 1 Editor use The majority of variable values is edited in a similar manner Tilt toward yourself decrease the entered digit by one or uncheck flag 0 00 0 30 GF low Tilt to the left move the cursor to the left Tilt to the right move the cursor to the right Press upper key discard editing
65. ig 67 Procedure 1 Start O2 sensor calibration on HS in Predive gt Calibration Oz 2 Wait for mV stabilization this could take a while 3 Start calibration 4 Save Whether or not a sensor is already at the end of its service life is also determined during calibration At higher altitudes above sea level the partial pressure of oxygen in the calibration mixture decreases in proportion to lower atmospheric pressure The CCR Liberty measures atmospheric pressure and takes it into account during calibration Therefore do not perform any corrections at higher altitudes above sea level 3 1 8 Preparing the bailout apparatus The bailout apparatus must ensure a reliable return to the surface at any time during a dive The standard solution is to use a corresponding number of stage and decompression tanks with mixtures according to depth distances and the bailout plan For a deep diving backup it is recommended to use a mixture rich in He regardless of the financial costs The mixture will probably not be used for many dives A higher content of He results ina lower negative buoyancy which makes transporting the tank under water more convenient Preparation of the bailout stage tanks is similar to that of open circuit diving with trimix When planning and preparing proceed according to the rules with which you were familiarized in a course on diving with trimix 3 1 9 Setting parameters Set or check the settings of all
66. incorrect value reduces the accuracy of pOz control Do not change the value if you do not know your physiological consumption with regards to the conditions of the planned dive 47 2 8 3 Mixtures CCR CCR Eight different diluent mixtures with variable fractions of RX f f Def diluent oxygen nitrogen and helium can be preset Def OC mix Min p02 Select the mixture to edit with the upper key short Max p02 press use tilting for changing the values and cursor position Each mixture can be enabled marked checkbox or disabled clear checkbox This can be done in the editing screen or via a shortcut long press of the upper key in the list of mixtures The mixture that you use as diluent must be among the set mixtures Setting an incorrect diluent composition Diluent 1 Diluent 2 will lead to an incorrect calculation of the Diluent 3 Diluent 4 decompression procedure and can lead to an inaccurate Diluent 5 i j i i i Diluent 6 determination of the proportion of oxygen in the mixture Diluent 7 if the rebreather switches to indirect measuring using Diluent 8 the He sensors See also 3 1 4 Diluent oc Eight different OC bailout mixtures with variable fractions of oxygen nitrogen and helium can be preset Each mixture can be enabled marked checkbox or disabled clear box Only enabled mixtures can be selected Mixtures that you have prepared for bailout stage tank must be entered and enabl
67. int and high setpoint are set These can be selected simply by a long press of the upper key for the high setpoint or lower key for the low setpoint In the default setting the low setpoint has the value of 0 7 bar 70 kPa It is possible to reset it within the range of 0 4 to 1 3 bars In the standard setting the high setpoint has the value of 1 3 bars 130 kPa It is possible to reset it within the range of 0 7 to 1 6 bars Upon starting CCR dive mode the low setpoint is activated by default 42 Descent setpoint The descent setpoint is designed for situations when it is necessary to rapidly descend to a given depth for example when diving in a current The utilized algorithm uses the natural rise of pOz during descent It is necessary to descend rapidly The natural rise of pOz has to be faster than the oxygen consumption Use of the descent setpoint must be enabled in the configuration If it is enabled the descent setpoint is automatically activated when switching from surface mode to CCR mode It cannot be activated in another way The descent setpoint has a variable value The initial set value gives the pOz on the surface At depth the current setpoint increases linearly by 0 2 bar 20 kPa for every 10 m of depth i e it increases by the same absolute values as when diving with an open circuit with air only with a different initial value The descent setpoint is automatically switched to the low setpoint
68. ith an additional spring which is included as a Spare part 1 4 2 Manual diluent bypass valve The manual diluent bypass valve is situated in the lower bulkhead of the inhalation bag and is equipped with a bayonet connector It is attached to the low pressure LP hose with a seatec style quick release connector It is operated by pressing the center button The safety lock prevents diluent valve from accidentally falling out Follow these steps to remove 15 1 5 Exhalation bag The exhalation bag is situated on the right part of the harness from the diver s perspective when wearing the CCR Liberty The design and the way it is connected to the harness and the breathing loop are similar to those of the inhalation bag See also 3 4 2 Cleaning and disinfection 1 5 1 Manual oxygen bypass valve The manual oxygen bypass valve is situated in the middle bulkhead of the exhalation bag and is equipped with a bayonet connector It is attached to the LP hose with an oxygen quick release connector This connector is similar to a standard seatec style quick release but with a shorter collar A standard seatec style quick release connector cannot be connected to the oxygen quick release connector The bayonet connector on the oxygen bypass valve has three protrusions Use oxygen compatible lubricant for maintenance of the oxygen bypass valve 1 5 2 Overpressure
