Multiple Outdoor Units: Possible Layouts - Daikin VRV IV Q+ Series Installer And User Reference Manual

18.1.7 Multiple outdoor units: Possible layouts

RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546229-1A – 2020.10
▪ 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
a
b
a
b
a
b
a To indoor unit
b Piping between outdoor units
NOT allowed (oil remains in piping)
Allowed
▪ 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.
a
b b
a
b b
a
a
b
a
a
a To indoor unit
b Oil collects to the outmost outdoor unit when the system stops
NOT allowed (oil remains in piping)
Allowed
▪ If the piping length between the outdoor units exceeds 2 m, create a rise of
200 mm or more in the gas line within a length of 2 m from the kit.
b
b
a
b b
a
18 Piping installation
|
Pattern 2
a
b
a
b
a a
b
Installer and user reference guide
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