WARNING
VENT TERMINATION MUST NOT BE WITHIN 4 FEET (122 cm)
OFANYITEMS SUCHAS GAS METERS, GAS VALVES OR OTHER GAS REGULATING EQUIPMENT.
WIRE FENCE
When the water heater outlet terminal is low enough to be touched accidentally, or is accessible to small children, a wire mesh chain link fence (as show in Figure 7) may be used. Care should be taken to maintain adequate ventilation around the outlet terminal. If a chain link fence is installed, it must not be used as a storage area for items that may block proper ventilation.
FIGURE 7.
Venting Through Roof - Clearances
•0" clearance for 3" PVC, ABS, or CPVC Schedule 40 piping from combustible and noncombustible surfaces.
•The vent exhaust outlet and air inlet terminals shall terminate at least 18 inches (45.7 cm) above the roof surface, see Figure 8.
•The venting system must be installed in a manner which allows inspection of the installation of the venting pipes and joints as well as periodic inspection after installation as required by ANSI Standards.
AIR FOR VENTILATION FOR APPLIANCES
LOCATED IN CONFINED SPACES
Air for ventilation should be provided if installed in a confined space. Refer to the National Fuel Gas Code, ANSI Z223.1.
FIGURE 9.
Horizontal runs must be securely supported at 3 1/2 foot (8.9 cm) intervals and vertical runs supported at 5 foot (1.5 cm) intervals.
VENTING THROUGH AN OUTSIDE WALL
A. ALL 75 GAL. (283.9L) 65,000 & 70,000 BTU/HR MODELS & 50 GAL.(189.3L)60,000 & 65,000 BTU/HR MODELS, SEE FIGURE 10.
In the carton is supplied:
1.Two 3" inlet and outlet PVC Schedule 40 - 45° vent caps.
2.A 3" ABS Schedule 40 - 90° street elbow; used to connect the outlet vent pipe to the water heater when the outlet vent pipe is to be turned horizontally directly off the blower.
3.A 5' (1.52 m) section of 3" ABS Schedule 40 outlet vent pipe (more may be required and must be supplied locally).
FIGURE 10. HI BTU MODELS.
| 1. | The water heater requires its own (separate) venting system. |
| 2. | Only 3" ABS Schedule 40 piping & fittings are acceptable |
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| materials on the first 5' of outlet vent system. This applies to only 50 |
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| gal. (189.3 L) Hi BTU input models and all 75 gal. (283.9 L) models. |
| 3. | 3" PVC, ABS, or CPVC Schedule 40 piping & fittings are |
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| acceptable materials for the inlet vent system and for the |
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| outlet vent system after the first 5' (1.52 m). |
| 4. | It cannot be connected to existing vent piping or chimney. |
| 5. | When venting through an outside wall, the vents must |
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| terminate horizontally to the outdoors. |
| B. ALL 50 GAL.(189.3L) 38,000 AND 40,000 BTU/HR MODELS & 40 | |
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| GAL.(151.4L)36,000 & 40,000 BTU/HRMODELS,SEE FIGURE 11. |
| In the carton is supplied: | |
| 1. | Two 3" inlet and outlet PVC Schedule 40 - 45° vent caps. |
FIGURE 8. | All other piping must be supplied by the supplier. | |
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