Toshiba RAS-18SAV-E2, RAS-22SKV2-E, RAS-18SAV2-E, RAS-22SAV2-E, RAS-22SAV-E2 SERVICE MANUAL

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SERVICE MANUAL

AIR-CONDITIONER

SPLIT TYPE

Indoor Unit

RAS-18, 22SKV-E

FILE NO. SVM-10050-1

RAS-18, 22SKVRRAS-18, 22SKV RAS-18, 22SKV

2-E

-A

RAS-18, 22SKVR-A RAS-18, 22SKV-ND

Outdoor Unit

RAS-18, 22SAV-E2 RAS-18, 22SAV2-E

RAS-18, 22SAV2-

R410A

Revised on May, 2010

FILE NO. SVM-10050

CONTENTS

1. SAFETY PRECAUTIONS .......................................................................... 3

2. SPECIFICATIONS...................................................................................... 5

3. REFRIGERANT R410A ........................................................................... 12

4. CONSTRUCTION VIEWS ........................................................................ 20

5. WIRING DIAGRAM .................................................................................. 23

6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 24

7. REFRIGERANT CYCLE DIAGRAM ........................................................ 25

8. CONTROL BLOCK DIAGRAM ................................................................ 28

9. OPERATION DESCRIPTION ................................................................... 31

10. INSTALLATION PROCEDURE ................................................................ 56

11. HOW TO DIAGNOSE THE TROUBLE ...................................................... 69

12. HOW TO REPLACE THE MAIN PARTS ................................................... 93

13. EXPLODED VIEWS AND PARTS LIST ................................................. 110

– 2 –

FILE NO. SVM-10050

1. SAFETY PRECAUTIONS

For general public use

Power supply cord of outdoor unit shall be more than 1.5 mm ² (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 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.

– 3 –

FILE NO. SVM-10050

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

• 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 REGISTERS, 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.

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

Inappropriate grounding may cause electric shock.

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 trouble 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

2-1. Specifications

RAS-18SKV-E / RAS-18SAV-E2 RAS-22SKV-E / RAS-22SAV-E2

Unit model

Cooling capacity (kW) Cooling capacity range (kW) Heating capacity (kW) Heating capacity range (kW) Power supply

Electric characteristic

COP Sound pressure

level

Sound power level

Indoor unit Depth (mm)

Outdoor unit

Piping connection Gas side (mm)

Refrigerant

Wiring connection

Usable temperature range

Accessory

Indoor Outdoor

Operation mode

Indoor

Outdoor Power consumption (W)

Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Unit model

Dimension Width (mm)

Net weight (kg) Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Unit model

Dimension Width (mm)

Net weight (kg)

Compressor Type

Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Type

Indoor unit

Outdoor unit

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m) Name of refrigerant Weight (kg)

Indoor unit

Outdoor unit

Running current (A) Power consumption (W) Power factor (%) Operation mode Running current (A)

Power factor (%) Starting current (A)

Height (mm)

Depth (mm)

Motor output (W)

Model

Liquid side (mm) Gas side (mm) Liquid side (mm)

Power supply Interconnection Indoor (Cooling/Heating) (°C) Outdoor (Cooling/Heating) (°C) Installation plate Wireless remote controller Batteries Remote controller holder

Toshiba New IAQ filter

Mounting screw

Remote controller holder Pan head wood screw

Plasma air purifier Installation manual Owner’s manual Drain nipple

Water-proof rubber cap

FILE NO. SVM-10050

RAS-18SKV-E RAS-22SKV-E

RAS-18SAV-E2 RAS-22SAV-E2

5.0 6.0

1.1 – 6.0 1.2 – 6.7

5.8 7.0

0.8 – 6.3 1.0 – 7.5

1 Ph / 50Hz / 220 – 240V, 1 Ph / 60Hz / 220 – 230V

Cooling Heating Cooling Heating

0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35 40 40 50 50 60 60 60 60

Cooling Heating Cooling Heating

6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42

1380 1520 1945 2000

98 99 99 99

7.28-6.68 9.56-8.77

3.52 3.72 3.01 3.41

44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35

49 50 53 52

59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50

64 65 68 67

RAS-18SKV-E RAS-22SKV-E

320 320

1050 1050

228 228

13 13 30 30

15.9 / 16.5 17.7 / 18.0

RAS-18SAV-E2 RAS-22SAV-E2

550 550 780 780 290 290

41 41

Twin rotary type with DC-inverter variable speed control

1100 1100

DA130A1F-27F DA150A1F-20F

43 43

36.3 / 31.9 38.6 / 37.2

Flare connection Flare connection

Ø6.35 Ø6.35

Ø12.70 Ø12.70

Ø6.35 Ø6.35

Ø12.70 Ø12.70

20 20 15 15 10 10

R410A R410A

1.40 1.40 3 Wires: includes earth (Outdoor)

21 ~ 32 / ~ 28 21 ~ 32 / ~ 28

–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24

6 (Ø4 × 25L) 6 (Ø4 × 25L)

2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)

4 Wires: includes earth

11 11 22 11

—

11 11 11 22

—

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

– 5 –

RAS-18SKVR-E / RAS-18SAV-E2 RAS-22SKVR-E / RAS-22SAV-E2

Unit model

Cooling capacity (kW) Cooling capacity range (kW) Heating capacity (kW) Heating capacity range (kW) Power supply

Electric characteristic

COP Sound pressure

level

Sound power level

Indoor unit Depth (mm)

Outdoor unit

Piping connection Gas side (mm)

Refrigerant

Wiring connection

Usable temperature range

Accessory

Indoor Outdoor

Operation mode

Indoor

Outdoor Power consumption (W)

Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Unit model

Dimension Width (mm)

Net weight (kg) Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Unit model

Dimension Width (mm)

Net weight (kg)

Compressor Type

Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Type

Indoor unit

Outdoor unit

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m) Name of refrigerant Weight (kg)

Indoor unit

Outdoor unit

Running current (A) Power consumption (W) Power factor (%) Operation mode Running current (A)

Power factor (%) Starting current (A)

Height (mm)

Depth (mm)

Motor output (W)

Model

Liquid side (mm) Gas side (mm) Liquid side (mm)

Power supply Interconnection Indoor (Cooling/Heating) (°C) Outdoor (Cooling/Heating) (°C) Installation plate Wireless remote controller Batteries Remote controller holder

Toshiba New IAQ filter

Mounting screw

Remote controller holder Pan head wood screw

Plasma air purifier Installation manual Owner’s manual Drain nipple

Water-proof rubber cap

FILE NO. SVM-10050

RAS-18SKVR-E RAS-22SKVR-E

RAS-18SAV-E2 RAS-22SAV-E2

5.0 6.0

1.1 – 6.0 1.2 – 6.7

5.8 7.0

0.8 – 6.3 1.0 – 7.5

1 Ph / 50Hz / 220 – 240V, 1 Ph / 60Hz / 220 – 230V

Cooling Heating Cooling Heating

0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35 40 40 50 50 60 60 60 60

Cooling Heating Cooling Heating

6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42

1380 1520 1945 2000

98 99 99 99

7.28-6.68 9.56-8.77

3.52 3.72 3.01 3.41

44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35

49 50 53 52

59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50

64 65 68 67

RAS-18SKVR-E RAS-22SKVR-E

320 320

1050 1050

228 228

13 13 30 30

15.9 / 16.5 17.7 / 18.0

RAS-18SAV-E2 RAS-22SAV-E2

550 550 780 780 290 290

41 41

1100 1100

Twin rotary type with DC-inverter variable speed control

DA130A1F-27F DA150A1F-20F

43 43

36.3 / 31.9 38.6 / 37.2

Flare connection Flare connection

Ø6.35 Ø6.35

Ø12.70 Ø12.70

Ø6.35 Ø6.35

Ø12.70 Ø12.70

20 20 15 15 10 10

R410A R410A

1.40 1.40 3 Wires: includes earth (Outdoor)

4 Wires: includes earth

21 ~ 32 / ~ 28 21 ~ 32 / ~ 28

–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24

11 11 22 11

6 (Ø4 × 25L) 6 (Ø4 × 25L)

2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)

11 11 11 11 22

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

– 6 –

RAS-18SKV2-E / RAS-18SAV2-E RAS-22SKV2-E / RAS-22SAV2-E

Unit model

Cooling capacity (kW) Cooling capacity range (kW) Heating capacity (kW) Heating capacity range (kW) Power supply

Electric characteristic

COP Sound pressure

level

Sound power level

Indoor unit Depth (mm)

Outdoor unit

Piping connection Gas side (mm)

Refrigerant

Wiring connection

Usable temperature range

Accessory

Indoor Outdoor

Operation mode

Indoor

Outdoor Power consumption (W)

Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Unit model

Dimension Width (mm)

Net weight (kg) Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Unit model

Dimension Width (mm)

Net weight (kg)

Compressor Type

Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Type

Indoor unit

Outdoor unit

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m) Name of refrigerant Weight (kg)

Indoor unit

Outdoor unit

Running current (A) Power consumption (W) Power factor (%) Operation mode Running current (A)

Power factor (%) Starting current (A)

Height (mm)

Depth (mm)

Motor output (W)

Model

Liquid side (mm) Gas side (mm) Liquid side (mm)

Power supply Interconnection Indoor (Cooling/Heating) (°C) Outdoor (Cooling/Heating) (°C) Installation plate Wireless remote controller Batteries Remote controller holder

Toshiba New IAQ filter

Mounting screw

Remote controller holder Pan head wood screw

Plasma air purifier Installation manual Owner’s manual Drain nipple

Water-proof rubber cap

FILE NO. SVM-10050

RAS-18SKV2-E RAS-22SKV2-E RAS-18SAV2-E RAS-22SAV2-E

5.0 6.0

1.1 – 6.0 1.2 – 6.7

5.8 7.0

0.8 – 6.3 1.0 – 7.5

1 Ph / 50Hz / 220 – 240V, 1 Ph / 60Hz / 220 – 230V

Cooling Heating Cooling Heating

0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35 40 40 50 50 60 60 60 60

Cooling Heating Cooling Heating

6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42

1380 1520 1945 2000

98 99 99 99

7.28-6.68 9.56-8.77

3.52 3.72 3.01 3.41

44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35

49 50 53 52

59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50

64 65 68 67

RAS-18SKV2-E RAS-22SKV2-E

320 320

1050 1050

228 228

13 13 30 30

15.9 / 16.5 17.7 / 18.0

RAS-18SAV2-E RAS-22SAV2-E

550 550 780 780 290 290

41 41

1100 1100

Twin rotary type with DC-inverter variable speed control

DA130A1F-27F DA150A1F-20F

43 43

36.3 / 31.9 38.6 / 37.2

Flare connection Flare connection

Ø6.35 Ø6.35

Ø12.70 Ø12.70

Ø6.35 Ø6.35

Ø12.70 Ø12.70

20 20 15 15 10 10

R410A R410A

1.40 1.40 3 Wires: includes earth (Outdoor)

