The TECH i-1 CWU This versatile heating controller is designed for the precise control of three- or four-way mixing valves. It is ideally suited for heating systems with radiators, underfloor heating, or backflow prevention, and offers comprehensive control and protection functions for efficient and safe operation.
Highlights & Advantages
⭐ Precise control of mixing valves for constant flow temperatures
⭐ Integrated return and boiler protection for system safety
⭐ Weather-compensated control with heating curve and weekly program
⭐ Control of heating and hot water pumps possible
⭐ Expandable to up to three mixing valves via additional modules
Detailed description
Area of application & Target audience
The TECH i-1 CWU was developed for modern heating systems in single-family and multi-family homes. It is suitable for radiator circuits, underfloor heating systems, and systems with return flow protection, and can be used for both new builds and renovations.
Everyday benefits
By automatically adjusting the flow temperature to the outside temperature, the controller ensures consistent heating comfort and reduces unnecessary energy consumption. Weekly programs allow for demand-based temperature control throughout the day and week.
Technology & equipment
The controller operates three- or four-way mixing valves, including the valve pump and hot water pump. Multiple temperature sensors (boiler, valve, return, outdoor, hot water) enable precise system monitoring. A clear LCD display and intuitive menu structure simplify operation.
Efficiency & Plant protection
Features such as boiler protection, return flow protection, and maximum floor temperature safeguard the heating system from damage caused by excessively low or high temperatures. The pump's anti-stop function prevents it from seizing up outside the heating season.
compatibility & System integration
The TECH i-1 CWU can be expanded with room thermostats (RS communication or two-point), GSM modules, and internet modules. Additionally, up to two further mixing valves can be controlled via expansion modules.
Technical data
| feature | Value |
| Manufacturer | TECH Controllers |
| Model | i-1 CWU |
| Product type | Mixing valve regulator |
| Supply voltage | 230 V ±10 %/50 Hz |
| Power consumption | 3 W |
| Operating temperature | 5–50 °C |
| Max. load pump output | 0.5 A |
| Max.Valve outlet load | 0.5 A |
| Potential-free contact | 230V AC/0.5A or 24V DC/0.5A |
| Temperature range sensors | -30 to 99 °C |
| Security | 1.6 A |
| Standards | CE, ErP, PN-EN IEC 60730 |
Scope of delivery
Accessories/Recommendation
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Outdoor temperature sensor
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Room thermostat TECH RS
-
Internet module TECH ST-505
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GSM module TECH ST-65
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Expansion modules for additional mixing valves
(Suitable products in the range of gemashop.de)
Assembly & Safety instructions
Installation and commissioning must be carried out exclusively by a qualified specialist company. The device must be disconnected from the power supply before any work is done on the electrical installation. Sensors must be positioned correctly according to the installation instructions.
FAQ
For which valves is the TECH i-1 CWU suitable?
For three- and four-way mixing valves in heating systems.
Can the controller operate underfloor heating?
Yes, with a special floor mode and maximum temperature limit.
Is weather-compensated control possible?
Yes, with an outdoor sensor and adjustable heating curve.
Is it possible to prioritize hot water?
Yes, via different pump operating modes including boiler priority.
Is remote monitoring possible?
Optionally via GSM or internet modules.
How many valves can be controlled?
One integrated valve and up to two additional valves via expansion modules.
Conclusion
The TECH i-1 CWU is a high-performance mixing valve controller for demanding heating systems and offers extensive control, protection and expansion functions for efficient and safe operation.
