Toshiba RAS-18, 22SKV-E, 22SKVR-E, 22SKVR-A, 22SKV-N Service Manual

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R410A

Revised on May, 2010

AIR-CONDITIONER

SPLIT TYPE

SERVICE MANUAL

Indoor Unit

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

RAS-18, 22SKV

2-E

RAS-18, 22SKV

-A

Outdoor Unit

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

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

RAS-18, 22SAV2-

FILE NO. SVM-10050-1

– 2 –

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

FILE NO. SVM-10050

– 3 –

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.

FILE NO. SVM-10050

– 4 –

• 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.

FILE NO. SVM-10050

– 5 –

Unit model

Indoor

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

Operation mode

Indoor

Running current (A) Power consumption (W)

Electric

Power factor (%) Operation mode

characteristic

Running current (A)

Outdoor Power consumption (W)

Power factor (%) Starting current (A)

COP Sound pressure

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A) Sound power

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A)

Unit model

Height (mm)

Dimension Width (mm) Indoor unit Depth (mm)

Net weight (kg)

Fan motor output (W)

Air flow rate (Cooling/Heating) (m³/min)

Unit model

Height (mm)

Dimension Width (mm)

Depth (mm)

Outdoor unit

Net weight (kg)

Motor output (W)

Compressor Type

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

Indoor unit

Liquid side (mm)

Gas side (mm)

Piping

Outdoor unit

Liquid side (mm)

connection Gas side (mm)

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m)

Refrigerant

Name of refrigerant Weight (kg)

Wiring connection

Power supply

Interconnection

Usable temperature range

Indoor (Cooling/Heating) (°C)

Outdoor (Cooling/Heating) (°C)

Installation plate

Wireless remote controller

Batteries

Remote controller holder

Toshiba New IAQ filter Indoor unit

Accessory

Remote controller holder

Pan head wood screw

Plasma air purifier

Installation manual

Owner’s manual

Outdoor unit

Drain nipple

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

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

Mounting screw

—

Water-proof rubber cap

FILE NO. SVM-10050

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

2-1. Specifications

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

2. SPECIFICATIONS

Unit model

Indoor

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

Operation mode

Indoor

Running current (A) Power consumption (W)

Electric

Power factor (%) Operation mode

characteristic

Running current (A)

Outdoor Power consumption (W)

Power factor (%) Starting current (A)

COP Sound pressure

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A) Sound power

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A)

Unit model

Height (mm)

Dimension Width (mm) Indoor unit Depth (mm)

Net weight (kg)

Fan motor output (W)

Air flow rate (Cooling/Heating) (m³/min)

Unit model

Height (mm)

Dimension Width (mm)

Depth (mm)

Outdoor unit

Net weight (kg)

Motor output (W)

Compressor Type

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

Indoor unit

Liquid side (mm)

Gas side (mm)

Piping

Outdoor unit

Liquid side (mm)

connection Gas side (mm)

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m)

Refrigerant

Name of refrigerant Weight (kg)

Wiring connection

Power supply

Interconnection

Usable temperature range

Indoor (Cooling/Heating) (°C)

Outdoor (Cooling/Heating) (°C)

Installation plate

Wireless remote controller

Batteries

Remote controller holder

Indoor unit

Accessory

Remote controller holder

Pan head wood screw

Plasma air purifier

Installation manual

Owner’s manual

Outdoor unit

Drain nipple

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

Mounting screw

Water-proof rubber cap

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

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

– 6 –

FILE NO. SVM-10050

Toshiba New IAQ filter

Unit model

Indoor

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

Operation mode

Indoor

Running current (A) Power consumption (W)

Electric

Power factor (%) Operation mode

characteristic

Running current (A)

Outdoor Power consumption (W)

Power factor (%) Starting current (A)

COP Sound pressure

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A) Sound power

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A)

Unit model

Height (mm)

Dimension Width (mm) Indoor unit Depth (mm)

Net weight (kg)

Fan motor output (W)

Air flow rate (Cooling/Heating) (m³/min)

Unit model

Height (mm)

Dimension Width (mm)

Depth (mm)

Outdoor unit

Net weight (kg)

Motor output (W)

Compressor Type

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

Indoor unit

Liquid side (mm)

