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Resumen del manual
Avoid operation of heater near combustible fluids or in combustible vapor or gas laden atmosphere. 5. Provide adequate space at terminal end to permit withdrawal of the heater from chamber should servicing be required. 6. If two or more heaters are needed to provide the needed heating capacity, arrange them for series gas or vapor flow. EXPLOSION HAZARD. When heating in closed vessels, controls and back-up controls must be used to regulate build-up of temperature and/or pressure. 7. A pressure relief valve should be provided by customer at outlet of vessel. There should be no other valving between vessel and WIRING 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. Be sure line voltage matches heater voltage (on nameplate). 2. Electric wiring to heater must be installed in accordance with local codes and the National Electrical Codes. 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 Diagram Table B, to properly connect the heater. Table B — Wiring Diagrams Model 240V 480V 1o Fig. No. 2-1o Fig. No. 3o Fig. No. 2-3o Fig. No. 1o Fig. No. 2-1o Fig. No. 3o Fig. No. GCH-60905 1 — 3 — 5 — 7 GCH-61205 — 2 3 — 5 — 7 GCH-62005 — 2 — 4 5 — 7 GCH-62505 — — — 4 — 6 7 GCH-63005 — — — 4 — — 7 GCHIS 4, 8 12, 15,20 kW — — 8 — — — 9 LINECONTACTORTHERMOSTAT120V, 240VFigure 1 – GCH6240V, 1o LINECONTACTORSTHERMOSTAT120V or240VFigure 2 – GCH6240V, 2-1o CONTACTORTHERMOSTAT120V, 240VFigure 3 – GCH6240V, 3oL1L2L3 CONTACTORSTHERMOSTAT120Vor 240VFigure 4 – GCH6240V, 2-3o1L11L21L32L12L22L3 CONTACTORSTHERMOSTAT120V or 240VFigure 5 – GCH6480V, 1oLINE CONTACTORSTHERMOSTAT120V or240VFigure 6 – GCH6480V, 2-1oLINE WIRING CONTACTORTHERMOSTAT120V, 240VFigure 7 – GCH6480V, 3oL1L2L3 Instructions for converting GCH6, 240V, 3o to GCH6, 480V, 3o 1. Remove all jumper straps and separate according to different lengths. 2. Discard jumper straps 166-075229-018 (1-1/4” long). 3. Reassemble jumper straps 166-014828024 (2-1/2” long) and 166-075229-014 (1-1/2” long) as in Figure B. 4. Replace washers and nuts. 5. Check circuits. CONTACTORTHERMOSTAT120V, 240VFigure 8 – GCHIS240V, 3oYL1L2L3 CONTACTORTHERMOSTAT120V, 240VFigure 9 – GCHIS40V, 3oYL1L2L3 166-075229-014166-014828-024166-075229-018240V LINEFIGURE A240V, 3o (Parallel) Connected 166-075229-014166-014828-024480V LINEFIGURE B480V, 3o (Series) Connected NOTE: Broken Lines Indicate “Customer-furnished”. However, thermostat could have been furnished by chromalox if so specified on order. OPERATION 1. Do not heat materials that are corrosive to the heating element sheath or chamber. 2. 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. 3. If foreign material is carried by the gaseous flow, install suitable filters in the inlet pipe line to the heater. 4. Do not allow heater to operate when steam, air or gas flow is interrupted. FIRE/EXPLOSION HAZARD. Safe operating conditions depend on operating pressure, mass velocity of gas and discharge temperature of the gas. At a given discharge gas temperature, heater element sheath temperature and pipe body temperature tend to increase as gas flow (mass velocity) decreases. The standard GCH-6 has a 750°F limitation on the carbon steel body and a 1500°F limit on the INCOLOY sheath elements. Check factory if any doubt exists as to temperatures that will be encountered in your specific application. At pipe body temperatures above 750°F, stainless steel pipe body is required (model GCHIS). FIRE/EXPLOSION HAZARD. Do not exceed the Pressure-Temperature rating of the flange as listed in ANSI B16.5. MAINTENANCE 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 and serviced by a qualified person in accordance with the National Electrical Code, NFPA 70. 1. Remove heating element assembly periodically to check heater sheath for corrosion or excessive oxidation. Correct operating conditions to minimize sheath deterioration. 2. Periodically check temperature control and limit control operation to insure accurate and safe process operation. 3. Check all electrical connections periodically and retighten connections which may have loosened in service. Replace wire and wire terminals that show signs of oxidation which would interfere with establishment of reliable electrical connections. NOTE: Maintenance intervals to be determined by the user based on their knowledge of the he...