KiSS GEM User manual
PATENT PENDING MSL 72.145 Jetsam/GEM R.6
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READTHISMANUAL
KISSGEMDIVERSMUSTREADTHISMANUAL.
INORDERTOFULLYUNDERSTANDYOURNEWGASEXTENDER/REBREATHER,THE
COMPONENTS,HOWTHEYWORK,HOWTOHANDLEANDTREATTHEM,YOUMUST
READTHEMANUALINFULL.
THISSHOULDBEDONEPRIORTODIVINGORSERVICINGTHISUNIT!!!SPECIALAT-
TENTIONSHOULDBEPAIDTOALLNOTES&/ORWARNINGS;THEYMUSTBEREAD
ANDUNDERSTOOD!!!!FAILURETODOSO,MAYCAUSESERIOUSINJURYOR
DEATH!!!!
THISMANUALINNOWAYREPLACESTHETRAININGREQUIREDFORDIVINGASEMI-
CLOSEDREBREATHER.PROPERTRAININGISEXTREMELYIMPORTANTASISGATH-
ERINGTHEPROPEREXPERIENCE.
YOUMUSTBE18YEARSOFAGEINORDERTOPURCHASEANDDIVEAKISSGEM
DIVINGSYSTEM
Aswithallscubadivingequipment,yourKISSGEMdivingsystemshouldbeser-
vicedannuallybyaGEMservicetechnician.Forthosedivingfrequently,servicing
mayberequiredmoreoften.
ALLINFORMATIONINTHISMANUALISSUBJECTTOCHANGE.
PLEASEVISITOURWEBSITE,www.kissrebreathers.com/manuals.html,
FORUPDATEDMANUALS.
PATENT PENDING 3 MSL 72.145 Jetsam/GEM R.6
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THISISNOTAJOKE!!
Participationinrebreatherdivingcanresultinseriousin-
juryordeathtoyou,thediver!
ThewarningontheKISSGEMGasExtenderisnotajoke.Beforebeginningyour
dive,youmustconsidertherisksinvolved.TheGEMconsistsofmanyparts.Allof
thesecomponentswilleventuallyfail.Carefulmaintenance,assembly,andtesting
willnotpreventthisfromhappening.Atbest,itwilldelaythefailure.TheKISS
GEMisnotautomaticinanyway.Itrequiresconstantmonitoring,acomplete
awarenessofthepotentialproblemslikelytobeencountered,andfullknowledge
ofhowtodealwithwhateverproblemsmayoccur.Ifyoudonothaveadequate
training,equipment,physicalconditioning,andapropermindset,donotgetinthe
water.
Thediver,YOU,hasthefinalresponsibilityforhisorherownsafetyandactions
whileusingthisrebreather.AllcomponentsoftheKISSGEMmustbeingood
workingorderandbeproperlyassembledandtestedtoreducetheriskoffailure.
Regardlessofthetrainingandexperienceofthediverandthereliabilityofthere-
breathertheriskofseriousinjuryand/ordeathcanneverbereducedtozero.
ThismanualisnotacompletetextonthemaintenanceandoperationoftheKISS
GEM.Thedivermustcompleteapropertrainingcoursecoveringthemainte-
nance,testingandoperationofthesemi-closedrebreatherbeforedivingthis
equipment.Therebreathercanmalfunctionwhiledivingevenwhenproperlyas-
sembledandhavingpassedallpre-divetests.Onlycarryingadequategasand
havingthetrainingandskillsnecessarytoswitchtoopencircuitgas,canreduce,
butnevereliminate,theriskofequipmentfailure.
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ACCEPTABLENITROXMIXTURES&GEMINFORMATIONPAGE
Level1KISSGEMdiversarecertifiedtouseNitroxmixturesfrom32%nitroxto40%nitrox.DONOTUSEMIX-
TUESWITHLESSTHEN32%!!!!Whenusingacceptablenitroxmixturesthereareseveralthingstobeawareof:
1. The higher the nitrox mixture, the less chance of hypoxia. Also the shallower maximum operating depth (MOD).
2. The lower the nitrox mixture, the greater chance of hypoxia. Also the MOD will be deeper.
3.Care must be taken to ensure that while doing deeper KISS GEM dives, that divers stay within their training level
and are careful to not accumulate unexpected decompression obligations. DECOMPRESSIONDIVINGISRISKY
ANDINVOLVESSPECIALIZEDTRAINING.DONOTDIVETHEGEMDIVINGSYSTEMOUTSIDEYOURCERTIFICA-
TIONLEVEL!LEVEL1GEMDIVERSSHOULDNOTBEDOINGDECOMPRESSIONDIVING!!
4. Every human body will metabolize the oxygen in the nitrox breathing mixture differently. Therefore, a diver and
his buddy may notice that their breathing gas PPO2/FiO2 percentage may not be similar. A small person will use
much less oxygen then a larger person.
5.Many divers will find that using a 36% nitrox or higher breathing gas in the KISS GEM diving system will enable
them to always have a safe breathing gas underwater. HOWEVER, this may not be true for all divers, or in all
situations! GREATCAREMUSTBETAKENTOALWAYSKNOWWHATYOUAREBREATHING!!THESHALLOWER
THEDIVERIS,THELOWERTHEPPO2/FiO2MAYDROP!!ALSO,ITWILLDROPQUICKLYONTHESURFACE.
DIVERSMUSTNOTGOBYTHEIRBUDDYSGAUGE;THEYMUSTMONITORTHEIROWNANDALWAYSBEWARE
OFTHEIRBREATHINGMIXTURE.
NEVERBREATHEONTHEGEMLOOPWHILEONTHESURFACEORINTHETOP20FOOTRANGE!!DIVERSSHOULD
BEONOPENCIRCUITOROPENLOOPONLY!!!
6. On descending from the surface to 20 feet, the diver should be using either open circuit or the GEM in open cir-
cuit mode; this is also known as open loop. While descending, the diver should exhale out of his nose, and inhale
triggering the T-piece second stage or pushing on the T-piece second stage to manually add gas. The PPO2 moni-
tor or computer should be watched continuously during this phase of the descent.
7. On Ascending from 20 feet to the surface, the diver should use either open circuit or dive the GEM in open circuit
mode/open loop and also monitor the PPO2 monitor or computer continuously.
8.Divers should be careful to not become complacent in monitoring the gas percentage in their breathing loop. It
should be a habit to check the GEM display frequently, especially in shallow water. This means checking it once
per minute. Divers may become comfortable using a high mixture such as 36%; then when they decide to do a
dive using a lower percentage such as 32%, may forget to monitor the gauge as often as they should. ITISIM-
PORTANTTHATGOODHABITSAREFORMEDANDTHATATALLTIMESWHENBREATHINGONTHEGEMWHILE
INSHALLOWWATER,THEPPO2MONITORORCOMPUTERMUSTBECONTINIOUSLYMONITORED.IFDIVING
OPENLOOP,FROMTHESURFACETOADEPTHOF20FEET,THEBREATHINGGASDISPLAYSHOULDBEMONI-
TOREDCONTINOUSLY.ATDEPTHITSHOULDBECHECKEDEVERY1MINUTE!
