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Фрагмент инструкции
(see Fig. 3) For proper heater support, the maximum distance between clamps must not exceed 48”. On extra-long heaters, more than two clamps are furnished. 2 / "15162 / "383 / "1116Figure 2 Figure 3 2. Mounting Holes — When heaters are mounted adjacent to each other in the same plane, the minimum distance will depend on whether the wiring to the center element enters the terminal box through the connector furnished or through a right angle connector (not furnished). 3. Framing — Where an extensive installation is being made, the use of continuous slot metal framing manufactured by several concerns will be of assistance in saving time and money. The framing is reusable. Mounting FrameReflectorSpacer SheetInsulationFigure 4 4. Reflector Spacer Sheets — Where heaters are not mounted side by side (see Fig. 4), reflector spacer sheets can be used between heaters. These reflector spacer sheets and companion reflectors consisting of an extruded aluminum housing with reflector sheet and mounting clamps are available. Check factory or local Chromalox Sales and Application Engineers. 5. Insulation — Where unusually high work temperatures are encountered, it may be desirable to insulate with high temperature insulation. Note: An air space should be left between backs of heaters and insulation. (see Figure 4) 6. Ventilation — Where solvents, water, etc. are being evaporated from work in process, it is necessary to provide substantial quantities of ventilation air to carry away the resulting vapors. IMPORTANT – In the case of solvents of an explosive nature, ventilation air must be in sufficient volume to dilute the solvent vapor so that explosive mixtures cannot occur. In order to comply with the standards of safety required by the insurance companies, ventilation protection and other facilities must be in accordance with NFPA Bulletin No. 86, entitled “Standard for Ovens and Furnaces”. This Bulletin may be obtained from the Association at 470 Atlantic Avenue, Boston Mass., 02110 FIRE/EXPLOSION HAZARD. This heater is not intended for use in hazardous atmospheres where flammable vapors, gases, liquids or other combustible atmospheres are present as defined in the National Electrical Code. Failure to comply can result in personal injury or property damage. 2 WIRING ELECTRIC SHOCK HAZARD. Disconnect all power before installing or servicing heater. Failure to do so could result in personal injury or property damage. Heater must be installed by a qualified person in accordance with the National Electrical Code, NFPA 70. ELECTRIC SHOCK HAZARD. Any installation involving electric heaters must be performed by a qualified person and must be effectively grounded in accordance with the National Electrical Code to eliminate shock hazard. 1. The power supply voltage should be the voltage as specified on the heater nameplate located on the heater housing. 2. Wiring should be run in flexible or rigid metal conduit and must be installed in accordance with the requirements of the National Electrical Code and such other local requirements as may be applicable. Note: High temperatures will oxidize copper. Do not use copper wire in connecting this heater. Nickel-plated copper wire, insulated in accordance with requirements for temperature and voltage is recommended. 3. A sufficient length of this wire (not less than 12”) should be used to extend from each heater terminal into a connection box location where the temperature does not exceed 300°F. 4. ELECTRICAL CONNECTIONS — A. End Elements Electrical connection to the heater end elements is made through the 7/8” dia. opening in the end of the terminal cover of the element assembly. A 1/2” flexible conduit connector is provided with each element assembly for this purpose. B. Center Elements Electrical connection to the heater center element is made through the 7/8” dia. opening in the 4” octagon conduit box for the element assembly. A 1/2” flexible conduit connector is provided with each element assembly for this purpose. 5. ACCESS TO TERMINALS A. End Elements Access to the end element terminals is obtained by removing the mounting bolt, nut and spacer (see Figure 9, items 9, 16 and 18) and sliding the terminal end of the element assembly out of the housing. B. Center Elements Access to the center mounted element terminals is obtained by removing the terminal box cover. 6. END ELEMENT TERMINAL ASSEMBLY Assemble end terminal, screw and wire as shown in Figure 5. Hold terminal with pliers and tighten the terminal screw securely with a screwdriver. Figure 5 — End Element Terminal Assembly 7. CENTER ELEMENT TERMINAL ASSEMBLY Assemble center terminal, washers, nut and wire as shown in Figure 6. Hold terminal with pliers and tighten the terminal nut securely with a wrench. Figure 6 — Center Element Terminal Assembly CAUTION: Terminal clip is spot-welded to element terminal pin and over-tightening terminal screw may break the weld or shear off terminal pin. However, either the screw or nut should ...