Monessen Hearth KHLDV500, KHLDV400 Vertical through-the-roof applica- tions, VentNG installation

KHLDV Series Gas Fireplace

If the foundation
is recessed, use
recess brackets		Snorkel
(not supplied)
for securing	Foundation
lower portion
	Recess
of the snorkel.
		Wall
Fasten brack-
		Screws
ets to wall first,
then secure to	Watertight Seal
snorkel with		Sheet
self drilling #8 x	Around Pipe	Metal
1/2 sheet metal		Screws
screws. It will
be necessary Figure 20 -
to extend vent Snorkel Installation, Recessed Foundation
pipes out as far
as the protruding wall face. Figure 20

WARNING		soil.
	• Do not back fill around snorkel.
	•	A clearance of at least 4" must be
		maintained between the snorkel and the

vertical through-the-roof applica- tions

NOTICE	A restrictor disc must be installed on
	vertical terminations that are higher than
	12' (366 cm).

Install restrictor disc as shown in Figure 21 for vertically vented applications.

Up to two (2) restrictor discs may be needed for 40' instal- lation.

The two (2) restrictor discs suppled will work for most instal- lations. If a third disc is needed order Part No. 56D3027.

This gas fireplace has been approved for,

•Vertical installations up to 40' (12 m) in height. Up to a 10' (3 m) horizontal vent run can be installed within the vent system using a maximum of two 90° elbows. Figure 22

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 form floor of fireplace, the clearance for the horizontal run is 1" on all sides.

ventNG installation

Restrictor

Disc

Figure 21 -

Install Restrictor Disc into

Fireplace Collar

Fireplace

Collar

FP2703

40' Maximum Height

12' Minimum Height

10'

Maximum

24" Min.

Support Straps

Every 3'

FP1183

Figure 22 -

Support Straps for Horizontal Runs

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

•Up to two 45° elbows may be used within the horizontal run. For each 45° elbow used on the horizontal plane, the maximum horizontal length must be reduced by 18" (450 mm).

Example: Maximum horizontal length

No elbows	=	10’ (3 m)
1x45° elbows	=	8.5’ (2.6 m)
2x45° elbows	=	7’ (2.1 m)

•A minimum of an 8' (2.5 m) vertical rise is required.

•Two sets of 45°elbows offsets may be used within the vertical sections. From 0 to a maximum of 8' (2.5 m) of vent pipe can be used between elbows. Figure 23

•The maximum angular variation allowed in the system is 270°. Figure 23

•The minimum height of the vent above the highest point of penetration through the roof is 2' (610 mm).

18 73D0024