Outdoor Module VRF Air Conditioning System

Working Principle Specification Application Download Inquire Now

Outdoor Module VRF Air Conditioning System Working Principle

The VRF air conditioners, also known as "one-to-many," is a type of system where one outdoor unit is connected to several indoor units. Each indoor unit can operate independently or be controlled together. The system has an outdoor unit connected by pipes to indoor units that have components like outdoor heat exchangers, compressors, and other parts. The indoor units consist of fans and direct cooling elements. Using the pipes, the outdoor unit can supply cooling liquid to many indoor units. It controls the compressor's cooling fluid circulation and the flow into various indoor heat exchangers to meet the indoor cooling and heating needs.

The system's working principle is simple: the indoor temperature sensor controls the valve on the indoor unit's cooling pipe. By adjusting the pressure, the system can control the outdoor unit's compressor speed or change its operating mode to adjust the cooling capacity according to the load.

As a professional VRF air conditioner supplier, AIRTS delivers reliable and high-efficiency climate solutions for modern commercial and residential buildings. The AX Series modular frequency outdoor units are engineered to meet the demands of large-scale, variable-load environments while optimizing space, cost, and energy performance.

The multi-unit system has some key features:

Significant energy savings: The system adjusts the compressor speed and refrigerant flow automatically to operate more efficiently, reducing energy consumption during lighter use and lowering overall costs.

Space-saving design: The outdoor units, usually installed on the roof, take up no extra space. With just refrigerant and water pipes, the system's layout can save on building height and costs compared to water systems.

Easy installation and reliable operation: Compared to centralized water systems, the multi-unit system has a simple setup, making it suitable for homes. With fewer components, the system runs reliably and safely.

Meeting different room requirements: The system can be arranged to meet various room needs. In some setups, while some units cool, others can heat simultaneously. In winter, the system can cool one area and heat another, reducing energy consumption and meeting diverse air conditioning needs.

Outdoor Module VRF Air Conditioning System

Outdoor Module VRF Air Conditioning System Application

Office buildings

Hotels and resorts

Shopping malls

Hospitals and medical facilities

High-end residential complexes

Outdoor Module VRF Air Conditioning System Functions

Fall prevention warning monitoring

Working data collection and analysis

Wireless intelligent control

Energy saving, lower investment

Support full AirTS products linkage control

Filter net self-cleaning

Outdoor module frequency unit

R410A as the medium

Specification

Outdoor Module Frequency			AirTS- 250AX	AirTS- 280AX	AirTS- 335AX	AirTS- 400AX	AirTS- 450AX	AirTS- 500AX	AirTS- 560AX	AirTS- 615AX	AirTS- 670AX	AirTS- 730AX	AirTS- 785AX	AirTS- 850AX	AirTS- 900AX
Power		HP	8	10	12	14	16	18	20	22	24	26	28	30	32
Power supply			Three-phase and five-wire system 380V3N 5%~50HZ
*1 Rated refrigerating capacity		kW	25.2	28.5	33.5	40	45	50.4	56	61.5	68.5	73.5	78.5	85	90
*2 Rated heating capacity		kW	27	31.5	37.5	45	50	56	63	69	75	81.5	87.5	95	100
Rated power consumption	Cooling	kW	5.45	6.75	8.4	10.25	12.1	13.5	16	17.87	18.6	19.27	20.95	22.85	24.65
Rated power consumption	Heating	kW	5.41	6.6	8.3	10.28	12.15	13.6	15.6	17.3	17.6	19.01	20.55	23.05	24.15
Machine size	L×W×H	mm	930×860×1690			1240×860×1690			1500×860×1690			1900×860×1690
APF			5.3	5	4.9	4.9	4.8	4.7	4.75	4.7	4.5	4.6	4.6	4.55	4.5
Standard circulating airflow		m3/h	12000			13980			25800			27000
*3 Operating sound		dB	56	56	57	59	60	61	62	62	62	62	63	64	64
On-site piping size	Liquid pipe	mm	φ9.52	φ9.52	φ12.70	φ12.70			φ15.88			φ19.05
On-site piping size	Air pipe	mm	φ22.23	φ22.23	φ25.40	φ28.58			φ28.58			φ31.75
Weight		kg	220	225	230	285	290	298	345	370	375	450	455	460	465
Refrigerant	Name		R410A
Refrigerant	Self-contained filling capacity	kg	8	8	8	10	10	10	14	14	14	16	20	20	21
Running range	Cooling	°C DB	-5~56°C						-5~56°C
Running range	Heating	°C WB	-5~26°C						-5~26°C
*4 Maximum fuse wire current	MFA	A	20	25	32	40	40	50	63	63	63	80	80	80	80
*4 Minimum line current	MCA	A	17.6	21.7	28.4	35.2	40.2	48.1	51	54	55	66	68	70.1	72
Note: Modules can be assembled, the maximum assembled total refrigerating capacity is 64HP.
1. Nominal cooling capacity is determined according to the following conditions: Indoor temperature :27.0℃ DB/19.0℃ WB, outdoor temperature: 35.0℃ DB, equivalent pipe length: 10m, difference of height: 0m; 2. Nominal heating capacity is determined according to the following conditions: Indoor temperature: 20.0℃ DB, outdoor temperature 7.0℃ DB/6.0℃ , equivalent pipe length 10m, difference of height: 0m; 3. The noise level is tested before delivery. In the actual use, the measured noise may be different from the value specified in the table; in the quiet mode at night, noise is reduced by 5-8dB 4. Select fuses or circuit breakers according MFA, and select wiring specifications AIRTS is committed to delivering sustainable and customized HVAC solutions. With years of experience in manufacturing and global export, we support OEM/ODM services and offer complete technical guidance to our partners. Contact us now for a personalized quotation or to schedule a consultation for your HVAC project.

FAQs

Q1: What is the capacity range of the AIRTS AX Series outdoor units?

A1: The AIRTS AX Series offers modular capacities ranging from 8HP to 26HP per unit, and supports combinations up to 104HP to meet large-scale commercial cooling needs.

Q2: Can the AX Series be used in high-rise or multi-zone buildings?

A2: Yes, the AX Series is designed for flexible application across multi-zone environments, making it ideal for high-rise buildings, office towers, shopping malls, and hotels.

Q3: What type of compressor technology is used in the AX Series?

A3: The AX Series employs advanced DC inverter compressor technology, ensuring high energy efficiency, stable performance, and reduced power consumption.

Q4: Is the AX Series compatible with centralized control systems?

A4: Absolutely. The AX Series supports integration with building management systems (BMS) and centralized controllers, enabling easy operation, monitoring, and scheduling.

Q5: How does the AIRTS AX Series ensure energy efficiency?

A5: Through inverter-driven compressors, optimized refrigerant distribution, and intelligent load adjustment, the AX Series minimizes energy waste while maintaining superior comfort.

Q6: What installation flexibility does the outdoor unit offer?

A6: The vertical discharge and compact design allow for rooftop or ground installations in narrow or constrained spaces, providing excellent layout flexibility for engineers and installers.

Q7: Does the system offer low noise operation?

A7: Yes. The AX Series outdoor units are built with noise-reducing fan blades and vibration-dampening components to ensure quiet operation, which is ideal for noise-sensitive environments such as hotels or schools.

Q8: How can I get technical support or detailed specifications?

A8: You can contact our sales and technical team directly through our Contact Us page. We provide datasheets, installation manuals, and one-on-one consultation for your project requirements.

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High and large space air conditioner catalogue

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Outdoor Module Frequency Unit AirTS-AX series

The multi-unit system has some key features: