The refrigerant R410A requires strict cautions for keeping
the system clean, dry and tight.
■Clean and dry
Foreign materials (including mineral oils such as
SUNISO oil or moisture) should be prevented from
getting mixed into the system.
■Tight
R410A does not contain any chlorine, does not
destroy the ozone layer, and does not reduce the
earth's protection against harmful ultraviolet radiation.
R410A can contribute slightly to the greenhouse effect
if it is released. Therefore we should take special
attention to check the tightness of the installation.
Read "6. Refrigerant piping" on page 4 carefully and follow
these procedures correctly.
Since design pressure is 4.0 MPa or 40 bar (for R407C
units: 3.3 MPa or 33 bar), pipes of larger wall thickness
may be required. The wall thickness of piping must be
carefully selected, refer to paragraph "6.2. Selection of
piping material" on page 5 for more details.
1.INTRODUCTION
This installation manual concerns VRV inverters of the Daikin
RXYQ-P7 series. These units are designed for outdoor installation
and used for cooling and heat pump applications. The RXYQ-P7
series consists of 6 main units and has nominal cooling capacities
ranging from 14.0 to 49 kW and nominal heating capacities ranging
from 16.0 to 56.5 kW.
The RXYQ-P7 units can be combined with Daikin indoor units for air
conditioning purposes, and suitable for R410A.
The present installation manual describes the procedures for
unpacking, installing and connecting the RXYQ-P7 units. Installation
of the indoor units is not described in this manual. Always refer to the
installation manual supplied with these units for their installation.
READ THIS MANUAL ATTENTIVELY BEFORE STARTING
UP THE UNIT. DO NOT THROW IT AWAY. KEEP IT IN YOUR
FILES FOR FUTURE REFERENCE.
IMPROPER INSTALLATION OR ATTACHMENT OF
EQUIPMENT OR ACCESSORIES COULD RESULT IN
ELECTRIC SHOCK, SHORT-CIRCUIT, LEAKS, FIRE OR
OTHER DAMAGE TO THE EQUIPMENT. BE SURE ONLY
TO USE ACCESSORIES MADE BY
SPECIFICALLY DESIGNED FOR USE WITH THE
EQUIPMENT AND HAVE THEM INSTALLED BY A
PROFESSIONAL.
DAIKIN
APPLICATIONS. FOR USE IN OTHER APPLICATIONS,
PLEASE CONTACT YOUR LOCAL
IF UNSURE OF INSTALLATION PROCEDURES OR USE,
ALWAYS CONTACT YOUR DEALER FOR ADVICE AND
INFORMATION.
THIS AIR CONDITIONER COMES UNDER THE TERM
"APPLIANCES NOT ACCESSIBLE TO THE GENERAL
PUBLIC".
Installation manual
1
DAIKIN
WHICH ARE
EQUIPMENT IS DESIGNED FOR COMFORT
DAIKIN
DEALER.
RXYQ8~18P7W1BR1
VRVIII System air conditioner
4PW44039-1C
1.1.Combination
1.4.Technical and Electrical specifications
The indoor units can be installed in the following range.
■Always use appropriate indoor units compatible with R410A.
To learn which models of indoor units are compatible with
R410A, refer to the product catalogs.
■The table above shows the possible total capacity
of indoor units
Total number
of indoor units
and number of possible indoor units.
■If the total capacity of the connected indoor units
exceeds the capacity of the outdoor unit, cooling
and heating performance may drop when running
the indoor units.
Refer to the section on performance characteristics in the Engineering Data Book for details.
1.2.Standard supplied accessories
See location 1 in figure 9 for reference to where following
accessories are supplied with the unit.
Refer to the Engineering Data Book for the complete list of
specifications.
1.5.System layout (See figure 27)
1BP unit (branch provider)
Choose the BP unit type (2 or 3 indoor units) in function of the
installation pattern.
