—— Free Cooling Operations ——
35℃ ambient temperature - Highest energy consumption (100% electricity)
Chilled water produced by fully modulating compressors only
In Middle season (Spring and Autumn)
10℃ ambient temperature - Reduced energy consumption (as low as 50% electricity)
Production of chilled water by combination of free cooling system and fully modulating compressors
Based on ambient temperature the fas can modulate up to a max speed to obtain the max free cooling
-2℃ ambient temperature - Minimum energy consumption
Production of chilled water by combination of free without compressors energy (as low as 10% electricity)
Version Glycol-free (option)
Utilising intermediate plate heat exchanger a separated enclosed glycol circuit cools the primary system
—— Product Description ——
Withair® Free Cooling Scroll Chiller is a very intelligent chiller system with flexible capacity output. It could adjust cooling capacity output automatically according to requirements. It is much more energy-saving with a long lifespan.
Withair® Free Cooling Scroll Chiller is a kind of central air conditioner which adopts air as the cooling source and water as cooling medium. With rich experience in R&D, design and application, Withair® constantly lanuched new environment-friendly modular units, which improves the structures, systems and programs based on original products, and designs special series of comfortable and technological units. The environment-friendly modular unit has complete functions and various specifications, with basic modules of any combination available for different models. Withair® offer quiet, reliable, energy efficient equipment. These units incorporate high quality compressors, state-of-the-art coil design, and innovative packaging. As a sort of integrated equipment, it needs no cooling tower, cooling water pump, boiler and corresponding auxiliary parts, which makes the system more simple, saves installation space, convenient maintenance and energy saving, thus it is very suitable for areas that are short of water. several modules can be formed in to a air-cooled heat pump module unit by connecting each module's inlet & outlet pipeline in parallel. with a system without cooling water, with simple pipelines, moderate cost, short construction period, allowing staged investment, the whole unit consists of 1~16 modules and the maximum capacity is 9,040kW.
Withair® Free Cooling Scroll Chiller can be widely applied to civilian projects and industrial projects, such as hotel, villa, 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. Each unit is verified for total unit performance before shipping to insure quality standards are inherent in every unit.
Unit adopts modular design, relatively independent modules units can be any combination and through microcomputer for centralized control, unit according to the change of load start-stop corresponding number of module unit to adjust the supply of cold (heat) capacity, to achieve the goal of high efficiency and energy saving. Units can effectively under the climatic conditions of heating at -20℃ and heat unit during normal operation the system is 3 times more than ordinary electric heater, winter climate is relatively low and no boiler or other heating conditions particularly applicable areas. with FCU, VAV and AHU and fresh air units, semi-central air conditioning system has the flexible layout, beautiful shape, saving space, convenient adjustment, low running noise, etc.
R410A YEAR-ROUND COOLING MODULAR UNIT
Withair's new generation of year-round cooling modular unit is applicable for industrial applications, and requirements on energy saving and environment protection. It can operate for refrigerant at the ambient temperature of -10℃~48℃ all the year round, with environment friendly refrigerant R410A, advanced electronic expansion valve control technology, efficient shell and tube heat exchanger, EC fan with steplless speed regulation, fully meeting the requirements of various industry applications for chilled water throughout the year.
—— Widely Operation Range of Cooling ——
The modular water chiller unit is specially designed and can run in all weathers at the ambient temperature of -10℃~48℃.
—— EC Fan With Stepless Speed Regulation ——
The condensate fan employs the EC motor of which the speed is variable between 20%~100% to ensure that condensing pressure is within the range of safe operation under all conditions for longer service life.
R410A CLASSICAL MODULAR UNIT
The new generation environment-friendly modular air-cooled unit is based on years of experience in R&D and design, which is greatly improved in aspects of the structure, system and microcomputer control technology, providing wider operation range of refrigeration and heating, and higher adaptability to applications with requirements on comfort and technology. There are basic modules of any combination available for different models, and at most 16 modules can be connected in parallel.
—— Excellent Capacity ——
Units of the same model or different models can be combined freely. Each group can combine up to 16 modules.
—— Intelligent Defrosting Technology, Non-stop When Defrosting ——
The unit control system can determine whether defrosting is necessary according to the ambient temperature in heating mode, evaporating temperature and running time; when defrosting conditions are met, the unit will automatically activate the defrosting program to complete defrosting within a short time and provide heating operation efficiency up to over 90% , ensuring the optimum heating capacity and high COP.
—— Free Master Module Design ——
Any single unit can operate as the master once connected with the wired controller. It overcomes the problem that the whole system would fail to work properly when the fixed master unit malfunctions.
—— Intelligent Air Volume Management ——
The shared duct system is adopted to greatly expand the operating range. The single-module unit can automatically increase or reduce fans based on the ambient temperature to achieve optimal matching between air volume and load and deliver outstanding performance.
