This document introduces the room temperature controller RAA20, released by Siemens Building Technologies in 2003. The controller is suitable for single heating or cooling systems and can be used in residential buildings and light industrial buildings. It features two-position switch control and adjustable inflation membrane to maintain the selected temperature value.
The RAA20 is a room temperature controller for single‑heat or single‑cool systems. It maintains a selected temperature by switching heating or cooling outputs and can be used with zone valves, boilers, fans and pumps in residential and light‑industrial buildings.
The manual covers installation guidelines, wiring, technical data, climate and mechanical conditions, certification, and dimensions. It also notes that the unit is maintenance‑free and must be installed by qualified personnel following local electrical codes. This manual is written in Chinese.
| Operating voltage | AC 24–250 V |
|---|---|
| Frequency | 50/60 Hz |
| Switch deviation | ≤ 1 K |
| Set‑point range | 8 … 30 °C |
| Current at 250 V | 0.2 … 6 A |
| Maximum humidity | < 95 % RH |
The controller operates on AC voltage from 24 V to 250 V.
Install the controller about 1.5 m above the floor.
No, the controller is maintenance‑free.