9.Divers using lower percentages of nitrox, will find that their PPO2/FiO2 percentages could fall into dangerous
zones while either in shallow water or on the surface. ITISESSENTIALTHATDIVERSDONOTBREATHONTHE
GEMWHILEONTHESURFACE.IFDIVERSNEEDTOSPENDTIMEATTHESURFACE,EITHERSWIMMING,WALK-
INGTOTHEWATERORWAITING,ANDTHEYREQUIREASCUBASYSTEMTOBREATHEFROM,THEYSHOULD
BEBREATHINGONTHEIROPENCIRCUITREGULATOR.WHENTHEYAREREADYTOSTARTTHEDIVE,THEY
MAYSWITCHTOBREATHINGOPENLOOPONTHEGEMDIVINGSYSTEM,MONITORINGCONTINIOUSLYWHILE
DESCENDINGTHROUGHTHESHALLOWWATERRANGE.ALTERNATIVELY,THEDIVERMAYUSEOPENCIRCUIT
INTHETOP20FOOTRANGEANDSWITCHTOTHEGEMDIVINGSYSTEMONCEPAST20FEET.THEOPEN
CIRCUITREGULATORISANIMPORTANTPARTOFTHEGEMDIVINGSYSTEMANDSHOULDBEUSEDWHEN
REQUIRED.
10. During the 5 minute pre-breathe, divers must follow the instructions and monitor the PPO2/FiO2 gauge continu-
ously, venting the loop and adding fresh nitrox if the breathing gas percentage falls below air. Depending on the
nitrox mixture in the cylinder, this may need to be done frequently or not at all. As mentioned above, every body
will metabolize oxygen differently.
11.REMEMBER,ITISSTRONGLYRECOMMENDEDTHATGEMDIVERSUSE36%NITROXORHIGHER.LOWERPER-
CENTAGESSHOULDBEUSEDWITHCAUTION!
PATENT PENDING 5 MSL 72.145 Jetsam/GEM R.6
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UNDERSTANDINGTHEKISSGEM-IMPORTANTTOREAD&UNDERSTAND
On the previous information page, you will see many notes and warnings.
As the GEM is so easy to dive, many divers many feel that the warnings are not required. It is important to note that
the KISS GEM diving system is a sophisticated tool; care and attention are essential to divers safety. There are a cou-
ple of important points worth discussing here.
SHALLOWWATER&SWIMMINGPOOLS
In order for the GEM to vent properly, the unit must be submerged in water. If the unit is NOT submerged, it will not
vent properly.
The KISS GEM has a design that allows the system to vent and add gas, as required. This system is designed to vent
a very specific amount of gas. If the GEM does not vent gas, ITWON’TADDFRESHGAS. This means that a diver
standing in a pool or shallow water, with the unit out of water breathing on the GEM, could go hypoxic. Remember,
the diver is rebreathing his exhaled gas and is using up the oxygen in the breathing loop. With each breath the diver
takes, the volume of oxygen in the loop will decrease. With no fresh gas being added, the loop will eventually go hy-
poxic.
As you can see, the venting is key to divers safety.
OTHERGASMIXTURES
You have seen on the previous page that KISS GEM level 1 divers are certified to use between 32% and 40% nitrox.
Those divers that wish to use other mixes, will likely require diving the KISS GEM with a secondary gas. This is why a
KISS GEM level 2 class must be taken.
Those divers that wish to learn basic decompression diving on the KISS GEM, will need to take the level 2 training
class so that they are taught to use a shallow gas (higher amount of oxygen) in conjunction with their standard nitrox
mixture. Of course, this isn’t the only thing that these divers must learn to do decompression diving.
Those divers that wish to learn to use gas mixtures with less oxygen, must also take the level 2 training class. They
will be taught to use lighter nitrox mixtures. These divers will also need to use a secondary gas mixture which has a
higher amount of oxygen.
It is essential that divers understand that using nitrox mixtures of less then 32% greatly increases the risk of hypoxia
in shallow water and on ascents.
AKISSGEMdiverusingairCANNOTmake a direct ascent to the surface. As the diver ascends, the gas will vent
from the GEM diving system 2 ways; by the discharge ports on the mouthpiece and also by the over pressure valve
on the scrubber head.
It is important to remember that as the diver goes up the gas in the diving system will expand (even though the unit
is venting), thus providing the diver with an adequate amount of gas to breathe. As the breathing loop is full of gas,
the T-piece second stage MAYNOTadd fresh gas. As explained above, if fresh gas is not being added to the diving
system, the amount of oxygen in the loop will decrease with every breath, which will eventually cause the gas in the
loop to become hypoxic.
The GEM gas addition works just like an open circuit regulator. When the diver inhales, the change of pressure trig-
gers the regulator to add gas. On the GEM, the diver inhales the gas from the breathing loop, then as the lungs go flat
and there is no more gas to inhale, the positive pressure on the lungs causes the T-piece second stage to add fresh
gas.
What does this all mean?
• Recreational level 1 GEM divers just need to remember that their gas mixtures are between 32% and 40%, and we
recommend 36% or higher.
• Technical divers need to take the level 2 training class .
KISS GEM diving is easy, fun and safe. GEM gives divers 3 times the amount of gas to breathe, in a light weight, port-
able system. The rules for GEM diving are no more difficult then those for open circuit diving, just different.
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6
KISS
GEM
FINALLY, THE BENEFITS OF DIVING A REBREATHER IN A LIGHT WEIGHT,
ECONOMICAL, EASY TO USE GAS EXTENDING SYSTEM!
TheGEMsystemisthelatestadditiontotheKISSrebreatherfamily.TheGEM,likeallKISSsystems,is
DURABLE,
RELIABLE,EASYTOUSE,
&
ECONOMICAL.
The KISS GEM, as the name implies - Gas Extending Mechanism - is a simple system that extends the time
your gas will last underwater. The GEM system will allow the gas in your cylinder to last
THREETIMESAS
LONG!
The GEM utilizes a nitrox mixture, allowing you to experience the benefits of diving enriched air nitrox. Other
benefits that GEM diving offers include the exceptionally small size, the light weight, fewer parts and complex-
ity then diving a fully closed rebreather. Yet GEM still provides the same benefits that rebreather diving offers;
warm moist air to breath, no noisy rush of bubbles to scare fish away, and the benefits of diving enriched air.
