Integrated Water-Cooled Chiller | Compact Central HVAC Cooling Unit - FAQ

Yes. Aurashu’s Integrated Low-Temperature Heating Modular Units can be widely customized to meet diverse application needs in residential, commercial, and industrial heating, cooling, and domestic hot-water systems. Because projects vary greatly in climate, load characteristics, installation conditions, energy strategies, and control requirements, Aurashu offers multi-dimensional engineering-level customization options. These custom configurations ensure maximum performance, higher efficiency, longer service life, and smoother integration with existing building systems.1. Capacity & Modular Configuration CustomizationAurashu supports flexible capacity expansion using a highly scalable modular architecture. Units can be customized in:Single-module capacity sizingMulti-module parallel configurationN+1 or N+N redundancy designLoad-based module sequencing logicThis ensures precise matching of project heat-load curves, avoids oversizing or undersizing, and supports future expansion without redesigning the entire system.2. Compressor Type & Performance CustomizationDifferent project requirements—especially extremely cold regions, variable load operation, or energy-saving goals—require different compressor technologies. Aurashu provides options such as:Inverter scroll compressorsEVI low-temperature scroll compressorsHigh-efficiency fixed-speed modulesHybrid module combinations (EVI + inverter)These options enable improved part-load efficiency, wider operating temperature range, and lower energy consumption under variable conditions.3. Heat Exchanger CustomizationAurashu offers tailored heat exchanger configurations depending on water quality, application scenes, and thermal performance requirements. Customization includes:Tube material selection (copper, enhanced copper, stainless steel)Anti-corrosion coatingsEnlarged heat-exchange surface areaLow-temperature heat-transfer optimizationThis ensures stable and reliable output both in severe cold and in high-humidity environments.4. Control System & Communication Protocol CustomizationTo integrate with complex building or industrial systems, Aurashu supports:Custom BMS/EMS communication protocols (Modbus, BACnet, KNX, etc.)Optimized multi-module algorithm logicLoad prediction & adaptive controlCustom user dashboards, alarms, and monitoring parametersAdvanced control customization greatly enhances system stability, energy savings, and intelligent fault prevention.5. Operating Temperature Range CustomizationFor regions with harsher conditions (e.g., −35°C or lower), Aurashu can adjust:Refrigerant typeCompressor configurationHeat exchanger sizeFrosting/defrosting logicThese ensure the system maintains reliable heating output even under severe winter climates or high-altitude low-pressure environments.6. Hydronic System CustomizationAurashu supports customization of water-side components according to project design:Built-in vs. external water pumpsSingle pump / dual pump configurationsHigh-head pump customization for tall buildingsDifferent flow rates & water pipe interface sizesThis ensures compatibility with central heating loops, floor heating, fan coil networks, and industrial process systems.7. Structural & Installation CustomizationDifferent projects require special installation conditions or special structural forms. Aurashu supports:Compact frame customizationSide discharge / top discharge configurationsAnti-corrosion housing for coastal regionsLow-noise or ultra-low-noise customizationVibration isolation and seismic reinforcement optionsThese provide greater flexibility in tight mechanical rooms, rooftops, or noise-sensitive environments.8. Hot Water & Energy Strategy CustomizationAurashu can configure units for:Heating + Cooling + Domestic Hot Water (tri-supply)Hot water priority modeHigh-temperature hot-water output (up to 60–65°C)Energy-optimized seasonal operating modesSolar-assisted or hybrid energy integrationThis ensures best energy utilization and operational efficiency across different applications.9. Water Quality & Filtration CustomizationBecause water quality significantly affects system life and efficiency, Aurashu supports special customization such as:Enhanced corrosion-resistant heat exchangersHigh-filtration water strainersWater softening/pre-treatment compatibilityCustom alarms for water-quality monitoringThese maximize long-term reliability and reduce maintenance costs.10. Full Engineering Customization PackagesAurashu provides complete engineering-level customization for large commercial and industrial projects, including:System design optimizationPiping layout adaptationCommissioning customizationDocumentation, export standards, and certificationsThese ensure seamless integration and smooth operation throughout the entire lifecycle.

