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Page 37
Install the element return mounting plate (PN 10
-
1608
-
01). Use four of the
2”
aluminum saddles
(PN 10
-
1601
-
22),
5/16”
x
3
-
1/2”
hex head bolts and
5/16”
Nylock nuts as shown in
figure 3.50
. Tighten
the nuts, but leave loose enough to adjust for the center
-
to
-
center measurement. Using four of the 1
-
3/4 aluminum saddles (PN 10
-
1601
-
03),
5/16”
x
3
-
1/2”
hex head bolts, and Nylock nuts, loosely install
the
1
-
3/4”
aluminum return tube saddles (PN 10
-
1601
-
03) as shown in
figure 3.51
.
Insert the element return tube (PN 10
-
1015
-
11) as shown in
figure 3.52
. Be sure that the return tube
is protruding out approximately 2.5 inches away from the aluminum saddle edge on each side, as
shown in
figure 3.53
. Tighten the saddles to a maximum of 7 ft lb (9.5Nm). This is very important.
The aluminum saddles can crush the fiberglass tubes if the saddles are too tight.
Measure 30 inches from the center
-
point of the Director EHU to the center
-
point of the element return
tube as shown in
figure 3.54
. Level the return bracket assembly as shown in
figure 3.53
and tighten
the saddle bolts firmly. Do not forget to use anti
-
seize on all stainless steel fasteners, and also remem-
ber to install a set screw into each saddle pair (one set screw per saddle pair).
Figure 3.55
shows the completed Driven EHU and return bracket.
CHAPTER THREE
SECTION 3.5
MOUNTING THE EHU
’
S ON THE BOOM (continued)
MOUNTING THE ELEMENT RETURN TUBE—DRIVEN
FIG. 3.50
FIG. 3.55
FIG. 3.51
FIG. 3.52
FIG. 3.54
FIG. 3.53