Toshiba RAS-07PKVP-E User manual

Toshiba
Model name:
Outdoor Unit
<Heat Pump Type>
(Standard Type)
RAS-07PAVP-E
RAS-10PAVP-E
RAS-13PAVP-E
RAS-16PAVP-E
RAS-18PAVP-E
(North Europe Type)
RAS-07PAVP-ND
RAS-10PAVP-ND
RAS-13PAVP-ND
RAS-16PAVP-ND
RAS-18PAVP-ND
AIR-CONDITIONER (SPLIT TYPE)
Indoor Unit
<High Wall, Heat Pump Type>
(Standard Type)
RAS-07PKVP-E
RAS-10PKVP-E
RAS-13PKVP-E
RAS-16PKVP-E
RAS-18PKVP-E
(North Europe Type)
RAS-07PKVP-ND
RAS-10PKVP-ND
RAS-13PKVP-ND
RAS-16PKVP-ND
RAS-18PKVP-ND
SERVICE MANUAL
FILE NO. A08-010
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Contents
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 REFRIGERANT R410A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 CONSTRUCTION VIEWS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4 WIRING DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5 SPECIFICATIONS OF ELECTRICAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6 REFRIGERANT CYCLE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7 CONTROL BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8 OPERATION DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8-1. Outline of Air Conditioner Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8-1-1. Role of Indoor Unit Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8-1-2. Role of outdoor unit controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8-1-3. Contents of Operation Command Signal (Serial Signal) . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8-2. Basic Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8-2-1. Operation Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8-2-2. Cooling/Heating Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8-2-3. AUTO Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8-2-4. DRY Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8-3. Indoor Fan Motor Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8-3-1. In Cooling Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8-3-2. In Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8-4. Outdoor Fan Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8-5. Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8-6. Current Release Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8-7. Release Protective control by Temperature of Indoor Heat Exchanger . . . . . . . . . . . . . . . . . . . . . 39
8-7-1. In Cooling/Dry Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8-7-2. In heating operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8-8. Defrost Control (Only in Heating Operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8-8-1. Defrost Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8-8-2. Finish of Defrost Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8-8-3. Returning from defrost operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8-9. Louver Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8-9-1. Louver Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8-9-2. Air Direction Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8-9-3. Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8-10. SLEEP MODE Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
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8-10-1. Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8-10-2. Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8-11. Temporary Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8-12. Air Purifying Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
8-12-1. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
8-12-2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
8-12-3. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8-13. Discharge Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8-13-1. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8-13-2. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8-14. Pulse Motor Valve (PMV) Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
8-15. Clean Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
8-15-1. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
8-15-2. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
8-15-3. Setting the Clean Operation Cancel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8-15-4. Setting the Clean Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8-16. Select Switch on Remote Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8-16-1. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8-16-2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8-16-3. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8-16-4. Setting the Remote Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8-17. Set Temperature Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8-17-1. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8-17-2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8-18. Outdoor Quiet Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8-18-1. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8-18-2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8-18-3. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8-19. 8°C HEAT Operation (-ND Model Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8-19-1. Start 8°C HEAT Operation When the Air Conditioner is Stopped . . . . . . . . . . . . . . . . . . . 50
8-19-2. Start 8°C HEAT Operation When the Air Conditioner is Operating . . . . . . . . . . . . . . . . . . 50
8-19-3. Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8-19-4. Indoor Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
8-19-5. Compressor Speed Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8-20. Cord Heater Control (-ND Model Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8-20-1. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8-20-2. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8-21. Auto Restart Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8-21-1. Setting the Auto Restart Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8-21-2. Cancelling the Auto Restart Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
8-21-3. Power Failure During Timer Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
8-22. Remote Controller and Its Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
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8-22-1. Parts Name of Remote Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8-22-2. Name and Functions of Indications on Remote Controller. . . . . . . . . . . . . . . . . . . . . . . . . 55
8-23. Hi POWER Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8-23-1. In Automatic Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8-23-2. In Cooling Operation (Manual) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8-23-3. In Heating operation (Manual) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9 INSTALLATION PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
11 REPLACING THE MAIN PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
12 EXPLODED VIEWS AND PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
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SAFETY PRECAUTIONS
The important contents concerned to the safety are described on the product itself and on this Service Manual.
