When designing residential premises, developing kitchen units or drawing up electrical diagrams of household networks, it is extremely important to correctly identify large household appliances. The question of how a refrigerator is indicated in a drawing often confuses not only novice designers, but also experienced craftsmen who are faced with documentation from different years. Conventional graphic images allow specialists from different countries and fields of activity to understand each other without further ado, using a single coding system.
Depending on the type of drawing - be it an architectural plan of an apartment, a schematic electrical diagram or an assembly drawing of the unit itself - the symbolism can be radically different. In one case it will be a simple rectangle indicating the dimensions, in the other - a complex combination of geometric shapes indicating the type of compressor or refrigerant. Understanding these nuances is necessary for competent installationconnection and further maintenance of equipment.
In this article we will analyze in detail all existing marking standards, pay attention to the differences between domestic GOSTs and international ISO standards, and also learn how to read complex engineering diagrams. You will learn how the designation of a two-chamber model differs from a single-chamber model and how not to confuse the symbol of a refrigerator with a freezer on the power supply plan.
Standards of graphic designation in architecture and planning
In architectural and construction documentation, such as evacuation plans, explications of premises or design projects, household appliances are displayed as simplified as possible. The internal technical characteristics are not important here, the main thing is the space occupied and the location relative to the walls and communications. Most often refrigerator on the plan it is a rectangle, inscribed in the contour of a kitchen unit or standing alone.
For built-in appliances, a specific shading or dotted line is used, indicating that the device is hidden behind the facade of the furniture. Freestanding models may have more detail, sometimes with the door ajar to show the direction of opening. This is critical for the ergonomics of the kitchen, so that the doors of adjacent cabinets do not block access to products.
There are several key rules for reading such plans that will help you avoid mistakes when ordering furniture:
- 📐 A solid bold line usually indicates the visible outline of the body protruding beyond the furniture.
- 🔲 The dotted line inside the outline of the kitchen indicates a built-in model hidden behind the decorative panels.
- 🚪 An arrow or arc near the rectangle shows the trajectory of the door opening, which is important for accessibility.
- 🌡️ Sometimes the letter index “X” or “F” is placed next to the symbol, which means, respectively, a refrigerator or freezer.
It is worth noting that modern design projects often use photorealistic renderings, where symbols are replaced by 3D models. However, the working documentation for builders and installers still requires clear drawing symbolscompliance with ESKD (Unified System of Design Documentation) standards.
Electrical diagrams and basic designations
When it comes to connecting equipment to the network or repairing electrical wiring, completely different rules come into force. On principal electrical diagrams a refrigerator is designated not as a furniture object, but as a consumer of electricity with certain characteristics. What is important here is the power, type of motor and the presence of additional devices, such as defrost heating elements or No Frost fans.
In accordance with GOST 2.702-2011 and more specialized standards of the 2.7 series, the compressor (the main unit of the refrigerator) is often depicted as a circle with an inscribed triangle or letter code. For domestic needs, a simplified designation in the form of a rectangle with a signature or a specific symbol, depending on the type of engine, is most often used.
The main elements that can be found on the electrical circuit of refrigeration equipment:
- ⚡ Compressor: indicated by a circle with the letter "M" (motor) or a specific piston symbol mechanism.
- 🔥 Heating element (heating element): depicted as a rectangle with a wavy line inside or two arcs.
- ❄️ Fan: a circle with inscribed blades, indicating a forced air circulation system.
- 🛡️ Thermal relay: a rectangle with the letter “F” or “K” that protects the motor from overloads.
Particular attention should be paid single-line diagrams panel panels, where the refrigerator can be presented simply as a load indicating the power consumption in kilowatts. In such cases, it is important to select the correct cable cross-section and circuit breaker rating to avoid network overload when starting the compressor.
Why are two compressors sometimes drawn on diagrams?
Two-compressor refrigerators have independent cooling circuits for the refrigeration and freezer sections cameras In the diagram this is shown as two separate compressor blocks, each with its own protective automatics.
When reading such diagrams For example, in Soviet diagrams there were only graphic symbols, while modern imported equipment is marked according to IEC standards.
Specific designations in engineering systems and plumbing
A refrigerator rarely appears in water supply and sewerage systems, with the exception of models with a water supply connection for ice makers or water dispensers. In such cases, an additional line appears, supplying cold water to the point of consumption. The designation of the water intake point itself is standard - a small circle or square with a tap. engineering drawings an additional line appears that supplies cold water to the point of consumption. The designation of the water collection point itself is standard - a small circle or square with a tap.
If we consider industrial-scale refrigeration equipment or central air conditioning systems where refrigeration machines are used, the symbolism becomes much more complex. Special symbols are used here to designate condensers, evaporators, throttle valves and receivers. Each element has its own unique graphic code.
For a household user planning to supply water to the refrigerator, it is important to understand the following markers on the plumbing plan:
- 💧 Blue line: indicates the cold water supply pipe going to the equipment.
- 🚿 Connection point: often marked with the letters "XV" (cold water) indicating the thread diameter.
- 🚫 Shut-off valves: the diagram must show a tap for shutting off the water in front of the refrigerator.
⚠️ Attention: When laying the water supply to the refrigerator, use only food-grade hose materials (PEX, polypropylene with certificate). Technical hoses can change the taste of water and ice, making them unsuitable for consumption.
