Close Control Unit

Hisurp is a professional close control unit manufacturer in China, offering customized climate control solutions for laboratories, food workshops, pharmaceutical rooms, archives, precision manufacturing spaces, and industrial control environments.
The air-cooled precision series is designed for buyers who need constant temperature and humidity control without building a dedicated cooling water system. By using direct expansion refrigeration, the unit simplifies system architecture while maintaining the precision required in technical and process spaces.

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Product Introduction

Known as one of the most competitive manufacturers and suppliers, Hisurp have our own factory. Close Control Unit is a specialized refrigeration system capable of maintaining extremely stable temperature, humidity, and airflow in specialized environments.

Close Control Units are widely used in:

Data centers and server rooms
Telecom switching rooms
Electrical control rooms
Laboratories and cleanrooms

The Close Control Unit supports:

Cooling capacity from 7kW to 300kW
Temperature accuracy of ±1°C
Humidity control range of 50%–70% RH
Humidity accuracy of ±5% to ±10% RH
Direct and ducted air supply
Microprocessor controller as standard
Optional touch screen, PLC, and RS485 Modbus communication
Optional low-GWP refrigerant selection

From a procurement perspective, global buyers often evaluate:

Ease of installation
Customization capability
Control options
Maintenance accessibility
Suitability for retrofit and standalone rooms

Product Pics

Why Hisurp

Hisurp addresses these concerns with a strong manufacturing base of over 150,000 m², more than 400 employees, 123 patents, CNAS-certified testing facilities, and decades of industrial HVAC experience.

For customers in Europe, South America, Southeast Asia, the Middle East, and other markets, Hicon can provide tailored Air Cooled Precision Air Conditioner configurations based on project load, room cleanliness requirements, local power supply, and installation conditions.

Some Data Center Projects

* Zhongce Rubber (Thailand) Co., Ltd. air conditioning computer room rotary heat recovery equipment (Thailand Rayong Industrial Park, Amata Industrial City, Thailand, 2022)
* Precision Air Conditioner Water Cooled DX Units for Tianjin-Qinhuangdao High-speed Railway Station
* Precision Air Conditioner Air Cooled DX Unit for Zhengzhou-Xinzheng Airport Intercity Railway dispatching station
* Chilled Water Close Control Unit Twin- Sources Series for Fuzhou Cloud Computing Data Center Project

FAQ

What is the difference between CCU/CRAC and comfort air conditioning?

Purpose
CCU/CRAC: Designed for equipment cooling (data centers, telecom rooms)
Comfort AC: Designed for human comfort (offices, homes)

Operation Time
CCU/CRAC: 24/7 continuous operation
Comfort AC: Intermittent use

Temperature Control
CCU/CRAC: High precision (±1°C)
Comfort AC: Lower precision (±2–3°C)

Heat Type
CCU/CRAC: Handles high sensible heat (>80%)
Comfort AC: Mix of sensible + latent heat

Airflow
CCU/CRAC: Large air volume for uniform cooling
Comfort AC: Lower airflow, focused on comfort

How Does a Close Control Unit Work?

A Close Control Unit works through a controlled refrigeration and airflow system:

Draws hot air from the equipment room
Cools air via evaporator (DX or chilled water system)
Removes excess humidity if needed
Reheats air (optional) to maintain stable humidity
Supplies cooled air evenly back into the room

The goal is stable temperature + controlled humidity + uniform airflow.

What are the key components of a CCU?

A typical CCU system includes:

Compressor：Drives the refrigeration cycle (DX systems)
Evaporator Coil：Absorbs heat from indoor air
Condenser：Releases heat (air-cooled or water-cooled)
Expansion Valve：Regulates refrigerant flow
Fans / Blowers：Deliver high air volume for circulation
Controller System：Microprocessor-based, ensures precise control
Humidifier / Heater (Optional)：Maintains required humidity levels

What are the different types of CRAC units?

By Cooling Method
Air-Cooled CRAC：Uses outdoor air to reject heat；Simple installation, widely used
Water-Cooled CRAC：Uses cooling water or cooling tower；Higher efficiency in large systems
Chilled Water (CRAH)：Uses centralized chilled water system；Ideal for large data centers

By Airflow Design
Upflow Units：Air supplied upward into ducts；Suitable for ceiling return systems
Downflow Units：Air supplied under raised floors；Common in data centers

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