TABLE OF CONTENTS
GEMpartslist Page7
ReceivingyourGEM Page8
Canister&scrubberhead Page8
Canisterloading Page10
Wing/harness system & counterlung cover adjustment and placing Page 11
GEM mounting system Page 13
Loop hoses, T-pieces, & quick disconnect system Page 14
Counterlungs & counterlung covers Page 15
Lungvolumetroubleshooting Page16
Mouthpiece Page18
Positive&Negativetesting Page20
T-piece2ndstageuse Page22
Sensorinformation Page23
Sensor installation & display attachment Page 24
GEMwristdisplay Page25
GEM wrist display - battery warning Page 27
GEM wrist display - changing the battery Page 28
GEM wrist display - trouble shooting Page 30
CareforFischerconnectors Page31
Shearwater GEM diving computer Page 32
DivingtheKISSGEM Page34
Predivechecklist Page36
Post dive check list - disassembly of GEM Page 39
Training Page40
Minimum training standards Page 41
Duration Page43
Recommendedspareparts Page44
Servicing / installation of spare parts Page 45
Exhaust valve, T-piece second stage, work of breathing troubleshooting Page 46
Warranty Page48
Front and back cover photos by Alan Studley
PATENT PENDING 7 MSL 72.145 Jetsam/GEM R.6
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GEMSPECIFICATIONS&PARTSLIST
Congratulations on purchasing the KISS GEM. This is a system for divers who want the luxury of having their breath-
ing gas last three times as long!
This system is for recreational divers who wish to extend their gas, experience the benefits of rebreather diving, yet
keep the system easy to use and economical.
• Weight of the KISS GEM, including the canister, base cross piece, mouthpiece, all loop hoses and T-pieces, counterlungs,
counterlung covers, wing/harness, mounting system is, 18 pounds / 8 kg. Without the wing/harness system it is 13
pounds / 5.9 kg.
• Height of the canister to the top of the hose attachment towers is approximately 13.5 inches / 34.3 cm. The diameter of
the canister is approximately 5.5 inches / 14 cm, not including the cylinder mount.
• The wing & harness system, including the crotch strap weighs approximately 4.9 pounds / 2.2 kg. This system is designed
to fold down to a very small package!
PARTSINCLUDED:
• 1 GEM scrubber head includes, 2 hose attachment towers, 1 exhaust valve, gasket & cir clip, O-ring.
• 1 GEM canister. Includes threaded tube, base, internal base cross support.
• 1 cylinder attachment system. Includes GEM mount with 2 SS hose clamps attached to canister, & cylinder mounting sys-
tem attached to cam strap on wing.
• 1 17” standard loop hose. This hose will be attached to the right hand/2nd stage regulator T piece with counterlung ring
attached. Opposing end will have a quick disconnect hose stub attached.
• 1 22” standard loop hose. This hose will be attached to the left hand/Display T piece with counterlung ring attached. Op-
posing end will have a quick disconnect hose stub attached.
• 2 GEM specific 17” loop hoses. These will have the mouthpiece hose attachments on one end and a quick disconnect hose
stub on the other. 3 ballast rings will be installed on each hose.
• Sensor housing with single display. OR, Fischer cable attached to sensor housing for use with GEM computer.
• 1 sensor housing O-ring. This will be packaged inside the scrubber canister.
• 2 counterlungs with counterlung covers and adjustment straps. Counterlungs will be inserted in the covers.
• 1 mouthpiece (DSV)
• 2 black cir clips for securing the hose attachments to the mouthpiece. Cir clips will be packaged inside the scrubber canis-
ter.
• 1 wing/harness system. Includes, 35 lb back inflate wing, webbing harness, crotch strap, 2 cam straps, inflator. GEM mount-
ing system will be attached to the cam strap. (Wing/harness/crotch strap is an optional item)
• 1 LP regulator hose (t-piece second stage to your first stage)
• 1 2nd stage regulator necklace. This is for your bailout regulator. This will be packaged in the scrubber canister.
• 1 CD with manual. This will be in your envelope with your warranty card.
EXTRAS
• Quick Disconnect for T-piece second stage to LP hose. If ordered at the time of purchasing GEM, it will be installed on your
unit.
• HP/LP swivel elbows
• Spare parts &/or spare parts kit. See back of manual for details.
ADDITIONAL REQUIRED GEAR
• Personal gear: mask, snorkel, fins, boots, gloves
• Weight belt
• Exposure suit
• First stage with pressure & depth gauge, 2nd stage
• Computer (optional)
• 1 sensor for the display system. Analytical Industries (AI) PSR-11-39-MD or Maxtec inc., Max - 305.
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8
RECEIVINGYOURGEM&CONFIGURATION
Your new KISS GEM diving system will be shipped directly to your dealer. For those that will take delivery of the GEM
themselves and have not yet been certified, certain components &/or the mouthpiece will need to be shipped sepa-
rately to your instructor. This may mean a higher shipping charge. This ensures that no diving will take place prior to
the proper training being received.
First, unpack your GEM and using the parts list on page 7, ensure that all components have been received and there
hasn’t been any shipping damage. If anything seems to be damaged from shipping, please contact either your dealer
or the Jetsam offices in a timely fashion so that we may replace your damaged parts.
The KISS GEM diving system you have purchased is for recreational diving and should be configured as instructed in
this manual.
SCRUBBERHEAD
You will receive your scrubber head with the hose attachment towers and Apeks exhaust -
Over Pressure Valve (OPV) already attached to the scrubber head. The O-rings have been
installed. The towers have been factory installed and do not require divers to remove them.
On the inside of the head, you will see the rubber gasket which has been installed and secured with a cir clip. The
gasket has been factory installed and will not require divers to remove it.
The scrubber head O-ring has been installed for you. See the photo right for location. Apply
lubricant to the installed O-ring.
The exhale tower is the tower in which dives will see the air passage tube and it will have an
“X” engraved beside it. The inhale tower is the tower in which the diver will see the grey
baffle and it will have an “I” engraved beside it.
Your scrubber head is now prepared. Prior to diving, divers should ensure that the O-ring is
clean and lubricated; that the gasket is in good condition; the OPV is tightened all the way
down; the towers are not damaged.
SCRUBBERHEADO-RING:
The O-ring in the scrubber head was changed to a slightly larger one. The original O-ring required proper attention to
ensure that it was properly seated and adequately lubricated prior to every dive. The new O-ring, as it is larger, fits
much snugger into the groove which makes it unlikely to dislodge.
Installation of this O-ring requires using the procedure described below. As you will notice, it will seem that the O-
ring is too large for the groove. This is why it is important that the procedure below be followed.
To install this O-ring, first ensure that the O-ring groove is clean of any debris and then apply silicone grease to the
groove. Also lubricate the O-ring well. We have found that using a standard silicone lubricant works best.
Push the O-ring into the groove; you will wind up with a portion looped up and out of the groove. Once you get to
this point ensure that your fingers don’t have an excess amount of lubricant on them. Then grasp the loop at the top
- right area and holding it firmly, push it to the left, into its self. You will see that the loop will slowly start to get
smaller. When the loop is substantially decreased, the O-ring will snap into the groove. This is very easy to do.
