Over-the-Side Heaters

PreciseHeater Over-the-Side Immersion 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.

Over-the-Side Heaters are built with tubular electric resistance elements soldered or welded to a fabricated box. The heater can be installed in holding or storage tanks to heat a fluid. Standard designs utilize a riser tube to route the electrical wiring up above the fluid level of the tank.

Instructions for Industrial Control Panels, if provided, are per IOM ENM - 2179. For additional product information and offerings, refer to Indeeco catalog literature on Circulation Heaters, Immersion Heaters, or Tubular Heating Elements.

Standard construction is rated for 250o F. High temperature designs are also available. For high temperature heaters, the heater design features must be closely matched to the application. For end use applications, it is the responsibility of the installer to verify suitability through testing and installation of temperature regulating and temperature limiting controls.

The heating elements are available in various watt density ratings. Operating temperature, watt density and flow velocities (agitated tanks) determine the element surface temperature. Life expectancy of the heating element is directly related to its surface temperature. 

Handling and Storage

Care must be taken to avoid damage to the heater and tubular elements during storage and handling.

Protect the heater from weather damage during storage if shipping packaging is not sealed. It is recommended to store the heater in a cool dry area to help prevent the heating elements from drawing moisture.

Mechanical Instructions

Site Selection
Review the NEMA Type rating of the heater. Contact the factory if unsure of the rating. Do not install a heater in an area not consistent with its rating.

Allow sufficient free space around heater installation site. Work space for heater maintenance should be at least three feet in front of the heater. The minimum pull space for the Over-the- Side Heater installation or removal from the tank should be considered. 

Field supplied conductors must be sized for at least 125% of the circuit current.
To calculate the circuit (in amps): 

Wiring to the heater should be permanently installed in metallic or non-metallic electrical grade conduit in accordance with all applicable electrical codes, and should include a grounding conductor if non-metallic conduit is used.

Field supply wiring must be rated for 600Vac. Use copper conductors.

The electrical installation should include a service disconnect switch in sight of the heater, as well as branch circuit over- current protection and over-temperature protection (if not provided with the heater).

Wiring recommendations noted on the wiring diagram when application data provided to Indeeco. An additional copy is provided on the wiring diagram inside the heater terminal box.

Where thermocouple extension wire is required between the heater and control panel, verify it is connected with proper polarity as shown on the wiring diagram. Failure to do so may result in an uncontrolled heater. Refer to the wiring diagram for the required wire type. Shielded wire is recommended to reduce signal interference.