The suction and discharge pressures of an air conditioning system can vary based on various factors such as the specific model of the AC unit, operating conditions, and the characteristics of the refrigerant being used. However, I can provide you with a general range of suction and discharge pressures typically observed in air conditioning systems that use R22 refrigerant.
For a 1.5-ton air conditioning system using R22 refrigerant, the suction pressure typically ranges from about 60 to 70 psi (pounds per square inch) or approximately 4 to 5 bar. The discharge pressure, on the other hand, typically ranges from about 220 to 250 psi or approximately 15 to 17 bar.
Please note that these pressure ranges are approximate and can vary depending on factors such as the specific design and efficiency of the AC unit, as well as the ambient temperature and humidity conditions during operation. It is always recommended to consult the manufacturer's specifications or a certified HVAC technician for precise pressure readings and to ensure the system is operating within safe and optimal parameters.