Atlas Equipment Solutions
Air-Cooled Oil-Free Magnetic Bearing Chiller
Air-Cooled Oil-Free Magnetic Bearing Chiller
Pricing: Available upon request
Lead time: Confirmed at time of quote
Customization: Supported
Request a QuoteResponse within 24 hours
Air-Cooled Oil-Free Magnetic Bearing Chiller
The Air-Cooled Oil-Free Magnetic Bearing Chiller is a high-efficiency chilled-water system designed for demanding industrial process cooling and commercial HVAC applications. It delivers stable cooling performance across a wide operating range while reducing mechanical friction, oil-related maintenance, and energy consumption.
The system uses two-stage, variable-speed centrifugal compressors with magnetic bearings. Because the compressor shaft is suspended magnetically and does not require lubricating oil, the unit eliminates conventional oil pumps, oil filters, oil heaters, and oil-management components. This helps improve heat-transfer efficiency, reduce maintenance requirements, and provide reliable part-load operation.
A flooded shell-and-tube evaporator, electronic expansion valve, economizer circuit, and variable-speed EC condenser fans work together to maintain efficient cooling under changing load and ambient conditions. The removable water heads and cleanable copper tubes simplify inspection and routine maintenance.
The integrated microprocessor controller provides precise chilled-water temperature control, compressor staging, operating-status monitoring, alarm history, and system protection. A responsive 7-inch touchscreen provides access to temperatures, pressures, compressor loading, operating hours, fan status, current draw, and expansion-valve position. Optional communication interfaces support integration with building and industrial automation systems.
Available in integral and modular configurations, the chiller can be configured with R134a, R513A, or ultra-low-GWP R1234ze refrigerant. Cooling capacities range from approximately 81 to 540 TR, depending on the selected model, refrigerant, and operating conditions. The product series is designed for applications including manufacturing, food and beverage processing, pharmaceuticals, chemical processing, data centers, electronics production, commercial buildings, and centralized chilled-water systems.
Available Models
| Configuration | Models |
|---|---|
| Integral | 090S, 130S, 160S, 180S, 220S, 250S, 310S, 360S |
| Modular | 340M, 380M, 410M, 440M, 510M |
Cooling Capacity
R134a / R513A Configurations
| Model | Cooling Capacity | Cooling Capacity |
|---|---|---|
| 090S | 87 TR | 306 kW |
| 130S | 122 TR | 429 kW |
| 160S | 160 TR | 563 kW |
| 180S | 178 TR | 626 kW |
| 220S | 220 TR | 774 kW |
| 250S | 245 TR | 862 kW |
| 310S | 310 TR | 1,090 kW |
| 360S | 356 TR | 1,252 kW |
| 340M | 333 TR | 1,171 kW |
| 380M | 364 TR | 1,280 kW |
| 410M | 410 TR | 1,442 kW |
| 440M | 432 TR | 1,519 kW |
| 510M | 501 TR | 1,762 kW |
R1234ze Configurations
| Model | Cooling Capacity | Cooling Capacity |
|---|---|---|
| 090S | 81 TR | 285 kW |
| 130S | 130 TR | 457 kW |
| 160S | 160 TR | 563 kW |
| 180S | 177 TR | 623 kW |
| 220S | 217 TR | 763 kW |
| 250S | 260 TR | 914 kW |
| 310S | 315 TR | 1,108 kW |
| 360S | 375 TR | 1,319 kW |
| 340M | 330 TR | 1,161 kW |
| 380M | 395 TR | 1,389 kW |
| 410M | 415 TR | 1,459 kW |
| 440M | 440 TR | 1,547 kW |
| 510M | 540 TR | 1,899 kW |
Cooling capacities vary according to refrigerant, chilled-water temperatures, ambient temperature, elevation, fouling factor, and selected options. The published standard ratings are based on 54°F entering water, 44°F leaving water, and 95°F ambient conditions.
