CL-HD Antenna Technical Instruction Manual
Page 2-3
Section 2 Preparation for Use and Installation
Issue 3.0
(i)
Channel or ‘I’ Beam Support:
Secure each assembled support pipe
to the support brackets installed in
step (d) as shown in Figure 2-4. Only
use the back pivot bolt to secure
support pipe. Pivot each support up
so there is access to the insulators
(item 11).
(j)
Pipe Style Support:
Position each
assembled support pipe over the
Safety Net Pipe Support so the ‘V’s of
the ‘V’ brackets fastened to the
bottom of the support brackets
straddle the top of the Safety Net
Pipe Support and the corner brackets
clear the end (see Figure 2-2). Pass
four stainless steel band clamps from
the optional kit through the
rectangular slots in each support
bracket and around the Safety Net
Pipe Support. Tighten the band
clamps in place. Remove the
outboard bolt and pivot the support
up so there is access to the insulators
(item 11). See Figure 2-4. Repeat for
all remaining Antenna Supports.
(k) Unreel antenna wire (item 24) and
feed the wire through all Insulators
(item 11).
(l) Attach the antenna wire to the first
Insulator (item 11) using a wire rope
thimble (item 13) and two (2) wire
rope clips (item 14) as in Figure 2-5.
(m) Connect a guy wire (item 12), to the
Guy wire bracket using a wire rope
thimble (item 13) and two (2) wire
rope clips (item 14) as in Figure 2-6.
(n) Lower the first Antenna Support Pipe
on to the Support brackets and
secure as in Figure 2-4. Terminate
the free end of the guy wire to a solid
bulkhead or structural member. Pull
the guy wire taut such that support
pipe is vertical and secure with two
(2) wire rope clips (item 14). Pull the
antenna wire tight.
(o) Determine where the down lead
connects to the antenna wire and
attach the Down lead (item 9) to the
antenna wire as shown in Figure 2-7.
NOTE
The other (unterminated) end of the down
lead will be connected to the ATU in step
(u). If convenient, connect the down lead
to the ATU now.
(p) Lower the next Antenna Support
bracket, and secure as in Figure 2-4.
Pull the antenna wire tight.
(q) Repeat step (k) for all but the last
remaining Helideck Antenna Support
Pipe.
(r) Attach the antenna wire to the last
Insulator (item 11) using a wire rope
thimble (item 13) and two (2) wire
rope clips (item 14) as in Figure 2-5.
Ensure antenna wire is tight.
(s) Connect a guy wire (item 12), to the
Guy wire bracket using a wire rope
thimble (item 13) and two (2) wire
rope clips (item 14) as in Figure 2-6.
(t) Lower the last Antenna Support Pipe
on to the Support brackets and
secure as in Figure 2-4. Terminate
the free end of the guy wire to a solid
bulkhead or structural member. Pull
the guy wire taut such that support
pipe is vertical and secure with two
(2) wire rope clips (item 14).
(u) If it was not connected previously,
connect the unterminated end of the
Down lead (item 9) to the ATU as in
Figure 2-7.
NOTE
Bond the Helideck Antenna Support Pipe
to the helideck’s safety netting structure.
If the safety netting structure is mobile,
you should also bond the safety netting
structure to the helideck structure.
