Toshiba RAS-M10SKCV, RAS-M22NKCV1, RAS-M22SKCV, RAS-4M26SACV, RAS-M13SKCV SERVICE MANUAL

FILE NO.A07-007

Revised 1: Jul., 2008

SERVICE MANUAL

AIR-CONDITIONER

SPLIT TYPE

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV, RAS-M22NKCV1 / RAS-4M26SACV

R410A

PRINTED IN JAPAN, Jul., 2008 ToMo

CONTENTS

1.	SAFETY PRECAUTIONS ..........................................................................	3
2.	SPECIFICATIONS......................................................................................	5
3.	REFRIGERANT R410A ...........................................................................	13
4.	CONSTRUCTION VIEWS ........................................................................	21
5.	WIRING DIAGRAM ..................................................................................	25
6.	SPECIFICATIONS OF ELECTRICAL PARTS .........................................	29
7.	REFRIGERANT CYCLE DIAGRAM ........................................................	30
8.	CONTROL BLOCK DIAGRAM ................................................................	32
9.	OPERATION DESCRIPTION ...................................................................	34
10.	INSTALLATION PROCEDURE ................................................................	60
11.	HOW TO DIAGNOSE THE PROBLEM .....................................................	84
12.	HOW TO REPLACE THE MAIN PARTS .................................................	112
13.	EXPLODED VIEWS AND PARTS LIST .................................................	134

1. SAFETY PRECAUTIONS

Power supply cord of outdoor unit shall be more than 2.5 mm² (H07RN-F or 60245IEC66) polychloroprene sheathed flexible cord.

•Read this “SAFETY PRECAUTIONS” carefully before servicing.

•The precautions described below include the important items regarding safety. Observe them without fail.

•After the servicing work, perform a trial operation to check for any problem.

•Turn off the main power supply switch (or breaker) before the unit maintenance.

CAUTION

New Refrigerant Air Conditioner Installation

•THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE LAYER.

R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure of R410A refrigerant is approx. 1.6 times higher than that of refrigerant R22. Accompanied with the adoption of the new refrigerant, the refrigeration machine oil has also been changed.

Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigeration machine oil does not enter into the new type refrigerant R410A air conditioner circuit.

To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port on main unit and installation tools are different from those used for the conventional refrigerant units.

Accordingly, special tools are required for the new refrigerant (R410A) units.

For connecting pipes, use new and clean piping materials with high pressure fittings made for R410A only, so that water and/or dust does not enter. Moreover, do not use the existing piping because there are some problems with pressure fittings and possible impurities in existing piping.

CAUTION

TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY

This appliance must be connected to the main power supply by a circuit breaker or a switch with a contact separation of at least 3 mm.

DANGER

•ASK AN AUTHORIZED DEALER OR QUALIFIED INSTALLATION PROFESSIONAL TO INSTALL/MAINTAIN THE AIR CONDITIONER.

INAPPROPRIATE SERVICING MAY RESULT IN WATER LEAKAGE, ELECTRIC SHOCK OR FIRE.

•TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK.

MAKE SURE ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

DANGER: HIGH VOLTAGE

The high voltage circuit is incorporated.

Be careful to do the check service, as the electric shock may be caused in case of touching parts on the P.C. board by hand.

•CORRECTLY CONNECT THE CONNECTING CABLE. IF THE CONNECTING CABLE IS INCORRECTLY CONNECTED, ELECTRIC PARTS MAY BE DAMAGED.

•CHECK THAT THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE SERVICE AND INSTALLATION. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

•DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

–3 –

•TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT RESISTORS, FURNACE, STOVES, ETC.

•WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL NOT TO ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION CIRCUIT.

IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CIRCUIT WILL BECOME ABNORMALLY HIGH AND IT MAY RESULT IN THE PIPE BURSTING AND POSSIBLE PERSONNEL INJURIES.

•IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE SERVICE WORK AND THE INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM.

IF THE REFRIGERANT GAS IS HEATED, SUCH AS BY FIRE, GENERATION OF POISONOUS GAS MAY RESULT.

WARNING

•Never modify this unit by removing any of the safety guards or bypass any of the safety interlock switches.

•Do not install in a place which cannot bear the weight of the unit. Personal injury and property damage can result if the unit falls.

•After the installation work, confirm that refrigerant gas does not leak.

If refrigerant gas leaks into the room and flows near a fire source such as a cooking range, noxious gas may generate.

•The electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make sure the air conditioner uses an exclusive circuit.

An insufficient circuit capacity or inappropriate installation may cause fire.

•When wiring, use the specified cables and connect the terminals securely to prevent external forces applied to the cable from affecting the terminals.

•Be sure to provide grounding.

Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables. Inappropriate grounding may cause electric shock.

•Conform to the regulations of the local electric company when wiring the power supply.

CAUTION

•Exposure of unit to water or other moisture before installation may result in an electrical short. Do not store in a wet basement or expose to rain or water.

•Do not install in a place that can increase the vibration of the unit.

Do not install in a place that can amplify the noise level of the unit or where noise or discharged air might disturb neighbors.

•To avoid personal injury, be careful when handling parts with sharp edges.

•Perform the specified installation work to guard against an earthquake.

If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

For Reference:

If a heating operation would be continuously performed for a long time under the condition that the outdoor temperature is 0°C or lower, drainage of defrosted water may be difficult due to freezing of the bottom plate, resulting in a problem of the cabinet or fan.

It is recommended to procure an antifreeze heater locally for a safe installation of the air conditioner.

For details, contact the dealer.

– 4 –

2. SPECIFICATIONS

The indoor and outdoor units that can be used in combination are shown in the tables below.

Table of models that can be connected

Type	Outdoor unit		Indoor unit		RAS-
		M10SKCV	M13SKCV	M16SKCV		M22NKCV1	M22SKCV
Cooling-only	RAS-4M26SACV
		M10SDCV	M13SDCV	M16SDCV		M22SDCV	—

NOTES

1-room connection is not an option for the indoor units (you cannot connect only one indoor unit).

Be sure to connect indoor units in two rooms or more.

The contents noted in this service manual limit the indoor units to the RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV and RAS-M22NKCV1.

For other indoor units that can also be used in combination, see the service manual of each indoor unit.

Indoor unit

File No.

RAS-M10SDCV

RAS-M13SDCV

A07-002

RAS-M16SDCV

RAS-M22SDCV

– 5 –

2-1. Specifications

<Cooling only Models>

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22NKCV1 / RAS-4M26SACV

Unit model

Indoor

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22NKCV1

Outdoor

RAS-4M26SACV

Cooling capacity

(kW)

7.5

Cooling capacity range

(kW)

3.7 – 10.0

Heating capacity

(kW)

—

Heating capacity range

(kW)

—

Power supply

220–240 V, 1 Ph, 50Hz / 220 V, 1 Ph, 60Hz

Unit model

RAS-M10SKCV

RAS-M13SKCV

RAS-M16SKCV

RAS-M22NKCV1

Indoor

Running current

(A)

0.21 / 0.20 / 0.19

0.21 / 0.20 / 0.19

0.21 / 0.20 / 0.19

0.31 / 0.30 / 0.29

Power consumption

(W)

35

35

30

45

Electric

Power factor

(%)

75

75

65

45

Operation mode

Cooling

characteristics

Running current

(A)

10.54 / 10.08 / 9.66

Total

Power consumption

(W)

2200

Power factor

(%)

95

Starting current

(A)

10.54 / 10.08 / 9.66

COP (Cooling)

3.41

Unit model

RAS-M10SKCV

RAS-M13SKCV

RAS-M16SKCV

RAS-M22NKCV1

Indoor

High

dB (A)

38 / –

39 / –

45 / –

45 / –

Operating

(Cooling/Heating)

Medium

dB (A)

33 / –

33 / –

40 / –

42 / –

noise

Low

dB (A)

26 / –

26 / –

30 / –

37 / –

Outdoor

Cooling

dB (A)

48

Heating

dB (A)

—

Unit model

RAS-M10SKCV

RAS-M13SKCV

RAS-M16SKCV

RAS-M22NKCV1

Height

(mm)

275

275

275

298

Dimension

Width

(mm)

790

790

790

998

Indoor unit

Depth

(mm)

205

205

205

220

Net weight

(kg)

9

9

9

13

Fan motor output

(W)

20

20

30

30

Air flow rate (Cooling/Heating)

(m³/h)

535 / –

565 / –

690 / –

850 / –

Height

(mm)

795

Dimension

Width

(mm)

900

Depth

(mm)

320

Net weight

(kg)

61

Outdoor unit

Motor output

(W)

2000

Compressor

Type

Twin rotary type with DC-inverter variable speed control

Model

DA220A1F-20L

Fan motor output

(W)

60

Air flow rate

(m³/h)

High : 3200, Medium : 2800

Type

Flare connection

Unit model

RAS-M10SKCV

RAS-M13SKCV

RAS-M16SKCV

RAS-M22NKCV1

Indoor unit

Liquid side

Ø6.35

Ø6.35

Ø6.35

Ø6.35

Gas side

Ø9.52

Ø9.52

Ø12.7

Ø12.7

A unit liquid side/gas side

Ø6.35 / Ø12.7

Outdoor unit

B unit liquid side/gas side

Ø6.35 / Ø9.52

C unit liquid side/gas side

Ø6.35 / Ø9.52

Piping

D unit liquid side/gas side

Ø6.35 / Ø9.52

Maximum length (per unit)

(m)

25

connection

Minimum length (per unit)

(m)

2

Maximum length (total)

(m)

70

Maximum chargeless length

70

Additional refrigerant

No additional refrigerant

Maximum height difference

(m)

15

Name of refrigerant

R410A

Weight

(kg)

2.20

Wiring connection

Power supply

3 wires : includes earth

Interconnection

4 wires : includes earth

Usable

Indoor

(Cooling/Heating)

(°C)

21 – 32 / –

temperature range

Outdoor

(Cooling/Heating)

(°C)

10 – 46 / –

Installation plate

1

1

Wireless remote controller

1

1

Batteries

2

2

Remote controller holder

1

1

Pan head wood screw

2 (Ø3.1 × 16L)

2 (Ø3.1 × 16L)

Indoor unit

Super Oxi Deo filter

1

—

Accessory

Super Steriling filter

1

—

Zeolite plus sasa filter

—

1

Bio Gingo filter

—

1

Mounting screw

6 (Ø4 × 25L)

6 (Ø4 × 25L)

Owner’s manual

1

1

Installation manual

1

1

Outdoor unit

Owner’s manual

1

Installation manual

1

•For performance when each indoor unit is combined with other unit, refer to the separate table.

