The operation flow of the compressor is for replacing the steam water vending machine
1. The basic process
This is the basic procedure for replacing a compressor
1. 1. Unplug the power source
2. Discharge refrigerant
3. Disconnect the compressor’s housing leads
4. Take off the exhaust pipe and suction pipe during hot work
5. Take the compressor off
6. 6. Install the damping pad
7. 7. Install the compressor.
8. Connector pipe that is welded
9. Connecting nuts and wires
10. Leak detection and filling of refrigerant
11. Install the housing
12. 12.
2. Work on preparation
1. Disconnect the power supply
Since the connecting wire on the terminal that connects to be removed for the replacement of the compressor, the power supply of the AC unit must be shut off prior to the replacement. The air conditioner that is powered by the power plug should be removed from the circuit breaker, and the one powered by the circuit breaker should be removed by pushing down the button.
2. Discharge refrigerant
When replacing the compressor it is necessary to use a torch for welding to join the suction pipe and the exhaust pipe orifice. The refrigerant in the system (R22 or R410A) produces toxic gas when encountering high-temperature open fire thus the refrigerant contained in the system should be vented.
In operation, the wrench is used to loosen the thin pipe nut that is part of the outdoor unit, as shown in the following figure. The refrigerant that is in the system comes out from the nut. Once the gas has been discharged for a while, the nut on the thin pipe that connects the outdoor unit to the pipe connecting it is taken off. This allows the system to release all refrigerant.
3. 3.Remove the leads from the compressor and housing.
1) . Utilizing a cross-screw screwdriver take off the screws fixing the top cover as well as for the front cover of your outdoor unit.
2) At this time it is evident that there is thermal insulation cotton (felt) outside the compressor. After you locate the fixed line, remove the thermal insulation cotton.
3. Because the compressor foot screw is located inside the rear side cover, the back side cover should also be removed. Remove the fixed nut on the compressor wiring cover with an 8mm screwdriver or pointed nose pliers and then take off the wiring cover and the nut at a time.
4.) Make photos with your mobile phone’s camera to note down the lead role for each wire terminal. After you have installed the compressor that you purchased, make use of pointed nose pliers for the removal of three wire leads. Also, take out the top gasket for the cover of wiring.
3. 3.Remove the compressor
1. Remove the exhaust pipe and suction pipe during hot work
1.) It’s used for connecting the port of the outdoor unit’s two-way valve. If there is no sign of gas it indicates that the refrigerant used in the outdoor unit is fully released.
2) 2. Heat the exhaust pipe orifice by using the torch for welding. When you see that the pipe’s orifice is glowing red, and the solder at the welding joint starts to flow, secure the copper pipe that connects it with pliers. Lift it up and pull the pipe out of the exhaust pipe. 3. Apply the same technique to pull the pipe that connects you from the suction tube that is used to pump the compressor.
4.) Once you’ve removed the suction and exhaust pipes from the compressor, heat them with the welding torch. The solder’s surface will begin to melt completely before flowing down until it is dry.
5) After the pipe orifice area of the connecting pipe is smooth and smooth, pull the pipe to separate it from the suction pipe orifice as well as exhaust pipe orifices in the compressor, to avoid the reconnection due to high temperature.
2. 2. Removing the compressor
The compressor is secured at the bottom of the outdoor unit using three feet. It is secured by 3 nuts , each with an outer diameter 14mm.
Utilize a fixed wrench to remove the nut that is on the outside, and then remove the 2nd nut in the rear side cover, and finally remove the 3 nuts (dotted line location), which is located at the innermost position; In general, it is required to move or remove the diaphragm that connects the outdoor and compressor prior to tightening the nut using an abrasive until it’s removed.
After removing the three fixing nuts the temperature of the pipe connecting to it and the orifice pipe of the compressor will gradually drop to a normal temperature. Observe the outdoor unit system, paying attention to the direction and the contents of the compressor’s liquid storage container to determine the best location to put the new compressor.
If you are able to open or move any pipeline that could affect the removal of the compressor, hold the outside of the compressor in both hands and raise it up, separating the foot from the outdoor unit base, and take out the compressor.
4. Install the compressor
1. Install the damping pad
Take off the three rubber pads on the feet of the previous compressor and put them on the feet of the new compressor.
2. 2. Stationary compressor
Remove the plastic sealing plugs of the suction pipe as well as exhaust pipe of the new compressor, remember the fixing procedure of the older compressor, grasp the shell by both hands, and install the three feet of the compressor onto the three rods that fix the outdoor unit base.
3. Welding pipeline
Find the connection pipe, place the pipe that is thick into the suction pipe orifice in the compressor, and insert the thin pipe into the orifices of the exhaust pipe. The pipe’s original trace will be utilized to measure the depth of installation. The pipe has to remain in its natural condition after insertion. External force can’t be used to secure it. Otherwise the pipe will move when welding the pipe orifice.
A welding torch should be employed to join the pipes of the compressor exhaust pipe and suction pipe at the same time. The pipe orifice must be heated to darken its color. After that, the welding rod is utilized to seal the pipe.
4. 4. Install the retain nuts
In this moment, the temperature of the compressor’s nozzle has reached a high and therefore cannot be utilized directly for leak detection. In the meantime it is possible for the fixed nut to be placed in order to wait for the nozzle temperature to drop naturally. Three foot nuts are able to be installed to follow.
The nut isn’t required to be tightened using an instrument during maintenance. It is used to tighten it slowly by using a wrench following tightening.
5. Install the connecting cable
The steps of installing the connecting line are essential. If the connecting line is inserted incorrectly then the compressor won’t start and operate normally. If the compressor is of a different model is used, measure the resistance of three terminals using an oscilloscope to determine the function of the terminal and then connect three connecting wires.
5. Work is done
1. Leak detection
To eliminate all air out of the system use refrigerant R22 headspace. Install the outdoor unit’s thin pipe nut and tighten it using the wrench. In the end, add 0.7MPa static refrigerant into the system to allow leak detection.
Make use of the soapy detergent to wash a towel. Apply the foam to the exhaust port of the compressor and suction ports. Check for bubbles in the weld parts to check for a hole in the sand. This will determine whether the leakage of refrigerant normal. If there is bubbles, it’s essential to let the refrigerant out to re-weld the joint until the leak is resolved.
2. Install the cover for the wiring
The wiring cover should be installed over the welding point on the exhaust pipe orifice.
3. 3. Install the housing
Install the insulation cotton on the exterior of the compressor, install the side cover on the rear along with the front side and upper top cover after which tighten all fixing screws, then start the air conditioner over again, charge the refrigerant to normal pressure, then complete the replacement of the compressor after the cooling or heating of the air conditioner has returned to normal.