Panasonic CS-KS18B4UW, CS-KS12NB41, CU-KS12NK1A, CZ-18BT1U User Manual

TECHNICAL & SERVICE MANUAL

CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Indoor Model No.	Product Code No.
Body (Panel)	Body (Panel)
CS-KS12NB41 (CZ-18BT1U)	1 852 361 04 (1 852 361 15)
CS-KS18NB4UW (CZ-18BT1U)	1 852 361 06 (1 852 361 15)

Outdoor Model No. Product Code No.

CU-KS18NKU	1 852 361 18
CU-KS12NK1A	1 852 361 16
CU-KS18NKUA	1 852 361 19

Indoor Unit		Outdoor Unit

Body

Panel
CS-KS12NB41 (Body) & CZ-18BT1U (Panel)
CS-KS18NB4UW (Body) & CZ-18BT1U (Panel)	CU-KS12NK1A

Remote Controller

CU-KS18NKU

Wired Remote Controller CU-KS18NKUA

(Option)

REFERENCE NO. SM700879

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.

Prohibit

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.

Prohibit

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.

Prohibit

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.

2

Warning

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

Prohibit

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."	Prohibit

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

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

Prohibit

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.

Prohibit

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.

3

		Table of Contents
			Page
	SAFETY PRECAUTIONS ..............................................................................................................		2
TABLE OF CONTENTS .....................................................................................................................			4
1.	OPERATING RANGE ...................................................................................................................		6
2.	SPECIFICATIONS
	2-1.	Unit Specifications .............................................................................................................	7
	2-2.	Major Component Specifications .......................................................................................	17
	2-3.	Other Component Specifications .......................................................................................	22
3.	DIMENSIONAL DATA.....................................................................................................................		23
4.	REFRIGERANT FLOW DIAGRAM
	4-1.	Refrigerant Flow Diagram ...................................................................................................	26
5.	PERFORMANCE DATA
	5-1.	Temperature Charts ............................................................................................................	28
	5-2.	Cooling Capacity ................................................................................................................	30
	5-3. Cooling Capacity (Low Ambient) .........................................................................................		32
6.	ELECTRICAL DATA
	6-1.	Electrical Characteristics ....................................................................................................	34
	6-2.	Electric Wiring Diagrams ....................................................................................................	36
7.	MAINTENANCE
	7-1. Address Setting of the Remote Control Unit .......................................................................		39
	7-2. Disconnecting and Connecting Positive Connector for Outdoor Unit ..................................		40
	7-3.	Disassembly Procedure ......................................................................................................	41
8.	FUNCTIONS
	8-1.	Operation Functions ...........................................................................................................	48
	8-2.	Protective Functions ...........................................................................................................	50
9. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)
	9-1. Precautions before Performing Inspection or Repair ...........................................................		51
	9-2.	Method of Self-Diagnostics .................................................................................................	51
	9-3. Checking the Indoor and Outdoor Units ..............................................................................		53
	9-4. Trouble Diagnosis of Fan Motor ...........................................................................................		57
	9-5.	Noise Malfunction and Electromagnetic Interference ..........................................................	59

4

			Page
10. CHECKING ELECTRICAL COMPONENTS
10-1. Measurement of Insulation Resistance ...............................................................................			60
10-2. Checking Continuity of Fuse on PCB Ass'y .........................................................................			61
11. REFRIGERANT R410A:
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
11-1. Characteristics of New Refrigerant R410A .........................................................................			62
11-2.	Checklist before Servicing ...................................................................................................		63
11-3. Tools Specifically for R410A ................................................................................................			64
11-4.	Tubing Installation Procedures ............................................................................................		64
11-5. In Case of Compressor Malfunction ....................................................................................			65
11-6. In Case Refrigerant is Leaking ............................................................................................			67
11-7.	Charging Additional Refrigerant ..........................................................................................		68
11-8.	Retro-Fitting Existing Systems ............................................................................................		68
		Operating Instructions
APPENDIX A			A-1
		CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
		CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
		(CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA )
APPENDIX B		INSTALLATION INSTRUCTIONS .............................................................................	A-2
		CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
		CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
		(CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA )
APPENDIX C		Operating Instructions ............................................................................................	A-3
		(CZ-RD515U)
APPENDIX D		INSTALLATION INSTRUCTIONS .............................................................................	A-4
		(CZ-RD515U)

5

1. OPERATING RANGE

Models : CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU

		Temperature	Indoor Air Intake Temp.	Outdoor Air Intake Temp.
	Cooling	Maximum	95 °F DB / 71 °F WB	115 °F DB
		Minimum	67 °F DB / 57 °F WB	67 °F DB

Models : CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A

CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA

		Temperature	Indoor Air Intake Temp.	Outdoor Air Intake Temp.
	Cooling	Maximum	95 °F DB / 71 °F WB	115 °F DB
		Minimum	67 °F DB / 57 °F WB	0 °F DB

