American Water Heater DIRECT VENT GAS WATER HEATER Installation And Operating Instruction Manual page 19

Installation (Vent-Air Intake System Installation) continued-
7. 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
o
inch diameter holes, 120 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)
o
1/8 inch diameter holes, 120
diameter telescopic tubes where the small and large sections overlap.
Fasten with three (3) #8 sheet metal screws (supplied). Using the
supplied special RTV silicone sealant, apply a sufficient amount to seal
the joints (See Figure 10).
Figure 9
apart, through the three (3) inch (7.6 cm)
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