VENTING INSTALLATION | LX Series Direct Vent Gas Fireplace |
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3 x 90° |
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Elbows |
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| B: 7’ |
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| A: 10’ | |
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3 x 90° |
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| Horizontal 90° Elbow = 3' Reduction | |
Elbows |
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| A + B = 17' Maximum |
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| 7’6” |
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Figure 20 - |
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Maximum Three (3) 90° Elbows |
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| Figure 22 - | |
Per Installation |
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| Maximum Vent Run with Elbows | |
| FP1176 |
| FP1959 | 90° | |
36" |
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(914 mm) |
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Max. |
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| A | B |
| 36" |
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| (914 mm) |
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| Max. |
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Figure 21 - |
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| 7’6” |
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| (2.3 m) | |
Maximum Horizontal Run with No Rise | FP1177 |
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Example: According to the vent graph (Page 16) the |
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| Figure 23 - | ||
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| Horizontal Run Reduction | |||
maximum horizontal vent length in a system with a 7.5' |
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FP2717 |
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vertical rise is 20’ (6 m). If a 90° elbow is required in the |
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horizontal vent it must be reduced to 17' (5.2 m). |
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In Figures 22 and 23, Dimension A plus B must not be |
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greater than 17' (5.2 m). |
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• The maximum number of 45° elbows permitted per side | 1 + 2 + 3 + 4 = 270° |
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wall installation is two (2). These elbows can be installed |
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in either the vertical or horizontal run. |
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• For each 45° elbow installed in the horizontal run, the | 1 |
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length of the horizontal run MUST be reduced by 18" | 2 |
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(457 mm). This does not apply if the 45° elbows are |
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installed on the vertical part of the vent system. |
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| 4 |
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• The maximum number of elbow degrees in a system is |
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270°. Figure 24 |
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Example: | Elbow 1 | = | 90° |
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| Elbow 2 | = | 45° |
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| Elbow 3 | = | 45° |
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| Elbow 4 | = | 90° | Figure 24 - |
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Total Angular Variation | = | 270° | Maximum Elbow Usage | ||
51D0528 | 19 |
