Monessen Hearth KHLDV400, KHLDV500 ventING installation, Below Grade Installations, Example

ventING installation					KHLDV Series Gas Fireplace
		90°		Below Grade Installations
				When it is not possible to meet the required vent terminal
	A		B	clearances of 12" above grade level, a snorkel kit is recom-
				mended. It allows installation depth down to 7" (178 mm)
				below grade level. The 7" (178 mm) is measured from the
				center of the horizontal vent pipe as it penetrates through
				the wall.
				Ensure that sidewall venting clearances are observed.
				If venting system is installed below ground, we recom-
				mend a window well with adequate and proper drainage
				to be installed around the termination area.
				If installing a snorkel, a minimum 24" vertical rise is neces-
			10’	sary. The maximum horizontal run with the 24” vertical pipe
				is 36". This measurement is taken from the collar of the
				fireplace (or transition elbow) to the face of the exterior wall.
				See the Sidewall Venting Graph for extended horizontal
FP2133			Figure 17 -	run if the vertical exceeds 24".
			Horizontal Run
				1. Establish vent hole through the wall.
			Reduction
				2. Remove soil to a depth of approximately 16" below base
					of snorkel. Install drain pipe. Install window well (not
					supplied). Refill hole with 12" of coarse gravel leaving
• The maximum number of 45° elbows permitted per side					a clearance of approximately 4" below snorkel. Figure
wall installation is two (2). These elbows can be installed					19
				3.	Install vent system.
in either the vertical or horizontal run.
• For each 45° elbow installed in the horizontal run, the				4.	Ensure a watertight seal is made around the vent pipe
length of the horizontal run MUST be reduced by 18" (45					coming through the wall.
cm). This does not apply if the 45° elbows are installed				5. Apply high temperature sealant caulking (supplied)
on the vertical part of the vent system.					around the 5" and 8" snorkel collars.
• The maximum number of elbow degrees in a system is				6.	Slide the snorkel into the vent pipes and secure to the
270°. Figure 18					wall.
				7. Level the soil so as to maintain a 4" clearance below
Example:	Elbow 1	=	90°		snorkel. Figure 19
	Elbow 2	=	45°		Screws
	Elbow 3	=	45°
	Elbow 4	=	90°

Total Angular Variation	=	270°		Firestop	Minimum
1					4" Clearance
					Ground
2			24"		Window
3					Well
			Minimum		Gravel
4
					Drain
24"
Minimum					Foundation Wall
Figure 18 -			FP2134		Figure 19 -
		FP1180			Below Grade Installation
Maximum Elbow Usage

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