VRF & VRV Systems Services

1. 1. Georgian legislation:

• Law of Georgia Environmental Protection
• Law of Georgia ,,On Ambient Air Protection";
• Law of Georgia ,,Code of Administrative Offenses of Georgia&quot'';
• Resolution of the Government of Georgia No. 304;
• Georgian Standard SST 70-2013: "Requirements for the safety and environmental protection of refrigeration systems and heat pumps"
• Monreal Protocol "About ozone depleting substances";
• The association agreement, on the one hand, Georgia, on the other hand, membership of the European Union and the European Atomic Energy Union between the states
• Annex XXVII - Climate Action
• Law on Energy Efficiency

1. 2. Basics of air conditioning

• purpose of air conditioning;
• Comfortable conditions for a person's thermal sensation;
• Human thermal balance;
• Calculation parameters of indoor air;
• Environmental climate characteristics and reporting parameters;

1. 3. Heat flow and heat loss

• Basic principles.

1. 4. Review and analysis of a typical project of heating-conditioning and ventilation systems of buildings :

• Project solutions;
• Conventional Signs;

1. 2.1. Basics of air conditioning

• Energy and forms of energy;
• N1 law of thermodynamics;
• N2 law of thermodynamics;
• Energy transfer (heat, work);
• Heat transfer: conduction, radiation, convection;
• Aggregate state of matter: solid, liquid and gas;
• Mass and weight;
• Heat capacity, heat capacity;
• Latent and sensitive heat;
• System and system properties;
• Temperature, absolute temperature
• Atmospheric pressure, manometric pressure

1. 2.2 Refrigerator cars and hot pumps Main components:

• Compressor, condenser, evaporator, throttle (EXV, TXV, Capillary tube); receiver; Electronic control boards.
• Purpose and principle of operation of the main parts

1. 2.3 Principles of operation of refrigerating machines and heat pumps;

• What is power, its measurement units
• Efficiency
• Process and cycle

1. 2.4 Auxiliary components of refrigerating machines and heat pumps;

• Auxiliary parts: 4-stroke valve, silencer, solenoid valve, liquid separator, electric. Condenser.
• Split type conditioner

1. 2.5 Refrigerants

• Thermodynamic properties of refrigerants;
• Importance of oil use and compatibility with refrigerant;
• Refrigerant collection;
• Refrigerants with ozone depleting and global warming potential;
• Alternative, natural and synthetic refrigerants.

1. 2.6 Air conditioning systems impact on the environment:

• Enthalpy
• Pressure enthalpy diagram
• Reverse carnot cycle
• Isotherma, isobar, isochorda
• Critical point, saturated liquid line, saturated vapor line, superheating zone, supercooling zone

1. 2.7 Air conditioning system:

• Split type air conditioner;
• Multizone air conditioner;
• VRF & VRV two-pipe system
• VRF & VRV three pipe system

1. 3.1 VRF & VRV System:

• " Refrigerant variable flow " and " refrigerant variable Volume " installation norms and conditions of systems;

1. 3.2 A special computing program (VRF Selection Software)

• A special computing program (VRF Selection Software) , drawing up a technical report of the VRF system, in accordance with the design drawing;
• Determination of installation and consumables;

1. 3.3 Confirmation of learning results 1,2,3

1. 3.4 Air conditioning with the installation of systems related risks and threats, methods of reducing them;

1. 4.1 Electricity:

• Protection of labor safety;
• Electrical safety protection and its technical means;
• Fire prevention measures;
• Effect of current value on damage outcome;
• Single-pole and cross-pole contact with current-carrying parts;
• Protective earthing and earthing;
• Safe electricity for human health;
• The cause of the origin of electricity;
• Symbols of principle and architectural drawings, reading of drawings, their interpretation, meaning of electronic parameters of devices;
• Wohr's law, electrical resistance, conductivity, electric circuit, series and parallel connections, mixed connections;
• Electricity energy and power calculation, permissible cross-sections, working tables, working materials;
• Protection systems, automatic machine classification and working principle;
• Circuit switching devices, relay, principle of operation of magnetic starter, circuit diagrams;
• The working principle of variable asynchronous single-phase and three-phase electrical motors, their diagnosis, arrangement of outputs;
• Star and delta connection schemes;
• Working principle of DC motor;
• Rules for using measuring tools ("multimeter");

1. 4.2 Split type air conditioner:

• Installation and commissioning;
• Installation tools;
• Monitoring and regulation of operating parameters;

1. 5,6 Installation of VRF system:

• Placement and installation of outdoor units;
• Placement and installation of internal units;
• Selection-adjustment of copper pipelines and their distributors;
• Insulation of copper pipelines;
• Methods of connecting copper pipelines - welding and "rolling" connection;
• Importance of dry nitrogen in welding;
• Cleaning of copper pipelines with dry nitrogen;
• Checking the tightness of the system;
• Vacuum drying of the system;
• Drainage system;
• Determining the required amount of refrigerant and adding it to the system;
• Electrical Wiring;
• Heating, cooling and oil return cycle;

1. 7.1 VRF System Commissioning:

• Monitoring of operating parameters;
• Compilation of the commissioning report and transfer to the customer;

1. 7.2 Diagnosis of possible malfunctions of the VRF system and methods of their correction:

1. 8.1 Scheduled maintenance of air conditioning systems and related reporting:

1. 8.2 Confirmation of learning outcomes