OPERATING INSTRUCTIONS

Back-up system

WARNING

As with any equipment that uses CO2 gas, there is a likelihood of oxygen depletion in the vicinity of the equipment. It is important that you assess the work site to endure there is suitable and sufficient ventilation. If restricted ventilation is suspected, then other methods of ensuring a safe environment must be considered. These may include atmosphere monitoring and warning devices.

The freezer is provided with an automatic liquid CO2 gas injection device as a back-up system. This freezer prevents the chamber temperature from going up by injecting the liquid CO2 gas when the power supply is disconnected (power failure, disconnection of power cord, breaker OFF) or in the case of failure of freezer itself. The liquid CO2 gas is injected with the activation of solenoid valve energized by battery when the chamber temperature reaches the alarm temperature.

Following shows the procedure for setting the back-up system.

1.Setting of liquid CO2 gas cylinder

By using the joint and pipe enclosed with the freezer, connect the liquid CO2 gas cylinder to the joint of the back-up system. For this setting, consult with a qualified gas supplier or Sanyo sales agency.

2.After setting the liquid CO2 gas cylinder, operate the freezer until the chamber temperature reaches the required level.

3.Set the warning indicator of the recorder at the temperature higher than -70oC. The back-up system is operated continuously if the warning indicator is set at the temperature lower than -70oC. This means the liquid CO2 gas is consumed very quickly.

Rough scheme

Liquid CO2

gas cylinder

 

Battery

 

Solenoid valve

Pipe

 

4.Switch on the back-up system.

5.Make sure that liquid CO2 gas spouts into the freezer chamber by pressing the back-up test switch.

Note:

•The liquid CO2 gas cylinder loses its cooling capacity at speed when the ambient temperature is over 31oC. Install the liquid CO2 gas cylinder in the cool environment. And the duration of back-up time per one liquid CO2 gas cylinder varies depending on the ambient temperature. Refer to “Installation of back-up system” enclosed with the freezer for the available back-up time.

•The liquid CO2 gas cylinder should be a siphon type.

•Use the pipe encloses with the freezer for the setting. (The extension of the pipe is not permitted because of cooling capacity.)

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Sanyo MDF-593C, MDF-793C instruction manual Back-up system, Rough scheme
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MDF-593C, MDF-793C specifications

The Sanyo MDF-793C and MDF-593C are advanced laboratory refrigeration models designed for a variety of applications in research, medical, and industrial settings. Both units embrace cutting-edge technologies and engineering innovations to provide reliable performance while ensuring specimen preservation and optimal storage conditions.

One of the key features of the Sanyo MDF-793C is its ability to maintain a consistent temperature range from -10 to -30 degrees Celsius. This wide range allows users to store a variety of sensitive materials, including biological samples, medications, and vaccines. The unit is equipped with a microprocessor-controlled temperature management system, which offers precise temperature monitoring and control. Additionally, the unit includes a rapid cooling system that ensures quick recovery after door openings, minimizing temperature fluctuations that can compromise stored materials.

The MDF-593C, while slightly smaller in capacity, also offers impressive temperature control and stability. It is designed to have an internal temperature range of -10 to -25 degrees Celsius. Its compact design makes it suitable for labs with limited space, without compromising performance. Both models utilize environmental-friendly refrigerants, which align with current sustainability practices and regulations.

In terms of technological advancements, both models include digital displays that provide real-time temperature readings. These displays come with alarms that notify users of any aberrations, ensuring the highest levels of monitoring and security. The integration of a high-efficiency compressor not only supports rapid cooling but also contributes to lower energy consumption, making both the MDF-793C and MDF-593C cost-effective options for long-term use.

Another standout characteristic is the robust insulation used in the construction of both units. High-density polyurethane foam enhances thermal efficiency and minimizes energy loss. This feature is essential for maintaining optimal internal temperatures while reducing the overall operational costs associated with energy consumption.

Both models also feature adjustable shelving and user-friendly designs, allowing for easy organization and access to stored items. Their durable construction ensures reliability while a sleek external design allows them to fit seamlessly into various laboratory environments.

In summary, the Sanyo MDF-793C and MDF-593C are exemplary choices for those seeking efficient, reliable, and environmentally sustainable refrigeration solutions. Their advanced technologies, coupled with user-friendly features, make them essential tools in ensuring the integrity of valuable samples across various fields.
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