Disassemble the device shell
First disassemble the casing of the unit. Of course, it is not necessary to disassemble all the casings. We only disassemble the parts and find the refrigerant filling port. If the filling port is on the equipment casing (obviously you can see it) Place), there is no need to disassemble the unit shell.
How to add refrigerant to small central air conditioner
Check the pressure gauge and connect the pipe
Check whether the R410 refrigerant tube is reset to zero, check whether there is a crack or aging phenomenon in the refrigerant filling pipe, and replace it immediately if any problem is found. Connect the yellow tube in the middle of the pressure gauge to the refrigerant bottle, close the valve corresponding to the red tube on the right side of the pressure gauge, and open the valve of the blue tube on the left.
How to add refrigerant to small central air conditioner
How to add refrigerant to small central air conditioner
Air exhaust parallel pipe
Open the valve on the refrigerant bottle a little bit and feel a little cool air coming out of the blue tube, indicating that the air in the tube has been drained, and connect the blue tube to the refrigerant filling port. At this time, it is best to cooperate with two hands, one hand holding the blue tube close to the nut, and the other hand twisting the connecting nut on the tube.
How to add refrigerant to small central air conditioner
Refill refrigerant
After all the above work is done, the refrigerant can be filled. Open the valve on the refrigerant tank to the maximum, start the unit and observe the pressure change of the pressure gauge.
How to add refrigerant to small central air conditioner
Dismantle
When the pressure on the pressure gauge is consistent with the pressure on the low pressure side indicated in the manual, it means that the filling volume is enough. At this time, first close the valve on the refrigerant tank, then close the valve on the blue tube, and finally remove the connection with both hands. Screw on the blue tube on the filler port.
How to add refrigerant to small central air conditioner
Restore
Install all the disassembled unit shells. Remove the yellow tube connected to the refrigerant tank, pack up the tools, and complete the filling.