*WARNING:TheOPVwhichispartoftheGEMdivingsystemisrequiredtoassistinventingthesystemonas-
cent.ItisNOTforthesolepurposeofventingforyouwhilediving.TheGEMdivingsystemshouldbedovewith
theOPVinafullyclosedposition.Ifitisnotfullyclosed,youmaybeventingduringthedivewhenyoushould-
n’tbe;thiswillcauseyoutouseanexcessamountofgas!
PATENT PENDING 9 MSL 72.145 Jetsam/GEM R.6
9
CANISTER&BASE
You will receive the canister already threaded onto the scrubber base. This is a factory install and divers are not re-
quired to remove it.
Servicing the scrubber base and scrubber base O-ring should only be attempted by a qualified GEM service technician.
Empty all items out of the canister and set aside. The only component that is
required for the canister is the base cross support. The cross support sits in the
center bottom of the canister. See photo to the right. Attached to the canister
will be the cylinder mounting system. Please see page 12 for instructions of use.
*WARNING:TheKISSGEMcanister&headisakeycomponenttothedivingsystem.Propercareandmainte-
nanceshouldbetakenwithregardstothisitem.Itshouldbeinspectedandservicedannually.Therubberhead
gasketshouldonlybeservicedbyaqualifiedGEMservicetechnician.Improperuse&/orcaremayresultinseri-
ousinjuryordeath!
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CANISTERLOADING
Canister duration’s are listed on page 39.
To load the GEM canister you will need a Micropore 5” large bore cartridge, part #SR-0801C. Micropore has several
different cartridges available which all have similar part numbers. Please be certain that you use the correct car-
tridge, double checking the part number and ensuring that it is the large bore cartridge prior to use.
*NOTE:ThereismorethenonetypeofMicroporecartridgeforrecreationalre-
breathers.Ensurethatyouareusingthecorrectcartridge!Itmustbethelarge
borecartridge.Ifthecartondoesnotsaylargeboreontheside,donotuseit!
Prepare your scrubber head by ensuring that the gasket is properly inserted and in good
condition. Also, ensure that the scrubber head O-ring is clean and lubricated. The head
should also be clean and ready to dive.
Lubricate the top edge and the outer side of the canister. This is a sealing surface and
requires lubricant. See photo to the right.
Open the container that holds the cartridge and slide the cartridge out and remove it
from the plastic bag. Once out of the packaging, handle it only by the sides.
*WARNING:Becertaintoonlyholdthecartridgebythesidesasthetopandbot-
tomendsarecausticandwillburnyourskin!
First push the cartridge into the scrubber head, ensur-
ing that it is inserted all the way. Next push the base
cross piece onto the bottom of the cartridge. Again
ensure that it is inserted all the way. See photos to
the right.
Place the partially assembled cartridge gently into the
canister assembly. The base cross piece will sit on
the nipple which is in the centre of the base. This
placement will allow the canister to spin freely while
the head is tightened. Place the canister on a flat
surface with the mount against a wall. This will en-
sure that the canister sits straight as you secure the
head. Prior to tightening the head, turn it counter
clockwise (left) to ensure that the head settles prop-
erly into position and the threads are lined up. Then tighten the head. As you turn the head you will feel after about
3 turns the O-ring start to engage. After another 1.5 approximate turns, you will
not be able to turn it anymore. It will take approximately 4.5 turns to secure the
head. Ensure that it is properly attached!!
*NOTE:itisimportanttopayattentiontohowdifficultitistotightenthe
head.Asmentioned,youwillfeeltheO-ringengageanditwillbecomemore
difficulttoturnthehead.Ifitissotightthatyouhavetousealotmore
force,backtheheadoff,andchecktheO-ring.Ifitispinched,replaceitasit
willlikelyleadoncepinched.AsyoustartdivingtheGEM,youwillbefamil-
iarwithhowitissupposedtofeel,andifitiseverdifferent,youwillknow
thatsomethinghaschangedandyouneedtoverifythatyourO-ringisok.
WerecommendthatdiverspurchaseasparesetofO-rings.
When the head is tightened all the way, the exhaust valve and inhale tower on
the head will be aligned with the mount, as per the photo to the right.
If you draw an imaginary line from the left side of the inhale tower, it should line up with the right side of the GEM
cylinder attachment. This placement ensures proper hose routing once the canister is attached to the harness.
PATENT PENDING 11 MSL 72.145 Jetsam/GEM R.6
11
WING/HARNESSSYSTEM
The KISS GEM ships complete with wing/harness system. This system is very light weight, and packs well. As it has
a webbing harness, divers of all shapes and sizes will be comfortable using this system. It also ships with an adjust-
able crotch strap.
Webbing harness systems are easy to don and simple to adjust. With this harness system, you simply pull the waist
strap and the shoulder straps will tighten. Slide the crotch strap loop over the waist strap and then secure the waist
buckle.
Some divers may prefer to add a weight belt slide and/or D-ring to each hip. This not only provides a place to clip off
gauges, it ensures that the webbing strap doesn't slide back through the lower slot; it will keep it from unthreading.
When you put the diving system on, you need to be certain that you have cinched your waist strap up properly. If
you leave it loose, the cylinder will sit lower on your back. This will cause the counterlungs and T-pieces to sit higher
then they should and the entire diving system will feel sloppy on the divers back.
The crotch strap that ships with the Jetsam harness system is adjustable. Using an adjustable crotch strap means
that divers may easily adjust it underwater. As described in the next section, having this ability means that divers
can quickly and easily adjust where the counterlung covers sit. It also means that once it has been adjusted, it is
unlikely that divers will need to readjust the system.
Those using a webbing harness for the first time, may find that some adjustment is required for the first dives. This
is normal. It is only through experience that the diver will know exactly where they wish the various D-rings to be
placed.
IMPORTANCEOFCOUNTERLUNGANDT-PIECEPLACEMENT
The T-pieces should be placed either centre chest or slightly above centre chest. (the centre chest is the nipple line)
Having the T pieces placed in this area, ensures that the lower loop hoses are properly situated. This means that
there won’t be excess hose getting in the divers way or loose in the water. The photos below that the hoses curl
nicely when the T-pieces are properly placed. It also ensures that divers will easily be able to see their wrist display
or computer, and be able to find their Wing inflation, pressure gauges and be able to handle the gear properly.
With the T piece situated on the breast, the counterlungs will sit directly over the divers lungs; this position means
the work of breathing will be at its best. For your comfort, we can’t emphasize enough the importance of having the
counterlungs and T-pieces properly placed. While the work of breathing may seem ok if the T-pieces are higher, it
will be much better once they are situated properly on the divers breast. Also, Proper placement is important as the
GEM will not discharge properly if the T-pieces are too high. This will cause the PPO2 to fluctuate; proper placement
means that the PPO2 will be much more stable.
