© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130115001
19
SuperLite
®
27
®
CAUTION
The fit of the helmet is partially determined
by the adjustment of the neck pad. If the
neck pad is not properly adjusted it may be
very uncomfortable on the diver’s neck. Take
the time to adjust the neck pad properly and
check the fit prior to each dive to ensure the
adjustment has not changed.
2.8.5 Locking Sealed Pull Pins
The special locking sealed pull pins are filled with
silicone fluid that helps to prevent fine sand or mud
from entering the mechanisms and helps to avoid
jamming.
The locking sealed
pull pins can only be
serviced by KMDSI or an
authorized dealer.
DANGER
The locking sealed pull pins must only be re-
paired or overhauled by an authorized KMDSI
dealer or returned directly to KMDSI. This is
not a field serviceable item. Failure to prop-
erly service this pin could result in a failure of
the locking collar latch system, which could
cause the helmet to come off the diver’s head.
This could lead to drowning.
2.8.6 Sealing Arrangement
The neck dam is available in several sizes and is
fabricated in a cone shape. The standard neck dam
on the helmet is made of foam neoprene. Optional
latex neck dams are available.
The neck dam seals against the diver’s neck. The fit
of the neoprene neck dam may be made larger by
trimming 1/4” off the circumference. Only trim a
maximum of 1/4” at a time; trimming too much will
result in a loose fit.
NOTE: If you must trim the neck dam, be care-
ful not to trim off too much material. The neck
dam must fit snugly. While it may be a slight
bit uncomfortable out of the water, and may
feel snug, once in the water the neck dam will
loosen slightly.
WARNING
Pulling the neck dam over the diver’s head
can be difficult. Stretching (expanding) the
seal and placing it part way over the head
can help reduce the force needed to install
the seal. Proper training is necessary to
install the neck seal over the diver’s head
and onto his neck. Although the possibility
is very remote, injury may result if this pro-
cedure is not done properly. If a diver does
not know how to don the neck dam, he must
seek proper instruction before proceeding.
2.8.7 Reducing Carbon Dioxide
It is important to reduce the volume of air/gas space
that the diver is breathing through. Carbon dioxide
(CO
2
) can build up if proper flushing does not occur.
A rubber oral nasal mask is located inside the helmet
to fit over the diver’s nose and mouth. The oral nasal
attaches to the regulator mount nut. This separates
the breathing gas flow from the larger gas space on
the interior of the helmet, and this in turn reduces
carbon dioxide buildup.
WARNING
Always be sure the oral nasal valve is prop-
erly mounted in the oral nasal mask. If the
valve is mounted improperly or is absent this
can lead to a higher CO
2
level inside the hel-
met. A higher CO
2
level can cause dizziness,
nausea, headaches, shortness of breath, or
blackout.
2.8.8 Communications
In the helmet, both earphones and microphone are
wired in parallel to the communications module.
This module allows for rapid replacement of the
entire communications system. The module can be
equipped with either a waterproof connector, or bind-
ing posts for bare wire connection.
Electrical signals are sent to, and received from, the
surface through the umbilical wires. An amplifier
boosts the signals to the desired volume for the sur-
face and the diver.
2.8.9 Equalizing the Middle Ear
A nose block device allows the diver to block his
nose to provide an overpressure in his middle ear for
equalization. The blocking pad on the inside of the
oral nasal mask is attached to a shaft which passes
through a packing gland to the outside of the helmet.
A knob attached to the end of the shaft can be pushed
in to slide the pad under the diver’s nose.