Please read this Service Manual after understanding the described items thoroughly in the following contents
(Indications/Illustrated marks), and keep them.
[Explanation of indications]
*Property damage : Enlarged damage concerned to property, furniture, and domestic animal/pet
[Explanation of illustrated marks]
• 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.
Indication Explanation
DANGER Indicates contents assumed that an imminent danger causing a death or serious injury of the
repair engineers and the third parties when an incorrect work has been executed.
WARNING Indicates possibilities assumed that a danger causing a death or serious injury of the repair
engineers, the third parties, and the users due to troubles of the product after work when an
incorrect work has been executed.
CAUTION Indicates contents assumed that an injury or property damage (*) may be caused on the repair
engineers, the third parties, and the users due to troubles of the product after work when an
incorrect work has been executed.
Mark Explanation
Indicates prohibited items (Forbidden items to do)
The sentences near an illustrated mark describe the concrete prohibited contents.
Indicates mandatory items (Compulsory items to do)
The sentences near an illustrated mark describe the concrete mandatory contents.
Indicates cautions (including danger/warning)
The sentences or illustration near or in an illustrated mark describe the concrete cautious contents.
For general public use
Power supply cord of outdoor unit shall be 1.5 mm ² (H07RN-F or 60245IEC66) polychloroprene sheathed flexible
cord.
CAUTION
New Refrigerant Air Conditioner Installation
• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE
LAYER.
R410Arefrigerantis aptto beaffectedby impurities suchas water, oxidizingmembrane,and oils becausethe 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.
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CAUTION
TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY
A switch or circuit breaker that can disconnect all poles must be included in the fixed wiring.
Be sure to use an approved circuit breaker or switch.
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.
HIGH VOLTAGE
The high voltage circuit is incorporated.
Be careful to do the check service, as the electric shock may be caused in case of touching parts
on the P.C. board by hand.
• CORRECTLY CONNECT THE CONNECTING CABLE. IF THE CONNECTING CABLE IS INCORRECTLY CONNECTED,
ELECTRIC PARTS MAY BE DAMAGED.
• CHECK THAT THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE SERVICE AND INSTALLATION.
FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.
• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS
INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.
• 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 REGISTORS, FURNACE, STOVES,
ETC.
• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL NOT TO
ALLOWTHE SPECIFIED REFRIGERANT (R410A)TO BECOME MIXEDWITH ANY OTHERGASEOUS BODY INTOTHE
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.
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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: RAS-∗∗ PAVP-E model
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.
(RAS-∗∗ PAVP-ND model has a heater on the bottom plate of the outdoor unit.)
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1SPECIFICATIONS
1-1. Specifications
RAS-07PKVP-E/RAS-10PKVP-E/RAS-13PKVP-E, RAS-07PAVP-E/RAS-10PAVP-E/RAS-13PAVP-E
RAS-07PKVP-ND/RAS-10PKVP-ND/RAS-13PKVP-ND, RAS-07PAVP-ND/RAS-10PAVP-ND/
RAS-13PAVP-ND
• The specifications may be subject to change without notice for purpose of improvement.