12
12
SECURETHEHARNESSTOTHECYLINDER
Attach the system to your cylinder in the same manner as any buoyancy compensa-
tor. You will notice that your canister attachment mount is already secured to the
lower cam strap. When tightening this strap ensure that the mount is positioned so
that the canister will sit behind your right shoulder. See photo to the right.
SECURETHECOUNTERLUNGCOVERS
THEINSTRUCTIONBELOWAREFORDIVER’STHATAREUSINGTHEJETSAMWING/
HARNESSASWELLASFORTHOSEDIVER’SWHOAREUSINGTHEIROWNBOUY-
ANCYCOMPENSATINGSYSTEM.
Divers may use their own BCD or wing/harness system instead of the standard sys-
tem on their new KISS GEM. Those divers that wish to use their own system will need to let either their dealer/
instructor or Jetsam Technologies head office know; we will need to ask you a few questions about your buoyancy
compensating system in order to ensure suitability. Almost all systems will work.
The main anchor point is where the counterlung covers are secured to the divers waist strap. The system described
below is different from the original mounting system. This system is easier to use and adjust, as well as being easier
to don and doff.
1. Place one of the 2 inch quick links (included in the kit) around the webbing strap on the
BCD/Harness waist band. Position the quick link so that the opening is facing outwards.
On the bottom side of the counterlung cover is a small black plastic D-ring. Put the D-ring
through the quick link on the waist strap and tighten the quick link. This method works
well when attaching the cover to the waist strap which holds the buckle. If the counter-
lung covers need to be removed from the harness/BCD, then simply open the quick link
and release the cover. Tighten the quick link so that it will stay secure to the webbing.
2. For the open end of the waist strap, it may be easier to reverse the above process. First
attach the quick link to the counterlung cover D-ring, and then slide the link onto the open
end of the waist strap; it will be snug. Using this method on the open end of the waist strap will ensure that you
do not lose the quick link if you remove the cover from your harness/BCD.
3.Theabovesystemwillworkformostdiversasitputsthecounterlungcover’sinthecorrectposition,asthe
bottomanchorpointscontroltheplacement.
4. The back of the counterlung covers have a Velcro strap. Secure the Velcro around the webbing on the harness.
Many recreational BCD’s will also have a place to anchor the Velcro; if not, it is not required as the bottom anchor
points will hold the lungs in position.
5. A GEM diving system that uses a technical harness will likely require a crotch strap. An adjustable crotch strap
will provide the diver with the ability to shift the waist strap into different positions, which will then move the
position of the counterlung cover’s. This gives a range of adjustment which provides superior comfort and con-
trol. The adjustable crotch strap is included in the Jetsam wing/harness package. It can also be purchased sepa-
rately for those who have their own BCD system.
6. If a recreational BCD is used, no crotch strap is required as long as the BCD fits the diver properly. However,
should the diver wish to have the ability to shift the covers up or down, an adjustable crotch strap can be added
to most recreational BCD’s.
7. Also for both the recreational BCD and technical harness, adding weight to the pouches on the back of the coun-
terlung covers may also eliminate the need for the adjustable crotch strap. Start with 2 pounds in each pocket
and then transition to 1 pound in each pocket. Diver’s may then choose what amount of weight works best for
them.
WeadviseallnewGEMdiverstostartwithweightinthecounterlungcoverpouches.
8. Using the above method will also make it easier for diver’s to put the GEM unit on and also to remove it, com-
pared to using the v-strap. This method also provides easier adjustment of the counterlung system as the coun-
terlung covers are properly placed from the start. The V-strap was a system used on early GEM units.
9. The straps on the top of the counterlung cover, will need to be secured to the shoulder area of the divers har-
ness. On the top side of the CL cover is a small black plastic D ring. To this D ring a loop of 1” webbing will be
attached that has a cinch adjustment along with a black plastic snap.
PATENT PENDING 13 MSL 72.145 Jetsam/GEM R.6
13
10. If the diver’s harness does not have a D-ring attached below the shoulder or does not have a D-ring in the correct
position, attach a D-ring with a slide to this shoulder area. A set of D-rings and slides is included with the basic
GEM kit.
11. Clip the black plastic snap to the D-ring, while the diver is wearing the GEM diving system. As mentioned above,
the waist strap (and crotch strap for those using it) will place the T piece and counterlung cover in the correct
position and will anchor the lungs and T-piece into place. Now the diver just needs to adjust the top strap so that
most of the slack is taken up; it shouldn’t be too tight
12.Thetopstrapisnotcritical.Itisusefulasitassistsdiversinkeepingtheharnesssystemstablewhile
climbingintothegear.
13.Secure a chest strap. This will prevent the covers from sliding side to side if the diver rotates in a side-ways po-
sition while diving. The chest strap should be located in the centre of the lung cover which will anchor it prop-
erly.
SECURINGTHEMOUNTINGSYSTEM:
It is important that the mounting system is properly located. On the buoyancy compensating system that Jetsam
provides with the GEM, it is positioned on the lower cam strap. While this works on our system, it may not on others.
Some systems have wider spacing on the cam straps and positioning the mount on the lower strap will make the
GEM sit too far down. This will cause pulling on the hoses, pull the T-pieces too high, and stress on the mount. Those
that have the earlier versions, without the locking pin, may find that the GEM can become disconnected from the
mount.
To avoid this problem, the mount may be attached to an individual cam strap, and positioned on the cylinder prior to
the buoyancy compensator being secured. This extra strap works on most BCD’s. However, there are some that it
may not work with.
**WARNING:itisveryimportantthatthecounterlungsandtheGEMcanisterareproperlysecuredandposi-
tioned,tothebuoyancycompensator.DiversmustworkwiththeirGEMinstructortoensurethatthesystemis
properlyrigged.Improperplacementcancauseseriousinjuryordeath!
GEMMOUNTINGSYSTEM
Your KISS GEM is shipped with the cylinder mounting system already attached to the lower CAM strap on your wing/
harness system. The GEM mounting parts have also been attached to the canister.
To use this system, simply push the mating pieces together
where they match up, push the canister into position and let
it slide down to secure. See photos below.
Ensure that the latch is properly positioned and the gem
canister properly secured prior to picking up the cylinder
and diving. Those that have the system with the locking
pin, should ensure that it is properly inserted.
Thosediversthatareusingadifferentwing/harnessorBCDsystem,shouldpayattentiontowheretheyplace
themountingbracket.Onthesystemthatwesell,themountislocatedonthelowerband.Withthissystem,
themountisinthebestpositionifthetopbandisplacedasclosetothetopcurveaspossible.(wherethewrit-
ingisusuallystamped)Thebandsonothersystemsmaynotbespacedthesame.Our
systemhasapproximately6.5inchesinbetweenthebands.
