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 DAIKIN WHICH ARE
SPECIFICALLY DESIGNED FOR USE WITH THE
EQUIPMENT AND HAVE THEM INSTALLED BY A
PROFESSIONAL.
DAIKIN EQUIPMENT IS DESIGNED FOR COMFORT
APPLICATIONS. FOR USE IN OTHER APPLICATIONS,
PLEASE CONTACT YOUR LOCAL DAIKIN DEALER.
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".
The English text is the original instruction. Other languages are
translations of the original instructions.
The refrigerant charge of the system must be less than
100 kg. This means that in case the calculated refrigerant
charge is equal to or more than 95 kg you must divide your
multiple outdoor system into smaller independent systems,
each containing less than 95 kg refrigerant charge.
For factory charge, refer to the unit name plate.
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 5 carefully and follow
these procedures correctly.
Installation manual
1
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 6 for more details.
RXYQ5~18P9W1B + RXYHQ12P9W1B + RXHQ8~18P9W1B
VRVIII System air conditioner
4PW67902-1 – 01.2011
1.INTRODUCTION
This installation manual concerns VRV inverters of the Daikin
RXYQ-P, RXHQ-P and RXYHQ series. These units are designed for
outdoor installation and used for heating and heat pump applications.
The RXHQ-P9 heating only series can be combined from 6 main
units and has nominal heating capacities ranging from 25 to 170 kW.
The RXY(H)Q-P series can be combined from 8 main units and has
nominal cooling capacities ranging from 14.0 to 147 kW and nominal
heating capacities ranging from 16.0 to 170 kW.
The RXYQ-P, RXHQ-P and RXYHQ units can be combined with
Daikin VRV indoor units for air conditioning purposes, and suitable for
R410A.
The present installation manual describes the procedures for
unpacking, installing and connecting the RXYQ-P, RXHQ-P and
RXYHQ 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.
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.
■Pay attention when connecting outdoor units in multi
combination. RXYQ-M units are NOT compatible with
RXY(H)Q-P units.
■The table above shows the possible total capacity
when configured in a standard combination.
Refer to the service manual for more details when
using a configuration other than a standard
combination.
■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.
■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 the following restrictions.
The capacities of outdoor units A, B, and C must
fulfill the following restriction conditions: A≥B≥C.
ABC
123
1To indoor units
2Outdoor unit multi connection piping kit (first
branch)
3Outdoor unit multi connection piping kit
(second branch)
■RX(Y/H)Q means RXYQ or RXHQ. For example,
RX(Y/H)Q20 = RX(Y/H)Q8 + RX(Y/H)Q12 means
RXYQ20 = RXYQ8 + RXYQ12 or RXHQ20 =
RXHQ8 + RXHQ12.
RXYQ5~18P9W1B + RXYHQ12P9W1B + RXHQ8~18P9W1B
VRVIII System air conditioner
4PW67902-1 – 01.2011
Installation manual
2
1.2.Standard supplied accessories
See location 1 in figure 24 for reference to where following
accessories are supplied with the unit.
■Outdoor unit multi connection piping kit (For R410A only: Always
use an appropriate kit dedicated for your system.)
Number of outdoor units connected
23
BHFQ22P1007BHFQ22P1517
■Pipe size reducer (For R410A only: Always use an appropriate
kit dedicated for your system.)
RXY(H)Q24~36 + RXYQ38~54
KHRQ22M75TKHRQ22M75H
To select an optimum refrigerant branching kit, refer to "6. Refrigerant
piping" on page 5.
1.4.Technical and Electrical specifications
Refer to the Engineering Data Book for the complete list of
specifications.
2.MAINCOMPONENTS
For main components and function of the main components, refer to
the Engineering Data Book.
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 10)
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.
Installation manual
3
Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
11 The equipment is not intended for use in a potentially explosive
atmosphere.
RXYQ5~18P9W1B + RXYHQ12P9W1B + RXHQ8~18P9W1B
VRVIII System air conditioner
4PW67902-1 – 01.2011
■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 31.
■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.
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.
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
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 a belt sling of ≤20 mm wide that adequately
bears the weight of the unit.
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.
RXYQ5~18P9W1B + RXYHQ12P9W1B + RXHQ8~18P9W1B
VRVIII System air conditioner
4PW67902-1 – 01.2011
Installation manual
4
5.UNPACKINGANDPLACINGTHEUNIT
6.REFRIGERANTPIPING
■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 7)
XNot allowed (except for RXYQ5)
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.
■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.
■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
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.
Toxic 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.
6.1.Installation tools
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).
Method for removing transportation stays
(only for RXYHQ12 units)
The 4 yellow transportation stays installed over the compressor legs
for protecting the unit during transport must be removed. Proceed as
shown in figure 30 and described below.
ACompressor
BFixing nut
CTransportation stay
1Slightly loosen the fixing nut (B).
