American Water Heater DIRECT VENT GAS WATER HEATER Installation And Operating Instruction Manual page 21

Installation (Vent-Air Intake System Installation) continued-
9. From outside the building, slide the five (5) inch (12.7 cm) diameter
telescopic tube through the opening in the wall until the outer wall mount
plate is flush with the wall (See Figure 12).
10. Using the supplied special RTV silicone sealant, apply a bead one (1)
inch (2.5 cm) from the end of the three (3) inch (7.6 cm) diameter tube
that is part of the vent-air intake terminal. Slide the direct vent-air
intake terminal into the three (3) inch (7.6 cm) diameter telescopic tube
that extends through the wall and position it so it is flush with the outer
wall mount plate. Make sure that the rain guard and the word "HOT" on
the end of the direct vent-air intake terminal are oriented properly.
Secure the direct vent-air intake terminal to the outer wall mount plate
and wall with four (4) #10 x 1 inch screws (supplied) (See Figure 13).
Note: Certain construction of walls may require the use of different type
of anchoring means than supplied. DO NOT modify the direct vent-air
intake terminal or outer wall mount plate.
Figure 12
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