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Model | Certified | Vent | Maximum | Combustion Air |
| Air Inlet |
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Horizontal | Max. Length** (ft) | |||||||
No. | Vent | Size | Vent Length | Intake Pipe |
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6” Ø | 8” Ø | 10” Ø | ||||||
503 | Material | (in.) | (ft) | Material | ||||
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753 |
| 6 |
| Galvanized Steel, | 45 | 100t |
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1003 |
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Category IV |
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| PVC, |
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1253 |
| 75 | ABS, |
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| CPVC |
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1503 |
| 8 |
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| 45 | 85t | ||
1753 |
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2003 |
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**Subtract 10 ft per elbow. Max. 4 elbows. t Adapters supplied by others.
The vent must be installed to prevent flue gas leakage. Care must be taken during assembly to ensure that all joints are sealed properly and are airtight. The vent must be installed to prevent the potential accumulation of condensate in the vent pipes. It is required that:
1.The vent must be installed with a condensate drain located in proximity to the heater as directed by the vent manufacturer.
2.The vent must be installed with a slight upward slope of not less than 1/4 inch per foot of horizon- tal run to the vent terminal.
3.The vent must be insulated through the length of the horizontal run.
Termination
The flue direct vent cap MUST be mounted on the ex- terior of the building. The direct vent cap cannot be installed in a well or below grade. The direct vent cap must be installed at least 1 ft above ground level and above normal snow levels. The
WARNING: No substitutions of flue pipe or vent cap material are allowed. Such substitutions would jeopardize the safety and health of inhabitants.
Direct
Fig. 28: Direct Vent - Vertical
CAUTION: This venting system requires the installation of a condensate drain in the vent piping per the vent manufacturer’s instructions. Failure to install a condensate drain in the venting system will void all warranties on this heater.
Installation
These installations utilize the
28