69. lenoid valves which supply oxygen to the breathing circuit 22 1 9 7 Power supply The minimum service life of Li lon batteries is six months The typical service life of the batteries is two years See also 3 1 6 Battery charging Battery compartments are pressure resistant If overpressure is formed inside a battery compartment as a result of battery malfunction or helium diffusion then an overpressure valve will release excess gases out of the rebreather 23 1 10 Visual display units 1 10 1 Handsets The handsets provide the CCR Liberty s user with comprehensive information on the rebreather s status and the course of the dive All functions of the control units are controlled using the handsets The functionality of both handsets is identical Each handset controls both CUs simultaneously In the event of a malfunction of one handset the diver simply uses the other handset During a dive it is possible to set a different display mode on each handset For more information on handset operation see Section 2 Control unit operation 1 10 2 Head up display The head up display HUD shows the current partial pressure or CCR error status during the dive Other statuses are displayed in standby mode during charging and when the unit is connected to a computer If you are not entirely sure what the HUD is displaying check the parameters on the handset display Always check it if the HUD displays a war
70. m 09 December 2014 until 09 December 2017 and remains valid subject to satisfactory surveillance audits Re certification audit due before 19 November 2017 Issue 2 Certified since 28 November 2014 Autnorsed by Fe SGS United Kingdom Limited Notified Body 0120 Un 2028 Ware Parkway Weston super Mare 8522 OWA UK 44 0 1904 522017 1 944 0 1994 522137 wew ags com SGS CE 028 oant Page vat 1 sot Certificate GB14 92281 continued Liberty systems s r o EC Directive 89 686 EEC EC Type examination Issue 1 PPE Product CCR Liberty a closed circuit electronically controlled rebreather with a maximum operating depth 100 m The device incorporates over the shoulder mounted counterlungs a radial scrubber two controllerhandsets head up display automatic diluent valve with an inline isolation valve manual 02 addition manual diluent addition and an intergrated wing style buoyancy control device The device is required to be used with an autonomous bailout system in accordance with the manufacturers user information notice It is certified that the manufacturer s technical file and the above mentioned PPE have been assessed and found to be in accordance with the requirements of Council Directive 89 686 EEC When examined the PPE satisfied the relevant requirements in the harmonized standard EN 14143 2013 The manufacturer s information notice CCR Liberty Dated 27 November 2014 in English has been inspected and foun
71. me manner as accessing a mass storage device via a USB cable though in the case of damage to the CU the micro SD card can be removed from the connector on the control unit board and the dive log can be read using an ordinary reader Logs are generally worked with in the cloud at www wetnotes com However stand alone software for PC Windows 7 and higher is available for download at www CCRLiberty com 81 3 4 6 Long term storage Before storing the rebreather for a period longer than one week proceed according to 3 4 2 Cleaning and disinfection If the CCR Liberty is stored in a dry and clean environment do not connect the corrugated hose assembly with the DSV to the head or to the breathing bags and store the rebreather open Dust occurs even in an environment with the same level of cleanliness as the home environment Limit accumulation of dust by for example covering the unit with a washed cotton bed sheet Store the detached corrugated hose assembly in a suitable container that will not prevent complete drying If you store the CCR Liberty in an environment with a lower degree of cleanliness store it assembled and closed without sorbent Such an environment with a lower degree of cleanliness may be for example a home with pets Before putting the closed rebreather in storage all parts must be thoroughly dried including all creases in the corrugated hoses and the interior surface of the bags Charge the batteri
72. mix and subsequently in a course on diving with the CCR Liberty If you have not successfully completed such a course do not handle the CCR Liberty Diluent Choose the diluent to be breathable and able to flush high oxygen mix from breathing loop Prepare the diluent so the partial pressure of oxygen will not exceed the low setpoint or 1 1 bars which is lower at the greatest depth of your planned dive Partial pressure of nitrogen should not exceed 4 bars 3 2 bars are recomended Regarding to oxygen compatibility and cleanliness for oxygen service of the parts working with diluent do not exceed the oxygen concentration of 21 1 in the diluent Minimum oxygen concentration is 5 Contaminant content of the diluent should not exceed the limits given by the standard EN 12021 Section 6 2 for compressed air for a breathing apparatus Make sure that the diluent was filled by a compressor with properly maintained filters Alternatively you can use an additional personal filter When using a compressor with a combustion engine ensure that the exhaust gases from the engine cannot get into the compressor intake To analyze breathing gas using He sensors the He content should be 35 or more A higher He is better Mixtures with higher helium content are more advantageous for a number of reasons If you are not planning to exceed a depth of 140 m do not use a mixture with a proportion of oxygen smaller than 10 A low O2 mix on the
73. n in the mixture based on the fact that the ratio of inert gases remains constant process according to patent no 303577 This principle of measuring the oxygen concentration and its subsequent automatic conversion on the basis of the known ambient pressure to partial pressure is used as the backup method of measuring pOz in case all electrochemical pOz sensors malfunction This method is intended for use only in emergency situations If possible use the apparatus for bailout Do not disassemble the sensors disassembly can result in irreparable damage 1 9 4 Pressure and depth measurement Each of the CCR Liberty s control units uses dual pressure sensors The first sensor intended for measuring low pressure is used for determining sea level for calibration of the pO sensors and for improving the accuracy of depth data in shallow depth The second sensor is intended mainly for measuring hydrostatic pressure The maximum scope of the sensor corresponds to the depth of 300 m 1 9 5 Temperature measurement The temperature in the breathing circuit is measured by temperature sensors within the pressure sensors The water temperature sensors are situated in the handsets Temperature data serve primarily for correction of the measuring of other quantities The water temperature shown on the HS display is only approximate 1 9 6 Solenoids The control units communicate with each other and in normal circumstances open the so
