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. 15)

NOTE

When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 16)

(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. 17 and 18)

(*Use “RIDGID” or equivalent.)

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. 19)

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. 20)

Deburring

Before

After

 

 

Fig. 15

Copper tubing

Reamer

 

Fig. 16

If the special R410A

If the previous flare tool

flare tool is used:

(clutch-type) is used:

0 to 0.0196"

0.0472" (1.2 mm)

(0 to 0.5 mm)

Adjust so that the amount of tube

 

 

protrusion is as shown in the figure.

Fig. 17

Flare nut

Copper tubing

Flare tool

Fig. 18

Apply refrigerant lubricant here and here

Fig. 19

Union

Flare nut

Fig. 20

16

Page 105 Page 107
Page 106
Image 106
Panasonic CU-KE18NKU Refrigerant Tubing, Use of the Flaring Method, Flaring Procedure with a Flare Tool, Deburring
Page 105 Page 107

CZ-18BT1U, CS-KE12NB41, CS-KE18NB4UW, CU-KE18NKU, CU-KE12NK1 specifications

The Panasonic CS-KE18NB4UW and CU-KE12NK1, along with the CS-KE12NB41, CZ-18BT1U, and CU-KE18NKU, represent a suite of advanced air conditioning solutions built with cutting-edge technologies designed to provide optimal comfort, energy efficiency, and air quality in various settings.

One of the standout features of this lineup is the inverter technology. Inverter air conditioners adjust the compressor speed to maintain the desired temperature efficiently. This leads to significant energy savings compared to traditional air conditioners, which tend to frequently cycle on and off, consuming more power. By continuously regulating the temperature, the Panasonic units not only save electricity but also prolong the lifespan of the compressor.

Another noteworthy characteristic is the nanoe™ technology integrated into some of these models. Nanoe™ technology uses hydroxyl radicals to purify the air, minimizing harmful bacteria and allergens. This makes the Panasonic units particularly suitable for users with allergies or respiratory issues, providing a cleaner and healthier indoor environment.

In terms of design, these models are sleek and compact, allowing them to fit seamlessly into any room decor, whether in a home, office, or commercial space. The quiet operation is another advantage, making them ideal for bedrooms and study areas where minimal noise is essential.

Furthermore, the CS-KE18NB4UW and CU-KE12NK1 offer a range of powerful cooling and heating capacities, making them versatile solutions for various climate conditions. The cold climate performance ensures consistent heating in colder regions, while the robust cooling capabilities make them perfect for hot summer months.

The user-friendly features include a smart remote control system, allowing users to adjust settings with ease from a distance. Some models are equipped with Wi-Fi capability, enabling integration with smart home systems for enhanced control and programmability.

In conclusion, the Panasonic CS-KE18NB4UW, CU-KE12NK1, CS-KE12NB41, CZ-18BT1U, and CU-KE18NKU air conditioning units exemplify innovation and efficiency. With their inverter technology, air purification features, compact designs, and smart functionalities, they stand out as ideal choices for maintaining comfortable and healthy indoor environments throughout the year.
Top Page Image Contents