Gas side (mm)

Piping

Outdoor unit

Liquid side (mm)

connection Gas side (mm)

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m)

Refrigerant

Name of refrigerant Weight (kg)

Wiring connection

Power supply

Interconnection

Usable temperature range

Indoor (Cooling/Heating) (°C)

Outdoor (Cooling/Heating) (°C)

Installation plate

Wireless remote controller

Batteries

Remote controller holder

Toshiba New IAQ filter Indoor unit

Accessory

Remote controller holder

Pan head wood screw

Plasma air purifier

Installation manual

Owner’s manual

Outdoor unit

Drain nipple

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

Mounting screw

Water-proof rubber cap

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

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

– 7 –

FILE NO. SVM-10050

——

Unit model

Indoor

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

Operation mode

Indoor

Running current (A) Power consumption (W)

Electric

Power factor (%) Operation mode

characteristic

Running current (A)

Outdoor Power consumption (W)

Power factor (%) Starting current (A)

COP Sound pressure

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A) Sound power

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A)

Unit model

Height (mm)

Dimension Width (mm) Indoor unit Depth (mm)

Net weight (kg)

Fan motor output (W)

Air flow rate (Cooling/Heating) (m³/min)

Unit model

Height (mm)

Dimension Width (mm)

Depth (mm)

Outdoor unit

Net weight (kg)

Motor output (W)

Compressor Type

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

Indoor unit

Liquid side (mm)

Gas side (mm)

Piping

Outdoor unit

Liquid side (mm)

connection Gas side (mm)

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m)

Refrigerant

Name of refrigerant Weight (kg)

Wiring connection

Power supply

Interconnection

Usable temperature range

Indoor (Cooling/Heating) (°C)

Outdoor (Cooling/Heating) (°C)

Installation plate

Wireless remote controller

Batteries

Remote controller holder

Toshiba New IAQ filter Indoor unit

Accessory

Remote controller holder

Pan head wood screw

Plasma air purifier

Installation manual

Owner’s manual

Outdoor unit

Drain nipple

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

Mounting screw

Water-proof rubber cap

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

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

– 8 –

FILE NO. SVM-10050-1

——

Unit model

Indoor

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

Operation mode

Indoor

Running current (A) Power consumption (W)

Electric

Power factor (%) Operation mode

characteristic

Running current (A)

Outdoor Power consumption (W)

Power factor (%) Starting current (A)

COP Sound pressure

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A) Sound power

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A)

Unit model

Height (mm)

Dimension Width (mm) Indoor unit Depth (mm)

Net weight (kg)

Fan motor output (W)

Air flow rate (Cooling/Heating) (m³/min)

Unit model

Height (mm)

Dimension Width (mm)

Depth (mm)

Outdoor unit

Net weight (kg)

Motor output (W)

Compressor Type

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

Indoor unit

Liquid side (mm)

Gas side (mm)

Piping

Outdoor unit

Liquid side (mm)

connection Gas side (mm)

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m)

Refrigerant

Name of refrigerant Weight (kg)

Wiring connection

Power supply

Interconnection

Usable temperature range

Indoor (Cooling/Heating) (°C)

Outdoor (Cooling/Heating) (°C)

Installation plate

Wireless remote controller

Batteries

Remote controller holder

Toshiba New IAQ filter Indoor unit

Accessory

Remote controller holder

Pan head wood screw

Plasma air purifier

Installation manual

Owner’s manual

Outdoor unit

Drain nipple

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

Mounting screw

Water-proof rubber cap

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

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

– 9 –

FILE NO. SVM-10050-1

Unit model

Indoor

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

Operation mode

Indoor

Running current (A) Power consumption (W)

Electric

Power factor (%) Operation mode

characteristic

Running current (A)

Outdoor Power consumption (W)

Power factor (%) Starting current (A)

COP Sound pressure

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A) Sound power

Indoor H / M+ / M / L+ / L (dB-A) level

Outdoor H (dB-A)

Unit model

Height (mm)

Dimension Width (mm) Indoor unit Depth (mm)

Net weight (kg)

Fan motor output (W)

Air flow rate (Cooling/Heating) (m³/min)

Unit model

Height (mm)