74. n the COz scrubber canister When mounting the head push the scrubber canister pin into the opening on the head and close the head Press the head from above so that it is fully seated If too much force is required to completely close the head apply a small amount of lubricant to the O ring on the neck of the head You can also choose an O ring with a smaller cross section diameter 62 Procedure 1 3 1 4 Mount the body of the apparatus on the frame so that the recesses in the lower part fit into the protrusions on the base Lift the lever in the center of the backplate Press the rebreather body against the backplate so that the tongue in the upper part of the backplate fits into the recess in the head of the apparatus If necessary forcefully press the top of the head downward Press down the lever in the middle of the apparatus and check whether the lock is closed Check whether the apparatus is firmly attached Secure the body with the securing strap Attaching the counterlungs and hoses The position of the counterlungs in relation to the diver s body determines inhalation and exhalation resistance and work of breathing Adjust the position by shifting the upper strap on the back side of the counterlung Procedure 1
75. n the diver s body is based on the backplate and harness common among wing type buoyancy compensators used in technical diving The body of the rebreather comprised of the scrubber canister and attached head is attached to the backplate with a cam The cam lever cannot be released when the diver is wearing the rebreather The CCR Liberty s integrated stand which o serves as a lumbar support is intended for Pan setting the rebreather on a hard level surface with sufficient rigidity Always a secure the standing rebreather to prevent falling If needed it is possible to remove the CCR Liberty s backplate together with the buoyancy compensator from the components specific for the rebreather and use it with the harness for open circuit diving It enables attachment of a twin set two tanks firmly connected with stainless steel bands using bolts and wing nuts as is common in technical diving as well as attachment of a single tank with a strap with fastener not included with the CCR Liberty With the slot in the lower part the rebreather s body fits into the protrusions of the stand 26 1 12 Harness The backplate is equipped with harness that is threaded through in a way th
76. nd with a tremendous intense urge to inhale it is apparent that the scrubber is not functioning premature depletion of the sorbent occurrence of channels in the sorbent by which air circumvents the scrubber or there is a mechanical malfunction that has caused air to not pass through or to only partially pass through the scrubber malfunction of the directional valve on the mouthpiece joining of the inhalation and exhalation sides outside the scrubber Switch to bailout and terminate the dive If holding your breath does not cause problems the scrubber is working properly Over the next several minutes limit all other activity and concentrate on slow breathing 3 5 5 Inadvertent release of the mouthpiece When the mouthpiece falls out of the diver s mouth the DSV has a tendency to float However its connection to the breathing bag prevents it from floating beyond the diver s reach If it falls out it is necessary to immediately return the mouthpiece to your mouth If the mouthpiece is returned quick enough a significant amount of water will not have entered the breathing loop If this problem is not solved quickly then the loop would flood In this case proceed according to the following chapter 3 5 6 Flooding 86 There may be a strap bungee cord holding the DSV which prevents the mouthpiece from accidentally falling out Adjust the length of the bungee by shifting the knots 3 5 6 Flooding The probability of signific
77. ning outer LED blinks red or an alarm all three LEDs flashes red four times See the following table for the various HUD signals 1 10 3 Buddy display The buddy display shows whether the values of the partial pressure of oxygen are within the range that is suitable for breathing or if an error situation has occurred The displayed information is intended for the diving partner of the CCR Liberty s user Prior to diving the user of the CCR Liberty must familiarize his her diving partner with the buddy display s functionality and agree on the emergency procedure to be carried out in the event that the buddy display indicates an error situation See the following table for the various buddy display signals 24 HUD and buddy display signals HUD signals Mode Event state BD signals LED 1 LED 2 LED 3 Startup Initializing components Binary coded service numbers pOz lt 0 16 red blinking red blinking red blinking 0 16 lt pO lt 0 20 red blinking red blinking red 0 20 s pO lt 0 25 8X blue flash green e 7X blue flash green 6X blue flash green 5X blue flash green 4x blue flash green 3X blue flash green p02 2X blue flash green in dive mode 1x blue flash green bar standard green arden 1x green flash green 2X green flash green 3X green
78. nside of an automobile for example In order to prevent the sorbent from falling into the central tube place the lid of the sorbent canister on the opening or plug it by other suitable means Pour sorbent into the cartridge until it is approximately one third full Then gently lift the cartridge and allow it to fall three times from a height of approximately 1 cm 1 2 Repeat this process when the cartridge is two thirds full and again when it is completely full The cartridge is completely full when the sorbent reaches a level between the min and max lines marked on the central tube After filling close the lid and pressure plate with springs and press down Then remove the pressure plate and lid and verify that the surface of the sorbent is levelled and that no channels have formed in it Then close the lid and pressure plate with springs again 60 press down and secure the assembly with the retaining ring The retaining ring must fit into the slot in the pressure plate If the cartridge is not filled sufficiently a gap of less than 6 mm or no space at all will remain between the edge of the lid and edge of metal mesh In such a case add sorbent and then shake and close the cartridge according to the procedure described above If the cartridge is overfilled there will be a gap greater than 17 mm between the edge of the lid and the edge of the metal mesh and it will not be possible to insert the retaining ring withou
