Bradford White DS140S Installation And Operating Instruction Manual page 19

Installation (Vent-Air Intake System Installation) continued-
The following instructions detail the installation of the standard
horizontal vent-air intake kit supplied with the water heater.
5. Insert the straight end of the three (3) inch (7.6 cm) diameter elbow into
the flue reducer until firmly seated and oriented in the correct direction.
With a 1/8 inch diameter drill bit (not supplied), drill three (3) holes, 120
apart, through the flue reducer into the three (3) inch (7.6 cm) diameter
elbow. Fasten with three (3) #8 sheet metal screws (supplied). Using the
supplied special RTV silicone sealant, apply a sufficient amount to seal
the joint (See Figure 8).
6. Place the straight end of the five (5) inch (12.7 cm) diameter elbow over the
three (3) inch (7.6 cm) diameter elbow and plenum collar until seated on
top of the plenum box. Make certain that the five (5) inch (12.7 cm)
diameter elbow is oriented in the same direction as the three (3) inch (7.6
cm) diameter elbow and both are oriented in the correct direction. Drill
three (3) 1/8 inch diameter holes, 120
cm) diameter elbow into the plenum collar. Fasten with three (3) #8 sheet
metal screws (supplied) (See Figure 9).
IMPORTANT
Figure 8
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apart, through the five (5) inch (12.7
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