Power supply line (3 wires) ➙ (1N~ 50 Hz, 230 V)
Tr ansmission and power supply line (4 wires)
Tr ansmission line (2 wires)
Brazing connection
Flare connection
Note down the installation location of each device in the
provided space on figure 27. Example: kitchen,
children's room, ...
Also fill in this information on the label attached to the
backside of the front panel.
This information will be useful when performing test
operation.
Installation manual
Operation manual
Fluorinated greenhouse gases label1
Multilingual fluorinated greenhouse
gases label
Additional refrigerant charge label1
1
1
See location 2 in figure 9 for reference to where following
accessories are supplied with the unit.
Unit typeItemQuantity
8~18 Hp1
8, 10 Hp1
12~18 Hp1
Unit typeItemQuantity
8~18 Hp1
8, 10, 14, 16 Hp1
12, 18 Hp1
Gas side accessory pipe
Liquid side accessory pipe
2.MAINCOMPONENTS
For main components and function of the main components, refer to
the Engineering Data Book.
1.3.Optional accessories
To install the above outdoor units, the following optional parts are
also required.
Refrigerant branching kit (for R410A only: Always use an appropriate
kit dedicated for your system.)
Refnet joint
KHRQ22M20T
KHRQ22M29T9
KHRQ22M64T
RXYQ8~18P7W1BR1
VRVIII System air conditioner
4PW44039-1C
Installation manual
2
3.SELECTIONOFLOCATION
This unit, both indoor and outdoor, is suitable for installation in a
commercial and light industrial environment. If installed as a household appliance it could cause electromagnetic interference, in which
case the user may be required to take adequate measures.
■Make sure to provide for adequate measures in order
to prevent that the outdoor unit be used as a shelter
by small animals.
■Small animals making contact with electrical parts can
cause malfunctions, smoke or fire. Please instruct the
customer to keep the area around the unit clean.
Obtain the customer's permission before installing.
The inverter units should be installed in a location that meets the
following requirements:
1The foundation is strong enough to support the weight of the unit
and the floor is flat to prevent vibration and noise generation.
If not, the unit may fall over and cause damage or
injury.
2The space around the unit is adequate for servicing and the
minimum space for air inlet and air outlet is available. (Refer to
figure 1 and choose one of the possibilities).
A B C DSides along the installation site with obstacles
Suction side
■ In case of an installation site where sides A+B+C+D have
obstacles, the wall heights of sides A+C have no impact on
service space dimensions. Refer to figure 1 for impact of wall
heights of sides B+D on service space dimensions.
■ In case of an installation site where only the sides A+B have
obstacles, the wall heights have no influence on any
indicated service space dimensions.
NOTE
3Make sure that there is no danger of fire due to leakage of
inflammable gas.
4Ensure that water can not cause any damage to the location in
case it drips out the unit (e.g. in case of a blocked drain pipe).
5The piping length between the outdoor unit and the indoor unit
may not exceed the allowable piping length. (Refer to
"6.6. Example of connection" on page 7)
6Select the location of the unit in such a way that neither the
discharged air nor the sound generated by the unit disturbs
anyone.
7Make sure that the air inlet and outlet of the unit are not
positioned towards the main wind direction. Frontal wind will
disturb the operation of the unit. If necessary, use a windscreen
to block the wind.
8Do not install or operate the unit on locations where air contains
high levels of salt, like e.g. in the vicinity of oceans. (Refer for
further information to the engineering databook).
9During installation, avoid the possibility that anybody can climb
on the unit or place objects on the unit.
Falls may result in injury.
10 When installing the unit in a small room, take measures in order
to keep the refrigerant concentration from exceeding allowable
safety limits in the event of a refrigerant leak.
The service space dimensions in figure 1 are
based on cooling operation at 35°C.
■The equipment described in this manual may cause
electronic noise generated from radio-frequency
energy. The equipment complies to specifications that
are designed to provide reasonable protection against
such interference. However, there is no guarantee that
interference will not occur in a particular installation.
It is therefore recommended to install the equipment
and electric wires keeping proper distances away from
stereo equipment, personal computers, etc...
(See figure 2).
