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WIRING
WARNING:
Hazard of electrical shock. Any installation
involving electric heaters must be grounded to earth to elim-
inate shock hazard.
1. Electrical wiring to heater must be installed in accordance
with the National Electric Code and/or local electrical codes.
2. When element wattages are not equal, heaters must not be
connected in series.
3. Electrical wiring to heater should be connected in rigid con-
duit or in flexible hose to keep corrosive vapors and liquids out of
the terminal housing. If high humidity is encountered, the conduit
should slope down away from the heater.
4. If flexible cord is employed, a watertight connector should be
used for entry of the cord into the terminal box. Outdoor applica-
tions require liquid-tight conduit and connectors.
5. Bring the power line wires through the opening in the terminal
box. Connect line wire as shown in the diagram. (Figures 1 thru 3)
NOTE: Dotted lines indicate “customer furnished.”
OPERATION
1. Do not heat materials that are corrosive to the heating element
sheath or chamber. For steam heating service, condensate drain
may be provided from bottom of chamber. Check factory.
2. Terminal ends of heater must be protected from drippings con-
densation 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. Check
with local sales representative.
3. If foreign material is carried by the gaseous flow, install suit-
able filters in the inlet pipe to the heater.
4. Do not allow heater to operate when steam, air or gas flow is
interrupted.
MAINTENANCE
WARNING:
Hazard of electric shock. Disconnect all power
before servicing heater.
1. Remove heating element assembly periodically to check
heater sheath for corrosion or excessive oxidation. Correct operat-
ing conditions to minimize sheath deterioration.
2. Periodically check temperature control and limit control oper-
ation to insure accurate and safe process operation.
3. Check all electrical connections periodically and retighten
connections which may have loosened in service. Replace wire
terminals which show signs of oxidation which would interfere
with establishment of reliable electrical connections.
RENEWAL PARTS IDENTIFICATION
THERMOSTAT 200-550˚F..........................300-048518-013
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: 1-800-368-2493 www.chromalox.com
TA - U0 - EF
Printed in U.S.A.
3 Pole Contactors
3 Heating Elements
Line
Control
Volts
Thermostat
2 Pole Contactors
1, 2, or 3 Heating Elements
in Series
Line
Control
Volts
Thermostat
or Parrallel
3 Pole Contactors
3 Heating Elements
Line
Control
Volts
Thermostat
Figure 1
For Three Phase WYE Heaters
Figure 2
For Single Phase Heaters
Figure 3
For Three Phase Delta Heaters
Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
http://www.chromalox.com/customer-service/policies/termsofsale.aspx.