5. Refrigerant Tubing

5-1. Use of the Flaring Method

Many of the conventional split system air conditioners employ the flaring method to connect refrigerant tubes which run between indoor and outdoor units. In this method, the copper tubes are flared at each end and connected with flare nuts.

5-2. Flaring Procedure with a Flare Tool

(1)Cut the copper tube to the required length with a tube cutter. It is recommended to cut approx. 12" to 20" (30 to 50 cm) longer than the tubing length you estimate.

(2)Remove burrs at the end of the copper tube with a tube reamer or file. This process is important and should be done carefully to make a good flare.

(Fig. 47)

NOTE

Deburring

Before

After

 

 

Fig. 47

Copper tubing

Reamer

When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 48)

(3)Remove the flare nut from the unit and be sure to mount it on the copper tube.

(4)Make a flare at the end of copper tube with a flare tool.* (Figs. 49a and 49b)

(*Use “RIDGID” or equivalent.)

If the special R410A flare tool is used:

0 to 0.0196" (0 to 0.5 mm)

Fig. 48

If the previous flare tool (clutch-type) is used:

0.0472" (1.2 mm)

Adjust so that the amount of tube protrusion is as shown in the figure.

NOTE

A good flare should have the following characteristics:

inside surface is glossy and smooth.

edge is smooth.

tapered sides are of uniform length.

5-3. Caution before Connecting Tubes Tightly

a)Be sure to apply a sealing cap or water-proof tape to prevent dust or water from getting into the tubes before they are used.

b)Be sure to apply refrigerant lubricant to the match- ing surfaces of the flare and union before connect- ing them together. This is effective for reducing gas leaks. (Fig. 50)

c)For proper connection, align the union tube and flare tube straight with each other, then screw in the flare nut lightly at first to obtain a smooth match. (Fig. 51)

Fig. 49a

Flare nut

Copper tubing

Flare tool

Fig. 49b

Apply refrigerant lubricant here and here

Fig. 50

Union

Flare nut

Fig. 51

21

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Panasonic CU-KS24NKUA, CS-KS24NKU Refrigerant Tubing, Use of the Flaring Method, Flaring Procedure with a Flare Tool
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CU-KS24NKUA, CS-KS24NKU, CU-KS24NKU specifications

The Panasonic CU-KS24NKUA, CU-KS24NKU, and CS-KS24NKU are a part of the company’s advanced air conditioning lineup, known for their efficient performance and user-friendly features. Designed to provide optimal cooling while ensuring energy efficiency, these models cater to both residential and commercial spaces, making them an ideal choice for various settings.

One of the standout features of the Panasonic CU-KS24NKUA and its counterparts is their inverter technology. This innovative approach allows the air conditioning units to adjust their cooling capacity based on the room's temperature, thus ensuring that they operate at peak efficiency. By minimizing energy consumption during low demand, the units not only lower electricity bills but also reduce environmental impact.

The CU-KS24NKU series is equipped with a powerful compressor that delivers high cooling performance, capable of rapidly cooling spaces even in extreme heat conditions. Additionally, with a robust SEER (Seasonal Energy Efficiency Ratio) rating, these models rank among the top in energy savings, making them suitable for energy-conscious consumers.

Continuous airflow is vital for maintaining a comfortable indoor environment, and the CS-KS24NKU includes features that enhance air circulation. Utilizing a multi-directional airflow system, these units ensure that cool air is distributed evenly throughout the room, minimizing hot spots and maximizing comfort.

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Remote control and smart capabilities are also integral features, allowing users to operate and schedule their air conditioner from anywhere within the home. This convenience adds a layer of flexibility to managing indoor climates, especially in today's fast-paced world.

In summary, the Panasonic CU-KS24NKUA, CU-KS24NKU, and CS-KS24NKU air conditioning units represent a perfect blend of advanced technology, energy efficiency, and user comfort. Their inverter technology, effective air distribution, quiet operation, and enhanced air filtration make them a valuable addition for those seeking reliable climate control while prioritizing sustainability and comfort.
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