Furuno FR-2115-B installation manual Assembling the antenna unit

1.1.2 Assembling the antenna unit

The antenna unit consists of the antenna radiator and the antenna unit chassis, and they are packed separately. Fasten the antenna radiator to the antenna unit chassis as follows:

1.For the XN20AF, XN24AF, attach two guide pins to the underside of the antenna radiator.

2.Remove the waveguide cap from the radiator bracket. The cap may be discarded.

3.Coat the waveguide flange with anticorrosive sealant as shown in Figure 1-1.

10 mm O-ring

Hole for

a guide pin

5 mm

Hole for

a guide pin

Anticorrosive sealant

Figure 1-1 Coating the waveguide flange with anticorrosive sealant

4.Coat fixing holes for the antenna radiator with anticorrosive sealant.

5.Grease the O-ring and set it to the O-ring groove of the radiator flange.

6.Set the antenna radiator to the radiator bracket.

7.For the XN20AF, XN24AF, coat hex bolts (M8X40, slotted washer-head, 8 pcs.) with anticorrosive sealant and use them to loosely fasten the antenna radiator to the antenna unit chassis. For the XN12AF, coat hex bolts, flat washers and spring washers with anticorrosive sealant and use them to loosely fasten the antenna radiator to the antenna unit chassis.

8.For the XN20AF, XN24AF, remove two guide pins (inserted at step 1).

9.Tighten the bolts loosely fastened at step 7.

CAUTION

Be sure to remove the guide pins.

Injury may result if the guide pins loosen and fall.

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