Water quality is a critical factor influencing the performance, efficiency, reliability, and service life of Aurashu’s Integrated Low-Temperature Heating Modular Units. Because these systems rely on stable heat exchange between the refrigerant circuit and the water-side loop (for heating, cooling, or domestic hot water), maintaining proper water quality ensures consistent operation, reduced maintenance, and long-term durability. Poor water conditions—including scaling, corrosion, sediment buildup, and microbiological growth—can significantly impair the unit’s thermal performance and increase energy consumption.1. Importance of Water Quality in Aurashu Modular UnitsAurashu’s modular units use high-performance plate heat exchangers or brazed plate exchangers with narrow channels. While these designs maximize heat transfer efficiency, they are sensitive to water contaminants. Even a small amount of scale or rust can reduce heat transfer, lower system efficiency, increase operating pressure, and cause compressor overload.Maintaining correct water quality ensures:Higher heat transfer efficiencyStable outlet temperatures and reliable comfort performanceReduced compressor and pump energy consumptionExtended equipment lifespan (10–15+ years)Lower maintenance frequency and downtime2. Key Water Quality Requirements(1) Hardness & Scaling ControlHard water causes mineral deposition (primarily calcium and magnesium) inside heat exchangers—one of the biggest causes of capacity loss.Aurashu recommends:Total hardness ≤ 100 mg/LUse softened water or anti-scaling treatmentPeriodic descaling for high-hardness regionsScaling of even 1 mm can reduce heat transfer by 10–15%, significantly raising operating costs.(2) Corrosion PreventionCorrosion causes metal deterioration, leaks, and exchanger damage.To minimize corrosion:Maintain pH between 7.0 and 9.0 (depending on system materials)Control chloride and sulfate ions within standardsAdd corrosion inhibitors when neededUse stainless-steel-friendly water treatment for plate heat exchangersStainless steel, copper, and brazed plates require balanced chemistry to avoid pitting corrosion.(3) Suspended Solids & Sediment ControlSediment, rust particles, and sand can block heat exchanger channels.Aurashu recommends:Suspended solids ≤ 20 mg/LInstall Y-strainers or mesh filters on the return lineUse automatic or magnetic filters for industrial loopsRegular flushing is recommended for older building pipelines.(4) Microbiological ControlBacteria, algae, and slime lead to biological fouling, which reduces heat transfer and may cause odor or corrosion.Use biocides if microbiological contamination is detectedEnsure circulation loops are closed to minimize biological growth(5) Anti-freezing Protection (Cold-Climate Operation)In extremely low outdoor temperatures, some systems require antifreeze (glycol mixture) to avoid freezing inside the water loop.Aurashu recommends:Ethylene glycol or propylene glycol solutions (10–35%)Avoid excessive glycol concentration to prevent viscosity-related performance loss3. Recommended Water Treatment SystemTo ensure long-term system stability, Aurashu advises using:Softening or anti-scaling devices (for hard water areas)Closed-loop water treatment with corrosion/scale inhibitorsMulti-stage filtration (mesh filter + Y-filter + magnetic dirt separator)Automatic dosing system (for inhibitors or biocides)Periodic water-quality testing (every 6–12 months)4. Consequences of Poor Water QualityIgnoring water quality requirements may lead to:Reduced heating/cooling capacityHigher energy costs (5–25% increase)Compressor overload alarmsHeat exchanger blockageCorrosion and leakageShortened equipment lifeIn severe cases, exchanger replacement may be required—expensive and avoidable.5. Aurashu’s SupportAurashu provides:Pre-installation water quality evaluationTailored water treatment recommendationsLong-term maintenance plansSmart monitoring options for large systemsBy ensuring proper water quality, users can maximize the efficiency and reliability of Aurashu’s integrated modular heating units.

