Tracon GPT 230 Heat–Trace Control

Dual–Point General Purpose Heat–Trace Control

Features & Benefits

  • Dual channel heat trace capabilities allows for complete control and monitoring of two separate channels from one unit
  • Adjustable temperature setpoint allows precise control of a wide range of processes
  • Can use an NEC Class 2 temperature sensors with up to 2,000 ft. cable for enhanced installation options
  • Two Thermistor temperature sensors with 20 ft. cables included for applications of −40 °F to 230 °F (−40 °C to 110 °C)
  • RTD input allows higher accuracy and extreme–temperature applications
  • The unit can accommodate RTD sensors with 2–, 3–, or 4–wire configuration
  • Temperature display for accurate adjusting and monitoring
  • Load current display for accurate adjusting and monitoring
  • Ground fault current display for accurate monitoring, protection, and alarm
  • Adjustable alarm thresholds for excess ground fault current, load current, and temperature
  • Alarms indicated with panel display and relay contact for remote signaling
  • A Fault Mode setting which can be set to energize or de-energize the heaters during a sensor failure
  • Fire Protection Mode maintains heater operation for use in critical fire protection systems
  • Durable weather–resistant NEMA 4X IP66 enclosure permits indoor or outdoor installation



GPT 230 Datasheet GPT 230 Manual GPT 230 Manual Addendum GPT 230 Installation Sheet

The GPT 230 Dual Channel Heat–Trace Control is a dual–point microprocessor–based heat–trace control thermostat. It is ideal for applications which require two independent heater–control Channels with Ground–Fault Equipment Protection (GFEP). Ideal uses include freeze protection, hot water temperature maintenance, grease line trace, tank heating, and other temperature monitoring and control applications.

The GPT 230 Heat–Trace Control operates from the heater’s power source. A universal power supply allows the GPT 230 to operate from 100 V ac to 277 V ac. It can independently or jointly control two resistive loads up to 30 amps each.

Adjustable Temperature Setpoint and Alarms
The temperature setpoints are adjustable from −99.9 °F to 999 °F (−73.3 °C to 537.7 °C) to a tenth degree resolution.

Sensor Inputs
The GPT 230 comes with two 100K ohm thermistor temperature sensors with 20 ft. jacketed cables. The included sensors have an operating range of −40 °F to 230 °F (−40 °C to 110 °C). The GPT 230 can also use 2–, 3–, or 4–wire RTD sensors for systems requiring high–temperature sensing. Two temperature sensor inputs are provided, and the channels can operate independently or from one sensor.

Precision Monitoring and Control
The GPT 230 monitors temperature, load current, and ground leakage current. Alarms include high temperature, low temperature, high load current, low load current, ground fault, sensor fault, internal fault, and power fail. These alarms are easy to adjust and observe from the front panel. The GPT 230 can be set to energize or de-energize the heaters during a sensor fault.

Ground–Fault Equipment Protection
The GPT 230 Heat–Trace Control includes integral GFEP for each channel. This eliminates the extra expenses associated with having to provide separate GFEP components in the circuit panel. The GPT 230 normally disconnects power immediately to the affected zone when ground fault current exceeds the set value. But if it is set to Fire Protect mode, for critical fire protection systems, then it will generate the alarm but power will be maintained to prevent freezing.

Automatic GFEP Circuit Self–Test
To ensure continued safe operation, the GPT 230 performs a self–test of the GFEP circuits when power is first applied, along with a load ground fault test, and this repeats periodically thereafter at an adjustable interval.

For complete information describing its application, installation, and features, please contact Customer Service.


Certifications UL 60730–1, UL 1053, CSA E60730–1:13
Area Of Use Nonhazardous Locations
Operating Temperature Range −40 °F to 122 °F (−40 °C to 50 °C)
Dimensions 9.0″ (W) 12 4/5″ x (H) x 5 9/10″ (D)
229 mm (W) x 325 mm (H) x 150 mm (D)
Protection NEMA 4X, IP66
Cover Attachment Polycarbonate cover
Cable Entries Two liquid-tight cable glands installed for Two liquid-tight cable glands installed for sensor and alarm leads, cable diameter 0.08” to 0.24” (2 mm to 6 mm)

Two 1.046″ holes to accommodate ¾” conduit fittings for power wiring connections

Material Polycarbonate
Weight 5.8 lb. (2.63 kg)
Mounting Wall mount with flanges
Wiring Terminal Ratings
Power  Barrier Strip Terminals for Line, Neutral, and Ground; use 10 AWG wires rated for at least 194 °F (90 °C)
Sensors Terminal Block, rising cage clamp, 12–28 AWG leads
Alarm Relay Terminal Block, rising cage clamp, 12–28 AWG leads
User Interfaces
DIP Switches RTD wiring configuration
Panel lockout
Parameter Settings For Each Zone
Temperature Setpoint Heat ON Adjustable −99.9 °F to 999 °F  (−73.3 °C to 537.7 °C)
Temperature Setpoint Heat OFF Adjustable −99.9 °F to 999 °F  (−73.3 °C to 537.7 °C)
Low–Temperature Alarm Threshold −99.9 °F to 999 °F  (−73.3 °C to 537.7 °C)
Default 35 °F (−1.7 °C)
Low–Temperature Alarm Delay 0 s to 3000 s 0 s to 3000 s
Default 300 s
High–Temperature Alarm Threshold −99.9 °F to 999 °F  (−73.3 °C to 537.7 °C)
Default 140 °F (60 °C)
High–Temperature Alarm Delay 0 s to 3000 s
Default 300 s
Low–Current Alarm Threshold 0.0 A to 10.0 A
Default 0.1 A
Low–Current Alarm Delay 0 s to 300 s
Default 5 s
High–Current Alarm Threshold 0.0 A to 55.0 A
Default 30.0 A
High–Current Alarm Delay 0 s to 600 s
Default 300 s
Ground Fault Limit Current 1.0 mA to 300.0 mA
Default 30 mA
Self–Test Interval 1 h to 250 h when enabled
Default 24 h
Temperature Unit °F or ° C
Default °F
Status Indicator Power (Green)
Heater (Yellow)
Low Temperature (Blue)
Summary Alarm (Red)
Display 27″ OLED graphic 128×64
Summary Alarm Relay Reporting Low temperature
High temperature
Low load current
High load current
High ground fault current
Stuck relay
Sensor fault
Internal fault
Control Ratings
Temperature Accuracy +/− 2 °F (1 °C)
Temperature Sensors
Temperature Inputs (Included) Two Thermistors: 100k ohms at 25 °C,
range −40 °F to 230 °F (−40 °C to 110 °C),
20ft Lead (25076)RTD Sensor: Platinum,
Alpha = 0.00385, ITS–90,
100 ohms at 0 °CInput supports
2–wire, 3–wire, or 4–wire connection
Sensor operates at 1 mA
(GFEP) Ground–Fault Equipment Protection
Range Adjustable 1mA to 300 mA
Default 30 mA +/- 2%
Automatic Self Test Verifies GFEP functionality every 24 hr., when the load is turned on, and when there is a load supplied
Supply Voltage 100 – 277 V ac 50/60 Hz
Controller Power Consumption 5 W maximum, 2 W idle
Load Rating 30 A, 100 – 277 V ac resistive


Order Number Description
25171 Tracon MODEL GPT 230 Dual-Point General Purpose Heat–Trace Control
25076 Temperature Sensor (included)
25300 GPT 230 Installation Sheet
25167 GPT 230 Installation and Operation Manual