4 Wires: includes earth

21 ~ 32 / ~ 28 21 ~ 32 / ~ 28

–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24

11 11 22 11

6 (Ø4 × 25L) 6 (Ø4 × 25L)

2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)

——

11 11 11 22

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

– 7 –

RAS-18SKV-A / RAS-18SAV2-A RAS-22SKV-A / RAS-22SAV2-A

Unit model

Cooling capacity (kW) Cooling capacity range (kW) Heating capacity (kW) Heating capacity range (kW) Power supply

Electric characteristic

COP Sound pressure

level

Sound power level

Indoor unit Depth (mm)

Outdoor unit

Piping connection Gas side (mm)

Refrigerant

Wiring connection

Usable temperature range

Accessory

Indoor Outdoor

Operation mode

Indoor

Outdoor Power consumption (W)

Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Unit model

Dimension Width (mm)

Net weight (kg) Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Unit model

Dimension Width (mm)

Net weight (kg)

Compressor Type

Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Type

Indoor unit

Outdoor unit

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m) Name of refrigerant Weight (kg)

Indoor unit

Outdoor unit

Running current (A) Power consumption (W) Power factor (%) Operation mode Running current (A)

Power factor (%) Starting current (A)

Height (mm)

Depth (mm)

Motor output (W)

Model

Liquid side (mm) Gas side (mm) Liquid side (mm)

Power supply Interconnection Indoor (Cooling/Heating) (°C) Outdoor (Cooling/Heating) (°C) Installation plate Wireless remote controller Batteries Remote controller holder

Toshiba New IAQ filter

Mounting screw

Remote controller holder Pan head wood screw

Plasma air purifier Installation manual Owner’s manual Drain nipple

Water-proof rubber cap

FILE NO. SVM-10050-1

RAS-18SKV-A RAS-22SKV-A RAS-18SAV2-A RAS-22SAV2-A

5.0 6.0

1.1 – 6.0 1.2 – 6.7

5.8 7.0

0.8 – 6.3 1.0 – 7.5

1 Ph / 50Hz / 220 – 240V

Cooling Heating Cooling Heating

0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35 40 40 50 50 60 60 60 60

Cooling Heating Cooling Heating

6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42

1380 1520 1945 2000

98 99 99 99

7.28-6.68 9.56-8.77

3.52 3.72 3.01 3.41

44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35

49 50 53 52

59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50

64 65 68 67

RAS-18SKV-A RAS-22SKV-A

320 320

1050 1050

228 228

13 13 30 30

15.9 / 16.5 17.7 / 18.0

RAS-18SAV2-A RAS-22SAV2-A

550 550 780 780 290 290

41 41

1100 1100

Twin rotary type with DC-inverter variable speed control

DA130A1F-27F DA150A1F-20F

43 43

36.3 / 31.9 38.6 / 37.2

Flare connection Flare connection

Ø6.35 Ø6.35

Ø12.70 Ø12.70

Ø6.35 Ø6.35

Ø12.70 Ø12.70

20 20 15 15 10 10

R410A R410A

1.40 1.40 3 Wires: includes earth (Outdoor)

4 Wires: includes earth

21 ~ 32 / ~ 28 21 ~ 32 / ~ 28

–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24

11 11 22 11

6 (Ø4 × 25L) 6 (Ø4 × 25L)

2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)

——

11 11 11 22

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

– 8 –

RAS-18SKVR-A / RAS-18SAV2-A RAS-22SKVR-A / RAS-22SAV2-A

Unit model

Cooling capacity (kW) Cooling capacity range (kW) Heating capacity (kW) Heating capacity range (kW) Power supply

Electric characteristic

COP Sound pressure

level

Sound power level

Indoor unit Depth (mm)

Outdoor unit

Piping connection Gas side (mm)

Refrigerant

Wiring connection

Usable temperature range

Accessory

Indoor Outdoor

Operation mode

Indoor

Outdoor Power consumption (W)

Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Unit model

Dimension Width (mm)

Net weight (kg) Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Unit model

Dimension Width (mm)

Net weight (kg)

Compressor Type

Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Type

Indoor unit

Outdoor unit

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m) Name of refrigerant Weight (kg)

Indoor unit

Outdoor unit

Running current (A) Power consumption (W) Power factor (%) Operation mode Running current (A)

Power factor (%) Starting current (A)

Height (mm)

Depth (mm)

Motor output (W)

Model

Liquid side (mm) Gas side (mm) Liquid side (mm)

Power supply Interconnection Indoor (Cooling/Heating) (°C) Outdoor (Cooling/Heating) (°C) Installation plate Wireless remote controller Batteries Remote controller holder

Toshiba New IAQ filter

Mounting screw

Remote controller holder Pan head wood screw

Plasma air purifier Installation manual Owner’s manual Drain nipple

Water-proof rubber cap

FILE NO. SVM-10050-1

RAS-18SKVR-A RAS-22SKVR-A

RAS-18SAV2-A RAS-22SAV2-A

5.0 6.0

1.1 – 6.0 1.2 – 6.7

5.8 7.0

0.8 – 6.3 1.0 – 7.5

1 Ph / 50Hz / 220 – 240V

Cooling Heating Cooling Heating

0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35 40 40 50 50 60 60 60 60

Cooling Heating Cooling Heating

6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42

1380 1520 1945 2000

98 99 99 99

7.28-6.68 9.56-8.77

3.52 3.72 3.01 3.41

44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35

49 50 53 52

59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50

64 65 68 67

RAS-18SKVR-A RAS-22SKVR-A

320 320

1050 1050

228 228

13 13 30 30

15.9 / 16.5 17.7 / 18.0

RAS-18SAV2-A RAS-22SAV2-A

550 550 780 780 290 290

41 41

1100 1100

Twin rotary type with DC-inverter variable speed control

DA130A1F-27F DA150A1F-20F

43 43

36.3 / 31.9 38.6 / 37.2

Flare connection Flare connection

Ø6.35 Ø6.35

Ø12.70 Ø12.70

Ø6.35 Ø6.35

Ø12.70 Ø12.70

20 20 15 15 10 10

R410A R410A

1.40 1.40 3 Wires: includes earth (Outdoor)