•The specifications may be subject to change without notice for purpose of improvement.

– 6 –

RAS-M22SKCV

	Unit model	Indoor			RAS-M22SKCV
		Outdoor			RAS-4M26SACV
	Cooling capacity			(kW)	7.5
	Cooling capacity range			(kW)	3.7 – 10.0
	Heating capacity			(kW)	—
	Heating capacity range			(kW)	—
	Power supply				220–240 V, 1 Ph, 50Hz / 220 V, 1 Ph, 60Hz
			Unit model		RAS-M22SKCV
	Electric	Indoor	Running current	(A)	0.38 / 0.36 / 0.35
	characteristics		Power consumption	(W)	50
			Power factor	(%)	60
		Indoor	High	dB (A)	47
	Operating noise		Medium	dB (A)	41
		Sound presure level
			Low	dB (A)	35
			Height	(mm)	320
		Dimension	Width	(mm)	1050
	Indoor unit		Depth	(mm)	228
		Net weight		(kg)	13
		Fan motor output		(W)	30
		Air flow rate		(m³/h)	1080
		Type			Flare connection
	Piping connection	Indoor unit	Liquid side		Ø6.35
			Gas side		Ø12.7
		Name of refrigerant			R410A
	Wiring connection	Indoor unit	Interconnection		4 wires : includes earth
	Usable temperature range		Indoor	(°C)	21 – 32
			Installation plate		1
			Wireless remote controller		1
			Batteries		2
			Remote controller holder		1
	Accessory	Indoor unit	Pan head wood screw		2 (Ø3.1 × 16L)
			Super Oxi Deo filter		1
			Super Steriling filter		1
			Mounting screw		6 (Ø4 × 25L)
			Owner’s manual		1
			Installation manual		1

•For performance when each indoor unit is combined with other unit, refer to the separate table.

•The specifications may be subject to change without notice for purpose of improvement.

– 7 –

2-2. Specifications of Performance When Each Indoor Unit is Combined with Other Unit

<Current limited : Full operation / 220V>

Current	Power	Operating		Indoor unit						Operating			Cooling	Power	Operating	Outdoor
	supply												capacity	consumption	current	noise
limited		status
	(V)		A		B	C		D	A	B	C	D	(kW)	(W)	(A)	(dB)
			10		—	—	—		2.70	—	—	—	2.7	750	4.49	48
													(1.4 to 3.2)	(640 to 950)	(3.88 to 5.61)
			13		—	—	—		3.70	—	—	—	3.7	1200	6.06	48
		1 unit											(1.4 to 4.4)	(640 to 1520)	(3.88 to 7.51)
			16		—	—	—		4.50	—	—	—	4.5	1650	8.15	48
													(1.4 to 5.0)	(640 to 2000)	(3.88 to 9.67)
			22		—	—	—		6.00	—	—	—	6.0	2020	9.87	48
													(2.4 to 6.8)	(660 to 2500)	(4.00 to 11.97)
			10		10	—		—	2.70	2.70	—	—	5.4	1560	7.71	48
													(2.5 to 6.3)	(640 to 2040)	(3.88 to 9.97)
			13		10	—		—	3.41	2.49	—	—	5.9	1850	9.04	48
													(2.7 to 6.6)	(660 to 2220)	(4.00 to 10.63)
			16		10	—		—	3.94	2.36	—	—	6.3	2040	9.86	48
													(2.9 to 6.9)	(670 to 2400)	(4.06 to 11.50)
			13		13	—		—	3.15	3.15	—	—	6.3	2120	10.25	48
													(2.9 to 6.9)	(670 to 2400)	(4.06 to 11.50)
			16		13	—		—	3.73	3.07	—	—	6.8	2290	10.97	48
		2 units											(3.0 to 7.2)	(670 to 2570)	(4.06 to 12.31)
			16		16	—		—	3.60	3.60	—	—	7.2	2550	12.21	48
													(3.2 to 7.5)	(670 to 2750)	(4.06 to 13.17)
			22		10	—		—	4.97	2.23	—	—	7.2	2250	10.78	48
													(3.3 to 8.0)	(670 to 2690)	(4.06 to 12.88)
			22		13	—		—	4.64	2.86	—	—	7.5	2550	12.21	48
													(3.4 to 8.3)	(700 to 2850)	(4.24 to 13.65)
			22		16	—		—	4.29	3.21	—	—	7.5	2500	11.97	48
													(3.4 to 8.5)	(700 to 2880)	(4.24 to 13.79)
			22		22	—		—	3.75	3.75	—	—	7.5	2430	11.64	48
													(3.4 to 9.0)	(700 to 2950)	(4.24 to 14.13)
			10		10	10		—	2.50	2.50	2.50	—	7.5	2400	11.50	48
													(3.5 to 8.2)	(750 to 2720)	(4.43 to 13.03)
			13		10	10		—	3.04	2.23	2.23	—	7.5	2400	11.50	48
													(3.5 to 8.4)	(750 to 2780)	(4.43 to 13.32)
			16		10	10		—	3.40	2.05	2.05	—	7.5	2400	11.50	48
													(3.5 to 8.6)	(750 to 2840)	(4.43 to 13.60)
			13		13	10		—	2.75	2.75	2.00	—	7.5	2400	11.50	48
													(3.5 to 8.6)	(750 to 2840)	(4.43 to 13.60)
			16		13	10		—	3.10	2.55	1.85	—	7.5	2400	11.50	48
													(3.5 to 8.8)	(750 to 2900)	(4.43 to 13.89)
Full	220		13		13	13		—	2.50	2.50	2.50	—	7.5	2400	11.50	48
operation													(3.5 to 8.8)	(750 to 2900)	(4.43 to 13.89)
			16		16	10		—	2.88	2.88	1.74	—	7.5	2400	11.50	48
													(3.5 to 8.9)	(750 to 2930)	(4.43 to 14.03)
		3 units	16		13	13		—	2.84	2.33	2.33	—	7.5	2400	11.50	48
													(3.5 to 8.9)	(750 to 2930)	(4.43 to 14.03)
			16		16	13		—	2.66	2.66	2.18	—	7.5	2400	11.50	48
													(3.5 to 9.1)	(750 to 2990)	(4.43 to 14.32)
			16		16	16		—	2.50	2.50	2.50	—	7.5	2400	11.50	48
													(3.5 to 9.3)	(750 to 3050)	(4.43 to 14.61)
			22		10	10		—	3.94	1.78	1.78	—	7.5	2400	11.50	48
													(3.5 to 9.0)	(750 to 2950)	(4.43 to 14.13)
			22		13	10		—	3.63	2.24	1.63	—	7.5	2400	11.50	48
													(3.5 to 9.1)	(750 to 2960)	(4.43 to 14.18)
			22		13	13		—	3.36	2.07	2.07	—	7.5	2400	11.50	48
													(3.5 to 9.1)	(750 to 2960)	(4.43 to 14.18)
			22		16	10		—	3.41	2.56	1.53	—	7.5	2400	11.50	48
													(3.5 to 9.1)	(750 to 2960)	(4.43 to 14.18)
			22		16	13		—	3.17	2.38	1.95	—	7.5	2400	11.50	48
													(3.5 to 9.2)	(750 to 2970)	(4.43 to 14.23)
			10		10	10	10		1.88	1.88	1.88	1.88	7.5	2200	10.54	48
													(3.7 to 9.5)	(800 to 3170)	(4.72 to 15.18)
			13		10	10	10		2.34	1.72	1.72	1.72	7.5	2200	10.54	48
													(3.7 to 9.6)	(800 to 3200)	(4.72 to 15.33)
			16		10	10	10		2.67	1.61	1.61	1.61	7.5	2200	10.54	48
													(3.7 to 9.8)	(800 to 3270)	(4.72 to 15.66)
			13		13	10	10		2.17	2.17	1.58	1.58	7.5	2200	10.54	48
													(3.7 to 9.8)	(800 to 3270)	(4.72 to 15.66)
			16		13	10	10		2.48	2.04	1.49	1.49	7.5	2200	10.54	48
		4 units											(3.7 to 9.9)	(800 to 3300)	(4.72 to 15.81)
			13		13	13	10		2.01	2.01	2.01	1.47	7.5	2200	10.54	48
													(3.7 to 9.9)	(800 to 3300)	(4.72 to 15.81)
			16		13	13	10		2.31	1.90	1.90	1.39	7.5	2200	10.54	48
													(3.7 to 10.0)	(800 to 3330)	(4.72 to 15.95)
			13		13	13	13		1.88	1.88	1.88	1.88	7.5	2200	10.54	48
													(3.7 to 10.0)	(800 to 3330)	(4.72 to 15.95)
			16		16	10	10		2.34	2.34	1.41	1.41	7.5	2200	10.54	48
													(3.7 to 10.0)	(800 to 3330)	(4.72 to 15.95)
			22		10	10	10		3.18	1.44	1.44	1.44	7.5	2200	10.54	48
													(3.7 to 10.0)	(800 to 3300)	(4.72 to 15.81)

