Solar thermal systems
Solar thermal systems convert solar irradiation into heat so that it can be used to heat domestic hot water or for back-up heating.more
Steca TR 0502 U
5 inputs, 2 outputs
- Compact, multipart designer casing
- Multifunction graphical LC display with backlighting
- Animated representation of the systems and operating states
- Multilingual menu navigation
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Description
The Steca TR 0502 U controller was specially developed for the North American market based on the Steca TR 0502 basic controller. With its special certification (ETL label) from a Nationally Recognized Testing Laboratory (NRTL) in the US, the controller meets the safety standards and minimum requirements of the North American market.
The equipment is connected inside the installation casing using either a plug & play solution for the mains and pump connections or alternatively 1/2 inch cut-outs.
This controller provides everything to operate your solar thermal system safely over a long service life. The Steca TR 0502 U controller monitors and controls solar thermal systems with two differently oriented collector arrays and a maximum of two domestic hot water or buffer storage tanks. The large graphic display shows the animated control circuits, which allows you to view the operating statuses of each system. The clearly arranged display ensures easy operation using pictograms. Pre-programmed systems enable universal usage. The Steca TR 0502 U controller has five inputs for recording temperatures or pulse values, as well as two outputs (one is speed-controlled) 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
Product data sheet
Manuals
Product pics, technical drawings, etc.
- Steca TR 0502 U product pic 3D · jpg, 300 DPI, high quality · 0.017 MB
- Steca TR 0502 U product pic 3D · jpg, 72 DPI, web quality · 0.016 MB
- Steca TR 0502 U product pic · jpg, 300 DPI, high quality · 0.021 MB
- Steca TR 0502 U product pic · jpg, 72 DPI, web quality · 0.016 MB
- Steca TR 0502 U product pic drawing · jpg, 300 DPI, high quality · 0.039 MB
- Steca TR 0502 U product pic drawing · jpg, 72 DPI, web quality · 0.026 MB
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] |