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English
8.2.3. Connecting refrigerant piping to the outdoor unit
•
All pipings for gas and liquid over from the field connection piping kit
are field supplied.
Front connection
Remove the slit hole of the piping intake and connect piping to the
piping intake.
1
2
3
4
Open the slit
hole here
1 Liquid pipe stop valve
2 Gas pipe stop valve
3 Filed connection piping kit (accessory)
4 Slit hole
Side (bottom) connection
Remove the through hole cover on the bottom frame and lead out
the piping from the bottom frame.
1
2
4
3
6
5
1 Liquid pipe stop valve
2 Gas pipe stop valve
3 Filed connection piping kit (accessory) *
4 Through hole
5
Liquid side piping (field supply)
6
Gas side piping (field supply)
* There are models without this accessory.
• RXYQ168-216 without gas pipe
• RXYQ72,120,144,192-240 without liquid pipe
INFORMATION
All local inter unit piping are field supplied except the accessory pipes.
NOTE
Precautions when connecting field piping. Add brazing material as
shown in the figure.
1
1
1
1
2
2
≤
φ
1 in. (25.4 mm)
>
φ
1 in. (25.4 mm)
NOTE
• Be sure to use the supplied accessory pipes when carrying out pip-
ing work in the field.
•
Be sure that the field installed piping does not touch other pipes,
the bottom panel or side panel. Especially for the bottom and side
connection, be sure to protect the piping with suitable insulation, to
prevent it from coming into contact with the casing generated.
Connection from the stop valves to the field piping can be done by us
-
ing accessory pipes supplied as accessory.
NOTE
Make sure that the onsite piping does not come in contact with other
piping, the bottom frame or side panels of the unit.
The connections to the branch kits are the responsibility of the installer
(field piping).
8.2.4. Precautions when connecting piping between outdoor
units (multiple outdoor unit systems)
• To connect the piping between outdoor units, an optional multi
connection piping kit (BHFP22P100U/BHFP22P100UA) and
reducer piping kit (KHFP26P100UA) are always required. When
installing the piping, follow the instructions in the installation manual
that comes with the kit.
• Only proceed with piping work after considering the limitations on
installing listed here and in the chapter 8.2. Connecting the refriger-
ant piping on page 17 always referring to the installation manual
delivered with the kit.
8.2.5.
Possible installation patterns and configurations
• The piping between the outdoor units must be routed level or
slightly upward to avoid the risk of oil retention into the piping.
Pattern 1
Pattern 2
1
2
2
1
1
2
2
1
1 To indoor units
2 Piping between outdoor units
Prohibited patterns:
change to pattern 1 or 2
1
2
2
1
1
To indoor units
2
Piping between outdoor units
• To avoid the risk of oil retention to the outmost outdoor unit, always
connect the stop valve and the piping between outdoor units as
shown in the 4 correct possibilities of the figure below.
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