– 8 –

<Current limited : Full operation / 230V>

Current	Power	Operating		Indoor unit						Operating			Cooling	Power	Operating	Outdoor
	supply												capacity	consumption	current	noise
limited		status
	(V)		A		B	C		D	A	B	C	D	(kW)	(W)	(A)	(dB)
			10		—	—	—		2.70	—	—	—	2.7	750	4.29	48
													(1.4 to 3.2)	(640 to 950)	(3.71 to 5.36)
			13		—	—	—		3.70	—	—	—	3.7	1200	5.80	48
		1 unit											(1.4 to 4.4)	(640 to 1520)	(3.71 to 7.18)
			16		—	—	—		4.50	—	—	—	4.5	1650	7.80	48
													(1.4 to 5.0)	(640 to 2000)	(3.71 to 9.25)
			22		—	—	—		6.00	—	—	—	6.0	2020	9.44	48
													(2.4 to 6.8)	(660 to 2500)	(3.83 to 11.45)
			10		10	—		—	2.70	2.70	—	—	5.4	1560	7.37	48
													(2.5 to 6.3)	(640 to 2040)	(3.71 to 9.54)
			13		10	—		—	3.41	2.49	—	—	5.9	1850	8.65	48
													(2.7 to 6.6)	(660 to 2220)	(3.83 to 10.17)
			16		10	—		—	3.94	2.36	—	—	6.3	2040	9.44	48
													(2.9 to 6.9)	(670 to 2400)	(3.88 to 11.00)
			13		13	—		—	3.15	3.15	—	—	6.3	2120	9.81	48
													(2.9 to 6.9)	(670 to 2400)	(3.88 to 11.00)
			16		13	—		—	3.73	3.07	—	—	6.8	2290	10.49	48
		2 units											(3.0 to 7.2)	(670 to 2570)	(3.88 to 11.77)
			16		16	—		—	3.60	3.60	—	—	7.2	2550	11.68	48
													(3.2 to 7.5)	(670 to 2750)	(3.88 to 12.60)
			22		10	—		—	4.97	2.23	—	—	7.2	2250	10.31	48
													(3.3 to 8.0)	(670 to 2690)	(3.88 to 12.32)
			22		13	—		—	4.64	2.86	—	—	7.5	2550	11.68	48
													(3.4 to 8.3)	(700 to 2850)	(4.06 to 13.06)
			22		16	—		—	4.29	3.21	—	—	7.5	2500	11.45	48
													(3.4 to 8.5)	(700 to 2880)	(4.06 to 13.19)
			22		22	—		—	3.75	3.75	—	—	7.5	2430	11.13	48
													(3.4 to 9.0)	(700 to 2950)	(4.06 to 13.52)
			10		10	10		—	2.50	2.50	2.50	—	7.5	2400	11.00	48
													(3.5 to 8.2)	(750 to 2720)	(4.23 to 12.46)
			13		10	10		—	3.04	2.23	2.23	—	7.5	2400	11.00	48
													(3.5 to 8.4)	(750 to 2780)	(4.23 to 12.74)
			16		10	10		—	3.40	2.05	2.05	—	7.5	2400	11.00	48
													(3.5 to 8.6)	(750 to 2840)	(4.23 to 13.01)
			13		13	10		—	2.75	2.75	2.00	—	7.5	2400	11.00	48
													(3.5 to 8.6)	(750 to 2840)	(4.23 to 13.01)
			16		13	10		—	3.10	2.55	1.85	—	7.5	2400	11.00	48
													(3.5 to 8.8)	(750 to 2900)	(4.23 to 13.29)
Full	230		13		13	13		—	2.50	2.50	2.50	—	7.5	2400	11.00	48
operation													(3.5 to 8.8)	(750 to 2900)	(4.23 to 13.29)
			16		16	10		—	2.88	2.88	1.74	—	7.5	2400	11.00	48
													(3.5 to 8.9)	(750 to 2930)	(4.23 to 13.42)
		3 units	16		13	13		—	2.84	2.33	2.33	—	7.5	2400	11.00	48
													(3.5 to 8.9)	(750 to 2930)	(4.23 to 13.42)
			16		16	13		—	2.66	2.66	2.18	—	7.5	2400	11.00	48
													(3.5 to 9.1)	(750 to 2990)	(4.23 to 13.70)
			16		16	16		—	2.50	2.50	2.50	—	7.5	2400	11.00	48
													(3.5 to 9.3)	(750 to 3050)	(4.23 to 13.97)
			22		10	10		—	3.94	1.78	1.78	—	7.5	2400	11.00	48
													(3.5 to 9.0)	(750 to 2950)	(4.23 to 13.52)
			22		13	10		—	3.63	2.24	1.63	—	7.5	2400	11.00	48
													(3.5 to 9.1)	(750 to 2960)	(4.23 to 13.56)
			22		13	13		—	3.36	2.07	2.07	—	7.5	2400	11.00	48
													(3.5 to 9.1)	(750 to 2960)	(4.23 to 13.56)
			22		16	10		—	3.41	2.56	1.53	—	7.5	2400	11.00	48
													(3.5 to 9.1)	(750 to 2960)	(4.23 to 13.56)
			22		16	13		—	3.17	2.38	1.95	—	7.5	2400	11.00	48
													(3.5 to 9.2)	(750 to 2970)	(4.23 to 13.61)
			10		10	10	10		1.88	1.88	1.88	1.88	7.5	2200	10.08	48
													(3.7 to 9.5)	(800 to 3170)	(4.52 to 14.52)
			13		10	10	10		2.34	1.72	1.72	1.72	7.5	2200	10.08	48
													(3.7 to 9.6)	(800 to 3200)	(4.52 to 14.66)
			16		10	10	10		2.67	1.61	1.61	1.61	7.5	2200	10.08	48
													(3.7 to 9.8)	(800 to 3270)	(4.52 to 14.98)
			13		13	10	10		2.17	2.17	1.58	1.58	7.5	2200	10.08	48
													(3.7 to 9.8)	(800 to 3270)	(4.52 to 14.98)
			16		13	10	10		2.48	2.04	1.49	1.49	7.5	2200	10.08	48
		4 units											(3.7 to 9.9)	(800 to 3300)	(4.52 to 15.12)
			13		13	13	10		2.01	2.01	2.01	1.47	7.5	2200	10.08	48
													(3.7 to 9.9)	(800 to 3300)	(4.52 to 15.12)
			16		13	13	10		2.31	1.90	1.90	1.39	7.5	2200	10.08	48
													(3.7 to 10.0)	(800 to 3330)	(4.52 to 15.26)
			13		13	13	13		1.88	1.88	1.88	1.88	7.5	2200	10.08	48
													(3.7 to 10.0)	(800 to 3330)	(4.52 to 15.26)
			16		16	10	10		2.34	2.34	1.41	1.41	7.5	2200	10.08	48
													(3.7 to 10.0)	(800 to 3330)	(4.52 to 15.26)
			22		10	10	10		3.18	1.44	1.44	1.44	7.5	2200	10.08	48
													(3.7 to 10.0)	(800 to 3300)	(4.52 to 15.12)