—— Intelligent Energy Management Technology ——
The Unique intelligent energy regulation technology in multi-module combination ensures that each module loads or unloads a refrigerant circuit before loading or unloading other refrigerant circuits in the single module, thereby providing higher efficiency, stability and IPLV.
—— Widely Operation Range ——
Low temperature cooling: 5°C ~ 48°C
High temperature heating: -15°C ~ 48°C
—— Compact Design And Smaller Footprint ——
Unique and compact structure results in small size and occupied area, significant reductions in installation space and cost; the unit is compact and easy to install. A 136kW unit covers floor space of only 2.4m2, a 50% reduction compared to its equivalents.
—— Reliable Hermetic Scroll Compressor ——
Unit adopt reliable hermetic scroll compressor, which is high efficient, energy saving and operates stably, with low noise, slight vibration and long service life.
—— V-Shaped Condenser ——
The V-shaped condenser has used condenser has used an integral reinforcing metal frame, internal thread and tripe anti-frosting features (patented design of open-window hydrophilic aluminum foil + bottom elevated + one-way valve), providing higher structural stability and corrosion resistance; with heat exchange efficiency improved through full use of heat exchange area, low tendency to dust accumulation and frosting in winter, low loss of pressure, smoother drainage and higher reliability.
—— Efficient Shell And Tube Heat Exchanger ——
The waterside efficient shell and internal thread heat exchanger is of helical baffle type, with better heat transfer performance and higher resistance to freezing than plate heat exchanger, lower water resistance and lower requirements for water quality.
—— Saw-shaped Condenser Fan Blades ——
Compared to plastic impellers, the saw-shaped condenser fan blade provide large air volume, high durability and high air supply efficiency with low noise.
—— High Precision Electronic Expansion Valve ——
The electronic expansion valve achieves 480 regulating range, supplemented by Withair's patented precision throttle control technology to realize dynamic matching in refrigerating system, fully improve the optimum efficiency of each component and ensure the optimum condition of system operation pressure and temperature.
—— New R410A Environment-friendly Refrigerant ——
R410A environment-friendly refrigerant does not contain chlorine which destroys the ozone layer, and the ozone layer destruction system (ODP) is zero. At the same time, it effectively reduces CO2 emission, has stronger anti-low temperature ability and higher cooling efficiency.
—— In House Engineered Microprocessor Control ——
The Withair control panel is fully upgraded based on origin control panels with years of experience in R&D and design, which combines more functions including phase sequence detection, current detection, RS-485 communication interface, delivering stronger performance, utility, standardization, convenience and universality. The USB interface is so provided to facilitate later-stage maintenance and upgrade of control function. The panel is supplemented by Withair developed control program which offers full operation control and multiple safety protection functions.
—— Multiple Protection Functions, Providing Safety And Reliable ——
The unit has multiple safety protection functions which ensure safety and stable operation of the unit and systems.
The water flow switch and multiple anti-freezing program designs protect the unit and systems in an all-round way.
—— Super Protection Function To Ensure The Safety Of System Operation ——
The unit is equipped with a fully functional protection module, with the industry‘s most complete 13 kinds of safety protection
functions and powerful fault diagnosis function as follows:
Power phase loss, reverse phase protection;
Current overload protection;
Insufficient water flow protection;
Pump overload protection;
Water pump linkage protection;
Fan motor overload protection;
Compressor exhaust pressure is too high protection;
Compressor return air pressure is too low protection;
Compressor exhaust temperature is too high protection;
Compressor intelligent scroll temperature protection;
Cooling operation cooling water temperature is too low protection;
Overheating protection of cooling water temperature in heating operation;
—— New Touch-wire Controller, Easy To Control The System ——
A set of wire controller can meet up to 16 modules parallel at the same time to achieve centralized control, and users can know the operation and fault state of the unit through the wire controller in time.
—— Ultra-low Temperature And Wide Temperature Working Conditions Operation ——
The reliable operating range of Withair series module unit is -26℃~48℃, when ambient temperature at -26℃,
unit still can be strong heating, which can realize the stable operation under the wide temperature range of -26℃~48℃.
—— The Key Advantages Include ——
● ECO friendly refrigerant R410a, R407c.
● Flexible configurations with top or side piping and front or side control box.
● Large panels for accessibility to compressor and controls sections
● Plate type, coaxial tube-in-tube heat exchanger for high performance, reliability, and resistance to freezing.
● Multi-function: provide cooling only, cooling with hot water, partial heat recovery for domestic hot water heating (55℃).
● Unit choose efficient rotary or scroll compressor, the use of high efficient heat exchanger technology processing, condensation temperature greatly reduced.
● When multiple units were combined into a system, because each unit can be individually ON/OFF; wide range of system energy regulation and running costs fell by more 40%.
