Firebox Temperature Controller

Overview   |   Details   |   Features


The Firebox Temperature Controller is designed to interface with the Polyshot Heated Sprue Bushing, Multitip System, and the Bank System. The Firebox is designed to stand up to the rigorous environment of the injection molding room floor. It is a closed loop unit with provision for manual or “Open Loop” control.

The 3601 Firebox features an Auto-Tuning PID function that precisely matches the controller’s electronic algorithms to the runnerless mold­ing system it is connected to. This is accomplished by engaging the Auto-Tune function through the operator interface, which launches an electronic tuning cycle between the controller and the system it’s controlling. Upon completion of this cycle, the Firebox rewrites its PID algorithms to precisely match the runnerless molding system it is con­trolling. When coupled with the controllers burst fire relay system, the control of processing temperature is excellent.

firebox Temperature Controller


Controller Type: Closed loop, automatic compensation with manual open loop proportional selector, single zone.
Thermocouple Required: Type J, constant grounded or ungrounded.
Control Range: 32° to 1382° F, 0° to 750° C.
Control Accuracy: +/- 0.1% of range.
Alarms: User defined above and below set point, open or reversed thermocouple.
Power Output: 240 VAC 15 amps maximum.
Power Control: Solid state relay with zero crossing director.
Load Fuse: ABC type, 15 amps.
Control Fuse: ABC type, 2 amps.
Power Requirements: 208 - 240 VAC, Single Phase.
Alarm Type “Sonalert” 80 DB
Dimensions: 6.50” wide x 4.25” high x 8.25” deep
165mm wide x 108mm high x 300mm deep.
Dimensions do not include handles.
Shipping Weight: 6 lbs., 2.7kg.


Upper Display: LED display indicating process temperature as measured by Type J Thermocouple.

Lower Display: LED display indicating set point during Auto mode, and the percent power during Manual mode.

Load: LED indicates when the Zone is energized.

ALM: LED indicates when the alarm is active.

MAN: LED lit when the controller is in Manual mode.

Mode Key: Steps the control through Alarm Low, Alarm High, and Auto-tuning op­tions.

Up Key: Increases the set point. Also used in alarm setting and auto-tuning proce­dures.

Down Key: Decreases the set point. Also used in alarm setting and auto-tuning proce­dures.

Auto/Manual Key: Clears the alarm when pressed once. Toggles between Auto and Manual mode.

Circuit Breaker: To activate the Firebox, the rocker switch must be pushed to the “on” position. This switch should be “off” whenever the unit is being plugged in or un­plugged from a 208-240 volt single phase outlet.

Thermocouple Failure Protection: If the process was stable when the thermocouple failed, the controller will transfer from auto to manual mode. The process will auto­matically continue at the power level experienced in the two minutes prior to the power failure, providing that the power level was less than 75%, and a power change of less than 5% occurred. This will allow the system to continue functioning until a thermocouple repair can be made. The percentage of power will be displayed in the lower display. If process is not stable or the power level is greater than 75%, the out­put is disabled.

Alarms: User defined temperatures that are the extremes on either side of the set point at which the process can operate.

Alarm Low: Represents the low process alarm. The alarm sounds when the process temperature strays too far below the set point.

Alarm High: Represents the high process alarm. The alarm sounds when the process temperature strays too far above the set point.

Auto-Tune: Provides automatic tuning of the PID parameters to fit the characteristics of your particular thermal system. Successful completion of the auto-tune procedure requires the process to cross the set point four times within eighty minutes after auto-tune has started. Typical auto-tune procedures last five to ten minutes. During auto-tune, the lower display alternately displays the set point temperature and the prompt “At.” When auto-tune is complete, the lower display will continuously show the set point temperature. Any change in set point while in auto-tune reinitiates the auto-tune procedure. Auto-tuning should be repeated after making any changes in the molding process.

Temperature Units: The Firebox is capable of measuring temperature in both Celsius and Fahrenheit. The default setting is Fahrenheit. To change the setting to Celsius, contact Polyshot for further information.

Multi Zone Controllers

Overview   |   LEC   |   G24


Gammaflux Controls Inc. is the world’s leading supplier of temperature and sequential valve gate control systems to the plastics industry. An expert in process optimization, Gammaflux partners with plastics parts manufacturers to help them achieve higher quality, efficiency, and profitability. The company primarily serves the hot runner injection molding industry but also provides temperature control solutions for blow molding, extrusion, thermoforming and other applications.

Known as a pioneer in temperature control technology, Gammaflux developed the first products to anticipate temperature changes, sense wiring and heater problems, and react instantly to avoid serious mold damage. All Gammaflux systems feature the company’s unique Triangulated Control Technology® for the best temperature sensing, controlling, and actuation capabilities.

The company’s product line includes:

LEC – for up to 24 zones of temperature control

G24 – for 18 to 480 zones of temperature control

Gammaflux Controllers and Polyshot Hot Runner systems are a perfect match for your molding needs.

LEC Temperature Controller

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Designed for smaller hot runner system applications, the LEC is offered with 2, 6 and 12 zone enclosures. A network module allows you to link two 6 or 12 zone enclosures together for up to 24 zones of control. The LEC features a modular design for simple control card removal, addition or replacement.

Each 6 and 12 zone LEC enclosure comes prewired, ready to accept an optional network module. With a network module, users can connect the LEC to a laptop or PC to take advantage of advanced features including; security settings, remote input, and unique Gammaflux software including Gammavision (SPC data/graphing analysis), Mold Doctor (advanced mold troubleshooting), and Field Calibrator. The network module also enables a link to plant monitoring systems.

Learn more about Gammaflux’s LEC temperature controller here.

G24 Temperature Controller

Gammaflux’s G24 Temperature Controller has 18 to 480 zones of temperature control and features the following benefits:

Easier to Use | Less Expensive | Smaller | Faster | More Flexible/Standardization | Improved Interlocks | Mold Doctor® | Early Material/Leak Detection

Learn more about Gammaflux’s H24 temperature controller here.

Learn more about the integrated temperature or stand-alone sequential valve gate control (SVGC) applications of the G24 here.

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