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30XA

Product catalog summary

Overview: The document provides comprehensive technical specifications and guidelines for Carrier Corporation's AquaForce® Fixed Speed Air-Cooled Liquid Chillers, specifically the 30XA series, ranging from 80 to 500 nominal tons. These chillers are designed for high efficiency and are suitable for various applications, including sound-sensitive environments.

Key Features:

Rotary Screw Compression: Utilizes R-134a HFC refrigerant, which is environmentally balanced and non-toxic.
Quiet Operation: Features a Quiet AeroAcoustic™ fan system, ideal for hospitals and schools.
Reliability: Built with multiple independent circuits for redundancy and electronic expansion valves for precise control.
Hydronic Pump Package: Optional integrated package includes pumps, strainer, flow regulator, and freeze protection.
Novation® Heat Exchanger: Microchannel coil technology reduces weight and refrigerant charge, offering robust corrosion resistance.

Installation and Controls:

Easy Installation: Single chassis design with industrial-quality base rail for structural integrity.
ComfortLink Controls: User-friendly interface available in multiple languages, offering features like temperature reset and demand limiting.
Communication Options: Compatible with Carrier Comfort Network® and BACnet for building automation systems.

Environmental Considerations: The use of R-134a refrigerant aligns with environmental protocols, ensuring no ozone layer damage.

Quality Assurance: The chillers are ISO 9001:2015 certified, ensuring high-quality manufacturing processes.

Additional Options: Various configurations are available for condenser coils, cooler options, hydronic pump packages, and electrical setups to meet specific application needs.

Specifications: The document outlines operational parameters, emphasizing that the entering water temperature (EWT) should not exceed 70°F (21.1°C) for extended operation, with pulldown possible from 95°F (35°C). The cooler delta-T must be between 3 and 20°F (1.7 and 11.1°C), and a mixing loop is required for larger or smaller delta-T applications.

Procedures: For operation below 32°F (0°C), low ambient temperature head pressure control and wind baffles are necessary. Loop freeze protection with glycol is recommended to a minimum of 15°F (8.3°C) below the lowest anticipated ambient temperature.

Standards and Recommendations: High ambient air temperature limits are set at 125.6°F (52°C) for most units, with specific units allowing up to 131°F (55°C). Chillers should not be oversized by more than 15% at design conditions.

Water Quality and Fouling Factor: Poor water quality can increase the required cooler fouling factor, leading to lower capacity and higher input kW. Better water quality results in lower fouling factors and improved performance.

Selection Procedure: The document provides a detailed procedure for selecting water pumps for 30XA chillers, emphasizing the importance of proper water system design to avoid issues like low water flow and excessive cycling of chiller compressors.

Performance Data: Charts and tables assist in the selection of pump impeller sizes and illustrate cooler pressure drop curves for various unit sizes.

Installation Notes:

The chiller must be installed level to ensure proper compressor oil return and hydraulic function.
Wiring and piping diagrams are general guides and not specific to any installation. Compliance with local and national codes is mandatory.
Standard piping techniques should be followed, with reference to Carrier System Design Manual or ASHRAE handbooks.

Electrical Specifications:

Units are suitable for electrical systems within specified voltage limits, with a maximum phase imbalance of 2% for voltage and 10% for amps.
Wiring must be rated for 75°C minimum and use copper conductors.

Critical Parameters:

Ensure all installations comply with applicable codes and standards.
Maintain proper installation conditions to avoid operational issues.
Use appropriate materials and techniques for wiring and piping to ensure system integrity and safety.

Temperature Control and Safety Features: The document outlines the control logic for managing the leaving-fluid temperature in chillers, including safety features like low-pressure and high-pressure cutouts, compressor anti-cycling, and loss of flow protection.

Control Sequence: The control sequence includes off-cycle management, start-up procedures, and capacity control.

Sensors and Pressure Transducers: Thermistors and pressure transducers are used for temperature and pressure sensing, respectively.

ComfortLink Controls: ComfortLink controls maintain chiller operation under extreme conditions, using features like maximum operating pressure (MOP) and lead/lag circuit management.

Temperature Reset Options: Temperature reset options adjust the leaving chilled water temperature (LCWT) based on return fluid, outdoor-air, or space temperature.

Accessory Controls and Demand Limit: Accessory controls allow for demand limit settings to manage power draw during peak demand.

Diagnostics and Default Settings: The microprocessor can undergo service tests to confirm functionality.

Ice Duty and Energy Management: Ice duty allows for reduced leaving fluid temperature operation for thermal storage, potentially reducing energy costs and chiller plant size.

Installation and Clearance Requirements: The document provides guidelines for chiller installation, emphasizing outdoor placement, proper clearances for airflow and service, and considerations for rooftop mounting to minimize noise and vibration.

ExpertFit™ Software Model: Carrier's ExpertFit™ Software Model is designed to predict air-cooled chiller performance in confined spaces, offering realistic performance reports.

