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Steca TR A502 TT U

5 inputs, 2 outputs

Description

The Steca TR A502 TT U controller is the ideal solution for all 2-circuit systems. It monitors and controls solar thermal systems with up to two differently oriented collector arrays or a maximum of two domestic hot water or buffer storage tanks.

The Steca TR A502 TT U is also characterised by the compact housing typical of this series and can therefore be perfectly integrated into solar stations. Wall or top-hat rail mounting is also possible at any time. Thanks to the variable input voltage range, universal and worldwide use is assured.

The solar thermal controller has five inputs for temperature and pulse detection as well as two outputs. These can be optionally used to control (0-10 V) high-efficiency pumps. The equipment also includes an additional alarm output. A graphically animated, clear display visualises the operating states.

The integrated heat meter enables the solar yields to be recorded with imputed values or with the aid of an external pulse generator.

The versatile controller has eleven pre-programmed systems and is extremely easy to configure and operate.

The specially designed switched-mode power supply, the basis for all products in this controller series, also guarantees the highest possible efficiency and economical operation with the Steca TR A502 TT U. This is particularly characterised by the extremely low controller self-consumption level. The innovative electronic load control protects against overloading and installation errors.

In order to ensure the continuous and safe operation of the entire solar system, the Steca TR A502 TT U takes on important system monitoring and safety functions in addition to the controller operation. Special error messages are displayed for quickly rectifying faults.

Steca TR A502 TT U technische Zeichnung

Features

Product features

  • Compact, multipart designer casing
  • Installation versions: Solar pump stations, wall installation, mounting rails
  • Wave packet (Triac) and 1-10 V control signal ensure electronic RPM control
  • High level of operational safety through fault diagnosis
  • Hours-of-operation logger
  • Software update possible
  • Daily pump start
  • Screw terminals allow universal and rapid installation
  • Low power consumption thanks to universal and widerange switched-mode power supply
  • Variable input voltage range for worldwide controller deployment
  • Electronic overloading control and protection

Displays

  • Multifunction graphical LC display with backlighting
  • Animated representation of the systems and operating states

Operation

  • Non-verbal menu navigation
  • Manual switch for manual, auto, off

Functions

  • Heat quantity (pulse generator, determination)
  • Display showing CO2 savings
  • Drain back
  • Reduction of stagnation phases
  • Active cooling (e.g. to avoid stagnation)
  • Holiday (storage tank recooling)
  • Circulation (controlled by temperature / time)
  • Back-up heating
  • Solid fuel boiler
  • Storage tank quick charge
  • Thermostat
  • Differential thermostat
  • Interval / tube collector
  • Anti-freeze
  • Display storage tank top
  • Alarm output

Downloads

Product data sheet

  •  Steca TR A502 TT U productdatasheet DE · pdf · 0,989 MB
  •  Steca TR A502 TT U productdatasheet EN · pdf · 0.989 MB

Manuals

  •  Steca TR A502 TT U manual EN · pdf · 1.914 MB

Product pics, technical drawings, etc.

  •  Steca TR A502 TT U product pic drawing · jpg, 300 DPI, high quality · 0.550 MB
  •  Steca TR A502 TT U product pic drawing · jpg, 72 DPI, web quality · 0.291 MB

Technical data

 TR A502 TT U
System voltage
115 V AC … 230 V AC, 50 Hz / 60 Hz
Standby
0.76 W [0.001 HP]
Temperature control class
I
Energy efficiency
1 %
Number of inputs
5
Inputs
4 x temperature (Pt1000), 1 x temperature (Pt1000) or pulse
Number of outputs
2
Outputs
2 x triac for speed control (R1, R2), max. 130 W /0.17 HP (120 V AC) or 0-10 V control signal for pump speed (0-10 V R1, 0-10 V R2) / PWM control signal on request
Additional output
1 x potential-free switching output for the safety extra-low voltage
Hydraulic schemes
11
Ambient temperature
0 °C [+32 °F] … +50 °C [+122 °F]
Degree of protection
IP 22 / DIN 40050 [without front panel: IP 20]
Dimensions (X x Y x Z)
110 x 160 x 51 mm [4.33 x 6.30 x 2.01 inch]
Weight
350 g [12.35 oz]
 
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