Unit model Indoor RAS-07PKVP-E(-ND) RAS-10PKVP-E(-ND) RAS-13PKVP-E(-ND)
Outdoor RAS-07PAVP-E(-ND) RAS-10PAVP-E(-ND) RAS-13PAVP-E(-ND)
Cooling capacity (kW) 2.0 2.5 3.5
Cooling capacity range (kW) 0.3-3.0 0.3-3.5 0.3-4.5
Heating capacity (kW) 2.5 3.0 4.0
Heating capacity range (kW) 0.3-5.0 0.3-5.8 0.3-6.1
Power supply 1 Ph/50Hz/220–240 V, 1 Ph/60Hz/220-230 V
Electric
characteristics
Indoor
Operation mode Cooling Heating Cooling Heating Cooling Heating
Running current (220/230/240V) (A) 0.21/0.20/0.19 0.24/0.23/0.22
Power consumption (W) 25 30
Power factor (220/230/240V) (%) 54/54/55 57
Outdoor
Operation mode Cooling Heating Cooling Heating Cooling Heating
Running current (220/230/240V) (A) 1.86/1.78/1.70 2.35/2.25/2.15 2.19/2.10/2.01 2.56/2.45/2.35 3.44/3.29/3.15 3.77/3.61/3.46
Power consumption (220/230/240V) (W) 330 415 450 535 740 810
Powerfactor (%)81809395 98
Starting current(220/230/240V) (A) 2.56/2.45/2.34 2.77/2.65/2.54 4.01/3.84/3.68
COP (Cooling/Heating) 5.63/5.68 5.26/5.36 4.55/4.76
Operating
noise Indoor High (Cooling/Heating) (dB-A) 42/42 43/43 45/45
Medium (Cooling/Heating) (dB-A) 34/34 35/35 36/36
Low (Cooling/Heating) (dB-A) 26/26 27/27
Outdoor (Cooling/Heating) (dB-A) 46/46 48/48 50/50
Indoor unit
Unit model RAS-07PKVP-E (-ND) RAS-10PKVP-E (-ND) RAS-13PKVP-E (-ND)
Dimension Height (mm) 295
Width (mm) 790
Depth (mm) 242
Net weight (kg) 12
Fan motor output (W) 30
Air flow rate (Cooling/Heating)
(m³/min.) 10.2/10.8 10.4/11.1 11.6/11.6
Outdoor unit
Unit model RAS-07PAVP-E (-ND) RAS-10PAVP-E (-ND) RAS-13PAVP-E (-ND)
Dimension Height (mm) 550
Width (mm) 780
Depth (mm) 290
Net weight (kg) 39 40
Compressor Motor output (W) 750
Type Twin rotary type (Variable Cylinder Management)
Model DA111A1FD-21F
Fan motor output (W) 43
Air flow rate (Cooling/Heating) (m³/min.) 27.7/25.5 30.0/27.7 37.2/34.8
Piping
connection
Type Flare connection
Indoor unit Liquid side Ø6.35
Gas side Ø9.52
Outdoor unit Liquid side Ø6.35
Gas side Ø9.52
Maximum length (m) 20
Maximum chargeless length (m) 15
Maximum height difference (m) 10
Refrigerant Name of refrigerant R410A
Weight (kg) 1.12 1.15
Wiring
connection Power cord 3 Wires : includes earth line (Outdoor)
Connecting cable 4 Wires : includes earth line
Usable temperature
range
Indoor (Cooling/Heating) (°C) 21–32/0–28
Outdoor (Cooling/Heating) (°C) –10–46/–15–24
Accessory Indoor unit
Installation plate 1
Wireless remote controller 1
Batteries 2
Remote controller holder 1
Mounting screw 7 (Ø4 × 25L)
Remote controller holder mounting screw 2 (Ø3.1 × 16L)
Installation manual 1
Owner’s manual 1
Outdoor unit Drain nipple 1
Water-proof rubber cap 2
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RAS-16PKVP-E/RAS-18PKVP-E, RAS-16PAVP-E/RAS-18PAVP-E
RAS-16PKVP-ND/RAS-18PKVP-ND, RAS-16PAVP-ND/RAS-18PAVP-ND
• The specifications may be subject to change without notice for purpose of improvement.
