Lochinvar 5 operation manual Vertical direct venting continued, Installation & Operation Manual

Installation & Operation Manual

4 Vertical direct venting (continued)

Multiple vent/air terminations

1.When terminating multiple SYNC boilers, terminate each vent/air connection as described in this manual (FIG. 4-3).

￿WARNING Terminate all vent pipes at the same height and all air pipes at the same height to

avoid recirculation of flue products and the possibility of severe personal injury, death, or substantial property damage.

2.Place roof penetrations to obtain minimum clearance of 12 inches (305 mm) between edge of air intake elbow and adjacent vent pipe of another boiler for U.S. installations (see FIG. 4-3). For Canadian installations, provide clearances required by CSA B149.1 Installation Code.

3.The air inlet of a SYNC boiler is part of a direct vent connection. It is not classified as a forced air intake with regard to spacing from adjacent boiler vents.

Figure 4-3Vertical Terminations with Multiple Boilers

12" (305 MM) MINIMUM VERTICALLY FROM VENT OUTLET TO ANY AIR INLET

		VENT
	AIR	12" (305 MM) MINIMUM FROM EDGE
VENT		OF AIR INTAKE PIPE TO ADJACENT
AIR		VENT PIPE FROM ANOTHER BOILER

Figure 4-4Alternate Vertical Terminations with Multiple Boilers

VENT

VENT

12" (305 MM) MINIMUM VERTICALLY FROM VENT OUTLET TO ANY AIR INLET

AIR

AIR

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