Specialized medical equipment requires special approach to operation, especially when it comes to the safety of expensive drugs. Refrigerators Pozis Paracels are designed specifically for pharmacies, laboratories and hospitals, where the slightest deviation from the specified regime can lead to spoilage of medicines. Owners of such devices are often faced with the need for precise calibration, since standard household settings are not suitable here.
The adjustment process depends on the specific model and type of installed control system, which can be mechanical or electronic. Accuracy of the set parameters directly affects the service life of the equipment and the safety of stored items. In this article, we will analyze in detail the algorithms of actions for various modifications so that you can be sure of compliance with sanitary standards.
Incorrect settings can cause both hypothermia and defrosting of the contents, which is unacceptable for vaccines and sensitive reagents. Therefore, it is important to carefully study the features of your unit before starting work. Below are step-by-step instructions that will help you set up the equipment without calling a specialist.
Features of thermoregulation in medical refrigerators
The main difference between the series Paracels from household analogues is the expanded range of operating temperatures and increased stability of the climate inside the chamber. The company's engineers Pozis implemented systems that allow maintaining the mode even with frequent door openings or power surges in the network. This is critically important for pharmaceutical institutions that undergo regular inspections.
Most models use dynamic cooling, which ensures uniform distribution of cold throughout the entire volume. However, the user must understand that temperature sensors are located in certain areas, and it is their readings that are displayed on the indicator. Shifting products to the rear wall can distort the real picture of the microclimate.
⚠️ Attention: Medical refrigerators are not intended for storing food products. Using them for household purposes can lead to over-drying of food and the appearance of a specific plastic odor, which is difficult to remove.
The control system may respond to changes with some delay, which is a normal physical feature of the inertia of the refrigerant. After changing the settings, the compressor takes time to reach the new operating mode. You should not try to sharply turn the regulator back and forth in the hope of speeding up the process.
Adjusting the mechanical thermostat
In classic models, such as XM-250 or XM-400, control is carried out using a mechanical rotary regulator. It is usually located inside the camera on the right wall or under the ceiling and is a disk with a digital scale. The numbers on this disk do not indicate degrees Celsius, but indicate cooling intensity.
The higher the numerical value, the colder it will be inside the refrigerator. The standard factory setting usually corresponds to position 2 or 3. If you need to lower the temperature, you should turn the knob towards higher values. However, this must be done gradually, waiting for the regime to stabilize within 6-8 hours.
- 🌡️ Position
1— minimum cooling, temperature can reach +10..+12°C. - ❄️ Position
3— the optimal mode for most medications (+2..+6°C). - 🧊 Position
Maxor5—intensive freezing or rapid cooling mode, not suitable for permanent storage.
In summer, when the room is hot, you may need to set the regulator to a higher value than in winter. This compensates for heat inflows through the walls of the case.
Setting up an electronic controller
Modern series, for example Paracels-260 or RF-250, are equipped with microprocessor controllers with a digital display. Here, the temperature is adjusted with an accuracy of 0.1 degrees, which meets the strict requirements of pharmaceutical standards. The interface usually consists of a screen and several control buttons.
To enter parameter editing mode, you must press and hold the settings button (often indicated as Set or represented by a gear symbol) for 3-5 seconds. The current target value will flash on the screen. Using the arrow buttons ▲ and ▼, set the required temperature threshold.
After selecting the desired value, you need to confirm the action by briefly pressing the button Set or OK. The system will automatically save the new settings. In some models, a sensor calibration mode is also available, but its use requires a reference thermometer and should only be carried out by qualified personnel.
⚠️ Attention: In the event of a power failure, electronic controllers Pozis save settings in non-volatile memory. However, after switching on, the device may start working with a delay to protect the compressor.
☑️ Checking the electronics settings
Optimal temperature conditions for storage
The choice of the correct temperature depends solely on the type of drugs being stored. There is no universal value, although most vaccines and insulins require a range +2..+8°C. Exceeding the upper threshold can lead to denaturation of proteins, and excessive cooling can lead to crystallization of the solution.
The storage of some specific reagents or blood samples may require lower temperatures, down to 0°C, but not lower, to avoid freezing of water in solutions. The table below shows recommendations for the main groups of medications.
| Type of drug | Recommended regimen | Permissible fluctuations | Risks of violation |
|---|---|---|---|
| Vaccines (DPT, hepatitis) | +2..+8°C | ±1°C | Loss of effectiveness |
| Insulins | +2..+8°C | ±1.5°C | Change in structure |
| Antibiotics (suspensions) | +2..+8°C | ±2°C | Decreased activity |
| Blood samples/biomaterial | +4..+6°C | ±0.5°C | Sample hemolysis |
It should be taken into account that the temperature may vary on different shelves. The top shelf is usually warmer, while the back wall is cooler. Place the most sensitive medications in the central part of the chamber, away from vents and doors.