Unit model Indoor RAS-16PKVP-E(-ND) RAS-18PKVP-E(-ND)
Outdoor RAS-16PAVP-E(-ND) RAS-18PAVP-E(-ND)
Cooling capacity (kW) 4.5 5.0
Cooling capacity range (kW) 0.3-5.0 0.3-5.5
Heating capacity (kW) 5.5 6.0
Heating capacity range (kW) 0.3-6.5 0.3-6.7
Power supply 1 Ph/50Hz/220–240 V, 1 Ph/60Hz/220-230 V
Electric
characteristics
Indoor
Operation mode Cooling Heating Cooling Heating
Running current(220/230/240V) (A) 0.27/0.26/0.25 0.30/0.29/0.28
Power consumption (W) 35 40
Power factor (220/230/240V) (%) 59/59/58 61/60/60
Outdoor
Operation mode Cooling Heating Cooling Heating
Running current (220/230/240V) (A) 5.54/5.30/5.08 5.97/5.71/5.47 6.68/6.39/6.12 6.86/6.56/6.29
Power consumption (W) 1195 1305 1450 1500
Power factor (%) 98 99
Starting current(220/230/240V) (A) 6.24/5.97/5.72 7.16/6.85/6.57
COP (Cooling/Heating) 3.69/4.10 3.36/3.90
Operating
noise Indoor High (Cooling/Heating) (dB-A) 47/47 49/49
Medium (Cooling/Heating) (dB-A) 38/38 41/41
Low (Cooling/Heating) (dB-A) 30/30 31/31
Outdoor (Cooling/Heating) (dB-A) 50/50 52/52
Indoor unit
Unit model RAS-16PKVP-E (-ND) RAS-18PKVP-E (-ND)
Dimension Height (mm) 295
Width (mm) 790
Depth (mm) 242
Net weight (kg) 12
Fan motor output (W) 30
Air flow rate (Cooling/Heating) (m³/min.) 12.4/12.4 13.4/13.4
Outdoor unit
Unit model RAS-16PAVP-E (-ND) RAS-18PAVP-E (-ND)
Dimension Height (mm) 550
Width (mm) 780
Depth (mm) 290
Net weight (kg) 40
Compressor Motor output (W) 750
Type Twin rotary type (Variable Cylinder Management)
Model DA111A1FD-21F
Fan motor output (W) 43
Air flow rate (Cooling/Heating) (m³/min.) 37.2/34.8 39.5/37.2
Piping
connection
Type Flare connection
Indoor unit Liquid side Ø6.35
Gas side Ø12.7
Outdoor unit Liquid side Ø6.35
Gas side Ø12.7
Maximum length (m) 20
Maximum chargeless length (m) 15
Maximum height difference (m) 10
Refrigerant Name of refrigerant R410A
Weight (kg) 1.15
Wiring
connection Power cord 3 Wires : includes earth line (Outdoor)
Connecting cable 4 Wires : includes earth line
Usable temperature
range
Indoor (Cooling/Heating) (°C) 21–32/0–28
Outdoor (Cooling/Heating) (°C) –10–46/–15–24
Accessory Indoor unit
Installation plate 1
Wireless remote controller 1
Batteries 2
Remote controller holder 1
Mounting screw 7 (Ø4 × 25L)
Remote controller holder mounting screw 2 (Ø3.1 × 16L)
Installation manual 1
Owner’s manual 1
Outdoor unit Drain nipple 1
Water-proof rubber cap 2
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1-2. Operation Characteristic Curve
RAS-07PKVP-E(-ND)
RAS-10PKVP-E(-ND)
RAS-13PKVP-E(-ND)
Cooling Heating
Cooling Heating
Cooling Heating
10 20 30 40 50 60 70 8009011
0
100
Compressor speed (rps)
0
1
3
5
6
4
2
7
8
9
Current (A)
2 cylinder
operation
1 cylinder
operation
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB27°C/WB19°C
Outdoor: DB35°C
Airflow: High
Pipe length: 5m
10 20 30 40 50 60 70 8009011
0
100
Compressor speed (rps)
0
1
3
5
6
4
2
7
8
9
Current (A)
2 cylinder
operation
1 cylinder
operation
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB20°C
Outdoor: DB7°C/WB6°C
Airflow: High
Pipe length: 5m
10 20 30 40 50 60 70 8009011
0
100
Compressor speed (rps)
0
1
3
5
6
4
2
7
8
9
Current (A)
2 cylinder
operation
1 cylinder
operation
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB27°C/WB19°C
Outdoor: DB35°C
Airflow: High
Pipe length: 5m
10 20 30 40 50 60 70 8009011