6

2. SPECIFICATIONS

2-1.		Unit Specifications
2-1-1.		Indoor Unit	CS-KS18NB4UW & CZ-18BT1U
		Outdoor Unit	CU-KS18NKU					< 230V >
Voltage Rating							230V Single-Phase 60Hz
								Cooling
Performance
	Air Circulation (Hi/Me/Lo)				ft3/min (m3/h)		341 (579) / 294 (500) / 253 (430)
	Total Capacity					BTU/h	17,500	( 4,000 to 17,500 )
						kW	5.15	( 1.2 to 5.15 )
	Sensible Capacity					BTU/h		10,600
	Latent Capacity					BTU/h		6,900
	Moisture Removal (High)					Pints/h		4.89
	Available Voltage Range					V		187 to 253
Rating	Running Amperes					A	8.3	( 1.2 to 8.3 )
	Power Input					W	1,860	( 250 to 1,860 )
Electrical	Power Factor				%			97
	Compressor Locked Rotor Amperes					A		17.5
	EER					BTU/h/W		9.41
	SEER					BTU/Wh		16
	Fuse or Circuit Breaker Capacity					A		15
	Controls / Temperature Control						Microprocessor / I.C. Thermister
	Control Unit						Wireless Remote Control Unit
	Timer						24-Hour ON or OFF Timer, 1-Hour OFF Timer
	Fan Speeds			Indoor / Outdoor			Auto and 3 steps / Auto (Hi, Me, Lo)
	Airflow Direction (Indoor)					Horizontal		-
						Vertical		Auto
Features	Air Filter						Washable, Anti-Mold
	Compressor						DC Twin Rotary (Inverter)
	Refrigerant / Amount charged at shipment					Ibs (g)	R410A / 2.87 (1,300)
	Refrigerant Control						Electric Expansion Valve
	Operation Sound			Indoor : Hi/Me/Lo		dB-A		44 / 40 / 36
				Outdoor : Hi		dB-A		51
	Refrigerant Tubing Connections							Flare Type
	Max. allowable tubing length at shipment					ft (m)		25 (7.5)
	Refrigerant			Narrow tube		inch (mm)		1/4 (6.35)
	Tube Diameter			Wide tube		inch (mm)		1/2 (12.7)
	Wired Remote Controller (Option)							CZ-RD515U

7

Indoor Unit		CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit		CU-KS18NKU					< 230V >
					Indoor Unit	Individual Unit
Dimensions & Weight (Indoor Unit)						Body	Panel
					(CS-KS18NB4UW & CZ-18BT1U)
						(CS-KS18NB4UW)	(CZ-18BT1U)
	Unit Dimensions		Height	inch (mm)	12-5/16 (313)	11-5/32 (283)	1-9/16 (40)
			Width	inch (mm)	24-19/32 (625)	22-5/8 (575)	24-19/32 (625)
			Depth	inch (mm)	24-19/32 (625)	22-5/8 (575)	24-19/32 (625)
	Package Dimensions		Height	inch (mm)	-	11-13/32 (290)	4-1/8 (105)
			Width	inch (mm)	-	24-13/16 (630)	26-3/16 (665)
			Depth	inch (mm)	-	28-1/8 (714)	26-11/16 (678)
	Weight		Net	Ib. (kg)	41.3 (18.7)	35.3 (16)	6.0 (2.7)
			Shipping	Ib. (kg)	-	41.9 (19)	7.7 (3.5)
	Shipping Volume			cu.ft (m3)	-	4.59 (0.13)	1.65 (0.04)
Dimensions & Weight (Outdoor Unit)					Outdoor Unit
					(CU-KS18NKU)
	Unit Dimensions		Height	inch (mm)	26-3/8 (670)
			Width	inch (mm)	34-21/32 (880)
			Depth	inch (mm)	11-7/32 (285)
	Package Dimensions		Height	inch (mm)	28-27/32 (733)
			Width	inch (mm)	39-27/32 (1,012)
			Depth	inch (mm)	14-29/32 (379)
	Weight		Net	Ib. (kg)	90.4 (41.0)
			Shipping	Ib. (kg)	99.2 (45.0)
	Shipping Volume			cu.ft (m3)	9.88 (0.28)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks: Rating conditions are:

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

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

8

2-1-2. Indoor Unit		CS-KS18NB4UW & CZ-18BT1U
	Outdoor Unit	CU-KS18NKU					< 208V >
Voltage Rating						208V Single-Phase 60Hz
							Cooling
Performance
	Air Circulation (Hi/Me/Lo)			ft3/min (m3/h)		341 (579) / 294 (500) / 253 (430)
	Total Capacity				BTU/h	17,500	( 4,000 to 17,500 )
					kW	5.15	( 1.2 to 5.15 )
	Sensible Capacity				BTU/h		10,600
	Latent Capacity				BTU/h		6,900
	Moisture Removal (High)				Pints/h		4.89
	Available Voltage Range				V		187 to 253
Rating	Running Amperes				A	9.1	( 1.2 to 9.1 )
	Power Input				W	1,860	( 250 to 1,860 )
Electrical	Power Factor			%			98
	Compressor Locked Rotor Amperes				A		17.5
	EER				BTU/h/W		9.41
	SEER				BTU/Wh		16
	Fuse or Circuit Breaker Capacity				A		15
	Controls / Temperature Control					Microprocessor / I.C. Thermister
	Control Unit					Wireless Remote Control Unit
	Timer					24-Hour ON or OFF Timer, 1-Hour OFF Timer
	Fan Speeds		Indoor / Outdoor			Auto and 3 steps / Auto (Hi, Me, Lo)
	Airflow Direction (Indoor)				Horizontal		-
					Vertical		Auto
Features	Air Filter					Washable, Anti-Mold
	Compressor					DC Twin Rotary (Inverter)
	Refrigerant / Amount charged at shipment				Ibs (g)	R410A / 2.87 (1,300)
	Refrigerant Control					Electric Expansion Valve
	Operation Sound		Indoor : Hi/Me/Lo		dB-A		44 / 40 / 36
			Outdoor : Hi		dB-A		51
	Refrigerant Tubing Connections						Flare Type
	Max. allowable tubing length at shipment				ft (m)		25 (7.5)
	Refrigerant		Narrow tube		inch (mm)		1/4 (6.35)
	Tube Diameter		Wide tube		inch (mm)		1/2 (12.7)
	Wired Remote Controller (Option)						CZ-RD515U

