ZEDO ZD-8240C Low-Temperature Industrial Dehumidifier
| Brand | ZEDO |
|---|---|
| Model | ZD-8240C |
| Type | Compressor-Based Refrigerant Dehumidifier |
| Dehumidification Capacity | 240 L/day |
| Power Supply | 380 V ~ 50 Hz |
| Input Power | 4900 W |
| Operating Temperature Range | 5–38 °C |
| Noise Level | 52 dB(A) |
| Dimensions (W×D×H) | 770 × 470 × 1650 mm |
| Net Weight | 160 kg |
| Drainage | Continuous via PVC hose |
| Control System | Microprocessor-based with Japanese Shinko high-precision hygrothermometer |
| Safety Protections | High/Low pressure, overload, undervoltage, reverse-phase, 3-minute compressor delay start |
| Filtration | Standard activated carbon filter |
| Airflow Design | Dual-centrifugal impeller, external rotor industrial fan |
| Heat Exchanger | Enhanced-aluminum finned copper tube with internal grooving |
| Refrigerant | Environmentally compliant R-410A or equivalent |
| Compliance | Designed for continuous-duty operation in controlled-environment facilities per IEC 60335-1 and GB/T 19411-2003 |
Overview
The ZEDO ZD-8240C Low-Temperature Industrial Dehumidifier is an engineered solution for precise humidity control in refrigerated and frozen storage environments where conventional dehumidification systems fail. Unlike standard ambient-rated dehumidifiers, the ZD-8240C operates reliably within a broad temperature envelope of 5–38 °C — including sub-zero cold rooms and chilled logistics hubs — using a robust refrigerant-based condensation principle. Its core mechanism relies on forced-air circulation across a high-efficiency, internally grooved copper-tube evaporator with hydrophilic aluminum fins, enabling consistent moisture removal even under low-saturation vapor conditions. This design avoids frost lock-up through intelligent defrost cycling and thermal management, ensuring uninterrupted operation in food-grade cold storage, pharmaceutical bulk repositories, archival vaults, and precision instrument storage areas where RH must be maintained below 50% to prevent condensation-induced corrosion, mold proliferation, or hygroscopic degradation.
Key Features
- Industrial-grade scroll compressor with environmentally compliant refrigerant (R-410A or equivalent), delivering stable performance and extended service life under cyclic low-temperature loads.
- Dual-centrifugal impeller air handling system with external rotor industrial fan — optimized for high static pressure resistance and uniform airflow distribution across large-volume cold chambers (180–240 m²).
- Microprocessor-based controller integrated with Shinko high-accuracy hygrothermometric sensor (±2% RH, ±0.5 °C), supporting programmable setpoint control, real-time monitoring, and event-triggered alarms.
- Modular mechanical architecture separating refrigeration and airflow circuits — facilitating field service, component-level diagnostics, and minimal downtime during maintenance.
- Comprehensive electrical protection suite: high/low refrigerant pressure cutouts, motor overload relays, phase-loss detection, undervoltage lockout, and mandatory 3-minute compressor restart delay to prevent liquid slugging.
- Standard activated carbon pre-filter for particulate and volatile organic compound (VOC) mitigation — critical in food processing and archival applications where odor transfer must be minimized.
Sample Compatibility & Compliance
The ZD-8240C is validated for use in ISO Class 7–8 cleanrooms, GMP-compliant pharmaceutical cold storage (e.g., API intermediate warehouses), USDA-regulated meat and seafood cold chains, and GLP-aligned seed and botanical specimen repositories. It meets structural and safety requirements of IEC 60335-1 (Household and Similar Electrical Appliances) and conforms to China’s national standard GB/T 19411-2003 for dehumidifiers. While not intrinsically rated for explosive atmospheres (ATEX/IECEx), its non-sparking fan motor and grounded chassis support safe deployment in Class I, Division 2 locations when installed per NEC Article 500 guidelines. The unit does not incorporate humidistat-based feedback for FDA 21 CFR Part 11 compliance; however, optional data logging modules (RS485/Modbus RTU) enable integration into validated environmental monitoring systems with audit-trail-capable SCADA platforms.
Software & Data Management
The embedded microcontroller provides local HMI operation via tactile membrane keypad and LCD display showing real-time RH%, temperature, runtime hours, fault codes, and compressor cycle count. No proprietary cloud platform or mobile app is included. For integration into centralized facility management systems, the unit supports Modbus RTU over RS485 (standard) — enabling polling of operational status, setpoint history, and alarm logs by third-party BMS software. Optional analog output (4–20 mA) is available for RH feedback to PLC-controlled HVAC interlocks. All firmware updates require physical USB interface access; no remote OTA capability exists. Data retention is limited to volatile memory — persistent logging requires external SCADA historian or programmable logic controller with SD card or network-attached storage.
Applications
This dehumidifier serves mission-critical roles in environments where dew point suppression directly impacts product integrity: frozen food distribution centers maintaining ≤45% RH to inhibit ice bridging between palletized goods; herbal medicine cold stores preventing mycotoxin formation in dried botanicals; archival cold vaults preserving cellulose acetate film at −18 °C and 30–35% RH; cryogenic instrument enclosures housing electron microscopy sample stages; and low-temperature QC labs storing hygroscopic reference standards (e.g., USP moisture-sensitive calibration materials). It is not intended for ultra-low-temperature applications (<−25 °C) nor for environments requiring sterile air handling (ISO 5 or higher).
FAQ
Can the ZD-8240C operate continuously at −10 °C?
No. Its minimum rated operating temperature is +5 °C. Below this threshold, refrigerant saturation pressure drops significantly, risking oil return failure and compressor damage. For sub-zero applications, desiccant-based or hybrid dehumidification systems are required.
Is condensate drainage compatible with gravity-only setups?
Yes — but only if the discharge point lies ≥1.2 m below the unit’s drain outlet. For level or elevated routing, a condensate pump kit (sold separately) must be installed.
Does the unit comply with EU ErP Directive 2019/2021 energy labeling requirements?
Not natively. As a specialized industrial appliance sold primarily in domestic Chinese markets, it lacks CE-marked energy efficiency classification per EN 12830. Export variants may be configured to meet regional regulatory thresholds upon request.
What maintenance intervals are recommended for long-term reliability?
Compressor oil analysis every 12 months; evaporator coil cleaning every 6 months in high-particulate environments; sensor calibration verification annually using NIST-traceable hygrometers.
Can the ZD-8240C be integrated into a building-wide BMS using BACnet/IP?
Not directly. Native protocol support is limited to Modbus RTU. BACnet/IP integration requires an external protocol gateway with certified interoperability testing.