0
100
Compressor speed (rps)
0
1
3
5
6
4
2
7
8
9
Current (A)
2 cylinder
operation
1 cylinder
operation
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB20°C
Outdoor: DB7°C/WB6°C
Airflow: High
Pipe length: 5m
10 20 30 40 50 60 70 8009011
0
100
Compressor speed (rps)
0
1
3
5
6
4
2
7
8
9
Current (A)
2 cylinder
operation
1 cylinder
operation
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB27°C/WB19°C
Outdoor: DB35°C
Airflow: High
Pipe length: 5m
10 20 30 40 50 60 70 8009011
0
100
Compressor speed (rps)
0
1
3
5
6
4
2
7
8
9
Current (A)
2 cylinder
operation
1 cylinder
operation
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB20°C
Outdoor: DB7°C/WB6°C
Airflow: High
Pipe length: 5m
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RAS-16PKVP-E(-ND)
RAS-18PKVP-E(-ND)
Cooling Heating
Cooling Heating
10 20 30 40 50 60 70 8009011
0
100
Compressor speed (rps)
0
1
3
5
6
4
2
7
8
9
Current (A)
2 cylinder
operation
1 cylinder
operation
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB27°C/WB19°C
Outdoor: DB35°C
Airflow: High
Pipe length: 5m
10 20 30 40 50 60 70 80090110100
Compressor speed (rps)
0
1
3
5
6
4
2
7
8
9
Current (A)
2 cylinder
operation
1 cylinder
operation
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB20°C
Outdoor: DB7°C/WB6°C
Airflow: High
Pipe length: 5m
10 20 30 40 50 60 70 8009011
0
100
Compressor speed (rps)
0
1
3
5
6
4
2
7
8
9
Current (A)
2 cylinder
operation
1 cylinder
operation
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB27°C/WB19°C
Outdoor: DB35°C
Airflow: High
Pipe length: 5m
10 20 30 40 50 60 70 80090110100
Compressor speed (rps)
0
1
3
5
6
4
2
7
8
9
Current (A)
2 cylinder
operation
1 cylinder
operation
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB20°C
Outdoor: DB7°C/WB6°C
Airflow: High
Pipe length: 5m
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1-3. Capacity Variation Ratio According to Temperature
RAS-07PKVP-E(-ND), RAS-10PKVP-E(-ND), RAS-13PKVP-E(-ND)
RAS-16PKVP-E(-ND)
RAS-18PKVP-E(-ND)
Cooling Heating
Cooling Heating
Cooling Heating
25 30 35 40 4520 Outdoor temperature (°C)
40
50
70
90
100
80
60
110
120
Capacity ratio (%)
Conditions
Indoor: DB27°C/WB19°C
Indoor air flow: High
Pipe length: 5m
-10 -5 0 5 10-15 Outdoor temperature (°C)
40
50
70
90
100
80
60
110
120
Capacity ratio (%)
Conditions
Indoor: DB20°C
Indoor air flow: High
Pipe length: 5m
25 30 35 40 4520 Outdoor temperature (°C)
40
50
70
90
100
80
60
110
120
Capacity ratio (%)
Conditions
Indoor: DB27°C/WB19°C
Indoor air flow: High
Pipe length: 5m
-10 -5 0 5 10-15 Outdoor temperature (°C)
40
50
70
90
100
80
60
110
120
Capacity ratio (%)
Conditions
Indoor: DB20°C
Indoor air flow: High
Pipe length: 5m
25 30 35 40 4520 Outdoor temperature (°C)
40
50
70
90
100
80
60
110
120
Capacity ratio (%)
Conditions
Indoor: DB27°C/WB19°C
Indoor air flow: High
Pipe length: 5m
-10 -5 0 5 10-15 Outdoor temperature (°C)
40
50
70
90
100
80
60
110
120
Capacity ratio (%)
Conditions
Indoor: DB20°C
Indoor air flow: High
Pipe length: 5m
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2REFRIGERANT 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.
2-1. 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a
qualified air conditioner technician or electrician.
Improper repair’s may result in water leakage, electric shock and fire, etc.
