Specifications
Material: Stainless Steel + Rubber
Color: Blue
Size: Tap: 5.5x7cm
The middle: Low pressure gauge (350PSI)
Hoses: 20+10cm
Features:
-Easy to use and install
-High pressure resistant hoses
-Built-in safety valves to prevent accidental venting of refrigerant
Packing Included:
1 x Tap
1 x Hoses
1 x Low pressure gauge (350PSI)
Notice:
DIY filling and replenishment method for automotive air conditioning refrigerant
Refrigerant replenishment for car air conditioning is just as convenient and safe as tire inflation.
A typical automotive air conditioner typically loses about 10% of its refrigerant annually, which is determined by the sealing method of the automotive air conditioning compressor (which is a semi sealed type). We only need to regularly test and replenish the refrigerant for the car air conditioning every year. Don’t worry about the usage method. Below, I will tell all car enthusiasts the DIY car air conditioning testing supplementary method. Friends can try filling the refrigerant themselves.
The method is as follows:
1. It is necessary to prepare a DIY testing supplement tube for the car air conditioner.
2. One bottle of R134A refrigerant for vehicles
3. Now start testing the pressure on the car: First, rotate the ejector pin in the DIY replenishment tube bottle opener counterclockwise to the top, then screw the refrigerant bottle into the bottle opener and tighten it.
4. Generally, there is a blue or black small hat on the left end of the engine hood, with an L-shaped character on the hat, to locate the low-voltage interface. Unscrew the small hat.
5. Start the car engine and turn on the AC switch of the air conditioning. Turn on the blower to its maximum, run it, and wait for three minutes. Connect the DIY pipe interface to the low-pressure end of the car air conditioner.
After the DIY pipe is connected to the low-pressure interface, the DIY pipe pressure gauge will instantly have a scale indication. At this point, the pressure gauge scale on the DIY pipe is consistent with the pressure of the air conditioning system. By looking at the pressure scale on the pressure gauge, you can determine the pressure in the system. At what pressure does it take to replenish the refrigerant? Here is a knowledge explanation! The pressure in the automotive air conditioning system varies according to changes in external environmental temperature. As shown in the figure below, the Fahrenheit temperature and air conditioning system pressure are compared to confirm the high and low pressure in the system. A high system pressure indicates that there is more refrigerant in the system than normal, and vice versa, refrigerant needs to be replenished. If the external temperature is 30 degrees, the pressure in the air conditioning system should be around 45PSI, and if it is less than 45PSI, refrigerant should be replenished. (Fahrenheit temperature is a commonly used temperature unit in the United States, thank you!)
The pressure of the low-pressure gauge for external environmental temperature (Fahrenheit temperature) is based on the theoretical constant temperature values in the laboratory. During use, the outdoor temperature cannot meet this requirement. So car owners and friends should calculate the minimum value in the chart during use. The calculation method is to subtract 10PSI from the minimum value to calculate the normal system pressure. The pressure should not exceed the minimum value. Once the pressure exceeds, the compressor will automatically protect, and the cooling effect will be very poor! If the external temperature is at 30 degrees, the chart shows 45PSI-55PSI, which is a constant temperature value. When calculating, we should subtract 10PSI pressure from 45PSI, and the result is 35PSI, which is the normal pressure value of the system. It is best not to exceed this value.
Fahrenheit 65 corresponds to 18.33 degrees Celsius system pressure 25-35PSI
70 degrees Fahrenheit corresponds to 21.11 degrees Celsius system pressure 35-40 PSI
Fahrenheit 75 corresponds to 23.89 degrees Celsius system pressure 35-40 PSI
80 Fahrenheit corresponds to 26.67 degrees Celsius system pressure of 40-50 PSI
85 Fahrenheit corresponds to 29.44 degrees Celsius system pressure 45-55PSI
90 degrees Fahrenheit corresponds to 32.22 degrees Celsius system pressure 45-55PSI
95 degrees Fahrenheit corresponds to a system pressure of 50-55PSI at 35 degrees Celsius
100 Fahrenheit corresponds to 37.78 degrees Celsius system pressure 50-55PSI
Fahrenheit 105 corresponds to 40.56 degrees Celsius system pressure 50-55PSI
Fahrenheit 110 corresponds to 43.33 degrees Celsius system pressure 50-55PSI
7. If the pressure in the air conditioning system is low and refrigerant needs to be replenished, rotate the ejector pin in the bottle opener clockwise to pierce the refrigerant bottle opening. The ejector pin in the bottle opener immediately rotates counterclockwise to the top, (Note: At this point, the scale of the pressure gauge will display a maximum of 100PSI to 110PSI. After 2 seconds, the scale of the pressure gauge will slowly decrease and return to the original displayed scale. This is normal because after the bottle is punctured, there is pressure coming out. In these seconds, the pressure in the R134A bottle is displayed. After the pressure in the bottle is absorbed by the compressor, it will be displayed as the pressure in the system!) Gently shake the refrigerant bottle, Refrigerant gas will flow into the system, and at the same time, check the pressure gauge scale. The temperature and pressure PSI units shown in the figure should be one to one. Note: Do not stand the refrigerant bottle upside down!!! (excluding oil mixture)
Note: When the refrigerant bottle is not pierced, there is a little air in the DIY pipe. If the car owner needs to exhaust a little air in the pipe, please follow the following method. When the refrigerant bottle is not pierced, gently loosen the refrigerant bottle and bottle opener a little, and the air in the DIY pipe will be flushed out by the refrigerant in the air conditioning system. At this time, tighten the refrigerant bottle immediately!!!
When the pressure gauge scale is observed to be normal, please immediately rotate the top needle in the bottle opener clockwise to the bottom and tighten it. Remove the low port connector of the air conditioning system. If one bottle is not enough after adding, please add the second bottle of refrigerant according to the above method until the external temperature and system pressure have reached one.
9. At this point, the refrigerant in the car air conditioning system has been replenished. Please tighten the L-shaped cap.
Note: The above pressure scale and filling method are the filling instructions provided by the American refrigerant sales company ID and EF. After completing a successful filling on your own, you will find it as convenient as inflating a car tire
