Seiwa SWRx series - Manual (Page 8)

10 User Manual
1.3 INSTALLATION PROCEDURE
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Prepare the mounting surface by making sure it is clean and flat.
NOTE It is a better to check the accuracy of the template by measuring the actual
dimension between the hole locations. The reproduction process and mois-
ture absorption can affect accuracy.
♦
Use the template provided to mark the location of four mounting holes.
Align the template squarely with the centerline of the vessel and with
the arrow pointing forward.
♦
Drill four 3/8 in. (10 mm) diameter holes through the mounting sur-
face.
♦
Check that each bolt (with lock washer and flat washer) protrude through
the mounting surface at least 5/16 in. (8 mm) but less than 9/16 in.
(15 mm). The scanner will be damaged if bolts protrude more than 9/
16 in. (15 mm).
♦
Apply sealant around each mounting hole.
♦
Place the Radar scanner unit on the mounting surface. Orient the scan-
ner with the index mark on the housing facing forward (cable gland
facing aft).
♦
Install and tighten four M8 x 25U (M8 x 1 in.) mounting bolts.
♦
Uncoil the scanner cable.
♦
Secure the cable near the scanner to support the weight of the cable
and prevent strain on the watertight cable seal. If the cable is to pass
through tubing or a bulkhead, protect the unfinished end. Do not use
the unfinished wires or fabric braid to pull the cable. Attach a fish cord
only to the cable jacket.
♦
Route the cable to the operator’s location, securing it at appropriate
points along the way. Make a drip loop and apply sealant at the entry
point of an exterior bulkhead.
1.4 ELECTRICAL AND DATA CONNECTIONS
The cable from RADAR scanner unit provides all power, data and control connec-
tions necessary for operation. The large black and white leads are for power
connections and connect directly to a 12 to 24 VDC power buss; the five small
leads, in the fabric braid, connect to the Radar Junction Box; and the two remain-
ing small leads connect to the On/Off control switch. The On/Off control switch
does not switch the main power leads to the scanner unit, but it does provide a
signal that controls DC power inside the scanner unit.
1.5 CONNECTION PROCEDURE
NOTE In the following procedures, small wires must be stripped and tinned, and
then connected to the proper connections in the Radar Junction Box, and to
pins on the On/Off control switch. If you are uncertain of your skill in
completing these tasks, it is strongly advised to obtain the services of a
qualified technician. It is essential to the operation and reliability of your
RADAR that these procedures are accomplished properly.
♦
Arrange the free end of the scanner cable so that the unfinished leads
will reach their intended points for connections. The two large wires
must reach a power panel; the five leads in the braided fabric jacket
must reach the Radar Junction Box and the two remaining leads must