Panasonic CS-KE12NB41, CS-KE18NB4UW, CU-KE12NK1, CU-KE18NKU, CZ-18BT1U User Manual

TECHNICAL & SERVICE MANUAL

CS-KE12NB41 & CZ-18BT1U + CU-KE12NK1 CS-KE18NB4UW & CZ-18BT1U + CU-KE18NKU

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Indoor Model No.

Body (Panel)

CS-KE12NB41 (CZ-18BT1U)

CS-KE18NB4UW (CZ-18BT1U)

Product Code No.

Body (Panel)

1 852 361 05 (1 852 361 15)

1 852 361 07 (1 852 361 15)

Indoor Unit

Body

Panel

CS-KE12NB41 (Body) & CZ-18BT1U (Panel) CS-KE18NB4UW (Body) & CZ-18BT1U (Panel)

Outdoor Model No. Product Code No.

CU-KE12NK1

CU-KE18NKU

1 852 361 17

1 852 361 20

Outdoor Unit

CU-KE12NK1

Remote Controller

Wired Remote Controller

(Option)

CU-KE18NKU

REFERENCE NO. SM700880

SAFETY PRECAUTIONS

• Before doing repair work, please read the " SAFETY PRECAUTIONS" carefully and fully understand them.

• The precautionary items here are divided into " Warning" and " Caution" items. Items in particular which may cause death or serious injury to the service personnel if the work is not performed correctly, are included in the " Warning" table. However, even precautionary items identified as " Caution" also have the potential for serious consequences if not performed correctly. Important safety precautions are described for all items in both categories. Be sure to carefully follow all of them.

• Symbol Indication

: This symbol indicates items to which we need to pay attention.

In this triangle, a definite precautionary item is described.

: This symbol indicates the item to be prohibited.

In or close to this circle, a prohibited item is described.

: This symbol indicates the items requiring special attention or instruction.

In or close to this circle, a prohibited item is described.

• After doing repair work, perform a test run to confirm that there are no abnormalities. At the same time, explain the precautions in use to the user.

Warning

Before performing an overhaul, disconnect the power plug or power cable from the unit. Performing the work with the power supplied to the unit, may cause an electric shock.

When repair work or circuit inspection that requires power supply for the air conditioner, is to be performed, do not touch the charging section. Doing so may cause an electric shock.

Prohibit

For the step-up capacitor attached to the electric section, perform the repair work after sufficiently discharging it. Insufficient capacitor discharge may cause an electric shock.

Do not perform repair work on the electric sections with wet hands. Doing so may cause an electric shock.

Do not start or stop the air conditioner by means of connecting or disconnecting the power plug. Doing so may cause an electric shock or fire.

When conducting repair work only use components included in the parts list for the corresponding unit and perform the work with the appropriate tools. Incorrect or poor repair work may cause an electric shock or fire.

Never modify the unit. Doing so may cause an electric shock or fire.

Perform all electric work according to local applicable regulations related to electrical equipment or interior wiring regulation and make sure to use the exclusive circuit. Insufficient capacity to the electric circuit or defective arrangement results may cause an electric shock or fire.

Make sure to replace any power cable or lead wire showing any signs of scratch or deterioration. Failure to do so may cause an electric shock, overheating or fire.

Make sure that there is no dust on or slack in the power plug and insert fully into the socket. Dust or incomplete connections may cause an electric shock or fire.

Do not damage or process the power cord, as it may cause an electric shock or fire.

Prohibit

For the wiring between the indoor unit and outdoor unit, securely fix the specified cable onto the terminal plate. Poorly fixed wiring may cause a heat or fire.

After connecting the wiring between the indoor unit and outdoor unit, attach the terminal cover securely. Incomplete attachment of the terminal cover may cause overheating or fire.

Warning

If refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite.

If refrigerant gas leaks during the work, ventilate the room. If refrigerant gas catches fire, harmful gas may be generated.

Do not mix any gas other than the specified refrigerant gas in the refrigerating cycle. If air or other contaminants mix with the gas, pressure will become extremely high in the refrigerating cycle, which may cause a unit breakdown."

When the welded section of the compressor intake or discharge pipe is to be disconnected, perform it in a well-ventilated place after sufficiently recovering the refrigerant gas. Any residue gas may jet out refrigerant or refrigerating machine oil, which may cause an injury.

When the work is to be performed in a high place (About 2 meters or more), make sure to wear a safety helmet, gloves and safety belt. Insufficient safety gear may cause a serious injury in case of a fall.

When the unit is to be relocated, confirm that the new installation location has sufficient strength for the weight of the unit. Insufficient strength of the installation location and incomplete installation work may cause an injury due to the unit falling.

When the remote controller batteries are replaced, dispose of the old batteries out of the reach of children. If a child swallows a battery, make sure that the child gets immediate medical attention.

Caution

Prohibit

Do not wash the air conditioner with water, as this may cause an electric shock or fire.

For the repair work in places with high humidity or moisture, make sure to ground the unit. Failure to do so may cause an electric shock.

Confirm that the component attachment position, wiring condition, soldering condition and connector connection are normal. If not, it may cause overheating or fire.

Confirm that the temperature around the compressor is not too high, and then perform the repair work. Failure to do so may cause a burn.

Perform welding work in a place with good ventilation. If the work is performed in a poorly ventilated area, it might cause a lack of oxygen.

If the installation plate or attachment frame has deteriorated due to corrosion, etc., replace it. Failure to do so may cause an injury due to the unit falling.

When the cleaning is to be performed, make sure to turn off the power and pull out the plug. Touching the fan that is rotating at high speed may result in an injury.

When the indoor unit is to be removed, do not place it on an incline. Doing so may cause wet furniture because water left inside may trickle down.

Do not hold the sharp end of the unit or the aluminum fins, as it may cause an injury to your hand or finger.

Prohibit

After repairs, make sure to measure the insulation resistance and confirm that the value is 1 Mohm or more. Any insulation error may cause an electric shock.

After repairs, make sure to check the drainage of the indoor unit. Inappropriate drainage may cause wet furniture and floors due to water leakage.

