Assessments - 4, GPA: 4.5
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Consult with Chromalox for operating restrictions in hazardous locations. Note: The GCHIS is intended for use in corrosive or high temperature applications. The INCOLOY® sheathed tubular elements are centered in a steel/stainless steel heating chamber and welded to a removable steel/stainless steel flange. The number of elements will vary, depending upon the flange size used. Some units are fitted with baffles to increase the flow. They are designated as GCHB. The assembly is surrounded by insulation and a sheet metal jacket. Depending upon the order specifications, the GCH/GCHIS may or may not be factory equipped with an AR or other Chromalox thermostat. Such thermostats function to control outlet temperatures and to limit internal temperatures under abnormal flow conditions. These controls are not fail-safe. WARNING: Users should install adequate back-up controls and safety devices with their electric heating equipment. When heating in closed vessels where the consequences of failure may be severe, controls and back-up controls must be used to prevent buildup of temperature and/or pressure. Although the safety of the installation is the responsibility of the user, Chromalox will be glad to make equipment recommendations. © 2010 Chromalox, Inc. INSTALLATION WARNING: Hazard of Electric Shock. Disconnect all power before installing heater. 1. Before installing, check your GCH/GCHIS circulation heater for any damage that may have occured during shipment. 2. Check to insure that the line voltage is the same as that stamped on the nameplate. 3. Vertical mounting (axis of chamber vertical as in Figures on previous page) is preferred. 4. To avoid excess temperatures at electrical wiring, mount heater with terminal enclosure at bottom, and use lower nozzle as inlet to the circulating steam, air or gas. 5. The GCH/GCHIS series of circulation heaters is provided with mounting lugs to support the heater chamber. Refer to figures on previous page for location of these mounting lugs. 6. Mount heaters to permit unrestrained expansion of chamber due to temperature. This can be accomplished by using a slotted mounting assembly on either of the lugs. 7. Provide adequate space at terminal end to permit withdrawal of the heater from chamber should servicing be required. 8. DANGER: Hazard of Fire. Provide a minimum of 6” spacing from chamber and related piping to nearest combustible material. Avoid operation of heater near combustible fluids or in combustible vapor or gas laden atmosphere. 9. If two or more heaters are required to provide the needed heating capacity, arrange them for series gas or vapor flow. 10. DANGER: Possible Explosion. A pressure relief valve should be provided by customer at outlet of vessel. There should be no valving between vessel and relief valve. 11. In a forced circulation system, use pump on the inlet side. WIRING WARNING: Hazard of Electric Shock. Any installation involving electric heaters must be effectively grounded in accordance with the National Electrical Code to eliminate shock hazard. 1. Be sure line voltage matches heater voltage (on nameplate). 2. All wiring should be done in accordance with local codes and the National Electrical Code by a qualified person as defined in the NEC. 3. Because of the high operating temperatures expected, 250°C wire should be used. 4. Power controls must be used when heaters are rated 3 phase and when the heater amperage exceeds the rating of the thermostat. 5. Refer to Wiring Diagrams for the typical wiring used for connecting the GCH series heater. 6. Other circuit arrangements are often supplied depending upon customer specifications or amperage rating. OPERATION WARNING: Do not heat materials that are corrosive to the heating element sheath or chamber. It is the responsibility of the user to know the chemical composition of the corrosive solution and the character of the materials entering the solution as well as the corrosive effect of the solution upon entering the heating elements and chamber. Chromalox cannot warrant any electric circulation heater against failure by sheath corrosion if such failure is the result of operating beyond our control. 1. Terminal ends of heater must be protected from drippings, condensation, spray or direct spill-over of material whose presence at the terminals may damage heater electrical insulation. Liquid-tight terminal enclosures are available to protect heater. Consult your Local Chromalox Sales office. 2. If foreign material is carried by the gaseous flow, install suitable filters in the inlet pipe line to the heater. 3. Do not allow heater to operate when steam, air or gas flow is interrupted as dry operation of the heater can cause failure. MAINTENANCE 1. WARNING: Hazard of Electric Shock. Disconnect all power before wiring or servicing heater. 2. Remove heating element assembly periodically to check heater sheath for corrosion or excessive oxidation. Correct operating conditions to minimize sheath deterioration....