INLET/OUTLET VENT TERMINATIONS
Standard Horizontal Termination
When 3 inch pipe is used between the water heater and the outside wall, reduce it to 2 inch pipe before penetrating the wall. A maximum of 18 inches (45.7 cm) of 2 inch pipe may be used between the 3 inch transition and the inside of the wall (see figure 7).
The standard horizontal air inlet termination is a 2 inch pipe which terminates at the exterior wall and utilizes a coupling to prevent the pipe from being pushed back into the structure. The standard horizontal exhaust outlet termination is a 2 inch pipe which terminates 12 inches (30.5 cm) from the outside wall. The air inlet must be located with respect to the exhaust outlet as shown in figure 7 (bottom).
Install a drain tee assembly and trap in the inlet vent as close to the water heater as possible. This is to drain any water that may be in the combustion air pipe and prevent it from entering the blower. Connect the trap drain line to a suitable drain or downstream of the condensate trap of the water heater.
Note: See “Venting Additional Polaris® Units” on Page 11 for correct terminations if installing more than one Polaris® gas water heater.
Alternative Horizontal Termination
The combustion air and exhaust terminations may be raised up to 24 inches (61 cm) above the wall penetrations if required for anticipated snow levels (see figure 8). The two elbows shown in figure 8 are considered part of the termination and should not be included when determining the maximum allowable vent pipe length.
Note: See “Venting Additional Polaris® Units” on Page 11 for correct terminations if installing more than one Polaris® gas water heater.
Figure 8: Alternate Horizontal Termination | |
.5cm) |
|
(30 |
|
24” |
|
(61 cm) |
|
Max. |
|
(76. |
|
2 | cm) |
| |
Figure 7: Standard Horizontal Termination
3” (7.6cm) Max. |
|
4”(10cm) | 12” (30.5 cm) |
Max. |
|
4”(10cm) | 2” |
Max. | Coupling |
| 12” (30.5cm) Min. Above |
| Grade or Anticipated |
| Snow Level. See |
Notes: | Note 4. |
1.Support Horizontal Pipe Every Four Feet (1.2 m). Support Vertical
Pipe Every Six Feet (1.8 m).
2.When Using 3 Inch Pipe, Reduce To 2 Inches Before Penetrating The Outside Wall.
3.18 Inch (45.7 cm) Maximum When Using 3 Inch Pipe.
4.Increase The 12 Inch (30.5 cm) Minimum Above Grade To Keep Terminal Openings Above Anticipated Snow Levels.
5.Slope All Piping Down Toward the Water Heater as
Follows:
´3LSLQJ VORSH´3HU)RRW PPSHUPHWHU
´3LSLQJ VORSH´3HU)RRW PPSHUPHWHU
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