Page

SAFETY PRECAUTIONS

TABLE OF CONTENTS

1. OPERATING RANGE

2. SPECIFICATIONS

2-1. Unit Specifications 2-2. Major Component Specifications 2-3. Other Component Specifications

3. DIMENSIONAL DATA

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

5. PERFORMANCE DATA

5-1. Temperature Charts 5-2. Cooling Capacity 5-3. Cooling Capacity (Low Ambient) 5-4. Heating Capacity

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7 13 17

23 27 29 31

6. ELECTRICAL DATA

6-1. Electrical Characteristics 6-2. Electric Wiring Diagrams

7. MAINTENANCE

7-1. Address Setting of the Remote Control Unit 7-2. Disconnecting and Connecting Positive Connector for Outdoor Unit 7-3. Disassembly Procedure

8. FUNCTIONS

8-1. Operation Functions 8-2. Protective Functions

9. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)

9-1. Precautions before Performing Inspection or Repair 9-2. Method of Self-Diagnostics 9-3. Checking the Indoor and Outdoor Units 9-4. Trouble Diagnosis of Fan Motor 9-5. Noise Malfunction and Electromagnetic Interference

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33 35

38 39 40

47 49

51 51 53 57 59

10. CHECKING ELECTRICAL COMPONENTS

10-1. Measurement of Insulation Resistance 10-2. Checking Continuity of Fuse on PCB Ass'y

11. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT

11-1. Characteristics of New Refrigerant R410A 11-2. Checklist before Servicing 11-3. Tools Specifically for R410A 11-4. Tubing Installation Procedures 11-5. In Case of Compressor Malfunction 11-6. In Case Refrigerant is Leaking 11-7. Charging Additional Refrigerant 11-8. Retro-Fitting Existing Systems

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60 61

62 63 64 64 65 67 68 68

APPENDIX A Operating Instructions

(CS-KE12NB41 & CZ-18BT1U + CU-KE12NK1 CS-KE18NB4UW & CZ-18BT1U + CU-KE18NKU)

APPENDIX B INSTALLATION INSTRUCTIONS

(CS-KE12NB41 & CZ-18BT1U + CU-KE12NK1 CS-KE18NB4UW & CZ-18BT1U + CU-KE18NKU)

APPENDIX C Operating Instructions

(CZ-RD515U)

APPENDIX D INSTALLATION INSTRUCTIONS

(CZ-RD515U)

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A-1

A-2

A-3

A-4

1. OPERATING RANGE

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Cooling

Heating

Maximum

Minimum

Maximum

Minimum

95 °F DB / 71 °F WB

67 °F DB / 57 °F WB

80 °F DB / 67 °F WB

– DB / – WB

115 °F DB

0 °F DB

75 °F DB / 65 °F WB

– DB / 0 °F WB

2. SPECIFICATIONS

2-1. Unit Specifications

2-1-1.

Indoor Unit CS-KE12NB41 & CZ-18BT1U Outdoor Unit CU-KE12NK1

Voltage Rating

Total Capacity

Sensible Capacity Latent Capacity

Performance

Air Circulation (Hi/Me/Lo) ft Moisture Removal (High) Pints/h Available Voltage Range Running Amperes

EER BTU/h/W 9.44 COP W/W SEER BTU/Wh 16 HSPF BTU/Wh -

Electrical Rating

Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity A 20 Controls / Temperature Control Control Unit Timer

Indoor / OutdoorFan Speeds

Airflow Direction (Indoor) Horizontal

Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control

Features

Operation Sound

Refrigerant Tubing Connections

Refrigerant inch (mm) Tube Diameter inch (mm) Wired Remote Controller (Option) CZ-RD515U

Indoor : Hi/Me/Lo Outdoor : Hi

Narrow tube Wide tube

BTU/h

BTU/h BTU/h

/min (m3/h)

Vertical

dB-A dB-A

ft (m)Max. allowable tubing length at shipment

11,900

235(399) / 206(350) / 194(330)

V A

12.6

WPower Input

1,260

%Power Factor 87

A20

( 3,000 to 11,900 )

3.5

( 0.9 to 3.5 )

( 2.5 to 12.6 ) ( 250 to 1,260 )

24-Hour ON or OFF Timer, 1-Hour OFF Timer

34 / 32 / 31

115V Single-Phase 60Hz

Cooling

7,200 4,700

4.26

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

Auto and 3 steps / Auto (Hi, Me, Lo)

Washable, Anti-Mold

DC Rotary (Inverter)

R410A / 2.43 (1,100)

Electric Expansion Valve

Heating

13,600

268(455) / 247(420) / 224(381)

104 to 126

1,460

Auto

Flare Type

25 (7.5) 1/4 (6.35) 3/8 (9.52)

( 3,000 to 13,600 )

4.0

( 0.9 to 4.0 )

14.6

( 2.5 to 14.6 ) ( 250 to 1,460 )

35 / 34 / 32

2.74

8.5

Indoor Unit CS-KE12NB41 & CZ-18BT1U Outdoor Unit CU-KE12NK1

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth 28-1/8 (714)

Weight Ib. (kg)

Net Shipping

Shipping Volume

Dimensions & Weight (Outdoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth

Weight Ib. (kg)

Net Shipping

Shipping Volume

Remarks: Rating conditions are:

Cooling: Indoor air temperature 80 °F DB / 67 °F WB

Outdoor air temperature 95 °F DB / 75 °F WB

Indoor Unit

(CS-KE12NB41 & CZ-18BT1U)

inch (mm) (313)12-5/16

inch (mm) 22-5/8 (575) inch (mm)

(625)24-19/32 (625)24-19/32

inch (mm) -

inch (mm) 24-13/16 (630) inch (mm)

(18.7)41.3

Ib. (kg)

cu.ft (m

)

Body

(CS-KE12NB41)

11-5/32 (283)

22-5/8 (575)

11-13/32 (290)

35.3 (16)

41.9 (19)

4.59 (0.13)

Outdoor Unit

(CU-KE12NK1)

inch (mm) (548)21-9/16

Individual Unit

inch (mm) inch (mm) inch (mm)

inch (mm) inch (mm)

(720)28-11/32 (265)10-7/16 (596)23-15/32

(866)34-3/32 (368)14-1/2 (35.0)77.2

Ib. (kg)

cu.ft (m

)

(38.0)83.8

(0.18)6.35

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Heating: Indoor air temperature 70 °F DB

Outdoor air temperature 47 °F DB / 43 °F WB

Panel

(CZ-18BT1U)

1-9/16 (40)

24-19/32 (625) 24-19/32 (625)

4-1/8 (105)

26-3/16 (665)

26-11/16 (678)

6.0 (2.7)

7.7 (3.5)

1.65 (0.04)

2-1-2.

Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU

Voltage Rating

Total Capacity

Sensible Capacity Latent Capacity

Performance

Air Circulation (Hi/Me/Lo) ft Moisture Removal (High) Pints/h Available Voltage Range Running Amperes

EER BTU/h/W 9.41 COP W/W SEER BTU/Wh 16 HSPF BTU/Wh -

Electrical Rating

Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity A 15 Controls / Temperature Control Control Unit Timer

Indoor / OutdoorFan Speeds

Airflow Direction (Indoor) Horizontal

Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control

Features

Operation Sound

Refrigerant Tubing Connections

Refrigerant inch (mm) Tube Diameter inch (mm) Wired Remote Controller (Option) CZ-RD515U

Indoor : Hi/Me/Lo Outdoor : Hi

Narrow tube Wide tube

BTU/h

BTU/h BTU/h

/min (m3/h)

Vertical

dB-A dB-A

ft (m)Max. allowable tubing length at shipment

17,500

5.15

341(579) / 294(500) / 253(430)

V A

WPower Input

1,860

%Power Factor 97

A 17.5

( 4,000 to 17,500 ) ( 1.2 to 5.15 )

8.3

( 1.2 to 8.3 ) ( 250 to 1,860 )

24-Hour ON or OFF Timer, 1-Hour OFF Timer

44 / 40 / 36

230V Single-Phase 60Hz

Cooling

10,600

6,900

4.89

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

Auto and 3 steps / Auto (Hi, Me, Lo)

Washable, Anti-Mold

DC Twin Rotary (Inverter)

R410A / 2.87 (1,300)

Electric Expansion Valve

Heating

20,400

383(651) / 324(551) / 265(450)

187 to 253

2,340

Auto

Flare Type

25 (7.5) 1/4 (6.35) 1/2 (12.7)

( 4,400 to 20,400 )

6.0

( 1.3 to 6.0 )

10.5

( 1.3 to 10.5 ) ( 270 to 2,340 )

44 / 40 / 36

2.56

8.5

< 230V >

Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth

Weight Ib. (kg)

Shipping Volume

Net Shipping

inch (mm)

inch (mm) inch (mm) inch (mm)

inch (mm) inch (mm)

Ib. (kg)

cu.ft (m

Indoor Unit

(CS-KE18NB4UW & CZ-18BT1U)

(313)12-5/16

(625)24-19/32 (625)24-19/32

(18.7)41.3

)

Individual Unit

Body

(CS-KE18NB4UW)

11-5/32 (283)

22-5/8 (575) 22-5/8 (575)

24-19/32 (625) 24-19/32 (625)

11-13/32 (290)

24-13/16 (630)

28-1/8 (714)

26-11/16 (678)

35.3 (16)

41.9 (19)

4.59 (0.13)

< 230V >

Panel

(CZ-18BT1U)

1-9/16 (40)

4-1/8 (105)

26-3/16 (665)

6.0 (2.7)

7.7 (3.5)

1.65 (0.04)

Dimensions & Weight (Outdoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth

Weight Ib. (kg)

Net Shipping

Shipping Volume

Remarks: Rating conditions are:

Cooling: Indoor air temperature 80 °F DB / 67 °F WB

Outdoor air temperature 95 °F DB / 75 °F WB

Outdoor Unit

(CU-KE18NKU)

inch (mm) (670)26-3/8

inch (mm) inch (mm) inch (mm)

inch (mm) inch (mm)

Ib. (kg)

cu.ft (m

)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Heating: Indoor air temperature 70 °F DB

Outdoor air temperature 47 °F DB / 43 °F WB

(880)34-21/32 (285)11-7/32 (733)28-27/32

(1,012)39-27/32 (379)14-29/32 (44.0)97.0 (48.0)105.8

(0.28)9.88

2-1-3.

Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU

Voltage Rating

Total Capacity

Sensible Capacity Latent Capacity

Performance

Air Circulation (Hi/Me/Lo) ft Moisture Removal (High) Pints/h Available Voltage Range Running Amperes

EER BTU/h/W 9.41 COP W/W SEER BTU/Wh 16 HSPF BTU/Wh -

Electrical Rating

Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity A 15 Controls / Temperature Control Control Unit Timer

Indoor / OutdoorFan Speeds

Airflow Direction (Indoor) Horizontal

Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control

Features

Operation Sound

Refrigerant Tubing Connections

Refrigerant inch (mm) Tube Diameter inch (mm) Wired Remote Controller (Option) CZ-RD515U

Indoor : Hi/Me/Lo Outdoor : Hi

Narrow tube Wide tube

BTU/h

BTU/h BTU/h

/min (m3/h)

Vertical

dB-A dB-A

ft (m)Max. allowable tubing length at shipment

17,500

5.15

341(579) / 294(500) / 253(430)

V A

WPower Input

1,860

%Power Factor 98

A 17.5

( 4,000 to 17,500 ) ( 1.2 to 5.15 )

9.1

( 1.2 to 9.1 ) ( 250 to 1,860 )

24-Hour ON or OFF Timer, 1-Hour OFF Timer

44 / 40 / 36

208V Single-Phase 60Hz

Cooling

10,600

6,900

4.89

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

Auto and 3 steps / Auto (Hi, Me, Lo)

Washable, Anti-Mold

DC Twin Rotary (Inverter)

R410A / 2.87 (1,300)

Electric Expansion Valve

Heating

20,400

383(651) / 324(551) / 265(450)

187 to 253

2,340

Auto

Flare Type

25 (7.5) 1/4 (6.35) 1/2 (12.7)

( 4,400 to 20,400 )

6.0

( 1.3 to 6.0 )

11.5

( 1.3 to 11.5 ) ( 270 to 2,340 )

44 / 40 / 36

2.56

8.5

< 208V >

Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth

Weight Ib. (kg)

Shipping Volume

Net Shipping

inch (mm)

inch (mm) inch (mm) inch (mm)

inch (mm) inch (mm)

Ib. (kg)

cu.ft (m

Indoor Unit

(CZ-KE18NB4UW & CZ-18BT1U)

(313)12-5/16

(625)24-19/32 (625)24-19/32

(18.7)41.3

)

Individual Unit

Body

(CS-KE18NB4UW)

11-5/32 (283)

22-5/8 (575) 22-5/8 (575)

24-19/32 (625) 24-19/32 (625)

11-13/32 (290)

24-13/16 (630)

28-1/8 (714)

26-11/16 (678)

35.3 (16)

41.9 (19)