9

Indoor Unit		CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit		CU-KS18NKU					< 208V >
					Indoor Unit	Individual Unit
Dimensions & Weight (Indoor Unit)						Body	Panel
					(CS-KS18NB4UW & CZ-18BT1U)
						(CS-KS18NB4UW)	(CZ-18BT1U)
	Unit Dimensions		Height	inch (mm)	12-5/16 (313)	11-5/32 (283)	1-9/16 (40)
			Width	inch (mm)	24-19/32 (625)	22-5/8 (575)	24-19/32 (625)
			Depth	inch (mm)	24-19/32 (625)	22-5/8 (575)	24-19/32 (625)
	Package Dimensions		Height	inch (mm)	-	11-13/32 (290)	4-1/8 (105)
			Width	inch (mm)	-	24-13/16 (630)	26-3/16 (665)
			Depth	inch (mm)	-	28-1/8 (714)	26-11/16 (678)
	Weight		Net	Ib. (kg)	41.3 (18.7)	35.3 (16)	6.0 (2.7)
			Shipping	Ib. (kg)	-	41.9 (19)	7.7 (3.5)
	Shipping Volume			cu.ft (m3)	-	4.59 (0.13)	1.65 (0.04)
Dimensions & Weight (Outdoor Unit)					Outdoor Unit
					(CU-KS18NKU)
	Unit Dimensions		Height	inch (mm)	26-3/8 (670)
			Width	inch (mm)	34-21/32 (880)
			Depth	inch (mm)	11-7/32 (285)
	Package Dimensions		Height	inch (mm)	28-27/32 (733)
			Width	inch (mm)	39-27/32 (1,012)
			Depth	inch (mm)	14-29/32 (379)
	Weight		Net	Ib. (kg)	90.4 (41.0)
			Shipping	Ib. (kg)	99.2 (45.0)
	Shipping Volume			cu.ft (m3)	9.88 (0.28)
					DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
	Cooling: Indoor air temperature			80 °F DB / 67 °F WB

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

10

2-1-3. Indoor Unit		CS-KS12NB41 & CZ-18BT1U
	Outdoor Unit CU-KS12NK1A
Voltage Rating						115V Single-Phase 60Hz
							Cooling
Performance
	Air Circulation (Hi/Me/Lo)			ft3/min (m3/h)		235 (399) / 206 (350) / 194 (330)
	Total Capacity				BTU/h	11,900	( 3,000 to 11,900 )
					kW	3.5	( 0.9 to 3.5 )
	Sensible Capacity				BTU/h		7,200
	Latent Capacity				BTU/h		4,700
	Moisture Removal (High)				Pints/h		4.26
	Available Voltage Range				V		104 to 126
Rating	Running Amperes				A	12.6	( 2.5 to 12.6 )
	Power Input				W	1,260	( 250 to 1,260 )
Electrical	Power Factor			%			87
	Compressor Locked Rotor Amperes				A		20
	EER				BTU/h/W		9.44
	SEER				BTU/Wh		16
	Fuse or Circuit Breaker Capacity				A		20
	Controls / Temperature Control					Microprocessor / I.C. Thermister
	Control Unit					Wireless Remote Control Unit
	Timer					24-Hour ON or OFF Timer, 1-Hour OFF Timer
	Fan Speeds		Indoor / Outdoor			Auto and 3 steps / Auto (Hi and multi steps)
	Airflow Direction (Indoor)				Horizontal		-
					Vertical		Auto
Features	Air Filter					Washable, Anti-Mold
	Compressor					DC Rotary (Inverter)
	Refrigerant / Amount charged at shipment				Ibs (g)	R410A / 2.43 (1,100)
	Refrigerant Control					Electric Expansion Valve
	Operation Sound		Indoor : Hi/Me/Lo		dB-A		34 / 32 / 31
			Outdoor : Hi		dB-A		47
	Refrigerant Tubing Connections						Flare Type
	Max. allowable tubing length at shipment				ft (m)		25 (7.5)
	Refrigerant		Narrow tube		inch (mm)		1/4 (6.35)
	Tube Diameter		Wide tube		inch (mm)		3/8 (9.52)
	Wired Remote Controller (Option)						CZ-RD515U

11

Indoor Unit		CS-KS12NB41 & CZ-18BT1U
Outdoor Unit CU-KS12NK1A
					Indoor Unit		Individual Unit
Dimensions & Weight (Indoor Unit)							Body	Panel
					(CS-KS12NB41 & CZ-18BT1U)
							(CS-KS12NB41)	(CZ-18BT1U)
	Unit Dimensions		Height	inch (mm)	12-5/16 (313)		11-5/32 (283)	1-9/16 (40)
			Width	inch (mm)	24-19/32 (625)		22-5/8 (575)	24-19/32 (625)
			Depth	inch (mm)	24-19/32 (625)		22-5/8 (575)	24-19/32 (625)
	Package Dimensions		Height	inch (mm)	-		11-13/32 (290)	4-1/8 (105)
			Width	inch (mm)	-		24-13/16 (630)	26-3/16 (665)
			Depth	inch (mm)	-		28-1/8 (714)	26-11/16 (678)
	Weight		Net	Ib. (kg)	41.3 (18.7)		35.3 (16)	6.0 (2.7)
			Shipping	Ib. (kg)	-		41.9 (19)	7.7 (3.5)
	Shipping Volume			cu.ft (m3)	-		4.59 (0.13)	1.65 (0.04)
Dimensions & Weight (Outdoor Unit)						Outdoor Unit
						(CU-KS12NK1A)
	Unit Dimensions		Height	inch (mm)		21-9/16 (548)
			Width	inch (mm)		28-11/32 (720)
			Depth	inch (mm)		10-7/16 (265)
	Package Dimensions		Height	inch (mm)		23-15/32 (596)
			Width	inch (mm)		34-3/32 (866)
			Depth	inch (mm)		14-1/2 (368)
	Weight		Net	Ib. (kg)		75.0 (34.0)
			Shipping	Ib. (kg)		81.6 (37.0)
	Shipping Volume			cu.ft (m3)		6.35 (0.18)
					DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
	Cooling: Indoor air temperature			80 °F DB / 67 °F WB

