22
CDVZ Series Direct Vent Gas Fireplace
20014621
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 8
¹⁄₂
’ (2.6 m).
36CDVZT Vertical Venting
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.
Vertical dimension from the floor of the unit
to the center of the horizontal vent pipe
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
eg: A
eg: B
CFM102
DV Graphic
9/28/00 sta
Fig. 42
Sidewall venting graph. (Dimensions in feet)
36 CDVZT Top Vent Baffle
The 36CDVZT is shipped with a restrictor installed in the
unit. This allows for a better flame when installing a verti-
cal venting configuration. Below is a rough estimate of
opening positions based on vent length. This is a guide.
More fine tuning can be done by a qualified installer. Ad-
just 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.
&0
#$684BAFFLE
Loosen
Screws
Flue Baffle
Flue Pipe
FP1797
Fig. 43
Loosen screws securing flue baffle.
Remove Screws
from Either side
Flue Box
X
FP1799
CDVXT restrictor
4/07
Restrictor
FP1799
Fig. 44
Adjust the restrictor for best flame appearance.
Up to 10’ (3 m) X = 1
¹⁄₂
” (38 mm)
10’ to 40’ (12 m) X = 1
¹⁄v
” (32 mm)
