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Copper pipe standards play a crucial role in the installation of air conditioning systems. When it comes to the effective operation of these systems, the quality and specifications of copper pipes cannot be overlooked. Understanding the different copper pipe standards is essential for professionals working in the HVAC industry or even individuals planning to install or replace air conditioners. This introduction will shed light on the importance of copper pipe standards, their implications on the performance and durability of air conditioning units, and the key factors to consider when choosing the appropriate copper pipes for your air conditioner. It aims to provide a comprehensive overview of the essential information that you need to know regarding copper pipe standards for air conditioners.
Installing copper pipes for air conditioners to the right standards is an extremely important and necessary job to help your home equipment operate stably. Let’s learn about copper pipe standards for air conditioners with Daotaomt.edu.vn through the article below!
Why must standard copper pipes be installed?
The correct installation of copper pipes will:
- Helps the air conditioner operate stably, run at correct performance and provide maximum cooling efficiency.
- Increases the durability of copper pipes and helps them last for a long time.
- Limit the situation of cracked pipes, gas leaks, pipe shrinkage that changes gas flow leading to serious consequences.
- When the machine has a problem or weak operation due to wrong copper pipe installation, it will be easy for manufacturers to refuse the warranty.
Insulated copper helps protect copper pipes from extreme weather conditions
Standard sizes of copper pipes for air conditioners
Standard size copper pipe
Copper pipe is used for 2 directions, which is the input pipe connecting the outdoor unit to the indoor unit and the output pipe connecting the indoor unit to the outdoor unit. The size of the inlet pipe will be smaller than the outlet pipe, specifically:
| Machine type | Inlet pipe diameter | Outlet diameter |
| 1 HP air conditioner. | 6 mm. | 10 mm. |
| Air conditioner 1.5 HP. | 6 mm. | 10mm or 12mm. |
| Air conditioner 2 HP. | 8 mm. | 12 mm. |
| Air conditioner 2.5 HP. | 8 mm. | 10mm or 12mm. |
In addition, air conditioners using R22 gas have a standard copper tube thickness of 0.51 – 0.61 mm and air conditioners using R410a gas have a minimum standard copper tube thickness of 0.61mm .
You should install copper pipes according to the standard size because it will be safe to use
Length of copper pipe connecting outdoor unit and indoor unit
The length of copper pipe connecting the outdoor unit and the indoor unit must be complied with the installation requirements specified by the manufacturer, because if the copper pipe is installed too short, it may occur that the gas cannot return to the compressor in time and blocked, causing serious damage.
Conversely, when the copper tube is too long, it may cause the air conditioner to cool slowly or not cool at all. In addition, if the copper pipe length is outside the limits specified by the company, the company may refuse to warranty the product.
The minimum length of copper pipe will be about 3m , the maximum is about 15-20m and the average length for the best operation of the air conditioner is 3-7m depending on the manufacturer.
The length of the copper pipe connecting the outdoor unit and the indoor unit should be installed according to the instructions of the air conditioner manufacturer
Height difference between outdoor unit and indoor unit
The height difference between the outdoor unit and the indoor unit is a factor that you need to pay attention to first when installing the air conditioner. Because according to the regulations of the manufacturers, this difference must be within their allowable limits and depends on the length of the copper pipe.
However, this height difference will not have too much effect, because users often install 2 outdoor and cold units on the same floor.
The height difference will be very important for high-rise buildings, apartments, etc. To know more about the height of each machine, you can see the technical specifications.
The height difference between the outdoor unit and the indoor unit is an important factor to pay attention to when installing the air conditioner
The most popular types of air-conditioner copper pipes in Vietnam
Copper Coil PC (Pancake Coil)
PC coil copper tube is one of the most popular refrigerant copper pipe lines. Pipes have standard lengths of 15m or 30 – 45m , depending on installation requirements. Ø6.35, Ø9.52, Ø12.7, Ø15.88 are common diameter lengths in which PC coil copper tubing is used.
