INSTALLATION, OPERATING &
MAINTENANCE INSTRUCTIONS FOR
781 SERIES STORAGE TANK HEATERS
GENERAL
INDEECO Storage Tank Heaters are designed to provide
years of trouble free operation if properly installed and
maintained. Please read and follow these instructions for
installing and maintaining the heater.
1
Storage Tank Heaters provide an effective way to heat large
storage tanks. The heating element design allows removal
and servicing of the heating element without draining the
tank.
HEATING ELEMENT CONSTRUCTION
The heating elements are open coil design and consist of
heavy gauge nickel-chromium alloy supported by ceramic
insulators. The ceramic insulators are fastened to a strip of
heavy sheet metal.
PIPE ASSEMBLY CONSTRUCTION
The heating elements are installed in 3” NPS pipes of
sufficient wall thickness to prevent the pipe from distorting
from the heat generated. The pipes are constructed so that
the heating elements may be removed without draining the
tank. Multiple pipes are provided as required. The heater is
mounted to the tank by one of three methods: ANSI flange
mount, INDEECO adapter box, or with a custom rectangular
flange.
A built-on terminal box is provided with pre-wired controls for
proper heater operation. When requested, controls may be
remote mounted. Refer to IOM 87-2000-83 for remote
Industrial Control Panels.
The heater watt density and design features must be closely
matched to the application. Life of the heating element is
directly related to its surface temperature.
Temperature regulating devices, temperature limiting
controls, and low liquid level controls are recommended for
use with Storage Tank Heaters, to control the heating
process and safeguard the heater from excessive
temperatures that can cause damage. Also, damage to fluid
could occur if the heater is allowed to exceed the maximum
film temperature recommended by the manufacturer.
INDEECO Storage Tank Heaters can be specially designed
for use in hazardous areas as specified in Article 500 through
516 of the National Electrical Code. Refer to the heater
nameplate or INDEECO Application Data for classification of
the heater provided. See section below labeled Hazardous
Areas for specific requirements.
It is the ultimate responsibility of the user to verify that
the construction materials provided by INDEECO are
suitable for use with the process fluid. Specifically,
corrosion issues must be reviewed. Refer to INDEECO
Application Data for heater construction materials and
design conditions.
For additional product offerings, refer to INDEECO catalog
literature on Process Heating such as Circulation Heaters,
Immersion Heaters, or Tubular Heating Elements.
INSTALLATION
Handling and Storage
Care must be taken to avoid damage to the heater during
storage and handling. The Pipe Insert Heater elements are
constructed of ceramics that can be damaged if not handled
carefully.
Protect the heater from weather damage during storage.
CAUTION
Failure to follow INDEECO recommendations could
result in premature failure and/or serious equipment
damage.
CAUTION
INDEECO recommends installation be performed by
qualified personnel familiar with the National Electrical
Code and all local codes and standards. It is the
responsibility of the installer to verify the safety and
suitability of the installation
WARNING
DO NOT mount heaters in an atmosphere containing
combustible gases, vapors, dusts, or fibers unless properly
marked as suitable for the condition. Refer to section
below for special instructions for Hazardous Areas.
It is recommended to store the heater in a cool dry area to
help prevent the heating element ceramic spacers from
drawing moisture.
WARNING
Hazardous voltages are present in this equipment. Lock
out and tag the branch circuit disconnect switch before
working on this heater.