Installation Requirements: Units should be aligned side by side with a minimum separation of 10 ft (3 m) and 6 ft (1.8 m) respectively.

Chiller Sizing and Operation: Avoid oversizing chillers by more than 15% at design conditions to prevent efficiency loss.

Flow and Temperature Control: The chillers are designed for a full load temperature rise of 3° to 20°F.

Fluid Loop Volume: The circulating volume must meet or exceed 3 gallons per ton for stability.

Freeze Protection: Freeze protection is standard on all 30XA chillers with flooded coolers.

Recommendations: Use only approved antifreeze solutions for heat exchanger duty.

Minimum and Maximum Cooler Flow Rates: The document outlines the operational parameters for cooler flow rates, specifying that applications requiring cooler leaving water temperatures below 40°F (4.4°C) need antifreeze.

High and Low Ambient Temperature Operation: Standard 30XA chillers can operate at ambient temperatures up to 125.6°F (52°C).

Altitude Correction Factors: The document provides correction factors for operation at altitudes above 2000 ft (609.6 m).

Multiple Chillers and Dual Chiller Control: The document discusses the installation of multiple chillers in parallel or series to meet higher capacity demands or provide redundancy.

Condenser Coil Protection: Various coil options are available to meet corrosion resistance requirements.

Optional Hydronic System Selection: The document details the selection of pump flow and pressure loss considerations for hydronic systems.

Hydronic Package and Air Separation: The hydronic package includes a combination valve for water isolation and recommends a pressure relief valve installation between the unit and valves.

Energy Management and Electrical Controls: Energy management practices like demand limiting and temperature reset can reduce costs.

Outdoor Air-Cooled Liquid Chiller Specifications: The chiller is microprocessor-controlled, air-cooled, and designed for outdoor installation with screw compressors and low sound fans.

Equipment and Construction: The chiller is factory-assembled with all necessary wiring, piping, and refrigerant charge.

Refrigeration Components and Controls: The refrigeration circuit includes a filter drier, sight glass, expansion valve, and service valves.

Operating Characteristics and Electrical Requirements: The unit operates in ambient temperatures from 32°F to 125.6°F and can start with 95°F entering fluid temperature.

Pump Specifications:

Pumps are vertical in-line, single-stage, serviceable without disturbing piping.
Materials include class 30 cast iron casing and cast bronze impeller.

Pressure/Temperature Taps and Valves:

Factory-installed taps for measuring pressure differentials across pumps and strainers.

Hydronic Assembly:

Includes electric freeze protection to -20°F and Schedule 40 black steel piping.

Variable Frequency Drive (VFD) Features:

Voltage vector control with pulse width modulation for power factor correction.

Special Features:

DX Cooler Option: Shell-and-tube type with direct expansion refrigerant circuits.

Additional Options:

Isolation Valve Option for compressor isolation during servicing.

Specifications and Options:

Electrical Receptacle: Units come with a 115-v female receptacle and a 4 amp GFI receptacle, not available for 380-v units.

Catalog excerpts

Product Data AquaForce® Fixed Speed Air-Cooled Liquid Chillers 80 to 500 Nominal Tons (265 to 1740 Nominal kW) 30XA080-501 Fixed Speed Air-Cooled Liquid Chillers with Optional Integrated Hydronic Pump Package

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Features/Benefits AquaForce® chillers were designed from the ground up to meet the efficiency demands of today and the future by providing premium air-cooled chiller packages for contractors, consulting engineers and building owners. • • • • Rotary screw compression R-134a HFC refrigerant Quiet AeroAcoustic™ fan system Novation® heat exchanger technology with microchannel coil • Easy to use ComfortLink controls • Optional integrated hydronic pump package, available with variable frequency drive (VFD) AquaForce chillers’ quiet operation make them ideal for sound sensitive applications Great performance...

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Seismic certification A seismic kit is available which will result in a unit SDS (seismic design acceleration parameter) level of 2.4. Novation® heat exchanger technology The Novation heat exchanger design with microchannel (MCHX) condenser coil is a robust, cost effective alternative to traditional coil design. These coils are offered coated or uncoated to match coil protection to site conditions. The ecoated version of this coil can withstand an 8000-hour salt spray test in accordance with ASTM (American Society for Testing and Materials) B-117 standard. The Carrier Electronic Catalog (E-CAT)...

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Model number nomenclature 30XA - AquaForce® Air-Cooled Chiller Design Series SEE NEXT PAGE FOR REMAINDER OF MODEL NUMBER NOMENCLATURE Condenser Coil/Ambient/Low Sound Options - - Aluminum Fin/Copper Tube, High Ambient Temperature 0 - Copper Fin/Copper Tube, High Ambient Temperature 1 - Aluminum Pre-Coat Fin/Copper Tube, High Ambient Temperature 2 - Aluminum E-Coat Fin/Copper Tube, High Ambient Temperature 3 - Copper E-Coat Fin/Copper Tube, High Ambient Temperature 4 - Novation® Heat Exchanger (MCHX), High Ambient Temperature 5 - MCHX E-Coat, High Ambient Temperature 6 - Aluminum Fin/Copper Tube,...