79. nsider whether diving with a rebreather represents too great a risk for you Solenoids have stopped delivering oxygen If the partial pressure falls significantly below the setpoint but there is still sufficient pressure in the oxygen tank use the manual bypass valve to add oxygen Add oxygen gradually with short presses Breathe regularly Oxygen is delivered to the exhalation bag It takes several inhalations before the oxygen in the scrubber blends with the breathing mixture and reaches the sensors on the inhalation side If the situation persists control the delivery of oxygen manually In a stabilized state invariable depth and with a low level of exertion slow swimming it is necessary to add oxygen approximately once or twice per minute This malfunction does not pose an immediate threat to the diver However do not continue in your descent or penetration Start your return and ascent Manual O2 bypass valve free flow Disconnect the quick release Disengaging the quick release connector causes a disruption of the oxygen delivery via the manual bypass valve This malfunction does not pose an immediate threat to the diver However do not continue in your descent or penetration Start your return and ascent Manual bypass valve does not function oxygen is not added after pressing This malfunction does not pose an immediate threat to the diver However do not continue in your descent or penetration Start your return and ascent
80. nt the mixture delivered to the DSV is practically identical to the diluent If you use diluent with low oxygen content e g when starting a descent to a great depth it is necessary to significantly limit the descent rate Continue this until you reach a depth where the pOz in the diluent exceeds 0 16 bar Do not descend rapidly in order to to reach the depth at which the mixture is breathable Low partial pressure of oxygen in the loop leads to significantly faster loss of consciousness than if you descend while holding your breath Do not take this risk 76 3 3 10 Controlling buoyancy and trim When diving with a rebreather buoyancy cannot be controlled by breathing as in open circuit diving Since you are breathing within a closed loop there is no effect on the overall buoyancy Buoyancy including minor corrections is controlled with the compensator For a very small temporary increase of buoyancy e g when swimming over an obstacle instead of using the compensator you can add a small amount of diluent into the breathing loop and breathe using the top of your lungs Though this method is convenient it also leads to a greater consumption of oxygen and diluent Remember swimming around an obstacle is better than swimming over it Keep balance corrections to a minimum by using other sources of buoyancy such as a dry suit The increased difficulty of controlling several sources of buoyancy would overload the diver with tasks
81. nt replacement procedure Handle the sorbent in accordance with the manufacturer s instructions Comply with all safety instructions and use protective gear Take environmental protection into account when disposing of used sorbent Remove all of the old sorbent content from the cartridge If you disinfect the rebreather proceed according to 3 4 2 Cleaning and disinfection However it is preferable to disinfect after a dive rather than waiting for a longer period Place the scrubber cartridge on a clean surface Handle it with clean thoroughly washed hands We recommend using disposable surgical gloves Dirtying the cartridge can contaminate the breathing circuit and cause infection A seemingly clean surface can be contaminated with microbes especially in tropical and subtropical conditions If you cannot ensure the cleanliness of a surface place the cartridge on a clean towel Follow these hygienic principles not only when filling the scrubber but also when handling it in any way If you are working outside recommended and there is at least moderate wind stand sideways to the wind and pour the sorbent slowly into the cartridge from a height of approximately 20 30 cm 1 ft Allow the wind to remove the finest dust particles If you are working indoors pour the sorbent into the cartridge from a minimal height Sorbent dust is aggressive and can cause corrosion Therefore we do not recommend working with the scrubber i
82. o the circuit Manual bypass valve free flow Disconnect the quick release Disengaging the quick release connector causes a disruption of the diluent delivery via the MBV This malfunction does not pose an immediate threat to the user The dive can continue with automatic delivery of diluent into the circuit using the ADV Manual delivery of diluent can be accomplished by pressing the ADV Manual bypass valve does not function diluent is not added after pressing This malfunction does not pose an immediate threat to the user The dive can continue with automatic delivery of diluent into the circuit using the ADV Manual delivery of diluent can be accomplished by pressing the ADV Neither the ADV nor the manual bypass valve functions If the diluent pressure gauge indicates sufficient pressure a malfunction in the first stage of the diluent regulator has likely occurred and it is no longer possible to add diluent to the circuit In this case it is necessary to terminate the dive During the ascent the diluent in the circuit expands and thus replenishes its volume in the circuit If possible do not increase depth during your return If the volume of diluent in the circuit is sufficient it is possible to breathe from the rebreather If it is not sufficient it is necessary to switch to the bailout breathing apparatus Bear in mind that in this case it is not possible to perform the standard procedure for high pO flushing out the loop ad
83. ompensator is not functional use other means of attaining buoyancy If the compensator s capacity does not suffice or if it is not possible after a malfunction to fill it with an inflator or orally use your dry suit to attain buoyancy The CCR Liberty user must have sufficient knowledge and skill to safely use a dry suit as a backup source of buoyancy If it is not possible to attain sufficient buoyancy by using the compensator and dry suit and if at the same time there is no other appropriate option jettison the ballast If it is not necessary to completely jettison the ballast try to attain buoyancy by first jettisoning the ballast on the left side and then if necessary on the right side Jettisoning ballast on the left side helps to bring the dry suit release valve and the compensator s inflator in a position suitable for deflation Jettisoning ballast is a skill that in addition to agility and mobility requires training under the supervision of an instructor in a CCR Liberty diving course 87 3 5 8 Rescue on the surface When assisting an injured CCR Liberty user on the surface it is possible to increase buoyancy by jettisoning the ballast Even if the diver s life is in serious danger and it would be necessary to jettison all equipment during the rescue buoyancy should be ensured by closing the DSV inflating the compensator wings and jettisoning the ballast Complete removal of the CCR Liberty and any other equipment atta
