The Siemens RCC20 manual explains installation, wiring, operation modes and technical specifications for the room temperature controller.
The RCC20 is a room temperature controller for two‑pipe fan coil units with electric heating. It controls valve actuators, electric heaters and three‑speed fans, offering automatic heating/cooling switching and several operating modes such as normal, energy‑saving and frost protection.
The manual provides detailed wiring diagrams, installation guidelines, DIP switch settings, and technical data including power ratings, temperature ranges and certification information, helping installers and technicians configure and maintain the device safely.
| Power supply voltage | AC230V ±10/‑15% |
|---|---|
| Maximum power consumption | 6VA |
| Operating temperature range | 8 °C … 30 °C |
| Control accuracy at 25 °C | ±0.7 K |
The controller offers Normal, Energy‑saving, Frost protection and Standby modes, selectable via DIP switches or external control signals.
Fan speed is controlled by outputs Q1, Q2 and Q3, each providing an AC230V switching signal for the three‑speed fan.
The device complies with CE certification, EMC standards, low‑voltage directives and IEC 721‑3 series for climate, mechanical and storage conditions.