Withair® Air-cooled Screw Chiller adopts twin-screw compressor designed with the most advanced, industrial third-generation asymmetric technology of 5 gear teeth to 6 gear teeth.It has a variable capacity, and is high-efficiency and energy-saving. It has the humanistic microcomputer control system with remote control function. The self-protection features ensure the safe and reliable running. The unit series is complete and can be tailored to meet various needs of customers. The Air-cooled Screw Chiller features of compact size, low noise high energy-efficiency ratio and long service life, and is easy to operate and maintain. Thus they find a wide utilization in a great variety of locations, such as hotels, restaurants, office buildings, stores and hospitals. And they are also applicable to the air conditioning sites in metallurgical, chemical, mechanical, and electronic industries.Withair® Air-cooled Screw Chiller can be applied to civil construction of air conditioning projects and industrial projects, such as hotel, shopping mall,restaurant, hospital, factory, etc. It is a wise choice for areas where water is insufficient or there are strict limits on noise level and surroundings.

—— The Key Advantages Include ——

● Air-to-liquid, free-cooling coils

● Intelligent controls optimize energy

● Variable Speed Drive Power/Control Panel

● Advanced semi-hermetic twin screw compressors

● Dedicated inverter for each compressor

● Integrated compressor VSD standard with 50% fewer moving parts

● Easy access to display and control features via control display access door

● Powder-painted steel cabinet with gasket-sealed outer doors

● Excellent capacity control, high power factor and soft start

● ECO friendly refrigerant R134a,R407C.

● Built-in hydraulic module for option.

● Intelligent defrost totally.

● Multi self-protection  functions, such as: high & low pressure, high temperature, water flow and antifreeze protection.

● Modular networking technology, the operation of individual modules can be coordinated according demand.

● Advanced & world-famous hermetic scroll compressor high-efficiency, low-noise and low-vibration operation.

● Standalone subsystems enable maintenance of individual subsystems without affecting the continued operation of the rest.

● Hydrophilic and corrosion-resistant material ensures adaptability to poor weather. 
● Uses advanced hermetic scroll compressor high-efficiency, low-noise, and low-vibration operation.
● Remote monitoring and control features enable the unit’s operational schedule to be set via internet or phone.
● Using modular networking technology, the operation of individual modules can be coordinated according demand.
● Standalone subsystems enable maintenance of individual subsystems without affecting the continued operation of the rest.
● Unique heat exchanger protection technology, increases heat exchange efficiency to 30% above that of conventional heat exchangers.

—— The Benefits ——

● Lower total cost of ownership - Low maintenance, energy and repair costs drive down your total cost of ownership

● High efficiency - Hybrid mode combines the best technologies to boost part-load efficiency

● Quiet operation - Signification sound reduction at off-design conditions makes Withair'chillers than competitive chillers

● Lower first costs - Low mechanical- installation, electrical installation and equipment costs save money.

● Simple to own and operate - Advanced technologies, including a variable speed drive compressor, energy optimized hybrid cooling mode and air-to-liquid free cooling coils designed by our heat transfer experts, are intelligently controlled to maximize efficiency year-round. 

—— Product Features ——

The Withair® free-cooling screw chiller minimizes operating cost by combining superior engineering and technology with a packaged design that's simple to own and operate.

Withair new Generation air-cooled screw chillers are designed to meet current and future requirements in terms of reliability, energy efficiency and intelligent control. We adopt Environment friendly refrigerants R134a; as for reliability, DX evaporator,which is no oil return problem, we have done 100% run test before the units leave the factory. we adopt Touchable screen display and PLC control s,which are user-friendly operation interface. Twin-rotor screw compressors, more energy efficiency and reliability; Low operating noise Benefit From Low-noise ,low -vibration fans and double-wall structure Hanbell compressor.

We adopt Famous brand Danfoss electronic expansion valve, which is controlled by drive module controller.The drive module controller controls the valve open degree according to evaporator suction superheat temperature;which is Real PID modulation. 