4.59 (0.13)

< 208V >

Panel

(CZ-18BT1U)

1-9/16 (40)

4-1/8 (105)

26-3/16 (665)

6.0 (2.7)

7.7 (3.5)

1.65 (0.04)

Dimensions & Weight (Outdoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth

Weight Ib. (kg)

Net Shipping

Shipping Volume

Remarks: Rating conditions are:

Cooling: Indoor air temperature 80 °F DB / 67 °F WB

Outdoor air temperature 95 °F DB / 75 °F WB

Outdoor Unit

(CU-KE18NKU)

inch (mm) (670)26-3/8

inch (mm) inch (mm) inch (mm)

inch (mm) inch (mm)

Ib. (kg)

cu.ft (m

)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Heating: Indoor air temperature 70 °F DB

Outdoor air temperature 47 °F DB / 43 °F WB

(880)34-21/32 (285)11-7/32 (733)28-27/32

(1,012)39-27/32 (379)14-29/32 (44.0)97.0 (48.0)105.8

(0.28)9.88

2-2. Major Component Specifications

2-2-1. Indoor Unit

Indoor Unit (Body) CS-KE12NB41

Control PCB

Part No.

Controls

Control Circuit Fuse

Fan

Type Q'ty ... Dia. and Length

Fan Motor

Type Model ... Q'ty No. of Poles

Rough Measure RPM (Cool / Heat)

Rating Voltage / Nominal Output

Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over- Current Protection Over- Heat Protection

Run Capacitor Micro F

inch (mm)

Ohm

VAC

CB-CS-KE12NB4U

Microprocessor

250V 3A

Turbo

1 ... D12-5/8 / L5-3/4 (D322/L147)

DC Motor

SIC-62FW-D866-2 ... 1

470 / 520

DC160V / 23W

Internal Controller

Ye s Ye s

Drain Pump

Model ... Q'ty

Rating Voltage, Hz

(Ambient Temp. 68 °F (20 °C))

Safty Device

Heat Exchanger Coil

Coil

Rows Fins per inch

Input

Type Open

Ohm

°F (°C)

(m2)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

PLD-12115ST-1 ... 1

Aluminum Plate Fin / Copper Tube

Indoor Unit (Panel) CZ-18BT1U

Flap Motor

Type Stepping Motor

Model ... Q'ty

Rating

Coil Resistance Ohm

(Ambient Temp. 77 °F (25 °C))

Each Pair of Terminal : 380 +/- 7%

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

AC115V, 60Hz

10.8

101 +/- 10%Coil Resistance

Thermal Fuse

293 (145)

18.1

2.94 (0.273) Face Area

MPZN-12V ... 2

DC 12V

Indoor Unit (Body) CS-KE18NB4UW

Control PCB

Part No.

Controls

Control Circuit Fuse

Fan

Type Q'ty ... Dia. and Length

Fan Motor

Type Model ... Q'ty No. of Poles

Rough Measure RPM (Cool / Heat)

Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over- Current Protection Over- Heat Protection

Run Capacitor Micro F

inch (mm)

Ohm

VAC

CB-CS-KE18NB4U

Microprocessor

250V 3A

Turbo

1 ... D12-5/8 / L5-3/4 (D322/L147)

DC Motor

SIC-62FV-D866-2 ... 1

650 / 720

DC340V / 20WRating Voltage / Nominal Output

Thermal Fuse

Ye s Ye s

Drain Pump

Model ... Q'ty

Rating Voltage, Hz

Input

PLD-12230ST-1 ... 1

AC208 to 240V, 60Hz

Ohm

(Ambient Temp. 68 °F (20 °C))

Safty Device

Type Open

°F (°C)

Heat Exchanger Coil

Coil

Aluminum Plate Fin / Copper Tube

Rows Fins per inch

(m2)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Indoor Unit (Panel) CZ-18BT1U

Flap Motor

Type Stepping Motor

Model ... Q'ty

Rating

Coil Resistance Ohm

(Ambient Temp. 77 °F (25 °C))

Each Pair of Terminal : 380 +/- 7%

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

MP24ZN-12V ... 2

10.8

333 +/- 10%Coil Resistance

Thermal Fuse

293 (145)

18.1

2.94 (0.273) Face Area

DC 12V

2-2-2. Outdoor Unit

Outdoor Unit CU-KE12NK1

Control PCB

Part No.

Controls

Control Circuit Fuse

Compressor

Type

Compressor Model / Nominal Output

Compressor Oil ... Amount Coil Resistance (Ambient Temp. 68 °F (20 °C))

Safety Device

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Overload Relay

Run Capacitor

Crankcase Heater

Pints (cc)

Ohm

Model

Operation Temp.

Micro F

VAC

CB-CU-KE12NK1

Microprocessor

125V 25A

DC Rotary (Hermetic)

G4C090LU1ER / 900W

FV50S ... 0.68 (320)

U - V :

0.81

V - W :

W - U :

0.81

Ye s Ye s Ye s

CS-7L115

Open : 239 °F (115 °C), Close : 203 °F (95 °C)

115V 20W

Fan

Type

Q'ty ... Dia. inch (mm)

Fan Motor

Type Model ... Q'ty No. of Poles

Rough Measure RPM (Cool / Heat)

Nominal Output

Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over- Current Protection

Run Capacitor

Heat Exchanger Coil

Coil

Rows Fins per inch

Face Area

Ohm

Micro F

VAC

(m2)

Propeller

1 ... D15-3/4 (D400)

DC Motor

SIC-67FV-F460-1... 1

750 / 750

RED - WHT :

WHT - BLU :

BLU - RED :

77.5

Internal Controller

Ye s

Aluminum Plate Fin / Copper Tube

18.1

3.95 (0.367)

External Finish Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Outdoor Unit CU-KE18NKU

Control PCB

Part No.

Controls

Control Circuit Fuse

Compressor

Type

Compressor Model / Nominal Output

Compressor Oil ... Amount Coil Resistance (Ambient Temp. 68 °F (20 °C))

Safety Device

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Overload Relay

Run Capacitor

Crankcase Heater

Pints (cc)

Ohm

Model

Operation Temp.

