Nellis Engineering Logic Genesis 2.0 User manual

Genesis Manual Rev2.0 Copyright 2020, Nellis Engineering, Inc.
Genesis
GenesisGenesis
Genesis 2.o
Diver Propulsion Vehicle (DPV)
Owner's manual

Genesis Manual Rev2.0 Copyright 2020, Nellis Engineering, Inc.
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Preface:
IT IS IMPERATIVE TO READ AND UNDERSTAND THIS MANUAL so that you know the
capabi ities, imitations and hazards of the Genesis DPV. Reread it occasiona y to
refresh yourse f with the operationa and maintenance requirements and refresh
yourse f on the proper responses shou d you experience difficu ties with the DPV
underwater or on and. By not fu y reading and understanding this manua , you
wou d be eaving essentia safety information out of the water, which is no different
than eaving essentia dive safety equipment on the shore, where it wi do you no
good when you need it most. If you have any question, contact the factory for
guidance.
Table of contents Page
Warnings & Cautions 3
Assemb y 5
Charging the Battery 7
Tow Cord 8
Trimming 9
Operation 9
Post Dive 11
Care & Maintenance 12
Vacuum & Pressure Testing 13
Power charts (P anning) 14
Warranty 16
Changes to the manual
Changes to the manua from the previous revision can be identified by a vertica b ack bar in the
right margin where the change occurs.

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Warnings & Cautions
WARNING
A warning means that injury or death is possib e
if the instructions are not obeyed.
CAUTION
A caution means that damage
to equipment is possib e.
Note
A note is added to give more
information, usua y in a procedure.
WARNING: Keep hands, ong hair and equipment away from prope er. The prope er spinning at
high power settings creates significant suction within 16 inches (40 cm) of the nozz e in et and can
draw in hands, hair or anything within range. The DPV is equipped with safety features that wi
stop the prope er rotation when enough resistance is present, but injury is sti possib e.
WARNING: A ways rotate the trigger ock tab to b ock trigger operation AND adjust the speed
contro ever to OFF when not in use to avoid accidenta operation.
WARNING: Never a ow the battery to charge unattended or attempt to charge a damaged
battery. The Lithium Ion battery has a high energy density and can catch fire or exp ode if
incorrect y wired, abused or damaged. On y recharge in a safe ocation, free of f ammab e
materia s, under direct supervision and on y using the supp ied charger. Do not attempt to charge
the battery immediate y after fu y discharging at high power. The battery wi heat up the most
during the end of a deep discharge and shou d be a owed to coo for one hour before
recharging. For the best battery ife, avoid deep y discharging the battery, if possib e.
WARNING: Do not eave the DPV battery (a one or insta ed in DPV) in direct sun ight or a hot car.
Temperatures of 140°F (60°C) or above can damage the battery, resu ting in fire or exp osion.
Interna temperatures of a car in the sun can easi y exceed 140°F (60°C)
WARNING: Do not attempt to charge the battery when they are at or be ow freezing
(32°F/0°C). Permanent damage to the batteries wi resu t, decreasing both battery safety and
capacity. Whi e the outside of the DPV may be above freezing, the battery may not. Ensure amp e
time is spent in a warm environment for therma equi ibrium across the pack before charging,
fo owing exposure to freezing temperatures.

