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2
Accessory parts
INFORMATION
• The main pipe on the gas side of this outdoor unit has a diameter of Ø28.6 mm, but a Ø19.1 mm flare connection
is used where the valve is connected. Be sure to use the Ø19.1 mm pipe and joint provided as accessories for
the pipe connection.
• Before installing the unit, check that the unit has the correct model name to prevent the wrong unit from being
installed in the wrong place.
• Before proceeding to weld the refrigerant pipe, be sure to pass nitrogen through the pipe.
• Before installing the indoor units, read the instructions in the installation manual provided with the indoor units.
• Before installing a branch pipe, read the instructions in the installation manual provided with the branch pipe kit.
• In the case of a simultaneous double twin system, use indoor unit with the same capacity for all four indoor units.
• P.C. board settings are required for some of the indoor units if they are to be used in a twin, triple or double twin
system. Refer to the instructions in the installation manual of the branch pipe kit, and ensure that the settings are
selected correctly.
• Combination with the indoor units
Combination with the indoor units is possible only when units with the same type are combined. Combinations
of units with different types cannot be used.
• The concealed duct high static pressure type is used for a single connection (when connecting a single indoor
unit to the outdoor unit).
Part name
Q’ty
Shape
Usage
Installation Manual
1
This manual
Hand this directly to the customer.
(For other languages that do not appear in this Installation
Manual, please refer to the enclosed CD-R.)
CD-ROM
1
—
Installation Manual
Joint (Ø19.1 – Ø25.4 mm)
1
For connecting the pipe
Joint (Ø25.4 – Ø28.6 mm)
1
For connecting the pipe
Drain nipple
1
Waterproof rubber cap
5
Type A (4 pcs.)
Type B (1 pc.)
Protective bush
1
For protecting wires (pipe cover)
Guard material for passage part
1
For protecting passage part (pipe cover)
Branch pipe kit
Combination indoor unit
RAV-GM224
RBC-DTWP101E
RM56 × 4 units
RAV-GM280
RBC-DTWP101E
RM80 × 4 units
3
Installation of R32 refrigerant air conditioner
CAUTION
R32 refrigerant air conditioner installation
•
This air conditioner adopts the HFC refrigerant (R32) which does not destroy ozone layer.
Therefore, during installation work, make sure that water, dust, former refrigerant, or refrigerant oil does not enter
the R32 refrigerant air conditioner cycle. To prevent mixing of refrigerant or refrigerant oil, the sizes of connecting
sections of charge port on the main unit and installation tools are different from those of the conventional
refrigerant units.
Accordingly, special tools are required for the R32 or R410A refrigerant units. For connecting pipes, use new and
clean piping materials with high pressure fittings made for the R32 or R410A only, so that water and/or dust does
not enter.
•
When using existing piping, refer to “15. Appendix - [1] Existing piping”.
Required tools / equipment and precautions for use
Prepare the tools and equipment listed in the following table before starting the installation work.
Newly prepared tools and equipment must be used exclusively.
Legend
: Conventional tools (R32 or R410A)
: Prepared newly (Use for R32 only)
Tools / equipment
Use
How to use tools / equipment
Gauge manifold
Vacuuming / charging
refrigerant and operation check
Conventional tools (R410A)
Charging hose
Conventional tools (R410A)
Charging cylinder
Cannot be used
Unusable (Use the electronic refrigerant charging
scale)
Gas leak detector
Charging refrigerant
Conventional tools (R32 or R410A)
Vacuum pump
Vacuum drying
Conventional tools (R32 or R410A)
Usable if the backflow prevention adapter is installed.
Vacuum pump with backflow
prevention function
Vacuum drying
Conventional tools (R32 or R410A)
Flare tool
Flare machining of pipes
Conventional tools (R410A)
Bender
Bending pipes
Conventional tools (R410A)
Refrigerant recovery
equipment
Refrigerant recovery
Conventional tools (R32 or R410A)
Torque wrench
Tightening flare nuts
Conventional tools (R410A)
Pipe cutter
Cutting pipes
Conventional tools (R410A)
Refrigerant cylinder
Charging refrigerant
Prepared newly (Use for R32 only)
Welding machine and
nitrogen cylinder
Welding pipes
Conventional tools (R410A)
Electronic refrigerant
charging scale
Charging refrigerant
Conventional tools (R32 or R410A)
111-EN
112-EN