Monessen Hearth 36CDVXTRN Vertical Sidewall Installation, Maximum number of elbows

CDVX Series Direct Vent Gas Fireplace

Example:
Elbow 1	=	90˚	4
Elbow 2	=	45˚
Elbow 3	=	45˚
Elbow 4	=	90˚
Total angular variation = 270˚
	1 + 2 + 3 + 4 = 270o
		2	3
		1
			CFM132
Fig. 29 Maximum number of elbows.

•IMPORTANT• Minimum clearance between vent pipes and combustible materials is one (1”) inch (25 mm) on bottom, sides and top.

Twist Lock Vent Starter Kit 7TCRVT, plus Elbow 7TCDV90 must be used in Vertical Sidewall installations.

Canadian & USA Installations:

The venting system must conform with local codes, or in the absence of local codes, with National Fuel Gas Code, ANSI Z223.1/NFPA 54 - latest edition, or CSA B149.1 Installation Code.

Only MHSC venting components specifically approved and labelled for this fireplace may be used.

Vertical Sidewall Installation

STEP 1

Locate vent opening on the wall. It may be necessary to first position the fireplace and measure to obtain hole location. Depending on whether the wall is combustible or noncombustible, cut opening to size. (Page 14, Fig. 17)

For combustible walls first frame in opening.

Combustible Walls (Fig. 17): Cut a 9³⁄₈”H x 9³⁄₈” W (240 x 240 mm) hole through the exterior wall and frame. For 7TCRVT1320 cut a 10³⁄₈”H x 9³⁄₈” W (264 x 240 mm) hole.

Noncombustible Walls (Fig. 17): Hole opening must be 7.5” (190 mm) in diameter.

STEP 2

Slide venting component on collar of fireplace. Secure component to fireplace by running a screw (self-tap- ping) through tab & into outer casing. (Fig. 30)

Ensure Pipes are

Concentric

8

7TCDV90

CFM143a

Fig. 30 Always start vertical run with 7TCDV90 on 36CDVR unts.

STEP 3

Measure the horizontal length requirement including a 2” (51 mm) overlap, i.e. from the elbow to the outside wall finish plus 2”, or the distance required if installing a second 90° elbow. (Fig. 31)

X

Always install hori- zontal venting on a level plane.

CFM136

Fig. 31 Measure horizontal length including 2” overlap.

STEP 4

Use appropriate length of pipe section - telescopic or fixed - and install the horizontal vent sections. A starter section of pipe which goes through the wall is packaged with the 7TCRVT kit, and can be cut to suit if necessary. (Fig. 32)

Sealing between the vent pipe and firestop with high temperature sealant will restrict cold air being drawn in around fireplace.

STEP 5

Guide the vent termination’s 4” and 7” collars into their respective vent pipes. Double check that the vent pipes overlap the collars by 2” (51 mm). Secure the termination to the wall with screws provided and caulk around the wall plate to weatherproof. (Fig. 33)

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