English

Electric load is the most important part of a refrigeration and ventilation systems because these components perform various tasks in the system actuation. The electric motor operates the compressor refrigeration, raising the pressure and circulating refrigerant at any time. Figure 2.1 shows a typical hermetic compressors are commonly used in HVAC units. The electric motor is used to drive the ...

Electrical circuit in an electrical power distribution structure is designed to operate at a certain current level as necessary. Every electrical circuit must be protected or gets protection, appropriate regulatory standards applicable locally, nationally, and internationally. Cable or conductor of each branch circuit protection must be to prevent the flow of current is greater than a predefined size. Electrical components ...

Safety becomes an important factor in the work environment in general and specifically the work of installation and maintenance of refrigeration equipment and air system. Safety in the workplace referred to in this session included two terms of safety personnel and safety apparatus. We know that the refrigeration equipment and procedures udaradapat operate fine when you get supply electrical energy ...

Often we think that the danger of electric shock can only be caused by a high voltage circuit. this is not true. Many cases of occupational accidents electric shock, which is fatal to until death caused by low voltage of 120 volts. If among us ever electric shock but safe did not have a bad result, the incident should not ...

a. Thermostat Thermostat is a device temperature control cabinet or room temperature that works automatically. This tool will decide the motor compressor (cut off) from the grid voltage, if the room temperature has been mencapa preset value and will connect the compressor motor to the grid voltage (restart), if the room temperature is above the desired niai. Temperature cut-off can ...

With the growing complexity of refrigeration and ventilation systems today, the technician / mechanic should be able to read and interpret all types of electrical diagrams. Electrical diagrams contain valuable information about electrical installation and operation of electrical equipment. The mechanic who installed an electrical equipment eg HVAC equipment is highly dependent on the wiring diagram that is issued by ...