– 9 –

<Current limited : Full operation / 240V>

Current	Power	Operating		Indoor unit						Operating			Cooling	Power	Operating	Outdoor
	supply												capacity	consumption	current	noise
limited		status
	(V)		A		B	C		D	A	B	C	D	(kW)	(W)	(A)	(dB)
			10		—	—	—		2.70	—	—	—	2.7	750	4.11	48
													(1.4 to 3.2)	(640 to 950)	(3.56 to 5.14)
			13		—	—	—		3.70	—	—	—	3.7	1200	5.56	48
		1 unit											(1.4 to 4.4)	(640 to 1520)	(3.56 to 6.88)
			16		—	—	—		4.50	—	—	—	4.5	1650	7.47	48
													(1.4 to 5.0)	(640 to 2000)	(3.56 to 8.87)
			22		—	—	—		6.00	—	—	—	6.0	2020	9.05	48
													(2.4 to 6.8)	(660 to 2500)	(3.67 to 10.98)
			10		10	—		—	2.70	2.70	—	—	5.4	1560	7.07	48
													(2.5 to 6.3)	(640 to 2040)	(3.56 to 9.14)
			13		10	—		—	3.41	2.49	—	—	5.9	1850	8.29	48
													(2.7 to 6.6)	(660 to 2220)	(3.67 to 9.75)
			16		10	—		—	3.94	2.36	—	—	6.3	2040	9.04	48
													(2.9 to 6.9)	(670 to 2400)	(3.72 to 10.54)
			13		13	—		—	3.15	3.15	—	—	6.3	2120	9.40	48
													(2.9 to 6.9)	(670 to 2400)	(3.72 to 10.54)
			16		13	—		—	3.73	3.07	—	—	6.8	2290	10.05	48
		2 units											(3.0 to 7.2)	(670 to 2570)	(3.72 to 11.28)
			16		16	—		—	3.60	3.60	—	—	7.2	2550	11.20	48
													(3.2 to 7.5)	(670 to 2750)	(3.72 to 12.07)
			22		10	—		—	4.97	2.23	—	—	7.2	2250	9.88	48
													(3.3 to 8.0)	(670 to 2690)	(3.72 to 11.81)
			22		13	—		—	4.64	2.86	—	—	7.5	2550	11.20	48
													(3.4 to 8.3)	(700 to 2850)	(3.89 to 12.51)
			22		16	—		—	4.29	3.21	—	—	7.5	2500	10.98	48
													(3.4 to 8.5)	(700 to 2880)	(3.89 to 12.64)
			22		22	—		—	3.75	3.75	—	—	7.5	2430	10.67	48
													(3.4 to 9.0)	(700 to 2950)	(3.89 to 12.95)
			10		10	10		—	2.50	2.50	2.50	—	7.5	2400	10.54	48
													(3.5 to 8.2)	(750 to 2720)	(4.06 to 11.94)
			13		10	10		—	3.04	2.23	2.23	—	7.5	2400	10.54	48
													(3.5 to 8.4)	(750 to 2780)	(4.06 to 12.21)
			16		10	10		—	3.40	2.05	2.05	—	7.5	2400	10.54	48
													(3.5 to 8.6)	(750 to 2840)	(4.06 to 12.47)
			13		13	10		—	2.75	2.75	2.00	—	7.5	2400	10.54	48
													(3.5 to 8.6)	(750 to 2840)	(4.06 to 12.47)
			16		13	10		—	3.10	2.55	1.85	—	7.5	2400	10.54	48
													(3.5 to 8.8)	(750 to 2900)	(4.06 to 12.73)
Full	240		13		13	13		—	2.50	2.50	2.50	—	7.5	2400	10.54	48
operation													(3.5 to 8.8)	(750 to 2900)	(4.06 to 12.73)
			16		16	10		—	2.88	2.88	1.74	—	7.5	2400	10.54	48
													(3.5 to 8.9)	(750 to 2930)	(4.06 to 12.86)
		3 units	16		13	13		—	2.84	2.33	2.33	—	7.5	2400	10.54	48
													(3.5 to 8.9)	(750 to 2930)	(4.06 to 12.86)
			16		16	13		—	2.66	2.66	2.18	—	7.5	2400	10.54	48
													(3.5 to 9.1)	(750 to 2990)	(4.06 to 13.13)
			16		16	16		—	2.50	2.50	2.50	—	7.5	2400	10.54	48
													(3.5 to 9.3)	(750 to 3050)	(4.06 to 13.39)
			22		10	10		—	3.94	1.78	1.78	—	7.5	2400	10.54	48
													(3.5 to 9.0)	(750 to 2950)	(4.06 to 12.95)
			22		13	10		—	3.63	2.24	1.63	—	7.5	2400	10.54	48
													(3.5 to 9.1)	(750 to 2960)	(4.06 to 13.00)
			22		13	13		—	3.36	2.07	2.07	—	7.5	2400	10.54	48
													(3.5 to 9.1)	(750 to 2960)	(4.06 to 13.00)
			22		16	10		—	3.41	2.56	1.53	—	7.5	2400	10.54	48
													(3.5 to 9.1)	(750 to 2960)	(4.06 to 13.00)
			22		16	13		—	3.17	2.38	1.95	—	7.5	2400	10.54	48
													(3.5 to 9.2)	(750 to 2970)	(4.06 to 13.04)
			10		10	10	10		1.88	1.88	1.88	1.88	7.5	2200	9.66	48
													(3.7 to 9.5)	(800 to 3170)	(4.33 to 13.92)
			13		10	10	10		2.34	1.72	1.72	1.72	7.5	2200	9.66	48
													(3.7 to 9.6)	(800 to 3200)	(4.33 to 14.05)
			16		10	10	10		2.67	1.61	1.61	1.61	7.5	2200	9.66	48
													(3.7 to 9.8)	(800 to 3270)	(4.33 to 14.36)
			13		13	10	10		2.17	2.17	1.58	1.58	7.5	2200	9.66	48
													(3.7 to 9.8)	(800 to 3270)	(4.33 to 14.36)
			16		13	10	10		2.48	2.04	1.49	1.49	7.5	2200	9.66	48
		4 units											(3.7 to 9.9)	(800 to 3300)	(4.33 to 14.49)
			13		13	13	10		2.01	2.01	2.01	1.47	7.5	2200	9.66	48
													(3.7 to 9.9)	(800 to 3300)	(4.33 to 14.49)
			16		13	13	10		2.31	1.90	1.90	1.39	7.5	2200	9.66	48
													(3.7 to 10.0)	(800 to 3330)	(4.33 to 14.62)
			13		13	13	13		1.88	1.88	1.88	1.88	7.5	2200	9.66	48
													(3.7 to 10.0)	(800 to 3330)	(4.33 to 14.62)
			16		16	10	10		2.34	2.34	1.41	1.41	7.5	2200	9.66	48
													(3.7 to 10.0)	(800 to 3330)	(4.33 to 14.62)
			22		10	10	10		3.18	1.44	1.44	1.44	7.5	2200	9.66	48
													(3.7 to 10.0)	(800 to 3300)	(4.33 to 14.49)

– 10 –

<Current limited : 11A / 230V>

Current	Power	Operating		Indoor unit						Operating			Cooling	Power	Operating	Outdoor
	supply												capacity	consumption	current	noise
limited		status
	(V)		A		B	C		D	A	B	C	D	(kW)	(W)	(A)	(dB)
			10		—	—	—		2.70	—	—	—	2.7	750	4.29	48
													(1.4 to 3.2)	(640 to 950)	(3.71 to 5.36)
			13		—	—	—		3.70	—	—	—	3.7	1200	5.80	48
		1 unit											(1.4 to 4.4)	(640 to 1520)	(3.71 to 7.18)
			16		—	—	—		4.50	—	—	—	4.5	1650	7.80	48
													(1.4 to 5.0)	(640 to 2000)	(3.71 to 9.25)
			22		—	—	—		6.00	—	—	—	6.0	2020	9.44	48
													(2.4 to 6.5)	(660 to 2400)	(3.83 to 11.00)
			10		10	—		—	2.70	2.70	—	—	5.4	1560	7.37	48
													(2.5 to 6.3)	(640 to 2040)	(3.71 to 9.54)
			13		10	—		—	3.41	2.49	—	—	5.9	1850	8.65	48
													(2.7 to 6.6)	(660 to 2220)	(3.88 to 10.17)
			16		10	—		—	3.94	2.36	—	—	6.3	2040	9.44	48
													(2.9 to 6.9)	(670 to 2400)	(3.88 to 11.00)
			13		13	—		—	3.15	3.15	—	—	6.3	2120	9.81	48
													(2.9 to 6.9)	(670 to 2400)	(3.88 to 11.00)
			16		13	—		—	3.73	3.07	—	—	6.8	2290	10.49	48
		2 units											(3.0 to 7.1)	(670 to 2400)	(3.88 to 11.00)
			16		16	—		—	3.55	3.55	—	—	7.1	2400	11.00	48
													(3.2 to 7.1)	(670 to 2400)	(3.88 to 11.00)
			22		10	—		—	4.97	2.23	—	—	7.2	2250	10.31	48
													(3.3 to 7.3)	(670 to 2400)	(3.88 to 11.00)
			22		13	—		—	4.52	2.78	—	—	7.3	2400	11.00	48
													(3.4 to 7.3)	(700 to 2400)	(4.06 to 11.00)
			22		16	—		—	4.17	3.13	—	—	7.3	2400	11.00	48
													(3.4 to 7.3)	(700 to 2400)	(4.06 to 11.00)
			22		22	—		—	3.70	3.70	—	—	7.4	2400	11.00	48
													(3.4 to 7.4)	(700 to 2400)	(4.06 to 11.00)
			10		10	10		—	2.50	2.50	2.50	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			13		10	10		—	3.04	2.23	2.23	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			16		10	10		—	3.40	2.05	2.05	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			13		13	10		—	2.75	2.75	2.00	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			16		13	10		—	3.10	2.55	1.85	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
11A	230		13		13	13		—	2.50	2.50	2.50	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			16		16	10		—	2.88	2.88	1.74	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
		3 units	16		13	13		—	2.84	2.33	2.33	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			16		16	13		—	2.66	2.66	2.18	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			16		16	16		—	2.50	2.50	2.50	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			22		10	10		—	3.94	1.78	1.78	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			22		13	10		—	3.63	2.24	1.63	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			22		13	13		—	3.36	2.07	2.07	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			22		16	10		—	3.41	2.56	1.53	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			22		16	13		—	3.17	2.38	1.95	—	7.5	2400	11.00	48
													(3.5 to 7.5)	(750 to 2400)	(4.23 to 11.00)
			10		10	10	10		1.88	1.88	1.88	1.88	7.5	2200	10.08	48
													(3.7 to 7.7)	(800 to 2400)	(4.52 to 11.00)
			13		10	10	10		2.34	1.72	1.72	1.72	7.5	2200	10.08	48
													(3.7 to 7.7)	(800 to 2400)	(4.52 to 11.00)
			16		10	10	10		2.67	1.61	1.61	1.61	7.5	2200	10.08	48
													(3.7 to 7.7)	(800 to 2400)	(4.52 to 11.00)
			13		13	10	10		2.17	2.17	1.58	1.58	7.5	2200	10.08	48
													(3.7 to 7.7)	(800 to 2400)	(4.52 to 11.00)
			16		13	10	10		2.48	2.04	1.49	1.49	7.5	2200	10.08	48
		4 units											(3.7 to 7.7)	(800 to 2400)	(4.52 to 11.00)
			13		13	13	10		2.01	2.01	2.01	1.47	7.5	2200	10.08	48
													(3.7 to 7.7)	(800 to 2400)	(4.52 to 11.00)
			16		13	13	10		2.31	1.90	1.90	1.39	7.5	2200	10.08	48
													(3.7 to 7.7)	(800 to 2400)	(4.52 to 11.00)
			13		13	13	13		1.88	1.88	1.88	1.88	7.5	2200	10.08	48
													(3.7 to 7.7)	(800 to 2400)	(4.52 to 11.00)
			16		16	10	10		2.34	2.34	1.41	1.41	7.5	2200	10.08	48
													(3.7 to 7.7)	(800 to 2400)	(4.52 to 11.00)
			22		10	10	10		3.18	1.44	1.44	1.44	7.5	2200	10.08	48
													(3.7 to 7.7)	(800 to 2400)	(4.52 to 11.00)