The heat transfer zone of the refrigerator may also be indicated on the ventilation engineering plans. Since the compressor heats up during operation, special ventilation ducts or grilles are often provided in niches for built-in equipment, which also have their own symbols on the drawings.
Table of graphic symbols (GOST and ISO)
To systematize knowledge and quickly find information, below is a summary table that helps you understand how the refrigerator and its components are designated on various types of documentation. This data is based on current standards, but may have variations depending on the specific project.
| Element / Object | Drawing type | Graphic designation (description) | Standard |
|---|---|---|---|
| Household refrigerator | Architectural plan | Rectangle, sometimes with a door opening arc | GOST 21.501 |
| Built-in refrigerator | Furniture plan | Dotted rectangle inside the cabinet outline | ESKD |
| Compressor | Electrical diagram | Circle with the letter M or triangle | GOST 2.722 |
| Evaporator | Scheme refrigeration systems | Zigzag line or tube in section | GOST 2.769 |
| Water collection point | Plumbing plan | Small circle with outlet and tap | GOST 21.205 |
Using this table allows you to quickly identify the necessary elements when working with project documentation. However, it is worth remembering that in author’s drawings, designers can deviate from strict standards for the sake of visual clarity by adding pictograms.
Differences between built-in and free-standing equipment in plans
One of the most common questions when reading kitchen plans is how to distinguish a built-in refrigerator from a free-standing one. At first glance, this may seem obvious, but in a flat drawing at a scale of 1:50 or 1:100, the details are lost. The main difference lies in the contour lines and the presence of additional elements.
Free-standing models are depicted as an independent volume. Free space is often left around such a rectangle, indicating a technological gap for ventilation. On the facade of such a symbol, handles or a display can be depicted, which immediately indicates the type of device.
In the case of built-in appliances, the refrigerator symbol fits completely into the dimensions of the kitchen cabinet-column. The refrigerator door in such diagrams is often not shown at all, since it is hidden behind the facade of the furniture. Instead, the emphasis is on the base and ventilation grille in the lower or upper part of the niche.
☑️ Checking the drawing before installing the kitchen
It is important to pay attention to the height of the symbol. The standard height of a built-in refrigerator is often a multiple of the height of the kitchen modules (for example, 60 cm, 120 cm, 180 cm), while free-standing models may have non-standard sizes that stand out from the overall grid of the unit.
⚠️ Attention: Never ignore the designation of ventilation ducts on the drawing of the built-in kitchen. The lack of air inflow and outflow in the niche will lead to overheating of the compressor and failure of the refrigerator during the warranty period.
Reading diagrams for repair and maintenance
For repairmen, knowing how the refrigerator is indicated on the drawing is a key skill. The service documentation (service manual) contains detailed electrical and refrigeration diagrams necessary for troubleshooting. Here, international standards for the designation of radio components and elements of the refrigeration system are used.
When searching for a malfunction, for example, in the system No Frost, the technician looks for a fan and a defrost sensor in the diagram. They may be designated by codes such as "FAN" and "DEFROST SENSOR" respectively, accompanied by graphic symbols. Understanding the connection between these elements in the diagram allows you to quickly localize an open circuit or failure of a component.
Main stages of working with the circuit during repair:
- 🔍 Identification of the node: we find in the diagram the block corresponding to the problem node (compressor, light, control).
- ⚡ Check circuits: we track the path of electric current from the plug to a specific element.
- 📏 Comparison of ratings: we compare the designations of parts (resistors, capacitors) with their real values.
Modern refrigerators are equipped with complex electronic control modules. In drawings they are often presented in the form of a rectangular block ("black box") with a list of connector pins. A detailed internal diagram of such a unit is usually not provided, since it is considered a non-repairable unit and must be replaced entirely.
Where can I find a diagram for my model?
Official service diagrams (with electrical ratings) are rarely published in open sources. They can be found in specialized databases for repairmen or requested from an official representative of the brand using the VIN code of the device.
Frequently asked questions (FAQ)
What is the difference between the designation of a refrigerator and a freezer on the drawing?
On architectural plans, the difference is often indicated by letter markings: "X" for refrigerator and "M" or "F" (freezer) for freezer. Graphically, the freezer can be depicted with thicker contour lines, symbolizing reinforced insulation, or with a shaded interior space.
Is it necessary to comply with GOST when creating a kitchen plan for yourself?
For personal use, strict compliance with GOST is not mandatory, the main thing is the clarity of the drawing for you and the performers of the work. However, the use of generally accepted standards minimizes the risk of misunderstanding with furniture measurers and assemblers.
How is a two-chamber refrigerator with one compressor indicated on the diagram?
On the electrical diagram, this will be one symbol of a compressor, from which there are branches to two evaporators (or one common one) with a valve system. On an architectural plan, this is a single rectangle, often divided by a horizontal line showing the boundary of the chambers.
What does the dotted line around the refrigerator rectangle mean?
The dotted line usually indicates an invisible outline. In the case of a refrigerator, this may mean either built-in equipment (the outline is hidden by furniture), or a door opening area, or a projection of the above-located elements (for example, upper cabinets) onto the floor plan.
Is it possible to use symbols from old Soviet drawings now?
They can be used if all participants in the process (customer, designer, builder) understand this system. However, to avoid mistakes when purchasing modern equipment, it is better to focus on current standards or international analogues, since the dimensions and requirements for ventilation have changed.