Connecting The Refrigerant Piping; To Route The Refrigerant Piping; To Connect The Refrigerant Piping To The Outdoor Unit; To Connect The Multi Connection Piping Kit - Daikin RXYLQ10T7Y1B Series Installation And Operation Manual

14 Piping installation
a
a
b 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.
If
≤2 m
a
>2 m
>2 m
a
≤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
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)
14.2

Connecting the refrigerant piping

14.2.1

To route the refrigerant piping

Installation of refrigerant piping is possible as front connection or
side connection (when taken out from the bottom) as shown in the
figure below.
Installation and operation manual
20
a
b
a
Then
b
≤2 m
>2 m
b
≤2 m
C
c
a b
a Left-side connection
b Front connection
c Right-side connection
For side connections, the knockout hole on the bottom plate should
be removed:
a
b
c
a Large knockout hole
b Drill
c Points for drilling
NOTICE
Precautions when making knockout holes:
▪ Avoid damaging the casing.
▪ After making the knockout holes, we recommend you
remove the burrs and paint the edges and areas
around the edges using repair paint to prevent rusting.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
14.2.2 To connect the refrigerant piping to the
outdoor unit
NOTICE
▪ Be sure to use the supplied accessory pipes when
carrying out piping 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.
Connect the stop valves to the field piping using the accessory pipes
supplied with the unit.
The connections to the branch kits are the responsibility of the
installer (field piping).
14.2.3

To connect the multi connection piping kit

NOTICE
Improper installation may lead to malfunction of the
outdoor unit.
▪ Install the joints horizontally, so that the caution label (a) attached
to the joint comes to the top.
▪ Do not tilt the joint more than 7.5° (see view A).
▪ Do not install the joint vertically (see view B).
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543426-1B – 2020.10