17
|
Piping installation
Installer and user reference guide
82
RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1C – 2021.11
a
b
a
b
a
b
a
a
a
≥200 mm
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.
If
Then
≤2 m
a
b
≤2 m
>2 m
a
≤2 m
≤2 m
≥200 mm
≥200 mm
b
>2 m
>2 m
a
To indoor unit
b
Piping between outdoor units
NOTICE
There are restrictions on the refrigerant pipe connection order between outdoor
units during installation in case of a multiple outdoor unit system. Install according to
following restrictions. The capacities of outdoor units A, B and C must fulfill the
following restriction conditions: A≥B≥C.
A
B
C
a b
c
a
To indoor units
b
Outdoor unit multi connecting piping kit (first branch)
c
Outdoor unit multi connecting piping kit (second branch)
17.2 Connecting the refrigerant piping
17.2.1 About connecting the refrigerant piping
Before connecting the refrigerant piping, make sure the outdoor and indoor units
are mounted.
Connecting the refrigerant piping involves:
▪
Routing and connecting the refrigerant piping to the outdoor unit
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