– 11 –

2-2-1. Operation Characteristic Curve

	18
	16	•	Conditions
			Indoor	: DB27˚C/WB19˚C
								220V
			Outdoor	: DB35˚C
	14		Air flow	: High
			Pipe length : 5m × 4
	12		4 units operating
(A)	10
Current
	8
										240V
	6
	4							230V
	2
	0
		0	10	20	30	40	50	60	70	80	90

Inverter output frequency (rps)

2-2-2. Capacity Variation Ratio According to Outdoor Temperature

Capacity ratio (%)

110

Current limited start

100

90
80
70
			•	Conditions
				Indoor		: DB27˚C/WB19˚C
				Outdoor		: DB35˚C
60				Indoor air flow : High
				Pipe length		: 5m × 4
				4 units operating
50
	32			33	34	35	36	37	38	39	40	41	42	43	44	45	46

Outdoor temp. (˚C)

Capacity ratio 100% = 7.5kW

– 12 –

3. REFRIGERANT R410A

This air conditioner adopts the new refrigerant HFC (R410A) which does not damage the ozone layer.

The working pressure of the new refrigerant R410A is 1.6 times higher than conventional refrigerant (R22). The refrigerating oil is also changed in accordance with change of refrigerant, so be careful that water, dust, and existing refrigerant or refrigerating oil are not entered in the refrigerant cycle of the air conditioner using the new refrigerant during installation work or servicing.

The next section describes the precautions for air conditioner using the new refrigerant.

Conforming to contents of the next section together with the general cautions included in this manual, perform the correct and safe work.

3-1. Safety During Installation/Servicing

As R410A’s pressure is about 1.6 times higher than that of R22, improper installation/servicing may cause a serious problem. By using tools and materials exclusive for R410A, it is necessary to carry out installation/servicing safely while taking the following precautions into consideration.

1.Never use refrigerant other than R410A in an air conditioner which is designed to operate with R410A.

If other refrigerant than R410A is mixed, pressure in the refrigeration cycle becomes abnormally high, and it may cause personal injury, etc. by a rupture.

2.Confirm the used refrigerant name, and use tools and materials exclusive for the refrigerant R410A.

The refrigerant name R410A is indicated on the visible place of the outdoor unit of the air conditioner using R410A as refrigerant.

To prevent mischarging, the diameter of the service port differs from that of R22.

3.If a refrigeration gas leakage occurs during installation/servicing, be sure to ventilate fully.

If the refrigerant gas comes into contact with fire, a poisonous gas may occur.

4.When installing or removing an air conditioner, do not allow air or moisture to remain in the refrigeration cycle.

Otherwise, pressure in the refrigeration cycle may become abnormally high so that a rupture or personal injury may be caused.

5.After completion of installation work, check to make sure that there is no refrigeration gas leakage.

If the refrigerant gas leaks into the room, coming into contact with fire in the fan-driven heater, space heater, etc., a poisonous gas may occur.

6.When an air conditioning system charged with a large volume of refrigerant is installed in a small room, it is necessary to exercise care so that, even when refrigerant leaks, its concentration does not exceed the marginal level.

If the refrigerant gas leakage occurs and its concentration exceeds the marginal level, an oxygen-deficient accident may result.

7.Be sure to carry out installation or removal according to the installation manual.

Improper installation may cause refrigeration problem, water leakage, electric shock, fire, etc.

8.Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a qualified air conditioner technician or electrician.

Improper repair may result in water leakage, electric shock and fire, etc.

3-2. Refrigerant Piping Installation

3-2-1. Piping Materials and Joints Used

For the refrigerant piping installation, copper pipes and joints are mainly used.

Copper pipes and joints suitable for the refrigerant must be chosen and installed.

Furthermore, it is necessary to use clean copper pipes and joints whose interior surfaces are less affected by contaminants.

1.Copper Pipes

It is necessary to use seamless copper pipes which are made of either copper or copper alloy and it is desirable that the amount of residual oil is less than 40 mg/10 m.

Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface).

Otherwise, the expansion valve or capillary tube may become blocked with contaminants.

As an air conditioner using R410A incurs pressure higher than when using R22, it is necessary to choose adequate materials.

Thicknesses of copper pipes used with R410A are as shown in Table 3-2-1.

Never use copper pipes thinner than 0.8 mm even when it is available on the market.

– 13 –

Table 3-2-1 Thicknesses of annealed copper pipes

			Thickness (mm)
Nominal diameter	Outer diameter (mm)	R410A	R22
1/4	6.35	0.80	0.80
3/8	9.52	0.80	0.80
1/2	12.70	0.80	0.80
5/8	15.88	1.00	1.00

2.Joints

For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants.

a)Flare Joints

Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used.

Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 3-2-3 to 3-2-6 below.

b)Socket Joints

Socket joints are such that they are brazed for connections, and used mainly for thick pipings whose diameter is larger than 20 mm.

Thicknesses of socket joints are as shown in Table 3-2-2.

Table 3-2-2		Minimum thicknesses of socket joints
Nominal diameter		Reference outer diameter of	Minimum joint thickness
		copper pipe jointed (mm)	(mm)
1/4		6.35	0.50
3/8		9.52	0.60
1/2		12.70	0.70
5/8		15.88	0.80

3-2-2. Processing of Piping Materials

When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not enter the pipe interior, that no other oil than lubricating oils used in the installed air-water heat pump is used, and that refrigerant does not leak.

When using lubricating oils in the piping processing, use such lubricating oils whose water content has been removed. When stored, be sure to seal the container with an airtight cap or any other cover.

1.Flare processing procedures and precautions

a)Cutting the Pipe

By means of a pipe cutter, slowly cut the pipe so that it is not deformed.

b)Removing Burrs and Chips

If the flared section has chips or burrs, refrigerant leakage may occur. Carefully remove all burrs and clean the cut surface before installation.

c)Insertion of Flare Nut

– 14 –

d) Flare Processing

Make certain that a clamp bar and copper pipe have been cleaned.

By means of the clamp bar, perform the flare processing correctly.

Use either a flare tool for R410A or conventional flare tool.

Flare processing dimensions differ according to the type of flare tool.

When using a conventional flare tool, be sure to secure “Dimension A” by using a gauge for size adjustment.

ØD

A

Fig. 3-2-1 Flare processing dimensions

Table 3-2-3 Dimensions related to flare processing for R410A

		Outer				A (mm)
	Nominal		Thickness
		diameter			Flare tool for R410A	Conventional flare tool
	diameter		(mm)
		(mm)
					clutch type	Clutch type	Wing nut type
	1/4	6.35	0.8		0 to 0.5	1.0 to 1.5	1.5 to 2.0
	3/8	9.52	0.8		0 to 0.5	1.0 to 1.5	1.5 to 2.0
	1/2	12.70	0.8		0 to 0.5	1.0 to 1.5	2.0 to 2.5
	5/8	15.88	1.0		0 to 0.5	1.0 to 1.5	2.0 to 2.5
		Table 3-2-4 Dimensions related to flare processing for R22
		Outer				A (mm)
	Nominal		Thickness
		diameter			Flare tool for R22	Conventional flare tool
	diameter		(mm)
		(mm)
					clutch type	Clutch type	Wing nut type
	1/4	6.35	0.8		0 to 0.5	0.5 to 1.0	1.0 to 1.5
	3/8	9.52	0.8		0 to 0.5	0.5 to 1.0	1.0 to 1.5
	1/2	12.70	0.8		0 to 0.5	0.5 to 1.0	1.5 to 2.0
	5/8	15.88	1.0		0 to 0.5	0.5 to 1.0	1.5 to 2.0

Table 3-2-5 Flare and flare nut dimensions for R410A

Nominal	Outer diameter	Thickness		Dimension (mm)					Flare nut width
diameter	(mm)	(mm)	A		B	C		D	(mm)
1/4	6.35	0.8	9.1		9.2	6.5		13	17
3/8	9.52	0.8	13.2		13.5	9.7		20	22
1/2	12.70	0.8	16.6		16.0	12.9		23	26
5/8	15.88	1.0	19.7		19.0	16.0		25	29

– 15 –

Table 3-2-6 Flare and flare nut dimensions for R22

Nominal	Outer diameter								Thickness									Dimension (mm)												Flare nut width
diameter		(mm)									(mm)						A		B		C				D					(mm)
1/4	6.35								0.8							9.0			9.2	6.5					13					17
3/8	9.52								0.8							13.0			13.5	9.7					20					22
1/2	12.70								0.8							16.2			16.0	12.9					20					24
5/8	15.88								1.0							19.7			19.0	16.0					23					27
3/4	19.05								1.0							23.3			24.0	19.2					34					36
		to	46˚
		45˚
							B			A													C			D

				43˚	to
					45˚

Fig. 3-2-2 Relations between flare nut and flare seal surface

2.Flare Connecting Procedures and Precautions

a)Make sure that the flare and union portions do not have any scar or dust, etc.

b)Correctly align the processed flare surface with the union axis.

c)Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R410A is the same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur.

