WW-F-2743A
3.16.3 Draft regulator. When specified (see 6.2), a barometric draft regulator shall be furnished for oil-fired units. The regulator shall be adjustable to encompass a range of settings from
0.2 to 0.08 (0.0508 to 0.2032 mm) of an inch of water and shall meet the requirements of
UL 378. When both vent connections and a draft regulator are specified in the contract, the draft regulator shall be mounted in a tee-section. Otherwise, the regulator shall be furnished separately for mounting at the site.
3.17 Treatment and painting. Unless otherwise specified (see 6.2), the parts shall be treated and painted in accordance with the manufacturer's standard practice. All surfaces of the parts other than corrosion-resisting steel shall be protected against corrosion and present a neat appearance.
3.18 Lubrication. Unless otherwise specified (see 6.2), means for lubrication shall be in accordance with the manufacturer's standard practice. The lubricating points shall be easily visible and accessible. Hydraulic lubrication fittings shall be in accordance with SAE J 534. Where use of high pressure lubricating equipment, 1000 pound-force per square inch
(6 895 kilopascal) or higher, will damage grease seals or other parts, a suitable warning shall be affixed to the equipment in a conspicuous location.
3.19 Identification marking. Identification shall be permanently and legibly marked directly on the furnace or a plate securely attached to the furnace at the source of manufacturer. The identification plate shall conform to ANSI Z21.47. Identification marking shall include manufacturer's name, model number and serial number of the furnace.
3.20 Instruction plates. The equipment shall be provided with instruction plates describing
special or important procedures for operating and servicing equipment and warnings of hazardous procedures. Instruction plates shall comply with the provisions of ANSI Z21.47, ANSI Z83.8,
UL 727, UL 731 or UL 795, as applicable.
3.21 Workmanship.
3.21.1 Steel fabrication. The steel used in fabrication shall be free from kinks, sharp bends, and other conditions which would be deleterious to the finished product. Manufacturing processes shall not reduce the strength of the steel to a value less than intended by the design. Manufacturing processes shall be done neatly and accurately. All bends shall be made by controlled means to ensure uniformity of size and shape.
3.21.2 Bolted connections. Bolt holes shall be accurately punched or drilled and shall have the burrs removed. Washers or lockwashers shall be provided in accordance with good commercial practice, and all bolts, nuts, and screws shall be tight.
3.21.3 Welding. Welding procedures shall be in accordance with a nationally recognized welding code. The surface of parts to be welded shall be free from rust, scale, paint, grease, or other foreign matter. Welds shall be of sufficient size and shape to develop the full strength of the parts connected by the welds. Welds shall transmit stress without permanent deformation or failure when the parts connected by the weld are subjected to proof and service loading.
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