84. onment The purpose of regular cleaning and disinfection is to prevent the multiplication of these microbes to an extent that would pose a hazard to the user and to prevent the transmission of infection between various users Not more than a week may pass from the first dive after disinfection until the next disinfection if the CCR Liberty is stored in a cool place When storing the rebreather at a temperature higher than 25 C this interval is shortened to four days the weekly interval can be maintained only for the scrubber cartridge It does not matter how many dives you undertake during the stated period Disinfection is always necessary before changing users of the CCR Liberty Never lend or borrow a rebreather that has not been disinfected Transmission of infection can happen with a single inhalation An infected user will not necessarily have any symptoms of infection Start cleaning by rinsing the assembled rebreather with clean fresh water Disassemble the rebreather into its individual parts Procedure 1 remove the ballast 2 unscrew and detach the oxygen and diluent tanks insert watertight stoppers in the regulator inlets remove the HUD from the DSV remove the breathing bags with corrugated hoses from the head remove the ADV manual valves and overpressure valve from the breathing bags Oe detach the breathing bags from the harness 79 7 remove the head with the attached handsets and HUD 8 remove the
85. or diving while onboard a boat secure it using the holes in the upper part of the backplate to the back part of a bench This will give you full access to the tanks for filling and you can easily remove the head and scrubber canister 3 7 3 By plane Pressure tanks Airline regulations generally require that all transported pressure tanks should be empty with valves dismounted Place the valves in clean PE bags Ziploc and place duct tape over the neck to prevent contamination It is possible that security personnel will want to look inside the tanks therefore it is not appropriate to use tight plugs that cannot be removed without tools When checking your luggage at the airport notify the airport personnel that you have pressure tanks in your luggage Depending on local regulations it is possible that you will have to take the tanks to a special counter Consider whether it might be better to rent pressure tanks at your destination Dive centers equipped for closed circuit diving usually have available tanks that can be used with the CCR Liberty If you want to pre arrange tank rental which is highly recommended refer to the size specifications available at www CCRLiberty com 93 Sorbent The sorbent canister should be empty If you are also transporting a supply of sorbent it must be in the original packaging or in an appropriately sturdy and airtight container Familiarize yourself with the valid regulations concerning the air
86. pO It is possible that a short term decline will happen but this will be automatically corrected with of two to three inhalations Before starting an ascent check to ensure that the oxygen tank valve is open During the ascent expansion of the mixture in the breathing circuit occurs due to the reduction of ambient pressure It is necessary to expel the excess breathing mixture The overpressure valve on the exhalation right counterlung is used for this purpose Open the overpressure valve completely Some divers consider it more convenient to expel excess breathing mixture via the nose through the mask Do not expel excess mixture via the mouth around the mouthpiece as doing so increases the risk of water leaking into the breathing circuit 78 3 4 Post dive procedures 3 4 1 Immediately after surfacing Close the DSV put the rebreather in a suitable place close the tank valves and switch off the control units If a stable firm and level surface is available set the rebreather up on its stand and take measures to prevent it from falling If you are in the field where it is not possible to place the rebreather on its stand lay it down When handling the rebreather focus particular attention on protecting the corrugated hoses against damage 3 4 2 Cleaning and disinfection When in use the rebreather s breathing loop is colonized by microorganisms from the diver s respiratory tract and from the external envir
87. pensator 28 1 14 BallaSts rennende 29 1 15 Weights of individual parts 30 Section 2 Control unit operation 31 2 1 Control elements 32 2 1 1 Meanings of inputs in surface modes 32 2 1 2 Meanings of inputs in dive modes 33 2 1 3 Languadges noora 33 2 2 Switching on the unit 34 2 2 1 Activation aistiin sinnini 34 2 3 Surface Mode eere 35 2 3 1 Entering surface Mode 35 2 3 2 Surface mode primary screen 35 2 3 3 Surface mode 02 sensors screen 36 2 3 4 Switching to other modes 36 2 3 9 POLCOMON onerosi eena dns dd seba b 37 2 4 Dive mode n 38 2 4 1 Detailed screen 2 4 2 Synoptic screen 24 3 Big Screenin eikiandaneains 2 4 4 Dive profile screen 41 2 5 CCR MOGs 42 2 5 1 Entering CCR mode 42 2 5 2 Switching to other modes 42 2 5 3 pOzregulation nnen annees 2 5 4 Decompression seereis 2 5 5 Specific handset control 2 6 Manual CCR mode eeen 2 6 1 Entering manual CCR mode 44 2 6 2 Switching to other modes 44 2 6 3 pO2 regulation een 44 2 6 4 Decompression nnen aranea eener 44 2 7 Bailout OC mode nnen 45 2 7 1 Entering bailout OC mode 45 2 7 2 Switching to other modes 45 2 73 MIXEUPE so aaretaenerrsensenandantenkenenbensneeesrenkeen denks 45 2 7 4 Decompression unserer oneness 45 2 7 5 Specific handset control 45 2 8 Set