When it is strong, the flare nut may crack and may be made non-removable.

When choosing the tightening torque, comply with values designated by manufacturers. Table 3-2-7 shows reference values.

Table 3-2-7 Tightening torque of flare for R410A [Reference values]

	Nominal	Outer diameter	Tightening torque	Tightening torque of torque
				wrenches available on the market
	diameter	(mm)	N•m (kgf•cm)
				N•m (kgf•cm)
	1/4	6.35	14 to 18 (140 to 180)	16 (160), 18 (180)
	3/8	9.52	33 to 42 (330 to 420)	42 (420)
	1/2	12.70	50 to 62 (500 to 620)	55 (550)
	5/8	15.88	63 to 77 (630 to 770)	65 (650)

– 16 –

3-3. Tools

3-3-1. Required Tools

The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is changed to prevent mixing of other refrigerant.

To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.

The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge, clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.

1.Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))

2.Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)

3.Tools commonly used for R410A and for conventional refrigerant (R22)

The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)

Tools whose specifications are changed for R410A and their interchangeability

				R410A		Conventional air-water
				air-water heat pump installation		heat pump installation
	No.	Used tool	Usage
				Existence of	Whether conven-	Whether new equipment
				new equipment	tional equipment	can be used with
				for R410A	can be used	conventional refrigerant
	1	Flare tool	Pipe flaring	Yes	*(Note 1)	¡
		Copper pipe gauge for	Flaring by		*(Note 1)	*(Note 1)
	2	adjusting projection		Yes
			conventional flare tool
		margin
	3	Torque wrench	Connection of flare nut	Yes	×	×
		(For Ø12.7)
	4	Gauge manifold	Evacuating, refrigerant	Yes	×	×
	5	Charge hose	charge, run check, etc.
	6	Vacuum pump adapter	Vacuum evacuating	Yes	×	¡
	7	Electronic balance for	Refrigerant charge	Yes	×	¡
		refrigerant charging
	8	Refrigerant cylinder	Refrigerant charge	Yes	×	×
	9	Leakage detector	Gas leakage check	Yes	×	¡
	10	Charging cylinder	Refrigerant charge	(Note 2)	×	×

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

(Note 2) Charging cylinder for R410A is being currently developed.

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary as the general tools.

	1.	Vacuum pump	4. Reamer		9.	Hole core drill (Ø65)
		Use vacuum pump by attaching	5.	Pipe bender	10.	Hexagon wrench
		vacuum pump adapter.
			6.	Level vial		(Opposite side 4mm)
	2.	Torque wrench (For Ø6.35, Ø9.52)
			7.	Screwdriver (+, –)	11.	Tape measure
	3.	Pipe cutter
			8.	Spanner or Monkey wrench	12.	Metal saw
	Also prepare the following equipments for other installation method and run check.
	1.	Clamp meter	3. Insulation resistance tester
	2.	Thermometer	4. Electroscope

– 17 –

3-4. Recharging of Refrigerant

When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps.

Recover the refrigerant, and check no refrigerant remains in the equipment.

Connect the charge hose to packed valve service port at the outdoor unit’s gas side.

Connect the charge hose to the vacuum pump adapter.

Open fully both packed valves at liquid and gas sides.

Place the handle of the gauge manifold Low in the fully opened position, and turn on the vacuum pump’s power switch. Then, evacuating the refrigerant in the cycle.

When the compound gauge’s pointer has indicated –0.1 Mpa (–76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump’s power switch.

Keep the status as it is for 1 to 2 minutes, and ensure that the compound gauge’s pointer does not return.

Set the refrigerant cylinder to the electronic balance, connect the connecting hose to the cylinder and the connecting port of the electronic balance, and charge liquid refrigerant.

(For refrigerant charging, see the figure below.)

1.Never charge refrigerant exceeding the specified amount.

2.If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.

3.Do not carry out additional charging.

When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high pressure, and may cause a rupture or personal injury.

	(Indoor unit)	(Outdoor unit)
		Opened
	Refrigerant cylinder
	(with siphon)
	Check valve	Opened
	Opened
	Open/close	Closed
	valve for charging
		Service port
	Electronic balance for refrigerant charging

Fig. 3-4-1 Configuration of refrigerant charging

– 18 –

1.Be sure to make setting so that liquid can be charged.

2.When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.

It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.

Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the cylinder upside down if cylinder is not equipped with siphon.

[ Cylinder with siphon ]	[ Cylinder without siphon ]
Gauge manifold	Gauge manifold
OUTDOOR unit	OUTDOOR unit

Refrigerant

cylinder

Electronic

balance

R410A refrigerant is HFC mixed refrigerant.

Therefore, if it is charged with gas, the composition of the charged refrigerant changes and the characteristics of the equipment varies.

cylinder Refrigerant

Electronic

balance

Siphon

Fig. 3-4-2

3-5. Brazing of Pipes

3-5-1. Materials for Brazing

1.Silver brazing filler

Silver brazing filler is an alloy mainly composed of silver and copper. It is used to join iron, copper or copper alloy, and is relatively expensive though it excels in solderability.

2.Phosphor bronze brazing filler

Phosphor bronze brazing filler is generally used to join copper or copper alloy.

3.Low temperature brazing filler

Low temperature brazing filler is generally called solder, and is an alloy of tin and lead. Since it is weak in adhesive strength, do not use it for refrigerant pipes.

1.Phosphor bronze brazing filler tends to react with sulfur and produce a fragile compound water solution, which may cause a gas leakage. Therefore, use any other type of brazing filler at a hot spring resort, etc., and coat the surface with a paint.

2.When performing brazing again at time of servicing, use the same type of brazing filler.

3-5-2. Flux

1.Reason why flux is necessary

•By removing the oxide film and any foreign matter on the metal surface, it assists the flow of brazing filler.

•In the brazing process, it prevents the metal surface from being oxidized.

•By reducing the brazing filler’s surface tension, the brazing filler adheres better to the treated metal.

– 19 –

2.Characteristics required for flux

•Activated temperature of flux coincides with the brazing temperature.

•Due to a wide effective temperature range, flux is hard to carbonize.

•It is easy to remove slag after brazing.

•The corrosive action to the treated metal and brazing filler is minimum.

•It excels in coating performance and is harmless to the human body.

As the flux works in a complicated manner as described above, it is necessary to select an adequate type of flux according to the type and shape of treated metal, type of brazing filler and brazing method, etc.

3.Types of flux

•Noncorrosive flux

Generally, it is a compound of borax and boric acid. It is effective in case where the brazing temperature is higher than 800°C.

•Activated flux

Most of fluxes generally used for silver brazing are this type.

It features an increased oxide film removing capability due to the addition of compounds such as potassium fluoride, potassium chloride and sodium fluoride to the borax-boric acid compound.

4.Piping materials for brazing and used brazing filler/flux

Piping material	Used brazing filler	Used flux
Copper - Copper	Phosphor copper	Do not use
Copper - Iron	Silver	Paste flux
Iron - Iron	Silver	Vapor flux

1.Do not enter flux into the refrigeration cycle.

2.When chlorine contained in the flux remains within the pipe, the lubricating oil deteriorates.Therefore, use a flux which does not contain chlorine.

3.When adding water to the flux, use water which does not contain chlorine (e.g. distilled water or ion-exchange water).

4.Remove the flux after brazing.

3-5-3. Brazing

As brazing work requires sophisticated techniques, experiences based upon a theoretical knowledge, it must be performed by a person qualified.

In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting dry Nitrogen gas (N2) flow.

Never use gas other than Nitrogen gas.

1.Brazing method to prevent oxidation

1)Attach a reducing valve and a flow-meter to the Nitrogen gas cylinder.

2)Use a copper pipe to direct the piping material, and attach a flow-meter to the cylinder.

3)Apply a seal onto the clearance between the piping material and inserted copper pipe for Nitrogen in order to prevent backflow of the Nitrogen gas.

4)When the Nitrogen gas is flowing, be sure to keep the piping end open.

5)Adjust the flow rate of Nitrogen gas so that it is lower than 0.05 m3/Hr or 0.02 MPa (0.2kgf/cm2) by means of the reducing valve.

6)After performing the steps above, keep the Nitrogen gas flowing until the pipe cools down to a certain extent (temperature at which pipes are touchable with hands).

7)Remove the flux completely after brazing.