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SEE PREVIOUS PAGE FOR REMAINDER OF MODEL NUMBER NOMENCLATURE Refrigeration Circuit Options - – None 0 – Suction Line Insulation 1 – Isolation Valves 2 – Low Ambient Head Pressure Control 3 – Suction Line Insulation, Isolation Valves 4 – Suction Line Insulation, Low Ambient Head Pressure Control 5 – Isolation Valves, Low Ambient Head Pressure Control 6 – Suction Line Insulation, Isolation Valves, Head Pressure Control 7 – Minimum Load Control 8 – Suction Line Insulation, Minimum Load Control 9 – Isolation Valves, Minimum Load Control B – Low Ambient Head Pressure Control Operation, Minimum Load...

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EXV — Electronic Expansion Valve MCHX — Microchannel Heat Exchanger N/A — Not Applicable Operating weight includes 2 pumps on models 30XA090-162. No pumps are available on 30XA080, 30XA082, or 30XA180-501. All weights include coil trim panels. See pages 10-24 for mounting weights for units without pumps and units with single pump packages. t 30XA080,082 units do not have an economizer.

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EXV — Electronic Expansion Valve MCHX — MicroChannel Heat Exchanger N/A — Not Applicable Operating weight includes 2 pumps on models 30XA090-160. No pumps are available on 30XA080, 30XA082 or 30XA180-501. All weights include coil trim panels. See pages 10-24 for mounting weights for units without pumps and units with single pump packages. t 30XA080,082 units do not have an economizer.

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EXV — Electronic Expansion Valve MCHX — Microchannel Heat Exchanger N/A — Not Applicable Operating weight includes 2 pumps on models 30XA090-160. No pumps are available on 30XA080, 30XA082 or 30XA180-501. All weights include coil trim panels. See pages 10-24 for mounting weights for units without pumps and units with single pump packages. t 30XA080,082 units do not have an economizer.

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Physical data (cont) UNITS WITHOUT P

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UNIT MOUNTING WEIGHTS (cont) UNITS WITHOUT PUMPS AND WITH MCHX CONDENSER COILS COMPRESSOR SIDE 30XA090-122 COOLER SIDE B COMPRESSOR SIDE 30XA325-352 COOLER SIDE F E D C COMPRESSOR SIDE COMPRESSOR SIDE COMPRESSOR SIDE J K L M N O CONTROL PANEL SIDE COMPRESSOR SIDE COMPRESSOR SIDE LEGEND MCHX — MicroChannel Heat Exchanger NOTE: Size 501 ships as two modules. The 501A and 501B modules are installed as one chiller.

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UNIT MOUNTING WEIGHTS (cont)SINGLE PUMP UNITS WITH MCHX CONDENSER COILS — ENGLISH 30XA UNIT SIZE COMPRESSOR SIDE COMPRESSOR SIDE LEGEND MCHX — MicroChannel Heat Exchanger

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UNIT MOUNTING WEIGHTS (cont)DUAL PUMP UNITS WITH MCHX CONDENSER COILS — ENGLISH 30XA UNIT SIZE DUAL PUMP UNITS WITH MCHX CONDENSER COILS — SI 30XA UNIT SIZE COMPRESSOR SIDE COMPRESSOR SIDE MCHX — MicroChannel Heat Exchanger

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Physical data (cont)UNIT MOUNTING WEIGHTS (cont)UNITS WITHOUT PUMPS AND WITH Al/Cu CONDENSER COILS — SI 30XA UNIT SIZE ‘Condenser Coil: Aluminum Fins/Copper Tubing.NOTE: Size 501 ships as two modules. The 501A and 501B modules are installed as one chiller.

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UNITS WITHOUT PUMPS AND WITH Al/Cu CONDENSER COILS COMPRESSOR SIDE COMPRESSOR SIDE COMPRESSOR SIDE J K L M N CONTROL PANEL SIDE COOLER SIDE COMPRESSOR SIDE COMPRESSOR SIDE NOTE: Size 501 ships as two modules. The 501A and 501B modules are installed as one chiller.

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*Condenser Coil: Aluminum Fins/Copper Tubing. COMPRESSOR SIDE COMPRESSOR SIDE

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UNIT MOUNTING WEIGHTS (cont)DUAL PUMP UNITS WITH Al/Cu CONDENSER COILS — ENGLISH 30XA UNIT SIZE *Condenser Coil: Aluminum Fins/Copper Tubing. COMPRESSOR SIDE COMPRESSOR SIDE

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