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

12

2-1-4. Indoor Unit		CS-KS18NB4UW & CZ-18BT1U
	Outdoor Unit CU-KS18NKUA						< 230V >
Voltage Rating						230V Single-Phase 60Hz
							Cooling
Performance
	Air Circulation (Hi/Me/Lo)			ft3/min (m3/h)		341 (579) / 294 (500) / 253 (430)
	Total Capacity				BTU/h	17,500	( 4,000 to 17,500 )
					kW	5.15	( 1.2 to 5.15 )
	Sensible Capacity				BTU/h		10,600
	Latent Capacity				BTU/h		6,900
	Moisture Removal (High)				Pints/h		4.89
	Available Voltage Range				V		187 to 253
Rating	Running Amperes				A	8.3	( 1.2 to 8.3 )
	Power Input				W	1,860	( 250 to 1,860 )
Electrical	Power Factor			%			97
	Compressor Locked Rotor Amperes				A		17.5
	EER				BTU/h/W		9.41
	SEER				BTU/Wh		16
	Fuse or Circuit Breaker Capacity				A		15
	Controls / Temperature Control					Microprocessor / I.C. Thermister
	Control Unit					Wireless Remote Control Unit
	Timer					24-Hour ON or OFF Timer, 1-Hour OFF Timer
	Fan Speeds		Indoor / Outdoor			Auto and 3 steps / Auto (Hi and multi steps)
	Airflow Direction (Indoor)				Horizontal		-
					Vertical		Auto
Features	Air Filter					Washable, Anti-Mold
	Compressor					DC Twin Rotary (Inverter)
	Refrigerant / Amount charged at shipment				Ibs (g)	R410A / 2.87 (1,300)
	Refrigerant Control					Electric Expansion Valve
	Operation Sound		Indoor : Hi/Me/Lo		dB-A		44 / 40 / 36
			Outdoor : Hi		dB-A		51
	Refrigerant Tubing Connections						Flare Type
	Max. allowable tubing length at shipment				ft (m)		25 (7.5)
	Refrigerant		Narrow tube		inch (mm)		1/4 (6.35)
	Tube Diameter		Wide tube		inch (mm)		1/2 (12.7)
	Wired Remote Controller (Option)						CZ-RD515U

13

Indoor Unit		CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKUA							< 230V >
					Indoor Unit	Individual Unit
Dimensions & Weight (Indoor Unit)						Body	Panel
					(CS-KS18NB4UW & CZ-18BT1U)
						(CS-KS18NB4UW)	(CZ-18BT1U)
	Unit Dimensions		Height	inch (mm)	12-5/16 (313)	11-5/32 (283)	1-9/16 (40)
			Width	inch (mm)	24-19/32 (625)	22-5/8 (575)	24-19/32 (625)
			Depth	inch (mm)	24-19/32 (625)	22-5/8 (575)	24-19/32 (625)
	Package Dimensions		Height	inch (mm)	-	11-13/32 (290)	4-1/8 (105)
			Width	inch (mm)	-	24-13/16 (630)	26-3/16 (665)
			Depth	inch (mm)	-	28-1/8 (714)	26-11/16 (678)
	Weight		Net	Ib. (kg)	41.3 (18.7)	35.3 (16)	6.0 (2.7)
			Shipping	Ib. (kg)	-	41.9 (19)	7.7 (3.5)
	Shipping Volume			cu.ft (m3)	-	4.59 (0.13)	1.65 (0.04)
Dimensions & Weight (Outdoor Unit)					Outdoor Unit
					(CU-KS18NKUA)
	Unit Dimensions		Height	inch (mm)	26-3/8 (670)
			Width	inch (mm)	34-21/32 (880)
			Depth	inch (mm)	11-7/32 (285)
	Package Dimensions		Height	inch (mm)	28-27/32 (733)
			Width	inch (mm)	39-27/32 (1,012)
			Depth	inch (mm)	14-29/32 (379)
	Weight		Net	Ib. (kg)	90.4 (41.0)
			Shipping	Ib. (kg)	99.2 (45.0)
	Shipping Volume			cu.ft (m3)	9.88 (0.28)
					DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
	Cooling: Indoor air temperature			80 °F DB / 67 °F WB