Dimension Width (mm)

Depth (mm)

Outdoor unit

Net weight (kg)

Motor output (W)

Compressor Type

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

Indoor unit

Liquid side (mm)

Gas side (mm)

Piping

Outdoor unit

Liquid side (mm)

connection Gas side (mm)

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m)

Refrigerant

Name of refrigerant Weight (kg)

Wiring connection

Power supply

Interconnection

Usable temperature range

Indoor (Cooling/Heating) (°C)

Outdoor (Cooling/Heating) (°C)

Installation plate

Wireless remote controller

Batteries

Remote controller holder

Toshiba New IAQ filter Indoor unit

Accessory

Remote controller holder

Pan head wood screw

Plasma air purifier

Installation manual

Owner’s manual

Outdoor unit

Drain nipple

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

Mounting screw

Water-proof rubber cap

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

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

– 10 –

FILE NO. SVM-10050

——

– 11 –

120

100

Outdoor Temperature (°C)

100

105

10.00

9.00

8.00

7.00

6.00

5.00

4.00

3.00

2.00

1.00

0.00

10.00

9.00

8.00

7.00

6.00

5.00

4.00

3.00

2.00

1.00

0.00

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

0 102030405060708090100110120 0 102030405060708090100110120

–10–50 510

Outdoor Temperature (°C)

Compressor Speed (RPS)

Capacity Ratio (%)

Current (A)

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

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

Capacity Ratio: 100% =

5.0kW (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-18SKV-E RAS-18SKVR-E

2-2. Operation Characteristic Curve

2-3. Capacity Variation Ratio According to Temperature

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

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

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

RAS-22SKV-E RAS-22SKVR-E

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

RAS-18SKV-E RAS-18SKVR-E

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

RAS-18SKV-E RAS-18SKVR-E

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

RAS-22SKV-E RAS-22SKVR-E

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

RAS-18SKV-E RAS-18SKVR-E

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

RAS-22SKV-E RAS-22SKVR-E

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

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

Capacity Ratio: 100% =

5.8

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

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

FILE NO. SVM-10050

– 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 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.

FILE NO. SVM-10050

– 13 –

Table 3-2-1 Thicknesses of annealed copper pipes

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

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

Nominal diameter

1/4

3/8

1/2

5/8

Outer diameter (mm)

6.35

9.52

12.70

15.88

Thickness (mm)

R410A R22

0.80 0.80

1.00 1.00

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

FILE NO. SVM-10050

– 14 –

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.

Fig. 3-2-1 Flare processing dimensions

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

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

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

Nominal

Outer

Thickness

diameter

(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

A (mm)

Flare tool for R22

clutch type

0 to 0.5

Conventional flare tool

Clutch type Wing nut type

0.5 to 1.0 1.0 to 1.5

0.5 to 1.0 1.5 to 2.0

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

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

Flare nut width

(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

Nominal

Outer

Thickness

diameter

(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

A (mm)

Flare tool for R410A

clutch type

0 to 0.5

FILE NO. SVM-10050

– 15 –

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

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 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

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

Flare nut width

(mm)

43˚ to 45˚

45˚ to 46˚

B A

Tightening torque of

torque wrenches available on the market

N•m (kgf•cm)

16 (160), 18 (180)

42 (420)

55 (550)

65 (650)

Nominal

Outer

Tightening torque

diameter

(mm)

N•m (kgf•cm)

1/4 6.35 14 to 18 (140 to 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)

FILE NO. SVM-10050

– 16 –

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

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

(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.

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

R410A

air-water heat pump installation

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

FILE NO. SVM-10050

– 17 –

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

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

(For refrigerant charging, see the figure below.)

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.

(Indoor unit)

(Outdoor unit)

Opened

Refrigerant cylinder

(with siphon)

Check valve

Open/close valve for charging

Electronic balance for refrigerant charging

Opened

Closed

Service port

3-4. Recharging of Refrigerant

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

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.

Fig. 3-4-1 Configuration of refrigerant charging

FILE NO. SVM-10050

– 18 –

Gauge manifold

[ Cylinder with siphon ] [ Cylinder without siphon ]

OUTDOOR unit

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Electronic

balance

Refrigerant

cylinder

Electronic

balance

Siphon

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.

