Lochinvar WH 55-399 Multiple vent/air terminations, Sidewall direct venting continued

Installation & Operation Manual

4 Sidewall direct venting (continued)

Prepare wall penetrations (Alternate - Field Supplied Option)

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 as shown in FIG. 4-4C.

3.Use a sidewall termination plate as a template for correct location of hole centers.

4.Follow all local codes for isolation of vent pipe when passing through floors or walls.

5.Seal exterior openings thoroughly with exterior caulk.

Figure 4-4CAlternate Sidewall Termination Assembly w/Field Supplied Fittings

ELBOW

AIR PIPING

VENT PIPING

BIRD SCREEN

GALVANIZED		ELBOW
THIMBLE
	SIDEWALL	BIRD SCREEN
	TERMINATION PLATE

Multiple vent/air terminations

Figure 4-5AMultiple Vent Terminations (must also comply with Figure 4-1A)

12" MIN. BETWEEN EDGE OF AIR INLET AND ADJACENT VENT OUTLET

VENT

AIR

VENT / AIR

TERMINATION

Figure 4-5BAlternate Multiple Vent Terminations w/Field Supplied Fittings (must also comply with Figure 4-1B)

1.When terminating multiple Knight wall mount boilers terminate each vent/air connection as described in this manual (FIG. 4-5A).

￿WARNING

All vent pipes and air inlets must terminate at the same height to avoid possibility of severe personal injury, death, or substantial property damage.

2.Place wall penetrations to obtain minimum clearance of 12 inches between edge of air inlet and adjacent vent outlet, as shown in FIG. 4-5A for U.S. installations. For Canadian installations, provide clearances required by CSA B149.1 Installation Code.

3.The air inlet of a Knight wall mount 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.

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