DVBR Series Direct Vent Gas Fireplace
3 x 90° | 3 x 90° |
Elbows | Elbows |
FP1176 |
|
Fig. 26 | Maximum three (3) 90° elbows per installation. |
| 36" |
| (914mm) |
| Max. |
| 36" |
| (914mm) |
| Max. |
| FP1177 |
Fig. 27 | Maximum horizontal runwith no rise. |
•If a 90° elbow is used in the horizontal vent run (level height maintained) the horizontal vent length is reduced by 36” (914mm). (Fig. 28, 29) This does not apply if the 90° elbows are used to increase or redirect a vertical rise. (Fig. 26)
Example: According to the vent graph (Page 15) the maximum horizontal vent length in a system with a
7¹⁄₂” (191mm) rise is 20” (508mm) and if a 90° elbow is required in the horizontal vent it must be reduced to 17’ (5.2m).
90o
AB
A + B = 17' (Max.)
7'6"
FP1178
Fig. 28 Horizontal run reduction.
|
| 7’ |
| A | (178cm) |
|
| |
| 10’ |
|
| (254cm) | B |
|
| |
| A + B = 17’ Max. |
|
8’ |
|
|
(244cm) |
| |
|
| |
Fig. 29 | Maximum vent run with elbows. |
|
In Figure 28 & 29, dimension A plus B must not be greater than 17’ (5.2m)
•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” (457mm). 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. 30)
Example:
Elbow 1 | = | 90° |
Elbow 2 | = | 45° |
Elbow 3 | = | 45° |
Elbow 4 | = | 90° |
Total angular variation | = | 270° |
| 1 + 2 + 3 + 4 = 270° |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 4 |
FP1180
Fig. 30 Maximum elbow usage.
16 | 20000584 |