Micro F

VAC

CB-CU-KE18NKU

Microprocessor

250V 25A

DC Twin Rotary (Hermetic)

C-6RVN93H0M / 1,050W

FV50S ... 0.74 (350)

R - S :

0.482

S - T :

0.482

T - R :

0.482

Ye s Ye s Ye s

CS-7L115

Open : 239 °F (115 °C), Close : 203 °F (95 °C)

Fan

Type

Q'ty ... Dia. inch (mm)

Fan Motor

Type Model ... Q'ty No. of Poles

Rough Measure RPM (Cool / Heat)

Nominal Output

Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over- Current Protection

Run Capacitor

Heat Exchanger Coil

Coil

Rows Fins per inch

Face Area

Ohm

Micro F

VAC

(m2)

Propeller

1 ... D16-17/32 (D420)

DC Motor

SIC-67FV-F460-1 ... 1

820 / 850

RED - WHT :

WHT - BLU :

BLU - RED :

77.5

Internal Controller

Ye s

Aluminum Plate Fin / Copper Tube

21.2

5.49 (0.510)

External Finish Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

2-3. Other Component Specifications

Indoor Unit CS-KE12NB41 & CZ-18BT1U CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE12NK1 CU-KE18NKU

• Indoor air temp sensor

(Model:KTEC-35-S98)

• Indoor heat exchanger sensor

(Model:PT2M-51H-S3)

• Compressor temp sensor

(CU-KE12NK1 (CU-KE18NKU

...

Model:DTN-TKS274Y TH2)

...

Model:DTN-TKS293B)

Resistance (k ohm)

59 68 77 86 95 104

(10) (15) (20) (25) (30) (35) (40)

Temperature °F (°C)

200

180

160

140

120

100

Resistance (k ohm)

32 50 68 86 104 122 140 158 176 194 (0) (10) (20) (30) (40) (50) (60) (70) (80) (90)

Temperature °F (°C)

• Outdoor air temp sensor

(CU-KE12NK1 (CU-KE18NKU

...

Model:DTN-TKS269B)

...

Model:TKS295B)

• Outdoor heat exchanger sensor

(CU-KE12NK1 (CU-KE18NKU

...

Model:DTN-TKS274Y TH1)

...

Model:TKS292B)

Resistance (k ohm)

4 5 14 23 32 41 50 59 68

(

20)(-15)(-10) (-5) (0) (5) (10) (15) (20)

Temperature °F (°C)

3. DIMENSIONAL DATA

Indoor Unit CS-KE12NB41 & CZ-18BT1U CS-KE18NB4UW & CZ-18BT1U

7-11/16

4-29/32

A View

1-3/16

21/32

3-1/8

(534)

21-1/32

23-5/8 (600)

Suspension bolt pitch

Ceiling opening dimensions

Center of

panel

(flared)

1/4" (flared)

dia.

dia. 1/2"

23-5/8 (600)

21-1/32 (534)

Ceiling opening dimensions

Suspension bolt pitch

12-7/16

12-7/8

22-5/8 (575)

6-5/16 6-11/16

2-3/32

1-25/32

11-5/32 (283)

8-15/32

1-3/16 (30)

1-25/32

4-19/32

Less than 31/32 Less than 31/32

The length of the suspension

14-3/32 (358)

24-19/32 (625)

25/32

bolts should be selected so that

there is a gap of 1-3/16" or

the ceiling (21/32" or more

below the lower surface of the

main unit), as shown in the

figure at right. If the suspension

bolts is too long, it will contact

the ceiling panel and the unit

cannot be installed.

24-19/32 (625)

13-5/32 (334)

5-9/16

2-3/4 1-9/32

(liquid tube)

Air intake

Discharge outlet

Refrigerant tubing

(gas tube)

Refrigerant tubing

Drain tube connection port VP20 (outer dia. 1")

Power supply port

Suspension bolt hole (4 - 1/2" x 1-1/8" hole)

Fresh air intake duct connection port (dia. 3-7/8")

22-5/8 (575)

2-3/32

3-5/8

7-23/32

1-27/32 1-3/32

Unit : inch (mm)

Outdoor Unit CU-KE12NK1

3-19/32

10-13/16

21-3/16

ID:23/32

28-11/32 (720) 2-1/8

4-ID:15/16

3-19/32

15/32

11-13/32

10-7/16 (265)

12-7/16

Wide tube service valve dia.3/8" (9.52)

Narrow tube service valve dia.1/4" (6.35)

5/8

21-9/16 (548)

4-9/32 2-5/32

6-3/32

Unit : inch (mm) (852-0-0010-12700-0)

Outdoor Unit CU-KE18NKU

23-15/16 5-11/32

1-3/8

11-17/32

ID:23/32

34-21/32(880)

4-ID:15/16

15/32

2-17/32

12-7/32

11-7/32(285)

13-5/32

Wide tube service valve dia.1/2" (12.70)

Narrow tube service valve dia.1/4" (6.35)

1-13/16

23/32

2-13/32

26-3/8(670)

6-17/32

4-3/8 2-5/32

3/32

5-23/32

Unit : inch (mm) (852-0-0010-13200-0)

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Indoor Unit CS-KE12NB41 & CZ-18BT1U Outdoor Unit CU-KE12NK1

Indoor unit Outdoor unit

Heat exchanger

Strainer

Wide tube

O.D. 3/8" (9.52 mm)

Narrow tube

O.D. 1/4" (6.35 mm)

Wide tube service valve

Muffler

Narrow tube service valve

Strainer

4-way valve

Muffler

Accumulator

High pressure

switch

H.P.

Electric

expansion

valve

Capillary tube for split flow

Compressor

Heat exchanger

Cooling cycle (Defrosting cycle)

Heating cycle

Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU

Indoor unit Outdoor unit

Heat exchanger

Strainer

Wide tube

O.D.

1/2"

(12.7mm)

Narrow tube

O.D. 1/4" (6.35 mm)

Wide tube service valve

Muffler

Narrow tube service valve

Strainer

4-way valve

Accumulator

High pressure

switch

H.P.

Electric

expansion

valve

Capillary tube for split flow

Compressor

Heat exchanger

Cooling cycle (Defrosting cycle)

Heating cycle

5. PERFORMANCE DATA

5-1. Temperature Charts

Indoor Unit CS-KE12NB41 & CZ-18BT1U Outdoor Unit CU-KE12NK1

Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V)

(1) Low pressure performance chart

Hi FanLo Fan

131

(0.9)

psig(MPaG)

102

(0.7)

Low pressure at wide tube service valve

(0.5)

(2) Operating current performance chart

Indoor Air Temp.86°F (30°C)

Indoor Air Temp.86

F (27

80°F (27°C)

75°F (24°C)

(25)

(30)

Outdoor inlet air DB temp. °F(°C)

Hi FanLo Fan

Indoor Air Temp.86°F (30°C)

Indoor Air Temp.86

(35)

F (30

F (27

80°F (27°C)

75°F (24°C)

104

(40)

Operating current (A)

(25)

(30)

(35)

104

(40)

Outdoor inlet air DB temp. °F(°C)

(3) Indoor discharge air performance chart

(20)

(15)

(10)

41 (5)

Indoor discharge air temperature °F(°C)

(0)

(25)

Outdoor inlet air DB temp.