IftheGEMcanisterismountedlow,itwillcausetheloophosestopullandtheT-pieces/
counterlungswillsithigh,causingahighworkofbreathing.IftheGEMcanisterismounted
high,theloophoseswillbeexcessivelylongandcumbersome.Eitherofthesesituations
couldmakedivingtheGEMuncomfortable.
Forbestplacement,thestrapwiththemountshouldbeapproximately8.5inchesfromthe
topcurveofthecylinder.Thisismeasuredfromthecurvewherethewritingisusually
stamped,towherethetopedgeofthestrapislocated.Dependingonthesystemthatdi-
verschoosetouse,theidealsolutionmaybetouseadedicatedbandthatisjustformountingtheGEMcanis-
ter.
14
14
LOOPHOSES,T-PIECES&QUICKCONNECTSYSTEM
As mentioned on the parts list, the components have already been assembled.
First attach the right side loop hose to the exhale tower. The right side loop hose is the shorter hose with the second
stage attached. Secure the quick disconnect to the tower which has the “X” on it; lubricate the O-rings on the hose
stub, push into position and then push and turn the ring to tighten.
*NOTE:Asthetolerancesaretightonthesefittings,itisimportantthatthehosestubO-ringsareproperlylubri-
cated!BecertaintoproperlylubricatetheO-ringsonall4GEMhosestubs.Afterattachingthehosestubtothe
towers,takecaretoinspecttheareatobecertainthatnoO-ringswerepinched.
See photos below.
Next attach the left side loop hose to the inhale tower. The left side loop hose is the longer hose. It has the port for
the sensor housing. Secure the quick disconnect to the tower; lubricate the O-rings on the hose stub, push into posi-
tion and then push and turn the ring to tighten. See photos below.
Now the remaining two loop hoses can be attached. These are the hoses with the stainless steel ballast rings. They
will have the quick disconnect hose stubs on one end and the mouthpiece hose attachments on the other. These two
hoses are identical. Attach the quick disconnect hose stubs to the end of each T-Piece. Ensure that the O-rings on
the hose stubs have been lubricated. As per the warning above, ensure that the O-
rings have not been pinched. See photos below.
*WARNING:TheKISSGEMLoophoseassemblieslistedabovearekeycomponentsinthedivingsystem.Proper
careshouldbetakewiththecareandmaintenanceoftheseitems.Annualservicingisrequired.Improperuse
&/orcaremayresultinseriousinjuryordeath!
PATENT PENDING 15 MSL 72.145 Jetsam/GEM R.6
15
COUNTERLUNGS&COUNTERLUNGCOVERS
The KISS GEM ships with 2 four liter size counterlungs. They have been inserted for you into the counterlung covers.
It is simple to remove and replace the counterlungs in the cover. To remove, unzip the top of the cover and remove
the lung. After sanitizing the lungs, they can easily be replaced into the cover. Grasp the bottom tip of the lung, and
push it to the bottom of the cover. Push the threaded opening of the lung, through the hole. If you are having diffi-
culty with this, wet the cover; it will be much easier. Smooth out the lung inside the cover with your hand. After you
close the zipper, to ensure that the lung is sitting properly, you can blow into the open lung hole. This will force the
lung to expand and sit properly. If you notice that it doesn’t expand all the way, open the zipper again and double
check that the lung is sitting properly.
The top of the cover is the end which attaches to the T-piece. When the covers are attached to the harness, ensure
that the bottom end of the cover is pointing down.
The counterlung covers have had bungee attached to the sides, which have been secured to the sides. It is best to
keep the bungee loose, so that it doesn’t restrict breathing.
The counterlungs need to be attached to the T-pieces. A small amount of lubricant may be applied to the inside of
the lung to aid in pushing them into position. See photo below. Lubricant should also be applied to the O-ring on the
counterlung attachment.
Push the lung onto the counterlung attachment, which is located on the under side of the T-piece. The lungs must be
pushed on evenly; do not tilt. Once it has been properly pushed into position, tighten the counterlung ring. See photo
below.
*NOTE:Itisveryimportantthatthecounterlungispushedallthewayintopositionandthentheringproperly
secured.Turntheringuntilnothreadsarevisible.Keepinmindthatitisnotnecessarytoover-tightenthis
ring;thiswouldeventuallycausedamage.
*WARNING:ThecounterlungsareakeycomponentintheKISSGEMdivingsystem.Propercareshouldbetaken
withthecareandmaintenanceofthesecomponents.Theyshouldbeinspectedregularlytoensurethatthey
areinproperworkingorder.Improperuse&/orcaremayresultinseriousinjuryordeath!
There will be a select few number of GEM divers who have a very large lung capacity. If you fall into this category,
you will know this by doing the following test. If while underwater, with the lung covers and T-pieces properly
placed, if the breathing is still difficult, open the zippers on the top of the counterlung covers. If the lung volume is
the problem, opening the zippers should immediately solve this problem and the diver will notice the difference.
Larger lung covers may be ordered, should they be required. If you know that you have a very large lung capacity,
then the KISS GEM may be ordered with the larger lung covers.
16
16
LUNGVOLUMETROUBLESHOOTING
The KISS GEM diving system is a very simple design and easy to use. Pages 11 & 12 outline the reasons for the coun-
terlung placement as well as the rigging instructions. Those instructions should be followed, in order for the diver to
properly learn and understand how the system is supposed to breathe and how to learn about adjustments.
There are several important points to understand:
• It will be impossible to put the KISS GEM on your back, and expect to have the lung volume adjusted correctly at
the start of the first dive. This WILL be a gradual process. Any expectations otherwise will leave divers disap-
pointed and frustrated. If the instructions are followed, then the diver can expect to have their lung volume close
to where they wish it to be, quickly. Remember, this is all about gradual adjustments of the crotch strap and also
the amount of lead in the pockets. Gradual adjustment ensure that the diver properly determines what is best
for them and it ensures that divers truly understand how the system works. Diver’s who dive in a dry suit or are
photographers should recall the time involved to learn the new equipment. Learning to dive a rebreather is no
different; they should expect that there will be an adjustment period.
• It is worth noting that those divers who are certified and experienced with Closed Circuit Rebreathers must un-
derstand that the KISS GEM is NOT a CCR; it is a unique diving system and as such the rules are different then
those for CCR’s. In our experience, some CCR divers first feel that the lower loop hoses are very long and don’t
understand why this is so. Also, that the counterlungs should sit higher. Shorter hoses, improperly placed lungs
and T-Pieces will make for a difficult dive. It is important that experienced CCR divers keep an open mind and
learn to dive the GEM the way it has been designed.
• The T-piece must sit either on the divers centre chest or slightly above centre chest( the nipple line). This posi-
tioning ensures that the GEM will function properly. If the lungs and T-pieces are too high, the work of breathing
will be higher and the GEM’s gas addition systems won’t work properly. Previously we had stated that the lungs
should be positioned by lining up the top of the lung cover with the clavicle bone. We have found this isn’t true
for all body types. As such, it is important that current recommendations are followed.