4 Wires: includes earth

21 ~ 32 / ~ 28 21 ~ 32 / ~ 28

–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24

11 11 22 11

6 (Ø4 × 25L) 6 (Ø4 × 25L)

2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)

11 11 11 11 22

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

– 9 –

RAS-18SKV-ND / RAS-18SAV2-E RAS-22SKV-ND / RAS-22SAV2-E

Unit model

Cooling capacity (kW) Cooling capacity range (kW) Heating capacity (kW) Heating capacity range (kW) Power supply

Electric characteristic

COP Sound pressure

level

Sound power level

Indoor unit Depth (mm)

Outdoor unit

Piping connection Gas side (mm)

Refrigerant

Wiring connection

Usable temperature range

Accessory

Indoor Outdoor

Operation mode

Indoor

Outdoor Power consumption (W)

Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Indoor H / M+ / M / L+ / L (dB-A) Outdoor H (dB-A) Unit model

Dimension Width (mm)

Net weight (kg) Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Unit model

Dimension Width (mm)

Net weight (kg)

Compressor Type

Fan motor output (W) Air flow rate (Cooling/Heating) (m³/min) Type

Indoor unit

Outdoor unit

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m) Name of refrigerant Weight (kg)

Indoor unit

Outdoor unit

Running current (A) Power consumption (W) Power factor (%) Operation mode Running current (A)

Power factor (%) Starting current (A)

Height (mm)

Depth (mm)

Motor output (W)

Model

Liquid side (mm) Gas side (mm) Liquid side (mm)

Power supply Interconnection Indoor (Cooling/Heating) (°C) Outdoor (Cooling/Heating) (°C) Installation plate Wireless remote controller Batteries Remote controller holder

Toshiba New IAQ filter

Mounting screw

Remote controller holder Pan head wood screw

Plasma air purifier Installation manual Owner’s manual Drain nipple

Water-proof rubber cap

FILE NO. SVM-10050

RAS-18SKV-ND RAS-22SKV-ND

RAS-18SAV2-E RAS-22SAV2-E

5.0 6.0

1.1 – 6.0 1.2 – 6.7

5.8 7.0

0.8 – 6.3 1.0 – 7.5

1 Ph / 50Hz / 220 – 240V, 1 Ph / 60Hz / 220 – 230V

Cooling Heating Cooling Heating

0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35 40 40 50 50 60 60 60 60

Cooling Heating Cooling Heating

6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42

1380 1520 1945 2000

98 99 99 99

7.28-6.68 9.56-8.77

3.52 3.72 3.01 3.41

44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35

49 50 53 52

59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50

64 65 68 67

RAS-18SKV-ND RAS-22SKV-ND

320 320

1050 1050

228 228

13 13 30 30

15.9 / 16.5 17.7 / 18.0

RAS-18SAV2-E RAS-22SAV2-E

550 550 780 780 290 290

41 41

1100 1100

Twin rotary type with DC-inverter variable speed control

DA130A1F-27F DA150A1F-20F

43 43

36.3 / 31.9 38.6 / 37.2

Flare connection Flare connection

Ø6.35 Ø6.35

Ø12.70 Ø12.70

Ø6.35 Ø6.35

Ø12.70 Ø12.70

20 20 15 15 10 10

R410A R410A

1.40 1.40 3 Wires: includes earth (Outdoor)

4 Wires: includes earth

21 ~ 32 / ~ 28 21 ~ 32 / ~ 28

–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24

11 11 22 11

6 (Ø4 × 25L) 6 (Ø4 × 25L)

2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)

——

11 11 11 22

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

– 10 –

2-2. Operation Characteristic Curve

FILE NO. SVM-10050

10.00

9.00

8.00

7.00

6.00

5.00

Current (A)

4.00

3.00

2.00

1.00

0.00 0 102030405060708090100110120 0 102030405060708090100110120

RAS-22SKV-E RAS-22SKVR-E RAS-22SKV2-E RAS-22SKV-A RAS-22SKVR-A RAS-22SKV-ND

RAS-18SKV-E RAS-18SKVR-E RAS-18SKV2-E RAS-18SKV-A

RAS-18SKVR-A RAS-18SKV-ND

Compressor Speed (RPS)

10.00

9.00

8.00

7.00

6.00

5.00

Current (A)

4.00

3.00

2.00

1.00

0.00

RAS-22SKV-E RAS-22SKVR-E RAS-22SKV2-E RAS-22SKV-A RAS-22SKVR-A RAS-22SKV-ND

RAS-18SKV-E RAS-18SKVR-E RAS-18SKV2-E RAS-18SKV-A

RAS-18SKVR-A RAS-18SKV-ND

Compressor Speed (RPS)

2-3. Capacity Variation Ratio According to Temperature

105

100

Capacity Ratio (%)

Capacity Ratio: 100% =

5.0kW (RAS-18SKV-E, RAS-18SKVR-E, RAS-18SKV2-E, RAS-18SKV-A, RAS-18SKVR-A, RAS-18SKV-ND)

6.0kW (RAS-22SKV-E, RAS-22SKVR-E, RAS-22SKV2-E, RAS-22SKV-A, RAS-22SKVR-A, RAS-22SKV-ND)

