ambient, the unit's maximum cold temperature can reach 
.
When a ULT unit has been placed in storage or out of service for a long time, its battery should be tested for low capacity because the battery may have already released all of its energy. It does not mean the unit is in a malfunctioning condition. Should this condition occur, please run the unit for about 6 days to fully charge up the battery.
When the unit operates normally, the unit frame at the front near the door may be slightly warm. This phenomenon is normal because hot tubing is embedded there to prevent condensation from forming on the frame.
Before samples are loaded into the unit, make sure that the unit temperature has reached the set point then load the samples into the freezer in batches. This method can reduce the temperature rise as the load is being introduced.
The temperature display indicates the temperature where the temperature sensor is mounted inside the unit chamber. Temperature uniformity within the chamber may vary from the sensor location due to loading patterns or insufficient temperature stabilization time.
An access port is installed in the back wall of the unit which can be used as the through hole for the thermocouple wires during testing and validation . After all test wires are let through the access port, make sure that the gap in the port is sealed properly with insulation materials. Otherwise, the unit temperature may not come down to the desired temperature. The port ring in the outer wall can also accumulate frost and ice.
When cleaning the unit, mild or neutral detergent solution should be used. (Non- diluted cleaning chemicals can damage the plastic portion of the unit. For directions on making a cleaning solution, please refer to the detergent section in the instructions). Never use a hard wire brush, acid, gasoline, detergent powder, polishing powder, or hot water to clean the freezer as these tools and materials can damage the powder coating and surface of the plastic. Particularly, never use gasoline or a solution with volatile chemicals to clean plastic or rubber parts.
After the freezer runs for some time, a layer of frost usually forms on the interior liner and inner doors. When this layer of frost gets too thick, it can negatively impact the refrigeration performance of the unit. Energy consumption can increase. If the thickness reaches about 5 millimeters, please use the provided scraper to remove the frost.
Before removing the frost, temporarily transfer the stored samples to another freezer. This reduces the chance of property loss due to rising temperatures.
If the freezer is not in use for a long time, please turn off the power and switch off the backup battery. The power cord should be unplugged.DW-86L386, DW-86L288, DW-86L626, DW-86L388, DW-86W420 specifications
Haier's line of biomedical freezers, including the DW-86L628, DW-86W420, DW-86L388, DW-86L626, and DW-86L386, showcases the company's commitment to innovation, reliability, and advanced technology in preserving sensitive biological materials. These models are designed to meet the needs of laboratories, hospitals, and research institutions, providing optimal storage solutions for a variety of critical applications.The DW-86L628 is recognized for its impressive capacity of 628 liters, making it ideal for facilities that require large storage volumes. It features a temperature range of -10°C to -86°C, ensuring that vaccines, biological samples, and pharmaceuticals are stored under precise conditions. With a powerful refrigeration system and an efficient insulation design, this model ensures rapid cooling and maintains consistent temperatures.
The DW-86W420, on the other hand, balances capacity with energy efficiency. This model offers a slightly smaller design, suitable for environments where space is at a premium. It includes a user-friendly digital display that allows for easy monitoring of temperature and system performance, while also providing real-time alerts for any deviations outside of the set parameters. Additionally, it is equipped with a patented eco-friendly refrigerant, reducing the environmental impact while maintaining high performance.
In the DW-86L388, Haier emphasizes robust safety features. This freezer is engineered with a dual-lock system to prevent unauthorized access, alongside an advanced alarm system that notifies users in the event of power failures or temperature fluctuations. This level of security is crucial for laboratories that manage valuable specimens.
The DW-86L626 is tailored for versatility and comes with adjustable shelving and organization options, allowing users to configure the interior to suit their storage needs. Its peak temperature recovery time is remarkably quick, ensuring that samples remain secure even after door openings.
Finally, the DW-86L386 combines compact design with advanced technology. It is aimed at users with limited space, yet it does not compromise on storage efficiency. The unit is equipped with energy-saving modes, reducing operational costs while ensuring optimal performance.
In summary, Haier's DW-86 biomedical freezer models stand out for their high performance, reliability, and thoughtful design tailored for the rigorous demands of biomedical storage. With an emphasis on safety, energy efficiency, and user-friendly features, these freezers are a smart choice for any facility focused on preserving vital biological materials.