An application note describing how AquaStar 240FX Installation Requirements is used in practice.
Installation Info for the AquaStar 240FX Water Heater
Follow information provided on this page. Installation and service must be performed by a qualified installer, service agency or the gas supplier.
- Required clearances for OUTDOOR INSTALLATION
| MODEL 240FX | OUTDOOR INSTALLATION |
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| TOP | 36" |
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| FRONT | 24" (maintenance space) |
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| BACK | 1" |
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| PIPING SIDE | 12" |
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| NON PIPING SIDE | 6" |
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| GROUND | 3" off ground on non-combustible base |
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- Required clearances for INDOOR INSTALLATION
| MODEL 240FX | INDOOR INSTALLATION |
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| TOP | 11" |
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| FRONT | 4" (24" suggested for maintenance space only) |
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| BACK | 1" |
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| PIPING SIDE | 6" |
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| NON PIPING SIDE | 2" |
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| FLOOR | Non-combustible base |
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- Gas & Venting for the 240FX
| Gas | 5/8" | 3/4" | 7/8" | 1" |
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| Liquid Propane | Not Recommended | 35 feet | 70 feet | |
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| Natural Gas | | 25 feet | | 80 feet |
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| Venting | Min. Diameter | Max. Vertical or Horizontal run | Max. number of elbows | Rule |
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| 4 inches | 21 feet | 3 | Deduct 5ft. for each elbow from max. vent length |
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| Height | Width | Depth | Weight |
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| 27" | 16.5" | 8.3" | 65 lbs.(shipping weight) |
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- Combustion Air Required (Indoor Installations)240FX
In order to ensure an adequate supply of combustion air, the National Fuel Gas Code requires that any conventional vented gas appliance be installed in a room with a minimum volume of 50 cubic feet per 1,000 Btu/hr rated input. The following is the minimum size of the open space in which the 240FX may be installed in compliance with this requirement
| Model | Volume | Area with an 8' ceiling |
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| 240FX | 8,250 cubic feet | 1,031 square feet |
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If the 240FX is installed in an area smaller than indicated above, then the installer must make special provisions for combustion air in the form of two openings, each one within 12" of the top and 12" of the bottom of the space, having a total free area of 1 square inch per 1,000 Btu/hr of rated input if the air is taken from inside the house (two 13" x 13" openings). This requirement reduces to 1 square inch per 4,000 Btu/hr if the air is taken from the outside (two 6.5" x 6.5" openings). Note This calculation assumes normal rates of "infiltration" of outside air. A super-insulated, super-tight space/building may require outside air for the 240FX even though the volume/area of the space meets this application. Caution In addition to the above, the 240FX must be properly vented to ensure safe and efficient operation.
