Usually connecting an air conditioning compressor, but the operation itself is simple, and can be performed by the owner of the climate equipment. Provided that he knows and understands the design of the device. The compressor is located in the outdoor unit of the split system. Let’s consider what other mechanisms are in this module, and how they are located.
Scheme of the refrigeration circuit of the external unit of the split system
- Compressor. Compressor. It works with the refrigerant, it compresses the freon and circulates it through the system.
- heat exchanger. Heat exchanger. There are two of these devices in the system: one is for the external unit, in it the refrigerant is cooled to a temperature below the condensation point, the other is for the indoor unit, this is an evaporator, where the working fluid evaporates and gives off temperature.
- 2 way valve. 2‑way expansion valve with two positions: closed and open.
- 3 way valve. Thermoregulatory 3‑way valve, it is a service port, hoses are connected to it when filling with freon or measuring pressure in the system.
- 4 way valve. Expansion valve 4‑way, which provides reverse movement of the refrigerant in heating mode.
- strainer. A filter that prevents moisture from entering a thin channel, since it can clog it and make it inaccessible to the working environment.
- Muffler. This is a muffler.
The solid arrow of the diagram shows in cooling mode, the dotted arrow shows in heating mode. In more complex air conditioners, in addition to the mechanisms described above, oil separators, pressure sensors, a compressor injection device, liquid freon separators and restart lines can be installed.
Electrical diagram of the outdoor module
- Terminal. Terminal box, where N is neutral, 2 is power to the compressor, 3 is power to the motor for 1st speed running, 4 is power to motor0 for 2nd speed running, 5 is power to the 4‑way valve for heating.
- Compressor. C — common terminal of the windings, R — working winding, S — starting winding, IOP — overload protection, CC — working capacitor.
- fanmotor. Fan motor with overtemperature protection (TP) and capacitor (FMC).
- S.V. A solenoid valve that actuates a 4‑way valve.
Ask an expert
Step-by-step instructions for connecting the air conditioning compressor
When you have an air conditioning compressor connection diagram in front of you, you can proceed to the procedure. But there is one more prerequisite: you can change the compressor only to the unit that is recommended by the manufacturer.
- from refrigeration and electrical circuits;
- installation of a new unit;
- replacement of the filter-drier;
- sealing the unit with a vacuum pump and other equipment;
- filling the system with freon;
- testing of climatic equipment in all modes.
Typical installation errors
Common mistakes that non-professionals make are the following:
- failure to vacuumize or carry out the procedure incorrectly, the consequence of such actions will be: the presence of water vapor in the freon line, high condensation pressure, and then a breakdown in the engine insulation;
- violation of installation rules, including tube creases, non-observance of slope angles, long routes, etc., because of this, the compressor lubrication system fails;
- poor-quality connection of connections of freon routes;
- the ingress of foreign matter into the lines.
If you avoid these errors, you can count on the performance and efficiency of the split system. But, if you are unsure of your knowledge, it is better to entrust the work to professional masters of the service department of the climate technology brand.