HTCY LX-S12-BHP Circulating Chiller

Overview

The HTCY LX-S12-BHP Circulating Chiller is an integrated, air-cooled refrigeration system engineered for precise thermal management of laboratory instruments requiring stable coolant delivery—including spectrophotometers, ICP-OES/MS systems, laser sources, rotary evaporators, and NMR pre-cooling circuits. It operates on a vapor-compression cycle using R22 refrigerant and features a hermetic 0.5 HP compressor coupled with a high-efficiency finned-tube condenser and optimized airflow design (rated exhaust volume: 600 m³/h). Temperature control is achieved via fast bypass regulation—a dynamic proportional-integral (PI) algorithm that modulates coolant flow between the reservoir and heat exchanger to minimize thermal lag and suppress overshoot. The chiller maintains setpoint stability within ±0.3 °C across its operational range of 8–30 °C, with display resolution of 0.1 °C and long-term temperature drift ≤±0.3 °C under steady-state conditions. Its stainless-steel reservoir (7.8 L capacity) and fully corrosion-resistant fluid path—comprising stainless-steel multistage centrifugal pump (370 W, 27 m head), PVC and 316 stainless-steel tubing, and DN15 internal-thread inlet/outlet ports—ensure compatibility with deionized water, purified water, and low-conductivity aqueous coolants.

Key Features

• Integrated air-cooled architecture with compact footprint (435 × 560 × 760 mm) and low acoustic signature (52 dBA at front panel)
• Stainless-steel reservoir and wetted components resistant to oxidation and electrolytic corrosion—enabling use with DI water without scaling or microbial proliferation risks
• High-performance circulation pump delivering 30 L/min at 0.27 MPa pressure, with adjustable flow limiter (default setting: 2.0 L/min) and integrated flow interruption protection
• LCD-based microprocessor controller with real-time temperature monitoring, dual-stage over/under-temperature alarm outputs (configurable as normally open or normally closed), and automatic fault logging
• Robust thermal regulation architecture featuring fast bypass control logic, eliminating need for external thermostatic valves or secondary controllers
• Compliance-ready interface support: analog 0–5 V / 4–20 mA temperature output, digital RS485 Modbus RTU port for integration into centralized lab monitoring systems

Sample Compatibility & Compliance

The LX-S12-BHP is designed for continuous-duty operation in ISO 17025-accredited laboratories and GxP environments where thermal consistency directly impacts measurement integrity. Its stainless-steel fluid circuit meets ASTM F2217 requirements for material compatibility with purified water systems. The unit supports GLP/GMP traceability through event-driven logging of temperature excursions, pump runtime, compressor cycles, and alarm triggers—data accessible via USB export or optional Ethernet gateway. While not certified to UL 61010-1 or IEC 61000-6-3 out-of-the-box, it conforms to EMC Class B emission limits and includes internal overcurrent (6.2 A nominal), high-pressure cutout, and dry-run protection per IEC 60335-1 safety principles. All electrical interfaces are isolated and rated for industrial laboratory ambient conditions (IEC 60529 IP20).

Software & Data Management

The embedded controller provides local HMI functionality only—no proprietary software installation required. All configuration parameters (setpoint, hysteresis, alarm thresholds, pump speed profile) are stored in non-volatile memory with battery-backed retention (>10 years). Optional HTCY LabLink Gateway (sold separately) enables remote monitoring via web browser or SCADA platforms using standard HTTP/HTTPS and Modbus TCP protocols. Audit trail records—including operator ID (if network-authenticated), timestamped parameter changes, and alarm acknowledgments—are retained for ≥30 days and exportable as CSV. The system supports FDA 21 CFR Part 11 compliance when deployed with validated identity management and electronic signature workflows.

Applications

• Thermal stabilization of analytical instrumentation: UV-Vis, FTIR, and fluorescence spectrometers requiring consistent detector and optical bench temperatures
• Cooling of plasma sources in ICP-OES and ICP-MS systems to maintain nebulizer efficiency and reduce polyatomic interferences
• Heat extraction from high-power lasers (e.g., CO₂, Nd:YAG) and diode-pumped solid-state (DPSS) modules
• Condenser cooling in rotary evaporation systems operating under reduced pressure, minimizing solvent loss and improving recovery yield
• Pre-chilling of sample streams prior to LC-MS injection or capillary electrophoresis separation
• Support of calorimetry rigs and rheometry cells requiring isothermal boundary conditions during extended kinetic measurements

FAQ

What coolant fluids are compatible with the LX-S12-BHP?
Deionized water, purified water, and water-glycol mixtures (≤30% v/v) are approved. Avoid ethylene glycol above 30% concentration due to increased viscosity and reduced heat transfer coefficient.
Can this chiller operate continuously at 8 °C ambient temperature?
Yes—the air-cooled condenser is rated for ambient operation between 5 °C and 35 °C. At low ambient temperatures, the bypass control algorithm prevents evaporator freezing by modulating refrigerant flow and maintaining minimum compressor run time.
Is the flow rate adjustable beyond the default 2.0 L/min limit?
Yes—flow can be manually adjusted between 0 and 30 L/min using the integrated needle valve; however, sustained operation below 5 L/min may trigger low-flow alarms depending on connected load impedance.
Does the unit include a drain valve for maintenance?
Yes—a DN15 internal-thread drain port is located at the lowest point of the reservoir for complete fluid evacuation during servicing or winterization.
What is the expected service interval for the R22 refrigerant charge?
R22 is sealed for life under normal operation. Leak detection is performed during annual preventive maintenance; recharging requires certified EPA Section 608 technicians and documented leak repair verification.