Bradford White DS1-50S6FSX - Manual (Page 13)

13
Optional Vent-Air Intake System Installations continued-
6. Extend the five (5) inch (12.7 cm) diameter telescopic tube(s) until it is one
(1) inch (2.5 cm) below the top of the three (3) inch (7.6 cm) diameter
telescopic tube(s). Drill three (3) 1/8 inch diameter holes, 120
o apart,
through the five (5) inch (12.7 cm) diameter telescopic tube(s) at the
joint(s) where the small and large sections overlap. Fasten with three (3)
#8 sheet metal screws (supplied). (See Figure 8a or 8b).
IMPORTANT
For ease of installation, it is recommended that none of the joint(s) in the
vent-air intake system are located inside a ceiling. However, if a joint does
end up inside a ceiling, conduct the following steps before installing the five
(5) inch (12.7 cm) diameter tube(s) to the plenum. Drill three (3) 1/8 inch
diameter holes, 120
o apart, through the five (5) inch (12.7 cm) diameter
telescopic tube(s) at the joint that will be located inside the ceiling. Fasten
the joint with three (3) #8 sheet metal screws (supplied). Apply a sufficient
amount of the supplied RTV silicone sealant to seal the joint.