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

14

2-1-5. Indoor Unit		CS-KS18NB4UW & CZ-18BT1U
	Outdoor Unit CU-KS18NKUA						< 208V >
Voltage Rating						208V Single-Phase 60Hz
Performance							Cooling
	Total Capacity				BTU/h	17,500	( 4,000 to 17,500 )
	Air Circulation (Hi/Me/Lo)			ft3/min (m3/h)		341 (579) / 294 (500) / 253 (430)
					kW	5.15	( 1.2 to 5.15 )
	Sensible Capacity				BTU/h		10,600
	Latent Capacity				BTU/h		6,900
	Moisture Removal (High)				Pints/h		4.89
Rating	Available Voltage Range				V		187 to 253
	Running Amperes				A	9.1	( 1.2 to 9.1 )
	Power Input				W	1,860	( 250 to 1,860 )
Electrical	Power Factor			%			98
	Compressor Locked Rotor Amperes				A		17.5
	EER				BTU/h/W		9.41
	SEER				BTU/Wh		16
	Fuse or Circuit Breaker Capacity				A		15
	Controls / Temperature Control					Microprocessor / I.C. Thermister
	Control Unit					Wireless Remote Control Unit
	Timer					24-Hour ON or OFF Timer, 1-Hour OFF Timer
	Fan Speeds		Indoor / Outdoor			Auto and 3 steps / Auto (Hi and multi steps)
	Airflow Direction (Indoor)				Horizontal		-
					Vertical		Auto
Features	Air Filter					Washable, Anti-Mold
	Refrigerant Control					Electric Expansion Valve
	Compressor					DC Twin Rotary (Inverter)
	Refrigerant / Amount charged at shipment				Ibs (g)	R410A / 2.87 (1,300)
	Operation Sound		Indoor : Hi/Me/Lo		dB-A		44 / 40 / 36
			Outdoor : Hi		dB-A		51
	Refrigerant Tubing Connections						Flare Type
	Max. allowable tubing length at shipment				ft (m)		25 (7.5)
	Refrigerant		Narrow tube		inch (mm)		1/4 (6.35)
	Tube Diameter		Wide tube		inch (mm)		1/2 (12.7)
	Wired Remote Controller (Option)						CZ-RD515U

15

Indoor Unit		CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKUA							< 208V >
					Indoor Unit	Individual Unit
Dimensions & Weight (Indoor Unit)						Body	Panel
					(CS-KS18NB4UW & CZ-18BT1U)
						(CS-KS18NB4UW)	(CZ-18BT1U)
	Unit Dimensions		Height	inch (mm)	12-5/16 (313)	11-5/32 (283)	1-9/16 (40)
			Width	inch (mm)	24-19/32 (625)	22-5/8 (575)	24-19/32 (625)
			Depth	inch (mm)	24-19/32 (625)	22-5/8 (575)	24-19/32 (625)
	Package Dimensions		Height	inch (mm)	-	11-13/32 (290)	4-1/8 (105)
			Width	inch (mm)	-	24-13/16 (630)	26-3/16 (665)
			Depth	inch (mm)	-	28-1/8 (714)	26-11/16 (678)
	Weight		Net	Ib. (kg)	41.3 (18.7)	35.3 (16)	6.0 (2.7)
			Shipping	Ib. (kg)	-	41.9 (19)	7.7 (3.5)
	Shipping Volume			cu.ft (m3)	-	4.59 (0.13)	1.65 (0.04)
Dimensions & Weight (Outdoor Unit)					Outdoor Unit
					(CU-KS18NKUA)
	Unit Dimensions		Height	inch (mm)	26-3/8 (670)
			Width	inch (mm)	34-21/32 (880)
			Depth	inch (mm)	11-7/32 (285)
	Package Dimensions		Height	inch (mm)	28-27/32 (733)
			Width	inch (mm)	39-27/32 (1,012)
			Depth	inch (mm)	14-29/32 (379)
	Weight		Net	Ib. (kg)	90.4 (41.0)
			Shipping	Ib. (kg)	99.2 (45.0)
	Shipping Volume			cu.ft (m3)	9.88 (0.28)
					DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
	Cooling: Indoor air temperature			80 °F DB / 67 °F WB

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

16

2-2. Major Component Specifications

2-2-1. Indoor Unit

Indoor Unit (Body)			CS-KS12NB41
Control PCB
	Part No.						CB-CS-KS12NB4U
	Controls						Microprocessor
	Control Circuit Fuse						250V 3A
Fan
	Type						Turbo
	Q'ty ... Dia. and Length				inch (mm)		1 ... D12-5/8 / L5-3/4 (D322/L147)
Fan Motor
	Type						DC Motor
	Model ... Q'ty						SIC-62FW-D866-2 ... 1
	No. of Poles						8
	Rough Measure RPM (Cool)						470
	Rating		Voltage / Nominal Output				DC160V / 23W
	Coil Resistance					Ohm	-
	(Ambient Temp. 68 °F (20 °C))
	Safety Device
		Type					Internal Controller
		OverCurrent Protection					Yes
		OverHeat Protection					Yes
	Run Capacitor					Micro F	-
						VAC	-
Drain Pump
	Model ... Q'ty						PLD-12115ST-1 ... 1
	Rating			Voltage, Hz			AC115V, 60Hz
				Input		W	10.8
	Coil Resistance					Ohm	101 +/- 10%
	(Ambient Temp. 68 °F (20 °C))
	Safty Device			Type			Thermal Fuse
				Open		°F (°C)	293 (145)
Heat Exchanger Coil
	Coil						Aluminum Plate Fin / Copper Tube
	Rows						2
	Fins per inch						18.1
	Face Area					ft2 (m2)	2.94 (0.273)
							DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Indoor Unit (Panel)			CZ-18BT1U
Flap Motor
	Type						Stepping Motor
	Model ... Q'ty						MP24ZN-12V ... 2
	Rating						DC 12V
	Coil Resistance					Ohm	Each Pair of Terminal : 380 +/- 7%
	(Ambient Temp. 77 °F (25 °C))
							DATA SUBJECT TO CHANGE WITHOUT NOTICE.