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WARNING: Do not use the DPV to ascend from depth. Having the scooter tow you towards the
surface from depth can resu t in a rapid ascent which can resu t in ear drum rupture, ung over
expansion, decompression i ness or death. Do not operate any DPV without proper training.
WARNING: Do not re y on the DPV to save your ife. The DPV is capab e of taking you p aces that
you may not be ab e to swim back from if the DPV fai s. It is not and was never intended to be ife
support equipment, so do not re y on it as such.
WARNING: Be prepared to separate yourse f from the DPV shou d it become uncontro ab e, a
dangerous restriction to movement or extreme y negative y buoyant from f ooding.
WARNING: The DPV is capab e of compensating for diver buoyancy trim changes with itt e
indication of the change in buoyancy detectab e by the diver unti they stop. Operating the DPV
over varying depths can resu t in the diver becoming very positive y or negative y buoyant when
they stop, resu ting in an out of contro ascent or descent. Ensure proper trim adjustments are
made when changing depths whi e scootering and be prepared for this when stopping.
WARNING: Powerfu magnets are used in the magnetic coup ing for the prope er. When the
prope er assemb y is removed from the tai section, it can be attracted to magnetic surfaces with
great force. Treat the prope er assemb y with extreme caution when removed to avoid pinching
hands and fingers and a so damaging the coup ing.
CAUTION: Avoid running the DPV unti battery cutout. Deep y discharging the battery shortens
the battery ife and can ead to over-discharge of the battery. Shou d the DPV be run unti cutout,
remove the recharge p ug cover on the nose of the DPV after exiting the water and recharge the
battery at your ear iest opportunity.
CAUTION: Ensure the DPV recharge connector cover is insta ed prior to entering the
water. Corrosion of the connector can occur if eft off for extended periods in the water.
CAUTION: The prope er is capab e of ingesting rocks off the bottom, sea ife and other objects at
high power settings, which can damage the prope er. Use caution when operating near oose
objects and dive responsib y near sea ife.
CAUTION: A ways inspect the o-ring grooves and sea ing surfaces for dirt, sand or debris and
remove if present to ensure a good sea . Check that the o-rings between the body and tai section
are c ean, undamaged and ubricated when assemb ing the DPV. Ensure the body/tai connection
is proper y a igned before engaging the sea s and do not force the connection together if abnorma
resistance is fe t. Poor attention to assemb y can resu t in damage to the sea ing surfaces and
f ooding of the DPV.
A ways remember to remove the recharge p ug cover when not
in use or the batteries may be permanent y damaged by over
discharge. Over discharge is not covered by the warranty!

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Assembly
Before diving the DPV for the first time, the
body of the DPV must be connected to the
tai section. Review the War Core User
Manual to ensure the battery is proper y
assemb ed. Lower the battery into the DPV
body with the cab e from the nose of the
DPV body on the side of the battery with
the Charge Contro circuit board. Stop 3 to
4 inches before the tube opening and
connect the cab e to the white 4 pin
connector (Figure 1). Rotate the 2 b ack
ocking bars c ear of the notches in the red
a uminum p ate (Figure 2) and finish
owering the battery into the DPV body so
the gray bars a ign with the notches in the
red p ate of the battery. Rotate the b ack
ock bars into the s ot in the gray bars to
ock the battery in p ace and insta the two
red thumb screws finger tight (Figure 3) .
Figure 1
THUMB SCREWS
Figure 3
LOCK BARS
Figure 2
CABLE
FROM DPV
NOSE

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Ensure the two o-rings on the tai are c ean
and generous y greased with Mo ykote 111
si icone ubricant. Insufficient grease or
debris on the sea ing surfaces can resu t in
f ooding of the scooter. (Never grease the
grooves used by the ock strips.) Ensure the
nose p ug cover is not insta ed, the trigger
is ocked OFF with the tab behind the
trigger (Figure 4) to prevent operation and
the speed ever is rotated down to the OFF
position before connecting the battery.
Stand the DPV body on the nose, connect
the battery to the tai /motor of the DPV and
gent y p ace the tai onto the body, ensuring
wires are not pinched. Ensure that the gap
between the tai and body is equa a the
way around and the tai is proper y a igned
to the body. Position the nozz e struts at
the 3 and 9 o’c ock, direct y above the s ot
in the body for the ocking strips (Figure 5).
Press the tai straight down into the body
tube and ho d it down whi e insta ing the
orange ock strips. A s ight pressure is
created inside the DPV by this, which is why
the tai must be pushed down onto the
body when opening and c osing. S ide the
arge rubber band rearward to cover the
two s ots and joint between the tai and
body, a the way around. This is to keep
sediment out of the sea area.
Note
The rubber band is not needed to retain the
ocking strips or sea the DPV. It is there
so e y to keep sand, si t or other debris out
of the joint, which may get into the o-ring
groove when the DPV is opened. At the end
of the diving day, the rubber band shou d
be s id forward so fresh water can f ow
around the joint when it is rinsed and eft
c ear of the joint unti the next dive, so
water can drain/dry out.
Figure 5
T
AB BEH
IND TRIGGER
SPEED LEVER
DOWN (OFF)
Figure 4 – Trigger Locked OFF

