This document describes the MAGAPOR Z-450 Preservation Unit, a specialized chamber designed for the preservation of biological doses, specifically semen, in professional farm and laboratory settings. It is not intended for food storage or other applications.
Function Description:
The Z-450 is a preservation chamber engineered to maintain seminal doses at a constant temperature ranging from 15°C to 40°C. It features a digital regulator for precise temperature control and an alarm system to alert users to any significant temperature deviations that could compromise semen preservation. To ensure uniform temperature distribution within the chamber, it incorporates a forced-ventilation system that guarantees continuous air recirculation. The interior design facilitates automatic collection and evaporation of condensates.
Important Technical Specifications:
- Model: Z-450 (part of the MAGAPOR Z-100, Z-300, Z-450 series)
- Supply Voltage and Frequency: 220-240V 50Hz
- Refrigerant Fluid: R-600a / 36g
- Nominal Power: 270 W
- Maximum Current at Compressor Start-up: 10 A
- Nominal Useable Volume: 344 liters
- Maximum Number of Doses: 650 blisters / 600 tubes / 650 jars
- Temperature Measurement Resolution: 0.1°C
- Temperature Range: 15°C to 40°C, with an accuracy of +/-0.5°C
- External Dimensions: 595 mm (width) x 735 mm (depth) x 1850 mm (height)
- Unladen Weight: 76 kg
- Operating Conditions:
- For use within laboratories
- Ambient temperature: 5-40°C
- Maximum altitude: 2000 m
- Relative humidity: 80% at 31°C up to 50% at 40°C
- Maximum voltage fluctuations in electricity supply: +/- 10%
- Category II transient overvoltage
Usage Features:
The Z-450 is equipped with user-friendly controls located on the door, including a digital regulator, an illuminated On/Off switch, and a removable fuse-holder.
- Installation: After installation, it is recommended to wait approximately 24 hours before switching on the unit to allow the compressor oil to settle and prevent refrigerant fluid contamination. The unit should be connected to the electrical grid and then powered on via the general switch.
- Temperature Control: The digital regulator continuously displays the internal temperature measured by a probe. The factory default working temperature is 16°C. To modify the set temperature:
- Press and release the 'SET' key. The display will show "SP" alternating with the current set point value.
- Use the arrow keys to adjust the value.
- Press and release 'SET' again to confirm and save the new value.
The regulator will then initiate heating or cooling cycles to reach the new set point. LED indicators on the left side of the display show the unit's status (snowflake for cooling, sun for heating).
- Alarm System: The thermostat includes a buzzer to alert the operator to temperature anomalies caused by technical failure, an open door, or a power cut.
- If the temperature deviates by more than 1.5°C (in any direction) from the set temperature for over ten minutes, the buzzer will sound. For example, if set to 16°C, an alarm will trigger if the temperature rises above 17.5°C or falls below 14.5°C for more than ten minutes.
- When the alarm sounds, "Hi" or "Lo" will be displayed to indicate an excess or deficit in temperature.
- The buzzer automatically stops, and the message disappears once the temperature returns to normal. The buzzer can also be silenced manually by pressing any key.
- Placement: The unit should be situated away from aggressive heat or cold sources and direct sunlight. Adequate ventilation around the back of the unit is crucial for proper cooling of the condenser circuit. The machine is heavy and requires careful handling by two people during transport and placement. Ensure the unit is perfectly level to prevent vibrations, noise, and the risk of tipping.
- Electrical Connection: The power cable is located at the rear, near the compressor. It is critical to verify that the installation voltage matches the unit's specification plate and that it is effectively earthed according to electrical regulations. The manufacturer disclaims responsibility for non-compliance with these safety measures.
- Fuse Replacement: In case of a power surge, short-circuit, or excessive consumption, the protective fuse will blow. Always disconnect the unit from the power supply before replacing the fuse. Unscrew the fuse-holder cap counter-clockwise, remove the sheath with the blown fuse, replace it with a new equivalent fuse (a spare is included with the manual), reinsert the sheath, and screw the cap back on clockwise.
Maintenance Features:
Regular maintenance ensures optimal performance and longevity of the Z-450.
- Cleaning:
- For general cleaning, use a soft cloth and washing-up liquid. Avoid aggressive detergents.
- For complete disinfection of the interior, use 70% ethyl alcohol, being careful not to rub adhesive stickers too forcefully.
- Keep the rear grille clean to facilitate heat evacuation, which is essential for efficient cooling.
- If the unit will not be used for an extended period, keep it clean, dry, and leave the door ajar to prevent mold formation.
- Frost and Condensate: At the typical operating temperature of 16°C, excessive frost buildup on the interior cold wall is not expected. Any water droplets that appear will be automatically evacuated and evaporated outside the machine.
- Electrical Connection Care: Connect the power cable gently, avoiding force. Keep the two metal poles of the connector clean to ensure good electrical contact.
- Safety Precaution: Before performing any authorized maintenance or procedure, ensure the unit is disconnected from the electricity supply by unplugging it from the socket.
Useful Advice for Preservation:
- Choose a chamber model with sufficient space for normal and peak production doses.
- Package doses in separate bags or boxes before placing them in the chamber.
- Distribute the load appropriately across shelves, avoiding overfilling any single shelf, to allow free air circulation.
- Always use the original wire shelves provided, as they facilitate air circulation.
- Avoid direct contact between doses and the cold wall (bottom of the container) to prevent freezing.
- Do not position doses too close to, or in direct contact with, the temperature probe or the fan.
- Allow doses to cool before placing them in the chamber to save energy and extend the unit's lifespan.
- Open and close the door as little as possible.
Troubleshooting:
The manual provides a troubleshooting guide for common issues:
- Machine not switching on: Check voltage and fuse, or contact Technical Services for defective cable or regulator fault.
- Machine not cooling: Check for high set point, regulator parameter fault, or refrigeration circuit fault.
- Machine not heating: Check for low set point, regulator parameter fault, or heating circuit fault.
- Compressor or external casing too hot: Relocate the machine if it's inadequately ventilated or exposed to heat sources.
- Internal temperature and displayed temperature mismatch: Contact Technical Services for incorrect internal temperature calibration.
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