17

Indoor Unit (Body)			CS-KS18NB4UW
Control PCB
	Part No.						CB-CS-KS18NB4U
	Controls						Microprocessor
	Control Circuit Fuse						250V 3A
Fan
	Type						Turbo
	Q'ty ... Dia. and Length				inch (mm)		1 ... D12-5/8 / L5-3/4 (D322/L147)
Fan Motor
	Type						DC Motor
	Model ... Q'ty						SIC-62FW-D866-2 ... 1
	No. of Poles						8
	Rough Measure RPM (Cool)						650
	Rating		Voltage / Nominal Output				DC340V / 20W
	Coil Resistance					Ohm	-
	(Ambient Temp. 68 °F (20 °C))
	Safety Device
		Type					Internal Controller
		OverCurrent Protection					Yes
		OverHeat Protection					Yes
	Run Capacitor					Micro F	-
						VAC	-
Drain Pump
	Model ... Q'ty						PLD-12230ST-1 ... 1
	Rating			Voltage, Hz			AC208 to 240V, 60Hz
				Input		W	10.8
	Coil Resistance					Ohm	333 +/- 10%
	(Ambient Temp. 68 °F (20 °C))
	Safty Device			Type			Thermal Fuse
				Open		°F (°C)	293 (145)
Heat Exchanger Coil
	Coil						Aluminum Plate Fin / Copper Tube
	Rows						2
	Fins per inch						18.1
	Face Area					ft2 (m2)	2.94 (0.273)
							DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Indoor Unit (Panel)			CZ-18BT1U
Flap Motor
	Type						Stepping Motor
	Model ... Q'ty						MP24ZN-12V ... 2
	Rating						DC 12V
	Coil Resistance					Ohm	Each Pair of Terminal : 380 +/- 7%
	(Ambient Temp. 77 °F (25 °C))
							DATA SUBJECT TO CHANGE WITHOUT NOTICE.

18

2-2-2. Outdoor Unit

Outdoor Unit CU-KS18NKU

Control PCB
	Part No.				CB-CU-KS18NKU
	Controls				Microprocessor
	Control Circuit Fuse				250V 25A
Compressor
	Type				DC Twin Rotary (Hermetic)
	Compressor Model / Nominal Output				C-6RVN93H0M / 1,050W
	Compressor Oil ... Amount		Pints (cc)		FV50S ... 0.74 (350)
	Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm				R - S : 0.482
					S - T : 0.482
					T - R : 0.482
	Safety Device
		CT (Peak current cut-off control)			Yes
		Compressor Discharge Temp. Control			Yes
		Operation cut-off control in abnormal ambient Temp.			Yes
		Overload Relay		Model	CS-7L115
			Operation Temp.		Open : 239 °F (115 °C), Close : 203 °F (95 °C)
	Run Capacitor			Micro F	-
				VAC	-
	Crankcase Heater				-
Fan
	Type				Propeller
	Q'ty ... Dia.		inch (mm)		1 ... D16-17/32 (D420)
Fan Motor
	Type				DC Motor
	Model ... Q'ty				SIC-67FV-F460-1 ... 1
	No. of Poles				8
	Rough Measure RPM (Cool)				820
	Nominal Output			W	50
	Coil Resistance			Ohm	RED - WHT : 77.5
	(Ambient Temp. 68 °F (20 °C))				WHT - BLU : 77.5
					BLU - RED : 77.5
	Safety Device
		Type			Internal Controller
		OverCurrent Protection			Yes
	Run Capacitor			Micro F	-
				VAC	-
Heat Exchanger Coil
	Coil				Aluminum Plate Fin / Copper Tube
	Rows				2
	Fins per inch				21.2
	Face Area			ft2 (m2)	5.49 (0.510)
External Finish					Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

19

Outdoor Unit CU-KS12NK1A

Control PCB
	Part No.				CB-CU-KS12NK1A
	Controls				Microprocessor
	Control Circuit Fuse				125V 25A
Compressor
	Type				DC Rotary (Hermetic)
	Compressor Model / Nominal Output				G4C090LU1ER / 900W
	Compressor Oil ... Amount		Pints (cc)		FV50S ... 0.68 (320)
	Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm				U - V : 0.81
					V - W : 0.81
					W - U : 0.81
	Safety Device
		CT (Peak current cut-off control)			Yes
		Compressor Discharge Temp. Control			Yes
		Operation cut-off control in abnormal ambient Temp.			Yes
		Overload Relay		Model	CS-7L115
			Operation Temp.		Open : 239 °F (115 °C), Close : 203 °F (95 °C)
	Run Capacitor			Micro F	-
				VAC	-
	Crankcase Heater				115V 20W
Fan
	Type				Propeller
	Q'ty ... Dia.		inch (mm)		1 ... D15-3/4 (D400)
Fan Motor
	Type				DC Motor
	Model ... Q'ty				SIC-67FV-F460-1 ... 1
	No. of Poles				8
	Rough Measure RPM (Cool)				750
	Nominal Output			W	50
	Coil Resistance			Ohm	RED - WHT : 77.5
	(Ambient Temp. 68 °F (20 °C))				WHT - BLU : 77.5
					BLU - RED : 77.5
	Safety Device
		Type			Internal Controller
		OverCurrent Protection			Yes
	Run Capacitor			Micro F	-
				VAC	-
Heat Exchanger Coil
	Coil				Aluminum Plate Fin / Copper Tube
	Rows				2
	Fins per inch				18.1
	Face Area			ft2 (m2)	3.95 (0.367)
External Finish					Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