32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 –15

RAS-18SKV-E RAS-18SKVR-E RAS-18SKV2-E RAS-18SKV-A

RAS-18SKVR-A RAS-18SKV-ND RAS-22SKV-E RAS-22SKVR-E RAS-22SKV2-E RAS-22SKV-A RAS-22SKVR-A RAS-22SKV-ND

Condition Indoor: DB27°C/WB19°C Indoor Air-Flow Volume: High Pipe Length: 7.5m

Outdoor Temperature (°C)

120

100

Capacity Ratio (%)

RAS-18SKV-E RAS-18SKVR-E RAS-18SKV2-E RAS-18SKV-A

RAS-18SKVR-A RAS-18SKV-ND RAS-22SKV-E RAS-22SKVR-E RAS-22SKV2-E RAS-22SKV-A RAS-22SKVR-A RAS-22SKV-ND

Condition Indoor: DB20°C Indoor Air-Flow Volume: High Pipe Length: 7.5m

Capacity Ratio: 100% =

kW (RAS-18SKV-E, RAS-18SKVR-E, RAS-18SKV2-E,

5.8 RAS-18SKV-A, RAS-18SKVR-A, RAS-18SKV-ND)

7.0kW (RAS-22SKV-E, RAS-22SKVR-E, RAS-22SKV2-E, RAS-22SKV-A, RAS-22SKVR-A, RAS-22SKV-ND)

–10–50 510

Outdoor Temperature (°C)

– 11 –

3. REFRIGERANT R410A

FILE NO. SVM-10050

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 time.

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 trouble. 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 starvation accident may result.

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

Improper installation may cause refrigeration trouble, 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.

– 12 –

Table 3-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

FILE NO. SVM-10050

Nominal diameter

1/4

3/8

1/2

5/8

Outer diameter (mm)

6.35

9.52

12.70

15.88

R410A R22

0.80 0.80

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

1/4

3/8

1/2

5/8

Reference outer diameter of

copper pipe jointed (mm)

6.35

9.52

12.70

15.88

Minimum joint thickness

(mm)

0.50

0.60

0.70

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

– 13 –

ØD

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.

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

FILE NO. SVM-10050

Fig. 3-2-1 Flare processing dimensions

Nominal

diameter

1/4 6.35 0.8

3/8 9.52 0.8

1/2 12.70 0.8

5/8 15.88 1.0

Nominal

diameter

1/4 6.35 0.8

3/8 9.52 0.8

Outer

diameter

(mm)

Table 3-2-4 Dimensions related to flare processing for R22

Outer

diameter

(mm)

Thickness

(mm)

Thickness

(mm)

Flare tool for R410A

clutch type

0 to 0.5

Flare tool for R22

clutch type

0 to 0.5

A (mm)

Conventional flare tool

Clutch type Wing nut type

1.0 to 1.5 1.5 to 2.0

1.0 to 1.5 2.0 to 2.5

A (mm)

Conventional flare tool

Clutch type Wing nut type

0.5 to 1.0 1.0 to 1.5

1/2 12.70 0.8

5/8 15.88 1.0

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

Nominal Outer diameter Thickness

diameter (mm) (mm)

1/4 6.35 0.8

3/8 9.52 0.8

1/2 12.70 0.8

5/8 15.88 1.0

– 14 –

0 to 0.5

Dimension (mm)

ABCD

9.1 9.2 6.5 13

13.2 13.5 9.7 20

16.0 16.6 12.9 23

19.0 19.7 16.0 25

0.5 to 1.0 1.5 to 2.0

Flare nut width

(mm)

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

FILE NO. SVM-10050

Nominal Outer diameter Thickness

diameter (mm) (mm)

1/4 6.35 0.8

3/8 9.52 0.8

1/2 12.70 0.8

5/8 15.88 1.0

3/4 19.05 1.0

45˚ to 46˚

B A

Dimension (mm)

ABCD

9.0 9.2 6.5 13

13.0 13.5 9.7 20

16.0 16.2 12.9 20

19.0 19.7 16.0 23

23.3 24.0 19.2 34

43˚ to 45˚

Flare nut width

(mm)

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.

NOTE :

When applying oil to the flare surface, be sure to use oil designated by the manufacturer. If any other oil is used, the lubricating oils may deteriorate and cause the compressor to burn out.

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

Nominal

diameter

Outer

diameter

(mm)

Tightening torque

N•m (kgf•cm)

1/4 6.35 14 to 18 (140 to 180)

torque wrenches available on the market

Tightening torque of

N•m (kgf•cm)

16 (160), 18 (180)

3/8 9.52 33 to 42 (330 to 420)

1/2 12.70 50 to 62 (500 to 620)

5/8 15.88 63 to 77 (630 to 770)

– 15 –

42 (420)

55 (550)

65 (650)

FILE NO. SVM-10050

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

No.

Used tool

Flare tool

Copper pipe gauge for adjusting projection margin

Torque wrench (For Ø12.7)

Gauge manifold

Charge hose

Vacuum pump adapter

Electronic balance for refrigerant charging

Refrigerant cylinder

Leakage detector

Charging cylinder

Usage

Pipe flaring

Flaring by conventional flare tool

Connection of flare nut

Evacuating, refrigerant charge, run check, etc.

Vacuum evacuating

Refrigerant charge

Gas leakage check

Refrigerant charge

air-water heat pump installation

R410A

Existence of Whether conventional new equipment equipment can be for R410A used

Ye s ∗ (Note 1)

Ye s N o

∗ (Note 2) No

Conventional air-water heat pump installation

Whether new equipment can be used with conventional refrigerant

Ye s

∗ (Note 1)

Ye s

(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 Use vacuum pump by attaching vacuum pump adapter.

