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Chromalox cannot warrant any electric immersion heater against failure by sheath corrosion if such failure is the result of operating conditions beyond our control. B. Low watt density. C. Steel terminal box painted with heat and acid-resistant paint. D. Lightweight and portable yet heavy-duty. (Weighs only 18 lbs. or less). E. Riser type construction puts the heat at the bottom inducing natural “stirring action” and evenly distributed temperatures. WARNING: Users should install adequate controls and safety devices with their electric heating equipment. Where the consequences of failure may be severe, back-up controls are essential. Although the safety of the installation is the responsibility of the user, Chromalox will be glad to make equipment recommendations. INSTALLATION WARNING: Hazard of Shock. Disconnect all power before installing heater 1. Before installing the type KBL heater, inspect it for possible damage which may have occurred during shipment. Also, check to insure that the line voltage is the same as that stamped on the nameplate. 2. IMPORTANT: Mount heater in the tank so that the liquid level will always be above the effective heated portion of the heater. If the heater is not properly submerged, it will overheat and damage the heating elements and create a possible fire hazard due to excessive sheath temperatures. (See Note 5) 3. Where work will pass over or near equipment, additional protection, such as a metal guard, may be needed. 4. In an electroplating operation the heaters are not, under any circumstance, to be placed between the electrodes and the work. 5. When melting solids by direct immersion, a surface vent should be provided to allow gases to escape. Operate the heater on half voltage until melted material completely covers the heater area. 6. A drip loop is recommended to minimize passage of moisture along wiring into terminal box and connections. 7. WARNING: Hazard of Fire. Since these heaters are capable of developing high temperatures, extreme care should be taken to: A. Avoid installing heaters in an atmosphere containing combustible gases and vapors. B. Avoid contact between heater and combustible material. Keep combustible materials far enough away to be free of the effects of high temperatures. © 2010 Chromalox, Inc. WIRING WARNING: Hazard of Shock. Any installation involving inside the terminal box. If heater is used in an electroplating tank, electric heaters must be effectively grounded in the heater should be grounded externally to the tank wall to mini- accordance with the National Electrical Code to elim-mize stray plating currents in heater sheath that may cause sheath inate shock hazard. corrosion. 1. Electrical wiring to heater must be installed in accordance with the National Electrical Code and local electric codes by a qualified person as defined in the NEC. 2. When element wattages are not equal, heaters must not be connected in series. 3. Electrical wiring to heater should be contained in Rigid Conduit or in sealed Flexible Metal hose to keep corrosive vapors and liquid out of the terminal housing. Conduit should terminate at some remote area free of corrosive vapors. If high humidity is encountered, the conduit should slope away from the heater terminals to keep condensate away from the heater. 4. If flexible cord is employed with the heater, a watertight connector should be used for entry of the cord into the terminal box. 5. Make sure heater is grounded by attaching ground conductor, traceable back to service entrance, to the ground terminal located Note: If heater does not exceed the thermostatcapacity (25 amps), a contactor is not needed. Contactor120Vor240VThermostatJunctionBoxTypical Wiring DiagramL1L2 OPERATION 1. Do not operate heater at voltages in excess of that stamped on the 3. Sludge should not be allowed to build-up to the point where it con- heater since excess voltage will shorten heater life. tacts heater as this can lead to premature heater failure. 2. Always maintain 6 to 8” of solution above the heated portion of 4. If heater is inactive for a prolonged period or subjected to excesthe element to prevent exposure of the effective heated length. If sive moisture during shipments energize at half voltage for a perithe heater is not properly submerged, it may overheat and shorten od of time (generally overnight) before operating at rated voltage. heater life. MAINTENANCE WARNING: Hazard of Shock. Disconnect all power to 3. Check for loose terminal connections. heater before servicing or replacing heaters. 4. If corrosion is indicated in the terminal housing, check terminal 1. Heaters should be checked periodically for coating and corrosion box gasket and replace if necessary. Also check the conduit layout build-up and cleaned if necessary. to correct the conditions that allow corrosion to enter the terminal 2. Tank should be checked regularly for sediment around the end of housing. the heater as sediment can act as an insulator and shorten...