20

Outdoor Unit CU-KS18NKUA

Control PCB
	Part No.				CB-CU-KS18NKUA
	Controls				Microprocessor
	Control Circuit Fuse				250V 25A
Compressor
	Type				DC Twin Rotary (Hermetic)
	Compressor Model / Nominal Output				C-6RVN93H0M / 1,050W
	Compressor Oil ... Amount		Pints (cc)		FV50S ... 0.74 (350)
	Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm				R - S : 0.482
					S - T : 0.482
					T - R : 0.482
	Safety Device
		CT (Peak current cut-off control)			Yes
		Compressor Discharge Temp. Control			Yes
		Operation cut-off control in abnormal ambient Temp.			Yes
		Overload Relay		Model	CS-7L115
			Operation Temp.		Open : 239 °F (115 °C), Close : 203 °F (95 °C)
	Run Capacitor			Micro F	-
				VAC	-
	Crankcase Heater				-
Fan
	Type				Propeller
	Q'ty ... Dia.		inch (mm)		1 ... D16-17/32 (D420)
Fan Motor
	Type				DC Motor
	Model ... Q'ty				SIC-67FV-F460-1 ... 1
	No. of Poles				8
	Rough Measure RPM (Cool)				820
	Nominal Output			W	50
	Coil Resistance			Ohm	RED - WHT : 77.5
	(Ambient Temp. 68 °F (20 °C))				WHT - BLU : 77.5
					BLU - RED : 77.5
	Safety Device
		Type			Internal Controller
		OverCurrent Protection			Yes
	Run Capacitor			Micro F	-
				VAC	-
Heat Exchanger Coil
	Coil				Aluminum Plate Fin / Copper Tube
	Rows				2
	Fins per inch				21.2
	Face Area			ft2 (m2)	5.49 (0.510)
External Finish					Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

21

2-3. Other Component Specifications

Indoor Unit CS-KS12NB41 & CZ-18BT1U

CS-KS18NB4UW & CZ-18BT1U

Outdoor Unit CU-KS18NKU

CU-KS12NK1A CU-KS18NKUA

•Indoor air temp sensor

(Model:KTEC-35-S98)

	10
ohm)(k	9
	7
Resistance	8
	6
	5
	4
	3
	2
	1
	0
		50		59		68		77		86		95		104
		(10)		(15)		(20)		(25)		(30)		(35)		(40)

Temperature °F (°C)

•Indoor heat exchanger sensor

(Model:PT2M-51H-S3)

•Compressor temp sensor

(CU-KS12NK1A...Model:DTN-TKS274Y TH2) (CU-KS18NKU , CU-KS18NKUA...Model:DTN-TKS293B)

	200
ohm)(k	180
	160
Resistance	140
	120
	100
	80
	60
	40
	20
	0
					50		68		86		104 122 140 158 176 194
	32
	(0)				(10) (20) (30) (40) (50) (60) (70) (80) (90)

Temperature °F (°C)

•Outdoor air temp sensor

(CU-KS12NK1A...Model:DTN-TKS269B) (CU-KS18NKU , CU-KS18NKUA...Model:TKS295B)

•Outdoor heat exchanger sensor

(CU-KS12NK1A...Model:DTN-TKS274Y TH1) (CU-KS18NKU , CU-KS18NKUA...Model:TKS292B)

ohm)	40
	35
(k	30
Resistance	25
	20
	15
	10
	5
	0
		-4	5	14		23		32		41		50		59		68
		(-20)(-15)(-10) (-5) (0)								(5)		(10) (15) (20)
22					Temperature °F (°C)

3. DIMENSIONAL DATA

Indoor Unit CS-KS12NB41 & CZ-18BT1U

CS-KS18NB4UW & CZ-18BT1U

7-11/16	8
	4-29/32	View
		A

					Ceilingopeningdimensions
					23-5/8(600)
					Suspensionboltpitch
					21-1/32(534)
						12-7/16
A	23-5/8 (600)	Ceiling opening dimensions	21-1/32 (534)	Suspension bolt pitch	Center of panel
					7	12-7/8

Air intake	Discharge outlet	Refrigerant tubing (liquid tube) dia. 1/4" (flared)	Refrigerant tubing (gas tube) dia. 1/2" (flared)	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")
1	2	3	4	5	6	7	8

		11-5/32(283)		1-3/16(30)
	5	8-15/32
22-5/8 (575)	6-11/16				24-19/32 (625)
	6-5/16			6 3
	3/32
	2-
			1-25/32	Less than 31/32
		1-25/32	4-19/32

5/8 (575)	31/32
22-	than
	Less
	3-5/8

				1-3/16
				21/32
				3-1/8
The length of the suspension 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.
2	24-19/32(625)
	13-5/32(334)
14-3/32 (358)
2			2 1		2
25/32
			5-9/16
1-9/32			2-3/4
2-3/32				3/32
				1-
	7-23/32			-27/32
				1

Unit : inch (mm)

23

Outdoor Unit CU-KS12NK1A

21-3/16

10-13/16

ID:23/32 19/32-3

	3-19/32
	15/32
	ID:15/16
-
2
	10-7/16(265)	11-13/32	12-7/16

28-11/32 (720)	2-1/8
	21-9/16 (548)
	5/8

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

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

2-5/32

4-9/32

6-3/32

Unit : inch (mm) (852-0-0010-12600-0)

24

Outdoor Unit CU-KS18NKU

CU-KS18NKUA

	11-17/32	ID:23/32
-3/8
1

23-15/16		5-11/32
		15/32
		ID:15/16
	-
	2
		-7/32 (285)	12-7/32	13-5/32
		11

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

34-21/32 (880)

2-17/32

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

26-3/8 (670) 2-5/32

23/32

4-3/8

6-17/32

3/32

1-13/16

5-23/32

2-13/32

Unit : inch (mm) (852-0-0010-13300-0)

25

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Indoor Unit CS-KS12NB41 & CZ-18BT1U

Outdoor Unit CU-KS12NK1A

Indoor unit

Outdoor unit

Heat exchanger

Strainer

	Wide tube
Wide tube	service			Compressor
	valve		Accumulator
O.D.		Muffler
			High pressure
3/8"
(9.52 mm)			switch
			H.P.