2. Torque wrench (For Ø6.35, Ø9.52)

3. Pipe cutter

4. Reamer

5. Pipe bender

6. Level vial

7. Screwdriver (+, –)

8. Spanner or Monkey wrench

9. Hole core drill (Ø65)

10. Hexagon wrench (Opposite side 4mm)

11. Tape measure

12. Metal saw

Also prepare the following equipments for other installation method and run check.

1. Clamp meter

2. Thermometer

3. Insulation resistance tester

4. Electroscope

– 16 –

FILE NO. SVM-10050

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.

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.

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.

(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)

Opened

(Outdoor unit)

Refrigerant cylinder

(with siphon)

Check valve

Opened Open/close valve for charging

Electronic balance for refrigerant charging

Fig. 3-4-1 Configuration of refrigerant charging

Opened

Closed

Service port

– 17 –

FILE NO. SVM-10050

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

OUTDOOR unit

Refrigerant

cylinder

Gauge manifold

OUTDOOR unit

cylinder

Refrigerant

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.

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.

Electronic

balance

Siphon

Fig. 3-4-2

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

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. 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.

– 18 –

Nitrogen gas

cylinder

Pipe

Flow meter

Stop valve

From Nitrogen cylinder

Nitrogen gas

Rubber plug

FILE NO. SVM-10050

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

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 m

/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.

Piping material

Copper - Copper

1. Do not enter flux into the refrigeration cycle.

2. When chlorine contained in the flux remains

3. When adding water to the flux, use water

4. Remove the flux after brazing.

Copper - Iron

Iron - Iron

Used brazing filler

Phosphor copper

Silver

Used flux

Do not use

Paste flux

Vapor flux

within the pipe, the lubricating oil deteriorates. Therefore, use a flux which does not contain chlorine.

which does not contain chlorine (e.g. distilled water or ion-exchange water).

Fig. 3-5-1

Prevention of oxidation during brazing

– 19 –

4-1. Indoor Unit

RAS-18SKVR-E, RAS-22SKVR-E

RAS-18SKVR-A, RAS-22SKVR-A

FILE NO. SVM-10050

4. CONSTRUCTION VIEWS

1050

Front panel

73.5

Knock out system Knock out system

Air filter

320

Heat exchanger

Installation plate hanger

132 568

Air inlet Plasma air purifier

Air ionizer

200 150

228

73.5

157

Installation plate hanger

Connecting plate (0.39m) (For 18, 22 series; Flare Ø12.70mm)

132

320

47 215.5 262.5 262.5 153.5 109

Center line Instrallation plate outline

Drain hose (0.5mm)

786 132

235 235 215 215

Hanger

Wireless remote controller

125

Connecting pipe (0.49m) (Flare Ø6.35mm)

HangerHanger

Remote controller holder

– 20 –

RAS-18SKV-E, RAS-22SKV-E

RAS-18SKV-A, RAS-22SKV-A RAS-18SKV-ND, RAS-22SKV-ND

RAS-18SKV2-E, RAS-22SKV2-E

FILE NO. SVM-10050

1050

Front panel

73.5

Knock out system Knock out system

Air filter

320

Heat exchanger

Installation plate hanger

132 568 200 150

Air inlet

228

72 78

Wireless remote controller

73.5

157

Installation plate hanger

Connecting plate (0.39m) (For 18, 22 series; Flare Ø12.70mm)

132 786

320

47 215.5 262.5 262.5 153.5 109

235 215 215

Hanger

Drain hose (0.5mm)

235

Hanger

Connecting pipe (0.49m) (Flare Ø6.35mm)

132

125

Remote controller holder

Center line Instrallation plate outline

– 21 –

4-2. Outdoor Unit

FILE NO. SVM-10050

108 125

600

320

306

R5.5

6 hole

A detail Drawing (Back leg)

290

320

FAN-GUARD

436

550

275

25 Drain outlet

11 x 14

(For 8 -

Hole

10 anchor bolt)

306

320

6 hole

11x14 hole

36 50

B Detail Drawing (Front leg)

COVER-PV

9060090

320 342

100 or more

320

100 or more

Air outlel

Z View

600

Air intlel

600 or more

137

2 - R5-5 x 17L Ushape

(For ∅ 8 - ∅10 anchor bolt)

600 or more

2 - ∅11 x 14 Long holes (For ∅8- ∅10 anchor bolt)

Electrical part cover

Liquid side (Flare 6.35)

Gas side

(Flare ∅ 12.7)

Service port

Installation dimension

– 22 –

5-1. Indoor Unit / Outdoor Unit

FILE NO. SVM-10050-1

5. WIRING DIAGRAM

Compressor

Reactor

Ion

Electrode

High-voltage

Power Supply

4433221

P04

RED

1 2 3

YEL

BRW

YEL

ORN

121

1 2 3

P05

WHI

P06

BLK

P25

P24

P23

P22

P21

P20

P35 L03

P34

P19

P18 P11

P08

P33 P30 BLK

DB01

Q404

P32

PUR

SKVR-E only

121

343

Air Purifier

Electrode

RED

BRW

BRW BRW

121

343

Micro

BLU

221

CN42

(WHI)

