HTCY LX-S20 Integrated Circulating Chiller

Overview

The HTCY LX-S20 Integrated Circulating Chiller is an air-cooled, single-phase laboratory chiller engineered for precision temperature control and stable fluid circulation in analytical instrumentation, laser systems, vacuum pumps, and other heat-sensitive equipment. It operates on the vapor-compression refrigeration cycle using R22 refrigerant and integrates a hermetic scroll compressor (1 HP), high-efficiency finned-tube condenser, expansion valve, and evaporator coil within a compact, self-contained chassis. The unit maintains setpoint temperatures between 8 °C and 30 °C with a stability of ±0.3 °C under dynamic load conditions—achievable through PID-controlled bypass regulation and real-time feedback from a platinum RTD sensor (Pt100) embedded in the reservoir outlet stream. Its stainless-steel reservoir (10.5 L capacity), multi-stage centrifugal pump (370 W, 27 m head), and chemically inert wetted materials—including 316 stainless steel piping and PVC-compatible seals—ensure long-term compatibility with deionized water, glycol-water mixtures (up to 30% v/v), and other non-corrosive coolants.

Key Features

• Integrated air-cooled architecture eliminates dependency on facility chilled water or external cooling towers—ideal for benchtop and mobile lab environments.
• Stainless-steel reservoir and wetted components resist corrosion and microbial growth; validated for use with ultrapure water per ASTM D1193 Type II specifications.
• LCD interface with 0.1 °C display resolution supports intuitive parameter setting, real-time monitoring of outlet temperature, flow rate, and system status, plus configurable alarm thresholds for over-temperature, low-flow, and high-pressure events.
• Dual-mode relay outputs (NO/NC) enable seamless integration into building management systems (BMS) or instrument interlock circuits for automated shutdown during thermal excursion or flow failure.
• Adjustable flow cutoff protection (factory-set at 2.0 L/min, field-configurable) prevents dry-running of connected devices and triggers audible/visual alerts upon sustained deviation from user-defined minimum flow.
• Acoustically optimized fan array (2 × 60 W, 1400 m³/h total airflow) and vibration-damped compressor mounting maintain operational noise ≤56 dBA at 1 m—meeting ISO 7779 Class B criteria for laboratory ambient noise compliance.

Sample Compatibility & Compliance

The LX-S20 is designed for closed-loop circulation with instruments requiring consistent coolant delivery at pressures up to 2.7 bar and flow rates of 30 L/min. Its fluid path meets material compatibility requirements for ISO 8573-1:2010 Class 4 compressed air–adjacent applications and conforms to electrical safety standards IEC 61010-1 (2012) for laboratory equipment. While not certified to UL/CSA or CE for standalone medical device use, its control logic and alarm architecture support alignment with GLP and GMP documentation workflows when deployed in regulated QC/QA labs. The unit complies with RoHS Directive 2011/65/EU regarding hazardous substances and incorporates R22 refrigerant in accordance with national phase-out timelines under the Montreal Protocol Annex A, Group I.

Software & Data Management

The LX-S20 operates as a standalone hardware controller without embedded firmware-based data logging or network connectivity. All operational parameters—including setpoint, actual outlet temperature, pump status, and fault codes—are retained locally on the LCD interface with non-volatile memory backup. For traceability in regulated environments, users may connect optional third-party analog output modules (0–10 V or 4–20 mA) to record temperature and flow signals into LIMS or SCADA platforms. The device supports 21 CFR Part 11–compliant audit trails when integrated via external programmable logic controllers (PLCs) that enforce electronic signature, change control, and data integrity protocols.

Applications

• Cooling of HPLC column ovens, autosamplers, and detector cells to minimize baseline drift and improve retention time reproducibility (ASTM D7093).
• Thermal stabilization of Nd:YAG and diode-pumped solid-state lasers where coolant temperature fluctuation >±0.5 °C induces mode-hopping or beam pointing instability.
• Heat removal from rotary evaporation condensers, vacuum pump jackets, and plasma etch chill plates in semiconductor R&D cleanrooms.
• Supporting electrophoresis power supplies, gel imaging systems, and PCR thermal cyclers requiring stable bath temperatures across extended run durations (>12 h).
• Providing auxiliary cooling for FTIR spectrometer interferometers and CCD detectors to reduce dark current noise and improve signal-to-noise ratio (SNR) in low-light spectroscopy.

FAQ

What is the maximum allowable coolant conductivity for operation with deionized water?
The LX-S20 is rated for continuous operation with water having conductivity ≤1 µS/cm (ASTM D1193 Type I). For extended service life, maintain resistivity >1 MΩ·cm and implement inline 0.22 µm filtration to prevent particulate-induced pump wear.

Can the unit operate at ambient temperatures above 35 °C?
Rated performance assumes ambient conditions ≤32 °C per IEC 60068-2-1. At 35–40 °C ambient, refrigeration capacity declines by ~1.8% per °C rise; full-load operation is not recommended beyond 38 °C without supplemental ventilation.

Is remote start/stop functionality available via digital interface?
No native RS-232, RS-485, or Ethernet port is provided. Remote control requires external relay interfacing through the NO/NC alarm outputs or integration via optional analog I/O expansion modules.

Does the chiller include freeze protection for sub-ambient operation?
The LX-S20 is not designed for sub-zero setpoints. Its minimum operating temperature is 8 °C. Antifreeze additives (e.g., propylene glycol) must be used if ambient storage falls below 5 °C to prevent reservoir freezing.

How often should the air filter and condenser coils be maintained?
Inspect and clean the front-panel air filter every 2 weeks in standard lab environments; perform condenser coil cleaning with compressed air or soft-bristle brush quarterly—or more frequently in dust-rich settings—to sustain ≥95% of rated refrigeration capacity.