![Prepare roof penetrations](/images/new-backgrounds/35382/3538251x1.webp)
TM
Installation & Service Manual
4Vertical direct venting
Vent/air termination – vertical
Prepare roof penetrations
1.Air pipe penetration:
a.Cut a hole for the air pipe. Size the air pipe hole as close as desired to the air pipe outside diameter.
2.Vent pipe penetration:
a.Cut a hole for the vent pipe. For either combustible or noncombustible construction, size the vent pipe hole with at least a 1/2 inch clearance around the vent pipe outer diameter:
•4½ inch hole for 3 inch vent pipe
•5½ inch hole for 4 inch vent pipe
b.Insert a galvanized metal thimble in the vent pipe hole.
3.Space the air and vent holes to provide the minimum spacing shown in FIG.
4.Follow all local codes for isolation of vent pipe when passing through floors, ceilings, and roofs.
5.Provide flashing and sealing boots sized for the vent pipe and air pipe.
Termination and fittings
1.Prepare the vent termination coupling and the air termination elbow (FIG.
2.The air piping must terminate in a
3.The vent piping must terminate in an
4.Maintain the required dimensions of the finished termination piping as shown in FIG.
5.Do not extend exposed vent pipe outside of building more than shown in this document. Condensate could freeze and block vent pipe.
Multiple vent/air terminations
1.When terminating multiple Shield water heaters, terminate each vent/air connection as described in this manual (FIG.
Terminate all vent pipes at the same height WARNING and all air pipes at the same height to avoid
possibility of severe personal injury, death, or substantial property damage.
2. Place roof penetrations to obtain minimum clearance of 12 inches between edge of air intake elbow and adjacent vent pipe of another water heater for U.S. installations (see FIG.
3. The air inlet of a Shield water heater is part of a direct vent connection. It is not classified as a forced air intake with regard to spacing from adjacent water heater vents.
Figure
Figure
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