Q200 ~ 205 IGBT

Power Relay

DB02

P31

Reactor

BRW

R221

R220

R219

+ + +

C12 C14

Relay

CN701 P07

112

Sheet

Metal

BLK

F01 Fuse T3.15A AC 250V

Q300 ~ 305 MOS-FET

R321

R320

R319

C13

P. C. Board

MCC-5009

F03 Fuse 250V ~, T3.15A

L01

Varistor

Surge

Absorber

11223

Fuse, T6.3A AC 250V

Coil for

4-way Valve

Indoor Terminal Block

113

CN01CN02 CN51

F01 Fuse 250V ~, T25A

BLK

WHI

CN300

CN700

CN603

CN602

CN601

CN600

P10

P03

BLK

ORN WHI

321

RED

P02

NL321

Power Supply 220-240V~, 50Hz / 220-230V~, 60Hz 220-240V~, 50Hz (RAS-18,22SKV-A, 18,22SKVR-A)

Heat Exchanger

3 2 1

6 5 4 3 3 2 2 1 1

3 2 1

212

3 2 1

212

GRN & YEL

BLK

WHI

2 1

6 5 4

RED

Fan Motor

PMV

Pulse Motor Valve

Suction pipe

Temp. Sensor

Discharge pipe

Temp. Sensor

Condenser pipe

Temp. Sensor

(TS)

(TO)

Outdoor

(TD)

(TE)

Heat Exchanger Sensor (TC)

Thermo Sensor (TA)

1 2 3

CN10

BLU BLU BLU BLU BLU BLU BLU BLU BLU BLU WHI

1 2 3 4 4 5 5 6 6 7 7 8 8

MCC-5044

9 9

10 10

Wireless Unit Assembly

11 11 11 11

(WHI)

121

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

10 10

CN21 (WHI)

CN62 (BLU)

CN61

(WHI)

1 2 3

Line Filter

Main P. C. Board

MCC-5045

Varistor

– 23 –

4 4

CN31

5 5

(WHI)

6 6

WHI

Circuit

2 3 4 5 5

1 2 3 4

CN22 (WHI)

CN32 (WHI)

DC5V

DC12V

Power Supply

YEL YEL YEL YEL

1 2 3 4 4 5 5

Fan Motor

DC Motor

1 2 3

Louver Motor

6-1. Indoor Unit

FILE NO. SVM-10050

6. SPECIFICATIONS OF ELECTRICAL PARTS

No.

Fan motor (for indoor)

Room temp. sensor (TA-sensor)

Heat exchanger temp. sensor (TC-sensor)

Louver motor

6-2. Outdoor Unit

No.

Reactor

Outdoor fan motor

Suction temp. sensor (TS sensor)

Parts name

Type

ICF-340-30-2Β

( — )

MP24Z3T

Model name

CH-57

ICF-140-43-4R

(Inverter attached)

Specifications

DC340V, 30W

10kΩ at 25°C

Output (Rated) 1W, 16 poles, DC12V

Rating

L = 10mH, 16A

DC140V, 43W

10kΩ (25°C)

Discharge temp. sensor (TD sensor)

Outside air temp. sensor (TO sensor)

Heat exchanger temp. sensor (TE sensor)

Terminal block (5P)

18SAV-E2, 18SAV2-E,

Compressor

Coil for PMV

Coil for 4-way valve

18SAV2-A

22SAV-E2, 22SAV2-E, 22SAV2-A

(Inverter attached)

——

DA130A1F-27F

DA150A1F-20F

CAM-MD12TCTH-2

STF

62kΩ (20°C)

10kΩ (25°C)

20A, AC250V

3-phases 4-poles 1100W

DC12V

AC220–240V

– 24 –

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-18SKV-E / RAS-18SAV-E2 RAS-18SKVR-E / RAS-18SAV-E2 RAS-18SKV2-E / RAS-18SAV2-E RAS-18SKV-A / RAS-18SAV2-A RAS-18SKVR-A / RAS-18SAV2-A RAS-18SKV-ND / RAS-18SAV2-E

FILE NO. SVM-10050

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe Outer dia. : 12.7mm

Thickness : 0.8mm

4-way valve (STF-0108Z)

Accumulater tank

Deoxidized copper pipe Outer dia. : 6.35mm

Thickness : 0.8mm

Muffler

Compressor DA130A1F-27F

INDOOR UNIT

Indoor heat

exchanger

Cross flow fan

Sectional shape of heat insulator

T1 Temp. measurement

difference: 10m

Allowable height

Strainer

Pulse Modulating valve at liquid side (CAM-B22YGTF-3)

Max. : 20m Min. : 2m Chargeless : 15m Charge : 20g/m

(16 to 20m)

Allowable pipe length

Outdoor heat exchanger

Propeller fan

Split capillary 2-dia. 1.2 × 80

Distributor

OUTDOOR UNIT

Refrigerant amount: 1.40kg

NOTE:

Refrigerant flow (Cooling) Refrigerant flow (Heating)

Gas leak check position

NOTE :

• The maximum pipe length of this air conditioner is 20m. When the pipe length exceeds 15m, the additional charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 100g)

– 25 –

RAS-22SKV-E / RAS-22SAV-E2 RAS-22SKVR-E / RAS-22SAV-E2 RAS-22SKV2-E / RAS-22SAV2-E RAS-22SKV-A / RAS-22SAV2-A RAS-22SKVR-A / RAS-22SAV2-A RAS-22SKV-ND / RAS-22SAV2-E

FILE NO. SVM-10050

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe Outer dia. : 12.7mm

Thickness : 0.8mm

4-way valve

0213Z

(STF-

Accumulater tank

)

Deoxidized copper pipe Outer dia. : 6.35mm

Thickness : 0.8mm

Muffler

Compressor

DA150A1F-20F

INDOOR UNIT

Indoor heat

exchanger

Cross flow fan

Sectional shape of heat insulator

T1 Temp. measurement

difference: 10m

Allowable height

Strainer

Pulse Modulating valve at liquid side (CAM-B22YGTF-3)