Aurashu’s Integrated Low-Temperature Heating Modular Unit offers significant installation advantages compared with traditional centralized heating systems, making it ideal for both new projects and renovation applications. The modular architecture, compact footprint, and standardized connection interfaces allow rapid on-site deployment with minimal disruption.First, the modular design enables flexible capacity planning. Each module operates independently, and multiple modules can be combined to achieve the required heating, cooling, or domestic hot-water capacity. This eliminates the need for oversized equipment and supports step-by-step expansion as project demand grows. It also simplifies logistics—small modules are easier to transport, lift, and position even in restricted spaces.Second, the system features a compact layout and integrated components, including compressors, heat exchangers, controls, and essential safety devices. This reduces the need for additional external pipelines, electrical cabinets, or auxiliary equipment. Installation teams only need to connect the water system, power supply, and communication lines, significantly cutting installation time and labor cost.Third, Aurashu modules support parallel hydraulic design and standardized water connections, allowing quick coupling of modules with minimal engineering work. The factory-tested refrigerant circuits eliminate the need for on-site refrigerant charging or vacuum operations, improving safety and reducing technical difficulty.Fourth, installation is simplified by intelligent control integration. The master–slave communication network automatically recognizes new modules, balancing load distribution and enabling N+1 redundancy. No complex programming is required during commissioning, and the system can be operational rapidly after installation.Finally, the air-source configuration removes the need for boiler rooms, chimneys, fuel storage, or gas pipelines. This makes the system exceptionally suitable for rooftop installation, narrow machinery rooms, and retrofit buildings where traditional heating systems are difficult to accommodate. In snowy, humid, or extremely cold regions, the optimized frosting–defrosting design ensures stable outdoor operation without special structural requirements.Overall, Aurashu’s modular units offer fast installation, flexible expansion, safer construction, lower labor costs, and simplified commissioning—making them a highly efficient choice for commercial buildings, residential communities, industrial heating, and district energy projects.

Yes, Aurashu’s Integrated Low-Temperature Heating Modular Unit fully supports modular installation, and this design is one of the core advantages of the system. Modular architecture significantly improves flexibility, scalability, construction convenience, and long-term operational reliability. By integrating advanced EVI low-temperature compressors, high-efficiency heat exchangers, unified intelligent control, and standardized hydraulic/piping interfaces, the system enables fast deployment, phased investment, and precise capacity matching for projects of various sizes.From an engineering perspective, modular installation means each unit functions as an independent heating and cooling module, capable of operating alone or in synchronized coordination with multiple units. For small applications, a single module can meet basic heating or cooling demand. For medium and large commercial projects, multiple modules can be combined—typically 2–16 units—to form a centralized, high-capacity system without requiring a large mechanical room or complicated construction.Aurashu applies a “plug-and-run” modular strategy: factory-tested modules are pre-configured with optimized refrigerant circuits, electronic expansion valves, and control parameters. Once delivered onsite, installers only need to connect water pipes, power supply, and communication cables. This approach dramatically shortens installation time, lowers labor cost, and minimizes commissioning errors.Modular design also solves a major challenge in cold-climate heat pump operation—capacity decay and load fluctuation. With multi-module intelligent scheduling, the controller automatically adjusts each module’s output based on real-time building load. When heating demand is low, only one or two modules run at partial load to ensure efficiency; when demand peaks, all modules start in sequence to deliver full capacity. The built-in balancing algorithm distributes operating hours evenly among modules, reducing mechanical wear and extending service life.In addition, modular installation enhances redundancy and operational stability. If one module requires maintenance, the remaining modules continue operating without interrupting heating or cooling supply. This N+1 backup capability is important for hospitals, data centers, hotels, schools, and industrial facilities where continuous operation is essential.Aurashu further improves modular compatibility by adopting unified unit dimensions, standardized anchor points, and matching water-side connections. Modules can be installed side-by-side or stacked (depending on model), enabling flexible adaptation to rooftop, outdoor yard, or equipment platform layouts. For decentralized heating or renovation projects, modules can be delivered and installed in phases, allowing customers to expand capacity with minimal additional construction cost.With support for centralized BMS integration, RS485 communication, remote diagnostics, and cloud monitoring, multiple modules behave like a single, intelligent system. Operators can view system status, module load rates, energy consumption, and operational data in real time, ensuring efficient management.Overall, Aurashu’s modular installation solution provides unmatched flexibility, easy expansion, stable performance, and superior lifecycle cost advantages, making it ideal for residential communities, commercial complexes, industrial plants, schools, hotels, and cold-climate district heating networks.

