YILKAR YK 300, Installation Instruction, Page: 8 / 42

2. Definition and Technical Information
YK 300 is an innovative designed roof top air conditioner developed for air conditioning 9
mt buses.
The unit, which is easy to install, includes a condenser and two evaporators, right and
left. These units need to be mounted on the roof of the vehicle and connected to the
compressor via hoses with R134a refrigerant circulation.
With its aerodynamic design, this unit only increases the height of the vehicle by 27 cm.
Thus, thanks to its design, resistance in air and fuel consumption is minimized.
It can operate in outdoor conditions at 45°. The air conditioner, which has a cooling
capacity of 20-30 kW, can have a heating function by joining the heat exchanger device.
Your air conditioner can use the waste heat generated in your vehicle's engine and can
provide heating power to your air conditioner with its current design. In this way, the
cooling of your engine is more effective, while your vehicle warms up.
YK 300 is universal, compact and economical with all its features.
2.1 What is YK 300 ?
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2.2 How does it work?
Vehicle roof air conditioners are heat machines that provide passenger thermal comfort
by taking the heat inside the vehicle.
Vehicle roof air conditioners work with a vapor compression refrigeration cycle in
thermodynamics. There are 4 main parts in this cycle. These are the compressor,
condenser, evaporator and expander valve.
The refrigerant put into the heat machine is first pressurized in the compressor, and the
fluid pressure is increased from approximately 1 bar to 16 bar. Afterwards, the
temperature of the supercompressed and superheated gas in the condenser is taken and
the fluid is liquefied under extreme pressure. The high pressure liquefied fluid coming to
the expansion valve from here passes through the valve to the low pressure region and
evaporates. It needs heat during evaporation. While the ambient air passed over the
evaporator heats the fluid in the evaporator and causes it to evaporate, it cools the
environment and provides thermal comfort to the passenger cabin.
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