Monessen Hearth 36CDVXTRN CDVX Series Direct Vent Gas Fireplace, 20012253

CDVX Series Direct Vent Gas Fireplace

Zero Clearance Sleeve	Screws
(if required)
	7TDVSNORK
Firestop	(Snorkel)
7” Pipe	4” (102mm)
	Clearance
	Min.

24” (610mm)	Window
	Well
Minimum*
	Gravel
	Drain
	Foundation Wall
	*A minimum of 24” (610mm) ver-
	tical pipe must be installed when
	using the 7TDVSNORK Kit.
	*The 22” (559mm) vertical rise
	(center to center) of the snorkel
	may be included for calculationof
	max. horizontal run.
BG402
Fig. 53 Below grade installation.
	Snorkel
Foundation Recess	Wall Screws
Recess Brackets
Watertight Seal	Sheet Metal
Around Pipe
	Screws
	BG401

Fig. 54 Snorkel installation, recessed foundation.

Vertical Through-the-Roof Applications

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. (Fig. 55)

•Up to two 45° elbows may be used within the horizontal run. For each 45° elbow used on the horizontal level the maximum horizontal length must be reduced by 18” (457 mm).

Example: Maximum horizontal length 0 x 45° elbows = 10’ (3 m)

1 x 45° elbows = 8¹⁄₂’ (2.6 m)

2 x 45° elbows = 7’ (2.1 m)

•A minimum of an 8’ (2.4 m) vertical rise.

Max. 10' (3m)

Max. Height

40' (12m)

Min. Height

756O' (2.3m)

Pipe Straps Every

3’ (914mm)

FP1244

Fig. 55 Support straps for horizontal runs.

•Two sets of 45° elbows offsets within these vertical installations. From 0 to a maximum of 8’ (2.m) of vent pipe can be used between elbows. (Fig. 56)

•7DVCS must be used to support offsets. (Fig. 58) This application will require that you first determine the roof pitch and use the appropriate starter kit. (Refer to Venting Components List)

•The minimum height of the vent above the highest point of penetration through the roof is 2’ (610 mm). (Fig. 60)

Vertical Through-the-Roof Installation

1.Locate your fireplace.

2.Plumb to center of the (4” (102 mm) flue collar from ceiling above and mark position.

3.Cut opening equal to 9³⁄₈” x 9³⁄₈” (240 x 240 mm).10³⁄₈” x 9³⁄₈” (264 x 240 mm) when using 7TCRVT1320.

4.Proceed to plumb for additional openings through the roof. In all cases, the opening must provide a minimum of 1” (25 mm) clearance to the vent pipe, i.e., the hole must be at least 9³⁄₈” x 9³⁄₈” (240 x 240 mm).

5.Place fireplace into position.

6.Place firestop(s) #7DVFS or Attic Insulation Shield #7DVAIS into position and secure. (Fig. 57)

7.Install roof support (Fig. 58) and roof flashing making sure upper flange of flashing is below the shingles. (Fig. 59)

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