● Unique compressor anti-vibration technology (patent ZL 2020 2 0246589.1) and sound attenuation material ensure ultra-quiet performance.
● Advanced microcomputer automatic control system, with protection of high and low pressure, overload, low voltage, phase lack, and low temperature etc., with terminal for the external pumps, and displays and alarms malfunction.
● Running ambient range from -20℃ to 50℃.
● Built-in hydraulic module for option.
● Multi-system design and wear-and-tear management technology reduces electric impulse and extend service life.
● Modular network function: unit control system is equipped with the network communication, the user can control operating units quantity according to the actual use load, make user side water system utilities, to realize the automatic device management automation and energy management.
● Smart microchip control and large LCD user interface, capable of one-key startup.
● Automatic intelligent reset. Unit shall automatically restart 5 minutes after shutdown if the fault has cleared. Should a fault occur 3 times sequentially, then lockout will occur.
● Humanized design, widened application scope: the unit’s temperature settings for room, hot water, water intake/outlet, freeze protection, and compressor exhaust can be adjusted on-site according to environmental conditions.
● Communication adapter connection the unit to BMS(Building Management System) is an optional accessory, please get in touch with us or our distributor if required.
● Unit with multi-protection to guarantee the unit running stability and security, such as: high/low voltage, low oil level protection, exhaust temperature, antifreeze, power lack/reverse phase, water system cut off. operating condition with small change range stable operation, safe, reliable and long service life.
● Easy installation, simple water piping system configuration, you can make design partition and divide second installation.
● Quality components selection
Compressors and refrigeration accessories (such as dry filter, thermal expansion valve, liquid supply solenoid, liquid level mirror, high/low pressure control devices) all chosen world-renowned brand products to ensure that the unit reached an excellent level of performance. Using the most advanced DAE / DAC efficient heat transfer pipe, heat transfer surface with internal ribbed tube makes the heat transfer coefficient substantially increased; the heat exchanger unique structural design, the best way of copper tube layout and precision of refrigerant control technology, greatly improved the efficiency of heat transfer.
● Perfect control
1) Computerized control with standby manual operation system
2) Compressor Operation timing
3) Compressor automatic start-up sequence,
4) Alarm signals
5) Alarm reset
6) Water temperature control
7) Manual reset high pressure switch, Automatic reset low pressure switch
● Equipped self-diagnosis function, and automatically eliminate software problem
● Protections that ensure its safe and stable operation:
1) Reverse phase
2) Lack phase
3) High/low pressure
4) Gas discharge
5) Outlet water temperature too low (high)
6) Water stopped
8) Compressor overheat etc.
● All the components covered with casing, keeps damages to cooling and electrical system away.
● Small size, light weight, easy for installation, transfer and maintenance, can be put into use just make water pipes and the power supply cable be connected at the site.
● EVI compressor as option. EVI compressor-enhanced vapor injection, Vapor-injected method can effectively improve heat capacity, prevent higher discharge temperature of compressor and guarantee operating stability of unit at low temperature).
Panels and frame are made from galvanized steel protected with polyester powder painting to ensure total resistance
to atmospheric agents.
● HERMETIC SCROLL COMPRESSORS
Single phase type and 3-phase scroll type compressors, with built-in thermal overload cut-out and crankcase heater, mounted on rubber vibration dampers.
● EVAPORATOR & CONDENSER
High efficiency plate type heat exchanger, tube in tube heat exchanger, shell and tube heat exchanger, factory-insulated with flexible close cell material.
● REFRIGERANT CIRCUIT
Copper tube connection with charge valves, filter, thermostatic expansion valve, gas-liquid separator, high pressure switch and low pressure switch. The heat pump units are complete also with 4-way valve and one way valve.
● HYDRAULIC CIRCUIT
No build in water circuit as standard.
● ELECTRIC PANEL
Consists of: Compressor contactor, Compressor protection breaker, Microprocessor with function display.
● OPTIONAL PARTS
Source side water flow switch, source side water pump, & user side water flow switch, user side water pump, hot water pump
Metallic filter for the water circuit
Build in water circuit
Heat recovery for domestic hot water (55℃)
—— You May Like ——
—— Specifications (Year-round Cooling Modular Unit, Standard Single Unit) ——
Nominal cooling capacity
Wired control, manual or automatic start up, the running status display and malfunction alarm, etc.
380V/3P/50Hz (400V/415V/3P/50Hz, 230V/380V/460V/3P/60Hz as option)
Advanced fully hermetic scroll compressor
Daikin, Copeland, Hitachi, Panasonic, Mitsubishi as option
Safe protection device
High/low pressure switch, overload protection, counter clock wise and short phase protection
(power phases sequence protection),lack water(water-flow switch),anti-freezing protection, etc.