2Remove the transportation stay (C).
3Tighten the fixing nut (B) again.
CAUTION
If the unit is operated with the transportation stays still in
place, abnormal vibration or noise may be generated.
Installation manual
5
NOTE
Make sure the pump oil does not flow oppositely into
the system while the pump is not working.
RXYQ5~18P9W1B + RXYHQ12P9W1B + RXHQ8~18P9W1B
VRVIII System air conditioner
4PW67902-1 – 01.2011
6.2.Selection of piping material
6.4.Connecting the refrigerant piping
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 10.
■ 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 ØTemper grade of piping material
≤15.9O
≥19.11/2H
O = Annealed1/2H = Half hard
■ 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.
Pipe Ø
6.40.8022.20.80
9.50.8028.60.99
12.70.8034.91.21
15.90.9941.31.43
19.10.80
Minimal thickness
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 10.
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
mm pipes (field supply).
5.Precautions when selecting branch piping
When the equivalent pipe length between outdoor and indoor
units is 90 m or more, the size of the main pipes (both gas side
and liquid side) must be increased.
Depending on the length of the piping, the capacity may drop,
but even in such a case it is possible to increase the size of the
main pipes. Refer to page 11. If the recommended pipe size is
not available, stick to the original pipe diameter (which may
result in a small capacity decrease).
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.
remove the burrs and paint the edges and areas
around the edges using the repair paint to prevent
rusting.
■When passing electrical wiring through the knock
holes, wrap the wiring with protective tape to
prevent damage.
6.3.Pipe connection
Be sure to perform a nitrogen blow when brazing and to read the
paragraph "Caution to be taken when brazing refrigerant piping" on
page 5 first.
NOTE
RXYQ5~18P9W1B + RXYHQ12P9W1B + RXHQ8~18P9W1B
VRVIII System air conditioner
4PW67902-1 – 01.2011
The pressure regulator for the nitrogen released when
doing the brazing should be set to 0.02 MPa or less.
(See figure 10)
1Refrigerant piping
2Location to be brazed
3Nitrogen
4Taping
5Manual valve
6Regulator
7Nitrogen
Do not use anti-oxidants when brazing the pipe joints.
Residue can clog pipes and break equipment.
Installation manual
6
2Removing the pinched piping (See figure 6)
Never remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Failure to observe the instructions in procedure below
properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
Use the following procedure to remove the pinched piping:
1
Remove the valve lid and make sure
that the stop valves are fully closed.
Precautions when connecting field piping.
■Perform brazing at the gas stop valve before
brazing at the liquid stop valve.
■Add brazing material as shown in the figure.
2
Connect a charge hose to service ports of all stop
valves.
3
Recover gas and oil from the pinched piping by
using a recovery unit.
Do not vent gases into the atmosphere.
4
When all gas and oil is recovered from the pinched
piping, disconnect the charge hose and close the
service ports.
5
In case the pinched piping lower part looks like
detail in
figure 6
A
, follow instructions as per
procedure steps 7+8.
In case the pinched piping lower part looks like
detail in
figure 6
B
, follow instructions as per
procedure steps 6+7+8.
6
Cut off the lower part of the smaller pinched
piping with an appropriate tool (e.g. a pipe
cutter, a pair of nippers, ...) so that a crosssection is open, allowing remaining oil to
drip out in case the recovery was not complete.
Wait until all oil is dripped out.
7
Cut the pinched piping off with a pipe cutter just
above the brazing point or just above the marking in
case there is no brazing point.
Never remove the pinched
piping by brazing.
8
Wait until all oil is dripped out in case the recovery
was not complete, and only then proceed with
connection of the field piping.
■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.
3One outdoor unit installed:
In case of RXYQ5 + RX(Y/H)Q8~18 + RXYHQ12
(See figure 8)
■Front connection:
Remove the stop valve cover to connect.
■Bottom connection:
Remove the knock holes on the bottom frame and route the
piping under the bottom frame.
AFront connection
Remove the stop valve cover to connect.
BBottom connection:
Remove the knock holes on the bottom frame and route the
piping under the bottom frame
1Gas pipe stop valve
2Liquid pipe stop valve
3Service port for adding refrigerant
4Gas side accessory pipe (1)
5Gas side accessory pipe (2)
6Liquid side accessory pipe (1)
7Liquid side accessory pipe (2)
8Brazing
9Gas side piping (field supply)
10Liquid side piping (field supply)
11Punch the knockout holes (use a hammer)
See figure 6.
1Service port
2Stop valve
3Point of pipe cutting just above brazing point or above marking
A
Pinched piping
B
Pinched piping
Installation manual
7
RXYQ5~18P9W1B + RXYHQ12P9W1B + RXHQ8~18P9W1B
VRVIII System air conditioner
4PW67902-1 – 01.2011
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