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Note
It is possib e to have a s ight vacuum or
pressure inside the DPV body from changes in
a titude or atmospheric that prevents the tai
section from being removed. A test port p ug
(Figure 6) on the nose of the DPV can be
removed with an 11/16" socket to equa ize
the pressure. This is the pressure/vacuum
test port that wi be discussed ater.
The recharge p ug cover on the nose of the DPV shou d on y be insta ed when you are ready to
dive. It contains a circuit that enab es the motor contro er and shou d be thought of as an ignition
key for an automobi e. When the p ug cover is insta ed, the batteries wi begin discharging s ow y.
Do not leave the lug cover installed when storing the DPV, or the batteries may be damaged by
over discharge! Remove the p ug cover at the end of the diving day or after exiting the water, if
the DPV is run unti battery cutout. The recharge p ug cover is rather expensive, so do not ose it.
If you do ose it or forget it before a dive, the DPV can sti be used. The water wi comp ete the
circuit to enab e the motor contro er, but doing this regu ar y/ ong term wi eventua y ead to
corrosion on the e ectrica pins.
Before entering the water, insta the recharge p ug cover and test that the DPV operates norma y
by depressing the trigger and operating the variab e speed up and down with the prope er speed
tracking the commanded speed. A ways ock the trigger OFF and adjust the speed ever to OFF
whi e entering and exiting the water.
Charging the Battery
On y recharge the battery in a safe ocation where it can be monitored. Do not charge the DPV
unattended. The ithium ion batteries do not off gas whi e charging, so the DPV body can remain
sea ed during charging. Obey a warnings and cautions previous y isted on pages 3 & 4.
P ug the charger into the DPV first and then p ug the charger into the wa out et. The power ight
shou d be on and charging ights shou d change from green to red within one minute, indicating
that the batteries are charging. At the end of charging, the CHARGING LED wi turn green.
The Genesis batteries shou d on y be charged when you intend to use the DPV. Charge them 12 to
24 hours before you p an to dive. When storing the DPV for more than a few days, the batteries
Figure 6

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shou d receive a partia charge to bring the vo tage into the storage range of 62V to 67V if the
vo tage is ower. Under norma operation, it is recommended to p an your dives so that the
batteries are on y discharged about 80% of the avai ab e capacity, to avoid deep cyc ing the ce s,
which decreases their service ife. Battery vo tage can be checked via the B uetooth phone app or
the Sentry DPV Dashboard wi read the battery vo tage whi e charging, if insta ed.
The charger output is approximate y 275Watts. This means that during the bu k charge period
(first 90% of capacity), the 2.1 battery wi increase about 30% of the tota capacity per hour up to
approximate y 90% and the 2.2 batteries wi increase about 15% per hour, up to approximate y
90%. During the ast 10% of the charge, the current decreases as it approaches fu charge and the
fina 10% of charge takes approximate y 1.5 and 3.0 hours to finish, respective y. As an examp e
for the Genesis 2.1, if during a dive, you used 50% of the battery capacity and then recharged it for
one hour during your surface interva , the battery capacity wou d be at approximate y 80% for the
next dive.
Tow Cord
The tow cord comes insta ed between the eft side of the hand e mounting bracket and the nozz e
strut at the 5 o'c ock position when viewed from behind with the hand e horizonta at 12 o'c ock. If
you prefer that the tow cord be mounted between the 3 and 9 o'c ock positions Extra screws are
provided. The proper ength screw MUST be used to ensure the correct thread engagement and
that they are not too ong, so as to damage the nozz e by protruding in to the inner diameter of the
nozz e. Ensure the correct ength screw is used between the nozz e/strut connections. A #10-24 x
7/8 inch thread ength screw is used to attach the struts to the nozz e with no stain ess p ate
insta ed. A #10-24 x 1.0 inch thread ength screw is used where one stain ess p ate is attached. A
#10-24 x 1-1/8 inch thread ength screw is used where two stain ess p ates are attached. Insta ing
too ong of a screw ength wi resu t in the screw piercing the inside diameter of the nozz e and
cracking the materia around where it exits. Torque to 30 in- b.
Figure 7 - Taut line hitch sequence

