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Three phase
Three phase
Line current
Line current
For wiring recommendations refer to the wiring diagram. An
For wiring recommendations refer to the wiring diagram. An
additional copy is provided inside the heater terminal box.
additional copy is provided inside the heater terminal box.
Wiring to the heater should be permanently installed in
Wiring to the heater should be permanently installed in
metallic or non-metallic electrical grade conduit in accordance
metallic or non-metallic electrical grade conduit in accordance
with all applicable electrical codes, and should include a
with all applicable electrical codes, and should include a
grounding conductor if non-metallic conduit is used.
grounding conductor if non-metallic conduit is used.
Field supply wiring must be rated for 600Vac. Use copper
Field supply wiring must be rated for 600Vac. Use copper
conductors.
conductors.
The electrical installation should include a service disconnect
The electrical installation should include a service disconnect
switch in sight of the heater, as well as branch circuit over-
switch in sight of the heater, as well as branch circuit over-
current protection and over-temperature protection, if not
current protection and over-temperature protection, if not
provided with the heater.
provided with the heater.
Where thermocouple extension wire is required between the
Where thermocouple extension wire is required between the
heater and remote controls, verify it is connected with proper
heater and remote controls, verify it is connected with proper
polarity, as shown on the wiring diagram. Failure to do so
polarity, as shown on the wiring diagram. Failure to do so
may result in an uncontrolled heater. Refer to the wiring
may result in an uncontrolled heater. Refer to the wiring
diagram for the required wire type. Shielded wire is
diagram for the required wire type. Shielded wire is
recommended to reduce signal interference.
recommended to reduce signal interference.
Cautions and Setup
Cautions and Setup
Equipment should be operated by qualified personnel
only to prevent equipment damage or failure.
WARNING
DO NOT TURN ON HEATING ELEMENTS UNTIL
TANK IS COMPLETELY FULL OF FLUID.
Permanent damage may result if elements are
energized and the heater is not completely
submerged.
Carefully review all instructions and become familiar with the
equipment, safety interlocks, and process temperature
controller provided before energizing the equipment.
DO NOT operate heaters at voltages in excess of that
marked on the heater. Excess voltage can shorten heater life
or overload the branch circuit wiring.
DO NOT operate heaters unless properly filled with liquid.
DO NOT leave heating systems operating unattended unless
a closed-loop process controller and over-temperature safety
equipment have been completely validated.
DO NOT operate heaters at pipe temperatures higher than
the recommended maximum. Excess temperatures can
cause premature failure. Generally, pipe materials are limited
to the following maximum temperatures.
KW x 1000
KW x 1000
1.732 x Line Voltage
1.732 x Line Voltage
CAUTION
Retighten all electrical connections that may have
loosened during shipment. Failure to do so may result
in damage to the heater or risk of fire.
Confirm all unused conduit holes in the terminal box are
Confirm all unused conduit holes in the terminal box are
sealed with plugs suitable for the heater environment.
sealed with plugs suitable for the heater environment.
Attach a ground conductor to the mounting screw for the
Attach a ground conductor to the mounting screw for the
heater in the terminal box, or by other appropriate means, per
heater in the terminal box, or by other appropriate means, per
NEC Article 250.
NEC Article 250.
Be sure the terminal box cover is properly installed at all
Be sure the terminal box cover is properly installed at all
times to ensure personnel protection. Also, contaminants can
times to ensure personnel protection. Also, contaminants can
create leakage, (shock) hazards, permanent heater damage
create leakage, (shock) hazards, permanent heater damage
or failure and should be avoided.
or failure and should be avoided.
It is recommended to perform an insulation resistance test
It is recommended to perform an insulation resistance test
prior to energizing the equipment. If the value is less than 1
prior to energizing the equipment. If the value is less than 1
Meg Ohm using a 500Vdc or similar tester, refer to
Meg Ohm using a 500Vdc or similar tester, refer to
Maintenance and Troubleshooting sections.
Maintenance and Troubleshooting sections.
OPERATION
OPERATION
Steel
Stainless Steel 304
Ensure power ahead of the panel is off and perform the
following steps:
1. Exercise all switches, circuit breakers and operating
mechanisms to confirm they operate freely.
2. Conduct an insulation resistance to ensure the system is
free from short circuits or grounds.
INDEECO recommends that all safety interlocks be tested
during initial startup to ensure they properly disable the
heater. After 10 days of operation, retighten all electrical
connections.
For solid state non-indicating controllers, it is recommended
to dial the high limit controller set-point down to a point below
normal operating temperature, either during initial startup
operation or with only the control circuit on, and verify that the
contactors open, disconnecting heater power. Return the
controller to the desired setpoint.
PID controlled systems must be auto-tuned after initial
installation to optimize control accuracy.
Refer to information noted below on Control Methods.
During initial heating, it is recommended to slowly ramp up
the process setpoint and inspect the heating system for
problems such as excess pressure buildup, or binding of
equipment due to thermal expansion.
3
WARNING
Pipe
Maximum
Material
Pipe Temperature
750° F
1400° F
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