Panasonic CU-3KE19NBU, CU-4KE31NBU Disconnect switch may be required by national or local codes

Page 119

WARNING

Be sure to comply with local codes on running the wire from the indoor unit to the outdoor unit (size of wire and wiring method, etc.).

Each wire must be firmly connected.

No wire should be allowed to touch refrigerant tubing, the compressor, or any moving part.

Be sure to connect power wires correctly match- ing up numbers on terminals of the outdoor unit and respective indoor units A – D.

CAUTION

Be sure to connect the power supply line to the outdoor unit as shown in the wiring diagram. The indoor unit draws its power from the outdoor unit.

Do not run wiring for antenna, signal, or power lines of television, radio, stereo, telephone, secu- rity system, or intercom any closer than 3'4" (1 m) from the power cable and wires between the indoor and outdoor units. Electrical noise may affect the operation.

5-3. Wiring System Diagram

3 indoor units with CU-3KE19NBU

*Disconnectswitch

 

 

 

Field

supply

 

 

 

 

 

 

 

 

INDOORUNIT

 

1

 

230/208V

 

OUTDOOR UNIT

 

 

 

 

 

 

 

 

 

 

 

 

 

Terminal

2

 

230/208V

(B)

Terminal(9P)

 

 

 

(A)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

230/208V

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(C)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

Grounding

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Disconnect

 

Field supply

 

(B)

 

 

 

230/208VACphase-Single60HZ

 

 

 

switch

 

 

 

 

 

 

 

 

INDOORUNIT

 

 

 

230/208V

 

(B)

 

 

 

 

 

 

1

 

 

 

4

 

 

 

 

 

 

 

 

 

UNITCB

supply

 

 

Terminal

3

 

230/208V

(C)

(B)

6

 

 

 

 

 

 

 

 

(B)

 

 

2

 

 

 

 

5

 

 

 

 

 

 

 

 

230/208V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Grounding

 

 

 

 

 

 

 

*switchDisconnect

 

 

 

line

7

 

 

 

 

 

 

Field supply

230/208V

 

 

 

 

 

UNITINDOOR

Terminal

1

 

(B)

230/208V

8

UNIT

L1Power

L2

lineGrounding

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

(C)

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

230/208V

(B)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(C)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Grounding

 

 

 

1

 

 

 

 

 

 

 

 

line

 

 

Terminal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(2P)

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(A)

 

 

Fig. 25a

WARNING

To avoid the risk of electric shock, each air conditioner unit must be grounded.

For the installation of a grounding device, please observe local electrical codes.

Grounding is necessary, especially for units using inverter circuits, in order to release charged electricity and electrical noise caused by high tension. Otherwise, electrical shock may occur.

Place a dedicated ground more than 7' (2 m) away from other grounds and do not have it shared with other electric appliances.

*NOTE

Disconnect switch may be required by national or local codes.

CAUTION

Always comply with national and local code requirements.

4 indoor units with CU-4KE24NBU, CU-4KE31NBU

 

 

 

*Disconnect

 

 

 

 

 

 

 

 

 

 

 

switch

Field supply

 

 

 

 

 

 

 

INDOORUNIT

 

1

 

 

 

230/208V

OUTDOOR UNIT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Terminal

2

 

switch

230/208V

Terminal(12P)

 

 

 

(A)

(C)

 

(B)

3

AUNIT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

230/208V

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Grounding line

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

*Disconnect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNITINDOOR

 

 

 

Field

supply

(B)

 

 

 

 

 

 

Terminal

1

 

 

6

BUNIT

 

 

 

 

 

 

 

 

(B)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

230/208V

4

 

 

 

 

(B)

 

 

(C)

 

 

 

 

 

 

 

 

 

 

3

 

 

230/208V

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

230/208V

 

 

 

 

 

 

 

 

 

 

 

 

 

(B)

 

 

 

60HZ

 

 

 

 

 

Grounding

line

 

 

 

 

