Steca/Solene TR 0301 U
Temperature Differencial Controller
Model TR 0301 U differential temperature control provides automatic, safe and reliable operation of domestic solar water heating systems.
The TR 0301 U output is wired to a pump that circulates the heat transfer fluid between the solar thermal collectors and the storage tank during the course of the day.
This microprocessor-based TR 0301 U utilizes two RTD (resistance temperature detector) type sensors to monitor collector and tank temperatures with digital accuracy.
The LCD gives the homeowner a variety of real time information including system temperatures at up to three separate locations. The consistent use of simple pictograms ensures ease of operation and troubleshooting.
In addition to the primary function of turning the circulating pump on and off during the day, the TR 0301 U provides important diagnostic and safety functions. For example, the LCD pictograms will indicate fault conditions such as sensor shorts or pump failures. The installation manual also clearly describes the fault symptoms, possible causes and remedies.
The TR 0301 U features a total of three inputs for recording temperature and one 120 VAC output for the circulating pump. Varistors protect the sensor inputs against high voltage spikes. The load side is fuse protected. The control package includes two RTD type sensors, a seven foot line cord and a spare fuse.
An optional third sensor displays the upper tank temperature and eliminates the need for an analog thermometer and fittings. The numerous additional features of the TR 0301 U include an adjustable high limit (32° F - 205° F), an evacuated tube collector function, vacation overheat protection to minimize collector stagnation, and a freeze-recirculation option.
Temperatures can be displayed in either Fahrenheit (°F) or Celsius (°C).
• Digital accuracy
• LCD provides real time operating temperatures up to 3 locations
• Animated representation of system operation
• Sophisticated monitoring and fault diagnostics
• Fused output protection for pump circuit
• Varistor high voltage spike protection
• RTD type 1000 Ù sensors
• Adjustable high limit temperature of storage tank
• Evacuated tube & freeze recirculation functions
• Vacation overheat protection
• Accessible side-mounted on, off, auto switch
• Three temperature sensor inputs, one 120 VAC output
• Pump protection activated when collector reached 266 °F
Steca/Solene Controller Technical Data TR 0301 U
||120 VAC, 60 Hz|
||= 0.001 HP|
|3 inputs for temperature recording
Switch relay; Switching performance max. 0.5 HP (120 V~); 1 HP (240 V~)
Fuse: Littelfuse 215.004
||7', 18 AWG rated at 221 °F|
||Animated LCD display, 2-color background|
||IP 20/DIN 40050|
|Permitted ambient temperature
||32 to +113 °F (0 to +45 °C)|
||Wall-mounted with screws|
||19.54 oz (0.55 kg) include cable|
||Recyclable 3-piece plastic case|
||6.3'(W) x 6.18'(H) x 1.85'(D) (160 L x 157 B x 47 H mm)|
|Temperature sensors 2x Pt1000-Probe
NOTE: Control and Sensors utilize a 1,000 Ohm (1K) input; Ohms increase as temerature increases. 10k controls and/or sensors are not compatible or interchangable wih Steca/Solene.
Collector sensor: 59 inch (1.5 m) silicone cable with bushing (Measuring range up to +356 °F (+ 180 °C))
Donwload PDFs »
Steca Solar Control Owner's Manual
Steca Solar Control Specifications
Product Manufacturer: Steca GmbH
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