Steca TR 0502 U
Description
The Steca TR 0502 U controller was developed specifically for the North American market as a variant of the basic Steca TR 0502 controller. Special approval (ETL mark) via a testing laboratory recognised in the United States as an NRTL (Nationally Recognized Testing Laboratory) means that the relevant safety standards and minimum requirements of the North American market have been met.
In the installation housing, the device connection is created either as a plug & play solution for grid and pump connections or alternatively with 1/2 inch apertures.
This controller offers everything required to operate your solar thermal system safely and continuously. The Steca TR 0502 U controller 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 large graphic display shows animated control loops to visualise the operating states of the respective system. The clear display guarantees easy operation through the consistent use of pictograms. Pre-programmed equipment systems enable universal use. Steca TR 0502 U has five inputs for temperature or pulse detection and two partially speed-controlled outputs for controlling pumps or switching valves.
Features
Product features
- Compact, multipart designer casing
- Electronic speed control
- High level of operational safety through fault diagnosis
- Hours-of-operation logger
- Software update possible
- Storage tank target temperature loading
- Daily pump start
- Plug & play for 120 V AC mains and pump connections in installation casing
- Screwed connections facilitate fast sensor installation
- Integrated Steca TPC 1 bus
Displays
- Multifunction graphical LC display with backlighting
- Animated representation of the systems and operating states
Operation
- Multilingual menu navigation
- Side switch for manual, auto, off
Options
- Installation casing with 1/2 inch cut-outs as an alternative to plug & play
Functions
- Heat quantity (Grundfos Direct Sensors™, pulse generator, determination)
- Heating return increase
- Reduction of stagnation phases
- Holiday (storage tank recooling)
- Circulation (controlled by temperature / time / pulse)
- Back-up heating
- Solid fuel boiler
- Storage tank quick charge
- Thermostat
- Differential thermostat
- Timer
- Interval / tube collector
- Anti-freeze
- Display storage tank top
- Alarm output
- Two loading zones
Downloads
Technical data
| TR 0502 U | |
|---|---|
| System voltage | 120 V AC, 60 Hz |
| System voltage optional | 240 V AC, 60 Hz |
| Standby | 1.57 W [0.003 HP] |
| Temperature control class | I |
| Energy efficiency | 1 % |
| Number of inputs | 5 |
| Inputs | 4 x temperature (Pt1000), 1 x temperature (Pt1000) or pulse |
| Additional inputs | 1 x Grundfos Direct Sensors™ (temperature / flow rate) |
| Number of outputs | 2 |
| Outputs | 1 x triac for speed control (R1), max. 230 W / 0.3 HP (120 V AC); 1 x switch output relay (R2), max. 400 W / 0.5 HP (120 V AC) or R2 voltage free |
| Additional output | 1 x alarm output |
| Line cord | 75 inch, 3 x 18 AWG at 221 °F |
| Hydraulic schemes | 14 |
| Ambient temperature | 0 °C [+32 °F] … +45 °C [+113 °F] |
| Interfaces | RS-232, RS-485 (Steca TPC 1 bus) |
| Degree of protection | IP 20 / DIN 40050 |
| Dimensions (X x Y x Z) | 170 x 178 x 90 mm [6.69 x 7.00 x 3.54 inch] |
| Weight | 1400 g [45.01 oz] |