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.

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.

Fig. 3-4-2

FILE NO. SVM-10050

– 19 –

Nitrogen gas

cylinder

Pipe

Flow meter

Stop valve

From Nitrogen cylinder

Nitrogen gas

Rubber plug

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

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 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.

Fig. 3-5-1

Prevention of oxidation during brazing

Piping material

Copper - Copper

Copper - Iron

Iron - Iron

Used brazing filler

Phosphor copper

Silver

Used flux

Do not use

Paste flux

Vapor flux

FILE NO. SVM-10050

– 20 –

4. CONSTRUCTION VIEWS

4-1. Indoor Unit

1050

132 568

132

320

235 235 215 215

47 215.5 262.5 262.5 153.5 109

786 132

200 150

228

73.5

320

73.5

Front panel

Air filter

Heat exchanger

Installation plate hanger

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

Drain hose (0.5mm)

Hanger

HangerHanger

Center line Instrallation plate outline

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

Air ionizer

Air inlet Plasma air purifier

Knock out system Knock out system

FILE NO. SVM-10050

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

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

157

Wireless remote controller

125

Remote controller holder

– 21 –

1050

132 568 200 150

72 78

228

320

132 786

235

47 215.5 262.5 262.5 153.5 109

235

215 215

132

320

73.5

Front panel

Air filter

Heat exchanger

Installation plate hanger

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

Drain hose (0.5mm)

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

Air inlet

Knock out system Knock out system

Hanger

Center line Instrallation plate outline

Hanger

157

Wireless remote controller

125

Remote controller holder

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

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

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

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

FILE NO. SVM-10050

– 22 –

4-2. Outdoor Unit

320

306

Z View

600

A detail Drawing (Back leg)

320

306

25 Drain outlet

11 x 14

Hole

(For 8 -

10 anchor bolt)

B Detail Drawing (Front leg)

FAN-GUARD

COVER-PV

Electrical part cover

Liquid side

(Flare 6.35)

(Flare ∅ 12.7)

Gas side

Service port

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

Installation dimension

Air outlel

100 or more

600 or more

Air intlel

6 hole

11x14 hole

320

R5.5

108 125

137

600

320

9060090

275

290

550

436

320 342

2 - R5-5 x 17L Ushape

(For ∅ 8 - ∅10 anchor bolt)

FILE NO. SVM-10050

– 23 –

5. WIRING DIAGRAM

5-1. Indoor Unit / Outdoor Unit

P22

Compressor

P. C. Board

MCC-5009

Main P. C. Board

MCC-5045

SKVR-E only

RED WHI

BLK

P04 P05 P06

P25

YEL

P24

R221

Q200 ~ 205 IGBT

Q300 ~ 305 MOS-FET

CN300

CN700

CN603

CN602

CN601

CN600

Suction pipe

Temp. Sensor

(TS)

Fan Motor

Pulse Motor Valve

1 2 3

1 2

P11

P08

P32

PUR

P33 P30 BLK

CN701 P07

BLK

ORN WHI

P03

P10

P02

P31

Q404

BLU BLU BLU

1 2 3

BLU

RED

BRW

BLU

BRW

BRW BRW

4 4

BLU

5 5

BLU

6 6

BLU

7 7

BLU

8 8

BLU

9 9

BLU

CN10 (WHI)

CN61 (WHI)

10 10

1 2 3

4 4

221

4433221

5 5 6 6 7 7 8 8 9 9

CN21 (WHI)

10 10

BLK WHI

RED

3 2 1

6 5 4

6 5

4 3 3 2 2 1 1

3 2 1

P23

YEL

P34

P35 L03

L01

Varistor

Line Filter

Surge

Absorber

F01 Fuse 250V ~, T25A

Fuse, T6.3A AC 250V

Power Relay

Relay

DB01

DB02

C12 C14

C13

YEL

P21

BRW

P20

R220

R219

PMV

Discharge pipe

Temp. Sensor

(TD)

3 2 1

Condenser pipe

Temp. Sensor

(TE)

212

Thermo Sensor (TA)

121

CN62 (BLU)

Heat Exchanger Sensor (TC)