 

 

 

 

 

 

*Disconnect

switch

 

 

 

 

 

UNITINDOOR

Terminal

 

(Inter-unit)

 

Field

supply

 

CUNIT

supply

230/208VACphase-Single

 

 

 

 

 

(B)

 

 

 

 

 

1

power line

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

230/208V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(C)

 

 

2

230/208V

(C)

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

9

 

 

 

 

 

 

 

230/208V

 

 

(B)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Grounding

 

 

 

 

 

 

 

 

 

 

 

line

 

 

230/208V

10

 

L1Power

 

 

 

UNITINDOOR

Terminal

*Disconnect

switch

 

 

 

DUNIT

L2

lineGrounding

 

 

 

 

Terminal (2P)

 

 

 

Field

supply

 

 

 

11

 

 

 

 

 

 

 

1

 

 

 

 

(B)

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

230/208V

 

 

 

 

 

 

(D)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

230/208V

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

(C)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Grounding

 

(B)

 

2

 

 

 

 

 

 

 

line

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(A)

 

 

Fig. 25b

23

Image 119
Contents DC Inverter MULTI-SYSTEM AIR Conditioner Safety Precautions Prohibit Table of Contents Appendix a Semi-Concealed Type Wall Mounted TypeOperating Range Duct Less Type Rated 230V Unit SpecificationsOutdoor Unit CU-3KE19NBU Indoor Unit CS-MKE9NKU ×Indoor Unit Outdoor Unit208V CU-4KE24NBU Running Amperes 10.1 Running Amperes 10.0 11.1 CU-4KE31NBU Running Amperes 12.3 10.3 Running Amperes 12.7 11.4 Outdoor Unit Major Component SpecificationsOutdoor Unit CU-4KE24NBU Outdoor Unit CU-4KE31NBU CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU Other Component SpecificationsDimensional Data Unit inchmm 852-0-0010-20400-0 Unit inchmm 852-0-0010-20300-0 Indoor unit Outdoor unit Refrigerant Flow DiagramInsulation of Refrigerant Tubing Valve Narrow tube Curve because it can cause the tube to break or crack Indoor Unit CS-MKE7NKU × Temperature ChartsTemperature Charts CU-3KE19NBU F21 Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NKU × Heating CharacteristicsIndoor Unit CS-MKE18NKU × Indoor Unit CS-MKE9NB4U × Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NB4U × Indoor Unit CS-KE12NB4UW × Temperature Charts CU-4KE24NBU 188 Lo fan Hi fan HH fan Outdoor Unit CU-4KE24NBU Indoor Unit CS-MKE12NKU × Indoor Unit CS-MKE18NKU × Indoor Unit CS-MKE24NKU × 23C 73F Current 21C Temp 70F 17C Air Indoor 63F Outdoor Unit CU-4KE24NBU Indoor Unit CS-MKE12NB4U × Indoor Unit CS-KE12NB4UW × Temperature Charts CU-4KE31NBU Wide 362 Pressure 290 High 218 Outdoor air temperature F C 73F 23C Temp Indoor 73F 23C Air Temp 86F 30C Temp Air Indoor 63F Wide 362 Current Indoor Outdoor Cooling CapacityCS-MKE12NB4U × Power Supply 230V Single Phase 60Hz Cooling CapacityCS-MKE9NKU × CS-KE18NB4UW + CS-MKE12NB4U + CS-MKE12NB4U 30,600 BTU/h CS-MKE9NB4U × Cooling Capacity Low Ambient TC Total Cooling Capacity BTU/h ENT. TEMP. o F o C Ambient TEMP. o F o C 12.8 23,390 23,310 18,570 22,160 24,260 30,760 22,560 28,790 22,730 TH Total Heating Capacity BTU/h Heating CapacityPower Supply 230V Single Phase 60Hz Heating Capacity 29,200 BTU/h 28,400 BTU/h 32,000 BTU/h 000 CFM Outdoor Unit CU-3KE19NBU 8FA2-5251-11700-1 Electric Wiring DiagramsOutdoor Unit CU-4KE24NBU 8FA2-5251-11500-1 Outdoor Unit CU-4KE31NBU 8FA2-5251-11300-1 Explanation of Functions FunctionsStop Cool Frequency