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 pre- vious 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 mount- ing 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 com-
bustible 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 ground- ed 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 connect- ing the GCH series heater.
6.Other circuit arrangements are often supplied depending upon cus- tomer 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 composi- tion of the corrosive solution and the character of the materials enter- ing the solution as well as the corrosive effect of the solution upon entering the heating elements and chamber. Chromalox cannot war- rant 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, con-
densation, spray or direct
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 inter- rupted 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 con- ditions to minimize sheath deterioration.
3.Periodically check temperature control and
4.Check all electrical connections periodically and retighten con- nections which may have loosened in service. Replace wire and wire terminals which show signs of oxidation which would inter- fere with establishment of reliable electrical connections.
5.Clean any filters in the inlet pipeline to avoid reduced flow, which can cause element overheating and premature failure.