Air side heat exchanger
High efficiency exchanger copper tube and aluminum fin coil
Air flow volume
Fan motor type
Low noise, high efficiency, waterproof and weatherproof axial flow type
Fan motor power
Water side heat exchanger
High efficiency shell-and-tube heat exchanger
Water flow rate
Water pressure drop
40 ~ 80
Max. working pressure
Water proof level
Electric shock protection
Entering/leaving water pipe
Working range(cooling in year round)
- 10 ~ 48
Wired control, manual or automatic start up, the running status display and malfunction alarm, etc.
1. Nominal cooling operating conditions: entering chilled water temperature 12℃, leaving temperature 7℃; outdoor dry bulb temperature 35℃,wet bulb temperature 24℃.
2. The controllers need to ordered separately, including wire controller, communication line, IOM, temperature sensor and water flow switch.
3. These parameter were tested according to pure water, not include anti-freezing liquid and water pump power.
4. Chiller unit without heating parameters.
5. In actual use, the cooling/heating loss should be considered after the installation of the system piping, pumps, valve, dirt, etc. about 6%.
6. For other working conditions or capacity parameters, please contact Withair for cooling ambient condition under 5℃.
7. There will be no further notice if the parameters changes due to product optimization.
8. The units of the same model or different models can be combined freely. Each system can combine up to 16 modules.
9. Manufacturer reserves the right to make changes to above specifications without prior notice, please refer to the factory configuration when purchasing.
Nominal working condition
Nominal working condition
Dry bulb temperature (℃)
Dry bulb temperature of outdoor (℃)
5 ~ 15
2.5 ~ 8
12 ~ 50
Note: LWT - leaving water temperature, EWT - entering water temperature
—— Year-round Cooling Capacity Correction Factor Table in Different Conditions ——
Ambient temperature (℃)
Note: LWT - leaving water temperature, EWT - entering water temperature
Note: Above correction factors adapt to W01R1-72YRC, W01R1-105YRC, W01R1-140YRC
● Solution for Hotel : Heat Recovery Air-cooled Water Chiller + FCU + Floor Heating + Fresh Air Unit + Heat Pump Water Heater
In addition to reliably guaranteeing the use of air conditioners, this system can also guarantee 24/7 hot water supply; in the cooling season, users can get free hot water while using air conditioners for cooling; the cooling water system is omitted, and low the initial investment. ; Dual-purpose cooling and heating, no additional heating system is required; different air handling equipment can be configured according to the needs of different functions, such as fan coil units, variable air volume units, fresh air units, air handling units, etc.; modular configuration of the unit, it can realize non-stop maintenance; intelligent control, realizing quasi-linear energy adjustment with load changes, the system does not need a dedicated machine room, so it can release the effective space of the building and realize its economic value.
● Solution for Office Building: Air-cooled Water Chiller + Fan Coil Unit + Fresh Air Unit
In addition to the reliable protection of the air conditioner, the system eliminates the need for a cooling water system and has a small initial investment; it is dual-purpose for cooling and heating, without the need for additional heating systems; it can be equipped with different air handling equipment, such as fan disks, according to the needs of different functions Tubes, variable air volume units, fresh air units, combined air handlers; the modular configuration of the main engine can realize non-stop maintenance; intelligent control realizes quasi-linear energy adjustment with load changes, so that the system always maintains the highest operating efficiency. The annual operating costs are low. The system does not require a dedicated computer room, so it can release the effective space of the building and realize its economic value.
● Solution for Shopping Mall : Air-cooled Water Chiller + Air handling Unit + Fresh Air Unit + Variable Air Volume Unit
According to the characteristics of large flow of people and high demand for air volume in commercial places, the system adopts variable air volume units with large air volume and air handling unit and modular units configuration, which can realize non-stop maintenance; eliminates the need for cooling water system, and has a small initial investment; dual use of cooling and heating , No need to configure the heating system separately; in addition to ensuring the reliable operation of the system, intelligent control realizes quasi-linear energy adjustment with load changes. It can be easily switched to the mode of fresh air during the transition season, so that the system always maintains the highest operating efficiency. The annual operating costs are low. The system does not require a dedicated computer room, so it can release the effective space of the building and realize its economic value.
● Solution for Amusement Building : Air-cooled Water Chiller + FCU + AHU + Fresh Air Unit + Heat Pump Water Heater
In addition to reliably ensuring the use of air conditioners, the system can also guarantee 24 hours of hot water supply for 365 days; the cooling water system is omitted, and the initial investment is small; the heating and cooling systems are dual-purpose, without the need for additional heating systems; the modular units configuration can be realized. The system capacity can also be increased at any time according to the operating conditions if the maintenance is disabled; intelligent control realizes quasi-linear energy adjustment with load changes. The system does not require a dedicated computer room, so it can release the effective space of the building and realize its economic value.
Packaging & Transportation
● 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;