Monessen Hearth KHLDV500 VERTICAL/Horizontal termination configurations, ventING installation

KHLDV Series Gas Fireplace ventING installation

VERTICAL/Horizontal termination configurations

Since it is very important that the venting system main- tain its balance between the combustion air intake and the flue gas exhaust, certain limitations as to vent con- figurations apply and must be strictly adhered to.

The Vent Graph, showing the relationship between vertical and horizontal side wall venting, will help to determine the various dimensions allowable. Figure 10

NOTE: Horizontal sections of this vent system require a minimum of 3" clearances to combustibles at the top of the flue and 1" clearance at the sides and bottom until the flue penetrates the outside wall. A minimum 1" clearance all around the flue is acceptable at this point of penetration. Unless the vertical run is 7Z\x feet or higher from floor of fireplace, the clearance for the horizontal run is 1" on all sides.

Vertical sections of this vent system require a minimum of 1" clearance to combustibles on all sides of the pipe.

When vent exits through foundations less than 20" below outcrop, the termination must be flush up with outcropped wall above.

It is best to locate the fireplace in such a way that minimizes the number of offsets and horizontal vent length.

The horizontal vent run refers to the total length of vent pipe from the flue collar of the fireplace (or the top of the Transition Elbow) to the face of the finished outside wall.

•The maximum number of 90° elbows per side wall installation is three (3). Figure 14

3 x 90°

Elbows

24" Min.

FP1176

Figure 14 - Maximum Three (3) 90° Elbows Per Installation

•A minimum of 24" is required before a 90° elbow. If a 90° elbow is fitted directly after 24" vertical section mounted to the top of the fireplace, the maximum horizontal vent run before the termination or a vertical rise is 36” (914 mm). Figure 15

	36"
24”	(914 mm)
	Max.

(610 mm)

36"

(914 mm) Max.

Figure 15 -

Maximum Horizontal Run with No Rise

FP1177

•If a 90° elbow is used in the horizontal vent run (level height maintained) the horizontal vent length is reduced by 36". Figures 14 and 15. This does not apply if the 90° elbows are used to increase or redirect a vertical rise. Figure 16

B 7’ A 10’

	90° Elbow = 3'
10’	A + B = 17' Maximum

Figure 16 -

Maximum Vent Run with Elbows

FP1959

Example: According to the vent graph (Page 16) the maxi- mum horizontal vent length in a system with a 10' vertical rise is 20’ (6 m) and if a 90° elbow is required in the hori- zontal vent it must be reduced to 17' (5.2 m).

In Figures 16 and 17 dimension A plus B must not be greater than 17' (5.2 m).

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