Many owners household appliances that they inherited or bought on the secondary market, they wonder about the origin of their unit. Pozis refrigerator has a rich history, rooted in the depths of the Soviet defense industry. Understanding what this brand and manufacturing plant used to be called helps to better understand the design of the device and find the necessary spare parts for repairs.
The history of the enterprise is inextricably linked with the city of Zlatoust in the Chelyabinsk region, where a large machine-building complex was located. In different decades, products were released under different abbreviations and names, which often confuses modern users. Let's look at the chronology of renamings and the technical features that distinguish old models from new ones.
Knowing the exact model name and year of manufacture is critical when searching for instructions or diagrams. Soviet technology was famous for its repairability, but the lack of modern standard markings can make diagnosis difficult. In this article we will take a detailed look at the evolution of the brand and the samples that have survived to this day.
Historical background: from plant No. 389 to Pozis
The origins of production go back to 1946, when it was founded in Zlatoust Plant No. 389. Initially, the company was engaged in the production of ammunition and artillery weapons, having nothing to do with household appliances. The transition to civilian footing began much later, during the period of conversion of defense enterprises.
⚠️ Attention: In the technical documentation of USSR times, the plant could be designated by code names or postal code. When searching for archival drawings, keep in mind that the name “Pozis” was not yet in use.In the 1970s, the plant began to master the production of refrigeration equipment. The first models were single-chamber units, which quickly gained popularity due to their reliability. It was during this period that the main backbone of the design bureau was formed, which created the legendary series.
The abbreviation POZIS appeared already in the post-Soviet period, although it has been associated with the plant since the beginning of mass production of refrigerators. It stands for “Production Association of the Zlatoust Machine-Building Plant.” This name has become a brand known far beyond Russia.
📊 What year is your refrigerator?Before 19901990-20002000-2010Newer than 2010What were the names of the first models of refrigerators
The first refrigerators that came off the assembly line of the Zlatoust enterprise did not bear the proud name Pozis. They were marked with an abbreviation ZIL (not to be confused with the Moscow plant) or simply with a number series indicating volume and type. Often the nameplates bore the inscription “Zlatoustmash.”
One of the most famous early series was the model KSh-120. It was a compact, single-compartment refrigerator that became the standard for small kitchens of the time. The design has been simplified as much as possible to ensure high reliability in conditions of unstable voltage.
- 🔹 KSh-120 is a classic single-chamber refrigerator with a freezer on top.
- 🔹 KSh-185 is a more spacious model, which became widespread in the 80s years.
- 🔹 KSh-240 - a large-sized version for large families, characterized by thick walls.
It is important to note that early models often did not have automatic defrosting. The first refrigerators of the Zlatoust plant were equipped with open-type evaporators, which required manual defrosting at least once a month. This distinguished them from later modifications, where they began to introduce the “No Frost” system and drip defrosting.
Technical features of Soviet units
The engineering thought of that time relied on durability and maintainability. Compressorsinstalled on these refrigerators were able to work for decades without changing the oil. However, their energy efficiency left much to be desired by modern standards.
The housings were made of thick sheet steel with high-quality powder coating. Even after 30-40 years of operation, the metal rarely suffered through corrosion. Interior shelves were often made of durable glass or metal with an enamel coating.
An important design element is the coolant. Old models used Freon R-12, which is now prohibited for use due to harm to the ozone layer. When repairing such units, it is necessary to remake the system to modern safe analogues, which requires replacing the oil and filter-drier.
⚠️ Attention: If you plan to fill an old refrigerator with modern freon, make sure that the compatibility of the oil and refrigerant has been checked by a specialist. Mixing different types of oils can damage the compressor.Comparison of characteristics: Then and Now
Comparative analysis shows how the priorities of manufacturers have changed. If previously the main thing was “indestructibility,” today energy efficiency and additional functions come to the fore. Let's look at the main differences in the table.
Characteristics Soviet models (Zlatoustmash) Modern models (Pozis) Energy consumption Class E, F (high) Class A+, A++ Noise level 45-50 dB 35-39 dB Defrost system Manual Drip / No Frost Shelf material Metal, glass Tempered glass, plastic Modern refrigerators Pozis retained the metal body, but acquired an electronic control system. This allows you to more accurately maintain the temperature, but makes repairs more difficult. Electronic modules are sensitive to voltage surges.
Typical problems and their solutions
Despite the legendary reliability, even Soviet technology is aging. The most common problem is freon leak through soldering points or microcracks in the evaporator. In older models, the evaporator was often made of aluminum, which is susceptible to corrosion when in contact with moisture and salts.
Another common malfunction is the failure of the start relay. The symptom is a characteristic click and attempt to start the engine, followed by a hum and shutdown. Replacing the relay is a simple procedure, accessible even to a beginner.
☑️ Diagnosis of the malfunction
Done: 0 / 4If the refrigerator is humming louder than usual, it is worth checking vibration of tubes. Sometimes simply moving the tubes away from each other or away from the housing is enough to eliminate the noise. The compressor may also make noise, requiring replacement of shock-absorbing gaskets.
⚠️ Attention: If you smell burning wiring or melted insulation, immediately disconnect the device from the network. Operation of faulty electrical equipment can lead to a fire.Where to look for spare parts for old models
Finding spare parts for equipment produced 30-40 years ago can become a quest. However, thanks to the unification of many components, the chances of finding the right part are high. Seals, shelves, thermostats and start relays are often suitable from other models of the same period.
To search, use the markings indicated on the metal tag located inside the camera or on the back wall. If the factory name has been erased, rely on the appearance and year of manufacture. Forums for lovers of retro technology can suggest exact analogues.
- 🔸 Thermostats —they are often interchangeable with models from other Soviet factories (Saratov, Minsk).
- 🔸 Compressors —can be replaced with modern analogues, but the tubes will need to be re-welded.
- 🔸 Seals —for older models you often have to order universal ones and customize them locally.
Is it possible to supply a compressor from another brand?
Yes, you can install a modern compressor (for example, Danfoss or Embraco), but this will require replacing the filter-drier, re-welding the copper pipes and refilling with new freon. Old oil and R12 freon are incompatible with new systems.
FAQ: Frequently asked questions
Is it true that Pozis refrigerators used to be part of a defense plant?
Yes, it is true. Production was located at the Zlatoust Machine-Building Plant, which specialized in artillery systems. Refrigerators began to be produced as part of the conversion of military capacities.
What refrigerant was used in older models and can it be replaced?
R-12 freon was used. It is possible to replace it with modern R-134a or R-600a, but it requires a complete flushing of the system, changing the oil to synthetic and installing a new filter-drier.
Why does the old Pozis refrigerator consume a lot of electricity?
Technologies of the 70-80s did not imply high energy efficiency. Thick insulation and powerful, but “gluttonous” motors led to high consumption. Seals also lose their properties over time, causing the motor to work more often.
Where can I find instructions for the KSh-120 model?
Original paper instructions have rarely been preserved. Electronic copies can be found on specialized forums for the repair of household appliances or in the archives of technical documentation of the USSR.