The PLC controller reserved RS485 port which can be communicate with BAS (Building Automation system) though the. Modbus communication protocol，as we know our units can be combined by max 12 units to one goup，we need to set the master unit and the slave units on the PLC and then only master unit connect to the Host computer.

—— Strong cooperation and creating good quality ——

—— Circuit Diagram ——

—— System Installation Diagram (Industrial Refrigeration Solutions) ——

—— System Installation Diagram (Central Air Conditioning Solutions) ——

—— Water Piping ——

—— Installation Foundation ——

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Screw Compressor Water Chiller      +      Fan Coil Unit           +      Insulation pipe          +         Thermostat

                                                                                                                                                                                                          

Model			W02C1-200S	W02C1-300	W02C1-520	W02C1-720	W02C1-900	W02C1-1080	W02C1-1300	W02C1-1516
Nominal cooling capacity		kW	200	300	520	720	900	1,080	1,300	1,516
		USRT	56.9	85.3	147.9	204.7	255.9	307.1	369.6	431.0
Power supply			380V/3P/50Hz (400V/415V/3P/50Hz, 380V/460V/3P/60Hz as option)
Compressor	Type		Advanced semi-hermetic screw compressor
	Brand		Hanbell, RefComp, Danfoss
	Starting mode		Y- Δ
	Control type		Electrical expansion valve
	Input power	kW	61.1	86.7	150	210	260	316	378	421
Refrigerant	Type		HFC- R134a or R407C
	Circuit quantity		1	1	2	2	2	4	4	4
Control type			PLC program
Safe protection device			High/low pressure switch,overload protection,counter clockWise and short phase protection (power phases sequence protection),lack water(water-flow switch),anti-freeze protection,ect
Energy control			0-25%-50%-75%-100%, stepless adjustment as option
Air side heat exchanger	Type		High efficiency exchanger copper tube and aluminum fin coil
	Fans quantity		4	6	8	12	18	18	24	32
	Air volume	m³/h	10,800	17,600	22,000	35,200	35,200	46,000	46,000	58,900
	Motor input power	kW	1.56	1.56	2.23	2.23	1.56	2.23	2.1	1.56
Water side     heat exchanger	Type		High efficiency shell and tube
	Water flow	m³/h	34	51	89	123	154	185	223	247
	Water resistance	kPa	48	55	44	52	44	48	44	80
	Pipe size	In	4"					6"
Dimension	Length	mm	2,300	3,300	5,400	7,200	9,900	10,800	13,400	18,413.2
	Width	mm	2,140	2,140	2,140	2,140	2,140	2,140	2,140	2,065
	Height	mm	2,500	2,500	2,500	2,500	2,500	2,500	2,500	2,196
Noise level		dB(A)	73	75	75	79	78	79	78	79
Weight	Net	kg	2,750	3,750	6,200	8,600	11,250	12,900	16,000	18,600
	Gross	kg	3,000	4,050	6,700	9,500	12,150	14,250	17,400	22,700

1.    Standard cooling work condition: entering chilled water temperature 12℃, leaving temperature 7℃;dry bulb temperature 35℃,wet bulb temperature 24℃;
2.    PLC control system and touch-screen user interface simplifies operation.
3.    All models, sizes, dimensions, and specifications are subject to change without prior notice, please refer to nameplates for the most accurate specifications

- 

● 100% test before deliverying products.

● Tracking number will be sent to customer as soon as we ship the products.

● Item shipped in 25 working days against payment depends on the quantity.

● Four steps of pakacges, plastic film, foam, carton and plywood for stable transporation.

Withair® provides two styles package for different transporation modes:

(1). Standard package(free of charge): Unit is wrapped with plastic film, which is suitable for container shipment & a few transshipment cargo;
       
(2). Special package(extra charge): unit is wrapped with plastic film and wooded box, which is suitable for bulk cargo transporation;