Évaluations - 3, GPA: 4
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Facilité d'utilisation
EXPANSION OIL RLTER TANK FRESH AIR FOR COMBUSTION Be sure to provide enough fresh air for combustion. Enough air ensures proper WARNING combustion and assures that no hazard will develop due to the lack of oxygen. If you use a fireplace or a kitchen or a bathroom exhaust fan, you should install an I NOTE [ outside air intake. These devices will rob the boiler and water heater of combustion air. You must provide enough flesh air to assure proper combustion. The fire in the boiler uses oxygen. It must have a continuous supply. The air in the house contains only enough oxygen to supply the burner for a short time. Outside air must enter the house to replace the air used by the burner. Study the following examples 1 and 2 to determine your fresh air requirements. EXAMPLE 1: Boiler Located in Unconfined Space If your boiler is in an open area (unpartitioned basement) in a conventional house, the air that leaks through the cracks around the doors and windows will usually be adequate to provide air for combustion. The doors should not fit tightly. Do not caulk the cracks around the windows. An unconfined space is defined as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour of the total input rating of all appliances installed in that space. EXAMPLE 2: Boiler Located in Confined Space A. All Air from Inside the Building: The confined space shall be provided with two permanent openings communicating directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an unconfined space. The total input of all combustion equipment installed in the combined space shall be considered in making this determination. Each opening shall have a minimum free area of one square inch per 1,000 Btu per hour of the total input rating of all combustion equipment in the confined space, but not less than 100 square inches. One opening shall be within 12 inches of the top and one within 12 inches of the bottom of the enclosure. Example: Your boiler is rated at 100,000 Btu per hour. The water heater is rated at 30,000 Btu per hour. The total is I30,000 Btu per hour. You need two grilles, each with 130 square inches of FREE opening. Metal grilles have about 60% FREE opening. To find the louvered area needed, multiply the free opening required by 1.7 (130 x 1.7 = 221.0 sq. in. louvered area). In this example, two grilles each having an 8" x 30" (24-0 sq. in.) louvered area would he used. AIR OPENINGS FOR BOILER LOCATED IN CONFINED SPACE (CLOSET OR UTILITY ROOM) VENTILATING I GRILLE 1 I I I I' COMBUSTION AIR GRILLE 6 B. All Air from Outdoors: The confined space shall be provided with two permanent openings, one commencing within 12 inches of the top and commencing within 12 inches of the bottom of the enclosure. The openings shall communicate directly, or by ducts, with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors. 1. When directly communicating with the outdoors, each opening shall have a minimum free area of one square inch per 4,000 Btu per hour of total input rating of all equipment in the enclosure. 2. When communicating with the outdoors through vertical ducts, each opening shall have a minimum flee, area of one square inch per 4,000 Btu per hour of total input rating of all equipment in the enclosure. 3. When communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of one square inch per 2,000 Btu per hour of total input rating of all equipment in the enclosure. 4. When ducts are used, they shall be of the same cross-sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be not less than three inches. FRESH AIR FRESH AIRDUCTCAPACITIESFORDUCTSSUPPLYINGFRESH _RTOBOILERINTIGHTLY CONSTRUCTED HOUSES Fresh Air ." Mesh Screen Wood Louvers Metal Louvers Duct Size (Btuh)* (Btuh)* (Btuh)* 3J/2 '" x 12" 144,000 36,000 108,000 8" x 8" 256,000 64,000 192,000 8" x 12" 384,000 96,000 288,000 8"x 16" 512,000 128,000 384,000 *Btuh = British Thermal Units per hour based on opening covered by ." mesh screen, wood louvers, or metal louvers. SYSTEM PIPING I. When the installation of the boiler is for a new heating system, first instal! all of the radiation units (panels, radiators, baseboard, or tubing) and the supply and return mains. After all heating system piping and components have been installed, make final connection of the system piping to the boiler. It is recommended to mount the circulating pump on the supply side piping, such that it pumps away from the expansion tank. Refer to the figures on the next pages. 2. A hot water boiler installed above radiation level must be equipped with a low water cut off device. A periodic inspection is necessary, as is flushing of float type devices, per low water cut off manufacturers specific instructions. . The packaged boiler unit is set up with 1-1/4" NPT supply and return pip...
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