Important warnings for the use of air conditioners and refrigerators!

How important it is to turn on the air conditioner and refrigerator once a month!

1. A vehicle equipped with a refrigeration unit is suitable for transporting only pre-cooled or frozen food .

When warm food is loaded into the refrigerator for a long time, the evaporator will freeze up , which significantly reduces the efficiency of the system. In addition, refrigerators have a limited refrigeration capacity, and it will take a very long time to freeze a large mass of food.

In the meantime, there is no need to know about it. ”

2. To reduce the loss of cold, it is advisable to open only one door of the insulated van and leave it open for the shortest possible time. Warm humid air entering the van from the external environment and its subsequent cooling causes condensation of a large amount of water.

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3. Elements and lines of the refrigerator are under high pressure up to 25 atm.

Exercise caution when repairing the car, do not allow any mechanical damage to the parts of the refrigerator.

In the meantime, there is no need to know about it. ”

4. The refrigerant used in the refrigerator decomposes when interacting with an open fire with the formation of highly toxic substances. Avoid using open flames when repairing a car with a refueled refrigerator.

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5. If the car has been in an accident and the refrigeration system is depressurized, you need to as quickly as possible, either re-seal the system, or plug the connectors of the compressor, condenser, evaporator with technological plugs.

Prolonged depressurization leads to the ingress of contaminants into the mains and the impossibility of subsequent restoration of the refrigeration system.

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6. A car with a refueled refrigerator must not be heated above 50 C, for example, dried in a spray booth. During heating, an abnormally high pressure rise is possible, which can lead to damage to the units and rupture of the lines of the refrigeration unit. Heating the car in the painting booth is permissible only after removing the freon from the refrigerator.

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7. To ensure normal operation of the system, the refrigerator is recommended to be switched on at least 1 time per month for 5-10 minutes. This will ensure the distribution of oil throughout the system and increase the service life of the seals in the freon wires.

Even in winter and with prolonged downtime !!!

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8. The system of the refrigerated truck is semi-hermetic !!! as a result, there is a constant loss of refrigerant (even if the system is not in operation).

Remember that there is a 10% reduction in refrigerant in the system annually.

And this is the norm !!!

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9. Lack of refrigerant significantly disrupts the operation of the unit. First, there is a deterioration in the quality of cooling, then the equipment stops functioning. Under normal operating conditions, freon evaporates gradually at a slow rate. Its first replacement is required after 40,000 km or 12 months after the installation of the system. When the refrigeration circuit is depressurized, refueling refrigerators with freon is urgently needed.

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10. If there is not enough gas in the refrigeration system, the required pressures will not be created, this will affect the performance of the refrigerator. Freon itself, over time, as many think, does not go anywhere, the system is cyclical and is a closed loop. If it turns out on the ref diagnostics that there is not enough gas or it is completely absent, they talk about a freon leak. The trained eye of our specialist will detect such a more or less serious problem immediately.

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11. Freon leak gives out itself as an oil spot in this place. If it cannot be detected due to its size, the refrigerator is refueled with an ultraviolet marker for further troubleshooting.
It happens that the ref is not used for a long time, for example, during a long repair on another part of the car. In this case, some of the freon can escape through the rubber O-rings.

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12. The pressure in the system is monitored by a pressure sensor, one or more, which is on each refrigeration unit. In the normal state, the sensor is closed, when the pressure in the system drops, the sensor opens and the ref turns off with an error Prl, AL, 04, 03, etc., depending on the refrigerator model and the installed controller.

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13. The main lines are usually rubber hoses, with a Teflon coating on the inside. One hose goes under high pressure from the compressor, the other under low pressure to the compressor. The hose can rub against the clamp, the body frame, against the booth, with each other ... Sometimes the crimping on the delivery line cannot withstand, and freon with oil comes out directly from under the fitting. After eliminating the refrigerant leak, it is necessary to eliminate its cause.

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14. The condenser of a refrigerator is most often damaged, because it is located on the street, in the direction of the vehicle. He takes on all the dirt, salt, reagents, dust. Since many neglect the regular flushing of the radiator of the refrigeration unit, the heat exchanger begins to deteriorate and rot. Radiators from Zanotti of the Zero, 20S, 25S series are generally aluminum and their service life is much shorter, especially in the realities of our winter.
The evaporator unit usually suffers mechanical damage from the pallets during loading.

