ZEDO ZD-8240C Pool-Specific Condensation-Control Dehumidifier

Overview

The ZEDO ZD-8240C Pool-Specific Condensation-Control Dehumidifier is an engineered solution for maintaining precise hygrothermal equilibrium in indoor aquatic facilities. Unlike general-purpose dehumidifiers or HVAC-based ventilation strategies, this unit employs refrigerant-cycle condensation technology—optimized for high-moisture-load environments where continuous water evaporation from pool surfaces drives latent load accumulation. It operates on the principle of cooling saturated air below its dew point within a dedicated evaporator coil, thereby extracting condensed moisture while recovering sensible energy via an integrated hot-gas reheat circuit. This architecture ensures stable relative humidity (RH) control between 40% and 70% RH—critical for mitigating structural corrosion, microbial proliferation, and occupant respiratory discomfort. Designed specifically for natatoriums, leisure centers, and therapeutic hydrotherapy pools, the ZD-8240C addresses the unique thermodynamic challenge posed by large surface-area water bodies operating at elevated temperatures (typically 26–28 °C), which generate sustained vapor pressures exceeding standard commercial space thresholds.

Key Features

• High-capacity compressor-driven dehumidification system delivering 240 liters per day under ASHRAE Standard 160 test conditions (30 °C DB / 24 °C WB)
• Dual-stage corrosion-resistant construction: epoxy-coated aluminum finned-tube evaporator and condenser, combined with marine-grade stainless-steel mounting hardware and drain pan
• Intelligent humidity regulation via PID-controlled touchscreen HMI, supporting programmable RH setpoints, weekly scheduling, and alarm-triggered notifications (e.g., high humidity, filter clogging, coil frost detection)
• Integrated hot-gas reheat function maintains supply air temperature within ±1.5 °C of return air—eliminating cold drafts and preventing thermal stratification
• 3000 m³/h axial fan assembly with backward-curved impeller and EC motor, enabling low-noise operation (<62 dB(A) at 1 m) and variable airflow modulation
• Onboard data logging capability stores timestamped ambient RH, dry-bulb temperature, runtime hours, and fault codes on removable SD card—compatible with GLP-aligned audit trail requirements

Sample Compatibility & Compliance

The ZD-8240C is validated for continuous operation in chlorine-laden, high-humidity indoor pool atmospheres (typical Cl₂ concentrations ≤ 0.5 ppm, RH ≥ 85% during peak bather load). Its enclosure meets IPX4 ingress protection standards, and internal components comply with ISO 14644-1 Class 8 cleanroom-compatible material specifications (non-shedding, non-outgassing polymers). Electrical safety conforms to EN 60335-1 (General Requirements) and EN 60335-2-40 (Particular Requirements for Heat Pumps, Air-Conditioners and Dehumidifiers). While not FDA-regulated, its design supports compliance with ASHRAE Standard 110 (Laboratory Ventilation) and ISO 14644-1 for ancillary lab-support spaces adjacent to pool zones. Units are supplied with CE Declaration of Conformity and RoHS-compliant component documentation.

Software & Data Management

The embedded firmware supports Modbus RTU (RS-485) and optional BACnet MS/TP integration for centralized building management system (BMS) interoperability. All operational parameters—including real-time RH deviation, cumulative condensate volume, compressor cycle count, and filter life estimation—are accessible via local HMI or remote web interface (HTTPS-secured). Data export follows CSV format compliant with ASTM E2911-13 (Standard Practice for Digital Recording of Environmental Monitoring Data). Audit logs retain full traceability per ISO/IEC 17025:2017 Clause 7.9.2, including user login history, parameter modification timestamps, and calibration event records.

Applications

• Indoor competition swimming pools requiring strict RH control per FINA Facility Guidelines (target 50–65% RH at 28 °C)
• Rehabilitation and hydrotherapy centers where humidity-induced mold growth compromises sterile zone integrity
• University aquatic research laboratories housing instrumentation sensitive to condensation (e.g., optical metrology rigs, precision weighing stations)
• Municipal leisure complexes integrating dehumidification with demand-controlled ventilation (DCV) per EN 13779
• Hotel spa facilities requiring simultaneous humidity suppression and thermal comfort preservation without supplemental heating

FAQ

Can the ZD-8240C operate continuously in 35 °C ambient temperatures?
Yes—its R410A refrigerant circuit and oversized condenser enable stable performance up to 38 °C dry-bulb, as verified per AHRI 900 certification protocol.
Does it meet FDA 21 CFR Part 11 requirements for electronic records?
While not a regulated medical device, its audit-trail functionality satisfies predicate criteria for Part 11 compliance when deployed in GxP-aligned environments (e.g., pharmaceutical pilot-scale wet-processing labs adjacent to pool areas).
Is ductwork required for installation?
No—unit is configured for free-air discharge; however, optional flexible duct kits (up to 10 m length) are available for targeted air distribution in vaulted ceiling structures.
How often does the air filter require replacement?
Under typical natatorium conditions (chloramine exposure, moderate dust loading), the MERV-11 pleated filter should be inspected monthly and replaced every 3–4 months—or sooner if differential pressure exceeds 125 Pa.
What maintenance certifications are recommended for service personnel?
Technicians must hold valid EPA Section 608 Type II certification for refrigerant handling, plus manufacturer-specific training on ZEDO’s hot-gas reheat control logic and corrosion-protection protocols.