121

CN42

(WHI)

CN01CN02 CN51

121

343

Outdoor

Temp. Sensor

(TO)

212

R321

R320

R319

P19

P18

Reactor

Coil for

4-way Valve

Indoor Terminal Block

Wireless Unit Assembly

MCC-5044

ORN

+ + +

121

112

11223

F03 Fuse 250V ~, T3.15A

NL321

WHI YEL YEL

1 2 3

YEL

1 2 3 4

YEL

5 5

CN22 (WHI)

CN32 (WHI)

CN31 (WHI)

Louver Motor

Fan Motor

1 2 3

1 2

3 4 4 5 5

4 4

BLK

Sheet

Metal

Micro

WHI

RED

5 5

GRN & YEL

Heat Exchanger

6 6

WHI

11 11 11 11

DC Motor

Power Supply

Circuit

DC5V

DC12V

113

High-voltage

Power Supply

Air Purifier

Electrode

Ion

Electrode

F01 Fuse T3.15A AC 250V

321

121

343

FILE NO. SVM-10050-1

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

Power Supply 220-240V~, 50Hz / 220-230V~, 60Hz

– 24 –

6. SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

6-2. Outdoor Unit

No.

Room temp. sensor (TA-sensor)

Heat exchanger temp. sensor (TC-sensor)

Louver motor

ICF-340-30-2Β

( — )

MP24Z3T

DC340V, 30W

10kΩ at 25°C

Output (Rated) 1W, 16 poles, DC12V

No.

Parts name

Reactor

Outdoor fan motor

Suction temp. sensor (TS sensor)

Discharge temp. sensor (TD sensor)

Outside air temp. sensor (TO sensor)

Heat exchanger temp. sensor (TE sensor)

Terminal block (5P)

Compressor

Coil for PMV

Model name

CH-57

ICF-140-43-4R

(Inverter attached)

——

DA130A1F-27F

DA150A1F-20F

CAM-MD12TCTH-2

Rating

L = 10mH, 16A

DC140V, 43W

10kΩ (25°C)

62kΩ (20°C)

10kΩ (25°C)

20A, AC250V

3-phases 4-poles 1100W

DC12V

AC220–240V

FILE NO. SVM-10050

Fan motor (for indoor)

Parts name

Type

Specifications

Coil for 4-way valve

STF

22SAV-E2, 22SAV2-E,

18SAV-E2, 18SAV2-E,

18SAV2-A

22SAV2-A

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)

Max. : 20m Min. : 2m Chargeless : 15m Charge : 20g/m (16 to 20m)

Deoxidized copper pipe Outer dia. : 12.7mm

Thickness : 0.8mm

NOTE:

Gas leak check position Refrigerant flow (Cooling) Refrigerant flow (Heating)

INDOOR UNIT

T1 Temp. measurement

Indoor heat

exchanger

Cross flow fan

Sectional shape of heat insulator

Allowable height

difference: 10m

Allowable pipe length

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Strainer

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

4-way valve (STF-0108Z)

Compressor DA130A1F-27F

Propeller fan

Refrigerant amount: 1.40kg

OUTDOOR UNIT

Outdoor heat exchanger

Split capillary 2-dia. 1.2 × 80

Muffler

Accumulater tank

Deoxidized copper pipe Outer dia. : 6.35mm

Thickness : 0.8mm

Distributor

FILE NO. SVM-10050

– 25 –

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

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

– 26 –

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)

Strainer

Max. : 20m Min. : 2m Chargeless : 15m Charge : 20g/m (16 to 20m)

Allowable height

difference: 10m

Allowable pipe length

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

NOTE:

Gas leak check position Refrigerant flow (Cooling) Refrigerant flow (Heating)

OUTDOOR UNIT

INDOOR UNIT

T1 Temp. measurement

Indoor heat

exchanger

Cross flow fan

Deoxidized copper pipe Outer dia. : 12.7mm

Thickness : 0.8mm

Sectional shape of heat insulator

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe Outer dia. : 6.35mm

Thickness : 0.8mm

4-way valve (STF-

0213Z

)

