Key facts
- Brand
- Siemens
- Model
- RCC20
- Category
- Other
- Industry
- Industrial
- Documents
- 2
- Languages
- EN · ZH
- Last added
- 2000-01-01
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Siemens RCC20 Room Temperature Controller User Manual
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.
Siemens RCC20 specifications
| 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 |
Source: Siemens RCC20 Room Temperature Controller User Manual
All Siemens RCC20 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What operating modes are available on the RCC20?
The controller offers Normal, Energy‑saving, Frost protection and Standby modes, selectable via DIP switches or external control signals.
What are the wiring connections for the fan speed outputs?
Fan speed is controlled by outputs Q1, Q2 and Q3, each providing an AC230V switching signal for the three‑speed fan.
How does the RCC20 switch between heating and cooling modes?
The controller automatically changes mode when the measured temperature deviates from the set‑point by half the conversion error; heating uses a 1 K or 4 K error, cooling uses 0.5 K or 2 K.
How is fan speed controlled?
Fan speed is set by the three output contacts Q1, Q2 and Q3; each output selects a different speed level.