| Vent Opening for Combustible Wall |
| 9³⁄₈” |
| (240mm) |
10³⁄₈” | |
(265mm) | |
| Framing Detail |
| Vent Opening for Noncombustible Wall |
| 7¹⁄₂” |
| (190mm) |
| |
Fig. 18 | Locate vent opening on rear wall. |
| Maximum |
| Length |
| 12” (305mm) |
#8 Screws (2)
#8 Screws (2) |
| Firestop |
Zero Clearance |
|
|
Sleeve |
|
|
| Zero Clearance |
|
CFM135a | Sleeve | Side View |
Fig. 19 Adjustable zero clearance sleeve.
STEP 3
Measure the horizontal length requirement for the vent- ing including a 2” (51 mm) overlap, i.e. from the elbow to the outside wall face plus 2” (51 mm), or the distance required if installing a second 90˚ elbow. (Fig. 20)
STEP 4
Install the 4” (102 mm) vent to the appliance collar and secure with three (3) sheetmetal screws. Install the 7” (178 mm) vent pipe to the appliance collar and secure with three (3) sheetmetal screws. It is not neces- sary to seal this connection.
It is critical there be no downward slope away from the appliance when connecting the vent or elbow.
360DVS Series Direct Vent Fireplaces
STEP 5
Guide vent through the vent hole as you place the appli- ance in its installed position. Guide the 4”
(102 mm) and 7” (178 mm) collars of the vent termina- tion into the outer ends of the venting.
Do not force the termination. If the vent pipes do not align with the termination, remove and realign the vent- ing at the appliance flue collars.
Attach the termination to the wall as outlined in the instruction sheet supplied with the termination.
Vertical Sidewall Application
It is very important the venting system maintain its bal- ance between the combustion air intake and the flue gas exhaust, certain limitations concerning vent con- figurations must be strictly adhered to.
•The vent graph (Fig. 16), showing relationship be- tween vertical and horizontal side wall venting, will help determine allowable dimensions.
•Minimum clearance between vent pipes and com- bustible materials is 1” (25 mm) on top, bottom, and sides, unless otherwise noted.
•When the vent termination exits through foundations less than 20” (508 mm) below siding outcrop, the vent pipe must flush up with the siding.
•It is 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 fire- place to the face of the outer wall.
NOTE: When installing the appliance as a rear vent unit, the 90˚ transition elbow attached directly to the rear of the unit is not included in the following criteria and calculations. Unless it is specifically mentioned, this elbow should be ignored when calculating venting layouts.
| FP1435 |
Fig. 20 | Maximum three (3) 90° elbows per installation. |
10006326 | 17 |