• As the T-pieces sit on the divers chest, the lower loop hoses need to be long enough to reach from under the T-
Piece and have the mouthpiece reach the divers mouth comfortably, without effecting his ability to turn and
move his head. CCR divers who are accustomed to short loop hoses, must understand that this is not a CCR, but
is new technology that works differently then a CCR. Those of us who are experienced with both CCR and GEM
diving, have found no difficulty in using these longer hoses; it’s just different. See the photo on the bottom of
page 10 to see how the T-pieces are placed and note that the hoses are the perfect length. If the hoses were
shorter, the T-pieces would be forced to sit higher. .
LUNGVOLUMEADJUSTMENTSANDWORKOFBREATHINGTROUBLESHOOTING
TheGEMvolumecontrolsystemiscomprisedof4importantparts:the counterlungs in the counterlung cover, the
bungee on the outer part of the CL cover, the waist strap attachment, and the adjustable crotch strap. These compo-
nents all work in harmony and are an integral part of the gem system. Time will need to be spent with new gem
divers to properly adjust this system. It is important that all new divers understand how the system works and how
they can achieve the appropriate tidal volume for themselves. To troubleshoot the rigging of the GEM system, go
over the points below.
1. Divers will likely attach the GEM wing system to the cylinder, with the top cam strap, at or close to the top curve
of the cylinder. This positioning will assist in the divers not having the cylinder valve push into the back of their
head. As well, it ensures that the GEM mount is properly situated for most divers. Also, divers should avoid using
a DIN first stage with yoke adapter, to a yoke cylinder. This could cause the assembly to be long enough so that
the diver can feel it at the back of their head. Use DIN only or Yoke only.
2. When the diver is wearing the unit and standing up, the lower loop hoses and mouthpiece should be adjusted so
that the mouthpiece rubber mouth-bite is pointing to the ground or slightly forward. This is important as it makes
the loop hoses sit properly underwater and also will prevent any pulling on the mouthpiece. Orientation can be
then adjusted underwater, to the preferred position.
3. Ensure that the counterlung is properly inserted into the cover, and is not restricted.
4. Ensure that the bungee’s on the sides of the cover’s are completely loose. The bungee allows divers to run
gauges beside the counterlung covers to assist in securing them; they should not be used to restrict the size of
the covers.
PATENT PENDING 17 MSL 72.145 Jetsam/GEM R.6
17
5. Ensure that the T-pieces are either at or slightly above centre chest and that the bottom of the counterlung cov-
ers are secured to the waist band of your BCD. If required, use an adjustable crotch strap. Tightening and loos-
ening of the crotch strap, while in the water, will shift the counterlungs up and down. This is the main adjust-
ment and anchor point. We recommend using the adjustable crotch strap. The counterlungs should not be float-
ing up and away from the divers body.
6. To ensure that the T-pieces are properly situated the GEM canister mounting system must not be too low. This
will cause the loop hoses to pull on the T-pieces forcing them too high. Also, the LP regulator hose must not be
too short. 20” or longer is recommended. A short LP hose will also pull the T-piece out of its proper position.
7. Ensure that you put weight into the pockets on the back of the counterlung cover. Adjusting this weight will as-
sist in the counterlung cover placement. This will be very important for divers that do not wish to use a crotch
strap. However, should the diver have difficulty in counterlung cover placement, we recommend that an adjust-
able crotch strap be utilized.
8. Ensure that a chest strap is attached and properly secured. A chest strap will ensure that the T-pieces are se-
cured and properly placed. We recommend this for all divers, however it is especially important for those divers
who have a large chest/torso.
9. If you have an exceptionally large lung volume, then the larger size covers may be required.
While it will take time for new gem divers to gain experience, by the completion of the KISS GEM course the adjust-
ing of lung volume control system will be second nature.
18
18
MOUTHPIECE
You will receive the KISS GEM mouthpiece fully assembled, tested and ready to dive. The black plastic cir clips are
used to attach it to the loop hose, hose attachment’s. When you receive your GEM, the cir clips will be stored inside
the scrubber canister. The mouthpiece will be packed in the box beside the unit and loop hoses. For those who are
taking delivery of the GEM and do not have training, parts of the unit and/or mouthpiece may be sent to your GEM
instructor so that the unit can not be dove prior to training.
To attach the mouthpiece to the loop hoses, push the hose end with the hose attachment onto the mouthpiece. Be
certain to lubricate the O-rings well first. Use standard silicone grease for these O-rings as it works better. The toler-
ances are tight between the hose attachments and the mouthpiece ends. Be certain that the hose attachment
pushes all the way to the mouthpiece, so that the cir clip goes in smoothly. See photo below. Inspect to be certain
that no O-rings were pinched. (the mouthpiece should be placed so that the diver sees the white arrow when wear-
ing the unit. The mushroom valve is on the left and the moving piston valve is on the right.)
Once attached, insert the cir clip into the slots to secure. See photo below.
The mouthpiece is the key to the GEM diving system. The design allows gas to be eliminated from the breathing loop
every time you exhale. Whether you are relaxed and not breathing hard, or you have a high work load, you will al-
ways vent the same percentage.
When the GEM mouthpiece discharges the gas, small stream’s of bubbles will vent. These bubbles will come from the
discharge ports on the mouthpiece. As the diver can see the bubbles, it will be immediately obvious if there is a prob-
lem and no bubbles are venting. If this happens, the diver should also notice that the T piece second stage is not add-
ing gas. It won't add gas, as the volume in the system has not been depleted.
*WARNING:ifthemouthpieceisnotventing,thegasmixtureyouarebreathingcoulddroptoadangerouslevel.
Thiscouldcauseinjuryordeath,especiallyatshallowerdepths!!
Prior to diving, divers should visually check the left side, or inhale mushroom valve and ensure that it is laying prop-
erly and not damaged. Divers should also gently shake the mouthpiece to ensure that they hear/feel the right side
valve components moving freely back and forth. These parts must move freely for the mouthpiece to work properly.
If they don’t move freely the mouthpiece must be serviced. Having the mouthpiece serviced by a trained GEM service
technician is important. If the servicing of the valve is not done properly, and lubricant is applied to the wrong parts,
the valve will stick and not work!! Lubricant in the right side valve area, will cause the inner valve to stick either
open or closed.
If the right side one way valve sticks open, you will notice excess bubbles venting from the mouthpiece. The unit
should not be dove in this manner as the gas is not flowing properly and could cause a problem with carbon dioxide.
If the valve sticks closed, it would be difficult to exhale. A sharp exhale would dislodge it, but the proper action would
be to end the dive and service the mouthpiece.
*WARNING:Ifthemouthpiecerightsidevalveissticking,donotdivetherebreather;havethemouthpiece
servedfirst!DivingtheGEMwithamouthpiecethatisnotfunctioningproperlycouldcauseinjuryordeath!
