Lochinvar 000 Masonry Chimney Installations, Vertical Venting Terminations, Or Less, 2 MIN, Ridge

the tee. The drain tubing must have a trap provided by a 4" (10.2 cm)-diameter circular trap loop in the drain tubing. Prime the trap loop by pouring a small quantity of water into the drain hose before assembly to the vent. Secure the trap loop in position with nylon wire ties. Use caution not to collapse or restrict the condensate drain line with the nylon wire ties. The condensate drain must be routed to the condensate neutralization system or a suitable drain for disposal of condensate that may occur in the Category IV vent system. Refer to the condensate drain installation instructions as supplied by the manufacturer of the vent material. Ensure that the drain from the condensate tee is not exposed to freezing temperatures. See “Freeze Protection” for more information.

MASONRY CHIMNEY

INSTALLATIONS

A standard masonry chimney must NOT be used to vent the products of combustion from the flue of a Category IV, positive pressure appliance. If a masonry chimney is to be used, the chimney MUST use a sealed, metallic, corrosion resistant liner system to vent flue products from this high efficiency appliance. Sealed, metallic, corrosion resistant liner systems (single wall, double-wall, or flexible or rigid metallic liners) must be rated for use with a high efficiency Category IV, positive pressure vent system. Corrosion resistant chimney liner systems are typically made from a high grade of corrosion resistant stainless steel such as AL 29-4C. The corrosion resistant liner must be properly sized and fully sealed throughout the entire length if the flue is contained within the masonry chimney. Both the top and the bottom of the masonry chimney must be capped and sealed to provide a dead air space around the sealed corrosion resistant metallic liner. Consult with local code officials to determine code requirements or the advisability of using a masonry chimney with a sealed corrosion resistant liner system.

CAUTION￿

Venting of a high efficiency Category IV appliance into a masonry chimney without a sealed stainless steel liner can result in operational and safety problems. Any breaks, leaks or damage to the masonry flue/tile will allow spillage of the positive pressure flue products from the chimney. These flue products can easily escape into an occupied living space causing a health hazard. If there is any doubt about the condition of a masonry chimney, or its acceptability for use after insertion of a corrosion resistant liner system, consult with local code officials.

VERTICAL VENTING

TERMINATIONS

Follow all General Category IV Vent Termination Clearances.

	10' OR LESS
	2' MIN
RIDGE	3' MIN
	CHIMNEY

FIG. 13 Vent Termination from Peaked Roof - 10 Feet or Less from Ridge

MORE THAN 10'

10'

RIDGE

2' MIN

3' MIN

CHIMNEY

FIG. 14 Vent Termination from Peaked Roof - 10 Feet or More from Ridge

The vent terminal should be vertical and exhaust outside the build- ing at least 2 feet (0.61 m) above the highest point of the roof within a 10 foot (3.05 m) radius of the termination.

The vertical termination must be a minimum of 3 feet (0.91 m) above the point of exit.

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