Operating Conditions
| Parameter | Specification |
|---|---|
| Standard Entering Chilled-Water Temperature | 54°F / 12.2°C |
| Standard Leaving Chilled-Water Temperature | 44°F / 6.7°C |
| Standard Ambient Temperature | 95°F / 35°C |
| Low-Ambient Operation | Down to 0°F / -17.8°C with optional low-ambient package |
| High-Ambient Operation | Up to 125°F / 51.7°C with optional high-lift compressor |
| Refrigerants | R134a, R513A, R1234ze |
| Configuration | Integral or modular |
| Condenser Type | Finned-tube or microchannel |
| Electrical Supply | 380 V, 400 V, or 460 V |
| Phase | 3-phase |
| Frequency | 50 or 60 Hz |
Compressor System
| Parameter | Specification |
|---|---|
| Compressor Type | Oil-free magnetic bearing centrifugal compressor |
| Compression | Two-stage |
| Speed Control | Variable speed |
| Construction | Semi-hermetic |
| Lubrication | Oil-free |
| Starting Method | Soft start |
| Compressor Quantity | 1 to 4, depending on model |
| Refrigerant Circuits | Single or dual circuit, depending on model |
| Capacity Control | Variable-speed compressor staging and inlet guide vanes |
The magnetic bearing design prevents mechanical contact between the shaft and bearing surfaces during normal operation. This reduces friction, mechanical loss, vibration, and oil-related maintenance.
Evaporator
| Parameter | Specification |
|---|---|
| Type | Flooded shell-and-tube evaporator |
| Tube Material | Enhanced finned copper tubes |
| Water Heads | Removable |
| Water Connection | Victaulic grooved connection |
| Standard Insulation | 1-inch closed-cell insulation |
| Optional Insulation | 2-inch closed-cell insulation |
| Standard Refrigerant-Side Test Pressure | 220 psig |
| Standard Water-Side Test Pressure | 195 psig |
| Optional Water-Side Working Pressure | 250 psig |
| Optional Compliance | ASME evaporator available |
| Serviceability | Cleanable tubes and removable water heads |
The flooded evaporator maximizes the available heat-transfer surface and supports efficient operation at lower suction superheat. Removable water heads allow tube inspection and cleaning without removing the chilled-water piping.
Condenser System
| Parameter | Specification |
|---|---|
| Condenser Arrangement | V-coil configuration |
| Fan Type | Axial |
| Fan Motor | Variable-speed EC motor |
| Standard Coil | Finned copper tube with aluminum fins |
| Optional Coil | All-aluminum microchannel |
| Coil Test Pressure | 450 psig |
| Corrosion Protection | TCP coating, E-coating, copper fins, or coated fins |
| Coil Guard | Optional |
| Fan Control | Variable airflow and staged operation |
The EC condenser fans automatically regulate airflow to improve part-load efficiency, reduce operating noise, and support operation at lower ambient temperatures.
Refrigeration System
| Parameter | Specification |
|---|---|
| Expansion Device | Electronic expansion valve |
| Evaporator Feed | Precise liquid-refrigerant control |
| Economizer | Plate heat exchanger with electronic expansion valve |
| Refrigeration Cycle | Economizer and vapor-injection cycle |
| Compressor Cooling | Refrigerant liquid injection |
| Refrigerants | R134a, R513A, R1234ze |
The economizer subcools the main refrigerant flow before it enters the evaporator. Vapor injection increases cooling capacity with a relatively small increase in compressor power input, improving overall system efficiency.