88. period range 0 120 s 0 means that the display will be constantly active Dive mode screens Orientation Any of the five following screens can be Screensaver enabled or disabled This can be done during edes kk Dive mode screens a dive Detailed the primary screen displays all necessary information Synoptic the depth value is easy to read it is accompanied by other important information Big the most important information written in really big characters Graph Dive profile screen O2 sensors detailed state of the sensors Auxiliary displays Setting the position of HUD and buddy display The default positions are on the right side for HUD and on the left side for BD Color blind mode If you cannot distinguish blue and green LED lights on HUD switch color blind mode on See 1 10 2 Head up display 53 Timeouts Key press delay 1 Minimum key press duration range 1 5 in 100 ms Auto switch off The time period after which the CCR Liberty switches from surface mode to standby mode range 0 999 min 0 deactivates automatic switching to standby mode If no handset is connected switch off will occur after 150 minutes regardless of the setting Units Metric Metric and imperial units or more precisely the US traditional systems of weights and measure can be set for the entire apparatus All physical calculations are internally executed using the metric system results are converte
89. r gas duration calculations is 1 78 l min according to the EN 14143 When considering the initial tank pressure of 200 bar and a final pressure of 50 bar in the tank the oxygen supply suffices for 253 minutes In this calculation oxygen contained in the diluent is not considered These conditions correspond to high levels of physical effort during a dive If a diver is calm during a dive consumption significantly decreases and the quantity of oxygen and the sorbent service life is extended A dive plan which relies on the fact that the whole dive will be in a low effort is wrong In any case an oxygen tank filled to 200 bar is sufficient for a dive which greatly exceeds the duration of the CO2 scrubber If the pressure in the oxygen tank is lower than 70 bars even a brief dive should not be started According to the valid technical standards filling oxygen to operating pressure greater than 200 bars is prohibited 66 3 1 6 Battery charging Before charging the batteries remove the jumpers from the sockets We recommend charging the batteries to full capacity one week or less before diving Before a brief dive up to one hour it is permissible to store fully charged batteries for up to one month Do not completely discharge the batteries before charging The service life of the batteries is extended by frequent charging For charging the batteries use the enclosed charger or any USB charger dimensioned to 2 A mos
90. reather 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 reguire procedures that deviate from this manual and from standard procedures taught in a course accredited by the rebreather s manufacturer 12 1 3 Corrugated hoses and accessories KY SSS LZ 1 3 1 Hoses The corrugated hoses are made of EPDM rubber Compatible chemical agents must be used for cleaning and disinfection see Chapter 3 4 2 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 like 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 13 Elbow on the inhalation side left and exhalation 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 w
91. ry of digits for which tilting is used in surface modes is limited during the dive to special cases only Tapping on the display glass switch on activate the display if it is switched off deactivated Shining a light on the display in the dark illuminating the display with a dive light activates it in the same way as tapping on the glass In the light the display can be activated by covering and then uncovering it 2 1 3 Language All textual information on the CCR Liberty is in English Controlling the apparatus requires knowledge of the English language at a level that at least allows the user to thoroughly understand this information 33 2 2 Switching on the unit In order for it to be possible to switch on the CCR Liberty s control unit it must be in standby mode which is indicated on the HUD slowly flashing blue LED and the buddy display slowly flashing green LED If the jumpers are removed or turned so that the pins are not inserted in the connector the rebreather s control unit cannot be turned on except with USB power when connected to a computer via an adapter 2 2 1 Activation The device is activated by pressing both keys on either handset for three seconds Automatic activation occurs in the event of entering the water with a deactivated rebreather In such a case the user cannot continue the dive but must perform complete pre dive preparation on the surface as soon as possible Using autom
92. s automatically started at the beginning of the pre dive inspection Testing is automatic Confirmation by the user is reguired only in the event that the test result is negative 3 2 2 Negative pressure test The purpose of this test is to detect possible leakage in the breathing loop which appears when the pressure in the loop is lower than the ambient pressure The test is conducted immediately before diving after transport with a fully assembled rebreather Procedure 1 Close the diluent and oxygen tank valves 2 Open the DSV and create sufficient underpressure with your mouth according to the indication on the HS display 3 Close the DSV and cease all movement with the rebreather in particular do not move the bags and corrugated hoses 70 4 Wait 60 seconds the countdown runs automatically on the display 5 If the pressure indicator stops in the green field the test result is positive Final evaluation of the test and confirmation of the result are left at the user s discretion See also Chapter 3 6 2 Leak detection 3 2 3 Positive pressure test The purpose of this test is to detect possible leakage in the breathing loop which appears when the pressure in the loop is higher than the ambient pressure Procedure 1 Close the oxygen tank valve open the diluent tank valve 2 Close the DSV and close the overpressure valve 3 With the manual diluent valve create sufficient overpressure according to the
93. s that come into contact with oxygen under pressure 3 6 1 Tools and replacement parts Your toolbox for resolving problems in the field should contain e Surgical gloves e Roll of paper towels e PE bag for storing the scrubber cartridge e DSV mushroom valves 2 pcs e Mouthpiece e Tightening straps e Oxygen compatible lubricant e 2 5mm and 3 mm hex keys e 1 Phillips screwdriver e Tool for removing O rings O ring pick plectrum bamboo toothpick e Adjustable wrench e Duct tape e Permanent waterproof marker for writing on duct tape e Set of O rings 89 3 6 2 Detection of leaks If the source of a leak is not apparent we recommend using overpressure to the find the leak Leakage can generally be found by submerging the entire rebreather or a part in water while exerting pressure in the breathing loop It is also possible to find leaks by applying a soapy solution on a certain area After eliminating the problem negative and positive pressure tests must be repeated 3 6 3 Regular service inspection The CCR Liberty requires yearly service inspections maximum 13 months or after 150 hours of usage whichever occurs first Service inspections must be performed by a service technician certified by Liberty Systems or performed by the manufacturer The replacement of components and the inspection process are determined by the manufacturer s guidelines valid at the time of inspection 3 6 4 Long term maintenanc
