Tongzhou Weipu AL Series Water-Cooled Circulating Chiller

Overview

The Tongzhou Weipu AL Series Water-Cooled Circulating Chiller is an integrated, industrial-grade temperature control system engineered for stable, high-capacity heat removal in laboratory and production environments. Unlike air-cooled chillers, the AL Series utilizes an external water source—such as a facility’s centralized cooling tower loop or industrial chilled water network—as its condensing medium. This design eliminates internal heat rejection into the ambient lab space, reduces acoustic emissions (<65 dB(A) at 1 m), and achieves a significantly higher power density per footprint. The chiller operates on a vapor-compression refrigeration cycle with R410A or R134a refrigerant (model-dependent), and is optimized for continuous-duty applications requiring precise thermal management of heat-generating equipment.

Key Features

• Stainless steel top-mounted reservoir (20 L capacity) with smooth-welded interior and drain valve for rapid cleaning and contamination control;
• Multi-stage centrifugal circulation pump constructed from stainless steel, delivering up to 30 L/min at 2.0 bar maximum head pressure;
• Corrosion-resistant fluid path: all wetted components—including piping, fittings, and heat exchangers—fabricated from 304 stainless steel or PPR polymer to prevent leaching and scaling;
• Full-access removable front and side panels for unobstructed service access to compressor, condenser, expansion valve, and electrical cabinet;
• Microprocessor-based controller with dual digital display (setpoint & actual temperature), intuitive membrane keypad interface, and real-time status indicators;
• Comprehensive safety architecture: compressor discharge overtemperature protection, high/low refrigerant pressure cutoffs, phase sequence and phase loss detection, motor overcurrent protection, and evaporator freeze prevention logic;
• Optional PID temperature controller upgrade available for enhanced stability (±0.1 °C under steady-state conditions);
• Optional dual-stage filtration package: 5-µm polypropylene sediment filter + mixed-bed ion exchange resin cartridge, certified for conductivity reduction to <1 µS/cm and particle retention down to 1 µm.

Sample Compatibility & Compliance

The AL Series is compatible with deionized water, 30–50% ethylene glycol/water mixtures, and other non-corrosive heat transfer fluids meeting ASTM D1384 and ISO 2107 standards. Its closed-loop architecture prevents evaporation loss and minimizes microbial growth risk when operated with biocide-compatible additives. The unit complies with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions), meets CE marking requirements under the EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU, and supports GLP/GMP-aligned operational documentation including audit trails for setpoint changes and alarm events (when equipped with optional data logging module).

Software & Data Management

Standard configuration includes RS485 Modbus RTU communication for integration into building management systems (BMS) or SCADA networks. An optional Ethernet-enabled controller provides HTTP-based remote monitoring, configurable email/SNMP alerts, and CSV export of time-stamped temperature, pressure, and runtime logs. All firmware adheres to secure boot protocols and supports password-protected parameter locking—critical for regulated environments governed by FDA 21 CFR Part 11 where electronic records and signatures apply. Calibration certificates traceable to NIST standards are available upon request.

Applications

The AL Series serves as a primary cooling solution for high-heat-load analytical and manufacturing instrumentation, including but not limited to: X-ray diffraction (XRD) and X-ray fluorescence (XRF) spectrometers; RF-powered vacuum sputtering and electron beam evaporation systems; high-power CO₂ and fiber laser sources (≥1 kW); induction heating and vacuum annealing furnaces; pharmaceutical lyophilizers and reactor jacketing systems; and large-format optical interferometers requiring sub-millikelvin thermal drift control. Its scalable platform (5–200 kW models) supports both single-instrument and multi-zone distribution via manifolded secondary loops.

FAQ

What external cooling water specifications are required for optimal operation?
Minimum supply: 18–32 °C inlet temperature, 3–6 bar pressure, flow rate ≥1.5× chiller’s condenser duty (e.g., ≥8 m³/h for AL10 model), with total dissolved solids (TDS) <250 ppm and pH 6.5–8.5.

Can the AL Series operate with glycol-based coolant in the user circuit?
Yes—up to 50% propylene or ethylene glycol by volume is supported; viscosity and specific heat corrections must be applied during system sizing to maintain minimum Reynolds number (>2300) in user-side piping.

Is remote firmware update capability available?
Firmware updates require local USB connection and authenticated technician credentials; over-the-air updates are intentionally disabled to preserve system integrity in validated environments.

Does the unit include a factory calibration certificate?
Each unit ships with a performance verification report (including cooling capacity, temperature stability, and pump curve validation) referenced to ISO 5149-2 and ISO 13256-1 test protocols; NIST-traceable calibration is offered as an add-on service.