Max. : 20m Min. : 2m Chargeless : 15m Charge : 20g/m

(16 to 20m)

Allowable pipe length

Split capillary

Outdoor heat exchanger

Propeller fan

OUTDOOR UNIT

1 -dia. 2 × 100 2 - 4 -dia. 2 × 66

1 2

3 4

Distributor

NOTE:

Refrigerant flow (Cooling) Refrigerant flow (Heating)

Gas leak check position

NOTE :

• The maximum pipe length of this air conditioner is 15m. When the pipe length exceeds 15m, the additional charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 100g)

– 26 –

7-2. Operation Data

FILE NO. SVM-10050

Temperature

condition (°C)

Indoor Outdoor

27/19 35/24

Temperature

condition (°C)

Indoor Outdoor

20/15 7/6

Model name

RAS-

18SKV-E 18SKV2-E 18SKV-A 18SKV-ND

18SKVR-E

18SKVR-A

22SKV-E 22SKV2-E 22SKV-A 22SKV-ND

22SKVR-E 22SKVR-A

Model name

RAS-

18SKV-E 18SKV2-E 18SKV-A 18SKV-ND

18SKVR-E 18SKVR-A

22SKV-E 22SKV2-E 22SKV-A 22SKV-ND

22SKVR-E 22SKVR-A

Standard pressure

P (MPa)

0.9 to 1.1

0.9 to 1.1 High 77

Standard pressure

P (MPa)

2.5 to 2.6

2.6 to 2.8

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

11 to 13 40 to 42

11 to 13 41 to 43

11 to 13 41 to 43 High

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

40 to 42 1 to 3

42 to 44 0 to 2

42 to 44 0 to 2 High High

Indoor

fan mode

High

Indoor

fan mode

High

Outdoor

fan mode

High

Outdoor

fan mode

High

Compressor

revolution

Compressor

revolution

(rps)

NOTES :

1. Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent. (Thermistor themometer)

2. Connecting piping condition : 7.5 m

– 27 –

8. CONTROL BLOCK DIAGRAM

8-1. Indoor Unit

RAS-18SKV-E, RAS-18SKV2-E, RAS-18SKV-A, RAS-18SKV-ND RAS-22SKV-E, RAS-22SKV2-E, RAS-22SKV-A, RAS-22SKV-ND

FILE NO. SVM-10050-1

Heat Exchanger Sensor (Tc)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply Circuit

Converter (D.C circuit)

Noise Filter

From Outdoor Unit

220-240V ~50Hz 220-230V ~60Hz

220-240V~, 50Hz (RAS-18,22SKV-A)

M.C.U.

Functions

• Cold draft preventing Function

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing (Temperature Processing)

• Timer

• Serial Signal Communication

• Clean Function

Serial Signal Transmitter/Receiver

Serial Signal Communication

(Operation Command and Information)

Indoor Unit Control Unit

Louver

Motor

Louver Motor Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

REMOTE CONTROLLER

Remote Controller

Infrared Rays, 36.7kHz

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

COMFORT SLEEP

QUIET

SLEEP (1, 3, 5, 9 OFF TIMER)

– 28 –

RAS-18SKVR-E, RAS-18SKVR-A, RAS-22SKVR-E, RAS-22SKVR-A

FILE NO. SVM-10050-1

Heat Exchanger Sensor (Tc)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply Circuit

Converter (D.C circuit)

Noise Filter

M.C.U.

Functions

• Cold draft preventing Function

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing (Temperature Processing)

• Timer

• Serial Signal Communication

• Clean Function

Serial Signal Transmitter/Receiver

Indoor Unit Control Unit

Louver Motor

Drive Control

Indoor Fan

Motor Control

Louver

Motor

Indoor

Fan Motor

Air purifier

unit

Micro Switch

From Outdoor Unit

220-240V~, 50Hz 220-230V~, 60Hz

220-240V~, 50Hz (RAS-18,22SKVR-A)

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Infrared Rays, 36.7kHz

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

COMFORT SLEEP

QUIET

SLEEP (1, 3, 5, 9 OFF TIMER)

PURE (Air purifier)

– 29 –

8-2. Outdoor Unit (Inverter Assembly)

OUTDOOR UNIT

Outdoor

Fan motor

FILE NO. SVM-10050-1

Compressor

MICRO-COMPUTER BLOCK DIAGRAM

MCC5009 (P.C.B)

detect

Current

M.C.U.

circuit

Gate drive

• PWM synthesis function

• Input current release control

• IGBT over-current detect control

detect

Current

• Outdoor fan control

• High power factor correction control

• Inverter output frequency control

• A/D converter function

• PMV control

circuit

Gate drive

• Discharge temp. control

• 4-way valve control

• Signal communication to indoor unit

Inverter

(DC → AC)

Clock

4MHz

frequency

circuit

High Power

factor Correction

Inverter

(DC → AC)

Relay

Converter

(AC → DC)

Driver circuit

sensor

Input current

circuit

of PMV

PMV : Pulse Motor Valve

M.C.U.: Micro Control Unit

valve

4-way

PMV

220-240V~, 50Hz

220-230V~, 60Hz

For INDOOR UNIT

220-240V~, 50Hz (RAS-18,22SAV2-A)

circuit

Indoor unit

send/receive

Discharge

temp. sensor

Outdoor air

Suction

temp. sensor

– 30 –

temp. sensor

temp.sensor

Heat exchanger

Filter

Noise

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