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15. While it may seem like a small thing, uncapped filling ports on fittings can cause this kind of trouble. The spool itself is a bicycle-like nipple with a special O-ring in the middle. So, from the influences of the external environment, this ring may dry out, or the nipple itself may be damaged, and all the freon will leave the system, the ref will stop turning on.

In the meantime, there is no need to know about it. ”

16. Most berries, fruits or vegetables have their own nuances of transportation. For example, ripe bananas are not transported. Strawberry-raspberry berries can be transported at a temperature of 1-2 ° C for no longer than three days. The same applies to cherries and cherries. And it is not recommended to transport such cargo as currants for more than a day.
Apricots, peaches, gooseberries, blueberries are loaded at +3 ° С, and during transportation, the temperature of the refrigerator can be lowered to 0 ° С. Apples, pears,
grapes, plums, tangerines, types of cabbage, greens, red tomatoes, beans, carrots require a loading temperature of about +8 ° C. And the range is +1 -
+8 will help deliver them to their destination. Oranges will feel comfortable both at +10 ° C and at +4
° C. And the tomatoes are pink, and brown tomatoes are very fond of heat, so the temperature range from +15 ° С to +8 ° С is suitable
them.
Need to know! Fruits give off a lot of moisture. In addition to possible spoilage from debate, this contributes to drying out. To avoid this, fruits are often treated with antiseptics, which prevents the growth of mold, and also makes it possible to retain a lot of moisture for the cargo.

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17. The temperature of milk transportation is from 4 to 6 degrees, depending on the distance. But this does not apply to
pasteurized milk. For him, the ideal would be 8 ° C. Refrigerated transport of milk for more than 12 hours is not allowed. The butter is loaded and
transported at a temperature of -6 ° С, cheeses - not higher than +8 ° С. When transporting dairy goods, the decisive value will be
indicates the manufacturer himself directly in the documents.

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18. Frozen foods. It is clear to everyone that they must be transported at sub-zero temperatures. But! Depending on the season, cargo for transportation in a refrigerator is accepted with different loading conditions.
For example: in frosty winter, frost must be loaded at -10 ° С, and transported at temperatures from -12 ° С and below.

in autumn and spring: if "overboard" is below 0 ° C, the temperature parameters for the cargo are the same as in winter. In case of positive values ​​on the thermometer, the cargo must be pre-frozen to -12 ° C before transportation.

in summer, of course, conditions are tougher. Freeze, especially fish, at a temperature of -16 ° C and below.

There are, of course, exceptions. Ice cream and frozen fruits and berries should always be loaded at temperatures no higher than -18 ° C.

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19 Perishable goods
Sausages are transported separately from the rest of the cargo, they must preserve the flavor
Cooked sausages should not be on the way for more than a day. The permissible temperature in the refrigerator is from 0 ° C to +6 ° C. Smoked and semi-smoked products love the temperature range from 0 ° C to -3 ° C. And raw smoked sausages may well reach the buyer at + 10 ° С.

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20.Dangerous goods for refrigerated transport
For some drugs, even the slightest temperature jumps are fatal. Use additional refrigerators
Transporting medicines is one of the most challenging tasks for drivers, as many vehicles must be transported within very narrow temperature ranges. The slightest deviation can lead not only to damage to the goods, but, subsequently, to the loss of the patient's health or even death. This is especially true for the transportation of sera, vaccines.
In addition to temperature, increased requirements for the transportation of drugs are imposed on sanitization inside the body, accuracy of loading, so as not to damage the packaging.
It's important to know! When transporting narcotic and psychotropic drugs, a mandatory sealing of the truck is used. If the cargo is "especially dangerous", it must be accompanied by security.

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21. This is interesting! One of the most breakable parts of a refrigeration unit is the refrigerator cover, a protective casing to which the condenser fans are attached. They often break down from the driver's carelessness: they hit it, forget to fix it, and even lose it.

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In the meantime, there is no need to know about it. ”

In the meantime, there is no need to know about it. ”