NOTE

Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

Hi FanLo Fan

F (30

Indoor Air Temp.86°F (30°C)

Indoor Air Temp.86

80°F (27°C)

75°F (24°C)

(30)

F (27

(35)

°F(°C)

104

(40)

Indoor Unit CS-KE12NB41 & CZ-18BT1U Outdoor Unit CU-KE12NK1

Heating Characteristics (RH : 85%, Indoor fan speed : High fan) (60Hz, 115V)

(1) High pressure performance chart

(2) Operating current performance chart

508

(3.5)

435

psig(MPaG)

(3.0)

Indoor Air Temp.73°F (23°C)

363

(2.5)

290

(2.0)

218

High pressure at wide tube service valve

(1.5)

(

70°F (21°C)

63°F (17°C)

5)32(0)41(5)50(10)59(15)68(20)77(25)

Outdoor inlet air DB temp. °F(°C)

Operating current (A)

(

(3) Indoor discharge air performance chart

131 (55)

122 (50)

113 (45)

104 (40)

(35)

(30)

(25)

Indoor discharge air temperature °F(°C)

(20)

(

Indoor Air Temp.73°F (23°C)

70°F (21°C)

63°F (17°C)

5)32(0)41(5)50(10)59(15)68(20)77(25)

Outdoor inlet air DB temp. °F(°C)

Indoor Air Temp.73°F (23°C)

70°F (21°C)

63°F (17°C)

5)32(0)41(5)50(10)59(15)68(20)77(25)

Outdoor inlet air DB temp. °F(°C)

NOTE

Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to "8-2. Protective Functions Overload prevention during heating.")

Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU

Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V)

(1) Low pressure performance chart

Hi FanLo Fan

131

(0.9)

psig(MPaG)

102

(0.7)

Low pressure at wide tube service valve

(0.5)

(2) Operating current performance chart

Indoor Air

Indoor Air Temp.86

(25)

(30)

Outdoor inlet air DB temp. °F(°C)

Hi FanLo Fan

Indoor Air

Indoor Air Temp

Temp.86°F (30°C)

F (27

80°F (27°C)

75°F (24°C)

(35)

Temp.86°F (30°C)

F (30

.86

F (27

80°F (27°C)

75°F (24°C)

104

(40)

Operating current (A)

(25)

(30)

(35)

104

(40)

Outdoor inlet air DB temp. °F(°C)

(3) Indoor discharge air performance chart

(20)

(15)

(10)

41 (5)

Indoor discharge air temperature °F(°C)

(0)

(25)

Outdoor inlet air DB temp. °F(°C)

NOTE

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

Hi FanLo Fan

Indoor Air

Indoor Air Temp.86

(30)

Temp.86°F (30°C)

F (27

80°F (27°C)

75°F (24°C)

(35)

F (30

104

(40)

Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU

Heating Characteristics (RH : 85%, Indoor fan speed : High fan) (60Hz, 230V)

(1) High pressure performance chart

(2) Operating current performance chart

508

(3.5)

435

psig(MPaG)

(3.0)

Indoor Air Temp.73°F (23°C)

70°F (21°C)

363

(2.5)

290

(2.0)

218

High pressure at wide tube service valve

(1.5)

(

63°F (17°C)

5)32(0)41(5)50(10)59(15)68(20)77(25)

Outdoor inlet air DB temp. °F(°C)

Operating current (A)

(

(3) Indoor discharge air performance chart

131 (55)

122 (50)

113 (45)

104 (40)

(35)

(30)

(25)

Indoor discharge air temperature °F(°C)

(20)

(

Indoor Air Temp.73°F (23°C)

70°F (21°C)

63°F (17°C)

5)32(0)41(5)50(10)59(15)68(20)77(25)

Outdoor inlet air DB temp. °F(°C)

Indoor Air Temp.73°F (23°C)

70°F (21°C)

63°F (17°C)

5)32(0)41(5)50(10)59(15)68(20)77(25)

Outdoor inlet air DB temp. °F(°C)

NOTE

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

• Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to "8-2. Protective Functions Overload prevention during heating.")

5-2. Cooling Capacity

Indoor Unit : CS-KE12NB41 & CZ-18BT1U

Outdoor Unit : CU-KE12NK1

Power Supply : 115V Single Phase 60Hz

< Cooling Capacity >

RATING CAPACITY: 11,900 BTU/h AIR FLOW RATE: 235 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 65 75 85 95 105 115

59 76 (24.4) SHC 7,210 7,300 7,440 7,480 7,660 6,930

(15.0) 80 (26.7) SHC 8,120 8,210 8,350 8,400 8,530 7,830

63 76 (24.4) SHC 7,940 7,800 7,710 7,570 7,070 5,840

(17.2) 80 (26.7) SHC 8,850 8,720 8,580 8,490 7,980 6,750

67 76 (24.4) SHC 6,660 6,570 6,480 6,380 5,880 4,740

(19.4) 80 (26.7) SHC 7,570 7,480 7,390 7,300 6,750 5,650

71 76 (24.4) SHC 5,330 5,290 5,200 5,150 4,560 3,550

(21.7) 80 (26.7) SHC 6,250 6,200 6,110 6,060 5,470 4,460

F (oC) AMBIENT TEMP. oF (oC)