1Personal computer or radio
2Fuse
3Earth leakage breaker
4Remote controller
5Cool/heat selector
6Indoor unit
In places with weak reception, keep distances of 3 m
or more to avoid electromagnetic disturbance of other
equipment and use conduit tubes for power and
transmission lines.
■In heavy snowfall areas, select an installation site
where snow will not affect the operation of the unit.
■The refrigerant R410A itself is nontoxic, nonflammable
and is safe. If the refrigerant should leak however, its
concentration may exceed the allowable limit
depending on room size. Due to this, it could be
necessary to take measures against leakage. Refer to
the chapter "14. Caution for refrigerant leaks" on
page 23.
■Do not install in the following locations.
• Locations where sulfurous acids and other
corrosive gases may be present in the atmosphere.
Copper piping and soldered joints may corrode,
causing refrigerant to leak.
• Locations where a mineral oil mist, spray or vapour
may be present in the atmosphere.
Plastic parts may deteriorate and fall off or causing
water leakage.
• Locations where equipment that produces electro-
magnetic waves is found.
The electromagnetic waves may cause the control
system to malfunction, preventing normal
operation.
• Locations where flammable gases may leak, where
thinner, gasoline, and other volatile substances are
handled, or where carbon dust and other
incendiary substances are found in the
atmosphere.
Leaked gas may accumulate around the unit,
causing an explosion.
■When installing, take strong winds, typhoons or
earthquakes into account.
Improper installation may result in fall over of the unit.
Installation manual
3
Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
RXYQ8~18P7W1BR1
VRVIII System air conditioner
4PW44039-1C
4.INSPECTINGANDHANDLINGTHEUNIT
At delivery, the package should be checked and any damage should
be reported immediately to the carrier claims agent.
When handling the unit, take into account the following:
1Fragile, handle the unit with care.
■Support the unit with a foundation of 67 mm wide or more. (The
support leg of the unit is 67 mm wide, see figure 3).
■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
20 mm
surface.
Keep the unit upright in order to avoid compressor
damage.
2Choose on beforehand the path along which the unit is to be
brought in.
3Bring the unit as close as possible to its final installation position
in its original package to prevent damage during transport. (See
figure 4)
1Packaging material
2Opening (large)
3Belt sling
4Opening (small) (40x45)
5Protector
4Lift the unit preferably with a crane and 2 belts of at least 8 m
long. (See figure 4)
Always use protectors to prevent belt damage and pay attention
to the position of the unit's centre of gravity.
NOTE
Use a belt sling of ≤20 mm wide that adequately
bears the weight of the unit.
5If a forklift is to be used, preferably transport the unit with pallet
first, then pass the forklift arms through the large rectangular
openings on the bottom of the unit. (See figure 5)
5.1 From the moment you use a forklift to move the unit to its final
position, lift the unit under the pallet.
5.2 Once at final position, unpack the unit and pass the forklift arms
through the large rectangular openings on the bottom of the unit.
NOTE
Use filler cloth on the forklift arms to prevent
damaging the unit. If the paint on the bottom
frame peels off, the anti corrosion effect may
decrease.
5.UNPACKINGANDPLACINGTHEUNIT
■Remove the four screws fixing the unit to the pallet.
■Make sure the unit is installed level on a sufficiently strong base
to prevent vibration and noise.
Do not use stands to only support the corners. (See
figure 8)
XNot allowed
OAllowed (units: mm)
■Make sure the base under the unit is larger than the 765 mm of
the unit depth. (See figure 3)
■The height of the foundation must at least be 150 mm from the
floor.
■The unit must be installed on a solid longitudinal foundation
(steelbeam frame or concrete) as indicated in figure 3.
ModelAB
RXYQ8~12930792
RXYQ14~1812401102
■Prepare a water drainage channel around the
foundation to drain waste water from around the unit.
■If the unit is to be installed on a roof, check the
strength of the roof and its drainage facilities first.
■If the unit is to be installed on a frame, install the
waterproofing board within a distance of 150 mm
under the unit in order to prevent infiltration of water
coming from under the unit.
