Hubbell Electric Heater Company CR manual Outer Shell, Insulation, And Supports, Heating Element, Electrical Enclosure

OUTER SHELL, INSULATION, AND SUPPORTS

The pressure vessel is encapsulated in 2-inches of high-density fiberglass insulation. The protective shell is constructed of galvaneel and is coated with a durable silver hammertone finish. The horizontal configuration is supported on heavy-duty steel I-beam supports. Also available in a vertical configuration or wall hung for off the floor installation.

HEATING ELEMENT

The heater is supplied with a flanged electric immersion heating element assembly, composed of copper, incoloy, or stainless steel sheathed elements that are brazed or welded into a ANSI steel flange. The heating element is fastened to a corresponding tank flange using a gasket and hex head steel bolts and nuts. Specialized heating element construction may be included. These options include: special watt density ratings, passivation, electropolishing, or special materials. See drawing for voltage, power ratings, and special options.

ELECTRICAL ENCLOSURE

A louvered control panel available in various sizes and with assorted types of handles is supplied. The standard cabinet is rated NEMA 1, but other NEMA rated enclosures are available, consult drawing for further information. A list of NEMA ratings are available in Section VI. An optional explosion-proof enclosure is available for hazardous locations.

FLOW SWITCH

The heater is supplied with a factory installed and wired safety flow switch. This device will allow the immersion heating element to energize only when there is sufficient flow through the unit.

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