Mounting The Outdoor Unit; To Provide The Installation Structure; Connecting The Refrigerant Piping; Precautions When Connecting Refrigerant Piping - Daikin RYYQ8T7Y1B Installer And User Reference Manual

6 Installation
NOTICE
When closing the electrical component box cover, make
sure that the sealing material on the lower back side of the
cover is not caught and bend towards the inside.
a
b
c
d
e
a Electrical component box cover
b Front side
c Power supply terminal block
d Sealing material
e Moisture and dirt could enter
X Not allowed
O Allowed
6.3

Mounting the outdoor unit

6.3.1

To provide the installation structure

Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
NOTICE
When the installation height of the unit needs to be
increased, do not use stands to only support the corners.
*
X Not allowed
O Allowed (* = preferred installation)
▪ The height of the foundation must at least be 150 mm from the
floor. In heavy snowfall areas, this height should be increased,
depending on the installation place and condition.
▪ The preferred installation is on a solid longitudinal foundation
(steel beam frame or concrete). The foundation must be larger
than the grey marked area.
≥AB
AA
a
Minimum foundation
a Anchor point (4×)
HP
8~12
14~20
▪ Fasten the unit in place using four foundation bolts M12. It is best
to screw in the foundation bolts until their length remains 20 mm
above the foundation surface.
Installer and user reference guide
22
(mm)
AA AB
766 992
1076 1302
NOTICE
▪ Prepare a water drainage channel around the
foundation to drain waste water from around the unit.
During heating operation and when the outdoor
temperatures are negative, the drained water from the
outdoor unit will freeze up. If the water drainage is not
taken care of, the area around the unit might be very
slippery.
▪ When installed in a corrosive environment, use a nut
with plastic washer (a) to protect the nut tightening part
from rust.
a
6.4

Connecting the refrigerant piping

6.4.1 Precautions when connecting refrigerant
piping
NOTICE
Make sure refrigerant piping installation complies with
applicable legislation. In Europe, EN378 is the applicable
standard.
NOTICE
Make sure the field piping and connections are not
subjected to stress.
WARNING
During tests, NEVER pressurize the product with a
pressure higher than the maximum allowable pressure (as
indicated on the nameplate of the unit).
WARNING
Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
▪ Toxic gas may be produced if refrigerant gas comes
into contact with fire.
WARNING
Always recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
Only use phosphoric acid deoxidised seamless copper.
NOTICE
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
6.4.2

About connecting the refrigerant piping

Before connecting the refrigerant piping, make sure the outdoor and
indoor units are mounted.
Connecting the refrigerant piping involves:
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV system air conditioner
4P370475-1C – 2016.11