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FIREROD® Product Guide
CAUTION –
Due to environmental shipping and/or storage conditions, it may be necessary to perform a
dielectric test prior to startup. (Refer to megohm test under Installation section.)
WARNING – Risk of Electric Shock –
The bake-out procedures listed below should only be performed
by qualified personnel. If the procedure calls for connecting electric power to the product, this shall
only be performed by a qualified electrician, in accordance with applicable national and local electrical
codes.
Pre Installation
The following sets forth general safety instructions and requirements relating to the use and maintenance of the
product.
1. Upon receipt of the product, inspect for any damage occurring during shipment. If you have any concerns about
the condition of the product, do not install such product and contact your Watlow representative prior to taking
further action with the product.
2. Upon receipt of the product, confirm that the product received is the same as the product that was ordered. In the
event of a discrepancy, please contact your Watlow representative prior to taking further action with the product.
Installation
Proper product selection and installation will help to ensure heat transfer efficiency, safety and increased product life.
The following sets forth instructions and requirements relating to the installation of the product.
1.
Megohm pre-check
• During shipping and/or storage, the possibility of moisture absorption by the insulation material within a heater
element is possible. To determine if the proper megohm value is present, use a 500VDC (minimum) megohm meter
to measure the insulation resistance between the product’s power terminals and the product’s outer sheath. This
value should be greater than 1 megohm when the unit is at room temperature.
• If a low megohm value exists, bake the product in an oven at 350°F (177°C) ± 50°F (27°C) for a duration of
12 to 24 hours.
See caution note below,
not all electrical insulating components are capable of this temperature.
After baking, repeat the megohm insulation resistance test to verify that 1 megohm insulation resistance has been
achieved. If the product fails a second insulation resistance test, contact your Watlow representative.
• A second method to dissipate moisture within the heating element is to energize the unit at low voltage
(recommend 50% of design voltage with a maximum of 120VAC) until the insulation resistance reaches an
acceptable level. Precautions should be taken to
prevent the heater sheath from exceeding
752°F (400°C) for
304 SS and Alloy 800.
• Whenever possible, the installed product should remain energized at an intermediate temperature to prevent
moisture accumulation.
• Operation of any oven or any other heating or electrical equipment in performing any oven bake shall be done
at user’s sole and absolute risk.
CAUTION –
Do not exceed temperature rating of any lead wire insulation materials if an oven bake is
performed.
FIREROD® Product Guide
