Monessen Hearth 36CDVXTRN 36CDVXT Vertical Venting, Cdvxt Top Vent Baffle

CDVX Series Direct Vent Gas Fireplace

36CDVXT Vertical Venting

How to Use the Vent Graph

The vent chart should be read in conjunction with the following vent installation instructions to determine the relationship of the vertical and horizontal dimensions of the vent system.

1.Determine the height of the center of the horizontal vent pipe exiting through the outer wall. Using this dimension on the Sidewall Vent Graph (Fig. 42), locate the point intersecting with the slanted graph line.

2.From the point of this intersection, draw a vertical line to the bottom of the graph.

3.Select the indicated dimension, and position the fireplace in accordance with same.

Example A:

If the vertical dimension from the floor of the fireplace is 11’ (3.4 m) the horizontal run to the face of the outer wall must not exceed 14’ (4.3 m).

Example B:

If the vertical dimension from the floor of the unit is 7’ (2.14 m), the horizontal run to the face of the outer wall must not exceed 8¹⁄₂’ (2.6 m).

30
29
28
27
26
25
24													to the	Vertical
23
22
21
													center of the horizontal vent pipe	dimension from the floor of the unit
20
19
18
17
16
15
14
13
12										eg: A
11
10
9
8
7							eg: B
6
5
4
3
3	4	5	6	7	8	9	10	11 12	13 14	15 16	17 18	19	20

Horizontal dimension from the outside face of the

wall to the center of the fireplace vent flange

Sidewall vent graph showing the relationship between vertical

and horizontal dimensions for a Direct Vent flue system.

Fig. 42 Sidewall venting graph. (Dimensions in feet)

36 CDVXT Top Vent Baffle

The 36CDVXT is shipped with a restrictor installed in the unit. This allows for a better flame when installing a vertical venting configuration. Below is a rough esti- mate of opening positions based on vent length. This is a guide. More fine tuning can be done by a qualified installer. Adjust the restrictor so there is no lifting of the flame from the burner tube and the flame is not dirty to create soot.

To adjust:

1.Loosen the two (2) screws securing the flue baffle. (Fig. 43)

2.Remove two (2) screws from either side of the flue box. (Fig. 43) Adjust the restrictor. (Fig. 44)

3.Tighten the screws in the flue baffle and insert the two (2) screws removed earlier through the slots in the restrictor.

Flue Box Flue Pipe

Remove Screws from Either side

Flue Baffle

Loosen

Screws

FP1797

Fig. 43 Loosen screws securing flue baffle.

Restrictor

X

Up to 10’ (3 m) X = 1Z\x” (38 mm)

10’ to 40’ (12 m) X = 1Z\v” (32 mm)

FP1799

Fig. 44 Adjust the restrictor for best flame appearance.

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