Initial Installation
QUALIFIED INSTALLERS ONLY
PLANNING YOUR INSTALLATION:
When planning your installation, it will be necessary to select the proper length of vent pipe for your particular requirements. It is important to note when passing through a wall, the maximum allowable wall thickness is 10 inches (25.4 cm), 11⁄2 inches (3.8 cm) clearance to combustibles must be maintained. Select the amount of vertical rise desired for
| for sufficient vent height above the roof line. For two | |||||
Round Support | story applications, a fire stop is required at each floor | |||||
Box/Wall Thimble | level. If an offset is needed in the attic, additional pipe | |||||
| and elbows will be required. To connect the venting | |||||
| system to the appliance flue outlet, a | |||||
| is built into the appliance at the factory. Refer to ‘Vent | |||||
Horizontal | Configuration | and | Restrictor | Settings’ | for | venting |
Termination | parameters. |
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Pipelength | Your total vent pipe length must be within the shaded | |||||
| area of Figure 12. If a 90° elbow is used in the | |||||
90° Elbow | horizontal plane, 36” (91.4 cm) must be subtracted | |||||
| from the allowable horizontal run. |
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| There are three (3) basic types of Direct Vent System | |||||
| installations. The three (3) types of installations are | |||||
| shown in Figures 13 through 15. |
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Pipelength |
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| Vertical |
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| Termination |
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Figure 13: Common Horizontal Installation. |
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| Storm Collar |
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| Flashing |
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36" (915 mm) |
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Snorkel |
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| Ceiling Firestop | ||
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| Round Support |
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Round Support | Box/Wall Thimble |
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Box/Wall Thimble |
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| Cathedral Ceiling | ||
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| Support Box | ||
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| Pipelength |
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2 ft (610 mm) |
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Pipelength |
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45° Elbow |
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Figure 15: Common Snorkel Installation. | Figure 14: Common Vertical Installation. |
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