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Here are the steps to properly charge a 410a AC system: Turn on the air conditioner. Connect the gauges. Measure the system’s pressures and temperatures. Calculate the target subcooling and superheat. Add refrigerant. Monitor the subcooling and superheat. Disconnect the gauges. Check the system’s performance.
system charge chart - refrigerant 410a pressure at suction service port (psig) connect pressure gauges to suction and liquid ports on unit. measure air temperature to outdoor coil. place an "x" on the appropriate chart where the suction and liquid pressures cross. if "x" is below ambient temperature line, add charge and repeat step 3.
A typical R-410A refrigerant pressure/temperature chart will give refrigerant pressures at various (ambient) temperatures ranging from below freezing to over 160 °F. Following the R410A pressure examples in our table you'll find free PDF downloads of detailed R410 refrigerant pressure charts.
In this article, we will discuss an HVAC unit’s refrigerant pressure on both the high side and the low-pressure side while the system runs. It is important to know the range of these pressures in order to understand why and how charging and recovery are performed.
Refrigerant R-410A Pressure Temperature Chart - This R410A PT Chart will help you when charging a system that utilizes R-410A. Furthermore, R410A is an HFC and is commonly used in residential and light commercial HVAC equipment for air conditioners and heat pump systems.
These units use R-410A refrigerant which operates at 50 to 70% higher pressures than R-22. Use only R-410A approved service equipment. Refrigerant cylinders are painted a “Rose” color to indicate the type of refrigerant and may contain a “dip” tube to allow for charging of liquid refrigerant into the sys-tem.
Use a pressure conversion chart to change the high side pressure to saturated temperature. Deduct the liquid-line temperature from the saturation temperature of R-410A refrigerant in the condenser to compute the sub-cooling value.
SYSTEM CHARGE CHART - REFRIGERANT 410A. HEATING BASIC SYSTEM CHARGE WITH 0 FEET OF TUBING = 372 OZ. DESIGN SUBCOOLING @ 47 ̊F AMBIENT = 25 ̊F (AT SERVICE VALVE) ADD ADDITIONAL AMOUNT AS SHOWN IN TABLE BELOW.
The R410A PT chart can be used to answer questions like: What are normal operating pressures for 410A? What is the pressure of r410a at 72 degrees Fahrenheit? What should gauge read for 410A? You can also use the R-410A PT chart to adequately calculate the superheat, total superheat, and subcooling temperatures.
92-102273-04 Rev. 01 RQNM-A042, RQPM-A042 R-410A Packaged Heat Pump Charging Chart. 550.