5-4. Connecting Tubing between Indoor and Outdoor Units

a)Tightly connect the indoor side refrigerant tubing exten- ded from the wall with the outdoor side tubing. (Fig. 21)

b)To fasten the flare nuts, apply specified torque as:

Table 5

Tube Dia.

Nut

Tightening Torque

 

 

 

1/4" (6.35 mm)

21/32" (17 mm)

Approx. 120 – 160 lbs·in (140 – 180 kgf·cm)

 

 

 

3/8" (9.52 mm)

7/8" (22 mm)

Approx. 300 – 360 lbs·in (340 – 420 kgf·cm)

 

 

 

1/2" (12.70 mm)

1-1/32" (26 mm)

Approx. 430 – 480 lbs·in (490 – 550 kgf·cm)

 

 

 

5/8" (15.88 mm)

1-5/32" (29 mm)

Approx. 590 – 710 lbs·in (680 – 820 kgf·cm)

 

 

 

5-5. Insulation of Refrigerant Tubing

IMPORTANT

Torque wrench

Indoor unit

Spanner

 

 

Outdoor unit

 

Fig. 21

 

Insulation

 

Thickness:

Min.

min. 5/16"

5/16"

(8 mm)

(8 mm)

 

Fig. 22

To prevent heat loss and wet floors due to dripping of con-

densation, both tubes must be well insulated with a proper insulation material.

The thickness of the insulation should be a minimum 5/16" (8 mm). (Fig. 22)

Taping the flare nuts

Wind the insulation tape around the flare nuts at the tube connections. Secondly cover up the tubing connec- tions with the flare insulation (1/8" (T3, supplied)). Then wind the other flare insulation (3/16" (T5, supplied)).

Insulation tape (supplied)

Flare insulation (3/16"(T5, supplied) )

 

Flare insulation (1/8"(T3, supplied) )

 

Tube insulation

 

(not supplied)

Flare nut

 

Vinyl tie (supplied)

 

Fig. 23

Finally, fasten the insulation at both ends with the sup- plied vinyl ties. (Fig. 23)

Insulation material

The material used for insulation must have good insula- tion characteristics, be easy to use, be age resistant, and must not easily absorb moisture.

Drain hose insulation and vinyl tie (supplied)

Drain hose and hose band (supplied)

Drain pipe and insulation

Refrigerant tubing

(not supplied)

and insulation

 

(not supplied)

Insulation tape (supplied)

Vinyl tie (supplied)

Flare

insulation (supplied)

CAUTION

After a tube has been insulat-

ed, never try to bend it into a

 

 

 

narrow curve because it can

 

cause the tube to break or

 

crack.

The procedure used for installing the insulation for both wide and narrow tubes are the same.

Fig. 24

Never grasp the drain or refrigerant connecting out- lets when moving the unit.

22

Page 109 Page 111
Page 110
Image 110
Panasonic CS-KS12NB41 & CZ-18BT1U Connecting Tubing between Indoor and Outdoor Units, Insulation of Refrigerant Tubing
Page 109 Page 111

CS-KS18B4UW & CZ-18BT1U, CS-KS12NB41 & CZ-18BT1U, CU-KS12NK1A, CU-KS18NKUA specifications

Panasonic has long been a reputable name in the HVAC (Heating, Ventilation, and Air Conditioning) industry, continuously innovating to provide efficient and sustainable solutions. Among their latest offerings, the CU-KS18NKUA, CS-KS18B4UW, CU-KS12NK1A, and CS-KS12NB41 split systems stand out for their advanced features and technologies designed to enhance user comfort while minimizing environmental impact.

The CU-KS18NKUA and CS-KS18B4UW units are high-capacity air conditioning systems that cater to larger spaces. One of their defining features is the inverter technology, which allows the compressor to adjust its speed according to the demand, leading to significant energy savings. The units operate quietly, contributing to a peaceful environment whether in homes or offices. Furthermore, the super-efficient energy consumption aligns with modern sustainability practices, reducing users' carbon footprints.

The advanced R32 refrigerant used in these systems is another highlight. R32 is known for its lower global warming potential compared to traditional refrigerants, making it an eco-friendly choice. These models are equipped with a powerful cooling capability while maintaining a compact and sleek design, seamlessly integrating into various interior styles.

In terms of indoor air quality, both models incorporate a multi-stage filtration system. This system effectively filters out dust, allergens, and harmful particles, ensuring cleaner indoor air. Additionally, the nanoe-G technology helps in deodorizing and purifying the air, enhancing the overall comfort and health of the environment.

The CU-KS12NK1A and CS-KS12NB41 models cater to smaller rooms but do not compromise on performance. They share similar inverter technology and energy-efficient characteristics as their larger counterparts, ensuring that users can enjoy a comfortable climate in a smaller footprint.

With an emphasis on user-friendly design, all these models come with intuitive remote controls, allowing for easy temperature adjustments and scheduling. Some units even offer Wi-Fi connectivity for remote access and monitoring via smartphone apps.

The CZ-18BT1U, often paired with these outdoor units, serves as an innovative air conditioning solution that supports energy efficiency and provides reliable cooling performance.

Overall, the Panasonic CU-KS and CS series units are ideal for consumers looking for modern, efficient, and environmentally friendly air conditioning solutions. Their combination of advanced technologies, user-centric design, and eco-conscious operation set them apart in the competitive HVAC market.
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