NORITZ AMERICA NCC1991-DV Installation Manual
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Contents
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15Vent Pipe InstallationHorizontal Vent Termination- PVC/CPVC Materials OnlyIntake and exhaust should face the same direction.Intake and exhaust should keep the samepressure zone.2ft. MinInterior ViewInterior View Exterior ViewInterior View Exterior View1ft. Min1ft. Min•Insert the bird screen.90° elbow vertical setting (downward).•Ensure at least 3ft (0.9m) or more distance betweenthe near edge of the air intake pipe or exhaust pipeto the inside corner of a wall.•Ensure at least 2ft (0.6m) or more distance betweenintake pipe and exhaust pipe.The distance is measured at inside of pipe to innerdimension.•Intake and exhaust should face the same direction.Intake and exhaust should keep the samepressure zone.•Insert the bird screen.90° elbow vertical setting (downward).•Ensure at least 3ft (0.9m) or more distance betweenedge of air intake pipe or exhaust pipe and corner wall.•Upper side is exhaust, lower side is intake.The reverse connection is not allowed.•Ensure at least 1ft (0.3m) or more distance betweenintake pipe and exhaust pipe.The distance is measured at the outlets ofintake port (terminal) and exhaust port (terminal).•Intake and exhaust should face the same direction.Intake and exhaust should keep the samepressure zone.•Insert the bird screen.90° elbow vertical setting (downward).•Ensure at least 3ft (0.9m) or more distance betweenedge of air intake pipe or exhaust pipe and corner wall.•The side distant from wall is intake, the side near thewall is exhaust.The reverse connection is not allowed.•Ensure at least 1ft (0.3m) or more distance betweenintake pipe and exhaust pipe.The distance is measured at inside of pipe to innerdimension.••ExhaustIntakeExhaust Intake1ft. MinExterior ViewExhaustExhaustIntakeIntakeExhaust Intake3” MinWARNINGIf the distance between the air inlet and exhaust vent terminations is too short, the water heaterwill draw in the exhaust gases through the intake. There is a risk of inadequate combustion airfor the water heater, increasing Carbon Monoxide (CO) emissions and noise due to vibration.• Termination elbows must be oriented vertically, pointing directly downward. Attempts to preventexhaust air from entering the air inlet by angling termination elbows in directions other thandirectly downward will increase the risk of freezing.• Reversing the air intake and exhaust pipes is not allowed.Carbon Monoxide (CO) emissions and noise due to vibration will increase.3” Min3” Min5.9”5.9”5.9” |
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