TC 8,350 8,570 8,800 8,930 9,210 7,830

72 (22.2) SHC 6,340 6,430 6,570 6,610 6,800 6,060

84 (28.9) SHC 8,350 8,570 8,800 8,930 9,210 7,830 88 (31.1) SHC 8,350 8,570 8,800 8,930 9,210 7,830

TC 12,230 12,030 11,790 11,580 10,580 7,950

72 (22.2) SHC 7,070 6,930 6,840 6,700 6,200 4,970

84 (28.9) SHC 9,720 9,590 9,450 9,360 8,850 7,620 88 (31.1) SHC 10,590 10,450 10,360 10,230 9,720 7,950

TC 12,460 12,290 12,070 # 11,900 10,700 8,040

72 (22.2) SHC 5,790 5,700 5,610 5,520 4,970 3,870

84 (28.9) SHC 8,440 8,350 8,260 8,170 7,620 6,520 88 (31.1) SHC 9,310 9,220 9,130 9,040 8,490 7,390

TC 12,640 12,490 12,300 12,170 10,770 8,100

72 (22.2) SHC 4,460 4,420 4,330 4,280 3,690 2,680

84 (28.9) SHC 7,120 7,070 6,980 6,930 6,340 5,330 88 (31.1) SHC 7,980 7,940 7,850 7,800 7,210 6,200

TC 12,730 12,610 12,450 12,370 10,780 8,120

(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)

0.79 0.93 1.06 1.16 1.25 1.07

0.80 0.94 1.08 1.18 1.25 1.07

0.82 0.96 1.10 1.20 1.25 1.07

0.84 0.98 1.13 1.22 1.25 1.07

75 76 (24.4) SHC 4,050 4,010 3,960 3,920 3,370 2,450

(23.9) 80 (26.7) SHC 4,970 4,920 4,880 4,830 4,280 3,370

84 (28.9) SHC 5,840 5,790 5,740 5,700 5,150 4,240 88 (31.1) SHC 6,700 6,660 6,610 6,570 6,020 5,100

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

Rating conditions (#)

: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB : Outdoor Ambient Temp. 95 °F (35 °C) DB

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

Indoor Unit : CS-KE18NB4UW & CZ-18BT1U

Outdoor Unit : CU-KE18NKU

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity >

RATING CAPACITY: 17,500 BTU/h AIR FLOW RATE: 341 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 65 75 85 95 105 115

59 76 (24.4) SHC 10,330 10,470 10,600 10,730 10,930 9,010

(15.0) 80 (26.7) SHC 11,590 11,720 11,860 11,990 12,190 9,520

63 76 (24.4) SHC 11,590 11,390 11,190 11,000 9,540 7,480

(17.2) 80 (26.7) SHC 12,850 12,650 12,450 12,260 10,800 8,740

67 76 (24.4) SHC 9,870 9,740 9,540 9,340 7,880 6,020

(19.4) 80 (26.7) SHC 11,130 10,930 10,800 10,600 9,070 7,280

71 76 (24.4) SHC 7,950 7,880 7,750 7,610 6,090 4,430

(21.7) 80 (26.7) SHC 9,210 9,140 9,010 8,870 7,350 5,690

75 76 (24.4) SHC 6,160 6,090 5,960 5,890 4,430 2,970

(23.9) 80 (26.7) SHC 7,420 7,350 7,220 7,150 5,690 4,230

F (oC) AMBIENT TEMP. oF (oC)

(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)

TC 12,260 12,550 12,830 13,060 13,460 9,520

72 (22.2) SHC 9,140 9,270 9,400 9,540 9,740 7,810

84 (28.9) SHC 12,260 12,550 12,830 13,060 13,380 9,520 88 (31.1) SHC 12,260 12,550 12,830 13,060 13,460 9,520

TC 18,110 17,790 17,400 17,000 14,080 9,650

72 (22.2) SHC 10,400 10,200 10,000 9,800 8,340 6,290

84 (28.9) SHC 14,040 13,850 13,650 13,450 11,990 9,650 88 (31.1) SHC 15,240 15,110 14,840 14,640 13,180 9,650

TC 18,510 18,220 17,860 # 17,500 14,220 9,750

72 (22.2) SHC 8,680 8,480 8,340 8,140 6,620 4,830

84 (28.9) SHC 12,320 12,190 11,990 11,790 10,330 8,480 88 (31.1) SHC 13,510 13,380 13,180 12,980 11,530 9,670

TC 18,820 18,570 18,260 17,940 14,290 9,810

72 (22.2) SHC 6,750 6,690 6,550 6,420 4,900 3,240

84 (28.9) SHC 10,470 10,330 10,200 10,070 8,540 6,890 88 (31.1) SHC 11,660 11,530 11,390 11,260 9,740 8,080

TC 19,010 18,800 18,530 18,260 14,280 9,810

84 (28.9) SHC 8,610 8,540 8,410 8,340 6,890 5,430 88 (31.1) SHC 9,800 9,740 9,670 9,540 8,080 6,620

1.15 1.34 1.54 1.72 1.67 1.30

1.17 1.37 1.57 1.75 1.67 1.30

1.19 1.40 1.60 1.79 1.67 1.30

1.22 1.43 1.64 1.83 1.67 1.30

1.25 1.46 1.68 1.87 1.67 1.30

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

Rating conditions (#)

: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB : Outdoor Ambient Temp. 95 °F (35 °C) DB

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

5-3. Cooling Capacity (Low Ambient)

Indoor Unit : CS-KE12NB41 & CZ-18BT1U

Outdoor Unit : CU-KE12NK1

Power Supply : 115V Single Phase 60Hz

< Cooling Capacity (Low Ambient) >

RATING CAPACITY: 11,900 BTU/h AIR FLOW RATE: 235 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 0 5 15 25 35 45 55

59 76 (24.4) SHC 7,800 7,800 7,850 9,450 7,850 7,850 7,850

(15.0) 80 (26.7) SHC 8,720 8,720 8,720 9,590 8,760 8,760 8,760

63 76 (24.4) SHC 6,520 6,520 6,570 9,450 6,610 6,610 6,660

(17.2) 80 (26.7) SHC 7,440 7,440 7,480 9,590 7,530 7,530 7,530

67 76 (24.4) SHC 5,240 5,240 5,290 9,450 5,380 5,420 5,420

(19.4) 80 (26.7) SHC 6,160 6,160 6,200 9,530 6,290 6,340 6,340

71 76 (24.4) SHC 3,870 3,920 3,960 9,380 4,100 4,140 4,140

(21.7) 80 (26.7) SHC 4,780 4,830 4,880 9,380 5,010 5,060 5,060

75 76 (24.4) SHC 2,590 2,640 2,730 9,160 2,860 2,910 2,960

(23.9) 80 (26.7) SHC 3,500 3,550 3,640 9,160 3,780 3,820 3,870

F (oC) AMBIENT TEMP. oF (oC)

(-17.8) (-15.0) (-9.4) (-3.9) (1.7) (7.2) (12.8)