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Trimming
The DPV shou d be trimmed with weight inside so as to have the proper buoyancy characteristics
in the water. Typica y, DPVs are trimmed neutra to s ight y positive when diving in open water
and neutra when diving in an overhead environment. The amount of weight needed inside wi
change noticeab y from sa twater to fresh water and s ight y from warm to co d water. Two
weight pouches with ead shot are inc uded. Adding items to the DPV ike a compass, camera
mount or bo t-snap on the nose wi affect the trim, so ensure it is configured with a accessories
before trimming.
O eration
A DPV training course is recommended for anyone without experience operating a DPV. The
operation section of the manua in not a substitute for proper training and does not address the
numerous hazards and issues you may encounter whi e operating any DPV.
Once in the water, attach the DPV tow cord to your crotch strap D-ring and adjust the ength to a
comfortab e, but not over extended reach ength. Do not attempt to operate the DPV without it
being secure y attached to a proper towing attachment point on your harness. Do not end it to
another diver without a proper towing attachment point on their harness. When starting out, it is
easiest to start with the tow cord adjusted shorter than necessary and gradua y engthen it,
instead of starting with the tow cord adjusted too ong. The tow cord ength is adjusted via a taut-
ine hitch which ocks up under tension, but can be adjusted by hand when not. (Figure 7)
When you are ready to dive, submerge and
make yourse f neutra y buoyant before
rotating the trigger ock tab 180° out of the
way (Figure 8). Adjust the speed ever to a
midd e position and squeeze the trigger
comp ete y. The DPV has a soft start on the
motor to prevent it from jerking you when
you squeeze the trigger. The speed ever
can be adjusted at anytime, before or after
squeezing the trigger. The tab used to ock
the trigger in the OFF position can a so be
used to ock the trigger in the ON position
(Figure 9) for extended cruising. It is
recommended that you do not use the
ocking tab to keep the trigger ON unti you
have gained amp e experience with the DPV
and then on y use it when your hand is on
the hand e. Rotate the ocking tab out of
the way of the trigger when transitioning
into a restrictive area or area congested
Figure 8 - Lock tab 180° from trigger

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with divers or sea ife. When not using the
DPV, a ways rotate the speed ever to the
OFF position and rotate the ocking tab
under the trigger to prevent accidenta
actuation. (Figure 4)
WARNING
Anytime you remove your hand from the
hand e (to p ace a ree , dep oy a ift bag,
etc.) even if on y for a few seconds, ensure
the trigger is ocked in the OFF position and
the speed ever is set to OFF. A runaway
scooter wi typica y wrap around behind a
diver and spin them in circ es with the
hand e out of reach.
A ways keep hands and equipment away from the prope er in et and exit. Shou d enough
resistance be put on the prope er rotation, the magnetic coup ing wi s ip causing a noticeab e
vibration. Re easing the trigger wi a ow it to recoup e when the motor stops spinning and
operate norma y after the b ades are c eared. No damage or wear wi resu t from the motor
running with the prope er decoup ed. If ine has been ingested and becomes wrapped around the
prope er, remove the prope er assemb y by pu ing it straight out the back of the nozz e.
Underwater, there is more resistance when removing the prope er as the water needs to f ow
into the area of the coup ing as it is removed. It is recommended you practice removing the
prope er underwater a few times in a contro ed situation so you know how much force is
required, before having to do it after the prope er becomes entang ed.
When the battery vo tage drops be ow approximate y 57 vo ts, the battery is down to the fina 10
to 15% of its capacity. At this vo tage, the motor contro er wi imit the scooter's power to
rough y 300 watts, which is about 40 bs of thrust. At this point you shou d be headed back to the
shore or boat. On the Genesis 2.1 you wi have 15-20 minutes of run time at that power and 30-
40 minutes on the 1200. By decreasing you speed on either DPV, you can increase the runtime to
get you back to the shore or boat. It shou d a so be noted that most divers do not use more than
40 bs of thrust in regu ar operation, and you may never notice the reduction in power if you are
a ready operating be ow the reduced power eve . With proper dive p anning, you shou d never be
operating in the ast 10% of the battery capacity.
Whi e scootering around at top speed is fun, it consumes 5-7 times as much power as norma
cruising speeds. Whi e you are earning the performance and runtime characteristics of the
Genesis DPV, it is best to do it in non-cha enging conditions.
Shou d the DPV begin running on its own whi e the trigger is not depressed, the first response
shou d be to turn the speed adjust ever down to the OFF position. If the motor continues to run
and the DPV cannot be contro ed, an option to stop the prope er rotation is to insert a non- ife-
Figure 8 - Trigger Locked ON