Aurashu’s integrated low-temperature heating modular units are engineered for a wide range of commercial, industrial, and residential applications that require stable performance in cold, humid, or highly variable climates. Thanks to advanced inverter scroll or EVI scroll compressor technology, intelligent multi-module coordination, efficient heat exchangers, and flexible capacity configuration, these units support both heating and cooling with exceptional reliability, making them suitable for projects with stringent comfort, efficiency, and operational demands.1. Commercial BuildingsThese units are widely applied in large-scale commercial buildings where stable indoor temperature and high efficiency are priorities. Typical applications include:Office buildingsShopping malls and retail complexesHotels and resortsHospitals and medical facilitiesIn such environments, the system provides low-temperature heating during winter, comfortable cooling in summer, and stable year-round climate control. Intelligent load modulation allows the system to match fluctuating occupancy levels, ensuring high efficiency and reduced operation cost.2. Residential and Multi-Housing ProjectsFor residential districts in cold climates, particularly where air-source heat pumps must operate under –20°C or lower, Aurashu modular units deliver dependable heating, domestic hot water, and optional cooling. Suitable applications include:Apartment complexesVillas or high-end residential communitiesMixed-use residential-commercial buildingsThe modular form factor makes installation flexible even in limited space, while noise-optimized design ensures quiet operation suitable for residential zones.3. Industrial FacilitiesAurashu modular units also meet the needs of industrial processes that rely on stable low-temperature heating or cooling. Common examples include:Manufacturing plantsElectronics and semiconductor facilitiesFood processing and refrigeration environmentsWarehouses and logistics centersIndustrial applications benefit from precise temperature control, high reliability under continuous operation, and scalable system capacity through multi-module expansion.4. Educational, Cultural & Government BuildingsPublic-sector facilities require sustainable, cost-effective heating solutions that comply with modern efficiency standards. These heat pump systems are widely used in:Schools and universitiesLibraries and museumsGovernment buildingsCommunity centersLong service life, low operating noise, and easy maintenance align well with public-sector expectations and long-term investment plans.5. Cold-Climate Regions & High-Humidity ClimatesAurashu’s EVI low-temperature technology and optimized frost-resistant design make the units suitable for:Northern cold regions (down to –35°C ambient)Coastal, rainy, or high-humidity areasMountainous or high-altitude zonesThe system continues operating even in severe frost conditions, maintaining heat output through enhanced vapor injection and intelligent defrost strategies.6. District Heating & Central Energy SystemsFor cities upgrading traditional boiler systems or expanding clean-energy heating networks, these units are ideal for:District heating pipelinesCentralized heat pump energy stationsCampus-wide heating and cooling systemsTheir modular architecture allows gradual capacity scaling—important for large infrastructure projects that must balance cost, reliability, and energy efficiency.7. Commercial Hot Water & Heat Recovery ProjectsThe units can also serve applications that require large volumes of sanitary hot water or integrated heat recovery:Hotels and resortsGyms and recreation centersSwimming pool heatingRestaurants and central kitchensOptional high-temperature configurations meet domestic hot-water output requirements efficiently, reducing reliance on boilers.Why These Applications Work WellAurashu’s modular units excel in these scenarios due to:Flexible capacity (10%–100% modulation)Multi-module redundancy for uninterrupted operationLow ambient heating performance (EVI technology)Compact installation footprintLower operating cost vs. boilers or electric heatersSmart BMS integration for unified controlOverall, the integrated low-temperature modular heat pump is a universal, high-efficiency solution suitable for environments that demand stable heating, cooling, and hot water in a compact, scalable, energy-saving package.

