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Page 37
CHAPTER THREE
SECTION 3.5
DIRECTOR 1 EHU (continued)
RETURN TUBE ASSEMBLY (continued)
Install the element return mounting plate (PN 10-1608-01). Use four of the 2-1/2” aluminum saddles
(PN 10-1601-41), 5/16” x 4-1/2” hex head bolts (PN 60-0115) and 5/16” Nylock nuts (PN 60-0046) as
shown in
figure 3.52
. Tighten the nuts, but leave loose enough to adjust for the center-to-center
measurement. Using four of the 2” aluminum saddles, 5/16” x 3-3/4” hex head bolts (PN 60-0114) and
Nylock nuts, loosely install the return tube saddles as shown in
figure 3.53
.
Insert the element return tube (PN 10-1015-11). Be sure that the return tube is protruding out approx-
imately 2.5 inches away from the aluminum saddle edge on each side as shown in
figure 3.54
. Be sure
to position the slotted portion of the stress relief tube so that if faces downward as shown in
figure 3.55
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 1 EHU to the center-point of the element re-
turn tube as shown in
figure 3.56
. Level the return bracket assembly as shown in
figure 3.57
and tight-
en the saddle bolts firmly. Do not forget to use anti-seize on all stainless steel fasteners, and also re-
member to install a set screw into each saddle pair (one set screw per saddle pair).
FIG. 3.54
FIG. 3.55
FIG. 3.56
FIG. 3.57
FIG. 3.53
FIG. 3.52