control Fluctuation fanFluctuation fan Low Ambient Cooling Operation Non-stop defrosting Clean defrostProtective Functions Defrost Detection and ReleaseCurrent control Current ControlDescription of function Automatic frequency controlControl at Heat Start-up Compressor Temperature ControlReset conditions Low Start CurrentPrecautions before Performing Inspection or Repair Troubleshooting Before Calling for ServiceDisplay of the Error Monitor Lamps Trouble Diagnosis by Error Monitor LampsLocation of the Error Monitor Lamps Checking the defrost operation Work procedure Check items unit operationChecking the Outdoor System Checking the outdoor unitTrouble Diagnosis of Each Part Problems of Each Part and Inspection PointsInspection Points for Each Part CU-3KE19NBU MV0 MV1 MV2 CU-4KE24NBU CU-4KE31NBU Electric expansion valveRefrigerant gas pressure Branch tubing temperature sensorBreaker Trouble Diagnosis of Fan Motor Diagnostic procedureDiagnostic results Remedy for symptom 3 toComponents mixing proportions Characteristics of New Refrigerant R410AWhat is New Refrigerant R410A? CharacteristicsChecklist before Servicing Tools Specifically for R410A Tubing Installation ProceduresCase of Compressor Malfunction Procedure for Replacing CompressorR410A from changing Amount in the charging cylinder is less than 20%Example To prevent the compositionRecharging Case Refrigerant is LeakingWelding leaking points Use of Existing Units When Tubes are ExtendedCharging Additional Refrigerant Retro-Fitting Existing SystemsPage 852-6-4190-584-00-2 For Outdoor Unit ContentsPlease Read Before Starting ‡ 8VHWKHIODUHPHWKRGIRUFRQQHFWLQJWXELQJ Fins of the outdoor unit. You may get injuredGeneral For ceiling-mounted cassette units Installation Site SelectionIndoor Unit For wall-mounted unitsH1, H2, H3, H4 Connecting indoor unit for CU-4KE24NBU Connecting Indoor UnitsConnecting indoor unit for CU-3KE19NBU 815.88mm Locally purchased Connecting indoor unit for CU-4KE31NBU CS-MKE24NKU Back Baffle Plate for the Outdoor UnitIt is recommended to use baffle plates FrontAir Discharge Baffle Air Intake BafflePrecautions for installation CU-4KE31NBU Outer Dimensions of Outdoor UnitCU-3KE19NBU CU-4KE24NBUNever install only a single indoor unit Diagram of Outdoor Unit InstallationUse of the Flaring Method Installation ProcessFlaring Procedure with a Flare Tool Tubing Connections To 0.5 mm Adjust so that the amount of tube For ceiling-mounted cassette units Insulation of Refrigerant TubingTo prevent heat loss and wet floors due to dripping of con  For wall-mounted units Air Purging with a Vacuum Pump for Test Run Finishing the InstallationAir Purging Adapter manual, and use the adapter correctly External diameter of service port R410A 5/16If pump-down is not possible What is pump-down?Pump-down procedure  Pump DownRecommended Wire Length and Diameter Wiring InstructionsGeneral Precautions on Wiring Disconnect switch may be required by national or local codes For Indoor Unit How to connect wiring to the terminalFor Outdoor Unit  For solid core wiring or F-cable  For stranded wiringIndoor unit C Wiring Instructions for the Outdoor UnitIndoor unit D Indoor unit BPerforming a test run Checking tubing and wiringTest Run Installation Check Sheet Connecting a Home Automation DeviceDC1111-0
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Manual 114 pages 38.6 Kb Manual 56 pages 332 b

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.