Bradford White DS1-50S6FSX - Manual (Page 9)

9
Optional Vent-Air Intake System Installations continued-
Where:
V = The required length of the three (3) inch (7.6 cm) diameter
telescopic tube(s).
Y = Height from the ground to the horizontal centerline of the vent-
air intake system.
Figure 4
3. For a Single Telescopic Tube
Adjust the length of the three (3) inch (7.6 cm) telescopic tube to
dimension “V” calculated in the above formula. With a 1/8 inch drill bit
(not supplied), drill three (3) holes, 120
o apart, through the three (3) inch
(7.6 cm) diameter telescopic tube where the small and large sections
overlap. Fasten with three (3) #8 sheet metal screws (supplied). (See
Figure 5a).
For Multiple Telescopic Tubes
Join the three (3) inch (7.6 cm) diameter telescopic 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. Adjust the length of the joined three
(3) inch (7.6 cm) diameter telescopic tubes to dimension “V” calculated in
the above formula. 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 each joint with three (3) #8
sheet metal screws (supplied). (See Figure 5b).