94. surface and in small depths with a lack of breathability significantly increases risks After filling write the mixture composition with a permanent marker on a label piece of duct tape and attach it to the tank The consumption of diluent depends on the dive profile frequency and extent of depth changes Diluent capacity is not limited by time but by the dive profile This should be taken into account especially when planning dives in caves Diluent is consumed mainly during the descent During the ascent there is a zero theoretical consumption and any practical consumption is mainly due to mask clearing Based on a practical experience the typical diluent consumption during a simple dive to a depth of 100 m is approximately 50 to 70 bar It does not increase by staying longer at the same depth 65 Always keep a sufficient safety margin at least 50 bar to cover unforeseen situations If the pressure in the diluent tank is lower than 70 bars even a brief dive should not be started The standards according to which the CCR Liberty is CE certified and designated do not cover diving to depths greater than 100 m Therefore CCR Liberty is CE certified to 100 m Oxygen Use oxygen intended for breathing Contaminant content of the oxygen shall not exceed the limits given by the standard EN 12021 Section 6 2 for compressed air for breathing apparatus We recommend using oxygen with a purity of at least 99 5 Oxygen consumption fo
95. t chargers used with vehicle power outlets are not sufficiently dimensioned Fully discharged batteries require approximately eight hours of charging with the charger Charging from a computer s USB port is possible though charging is done with a significantly lower current The time required for charging fully discharged batteries in this manner is approximately 15 hours Charging from a computer s USB port can be done via an adapter connected to the external connector of the handset In you prepare the CCR Liberty for diving no more than one week after charging insert the jumpers so that their pins are inserted into the connector The rebreather will thus be switched to standby mode and it will be possible to switch on the control unit using the handset Otherwise insert the jumpers in reverse position with the pins outside in this position the power supply is completely disconnected and the control unit cannot be switched on 3 1 7 Calibration of the oxygen sensors Insert the measuring jig into the inhalation opening in the center of the head The head can be but does not have to be mounted on the scrubber canister Connect the flow limiter to the oxygen hose quick release A hissing sound that accompanies the flow of oxygen can be barely heard in a quiet environment The flow also becomes apparent on a moistened finger covering the discharge aperture Connect the sampling tube between the flow limiter and measuring j
96. t excessive force In such a case remove the excess sorbent with a clean teaspoon or any other suitable tool Shake the cartridge and close the lid again Before inserting the cartridge into the scrubber canister check to ensure that the water trap is dry If that is not the case remove the water trap and dry it with a towel Sorbent dust damages textiles especially polyamide and cotton fabrics Therefore after working with the scrubber immediately rinse the towel on which the cartridge was placed and all clothing that was exposed to sorbent dust Do not work with sorbent in the vicinity of load bearing straps ropes or even metal mountain climbing or speleological equipment In the event of possible exposure to sorbent ropes and load bearing straps should be discarded immediately as their load bearing capacity can deteriorate significantly Condition of the scrubber before submersion The scrubber must have sufficient absorption capacity for the planned dive The sorbent must contain moisture so that chemical reactions that enable the scrubber to remove CO from the breathing mixture can take place This means that it cannot be completely dry and cannot be frozen In freezing weather stow the rebreather in a warm space prior to the dive If you are outside with the apparatus and a delay happens maintain the temperature of the sorbent by breathing from the apparatus 61 3 1 2 Assembling the rebreather body Mount the head o
97. t of the mixture in your lungs for removing water from the mouthpiece of the bailout apparatus 3 Perform the standard procedure associated with starting breathing from the bailout apparatus e g for stage tanks check to be sure that you are breathing from the correct stage tank If you subsequently resolve the rebreather malfunction or if you determine that the cause of the problem is outside the rebreather you can resume breathing from the rebreather After switching to bailout OC mode the safety level is automatically set using the bailout gradient factors BoGF It is possible to switch between the standard and bailout GF sets in the menu without affecting the mode in which the CCR Liberty is operating Knowledge and skills related to the use of the stage bottles are among the entry requirements necessary for everyone interested in diving with CCR Liberty In the CCR Liberty diving course accredited by manufacturer the use of stage bottle in the role of backup breathing apparatus is thoroughly practiced 3 5 2 Oxygen source malfunction Low pressure in the oxygen tank In this case it is necessary to terminate the dive It is necessary to switch to the bailout breathing apparatus no later than when the partial pressure of oxygen in the circuit falls below 0 3 bar 83 If this situation arises due to a lack of thoroughness when preparing for the dive or due to failure to regularly check the pressure during the dive please co
