Screw
Screws
Flex Vent 
Collar
FP1605
Fig. 19 Secure collar in place, slide termination into collar.
Rear Wall Vent Application
*Exterior Outside Wall 20” - 32” (508 - 813 mm)
From Rear of Unit *
1.Determine where the termination is to be installed. (Fig. 20)
2.Locate the hole 27¹⁄₄” (692 mm) off the floor. This is the center line of the termination. Refer to “Rear Wall Installation Twist Lock Pipe” section.
Screw
Screws
Flex Vent
Collar | 27���” | |
| ||
| (692 mm) | |
20” - 32” |
|
|
|
| |
(508 - 813 mm) |
| FP1605a |
|
| |
Fig. 20 The centerline of the termination must be 27¹⁄₄” (692 mm) off the floor.
3.Mount the flex pipe assembly to the fireplace collars and twist the collar that the flex pipe is attached to onto the fireplace.
4.Once the collar is twisted onto the fireplace collar, secure with a screw through the tab. (Fig. 15)
5.While sliding the fireplace into position, lift up the end of the flex pipe and slip it through the firestop. *Be careful not to extend the flex too much. The flex pipe needs to have an immediate rise before going hori- zontal. 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 termi- nation and house cladding.
20010175
CDV Series Direct Vent Gas Fireplace
Vertical Sidewall Applications
Since it is very important that the vent- ing system maintain its balance between the combustion 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 deter- mine the various dimensions allowable.
Minimum clearance between vent pipes and combustible 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 portion of the vent assembly.
•The maximum horizontal vent run is 20 ft. (6.1 m) when the vertical vent rise is 7¹⁄₂ ft. (2.3 m). (Fig. 21)
•The maximum number of 90° elbows per side wall installation is three (3).
Vertical Dimension | Maximum |
| |
20 ft. (6.1m) |
| ||
7¹⁄₂’ Minimum When |
| ||
| 48" | ||
Horizontal Run is |
| ||
12" | (1.2m) | ||
20’ | |||
(305mm) |
|
15ft.
(4572mm)
7.5' | 7TCDV90 |
(2.3m) | or |
| |
| 7TDV90 |
CFM141
Fig. 21 Maximum number of 90° elbows 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. 22) This does not apply if the 90° elbows are used to increase or redirect a vertical rise. (Fig. 23) Example: According to the chart the maximum hori- zontal vent length in a system with a 7.5’ (2.3 m) ver- tical rise is 20’ (6 m) and if a 90° elbow is required in
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