Évaluations - 2, GPA: 3.5
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Facilité d'utilisation
4 2) When the boiler is installed in a confined space such as a utility room or closet (Models 0030,0042 and 0066 only), where all air is supplied from inside the building, the boiler room must be provided with two openings, each one having a minimum net free area, in square inches as follows: Model Sq. In. of Free Area 0030, 0042 & 0066 100 One opening shall be within 12" of the top, and the other opening within 12" of the floor. If additional gas appliances are installed in the same space, the total input of all gas appliances installed in the same space, must be considered in the calculation. Refer to Sec. 5.3.5 of the latest edition of the National Fuel Gas Code for additional requirements. Fig. #8198.0 NOTE: If louvers, grills or screens are used on the openings, obtain the net free area requirements from their supplier or manufacturer. If the design free area of a louver is not known nor available, it shall be assumed that woodlouvers will have 20-25 percent free area and metal louvers will have 60-75percent free area as shown in Sec. 5.3.5 National Fuel Gas Code. 3) If the boiler room is located against an outside wall and air openings can communicate directly with the outdoors, the two openings on the outside wall must each have a net free area as follows: Model (Sq. In.) Net Free Area 0030 & 0042 12 0066 18 0090 24 0135 35 0180 45 Location of the openings is the same as in the previous case - that is, within 12" of the top, and within 12" of the bottom of the enclosure. If horizontal ducts are used, the area must be doubled and the duct area shall not be less than the area of the openings they connect, and in no case shall the smallest dimension be less than 3". VENTING CONNECTIONS These boilers have built-in drafthoods. Vent piping the same size or larger than the drafthood outlet is recommended; however, when the total vent height (drafthood outlet to vent terminal) is at least ten (10) feet, the vent pipe size may be reduced by one size only as specified in Chapter 10 of the latest edition of the National Fuel Gas Code, ANSI Z 223.1. As much as possible, avoid long horizontal runs of vent pipe and too many elbows. If installation requires horizontal runs, the vent pipe must have a minimum of 1/4 inch per foot rise and should be supported at not less than five foot intervals. Maximum vent connector horizontal length shall be 1-1/2 feet (18 inches) for each inch of connector diameter as follows. Model Vent Connector Max Horizontal Diameter Length - FT 30&42 4" 6’ 66&90 5" 7.5’ 135 6" 9’ 180 7" 10.5’ Gas vents supported only by the flashing and extending above the roof more than five feet should be securely guyed or braced to withstand snow and wind loads. We recommend use of insulated vent pipe spacer through the roofs and walls. For protection against rain or blockage by snow, the vent pipe must terminate with a listed vent cap which complies with the local codes or, in the absence of such codes, to the latest edition of the National Fuel Gas Code, ANSI Z 223.1. The discharge opening must be a minimum of two feet vertically from the roof surface and at least two (2) feet higher than any part of the building within ten (10) feet. Vent stack shall be at least five (5) feet in vertical height above the drafthood outlet. The vent cap location shall have a minimum clearance of four (4) feet horizontally from, and in no case above or below, unless a 4-foot horizontal distance is maintained, from electric meters, gas meters regulators and relief equipment. 5 The weight of the vent stack or chimney must not rest on the boiler’s drafthood. Support must be provided in compliance with applicable codes. The boiler top and drafthood must be readily removable for maintenance and inspection. Vent pipe should be adequately supported to maintain proper clearances from combustible construction. Type "B" double-wall (or equivalent vent pipe is recommended. However single-wall metal vent pipe may be used as specified in the latest edition of the National Flue Gas Code ANSI Z 223.1. Lowest Discharge Opening Listed Cap Listed Gas Vent X 12 Roof Pitch is X/12 H - Minimum Height from Roof to Lowest Discharge Opening Roof Pitch H (Min. Ft.) Flat to 6/12 1.0 6/12 to 7/12 1.25 Over 7/12 to 8/12 1.5 Over 8/12 to 9/12 2.0 Over 9/12 to 10/12 2.5 Over 10/12 to 11/12 3.25 Over 11/12 to 12/12 4.0 Over 12/12 to 14/12 5.0 Over 14/12 to 16/12 6.0 Over 16/12 to 18/12 7.0 Over 18/12 to 20/12 7.5 Over 20/12 to 21/12 8.0 Fig.# 8191 WARNING: These boilers must not be connected into any portion of mechanical draft systems operating under positive pressure. To do so may cause the flue products to be discharged into the living space causing serious health injury. 6 boiler to a common chimney must be sized to handle the combined load. Consult available guides for proper sizing of the manifold and the chimney. At no time should the area be less than the area of the largest outlet. For connections to gas vents or chimneys, vent installations ...
Ce manuel est également adapté pour les modèles :Chauffe-eau - 0030B (715.57 kb)
Chauffe-eau - 0135B (715.57 kb)