American Water Heater DIRECT VENT GAS WATER HEATER Installation And Operating Instruction Manual page 17

Installation (Vent-Air Intake System Installation) continued-
1. Measure the vertical height "Y" required in your installation. (See Figure
6). Reference the appropriate Table A to determine number of vent-air
intake kits required in your installation.
2. Measure the horizontal length "X" required in your installation (See
Figure 6). Reference Table A to determine number of vent-air intake kits
required in your installation.
3. Cut a 5-1/2 inch (14 cm) diameter minimum clearance hole in the wall at
the point where the vent-air intake tubes will pass through the outside
wall and connect with the direct vent-air intake terminal
(See Figure 6).
4. From outside the building, position the outer wall mount plate and direct
vent-air intake terminal over the center of the opening. Mark the
mounting screw hole locations. With a 3/16 inch diameter drill bit (not
supplied), drill holes for the wall anchors (supplied). Install the wall
anchors but DO NOT affix the outer wall mount plate and direct vent-air
intake terminal to the wall at this time (See Figure 7). Note: Certain
construction of walls may require the use of a different type of wall
anchoring means than supplied. DO NOT modify the direct vent-air
intake terminal or outer wall mount plate.
Figure 7
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