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FIREROD® Product Guide
WARNING –
After applying power to the product, make sure that the system is being controlled properly
before leaving it to run unattended. Failure to do this could result in the product overheating in a “run away”
condition that could lead to damage to equipment, fire or personal injury.
Troubleshooting
The information provided below contains potential causes and corrections for functional problems with the product.
This is a non-exhaustive list of potential problems and corrections and is not meant to cover all potential issues.
Please do not hesitate to contact your Watlow representative if you have any questions regarding the performance of
your product.
WARNING – Risk of Electric Shock –
High voltage is present when the product is energized and hence
troubleshooting of this product shall only be done by qualified personnel.
It is the end user’s responsibility to ensure that proper precautions are taken in reference to applicable
personal safety equipment needed by those installing and maintaining equipment.
Problem
Cause/Correction
No power available to product
Check disconnect switch to ensure it is in the “ON”
position and that fuses are not blown. Replace fuses if they are
blown.
Fuses blowing
Check heater electrical rating. Verify line voltage is within
specification.
Check fuse rating. Fuses should be at least 25 percent more
than full load amperage.
Disconnect product power source. Check the heater resistance
to ground. This should be no less than one megohm. Refer to
‘megohm pre-check’ in the Installation section of this guide.
Not enough power/application not heating to desired
temperature
Verify line voltage is within specification.
If voltage is correct, check full line current draw. If line
current is lower than designed, the heater circuit may be
wired incorrectly or the temperature controller and/or power
switching settings may need to be adjusted to deliver a greater
duty cycle percentage.
Heat losses to other system components and to the ambient
environment may be higher than initially calculated/estimated.
A higher wattage heater or additional thermal insulation in the
system may be required.
Preventative Maintenance
WARNING – Risk of Electric Shock –
High voltage is present when the product is energized and hence
preventative maintenance of this product shall only be done by qualified personnel.
Turn all power off to the product and “lock out/tag out” the power disconnect switch(es) for the product
before preforming any preventative maintenance.
It is the end user’s responsibility to ensure that proper precautions are taken in reference to applicable
personal safety equipment needed by those installing and maintaining equipment.
WARNING –
The product, vessel and system can remain hot for a long period of time after the power has
been removed, so make sure the equipment has cooled down to a safe temperature before preforming any
preventative maintenance.
Thermal cycling, corrosion and vibration can cause degradation of the thermal system and electrical interfaces.
Follow system designer’s guidelines for periodic checking of the condition of the installed product and the electrical
connections.
