© Miller Diving All Rights Reserved Document # 030715001
22
3-O COMMUNICATIONS SYSTEM
DESCRIPTION:
Two way communications system consists of two Bind-
ing Posts, Speaker Wire, a Microphone mounted inside
the Oral Nasal Mask and two Earphones mounted with
Velcro for easy removal and inspection. All speakers are
wired in parallel, which prevents the failure of one unit
from affecting the performance of the others.
REMOVAL AND REPLACEMENT:
1. Remove Face Plate. Refer to section 3-B.
2. Binding Posts are located on the side of the Helmet just
below the Freeflow Manifold. To remove Binding Post
insert a small nail or pointed punch in wire hole (outside
of Helmet) while turning nuts (inside of Helmet). This
will keep post from rotating.
3. Remove Speaker Wire.
4. Push Binding Posts out through the holes.
5. Remove old silicone sealant from hole area.
6. Install new binding posts.
NOTE: Do not use substitutes as Miller Binding Posts
are fully insulated and designed specifically for the Miller
Diving Helmet. Uninsulated substitute posts may short
out communications after being in the water for a pe-
riod of time.
7. Apply thin coat of silicone sealant around the shaft prior
to installing Post in the Helmet.
8. Replace nuts on inside of Helmet. Replace Speaker Wire
securing Speaker Wire with 2nd nut. Prevent post from
turning by securing with a small nail or pointed punch in
wire hole.
9. The Ear phones and Microphone are easily replaced if
necessary. They are attached to the Helmet with Velcro
for easy adjustment and plug easily onto Speaker Wire
Assembly.
WARNING: Never dive without attaching
the umbilical to some type of harness or clip on
the diver’s body. Never allow the umbilical to pull
on the helmet directly or the diver could suffer a
neck injury.
3-P
FACE GUARD (optional)
WELDING SHIELD (optional)
The optional Face Guard protects the Face Plate from
scratches as well as adding an attractive appearance. It
also serves as a mount for the optional Flip-up Welding
Shield. Both units are constructed of solid bronze for
strength, yet are very light weight. A standard size Weld-
ing Lens mounts with two Screws to the Welding Shield.
WARNING: Use only original Miller Div-
ing replacement spares when repairing your
helmet. The use of other manufacturer’s parts
will interfere with the performance characteris-
tics of your life support equipment and may
jeopardize your safety. Additionally, any substi-
tutions will void all warranties offered by Miller
Diving.
3-Q
PREVENTIVE MAINTENANCE
Frequency of Helmet maintenance must be determined
by each diver, as amount and variation of use will change
with each individual. Salt water use, hand jetting and
working in contaminated water all mean more frequent
maintenance.
Routinely inspect the Helmet for wear or damage. Fol-
low pre-dive procedures. See Page 8.
Monthly, (or between jobs) maintenance is recom-
mended. (see sections noted for details).
1. Inspect Face Plate for damage. Clean with warm, soapy
water.
2. Remove Nose Device Rod, lubricate O-rings and check
for smooth operation. See Page 13.
3. Clean and inspect Oral Nasal Mask for wear and dam-
age. See Page 13.
4. Remove Valve Stem and Packing. Inspect, clean and
lubricate all parts and Body. See Page 14.
5. Disassemble, inspect and clean Check Valve. Assemble
and test. See Page 15.
6. Remove Side Exhaust Handle. Inspect, clean and lu-
bricate Exhaust Valve and O-ring. See Page 16.