Why can't you store medications near the door?
The door is the warmest area of the refrigerator, where the temperature fluctuates the most due to frequent opening. In addition, condensation often accumulates there, which can damage paper packaging and instructions for the drugs.
Diagnostics and troubleshooting
If, after setting, the temperature inside the chamber does not stabilize or the indicators show an error, it is necessary to carry out an initial diagnosis. Often the problem lies not in a breakdown, but in improper operation or external factors. Self-diagnosis system Modern models may indicate an error code on the display.
One of the common reasons is a loose door seal or overloading the chamber with products, which disrupts air circulation. It is also worth checking that the ventilation hole inside the camera is not blocked by foreign objects or packaging.
- 🔌 Check the integrity of the power cable and the presence of voltage in the socket.
- 🚪 Make sure that the door closes tightly and is not warped.
- 🌬️ Inspect the capacitor from the back for dust contamination.
If codes appear errors, such as E1 (evaporator sensor malfunction) or E2 (camera sensor malfunction), it is recommended to contact a service center. Self-repair of electronic units may lead to loss of warranty.
⚠️ Attention: If you notice frost on the back wall while the compressor is running, this may indicate a malfunction of the defrost system or a freon leak. Operation in this mode is prohibited.
Rules for placing food for uniform cooling
Even a perfectly tuned refrigerator Pozis Paracels will not work effectively if the loading rules are violated. Air should circulate freely throughout the entire volume of the chamber, washing each preparation. Dense packing of boxes “back to back” creates thermal pockets where the temperature can differ significantly from the set one.
Use special baskets and trays if they are provided for in the design of your model. They help structure the space and prevent drugs from falling to the bottom. Always place heavy containers on the lower shelves, and light and sensitive containers on the middle levels.
Do not place medications directly next to a vent where cold air comes out. Direct flow can locally supercool the ampoules, even if the general background temperature is normal. The optimal distance from the back wall to the package is at least 3-5 centimeters.
Is it possible to defrost a refrigerator with medicines?
Absolutely not. For medical refrigerators, an automatic defrosting system or dry cooling is provided. If the model requires manual defrosting, the preparations must be temporarily moved to another refrigerator with a similar temperature regime.
Maintenance and calibration
Regular maintenance extends the life of the equipment and ensures accurate temperature maintenance. Once every six months, it is recommended to carry out a visual inspection and clean the condenser from dust using a soft brush or vacuum cleaner. A clogged heat exchanger causes the compressor to work overload.
The internal chamber should be wiped with a disinfectant solution approved for use in medical institutions. Do not use abrasive powders or harsh chemicals as they may damage the plastic housing and seals. After wet cleaning, the door should remain open until completely dry.
Calibration of temperature sensors should be carried out by metrological service specialists at least once a year. For this purpose, verified thermometers are used, which are placed in the chamber along with reference samples. The results are recorded in the temperature log.
How often should you check the temperature manually?
According to GSP (Good Storage Practice) rules, the temperature in the refrigerator with medicines must be recorded at least twice a day (morning and evening), even if the device is equipped with an electronic monitor. The data is recorded in a special journal.
What to do if the temperature rises above +8°C?
Immediately isolate drugs exposed to heat in a quarantine zone. Check the operation of the equipment and eliminate the cause of the failure. The preparations should not be used until a conclusion from the manufacturer on suitability or disposal has been received.
Can the Pozis Paracels refrigerator be transported lying down?
Transportation in a lying position is not recommended, but is allowed if precautions are taken. After transportation, the device must stand in a vertical position for at least 24 hours before turning on, so that the oil completely drains into the compressor.
Why does the compressor hum after setting?
When the target temperature changes to a lower one, the compressor can work in increased mode for a long time. This is fine. If the noise is accompanied by vibration or knocking, check the stability of the refrigerator installation and the adjustment of the legs.
What refrigerant is used in the Paracels model?
Most modern models use environmentally friendly refrigerant R600a (isobutane). It has excellent refrigeration properties, but requires care when repairing due to its flammability. The exact information is indicated on the nameplate on the back.