17
CDVZ Series Direct Vent Gas Fireplace
20014621
needs to have an immediate rise before going horizon-
tal.
NOTE:
Be careful not to distort the outer flex as this
will affect the performance of the fireplace.
6. Secure the collar to the firestop by bending the tab out
on the firestop and running a screw through the tab
and collar.
7. From outside the house, slide the termination onto the
collars sticking through the firestop.
8. Secure the termination to the house with the four (4)
screws provided. Be sure to seal around the termina-
tion and house cladding.
Vertical Sidewall Applications
Since it is very important that the venting sys-
tem maintain its balance between the com-
bustion air intake and the flue gas exhaust,
certain limitations as to vent configurations
apply and must be strictly adhered to.
The Vent Graph shows the relationship between
vertical and horizontal side wall venting and will help to
determine the various dimensions allowable.
Minimum clearance between vent pipes and combus-
tible materials is 1” (25 mm) on top, bottom
and sides unless otherwise noted.
When vent termination exits through foundations
less than 20” below siding outcrop, the vent pipe
must flush up with the siding. It is always best to locate
the fireplace in such a way that minimizes the number of
offsets and horizontal vent length.
The horizontal vent run refers to the total length of vent
pipe from the flue collar of the fireplace to the face of the
outer wall.
Horizontal plane means no vertical rise exists on this por-
tion of the vent assembly.
•
The maximum horizontal vent run is 20 ft. (6.1 m) when
the vertical vent rise is 7
¹⁄₂
ft. (2.3 m). (Fig. 26)
•
The maximum number of 90° elbows per side wall
installation is three (3).
•
If a 90° elbow is used in the horizontal vent run (level
height maintained) the maximum horizontal vent length
is reduced by 36” (914 mm). (Fig. 27) This does not
apply if the 90° elbows are used to increase or redirect
a vertical rise. (Fig. 28)
Example:
According to the chart the maximum hori-
zontal vent length in a system with a 7.5’ (2.3 m) vertical
V584-201
Horizontal Run
2/99 djt
10 ft.
(3048 mm)
7 ft. 6 in.
(2286 mm)
7 ft.
(2134 mm)
A
B
CFM147
Fig. 28
Maximum vent run with elbows.
90° Elbow = 3 ft.
A + B = 17 ft. (Max.)
Maximum
3' (914mm)
CFM142
Venting
2/2/01 sta
CFM142
Fig. 27
Maximum horizontal vent run.
7TCDV90
rise is 20’ (6 m) and if a 90° elbow is required in the
horizontal vent it must be reduced to 17’ (5.2 m). In
Figure 28 Dimension A plus B must not be greater than
17’ (5.2 m).
•
The maximum number of 45° elbows permitted per side
wall installation is two (2). These elbows can be installed
in either the vertical or horizontal run.
•
For each 45° elbow installed in the horizontal run, the
length of the horizontal run MUST be reduced by 18” (45
cm). This does not apply if the 45° elbows are installed
on the vertical part of the vent system.
•
The maximum number of elbow degrees in a system is
270°. (Fig. 29)
•IMPORTANT•
Minimum clearance between vent pipes
and combustible materials is one (1”) inch (25 mm) on bot-
CFM141
2/2/01 sta
Maximum
20 ft. (6.1m)
7.5'
(2.3m)
Vertical Dimension
7
¹⁄₂
’ Minimum When
Horizontal Run is
20’
CFM141
Fig. 26
Maximum number of 90° elbows is three (3).
7TCDV90
7TDV90