This type of pipe has a minimum thickness of 0.61 mm , however, currently air-conditioners recommend using pipes with a diameter of 0.81mm for high pressure gases such as R410a, R32 .
-800x533.jpg "PC coil copper pipe is the most common type of copper pipe used by technicians today")
PC coil copper pipe is the most common type of copper pipe used by technicians today
Level Wound Coil (Level Wound Coil)
LWC coiled copper pipe (brass tube) is a large coil of copper pipe, weighing over 100kg and having a length of up to several thousand meters . The product has a thickness of about 0.27 – 1.2mm , usually soft annealed before being put into use to increase flexibility and more malleability.
Due to its superior length, this type of copper pipe makes installation convenient without the need for additional joints, suitable for layout in large, complex areas or for installation of central air conditioning systems.
LWC copper pipe is a large coiled copper tube and has a length of hundreds, thousands of meters
Straight Tube
Straight copper pipes (tree copper pipes) have a common length of 2 – 6m with a diameter ranging from Ø4.76 – 41.28 . Commonly used in factories producing heat exchangers, … and valves in the refrigeration industry.
In addition, due to the needs of use, straight copper pipes are also produced with different hardnesses such as hard tubes, semi-rigid tubes, bright annealed tubes and soft annealed tubes.
Straight copper tubes are commonly used in heat exchange plants
Insulation foam copper pipe
Insulated foam copper pipe is a type of copper pipe that helps to optimize the efficiency of the cooling system. This copper pipe product has a maximum length of up to 50m and has a layer of insulating foam wrapped around the outside, saving time and ensuring conduit technique. Insulated foam copper conduit has many benefits such as:
- Durable and safe copper pipe protection from harsh environments.
- Limiting corrosion of copper pipes during heat exchange.
- Helps save electricity when in use by limiting heat exchange with the environment.
- Support to reduce noise during use in large works and buildings.
Insulated copper conduit saves time and effectively protects copper pipes
Inner Grooved Tube
Clear striped copper tube is a new product that is popular in the market and has popular diameters from Ø5, Ø7, Ø7.94, Ø8, Ø9.52, Ø12.7 . The inside of the pipe is structured with striated grooves with twisting directions along the length of the pipe with the following uses:
- Increase heat exchanger efficiency.
- Due to the small size of the striped copper tube, the material is also more economical than other plain copper pipes.
- It is possible to keep and increase the thermal efficiency with a small size, since then the size of the air conditioner is also getting smaller and smaller.
The inner striped copper tube is designed with striped grooves inside the tube
Copper pipe sizes of some popular air conditioners today
| Machine series | Inverter Air Conditioner | Conventional air conditioner |
| Toshiba Air Conditioner. |
Model N3KCV:
|
Model N3KPX:
|
| Daikin air conditioner. |
Model FTKS:
Inverter Gas R22: FTKD
|
Model FTE:
|
| Panasonic Air Conditioner . |
Model TS:
|
Model KC/C:
|
| Sharp air conditioner. |
|
|
| Air conditioner Fujitsu/General. |
|
|
Above are the copper pipe standards for air conditioners that Daotaomt.edu.vn shares with you. If you have any questions, leave us a comment below!
In conclusion, understanding the copper pipe standards for air conditioners is crucial for ensuring efficient and effective cooling systems in both residential and commercial settings. The correct selection and installation of copper pipes are essential to maintain the proper flow of refrigerant and prevent leaks or other issues that could compromise the performance of an air conditioning unit. By adhering to industry standards such as ASTM B280, manufacturers, installers, and consumers can ensure the longevity and reliability of their air conditioning systems. Additionally, bearing in mind the importance of correct sizing, insulation, and maintenance of copper pipes will contribute to enhanced energy efficiency and cost savings. Therefore, familiarizing oneself with these standards is imperative for anyone involved in the air conditioning industry or anyone who owns or plans to invest in an air conditioning system.
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