Control System
| Feature | Specification |
|---|---|
| Controller | Advanced microprocessor controller |
| Display | 7-inch responsive touchscreen |
| Memory | Flash memory |
| Alarm History | Up to 10,000 event records |
| Temperature Control | Leaving chilled-water temperature control |
| Compressor Control | Programmable loading and staging |
| Start/Stop | Local, remote, or BAS-controlled |
| Setpoint Adjustment | Local display, BAS, or 4–20 mA input |
| Demand Limiting | Optional 4–20 mA input |
| Remote Monitoring | Optional |
| Chiller Sequencing | Optional master-slave control |
Displayed Operating Information
- Entering and leaving chilled-water temperatures
- Rate of chilled-water temperature change
- Compressor suction and discharge pressures
- Compressor suction and discharge temperatures
- Suction and discharge superheat
- Ambient temperature
- Compressor current
- Compressor loading percentage
- Compressor operating hours
- Number of compressor starts
- Electronic expansion-valve opening
- Condenser fan status
- Water-flow switch status
- Remote start and stop status
Communication
| Interface | Availability |
|---|---|
| Modbus RTU RS485 | Optional |
| Modbus TCP/IP | Optional |
| BACnet/IP | Optional |
| BACnet MS/TP | Optional |
| LONworks | Optional |
| 4–20 mA Chilled-Water Reset | Optional |
| 4–20 mA Demand Limiting | Optional |
| Chiller Plant Management | Optional |
The communication system allows the chiller to integrate with building-management systems, industrial controls, pumps, variable-frequency drives, motorized valves, flow meters, BTU meters, and other plant equipment.
Safety Protection
- Low evaporator-pressure protection
- High condenser-pressure protection
- Evaporator freeze protection
- Compressor operating-error protection
- Power-loss protection
- Chilled-water flow-loss protection
- Temperature and pressure sensor-error protection
- Compressor overcurrent protection
- High motor-temperature protection
- Under-voltage protection
- Over-voltage protection
- Phase-loss protection
- Phase-reversal protection
- Phase-imbalance protection
- Main disconnect switch
- Compressor and fan circuit breakers
- Pressure-relief valves
Optional Configurations
- Free-cooling coils
- Adiabatic cooling system
- Combined free cooling and adiabatic cooling
- High-ambient compressor package
- Low-ambient operation package
- Compressor suction and discharge isolation valves
- Dual pressure-relief valves
- TCP-coated microchannel condenser
- E-coated microchannel condenser
- Copper-fin condenser
- Coated-fin condenser
- Double-thickness evaporator insulation
- Evaporator anti-freeze heater and circulation pump
- 250-psig evaporator
- ASME-compliant evaporator
- Condenser coil guards
- Thermal-dispersion flow switch
- Power meter
- Ground-fault protection
- IP55 control panel
- EMI filter
- Active harmonic filter
- UPS rapid-restart package
- High-static condenser fans
- Rubber vibration isolators
- Spring vibration isolators
- Master-slave chiller sequencing
- Chiller plant-management system
- Extended compressor warranty
Applications
The Air-Cooled Oil-Free Magnetic Bearing Chiller is suitable for:
- Industrial process cooling
- Food and beverage processing
- Pharmaceutical manufacturing
- Chemical processing
- Plastics manufacturing
- Electronics and semiconductor production
- Data centers
- Commercial buildings
- Hospitals
- Hotels
- Central chilled-water plants
- District cooling
- Manufacturing facilities
- Research and pilot-production facilities
Product Selection
The correct model must be selected according to the required cooling capacity and actual project conditions. Please provide the following information when requesting a quotation:
- Required cooling capacity
- Entering chilled-water temperature
- Leaving chilled-water temperature
- Required chilled-water flow rate
- Maximum outdoor ambient temperature
- Minimum outdoor ambient temperature
- Project location and elevation
- Electrical voltage and frequency
- Preferred refrigerant
- Process-cooling or comfort-cooling application
- Required condenser type
- Corrosion-protection requirements
- Free-cooling or adiabatic-cooling requirements
- Required communication protocol
- Installation and startup requirements
Final dimensions, power consumption, water flow, pressure drop, operating weight, sound level, and performance will depend on the selected model and project operating conditions.
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