This document introduces the main features and technical specifications of the NA222 cold and hot constant temperature controller, including automatic switching between refrigeration and heating modes, compressor startup delay protection, and temperature probe abnormal alarm. The temperature display range of the controller is -50°C to 125°C, and the temperature setting range is -45°C to 120°C. The power supply voltage is AC 220V±10% or 380V±10%, and the output contact capacity is 20A/250VAC. The controller is suitable for use in environments with temperatures from -10°C to 45°C and humidity ≤85% without condensation. It uses an NTC temperature sensor and complies with the standard Q/320585 XYK 01 (NA222-CHT).
The NA222 controller is a temperature‑control device that can operate in cooling, heating, and mixed modes. It features temperature display, set‑point adjustment, time‑delay protection, and alarm functions. The manual describes the main functions, technical specifications, and wiring requirements.
The guide explains how to use the front‑panel keys, interpret indicator LEDs, and perform advanced operations such as internal parameter programming. It also covers safety precautions, grounding, and recommended operating environment conditions. This manual is written in Chinese.
| Power supply | 220 V ±10 % or 380 V ±10 % 50 Hz |
|---|---|
| Current rating | 20 A / 250 V AC |
| Temperature sensor type | NTC R25 = 5 kΩ |
| Operating temperature range | -10 °C to 43 °C |
The code “BB” means the temperature sensor is short‑circuited.
If no key is pressed for about 30 seconds, the controller automatically exits the setting mode and returns to normal operation.