(4)With the “Lo” knob of the manifold valve open, run the vacuum pump. The operation time for the vacu- um pump varies with tubing length and the capacity of the pump. The following table shows the amount of time for evacuation:

Table 6

Required time for evacuation when

26.4 gal/h (100 liter/h) vacuum pump is used

If tubing length is

If tubing length is

less than 33 ft. (10 m)

more than 33 ft. (10 m)

 

 

10 min. or more

15 min. or more

 

 

NOTE

To prevent other refrigerants from being mistakenly charged to units which use R410A, the size of the charge port on the service valve is different from the one for other refrigerant types. For servicing such as recharging, the specified charging hose, manifold and vacuum pump adapter (with reverse flow prevention) for R410A must be used.

NOTE

(5) With the vacuum pump still running, close the “Lo”

The required time in Table 6 is calculated based on the

knob of the manifold valve. Then stop the vacuum

assumption that the ideal (or target) vacuum condition

pump.

is around 0.193 psi (10 mmHg abs.).

(6) With the hex wrench, turn the valve stem on the

 

narrow tube service valve counter-clockwise by

90° (1/4 turn)

90 degrees (1/4 turn) for 10 seconds, and then turn

Narrow tube

 

the stem clockwise to close it again. (Fig. 28)

Hex wrench

 

 

CAUTION

Be sure to completely insert the hex

Wide tube

 

 

wrench before attempting to turn the valve.

(7) Leak test all joints at the tubing (both indoor and outdoors) with

 

soapy water. Bubbles indicate a leak. Tighten the joint more

 

when leaks, then check if there is no leak. Be sure to wipe off the

Valve cap

soap with a clean cloth.

Vacuum hose to manifold valve

Fig. 28

 

(8)With the hex wrench, turn the wide tube service valve stem counter-clockwise to fully open the valve.

(9)Turn the narrow tube service valve stem counter-clockwise to fully open the valve.

(10)Loosen the vacuum hose connected to the wide tube service port slightly to release the pressure. Then, remove the hose.

CAUTION

This may cause the refrigerant gas to leak. In order to avoid this, take off the hose quickly.

(11)Fasten the valve cap on the wide tube service port securely with an adjustable wrench or box wrench. Next, mount the valve cap on the service valve and tighten it to 170 lbs·in (200 kgf·cm) with a torque wrench. This process is very important to prevent gas from leaking from the system.

(12)Test run the air conditioner. (See next page.)

(13)While the air conditioner is running, apply liquid soap to check for any gas leaks around the service valves or caps.

(14)If there is no leakage, stop the air conditioner.

(15)Wipe off the soap on the tubing.

This completes air purging with a vacuum pump and the air condi- tioner is ready for actual operation.

24

Page 111 Page 113
Page 112
Image 112
Panasonic CU-KS18NKUA, CU-KS12NK1A Degrees 1/4 turn for 10 seconds, and then turn, Stem clockwise to close it again. Fig
Page 111 Page 113

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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