Daikin VRV IV RXYQ TYDN Series - 8.2.4. Precautions when connecting piping between outdoor units (multiple outdoor unit system); 8.2.5. Possible installation patterns and configurations

Installation Manual EDUS341411-N
26 Installation of Outdoor Units
3P362438-1B
16
3P362438-1B English
3
12
5
6
3
4
Open knockout
hole here
1 Liquid side stop valve
2 Gas side stop valve
3 Filed connection piping kit (accessory)
4 Knockout hole
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6 )CUUKFGRKRKPIƂGNFUWRRN[
INFORMATION
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NOTE
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1
1
1
1
22
ŰI1 in. (25.4 mm)
>
I
1 in. (25.4 mm)
NOTE
r Be sure to use the supplied accessory pipes when carrying out pip-
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r $GUWTGVJCVVJGƂGNFKPUVCNNGFRKRKPIFQGUPQVVQWEJQVJGTRKRGU
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connection, be sure to protect the piping with suitable insulation, to
prevent it from coming into contact with the casing generated.
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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
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8.2.4. Precautions when connecting piping between outdoor
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r To connect the piping between outdoor units, an optional multi con-
nection piping kit BHFP22P100U/151U is always required. When
installing the piping, follow the instructions in the installation manual
that comes with the kit.
r Only proceed with piping work after considering the limitations on
installing listed here and in the chapter 8.2. Connecting the refriger-
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delivered with the kit.
8.2.5. 2QUUKDNGKPUVCNNCVKQPRCVVGTPUCPFEQPƂIWTCVKQPU
r 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
2
1
1
2
1
2
2
1
1 To indoor unit
2 Piping between outdoor units
Prohibited patterns: change to pattern 1 or 2
1
2
2
1
1 To indoor unit
2 Piping between outdoor units
r To avoid the risk of oil retention to the outmost outdoor unit, always
connect the stop valve and the piping between outdoor units as
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Prohibited patterns: change to pattern 1 or 2
1
222
1
222
1 To indoor unit
2 Oil collects to the outmost outdoor units
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1
2
1
2
1
2
1 To indoor unit
2 Oil collects to the outmost outdoor units
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1
1
1
8 in. (200 mm)
1 To indoor unit
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create a rise of 8 in. (200 mm) or more in the gas line within a length
of 6.5 ft. (2 m) from the kit.