Side Wall Air Intake Termination - Viessmann Vitocrossal 300 CU3A Installation Instructions Manual

CU3A Venting Systems Installation

Side Wall Air Intake Termination

Side Wall
Grade or max. snow level
Installation of field fabricated air intake riser (side view)
Side wall air intake termination (side view)
Support Bracket
Attach
Termination
Elbow w/Screen
Air Intake
Riser
Min. 12 in.
(31 cm)
Caulk
Attach Termination
Elbow w/Screen
Air Intake
min. 2 in. (50 mm)
Direct Venting (Two-pipe System)
IMPORTANT
The air intake system must terminate so that proper
clearances are maintained as cited in local codes or the
latest edition of the "Natural Gas and Propane Installation
Code" CAN/CSA-B149.1 (Canada), or the "National Fuel
Gas Code" ANSI Z223.1 (NFPA 54) (U.S.A.). See pages
7 and 8.
WARNING
Air intake must be at least 12 in. (300 mm) above the
anticipated snow level (consult your local building
authorities or local weather office).
Locate vent termination in such a way that it cannot be
blocked by snow.
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