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FIREROD® Product Guide
3. Termination/Environment
Do not handle the product by the lead wires or sensor wires!
Handling by the leads can compromise electrical and/or mechanical integrity of the product. Certain wires such
as fiberglass jacketed wires may also cause skin irritation or other personal injuries.
In order to maintain termination integrity, the termination area should be kept below 400°F (222°C) or the
maximum temperature rating of the lead wire insulation. Keep terminations clean, dry and tight. Do not allow oil,
moisture or other possible contaminants to come in contact with the lead wires or the electrical termination end
of the product.
CAUTION –
Failure of components in a temperature control loop, such as the sensor, heater control relay
or main temperature controller, can result in damage to a product in process, a product failure and/or
damaging fire. To protect against this possibility, over-temperature protection must be provided to interrupt
or remove power from the heater circuit during abnormal conditions. To limit this risk, perform a functional
test of all temperature limiting devices on a regular interval.
CAUTION –
Certain heating applications may accompany volumetric expansion and/or phase change. In all
cases, ensure that appropriate safeguards against over-pressurization are included in system design.
WARNING –
Electric heaters are capable of developing high temperatures. To minimize the risk of fire or
other personal injury or property damage, extreme care should be taken at all times to use and maintain
the product in a safe environment. Operating this product in atmospheres containing combustible gases
and vapors should be avoided.
This product is not suitable for use in hazardous (classified) locations.
FIREROD® Product Guide
WARNING –
Always install high temperature control protection in systems where an over temperature fault
condition could cause a fire or other hazard. Failure to install temperature control protection where such a
hazard exists could result in damage to equipment, property, and/or injury to personnel.
NOTE:
It is the responsibility of the user to properly use overtemperature control devices or protection
circuits, even if the product has been supplied with thermocouples or thermostats.
2. Protection of heater elements from over temperature
The use of a temperature controller to regulate the heating process and prevent product over temperature is
critical to ensure the safe operation. User shall also ensure that the thermal insulating materials used in the
process do not come in contact with any portion of the product. It is the user’s responsibility to ensure safety
of the installation.
CAUTION –
Ensure that the heater is installed in the correct orientation. A hi limit sensor (if so equipped)
is critical! For more information regarding the correct orientation for your product, contact your Watlow
representative.
For Immersion applications, in order to help prevent premature failure and a potentially hazardous
condition in cases where consequences of failure may be severe, use an appropriate third party approved
liquid level protection device. The liquid level should be such that the entire heater sheath (other than
non-immersed cold section) is fully submerged with enough liquid above the heater to adequately dissipate
heat from itself as under normal operating conditions
All temperature limit devices must have appropriate third-party approval and be applied in the classification for
which it was tested and approved. The high temperature limiting device(s) should function independently from the
process temperature control.
CAUTION –
Heater orientation is important in order to ensure efficient heat transfer and safe operation.
Care should be taken to allow enough room for heater expansion without compromising heat transfer.