M Flow meter

Stop valve

Nitrogen gas cylinder

From Nitrogen cylinder

Pipe Nitrogen gas

Rubber plug

Fig. 3-5-1 Prevention of oxidation during brazing

– 20 –

4. CONSTRUCTION VIEWS

4-1. Indoor Unit

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV

790

Front panel

Air filter

Air inlet

205

		275
63			63
7	48	48	7
		Heat exchanger
Knock out system		Knock out system

49

62 69

116

480

193

Installation plate hanger

	Installation plate hanger	Drain hose (0.50m)
	Connecting pipe (0.35m)
	(For 10,13 series; Flare Ø9.52mm)	Connecting pipe (0.40m)
	(For 16 series; Flare Ø12.7mm)	(Flare Ø6.35mm)

	157
56	19

Wireless remote controller 125

							63	26
	84.5		621			84.5	Remote controller holder
			235	235
			215	215
			Hanger	Minimum	65 more
				distance
				to ceiling	or
	Minimum						45
						Minimum
	distance					distance
275	to wall					to wall	190
	170 or more					170 or more
	40	Hanger			Hanger		40
	84.5	150	160.5	160.5	150	84.5
		Center line			Installation plate outline
			– 21 –

RAS-M22SKCV

1050

Front panel		Air filter		Air inlet

320

73.5
7	50
	Heat exchanger
Knock out system

228

	73.5
50	7
Knock out system

50

72 78

Installation plate hanger

204

132 568 200 150 56 24

Wireless remote controller

						163
					82	26
Installation plate hanger					Remote controller holder
Connecting plate (0.39m)			Drain hose	Connecting pipe (0.49m)
(Flare Ø12.70mm)			(0.5mm)	(Flare Ø6.35mm)
132			786		132
		235	235
		215	215
85		Hanger			23
320
40					40
		Hanger	Hanger
47	215.5	262.5	262.5	153.5	109
	Center line		Instrallation plate outline
		– 22 –

RAS-M22NKCV1

Back body

998

	Front panel	Air inlet
	Grille inlet
		220
	298
75			75
7		50	8
51		Air outlet

Knock out system

Connection pipe (0.39 m) (Flare Ø12.7)

55 or more	Minimum distance to ceiling
Outline of indoor unit
298

Knock out system

50

75 56

160

		Drain hose (0.54 m)
		Connection pipe (0.49 m)		57	18
		(Flare Ø6.35)	Wireless remote controller
	998
	763.5		(For stud bolt Ø6)
	450
20		20	(For stud bolt Ø8 - Ø10)
48	10		29
			41	48
			55 55
			55

Ø65

	100	Installation	100
		plate outline

Ø65

40

– 23 –

– 24 –

2-dia.12 × 17 U-shape hole (for dia.8-10 anchor bolt)

17.5
365	Anchor bolt long hole pitch
17.5

320 28

795

410

25

400

Knock out

2-dia.3.5 hole

Knock out

150	600	150
50	A log part

	B log part
50	2-dia.12 × 17 long hole
	(for dia.8-10 anchor bolt)

		900
Fan guard	136	dia.510

Hanger

Liquid valve

38
514	53 53 53 53 53
	53 53
	90

Screw

		Mounting dimensions of anchor bolt			When installing the outdoor unit,
	2-dia.12 × 17 U-shape hole		600		leave open in at least two of
				Intake	directions (A), (B), (C) and (D)
	(for dia.8-10 anchor bolt)				shown in the figure below.
			100 or more
		D
		Intake			600 or more
					A
	365
		100 or more		Outside line	(Minimum distance from wall)
		C
				of product
		600 or more	B
			Outlet	2-dia.12 × 17 long hole

(for dia.8-10 anchor bolt)

164
91	Outdoor air temperature sensor	Fan guard

	Gas valve	Hanger
	Service port

Connecting pipe port :

Connecting pipe dia.6.35

D unit

Connecting pipe dia.9.52

Connecting pipe dia.6.35

C unit

Connecting pipe dia.9.52

Connecting pipe dia.6.35

B unit

Connecting pipe dia.9.52

Connecting pipe dia.6.35

A unit

Connecting pipe dia.12.7

98

		Knock out	Detailed		A	log part
				50
			20	12		R14
		Tightly seal the knock-out holes and
		screw/thread areas using a silicon adhesive, etc.	365
		to ensure that there is no water drippage.		R6		Outside line
		Under some conditions, comdensation may form			600 of product
262	431	on the base plate and arain, use the drain pan.

Detailed		B	log part
	600		Outside line
365		R6	of product
			17
R20	12
	50

units : mm

Drain long hole	Drain hole
dia.20 × 88 long hole	dia.25	5-dia.3.5 hole

RAS	.2-4
4M26SACV-	Unit Outdoor

5. WIRING DIAGRAM

5-1. Indoor Unit

RAS-M10SKCV, RAS-M13SKCV

Outdoor terminal block 1 2 3

Indoor terminal block		1 2 3	Heat exchanger
	BLK	WHI RED
Power supply			GRN & YEL
(From Outdoor unit)
1 , 220 240V ~,	50Hz
1 , 220V ~,	60Hz
Sheet metal
BLK
CN02	3	1
	CN01 CN51

											1	1
											3	3
											5	5
							Fuse F01	3			CN31
							T3.15A				(WHI)
											1	1
					1	1	CN63				2	2
					2	2	(YEL)				3	3
Heat exchanger sensor											CN33
											(WHI)
		(TCJ)
					1	1	CN62				1	1
					2	2	(BLU)				2	2
Heat exchanger sensor								Varistor	Line filter		3	3
		(TC)									4	4
					1	1	CN61
											5	5
					2	2	(WHI)				CN32
	Thermo sensor										(WHI)
		(TA)									CN22
				BLU				DC5V			(WHI)
		1	1		1	1					1
				BLU
		2	2		2	2		DC12V		supplyPower circuit	2
unitWirelessassembly	5044-MCC			BLUBLU
		12 12			12 12
		3	3	BLU	3	3					3
		4	4	BLU	4	4					4
		5	5	BLU	5	5
		6	6	BLU	6	6
		7	7	BLU	7	7
				BLU
		8	8		8	8
				BLU
		9	9		9	9
				BLU
		10 10			10 10
		11 11		BLU	11 11
		13 13		BLU	13 13
		14 14			14 14		Main P.C. board
		15 15		WHI	15 15
								MCC-5046

CN10	CN21
(WHI)	(WHI)

WHI	1	1
YEL	2	2
YEL	3	3
YEL	4	4
YEL	5	5

	6	6
	5	5
	4	4	AC motor
	3	3
	2	2
	1	1
			Fan motor

Louver motor

Color

Identification

YEL : YELLOW BLK : BLACK WHI : WHITE RED : RED BLU : BLUE

GRN & YEL : GRAY & YELLOW

– 25 –

RAS-M16SKCV, RAS-M22SKCV

Outdoor terminal block		1	2 3
Indoor terminal block		1	2 3	Heat exchanger
		BLK WHI	RED
Power supply				GRN & YEL
(From Outdoor unit)
1Ø, 220 – 240V ~, 50Hz
1Ø, 220V ~,	60Hz
Sheet metal
BLK
CN02	3	1
	CN01 CN51

1 1

		Fuse F01		3	3			DC motor
				4	4
		T3.15A
				5	5
		AC250V
				6	6
				CN31				Fan motor
				(WHI)
1	1	CN63	Varistor
2	2	(YEL)		1	1	WHI	1	1
Heat exchanger sensor
				2	2	YEL	2	2
(TCJ)
1	1	CN62		3 3		YEL	3	3
2	2	(BLU)		4 4		YEL	4	4
Heat exchanger sensor			Line filter	5 5		YEL	5	5
				CN32				Louver motor
(TC)
1	1	CN61		(WHI)
2	2	(WHI)

	Thermo sensor
		(TA)							CN22
							DC5V		(WHI)
									1
		1	1	BLU	1	1	DC12V	supplyPower circuit	2
	unitWirelessassembly 5044-MCC			WHI					RED	: RED
		11 11			11 11
		2	2	BLU	2	2			3
		3	3	BLU	3	3			4
		4	4	BLU	4	4
		5	5	BLU	5	5
		6	6	BLU	6	6	~		Color
				BLU					Identification
		7	7		7	7	– +
				BLU
		8	8		8	8	~		YEL	: YELLOW
				BLU
		9	9		9	9			BLK	: BLACK
				BLU
		10 10			10 10				WHI	: WHITE
		CN10			CN21		Main P.C. board		BLU	: BLUE
									GRN & YEL :
							MCC-5045
		(WHI)			(WHI)				GRAY & YELLOW

– 26 –

RAS-M22NKCV1

Louver motor

WHI	PNK	YEL	ORN	RED	BRW
6	5	4	3	2	1
6	5	4	3	2	1	CN07
					5

			3
2			F01
1	BLK	CN24	T3.15A, 250V
2	WHI	CN23
3	RED	CN21
Indoor
terminal block

GRN & YEL

Outdoor unit Indoor unit

1	2	3	CN11
1	2	3
Color			BRW
			GRY
Identification
			YEL

BRW : BROWN

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

ORN : ORANGE

GRN : GREEN

PNK : PINK

GRN & YEL :

GRAY & YELLOW

Infrared rays receive and indication parts MCC-819

1	2	3	4	5	6	7	8	9 10
1	2	3	4	5	6	7	8	9 10	CN25

BLU BLU BLU BLU BLU BLU BLU BLU BLU WHI	HA
	JEM-A

1	2	3	4	5	6	7	8	9 10
1	2	3	4	5	6	7	8	9 10	CN14	1	2	3	4	CN08
							4
					Power supply					+12V DC
						circuit				+5V DC

Fan motor

drive circuit Main P.C. board

(WP-004)

6

	5		3		1	CN10	1	2	CN03	1	2	CN01
	5		3		1		1	2	(WHI)	1	2	(BLU)
BLK							BLK	BLK		BLK	BLK
				RED	WHI
1	2	3	4	5	6		Thermo.			Heat exchanger
1	2	3	4	5	6		sensor			sensor
							(TA)			(TC)
145˚C						AC Fan motor

	Simple check points for diagnosing faults
	Check item	Diagnosis result
	1	Check to see if the OPERATION indicator goes on and
	Operation indicator	off when the main switch or breaker is turned on.
	2	Check the power supply voltage between • and ‚.
	Terminal block	(Refer to the name plate)
		Check the voltage between ‚ and ƒ. (AC15 – 60V)
	3	Check to see if the fuse blows out.
	Fuse, 3.15A
	4	Check the voltage at the No. 8 pin on CN14 connector
	DC5V	of the infrared receiver.
	5	Check the voltage at the brown lead of the louver motor.
	DC12V	(Check the power supply circuit of the rated voltage.)
	6	Check the voltage at the No. 1 pin of CN10 connector
	AC220 – 240V	and CN24. (Check the F01)

For detailed diagnostic procedure, refer to the service data.

