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Min. 2-3/8” Max. 3/4” Pipe Outlet Type E2 Moisture-Tight Explosion-Resistant Enclosure Model kW Volts Phase Dim. (In.) Pipe Thd.A B MTO-241LT 4 240 1 127 120 2 MTO-241LT 4 480 1 127 120 2 MTO-251LT 5 240 1 163 156 2 MTO-251LT 5 480 1 163 156 2 MTO-275LT 7.5 240 1 211 204 2 MTO-275LT 7.5 480 1 211 204 2 MTO-212LT 11.5 480 1 319 312 2 MTO-213LT 13 480 1 367 360 2 WARNING: Calculate and allow for thermal expansion. Pipe insert will expand upon heating. The rear end of the pipe insert must remain free from the tank wall. Heating elements will also expand upon heating and must not extend to the end of the pipe insert. Chromalox type MTO-LT screwplug immersion heater is designed for insertion into a 2” or larger pipe. WARNING: It is the responsibility of the purchaser of the heater to make the ultimate choice of pipe material based upon his knowledge of the chemical composition of the corrosive solution, character of the material entering the solution and controls which he maintains on the process. Chromalox cannot warrant any electric immersion heater against failure, if such failure is the result of corrosion due to improper material selection by the user. 1. Heater Construction Characteristics: A. High quality resistance wire held in place by compacted Magnesium Oxide Refractory enclosed in an Incoloy® sheath. B. Low to High Watt densities. C. Explosion Resistant/Liquid-Tight E-2 terminal enclosures are standard. WARNING: Users should install adequate controls and safety devices with their electric heating equipment. Where the consequences of failure may be severe, backup controls are essential. Although the safety of the installation is the responsibility of the user, Chromalox will assist in identifying equipment options. INSTALLATION WARNING: Hazard of Shock. Disconnect all power before installing heater. 1. Before installing, check your type MTO-LT pipe insert heater for any damage that may have occurred during shipment. 2. Check to insure that the line voltage is the same as that stamped on the nameplate. 3. Do not bend the heating elements. If bending is necessary, consult factory. 4. IMPORTANT: Mount heater in the tank so that the liquid level will always be above the effective heated portion of the heater (see Figure 1). If the heater is not properly submerged, it may overheat and damage the heating elements and create a possible fire hazard due to excessive sheath temperatures. 5. Where work will pass over or near equipment, additional protection such as a metal guard may be needed. Note: Locate Heater as low as possible for maximum liquid storage capacity. Heat does not move downward. Figure 1 - Open Tank Installation Expected Low Level of Liquid This Portion of Heater Above Liquid Level and Exposed to Air Will Lead to Premature Burnout of Element Expected Maximum Sediment Level RIGHT WRONG © 2010 Chromalox, Inc. INSTALLATION 6. Heater must not be operated in sludge. 7. Install the heater using a high quality pipe sealing compound on the threads. Screw the heater into the opening (Figure 2). Tighten sufficiently with wrench applied on the hex portion of the screw- plug. WARNING: Care must be taken to insure the heated portion does not extend into the coupling area (see Dimensions). Approx. 6” Cold Figure 2 - Exploded View Pipe Insert Heater Mounting 2” 8.Closed Tank Installation NOTE: When heating in closed vessels, controls and back-up controls must be used to prevent buildup of temper- ature and/or pressure. A.Horizontal Position (Figure 3) HeaterOutletInletNote: In a Forced Circulation System, Use Pump In Inlet SideFigure 3 - Closed Tank in Horizontal Position A1. Place heater at an elevation so that natural circulation can take place. A2. Position outlet and inlet in a vertical plane, facing upward to prevent air pockets. Be sure all trapped air is removed from the closed tank. Bleed the air out of the liquid piping system and heater housing prior to operation. A3. IMPORTANT: Heater should never be located at the highest point in the system. Provide expansion tank, if necessary. B. Vertical Position (Figure 4) 9. DANGER: Hazard of Fire — Since the heaters are Locate Drain Pipeat Bottom of Heater. Sediment Deposits may beRemoved Through Drain PipeMaximum Sediment Level. Install Heater AboveThis Level But as Near to it asPossible for Maximum HeatedSolution Storage CapacitySuitableWiringDrip Loop Recommendedto Minimize Passage ofMoisture Along WiringInto Terminal Wiringand ConnectionsOutletInletFigure 4 - Closed Tank in Vertical Position capable of developing high temperatures, extreme care should be taken to: A.Avoid contact between heaters and combustible materials. B. Keep combustible materials far enough away to be free of the effects of high temperatures. WIRING WARNING: Hazard of Shock. Any installation involving electric heaters must be effectively grounded in accordance with the National Electrical Code. 1. Electric wiring to heater must be installed in accordance with the National Electrica...