■When installed in a corrosive
environment, use a nut with
plastic washer (1) to protect the
nut tightening part from rust.
1
6.REFRIGERANTPIPING
Do not insert fingers, rods or other objects into the air
inlet or outlet. When the fan is rotating at high speed, it
will cause injury.
Use R410A to add refrigerant.
All field piping must be installed by a licensed refrigeration
technician and must comply with relevant local and
national regulations.
Caution to be taken when brazing refrigerant piping
Do not use flux when brazing copper-to-copper refrigerant
piping. (Particularly for the HFC refrigerant piping)
Therefore, use the phosphor copper brazing filler metal
(BCuP) which does not require flux.
Flux has extremely harmful influence on refrigerant piping
systems. For instance, if the chlorine based flux is used, it
will cause pipe corrosion or, in particular, if the flux
contains fluorine, it will damage the refrigerant oil.
Be sure to perform a nitrogen blow when brazing. Brazing
without performing nitrogen replacement or releasing
nitrogen into the piping will create large quantities of
oxidized film on the inside of the pipes, adversely affecting
valves and compressors in the refrigerating system and
preventing normal operation.
After completing the installation work, check that the
refrigerant gas does not leak.
To xic gas may be produced if the refrigerant gas leaks into
the room and comes in contact with a source of fire.
Ventilate the area immediately in the event of a leak.
In the event of a leak, do not touch the leaked refrigerant
directly. Frostbite may be caused.
RXYQ8~18P7W1BR1
VRVIII System air conditioner
4PW44039-1C
Installation manual
4
6.1.Installation tools
6.3.Pipe connection
Make sure to use installation tools (gauge manifold charge hose,
etc.) that are exclusively used for R410A installations to withstand the
pressure and to prevent foreign materials (e.g. mineral oils such as
SUNISO and moisture) from mixing into the system.
(The screw specifications differ for R410A and R407C.)
Use a 2-stage vacuum pump with a non-return valve which can
evacuate to –100.7 kPa (5 Torr, –755 mm Hg).
NOTE
Make sure the pump oil does not flow oppositely into
the system while the pump is not working.
6.2.Selection of piping material
1.Foreign materials inside pipes (including oils for fabrication)
must be 30 mg/10 m or less.
2.Use the following material specification for refrigerant piping:
■ Size: determine the proper size referring to chapter
"6.6. Example of connection" on page 7.
■ Construction material: phosphoric acid deoxidized seamless
copper for refrigerant.
■ Temper grade: use piping with temper grade in function of the
pipe diameter as listed in the table below.
Pipe Ø Temper grade of piping material
≤15.9O
≥19.11/2H
O = Annealed1/2H = Half hard
Be sure to perform a nitrogen blow when brazing and to read the
paragraph "Caution to be taken when brazing refrigerant piping" on
page 4 first.
NOTE
The pressure regulator for the nitrogen released when
doing the brazing should be set to 0.02 MPa or less.
(See figure 11)
1Refrigerant piping
2Location to be brazed
3Nitrogen
4Taping
5Manual valve
6Regulator
Do not use anti-oxidants when brazing the pipe joints.
Residue can clog pipes and break equipment.
6.4.Connecting the refrigerant piping
1Front connection or side connection
Installation of refrigerant piping is possible as front connection or
side connection (when taken out from the bottom) as shown in
the figure.
■ The pipe thickness of the refrigerant piping should comply
with relevant local and national regulations. The minimal pipe
thickness for R410A piping must be in accordance with the
table below.
Minimal thickness
Pipe Ø
6.40.8019.10.80
9.50.8022.20.80
12.70.8028.60.99
15.90.99
t (mm)
Pipe Ø
Minimal thickness
t (mm)
3.Make sure to use the particular branches of piping that have
been selected referring to chapter "6.6. Example of connection"
on page 7.
4.In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the
following into account:
■ select the pipe size nearest to the required size.
■ use the suitable adapters for the change-over from inch to