Bradford White DS1-50S6FSX - Manual (Page 18)

18
Optional Vent-Air Intake System Installations continued-
5. For a Single Telescopic Tube
Extend the three (3) inch (7.6 cm) diameter telescopic tube to its
maximum length and slide the backing plate over it. Place the large end
of the three (3) inch (7.6 cm) diameter telescopic tube through the hole in
the outside wall. Insert the smaller end of the three (3) inch diameter (7.6
cm) telescopic tube into the flared end of the three (3) inch (7.6 cm)
diameter elbow, one (1) inch (2.5 cm) (or until seated). Drill three (3) 1/8
inch diameter holes, 120
o apart, through the three (3) inch (7.6 cm)
diameter elbow into the three (3) inch (7.6 cm) diameter telescopic tube.
Fasten with three (3) #8 sheet metal screws (supplied). Adjust the overall
length of the three (3) inch (7.6 cm) diameter telescopic tube so that 2-1/2
inches (6.4 cm) extends beyond the outside wall. Drill three (3) 1/8 inch
diameter holes, 120
o apart, through the three (3) inch (7.6 cm) diameter
telescopic tubes where the small and large sections overlap. Fasten with
three (3) #8 sheet metal screws (supplied). Using the supplied RTV
silicone sealant, apply a sufficient amount to seal all joints. (See Figure
15a).
For Multiple Telescopic Tubes
Extend the three (3) inch (7.6 cm) diameter telescopic tubes to their
maximum lengths. Join the tubes by inserting the small end of a tube into
the large end of another, one (1) inch (2.5 cm) (or until seated). With a
1/8 inch diameter drill bit (not supplied), drill three (3) holes, 120
o apart,
through each joint where the three (3) inch (7.6 cm) diameter telescopic
tubes are joined. At this time, DO NOT drill holes where the small and
large sections of the three (3) inch (7.6 cm) telescopic tubes overlap.
Fasten each joint with three (3) #8 sheet metal screws (supplied). (See
Figure 15b). Slide the backing plate over the joined three (3) inch (7.6
cm) diameter telescopic tubes. Place the large end of the joined three (3)
inch (7.6 cm) diameter telescopic tubes through the hole in the outside
wall. Insert the smaller end of the joined three (3) inch diameter (7.6 cm)
telescopic tubes into the flared end of the three (3) inch (7.6 cm) diameter
elbow, one (1) inch (2.5 cm) (or until seated). Drill three (3) 1/8 inch
diameter holes, 120
o apart, through the three (3) inch (7.6 cm) diameter
elbow into the joined three (3) inch (7.6 cm) diameter telescopic tube(s).
Fasten with three (3) #8 sheet metal screws (supplied). Adjust the overall
length of the joined three (3) inch (7.6 cm) diameter telescopic tubes so
that 2-1/2 inches (6.4 cm) extends beyond the outside wall. Drill three (3)
1/8 inch diameter holes, 120
o apart, through the joined three (3) inch (7.6
cm) diameter telescopic tubes where the small and large sections overlap.
Fasten with three (3) #8 sheet metal screws (supplied). Using the
supplied RTV silicone sealant, apply a sufficient amount to seal all joints.
(See Figure 15c).