NA337 is a temperature controller with functions like temperature display, constant temperature control for cooling and heating, fan control, and defrost control. It also has phase loss and phase sequence protection, suitable for temperature control and protection applications.
The NA337 temperature controller offers heating, cooling, and automatic mode conversion with fan and defrost control. It includes temperature display, setpoint range, and protection features such as compressor delay and phase‑loss alarms.
The manual details basic operation, advanced parameter adjustments for professionals, wiring diagrams, and safety precautions to ensure proper installation and maintenance. This manual is written in Chinese.
| Temperature display range | -50~125 °C (0.1 °C steps between -9.9~99.9 °C, otherwise 1 °C) |
|---|---|
| Temperature setting range | -45~120 °C (0.1 °C steps between -9.9~99.9 °C, otherwise 1 °C) |
| Power supply voltage | AC 380 V ±10 % 50 Hz, three‑phase |
| Operating environment | Temperature -10 °C~45 °C, humidity ≤85 %, no condensation |
| Output contact capacity | 3 A / 250 VAC (pure resistive load) |
| Temperature sensor type | NTC R25=5 kΩ, B(25/50)=3470 K |
“EE” indicates a short circuit in the temperature sensor, while “‑EE” indicates an open‑circuit (sensor disconnected).
Hold the “” key for 5 seconds to enter defrost mode; holding the key again for 5 seconds forces the defrost to end.