– 27 –

5-2. Outdoor Unit

	RAS-4M26SACV
	Thermostat for
	compressor
	ORN	2 2		P501
	ORN	1 1		P500
	Fan motor	5	5
	FM	4	4	CN802
		3	3
				CN301
		2	2
		1	1

3	3
2	2	CN300
1	1	CN608

		6	6
	PMV	5	5		CN607
		4 4		CN704
	D	3	3	BLU
		2	2
		1	1		CN606
		6	6
	PMV	5	5		CN605
		4 4		CN703
	C	3	3	RED
		2	2		CN604
		1	1
		6	6		CN602
		5	5	CN702
	PMV
		4 4		WHI
	B	3	3	Fan	CN601
		2	2	circuit
		1	1
		6	6		CN302
	PMV	5	5	F300, Fuse
		4 4
				T3.15A, 250V~
	A	3 3		CN701	CN800
		2	2	YEL
		1	1

Photo coupler

SUB P.C. Board	CN303
(MCC-818)
F500, Fuse
T6.3A, 250V~	CN501

P07 P03

P04

P05

P06

WHI

RED

ORN

PNK

YEL

1 2 3	1 2 3	1 2 3	1 2 3
To	To	To	To
Indoor	Indoor	Indoor	Indoor
unit A	unit B	unit C	unit D

						Color Identification
		BLK : BLACK				PNK : PINK		ORN : ORANGE
		BLU : BLUE				GRN : GREEN		YEL : YELLOW
		RED : RED				WHI : WHITE		PUR : PURPLE
		GRY : GRAY				BRW : BROWN
		RED				P.C. Board
2	2	2 2								+
1	1	1 1				(MCC-1438)
Compressor				RED		CN20	T03 CT			BU	module
										EU
				WHI		CN21	T04 CT			BV
		CM								EV
				BLK		CN22				BW	IGBT
										EW
2	2			TGd		Power supply circuit				BX
										BY
1	1	BLU				(For P.C. Board)				BZ
3	3					F04				– Q200
				TGc		Fuse
		GRN				T3.15A
1	1					250V~		P20		YEL
3	3							P19
				TGb				P18
		BRW								BLU
1	1							P17
3	3						C13		G IGBT
		YEL		TGa			C12
1	1						C11		C (PFC)
									E
2	2	2	2	BLU			C10			Q404
1	1	1	1
									+ Diode
3	3
									~ block
		TD						F02	~ (PFC)
1	1					Power			– DB02
								Fuse
2	2	TO				relay		25A
1	1					RY02		250V~	P29	+
3	3			3 3					P21	~ Diode
			BLU						P24	~ block
1	1		YEL	1	1	RB05			P28	–
			BLK			CN04
5	5			5	5			P13
			WHI							GRY
4	4			4	4			P12
			BLU
3	3			3	3	CN06				Reactor
			RED
2	2			2	2			P09
			PNK						2 2
1	1			1	1			P08
									1	1
2	2		PUR	2	2
						CN05	T02 CT
			ORN
1	1			1	1
				5 5					Surge
			WHI				Varistor		absorber
3	3			3	3
							F01, Fuse
1	1		RED	1 1		CN13	T25A,
							250V~
		Fuse,				CN01		CN02		CN03
		T6.3A, 250V~

BLK	BLK WHI	BLK
WHI
Terminal block	L N

Power supply 220–240V ~50Hz 220–220V ~60Hz

– 28 –

6. SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV

	No.		Parts name	Type		Specifications
	1	Fan motor	RAS-M10SKCV, M13SKCV	AFS-220-20-4AR	AC240V, 20W
		(for indoor)	RAS-M16SKCV, M22SKCV	ICF-340-30-2B	DC340V, 30W
	2	Room temp. sensor (TA-sensor)		( – )	10kΩ	at 25°C
	3	Heat exchanger temp. sensor (TC-sensor)		( – )	10kΩ	at 25°C
	4	Louver motor		MP24Z3T	Output (Rated) 1W, 16 poles, DC12V

RAS-M22NKCV1

No.	Parts name	Type	Specifications
1	Fan motor (for indoor)	AFS-220-31-4A	AC220–240V
2	Thermo. sensor (TA-sensor)	( – )	10kΩ at 25°C
3	DC-DC transformer (T01)	TT-10	198-264V, 6VA
4	Microcomputer	µPD780024AGK
5	Heat exchanger temp. sensor (TC-sensor)	( – )	10kΩ at 25°C
6	Line filter (L01)	SS11V-06270	27µH, AC 0.64A
7	Diode (DB01)	KBP06M	1.5A, 420V
8	Capacitor (C50)	LXV35VB2200MJ20	2200µF, 35V
9	Fuse (F01)	BET 3.15A, AC250V	T3.15A, 250V
10	Regulator IC (IC08)	NJM7812	DC12V, 1.5A max.
11	Regulator IC (IC11)	NJM7805	DC5V, 1.5A max
12	Resistor (R21, R109)	15G561K	560V
13	Louver motor	MP35EA12	DC12V

6-2. Outdoor Unit

RAS-4M26SACV

No.	Parts name			Model name		Rating
	SC coil (Noise filter) (L01)			ADR2520R15TB	AC 250V, 20A, 0.15mH
1	SC coil (Noise filter) (L02)			SC-20-S03J	AC 250V, 20A, 0.3mH
	SC coil (Noise filter) (L03)			ADR25H200RBTB	AC 250V, 20A, 0.88mH
					Primary side DC 240 – 390V
2	DC-DC transformer			SWT-75	Secondary side :		7V × 1, 13V × 1
							16V × 3
3	Outside fan motor			ICF-140-63-2R	DC 140V, 63W
5	Relay (Power relay)			G4A-1A-PE	Coil	: DC 12V
					Contact : 20A, AC250V
6	Discharge temp. sensor (TD-sensor)			(Inverter attached)	64kΩ	(20°C)
7	Outside air temp. sensor (TO-sensor)			(Inverter attached)	10kΩ	(25°C)
8	Temp. sensor at A room gas side (TGA-sensor)			(Inverter attached)	10kΩ	(25°C)
9	Temp. sensor at B room gas side (TGB-sensor)			(Inverter attached)	10kΩ	(25°C)
10	Temp. sensor at C room gas side (TGC-sensor)			(Inverter attached)	10kΩ	(25°C)
11	Temp. Sensor at D room gas side (TGD-sensor)			(Inverter attached)	10kΩ	(25°C)
12	Terminal block (6P)			—	AC 250V, 20A
13	Terminal block (3P)			—	AC 250V, 20A
			For protection of switching power source (F04)		AC 250V, 3.15A
			For protection of power factor converter circuit breakage		AC 250V, 25A
14	Fuse		For protection of inverter input overcurrent		AC 250V, 25A
			For protection of switching power source (F300)		AC 250V, 3.15A
			For protection of power source		AC 250V, 6.3A
15	Electrolytic capacitor			LLQ2G761KHUATF	DC 400V, 760µF
16	Transistor module			6MBI40SS-060-51A	600V, 40A
17	Compressor			DA220A2F-20L	3 phases, 4 poles, 2000W
18	Compressor thermo.			US622KXTMQO	OFF : 125 ± 4°C, ON : 90 ± 5°C
19	Diode block (Rectifire)			S30VT80	AC 800V, 30A
20	Reactor (Main)			CH-47-Z-T	L = 8mH, 16A

– 29 –

7. REFRIGERANT CYCLE DIAGRAM

7-1. Indoor Unit and Ourdoor Unit

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV, RAS-M22NKCV1 / RAS-4M26SACV

Temp. measurement T1

TCa

To	To	To
D room	C room	B room

Connecting pipe Thickness : 0.8mm Ø12.7 :

RAS-M22NKCV1, RAS-M16SKCV RAS-M22SKCV

Ø9.52 : RAS-M10SKCV, RAS-M13SKCV

To	To	To
Indoor unit A D room	C room	B room

Evaporator

Cross flow fan

TA

Connecting pipe Thickness : 0.8mm Ø6.35

Sectional shape of heat insulator

Allowable height difference : 15m

Allowable pipe length

Per 1 unit Max. : 25m Min. : 2m

Total

Max. : 70m 1 or 50m 2

(Ø9.52)	(Ø9.52)		(Ø9.52)	(Ø12.7)	(Ø6.35)	(Ø6.35)	(Ø6.35)		(Ø6.35)
					Strainer
TGd	TGc		TGb	TGa					Pulse motor
									valve at liquid side
									(UKV-18D)
P Pressure		Packed valve (Gas side)				Packed valve (Liquid side)
measurement		(Ø12.7)				(Ø9.52)
Gauge attaching port
Vacuum pump
connecting port
					Muffler
Accumulating tank					Ø25 x 160L
1500cc					TD
					Compressor
					DA220A2F-20L
Temp. measurement				T2	TO
				Propeller fan		Refrigerant amount : 2.2kg (R410A)
				Outdoor unit		NOTE :		Gas leak check position

Refrigerant flow

NOTE :

1 In case of without the RAS-M22SKCV indoor unit.

2 In case of with the RAS-M22SKCV indoor unit.

The additional charging of refrigerant is unnecessary because this conditioner is designed with charge-less specification.

–30 –