Aurashu’s Integrated Low-Temperature Heating Modular Units use advanced compressor technologies specifically engineered to maintain stable heating capacity under extremely cold ambient temperatures. Because low-temperature air-source heat pumps face significant challenges—such as reduced refrigerant evaporation pressure, increased frost formation, and higher compression ratios—the selection and optimization of the compressor directly determine the unit’s efficiency, reliability, and long-term operating cost.1. Enhanced Vapor Injection (EVI) Scroll CompressorsThe primary compressor type used in most Aurashu low-temperature heating modular units is the EVI scroll compressor. EVI technology introduces a secondary vapor injection cycle to increase mass flow, boost discharge temperature stability, and strengthen heating output even at –25°C to –35°C ambient conditions.Benefits include:Higher heating capacity in cold climates compared to standard scroll compressorsImproved COP due to optimized compression ratioReduced discharge temperature stress on key componentsStronger frost resistance thanks to stable refrigerant circulationSmooth, low-noise operation ideal for modular systemsEVI scroll compressors are the best combination of performance, efficiency, and cost for modular low-temperature heat pump applications.2. Inverter (Variable-Speed) Scroll CompressorsFor projects requiring superior part-load performance or ultra-precise temperature control, Aurashu integrates DC inverter scroll compressors. These compressors adjust speed continuously to match actual heating or cooling demand.Key advantages:30–50% energy savings at part loadFewer start–stop cycles, prolonging compressor lifespanMore stable supply water temperature, essential for radiant heating or fan-coil systemsLower seasonal operating cost (SCOP/SEER improvement)Aurashu often combines inverter compressors with EVI design to ensure both high efficiency and strong low-temperature heating capability.3. Twin-Rotary Compressors (Option Based on Capacity)In specific small-to-medium capacity modules, twin-rotary compressors may be used. They provide smoother rotation and lower vibration, making them suitable for residential and light-commercial modular applications.Advantages:Very quiet operationHigh stability at low speedsGood efficiency across broad temperature rangesThough not as powerful at extreme cold as EVI scroll types, they offer excellent comfort and energy reduction for milder climates.4. Semi-Hermetic or Hermetic Scroll Compressors (Optional for Large Modules)For certain high-capacity modular configurations, Aurashu offers heavy-duty scroll or semi-hermetic compressor options. These are designed for:Higher pressure loadLonger running cyclesStronger mechanical durabilityThey are typically paired with optimized heat exchangers and advanced electronic expansion valves for maximum heating output under demanding conditions.5. Multi-Module Compressor CoordinationA key advantage of Aurashu’s modular architecture is intelligent compressor scheduling across modules.System logic provides:Balanced runtime for all compressorsOptimized defrost sequencingStaged or variable output across multiple modulesIncreased redundancy and reliabilityEven if one compressor fails, the unit continues operating, ensuring uninterrupted heating during cold seasons.6. Refrigerant Compatibility and Low-GWP OptionsAurashu compressors support multiple refrigerants depending on project requirements:R410A for strong low-temperature capacity and stabilityR32 for higher efficiency and lower environmental impactOther low-GWP refrigerants (optional) for future complianceCompressor design is selected specifically to match refrigerant behavior under cold-climate heating cycles.7. Why Aurashu Selects These Compressor TypesAurashu’s design philosophy focuses on maximum reliability, efficiency, and cold-climate performance, which is why the chosen compressor types offer:Proven durability in sub-zero environmentsLong operating life and low maintenance needsHigh energy efficiency at both full and part loadExcellent adaptability when multiple modules operate togetherThese compressor selections ensure that Aurashu’s Integrated Low-Temperature Heating Modular Units consistently deliver heating even under harsh climates, making them suitable for commercial buildings, residential projects, industrial facilities, and multi-block heating systems.

An Integrated Low-Temperature Heating Modular Unit is an advanced air-source heat pump system engineered to deliver stable, high-efficiency heating in cold and fluctuating climate conditions. Unlike conventional heat pumps that experience rapid performance degradation at low outdoor temperatures, this modular unit uses enhanced vapor injection (EVI) compressors, optimized low-temperature refrigerant circuits, and high-efficiency heat exchangers to maintain strong heating capacity even when ambient temperatures fall to –35°C.The term “modular” refers to the system’s scalable architecture. Each module operates as an independent heat pump, and multiple modules can be interconnected to form a larger centralized heating system. This offers outstanding flexibility for commercial buildings, industrial facilities, residential communities, hotels, schools, hospitals, and district heating networks. Modules can be added, removed, or serviced without shutting down the entire system, significantly improving reliability and operational continuity.Aurashu integrates smart control algorithms that automatically balance module load, optimize COP in real time, and manage defrosting cycles to minimize heat loss in snowy or humid climates. Intelligent group coordination ensures that only the necessary modules run at partial loads—reducing energy consumption, lowering operating cost, and extending equipment lifespan.In addition to heating, the integrated unit generally supports cooling and domestic hot water, making it a multifunctional HVAC solution. The system leverages environmentally friendly refrigerants, low-noise fan motors, and structural anti-frost design for improved durability. Aurashu’s engineering also includes tailored coil treatments, hydrophilic fin surfaces, advanced defrost logic, and weather-resistant housing to enhance performance in harsh environments.Overall, an Integrated Low-Temperature Heating Modular Unit is designed for customers seeking stable performance, high energy efficiency, modular scalability, and year-round comfort. With Aurashu’s engineering capabilities, each system can be customized to meet specific climate, load, installation, and building-management requirements—ensuring dependable long-term operation in modern commercial and residential heating projects.