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2-2. Refrigerant Piping Installation
2-2-1. 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.
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 discoloured 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 2-2-1. Never use copper pipes thinner than
0.8 mm even when it is available on the market.
Table 2-2-1 Thicknesses of annealed copper pipes
Joints
For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants.
•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 2-2-3 to 2-2-6 below.
•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 2-2-2.
Table 2-2-2 Minimum thicknesses of socket joints
2-2-2. Processing of Piping Materials
Whenperformingtherefrigerantpipinginstallation,careshouldbetakentoensurethat waterordustdoesnot 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.
Thickness (mm)
Nominal diameter Outer diameter (mm) R410A R22
1/4 6.35 0.80 0.80
3/8 9.52 0.80 0.80
1/2 12.70 0.80 0.80
5/8 15.88 1.00 1.00
Nominal diameter Reference outer diameter of
copper pipe jointed (mm) Minimum joint thickness (mm)
1/4 6.35 0.50
3/8 9.52 0.60
1/2 12.70 0.70
5/8 15.88 0.80
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Flare processing procedures and precautions
1) Cutting the Pipe
By means of a pipe cutter, slowly cut the pipe so that it is not deformed.
2) 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.
3) Insertion of Flare Nut
Table 2-2-3 Dimensions related to flare processing for R410A
Table 2-2-4 Dimensions related to flare processing for R22
Table 2-2-5 Flare and flare nut dimensions for R410A
4) 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. 2-2-1
Flare processing dimensions
Nominal
diameter
Outer
diameter
(mm)
Thickness
(mm)
A (mm)
Flare tool for R410A
clutch type Conventional flare tool
Clutch type Wing nut type
1/4 6.35 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0
3/8 9.52 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0
1/2 12.70 0.8 0 to 0.5 1.0 to 1.5 2.0 to 2.5
5/8 15.88 1.0 0 to 0.5 1.0 to 1.5 2.0 to 2.5
Nominal
diameter
Outer
diameter
(mm)
Thickness
(mm)
A (mm)
Flare tool for R22
clutch type Conventional flare tool
Clutch type Wing nut type
1/4 6.35 0.8 0 to 0.5 0.5 to 1.0 1.0 to 1.5
3/8 9.52 0.8 0 to 0.5 0.5 to 1.0 1.0 to 1.5
1/2 12.70 0.8 0 to 0.5 0.5 to 1.0 1.5 to 2.0
5/8 15.88 1.0 0 to 0.5 0.5 to 1.0 1.5 to 2.0
Nominal
diameter Outer diameter (mm) Thickness (mm) Dimension (mm) Flare nut width (mm)
ABCD
1/4 6.35 0.8 9.1 9.2 6.5 13 17
3/8 9.52 0.8 13.2 13.5 9.7 20 22
1/2 12.70 0.8 16.6 16.0 12.9 23 26
5/8 15.88 1.0 19.7 19.0 16.0 25 29
A
ØD
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Table 2-2-6 Flare and flare nut dimensions for R22
Fig. 2-2-2 Relations between flare nut and flare seal surface
Flare Connecting Procedures and Precautions
1) Make sure that the flare and union portions do not have any scar or dust, etc.
2) Correctly align the processed flare surface with the union axis.
3) 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 2-2-7 Tightening torque of flare for R410A [Reference values]
Nominal
diameter Outer diameter (mm) Thickness (mm) Dimension (mm) Flare nut width (mm)
ABCD
1/4 6.35 0.8 9.0 9.2 6.5 13 17
3/8 9.52 0.8 13.0 13.5 9.7 20 22
1/2 12.70 0.8 16.2 16.0 12.9 20 24
5/8 15.88 1.0 19.4 19.0 16.0 23 27
3/4 19.05 1.0 23.3 24.0 19.2 34 36
Nominal
diameter Outer diameter (mm) Tightening torque N•m (kgf•cm) Tightening torque of torque
wrenches available on the market
N•m (kgf•cm)
1/4 6.35 14 to 18 (140 to 180) 16 (160), 18 (180)
3/8 9.52 33 to 42 (330 to 420) 42 (420)
1/2 12.70 50 to 62 (500 to 620) 55 (550)
5/8 15.88 63 to 77 (630 to 770) 65 (650)
43° to 45°
45° to 46°
B A CD
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2-3. Tools
2-3-1. 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.
• Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
• Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
• 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 usingtheconventionalflaretools,adjustmentof projectionmargin
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 equipment which serve also for R22 are necessary as the
general tools.
Also prepare the following equipment for other installation method and run check.
No. Used tool Usage
R410A
air-water heat pump installation Conventional air-water heat pump installation
Existenceofnew
equipment for
R410A
Whetherconventional
equipment can be
used
Whethernew equipment
can be used with
conventional refrigerant
1 Flare tool Pipe flaring Yes *(Note 1) Yes
2Copper pipe gauge for
adjusting projection margin Flaring by conventional flare tool Yes *(Note 1) *(Note 1)
3Torque wrench
(For Ø12.7) Connection of flare nut Yes No No
4 Gauge manifold Evacuating, refrigerant
charge, run check, etc. Yes No No
5 Charge hose
6 Vacuum pump adapter Vacuum evacuating Yes No Yes
7Electronic balance for
refrigerant charging Refrigerant charge Yes Yes Yes
8 Refrigerant cylinder Refrigerant charge Yes No No
9 Leakage detector Gas leakage check Yes No Yes
10 Charging cylinder Refrigerant charge *(Note 2) No No
1. Vacuum pump
Use vacuum pump by attaching
vacuum pump adapter.
4. Reamer 9. Hole core drill (Ø65)
5. Pipe bender 10. Hexagon wrench
Opposite side 4mm)6. Level vial
2. Torque wrench (For Ø6.35, Ø9.52) 7. Screwdriver (+, –) 11. Tape measure
3. Pipe cutter 8. Spanner or Monkey wrench 12. Metal saw
1. Clamp meter 3. Insulation resistance tester
2. Thermometer 4. Electroscope
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2-4. Recharging Refrigerant
When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the
following steps.
CAUTION
• Never charge refrigerant exceeding the specified amount.
• If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.
• 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. 2-4-1 Configuration of refrigerant charging
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.
(Water heat
exchanger unit) (Outdoor unit)
Opened
Opened
Refrigerant cylinder
(with siphon)
Check valve
Open/close
valve for charging
Electronic balance for refrigerant charging
Opened
Closed
Service port
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NOTE
• Be sure to make setting so that liquid can be
charged.
• 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.
Fig. 2-4-2
Cylinder with siphon
Fig. 2-4-3
Cylinder without siphon
NOTE
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.
Gauge manifold OUTDOOR unit
Refrigerant
cylinder
Electronic
balance
Siphon
Gauge manifold OUTDOOR unit
Refrigerant
cylinder
Electronic
balance
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2-5. Brazing of Pipes
2-5-1. Materials for Brazing
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 solder ability.
Phosphor bronze brazing filler
Phosphor bronze brazing filler is generally used to join
copper or copper alloy.
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.
REQUIREMENT
• 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.
• Whenperformingbrazingagainattime of servicing,
use the same type of brazing filler.
2-5-2. Flux
Reason why flux is necessary
• Byremovingthe oxide filmand any foreign matteron
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.
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.
• Thecorrosiveaction tothetreatedmetalandbrazing
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.
Types of flux
•Non corrosive 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.
Piping materials for brazing and used brazing
filler/flux
NOTE
• Do not enter flux into the refrigeration cycle.
• When chlorine contained in the flux remains within
the pipe, the lubricating oil deteriorates.
Therefore, use a flux which does not contain
chlorine.
• When adding water to the flux, use water which
does not contain chlorine (e.g. distilled water or ion-
exchange water).
• Remove the flux after brazing.
2-5-3. 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.
CAUTION
Never use gas other than Nitrogen gas.
Piping material Used brazing filler Used flux
Copper - Copper Phosphor copper Do not use
Copper - Iron Silver Paste flux
Iron - Iron Silver Vapour flux
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