TC 9,530 9,550 9,560 9,590 9,600 9,590 9,570

72 (22.2) SHC 6,930 6,930 6,980 8,580 6,980 6,980 6,980

84 (28.9) SHC 9,530 9,550 9,560 9,590 9,600 9,590 9,570 88 (31.1) SHC 9,530 9,550 9,560 9,590 9,600 9,590 9,570

TC 9,440 9,460 9,530 9,590 9,650 9,660 9,670

72 (22.2) SHC 5,650 5,650 5,700 8,580 5,740 5,740 5,790

84 (28.9) SHC 8,300 8,300 8,350 9,590 8,400 8,400 8,400 88 (31.1) SHC 9,170 9,170 9,220 9,590 9,270 9,270 9,270

TC 9,250 9,290 9,410 9,530 9,620 9,670 9,720

72 (22.2) SHC 4,370 4,370 4,420 8,580 4,510 4,560 4,560

84 (28.9) SHC 7,020 7,020 7,070 9,530 7,160 7,210 7,210 88 (31.1) SHC 7,890 7,890 7,940 9,530 8,030 8,080 8,080

TC 8,950 9,010 9,210 9,380 9,520 9,610 9,710

72 (22.2) SHC 3,000 3,050 3,090 8,580 3,230 3,280 3,280

84 (28.9) SHC 5,650 5,700 5,740 9,380 5,880 5,930 5,930 88 (31.1) SHC 6,520 6,570 6,610 9,380 6,750 6,800 6,800

TC 8,590 8,650 8,930 9,160 9,360 9,480 9,620

84 (28.9) SHC 4,370 4,420 4,510 9,160 4,650 4,690 4,740 88 (31.1) SHC 5,240 5,290 5,380 9,160 5,520 5,560 5,610

0.47 0.50 0.47 0.46 0.46 0.51 0.55

0.53 0.56 0.51 0.49 0.49 0.53 0.57

0.61 0.63 0.57 0.54 0.52 0.56 0.59

0.68 0.71 0.63 0.58 0.56 0.60 0.62

0.76 0.79 0.69 0.63 0.60 0.63 0.64

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

2. Above data represents the value when the operation frequency of a compressor is fixed.

Indoor Unit : CS-KE18NB4UW & CZ-18BT1U

Outdoor Unit : CU-KE18NKU

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity (Low Ambient) >

RATING CAPACITY: 17,500 BTU/h AIR FLOW RATE: 341 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 0 5 15 25 35 45 55

59 76 (24.4) SHC 10,930 10,930 10,930 13,050 11,000 11,000 11,000

(15.0) 80 (26.7) SHC 12,190 12,190 12,190 13,470 12,190 12,260 12,190

63 76 (24.4) SHC 9,140 9,140 9,210 13,050 9,270 9,270 9,340

(17.2) 80 (26.7) SHC 10,400 10,400 10,400 13,480 10,530 10,530 10,600

67 76 (24.4) SHC 7,280 7,350 7,420 13,050 7,550 7,610 7,680

(19.4) 80 (26.7) SHC 8,540 8,610 8,680 13,380 8,810 8,870 8,870

71 76 (24.4) SHC 5,430 5,490 5,560 13,050 5,760 5,820 5,890

(21.7) 80 (26.7) SHC 6,690 6,690 6,820 13,160 7,020 7,080 7,150

75 76 (24.4) SHC 3,640 3,700 3,770 12,850 4,030 4,170 4,230

(23.9) 80 (26.7) SHC 4,900 4,960 5,030 12,850 5,290 5,360 5,490

F (oC) AMBIENT TEMP. oF (oC)

(-17.8) (-15.0) (-9.4) (-3.9) (1.7) (7.2) (12.8)

TC 13,400 13,430 13,440 13,470 13,500 13,520 13,510

72 (22.2) SHC 9,740 9,740 9,740 11,860 9,740 9,800 9,800

84 (28.9) SHC 13,380 13,380 13,380 13,470 13,380 13,450 13,450 88 (31.1) SHC 13,400 13,430 13,440 13,470 13,500 13,520 13,510

TC 13,260 13,300 13,370 13,480 13,560 13,640 13,670

72 (22.2) SHC 7,950 7,950 7,950 11,860 8,080 8,080 8,140

84 (28.9) SHC 11,590 11,590 11,590 13,480 11,720 11,720 11,790 88 (31.1) SHC 12,790 12,790 12,850 13,480 12,920 12,980 12,980

TC 12,980 13,040 13,170 13,380 13,530 13,670 13,760

72 (22.2) SHC 6,090 6,160 6,220 11,860 6,360 6,420 6,420

84 (28.9) SHC 9,740 9,800 9,870 13,380 10,000 10,070 10,070 88 (31.1) SHC 11,000 11,000 11,060 13,380 11,190 11,260 11,330

TC 12,550 12,630 12,830 13,160 13,390 13,600 13,750

72 (22.2) SHC 4,230 4,230 4,370 11,860 4,570 4,630 4,700

84 (28.9) SHC 7,880 7,950 8,010 13,160 8,210 8,280 8,340 88 (31.1) SHC 9,070 9,140 9,210 13,160 9,400 9,470 9,540

TC 12,010 12,110 12,380 12,850 13,150 13,440 13,650

84 (28.9) SHC 6,090 6,160 6,220 12,850 6,490 6,620 6,690 88 (31.1) SHC 7,280 7,350 7,420 12,850 7,680 7,810 7,880

0.69 0.73 0.76 0.66 0.66 0.66 0.70

0.78 0.82 0.84 0.71 0.70 0.69 0.72

0.89 0.92 0.93 0.78 0.75 0.72 0.75

1.00 1.03 1.03 0.85 0.80 0.76 0.77

1.11 1.14 1.13 0.92 0.86 0.80 0.80

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

2. Above data represents the value when the operation frequency of a compressor is fixed.

+ 102 hidden pages

Panasonic CS-KE12NB41, CS-KE18NB4UW, CU-KE12NK1, CU-KE18NKU, CZ-18BT1U User Manual

TECHNICAL & SERVICE MANUAL

SAFETY PRECAUTIONS

Table of Contents

1. OPERATING RANGE

2. SPECIFICATIONS

2-1. Unit Specifications

2-2. Major Component Specifications

2-3. Other Component Specifications

3. DIMENSIONAL DATA

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

5. PERFORMANCE DATA

5-1. Temperature Charts

5-2. Cooling Capacity

5-3. Cooling Capacity (Low Ambient)