The recommended APA inflator setting position is the same as
for a regular inflator. (Photograph 10)
Of course, normal exhaust operations and use of the quick re-
lease valve (rapid exhaust) by pulling the APA inflator main unit
are both possible. When primarily using the rapid exhaust func-
tion with the APA exhaust button, there is also an APA inflator
setting position that uses the BCJ hose holder to fasten with the
APA exhaust button right at hand. (Photograph 11)
■Note
In some cases, old BCs can not be replaced with APAs, for
example because some have different bracket diameters or
have the screw mounting rotation direction reversed. For
details on which products can be replaced with APAs,
please contact your store of purchase or contact us directly.
Preface
Thank you for purchasing this TUSA active purge assist (APA) in-
flator unit. This APA inflator is equipped with a 3-way exhaust
system that has the "①Normal exhaust by pressing the ex-
haust button" and "②Rapid exhaust operating of the OPEV by
pulling the inflator main unit section" of the previous TUSA infla-
tors and adds "③Rapid exhaust operating the OPEV by press-
ing the APA button".
The APA is a system that opens and closes the shoulder top
OPEV (over-pressure exhaust valve) with the force of the me-
dium pressure air to exhaust in the same way as ②. Since the
air piping is a simple structure just within the inflator main unit,
the APA is more compact and reliable than previous products of
the same model. Because rapid exhaust can be executed with
the simple operation of just pressing a button, smoother descent
is possible.
Replacement method
Use the following procedure to replace a standard TUSA BCJ in-
flator with an APA inflator.
Turn current BCJ inflator unit shoulder top screw cap coun-
ter-clockwise and remove the screw cap from the BCJ main
unit. (Photographs 1-3)
Setting the low pressure hose
Connect the plug for the coupler for the regulator BCJ medium
pressure hose, then fit in the low pressure hose in the groove on
the side of the inflator hose as in Photographs 8 and 9. This ar-
ranges the hose neatly and makes it easier to handle and
makes it easier to mount and remove the BCJ.
After removing the screw cap, check that the ring-shaped
silicone gasket at the center of the BCJ main unit mount is
securely fit into place. Be careful. If the gasket comes out
of place, this causes air leaks. (Photograph 4)
In order to ensure that the APA inflator unit can not come
loose, check that the screw cap groove and the main unit
mount groove are parallel with each other and fit securely
all the way in. (Photograph 7)
If the grooves are fit at a slant, remove the APA inflator unit,
then remount it correctly.
Put the screw cap for the replacement APA inflator unit on
the main unit mount and tighten the cap securely by turning
it clockwise. When the screw cap is tightened all the way,
the inflator hose section stops turning, so first align the in-
flator hose position so that it extends from the shoulder top
in the vertical direction, then tighten the screw cap. (Photo-
graphs 5-6)
Cautions for APA inflator usage
Reaching the bottom
If the APA inflator main unit is dragged along a surface, for ex-
ample when you reach the bottom, then sand and pebbles may
jam the APA exhaust button and make exhaust operation impos-
sible. If exhaust operations do become impossible, either use a
normal exhaust operation or use the quick release value func-
tion to exhaust. After exiting, carefully wash out the sand clog-
ging the button with running water.
Usage of other functions
For details on and precautions for usage of other functions,
please check the TUSA BCJ user's manual. This user's manual
can be downloaded from the TUSA homepage.
Address: http://www.tusa.com
(Photograph 1)
(Photograph 3) (Photograph 2)
(Photograph 4)
(Photograph 5)
(Photograph 7)
(Photograph 6)
(Photograph 8)
(Photograph 10) (Photograph 11)
(Photograph 9)
APA inflator unit
To take in air from the tank and obtain buoyancy, press the or-
ange inflation button. Holding down this button can take in more
air than necessary, so adjust the amount of air by repeatedly
pressing the button for a short while then releasing it. On the
other hand, air can be exhausted from the BCJ to lower buoyan-
cy by raising the APA inflator main unit high in the direction of
the water surface and pressing the regular exhaust button. It is
also possible to exhaust rapidly by pressing the APA exhaust
button. Of course, it is equipped with the quick release function,
which is a feature of TUSA BCJs. This function "enables you to
exhaust rapidly by grasping the APA inflator main unit with one
hand and just pulling in the horizontal direction".
＊See Page 21-22 of the BCJ user's manual.
4
1
2
3
normal
exhaust
button
APA
exhaust
button
inflation
button
1st.
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