1. General

This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instruc- tions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning.

If the electric wiring diagram does not appear in this manual, please check for the diagram on the indoor unit.

1-1. Tools Required for Installation (not supplied)

1.

Standard screwdriver

7.

Hacksaw

13.

Torque wrench

2.

Phillips head screwdriver

8.

Core bits

14.

Adjustable wrench

3.

Knife or wire stripper

9.

Hammer

15.

Reamer (for deburring)

4.

Tape measure

10.

Drill

16.

Vacuum pump (For R410A)

5.

Carpenter’s level

11.

Tube cutter

17.

Manifold valve

6.

Sabre saw or key hole saw

12.

Tube flaring tool

 

 

1-2. Accessories Supplied with Unit Table 1

 

Parts

Figure

Q’ty

Parts

Figure

Q’ty

Parts

Figure

Q’ty

Labels for inter-unit

A B C D

4 each

Cushion rubber

 

4

Reducer

CU-4KE24NBU

1

 

 

 

cable and tube

 

(1/2" 3/8")

CU-4KE31NBU

2

 

 

 

 

 

 

 

 

 

 

 

 

 

Reducer

CU-3KE19NBU

1

 

 

 

 

Packed in the outdoor unit.

(3/8"

1/2")

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1-3. Optional Copper Tubing Kit

Copper tubing for connecting the outdoor unit to the indoor unit is available in kits which contain the narrow and wide tubing, fittings and insulation. Consult your nearest sales outlet or air conditioning workshop.

1-4. Type of Copper Tube and Insulation Material

If you wish to purchase these materials separately from a local source, you will need:

1.Deoxidized annealed copper tube for refrigerant tub- ing as detailed in Table 2.

Cut each tube to the appropriate lengths 1' to 1'4" (30 cm to 40 cm) to dampen vibration between units.

Table 2

2.Foamed polyethylene insulation for the specified copper tubes as required to precise length of tubing. Wall thickness of the insulation should be not less than 5/16" (8 mm).

3.Use insulated copper wire for field wiring. Wire size varies with the total length of wiring.

Refer to 5. Wiring Instructions for details.

CAUTION

Check local electrical codes

and regulations before

 

 

 

obtaining wire. Also, check

 

any specified instructions or

 

limitations.

Model

Narrow Tube

Wide Tube

 

 

 

 

Outer Dia.

Thickness

Outer Dia.

Thickness

 

 

 

 

 

 

CS-MKE7NKU, CS-MKE9NKU, CS-MKE12NKU

1/4" (6.35 mm)

0.0314" (0.8 mm)

3/8" (9.52 mm)

0.0314" (0.8 mm)

 

 

 

 

 

CS-MKE18NKU

1/4" (6.35 mm)

0.0314" (0.8 mm)

1/2" (12.70 mm)

0.0314" (0.8 mm)

 

 

 

 

 

CS-MKE24NKU

1/4" (6.35 mm)

0.0314" (0.8 mm)

5/8" (15.88 mm)

0.0393" (1.0 mm)

 

 

 

 

 

CS-MKE9NB4U, CS-MKE12NB4U

1/4" (6.35 mm)

0.0314" (0.8 mm)

3/8" (9.52 mm)

0.0314" (0.8 mm)

 

 

 

 

 

CS-KE18NB4UW

1/4" (6.35 mm)

0.0314" (0.8 mm)

1/2" (12.70 mm)

0.0314" (0.8 mm)

 

 

 

 

 

1-5. Additional Materials Required for Installation

 

 

1.

Refrigeration (armored) tape

3.

Putty

2.

Insulated staples or clamps for connecting wire

4.

Refrigeration lubricant

 

(See local codes.)

5.

Clamps or saddles to secure refrigerant tubing

4

Page 99 Page 101
Page 100
Image 100
Panasonic CU-4KE24NBU, CU-4KE31NBU, CU-3KE19NBU service manual General
Page 99 Page 101

CU-3KE19NBU, CU-4KE24NBU, CU-4KE31NBU specifications

The Panasonic CU-4KE24NBU, CU-4KE31NBU, and CU-3KE19NBU are high-efficiency air conditioning units that represent Panasonic's commitment to innovative climate control solutions. These models integrate advanced technologies to deliver superior performance, energy savings, and user comfort, making them ideal for both residential and commercial applications.

The CU-4KE24NBU, a part of the ECOi series, is designed for medium-sized spaces. It boasts an impressive cooling capacity, ensuring optimal temperature regulation. Its inverter technology adjusts the compressor speed according to the needs of the environment, resulting in reduced energy consumption and consistent comfort levels. The unit operates quietly, making it suitable for bedrooms, offices, or other noise-sensitive environments. Additionally, it features a robust air filtration system that improves indoor air quality by removing dust and allergens.

The CU-4KE31NBU offers a slightly higher capacity, making it perfect for larger areas. Like its counterpart, it utilizes inverter technology, which not only enhances energy efficiency but also minimizes wear and tear on the components, leading to a longer lifespan. Its multi-split capability allows for the connection of multiple indoor units to a single outdoor unit, providing flexibility in installation. The CU-4KE31NBU also integrates smart technology that allows users to control the system remotely via smartphones, giving them greater convenience and control over their environment.

For applications requiring a more compact option, the CU-3KE19NBU is an excellent choice. This model balances size and power, offering a competitive cooling capacity that can easily service small to medium-sized rooms. The unit is designed for easy installation and maintenance, featuring a lightweight construction that simplifies handling by technicians. The efficient inverter technology ensures that users benefit from lower energy bills while maintaining a consistent indoor climate.

All three models are equipped with Panasonic’s advanced refrigerants, which contribute to their eco-friendly performance. These refrigerants help reduce greenhouse gas emissions while maintaining high efficiency. Moreover, the units come with built-in diagnostic capabilities, allowing for quick detection of any issues, thus ensuring that the systems operate at peak efficiency throughout their lifespan.

In summary, the Panasonic CU-4KE24NBU, CU-4KE31NBU, and CU-3KE19NBU are exemplary air conditioning solutions that combine cutting-edge technology with user-friendly features, ensuring that they meet the varying needs of today's consumers while promoting energy efficiency and sustainability.
Top Page Image Contents