			Heat exchanger
		Narrow	Electric
			expansion
		tube
			valve
		service
	Narrow tube		M
		valve
	O.D.		Muffler
	1/4"		Cooling cycle
	(6.35 mm)

26

Indoor Unit CS-KS18NB4UW & CZ-18BT1U Outdoor Unit CU-KS18NKU

CU-KS18NKUA

Indoor unit Outdoor unit

Heat exchanger

Strainer

	Wide tube
Wide tube	service			Compressor
	valve		Accumulator
O.D.		Muffler
			High pressure
1/2"
(12.7mm)			switch
			H.P.

Heat exchanger

Narrow

Electric

expansion

tube

valve

service

Narrow tube

M

valve

O.D.

1/4" Cooling cycle

(6.35 mm)

27

5. PERFORMANCE DATA

5-1. Temperature Charts

Indoor Unit CS-KS12NB41 & CZ-18BT1U

Outdoor Unit CU-KS12NK1A

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

(1) Low pressure performance chart

servicevalve	psig(MPaG)		Lo Fan		Hi Fan
		131
		(0.9)						.86°F (30°C)
				Indoor		Air	Temp
tube
						80°F		(27°C)
wide		102				75°F		(24°C)
at
		(0.7)
Low pressure
		73
		(0.5)	77	86				95	104
			(25)	(30)				(35)	(40)

Outdoor inlet air DB temp. °F(°C)

(2) Operating current performance chart

	15
			Lo Fan	Hi Fan
(A)	14
							(30°C)
current
						.86°F
	13				Temp		(27°C)
				Air		80°F
				Indoor			(24°C)
Operating
	12					75°F
	11
	10	77	86			95	104
		(25)	(30)			(35)	(40)

Outdoor inlet air DB temp. °F(°C)

(3) Indoor discharge air performance chart

°F(°C)	68
	(20)	Lo Fan		Hi Fan
temperature	59
	(15)
	50					.86°F	(30°C)
air			Indoor		Air Temp
	(10)
					80°F	(27°C)
Indoor discharge
	41				75°F	(24°C)
	(5)
	32
	(0)	77	86			95	104
		(25)	(30)			(35)	(40)

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.

28

Indoor Unit CS-KS18NB4UW & CZ-18BT1U

Outdoor Unit CU-KS18NKU or CU-KS18NKUA

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

(1) Low pressure performance chart

servicevalve	psig(MPaG)		Lo Fan		Hi Fan
		131						C)
		(0.9)						.86°F (30°
				Indoor		Air	Temp
								(27°C)
tube						80°F
								(24°C)
wide						75°F
		102
at
		(0.7)
Low pressure
		73
		(0.5)	77	86				95	104
			(25)	(30)				(35)	(40)

Outdoor inlet air DB temp. °F(°C)

(2) Operating current performance chart

	10
	Lo Fan		Hi Fan
(A)	9				(30°C)
				.86°F
			Air	Temp	(27°C)
current				80°F	(24°C)
			Indoor
	8			75°F
Operating	7
	6
	5	86		95	104
	77
	(25)	(30)		(35)	(40)

Outdoor inlet air DB temp. °F(°C)

(3) Indoor discharge air performance chart

°F(°C)	68
	(20)	Lo Fan		Hi Fan
temperature	59
	(15)
							.86°F (30°C)
	50			Indoor	Air Temp
air
	(10)			80°F (27°C)
Indoor discharge				75°F		(24°C)
	41
	(5)
	32
	(0)	77	86			95	104
		(25)	(30)			(35)	(40)

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.

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5-2. Cooling Capacity

Indoor Unit	: CS-KS12NB41 & CZ-18BT1U
Outdoor Unit	: CU-KS12NK1A
Power Supply : 115V Single Phase 60Hz
	< Cooling Capacity >
	RATING CAPACITY:		11,900 BTU/h			AIR FLOW RATE:				235 CFM
	INDOOR					OUTDOOR
	ENT. TEMP. oF (oC)				AMBIENT TEMP. oF (oC)
	WB	DB		65	75	85		95		105	115
				(18.3)	(23.9)	(29.4)		(35.0)		(40.6)	(46.1)
			TC	8,350	8,570	8,800		8,930		9,210	7,830
			CI	0.79	0.93	1.06		1.16		1.25	1.07
		72 (22.2)	SHC	6,340	6,430	6,570		6,610		6,800	6,060
	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
		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
			CI	0.80	0.94	1.08		1.18		1.25	1.07
		72 (22.2)	SHC	7,070	6,930	6,840		6,700		6,200	4,970
	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
		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
			CI	0.82	0.96	1.10		1.20		1.25	1.07
		72 (22.2)	SHC	5,790	5,700	5,610		5,520		4,970	3,870
	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
		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
			CI	0.84	0.98	1.13		1.22		1.25	1.07
		72 (22.2)	SHC	4,460	4,420	4,330		4,280		3,690	2,680
	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
		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
			CI	0.86	1.01	1.15		1.25		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

1.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

2.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.

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