Compressor

DA150A1F-20F

Muffler

Accumulater tank

Propeller fan

Outdoor heat exchanger

Distributor

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

1 -dia. 2 × 100 2 - 4 -dia. 2 × 66

Split capillary

1 2

– 27 –

7-2. Operation Data

Temperature

condition (°C)

Indoor Outdoor

Model name

RAS-

18SKVR-E

Standard pressure

P (MPa)

0.9 to 1.1

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

11 to 13 40 to 42

11 to 13 41 to 43

Indoor

fan mode

High

Outdoor

fan mode

High

Compressor

revolution

(rps)

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

18SKVR-A

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

22SKVR-E 22SKVR-A

11 to 13 41 to 43 High

0.9 to 1.1

0.9 to 1.1 High 77

2.5 to 2.6

2.6 to 2.8

40 to 42 1 to 3

42 to 44 0 to 2

42 to 44 0 to 2 High High

Temperature

condition (°C)

Indoor Outdoor

Model name

RAS-

18SKVR-E

Standard pressure

P (MPa)

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

Indoor

fan mode

High

Outdoor

fan mode

High

Compressor

revolution

(rps)

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

18SKVR-A

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

22SKVR-E 22SKVR-A

20/15 7/6

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

27/19 35/24

FILE NO. SVM-10050

– 28 –

REMOTE CONTROLLER

QUIET

Remote Controller

Infrared Rays, 36.7kHz

Hi-POWER

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

COMFORT SLEEP

ECO

Louver Direction Setting

Louver AUTO Swing

OFF TIMER Setting

ON TIMER Setting

Fan Speed Selection

Thermo. Setting

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN

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

Heat Exchanger Sensor (Tc)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Power Supply Circuit

Converter (D.C circuit)

Noise Filter

Clock Frequency

Oscillator Circuit

M.C.U.

From Outdoor Unit

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

Serial Signal Transmitter/Receiver

Serial Signal Communication

(Operation Command and Information)

Indoor Unit Control Unit

Louver Motor Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

Louver

Motor

QUIET

Operation (START/STOP)

8. CONTROL BLOCK DIAGRAM

FILE NO. SVM-10050-1

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

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

– 29 –

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

REMOTE CONTROLLER

QUIET

Remote Controller

Infrared Rays, 36.7kHz

Hi-POWER

PURE (Air purifier)

COMFORT SLEEP

ECO

Louver Direction Setting

Louver AUTO Swing

OFF TIMER Setting

ON TIMER Setting

Fan Speed Selection

Thermo. Setting

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN

Operation (START/STOP)

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

Heat Exchanger Sensor (Tc)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Power Supply Circuit

Converter (D.C circuit)

Noise Filter

Clock Frequency

Oscillator Circuit

M.C.U.

From Outdoor Unit

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

Serial Signal Transmitter/Receiver

Serial Signal Communication

(Operation Command and Information)

Indoor Unit Control Unit

Louver Motor Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

Air purifier

unit

Louver

Motor

Micro Switch

QUIET

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

FILE NO. SVM-10050-1

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

– 30 –

8-2. Outdoor Unit (Inverter Assembly)

Driver circuit

of PMV

Relay

circuit

Clock

frequency

4MHz

Converter

(AC → DC)

Inverter

(DC → AC)

Inverter

(DC → AC)

Input current

sensor

High Power

factor Correction

circuit

MICRO-COMPUTER BLOCK DIAGRAM

For INDOOR UNIT

Heat exchanger

temp.sensor

Suction

temp. sensor

Outdoor air

temp. sensor

Discharge

temp. sensor

Indoor unit

send/receive

circuit

Noise

Filter

MCC5009 (P.C.B)

• PWM synthesis function

• Input current release control

• IGBT over-current detect control

• Outdoor fan control

• High power factor correction control

• Inverter output frequency control

• A/D converter function

• PMV control

• Discharge temp. control

• 4-way valve control

• Signal communication to indoor unit

PMV : Pulse Motor Valve

M.C.U.: Micro Control Unit

Outdoor

Fan motor

Compressor

OUTDOOR UNIT

PMV

4-way

valve

Gate drive

circuit

Current

detect

Current

detect

Gate drive

circuit

M.C.U.

FILE NO. SVM-10050-1

220-240V~, 50Hz

220-230V~, 60Hz

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

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