98. the CCR manual CCR bailout and standby modes If submerged to a depth greater than 1 5 m the rebreather automatically switches to CCR mode 36 2 3 5 pOz control Simple pOz control is started in surface mode If the oxygen content in the loop falls below 19 with respect to the current atmospheric pressure pOz is increased to 23 by opening the solenoid Then Oz is injected in six second intervals This control algorithm is intended to prevent the dangerous decline of pOz and the subsequent loss of consciousness by the user who could mistakenly breathe from the circuit without activating dive mode pO2 control is subject to other conditions the oxygen tank must be full connected and open pOz sensors must be installed and calibrated and the user may not exert excessive effort which causes high consumption of oxygen pOz control in surface mode only maintains the oxygen level closely above the hypoxia threshold therefore it may not be used routinely for breathing 37 2 4 Dive mode 2 4 1 Detailed screen 26 31 12 39 The primary screen displays all necessary information 12 2 during a dive Most information is provided by clear 51 0 values and unambiguous symbols 95 Dive time 1 38 1 32 ai 1 29 1 24 1 24 The timer starts after submersion depth gt 1 5 m and halts after surfacing depth lt 0 5 m In case of stay on the surface or at very shallow depth followed by a second submersion during a
99. time that you need help Oxygen and diluent pressure We recommend checking the pressure of oxygen and diluent approximately once every five minutes Compared to an open circuit apparatus the oxygen and diluent tanks have a small volume Even a minor leak can cause rapid loss of pressure Therefore it is necessary to check the oxygen and diluent pressure gauges SPGs more frequently than when diving with an open circuit 33 0 Switching to CCR mode In surface mode bring up the menu and switch to CCR mode Perform an inspection according to the displayed checklist 3 3 6 Water entry Do not enter the water without having performed a pre dive inspection according to Chapter 3 2 Pre dive inspection We recommend breathing from the rebreather for at least three minutes right before entering the water in order to make certain that the scrubber and the rest of the apparatus are working properly 75 In freezing weather do not allow the scrubber to cool down after transferring the rebreather from a warm environment Limit the rebreather s exposure to freezing air If necessary keep the sorbent warm by breathing from the rebreather We recommend gradually entering the water and submerge the rebreather slowly If it is necessary to jump into the water preferably use the giant stride method whereby your legs and buttocks impact the water first thus protecting the breathing bags and corrugated hoses from direct impact Wh
100. unctions 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
101. up ven eee ne an 2 8 1 Editor use 28 2 SCEPOIMMUS si cicecerecveacivess anna k ka annees tees 29 3 MIXLUFOS sarveartern tieerd ition doeh wat 2 8 4 Decompression nun eee eee 49 28 5 AlanMs sns arnnerenrennssnnnnneinerdean aistii 51 2 8 6 Preferences innet siere 53 28 1 o Calibration eein aea e as 54 2 8 8 Faulty sensors eee 55 2 8 9 Miscellaneous anavsr enen oneenere even 56 29 Games ons aa ed lee de de 57 29 1 SOKOD AM sicsiciseieteciesseesesesdeciecesiescadeedueeviesscnee 57 2 92 SNAKC ci a r ane la Te AEE Er sender EEIE 57 Section 3 Procedures ns sansenrn DO 3 1 Dive preparation 59 3 1 1 Replacement of CO2 sorbent 59 3 1 2 Assembling the rebreather body 62 3 1 3 Mounting the rebreather body ee 63 3 1 4 Attaching the counterlungs and hoses 63 3 15 Tank filing anssen beende ead etise eene 64 3 1 6 Battery charging nanne eneen 67 3 1 7 Calibration of the oxygen sensors 67 3 1 8 Preparing the bailout apparatus 68 3 1 9 Setting parameters 68 3 1 10 Directional valve check 3 1 11 Physical inspection 3 2 Pre dive inspection nn 3 2 1 Internal testing of the control units 70 3 2 2 Negative pressure test unne 70 3 2 3 Positive pressure test 71 3 2 4 Solenoid testing 71 3 2 5 Battery testing 71 3 2 6 Helium Sensor test annen ennen 3 2 7 Comp
102. valve 11 1 2 3 MOUtNPIOCE anssen kosou asana koda dk k alena 12 1 2 4 Usage with a full face mask 12 1 3 Corrugated hoses and accessories 13 1 3 1 1 3 2 Attachment to the head ne 13 1 3 3 Connection to the breathing bags 14 1 3 4 Attachment of the DSV z 14 1 4 Inhalation bag nnn 15 1 4 1 Automatic diluent valve nnn 15 1 4 2 Manual diluent bypass valve 15 1 5 Exhalation bag 16 1 5 1 Manual oxygen bypass valve 16 1 5 2 Overpressure valve nnn anneer enen 16 1 6 Oxygen tank eee 17 1 6 1 1 6 2 1 6 3 1 6 4 Pressure reading 17 1 7 Diluent tank 18 El Tal G iir 18 172 NAN Gs enneint 18 1 7 3 Reduction valve and pressure reading 18 1 7 4 Backup regulator optional 18 1 8 COzserubberran omni 19 1 9 Head nn 20 MOE Control UNIS enerenavensenesenennertenen neee 21 1 9 2 Direct measurement of poz 21 1 9 3 Measurement of He content 22 1 9 4 Pressure and depth measurement 22 1 9 5 Temperature measurement z 1 9 6 SOIGMOIAS sai senenin siucair sicas 1 9 7 POWGr SUPPIV irsini eieniiniiniaeeiansinininias 23 1 10 Visual display units 24 WMV 1 MANASOLS ose Asanace ras noc edes 24 1 10 2 Head up display annees 24 1 10 3 Buddy display 24 1 11 Backplate and mounting 26 1 12 Harness een ener 27 1 13 Buoyancy com
103. y onto empty squares never through walls or boxes The player can also move into a tank which pushes it into the square beyond Tanks may not be pushed into other tanks or walls and they cannot be pulled The puzzle is solved when all tanks are in the storage locations 2 9 2 Snake Snake is a game where the player maneuvers a line which grows in length with the line itself being a primary obstacle The player controls the head of the snake As it moves forward it leaves a trail behind resembling a moving snake The snake has a specific length The player loses when the snake runs into the screen border a trail or another obstacle or eats poison skull or starves to death The snake lose its length slowly every 30 steps and when it is too short it dies from starvation The player attempts to eat fish by running into them with the head of the snake Each fish eaten makes the snake longer so maneuvering becomes progressively more difficult 57 Section 3 Procedures 3 1 Dive preparation add Replacement of CO2 sorbent Sorbent service life Continually keep records of the extent of consumption of the scrubber cartridge Set a stack time warning and don t forget to reset the stack timer after replacing the sorbent If ever in doubt replace the sorbent The recommended scrubber filling material is Sofnolime 797 sorbent producer Molecular Products The cartridge holds approximately 2 5 kg of sorbent The

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