On the ascent to the surface at 20 feet, divers should switch from GEM diving to GEM open loop diving or open cir-
cuit. Your instructor will teach you about open loop diving.
Also, on descent from the surface to 20 feet, divers should dive the GEM in either open loop diving or open circuit.
PATENT PENDING 19 MSL 72.145 Jetsam/GEM R.6
19
*WARNING:Beawarethateventhoughyouhaveanoverpressurerelief-exhaustvalveonyourcanister,itcan
notbesolelyreliedupontorelieveexcessloopvolumeonarapidascent.Iftheascentisrapidorun-natural,
thediveronthebreathingsystemwillfeelresistance;liketheyareblowingupaballoon.Exhalingoutofyour
nosewillhelptorelievethepressure.
*WARNING:ServicingoftheGEMmouthpieceshouldonlybeattemptedbyaqualifiedGEMservicetechnician.
Donotattemptservicingthemouthpiecewithoutthepropertraining!!!
Purging the mouthpiece
During your training you will be required to close the mouthpiece and switch to your bailout regulator. When you are
ready to go back on the breathing loop, you will need to purge the GEM mouthpiece prior to pushing the lever open.
To do this, put the GEM mouthpiece in your mouth and exhale hard. You will push the water out of the vent hole.
You only need to do this for seconds as it is a minute amount of water. Once you see bubbles, the water is gone.
After purging push the lever to the open position and then you may continue to breath on the loop.
While doing the above exercise, be certain to not cover the vent hole with your hand as you move the lever. Cover-
ing the vent hole with your hand will prevent it from purging the water.
Diaphragm’s & Buttons
The KISS GEM mouthpiece has 3 discharge port diaphragms and buttons. Since the GEM has been released, there
have been some modifications to both the diaphragms and the buttons. Information on these changes was sent to
the KISS dealers when they occurred.
The most current diaphragm style is the one that is grey. The originals were black. If you are still using the black
ones, It is highly recommended that you upgrade to the newer version. The new ones, are a different material then
the original and are not likely to hold a memory. The original ones will start to curl. When this happens they would
need to be replaced before diving. Diaphragms can be replaced by contacting head office or your dealer.
The current button style will ensure that the diaphragm is both protected from being brushed off,
yet still allows free movement and visual inspection of the diaphragm. See photo to the right. As
with the diaphragms, it is recommended that this version of the button be used.
Diaphragms and buttons should be visually inspected prior to every dive to ensure that the dia-
phragms are sitting flat, and properly placed.
*WARNING:TheKISSGEMmouthpieceisakeycomponenttothisdivingsystem.Propercareandservicingis
essentialinordertomaintainproperworkingorder.Keyareasofimportanceinclude,butarenotlimitedto,
ensuringthepistonismovingproperly,themushroomvalveisworkingasitshould,andthedischargeportdia-
phragmsaresittingflatandnotdamaged.Improperuse&/orcaremayresultinseriousinjuryordeath!
20
20
POSITIVE&NEGATIVETESTING
Mouthpiece positive & negative testing
It is essential that prior to every dive, a mouthpiece positive and negative test must be performed, along with a good
visual inspection of the mushroom valve. The instructions for this procedure are as follows:
1. Visually inspect the mouthpiece. Ensure that the mushroom valve is undamaged and in good condition. Insure
that the left side Valve Disk is sitting properly and that you feel the right side valve assembly move freely.
*WARNING:Thevisualinspectionisanimportantpartofthistesting;becertaintotakeyourtimewhendoing
thistoensurethemushroomvalveisnotdamaged!Failuretoinspectthemushroomvalvecancauseserious
injuryordeath!
2. Attach the lower loop hoses to each side of the mouthpiece and put the mouthpiece in the closed position.
3. Blow into the left side loop hose, while holding the right side loop hose to your cheek. You should feel the air
move freely through the mouthpiece and against your skin as it exits the right side hose.
4. Suck gently on the same left side hose. You should feel the Valve Disk seal against the Valve Plate. Do not suck
hard. It is not necessary and could damage the valve. These valves are expensive; take care of them. You should
feel the valve seal. If there is a slight leak, rinse the mouthpiece in fresh water. Excess saliva or sea water in
this area (from a previous dive) can cause the valve to leak. Rinsing will solve this problem.
5. Suck on the right side loop hose and place the left side hose against your cheek. You should feel the valve as-
sembly move and allow the air to move through the mouthpiece.
6. Blow in the right side loop hose. You should feel the valve assembly seal and no air should pass through.
It is important that the mouthpiece lever is in the closed position for the above tests. If left in the open position, the
discharge ports will vent and the testing will fail.
KISS GEM full positive & negative testing
It is essential that any time your KISS GEM diving system is disassembled, for any reason, that full positive and nega-
tive tests are conducted prior to diving. This means that anytime you assemble the unit with fresh absorbent, a posi-
tive and negative test is done. It also means that any time you remove any single component from the diving sys-
tem, that full positive and negative tests are done again. If you break the seal, test the unit! The instructions for
these procedures are as follows:
1. Assemble your KISS GEM diving system as per the instructions.
2. Place the diving system on a table or chair; the loop hoses should be hanging freely.
3. Place the mouthpiece in your mouth with the lever in the open position, and inhale. You want to create a nega-
tive vacuum in the loop. Draw all the gas out of the loop, until you can not inhale any further, and close the
mouthpiece. It should be noted that it is not necessary to inhale so hard that you feel pressure building in the
back of your throat, or that your face turns red. This is too hard and could damage the valve disks!
4. Once you have closed the mouthpiece, watch the counterlungs and the bottom of the loop hoses close to where
they attach to the hose attachments. If there is a leak, the counterlungs will shift, as will the loop hoses.
5. After about 1 minute, open the mouthpiece. You will hear the sound of the gas moving in the diving system. This
is important.
6. Place the mouthpiece back in your mouth and exhale into it. Exhale until you see/feel the counterlungs are full
and then close the mouthpiece, while still exhaling. As you are exhaling, you will feel the discharge ports vent.
This is normal. Once the lever is in the closed position, the venting will stop.
7. Once you have closed the mouthpiece, watch the counterlungs. If there is a leak, they will shift.
8. After about 1 minute, open the mouthpiece. You will hear the sound of the gas moving in the diving system. This
is important.
*NOTE:Whendoingyourtest,itisVERYimportanttonotsucksohardthatyouaredamagingthemushroom
valve.Whenyoudothenegativetest,suckuntilyougetagoodseal,andthenimmediatelycloseoffthe
mouthpiece.Ifyousucksohardthatyoufeelthepressurebuildinginthebackofyourthroat/neckarea,your
earspop,oryoufeelyourfaceturningredforexertion,thisiswaytoohard.Thereisnoneedforthisanditwill
damagethevalve.Suckjustuntilyoufeelthatpressure,thenclosethevalve.
Table of contents
Other KiSS Diving Instrument manuals
