RDF20 is a room temperature controller with a liquid crystal display that can be used for electric heated two-pipe fan coils, electric heated direct expansion compressors, single-stage compressors and electric heating, three-speed fans. It can control room temperature or return air temperature and has automatic cold/heat conversion function. The product's applicable working voltage is AC230V.
The RDF20 is a room temperature controller with LCD display, designed for two‑pipe fan coil units, direct expansion units and single‑stage compressors. It provides heating, cooling and automatic mode switching, with optional energy‑saving and standby functions.
The manual covers functional description, wiring, DIP switch settings, parameter configuration, installation guidelines, technical data and safety information for proper commissioning and maintenance.
| Power supply voltage | AC 230 V ±10/‑15 % |
|---|---|
| Maximum power consumption | 6 VA |
| Control output rating (Y11‑N, Y12‑N, Y21) | AC 230 V, max 5 VA (3 VA typical) |
| Control accuracy | ±0.5 K |
Modify parameter P09 to correct the sensor offset when the displayed temperature differs from a reference.
The fan continues to run for 60 seconds after heater shutdown, adjustable via parameter P21.