Airmar B66VL - Manual (Page 4)

Figure 6. Paddlewheel insert, blanking plug,
BOW ►
flat side of
paddlewheel
O-rings
paddlewheel
pull ring
shaft
cap nut
paddlewheel
top view of
housing and
blade faces
paddlewheel
insert
insert
valve assembly
housing
and valve assembly (B744V shown)
notches
key (2)
valve
assembly
insert detail
cable
Installing the Paddlewheel Insert
WARNING: The O-rings must be intact and well lubricated to
make a watertight seal.
1. Attach one pull ring to the paddlewheel insert. Attach the second
pull ring to the blanking plug (see Figure 6).
2. After the sealant cures, inspect the O-rings on the paddlewheel
insert and lubricate them with the silicone lubricant supplied.
3. With the arrow on the top of the paddlewheel insert pointing
forward toward the bow, slide it into the housing with a twisting
motion until it is fully seated. (The insert fits one way only.) Take
care not to rotate the outer housing and disturb the sealant.
4. Wrap the safety strap around the cable and pass the holed end
through the slit in the opposite end. Attach the safety ring to the
hole midway in the strap. Insert the retaining pin in the hole in
the end of the strap. Slide the free end of the retaining pin
through the valve and insert. Secure the retaining pin with the
safety ring (see Figure 7).
Warning: Always attach the safety wire to prevent the insert
from backing out in the unlikely event that the cap nut fails or is
screwed on incorrectly.
5. Attach the safety wire. Wrap one end of the safety wire tightly
around the stem of the housing and twist it together with the
long end. Lead the wire straight up and through one eye in the
cap nut, then through the safety ring. Loop the wire through the
pull ring and twist it securely to itself.
Caution: If the multisensor came with a connector, do not
remove it to ease cable routing. If the cable must be cut and
spliced, use Airmar’s splash-proof Junction Box 33-035 and
follow the instructions provided. Cutting the cable or removing
the connector, except when using Airmar’s junction box, will
void the warranty.
6. Route the cable to the instrument, being careful not to tear the
cable jacket when passing it through the bulkhead(s) and other
parts of the boat. To reduce electrical interference, separate the
multisensor cable from other electrical wiring and the engine.
Coil any excess cable and secure it in place using zip-ties to
prevent damage.
7. Refer to the echosounder owner’s manual to connect the
multisensor to the instrument.
Preparing a Cored Fiberglass Hull
The core (wood or foam) must be cut and sealed carefully. The
core must be protected from water seepage, and the hull must be
reinforced to prevent it from crushing under the hull nut allowing
the housing to become loose.
Warning: Always wear safety goggles and a dust mask.
1. Drill a 3mm or 1/8" pilot hole perpendicular to the waterline from
inside the hull (see Figure 8). If there is a rib, strut, or other hull
irregularity near the selected mounting location, drill from the
outside. If the hole is drilled in the wrong location, drill a second
hole in a better location. Apply masking tape to the outside of the
hull over the incorrect hole and fill it with epoxy.
Figure 7. Installation (B744V shown)
blanking
plug
direction of
arrow on top
of insert
(toward bow)
4
pull ring
retaining pin
hull
fairing
multisensor
safety wire
cap nut
hull nut
backing
stem
cable
block
safety strap
safety ring
AIRMAR ®
AIRMAR ®