loading

ShIP to

English
news-How to replace the compressor of a soda vending machine-Hommy-img-1
Home  > INFO  > Industry News  >  How to replace the compressor of a soda vending machine

How to replace the compressor of a soda vending machine

2021-09-03

Operation flow of compressor for replacing steam water vending machine


1. Basic process


The basic process of compressor replacement is as follows


1. Disconnect the power supply


2. Discharge refrigerant


3. Remove the housing and compressor leads


4. Remove the exhaust pipe and suction pipe during hot work


5. Remove the compressor


6. Install the damping pad


7. Install the compressor


8. Welded connecting pipe


9. Install nuts and connecting wires


10. Leak detection and refrigerant filling


11. Install the housing


12. Debug


2. Preparatory work


1. Disconnect the power supply


Since the connecting wire on the connecting terminal needs to be removed during the replacement of the compressor, the power supply of the air conditioner shall be disconnected before the replacement. The air conditioner powered by the power plug shall be unplugged, and the air conditioner powered by the circuit breaker shall be disconnected by pulling down the push button.


2. Discharge refrigerant


When replacing the compressor, it is necessary to use a welding torch to weld the suction pipe and exhaust pipe orifice, and the refrigerant in the system (R22 or R410A) will produce toxic gas when encountering high-temperature open fire, so the refrigerant in the system should be vented.


During operation, the loose wrench can be used to loosen the thin pipe nut of the outdoor unit, as shown in the figure below; The refrigerant in the system comes out from the nut. When the gas becomes weak after being discharged for a certain time, remove the nut of the thin pipe to connect the two-way valve of the outdoor unit and the connecting pipe to the outside atmosphere, so as to completely vent the refrigerant in the system.


3. Remove the housing and compressor leads


1) . after removing the fixing screws of the upper top cover and front cover of the outdoor unit with a cross screw screwdriver, remove the upper top cover and front cover of the outdoor unit in turn;


2) At this time, it can be seen that there is thermal insulation cotton (felt) outside the compressor. Remove the thermal insulation cotton after finding the fixed line.


3) . since the compressor foot screw is located in the rear side cover, the rear side cover should also be removed. Loosen the fixed nut of the compressor wiring cover with an 8mm fixed wrench or pointed nose pliers, and then remove the nut and wiring cover in turn.


4) Use the mobile phone camera function to take photos or take notes of the lead role of the wiring terminal, so as to correctly install the lead after installing the new compressor, then use pointed nose pliers to remove the three leads on the wiring terminal, and then remove the gasket of the top wiring cover.


3. Remove the compressor


1. Remove the exhaust pipe and suction pipe during hot work


1) It is used to touch the two-way valve port of the outdoor unit. When no gas is discharged, it indicates that the refrigerant in the outdoor unit system has been completely discharged;


2) Use the welding torch to heat the exhaust pipe orifice of the compressor. When you see that the pipe orifice is burning red and the solder at the welding joint begins to flow, clamp the connecting copper pipe with pliers and lift it up to pull the connecting pipe out of the exhaust pipe. 3) use the same method to pull out the connecting pipe of the compressor suction pipe.


4) After pulling out the pipes of the exhaust pipe and suction pipe of the compressor, continue to use the welding torch to heat the pipes, so that the remaining solder on the surface can fully melt and flow until it falls down, making the surface smooth, so that it can be smoothly inserted into the pipe orifice of the new compressor.


5) After the pipe orifice surface of the connecting pipe is smooth, pull the pipe to separate it from the suction pipe orifice and exhaust pipe orifice of the compressor to prevent re connection due to excessive temperature.


2. Remove the compressor


The compressor is fixed on the outdoor unit base with 3 feet and fixed by 3 nuts with an outer diameter of 14mm.


Use a fixed wrench to remove the outermost ① nut, then remove the ② nut inside the rear side cover, and finally remove the ③ nut (dotted line position), which is located at the innermost position; Generally, it is necessary to remove or move the diaphragm between the compressor and the outdoor fan before loosening the nut with a wrench until it is removed.


When removing the three fixing nuts, the temperature of the connecting pipe and the pipe orifice of the compressor also gradually drops to normal temperature. At this time, observe the outdoor unit system and pay attention to the direction of the liquid storage bottle of the compressor, so as to determine the installation position of the new compressor.


Open or move the pipeline that affects the removal of the compressor, hold the outside of the compressor with both hands and lift it up to separate the foot from the outdoor unit base, and take out the compressor.


4. Install the compressor


1. Install the damping pad


Remove the 3 rubber pads on the feet of the old compressor and install them correctly on the feet of the new compressor.


2. Stationary compressor


Remove the plastic sealing plugs of the suction pipe and exhaust pipe of the new compressor, recall the fixing method of the old compressor, hold the shell with both hands, and install the three feet of the compressor into the three fixing rods of the outdoor unit base.


3. Welding pipeline


Sort out the connecting pipe, insert the thick pipe into the suction pipe orifice of the compressor, and insert the thin pipe into the exhaust pipe orifice. The insertion depth shall be subject to the traces left by the original pipe. After insertion, the pipe is in a natural state and shall not be fixed by external force, otherwise the pipe will move outward when welding the pipe orifice.


Welding torch shall be used to weld the connecting pipes of compressor exhaust pipe and suction pipe in turn. During welding, the pipe orifice shall be heated to dark red, and then the welding rod shall be added to seal the whole pipe orifice.


4. Install the retaining nut


At this time, the compressor nozzle temperature is high and cannot be directly used for leak detection. At this time, the fixed nut can be installed to wait for the nozzle temperature to drop naturally, and three foot nuts can be installed in turn.


In actual maintenance, the nut does not need to be tightened vigorously with a wrench. It is usually used to tighten it gently with a wrench after tightening.


5. Install the connecting cable


The steps of installing the connecting line are very important. If the connecting line is inserted incorrectly, the compressor will not start and operate normally. If the compressor of different model is replaced, measure the resistance of three terminals with a multimeter resistance block to determine the terminal function, and then install three connecting wires.


5. Close out work


1. Leak detection


Use refrigerant R22 headspace to completely exhaust the air in the system, install the thin pipe nut of the outdoor unit and tighten it with a wrench, and then charge about 0.7MPa of static refrigerant into the system for leak detection.


Pour the detergent onto the towel and knead the foam, apply it to the suction port and exhaust port of the compressor, check whether the welding parts are bubbling, so as to determine whether there is sand hole in the solder joint and cause the leakage of refrigerant to be normal. If the bubble indicates that there is a leak, the refrigerant should be released again and re welded until the leak is normal.


2. Install the wiring cover


Since the wiring cover is higher than the welding point of the exhaust pipe orifice, the wiring cover shall be installed after the leak detection is completed, and the fixing nut on the top shall be tightened.


3. Install the housing


Install the insulation cotton on the outside of the compressor, install the rear side cover, front side cover and upper top cover in turn, tighten all fixing screws, start the air conditioner again, charge the refrigerant to normal pressure, and complete the replacement of the compressor after the cooling or heating of the air conditioner is normal.


Chat Online 编辑模式下无法使用
Leave Your Message inputting...