Daikin REYQ192XAYDU, REYQ96XAYCU, REYQ96XATJU, REYQ72XAYCU, REYQ72XATJU User Manual

INSTALLATION MANUAL

VRV System air conditioner

MODEL

REYQ72XATJU
REYQ96XATJU
REYQ120XATJU
REYQ144XATJU
REYQ168XATJU
REYQ192XATJU
REYQ216XATJU
REYQ240XATJU
REYQ264XATJU
REYQ288XATJU
REYQ312XATJU
REYQ336XATJU
REYQ360XATJU
REYQ384XATJU
REYQ408XATJU
REYQ432XATJU
REYQ456XATJU

Please visit http://www.daikinac.com/content/resources/manuals for the most current version of installation

instructions. In the event of conicting information, the online installation instruction is to be used.

Veuillez visiter http://www.daikinac.com/content/resources/manuals pour obtenir la version la plus récente des
instructions d’installation. En cas de conit d’informations, les instructions d’installation en ligne doivent être
utilisées.

REYQ72XAYDU
REYQ96XAYDU
REYQ120XAYDU
REYQ144XAYDU
REYQ168XAYDU
REYQ192XAYDU
REYQ216XAYDU
REYQ240XAYDU
REYQ264XAYDU
REYQ288XAYDU
REYQ312XAYDU
REYQ336XAYDU
REYQ360XAYDU
REYQ384XAYDU
REYQ408XAYDU
REYQ432XAYDU
REYQ456XAYDU

REYQ72XAYCU
REYQ96XAYCU
REYQ120XAYCU
REYQ144XAYCU
REYQ168XAYCU
REYQ192XAYCU
REYQ216XAYCU
REYQ240XAYCU
REYQ264XAYCU
REYQ288XAYCU
REYQ312XAYCU
REYQ336XAYCU
REYQ360XAYCU
REYQ384XAYCU
REYQ408XAYCU
REYQ432XAYCU

English

Français

Español

Visite http://www.daikinac.com/content/resources/manuals para obtener la versión más actualizada de las
instrucciones de instalación. En caso de información conictiva, se debe utilizar la instrucción de instalación en

línea.

3P477778-7G

Safety considerations

Read these Safety considerations for Installation carefully be­fore installing an air conditioner or heat pump. After complet­ing the installation, make sure that the unit operates properly
during the startup operation.
Instruct the customer on how to operate and maintain the
unit.
Inform customers that they should store this Installation
Manual with the Operation Manual for future reference.
Always use a licensed installer or contractor to install this
product.
Improper installation can result in water or refrigerant leak-

age, electrical shock, re, or explosion.

Meanings of DANGER, WARNING, CAUTION, and NOTE
Symbols:

DANGER ........ Indicates an imminently hazardous

situation which, if not avoided, will
result in death or serious injury.

WARNING ....... Indicates a potentially hazardous

situation which, if not avoided,
could result in death or serious
injury.

CAUTION ........ Indicates a potentially hazardous

situation which, if not avoided,
may result in minor or moderate
injury. It may also be used to alert
against unsafe practices.

NOTE ........... Indicates situations that may result

in equipment or property-damage
accidents only.

INFORMATION ... This symbol identies useful tips

or additional information.

DANGER

• Refrigerant gas is heavier than air and replaces oxygen. A
massive leak will result in oxygen depletion, especially in
basements, and an asphyxiation hazard will result in seri-

ous injury or death.

• Do not ground units to water pipes, gas pipes, telephone
wires, or lightning rods as incomplete grounding will result
a severe shock hazard resulting in severe injury or death.
Additionally, grounding to gas pipes will result a gas leak

and potential explosion resulting in severe injury or death.

• If refrigerant gas leaks during installation, ventilate the

area immediately. Refrigerant gas will result in producing

toxic gas if it comes into contact with re. Exposure to this

gas will result in severe injury or death.

• After completing the installation work, check that the re­frigerant gas does not leak throughout the system.

• Do not install unit in an area where ammable materials
are present due to risk of explosions that will result in seri-

ous injury or death.

• Safely dispose all packing and transportation materials
in accordance with federal/state/local laws or ordinances.
Packing materials such as nails and other metal or wood
parts, including plastic packing materials used for trans­portation will result in injuries or death by suffocation.

WARNING

• Only qualied personnel must carry out the installation

work. Installation must be done in accordance with this
installation manual. Improper installation could result in

water leakage, electric shock, or re.

• When installing the unit in a small room, take measures to
keep the refrigerant concentration from exceeding allow­able safety limits. Excessive refrigerant leaks, in the event

of an accident in a closed ambient space, could result in

oxygen deciency.

• Use only specied accessories and parts for installation
work. Failure to use specied parts could result in water
leakage, electric shocks, re, or the unit falling.

• Install the air conditioner or heat pump on a foundation

strong enough that it can withstand the weight of the unit.

A foundation of insufcient strength could result in the unit

falling and causing injuries.

• Take into account strong winds, typhoons, or earthquakes
when installing. Improper installation could result in the
unit falling and causing accidents.

• Make sure that a separate power supply circuit is pro­vided for this unit and that all electrical work is carried

out by qualied personnel according to local, state and
national regulations. An insufcient power supply capacity

or improper electrical construction could result in electric

shocks or re.

• Make sure that all wiring is secured, that specied wires
are used, and that no external forces act on the terminal

connections or wires. Improper connections or installation

could result in re.

• When wiring, position the wires so that the control box

cover can be securely fastened. Improper positioning of

the control box cover could result in electric shocks, re, or

the terminals overheating.

• Before touching electrical parts, turn off the unit.

• This equipment can be installed with a Ground-Fault Cir-

cuit Interrupter (GFCI). Although this is a recognized mea­sure for additional protection, with the grounding system in
North America, a dedicated GFCI is not necessary.

• Securely fasten the unit terminal cover (panel). If the
terminal cover/panel is not installed properly, dust or

water may enter the outdoor unit and could result in re or

electric shock.

• When installing or relocating the system, keep the refriger-
ant circuit free from substances other than the specied

refrigerant (R410A) such as air. Any presence of air or oth­er foreign substance in the refrigerant circuit could result
in abnormal pressure rise or rupture, resulting in injury.

• Do not change the setting of the protection devices. If the
pressure switch, thermal switch, or other protection device
is shorted and operated forcibly, or parts other than those

specied by Daikin are used, re or explosion could result.

3P477778-7G Englishi

CAUTION

• Do not touch the switch with wet ngers. Touching a switch
with wet ngers may result in electric shock.

• Do not allow children to play on or around the unit or it

may result in injury.

• The heat exchanger ns are sharp enough to cut, and

may result in injury if improperly used. To avoid injury wear

glove or cover the ns when working around them.

• Do not touch the refrigerant pipes during and immediately

after operation as the refrigerant pipes may be hot or
cold, depending on the condition of the refrigerant ow­ing through the refrigerant piping, compressor, and other
refrigerant cycle parts. It may result in your hands get­ting burns or frostbite if you touch the refrigerant pipes.
To avoid injury, give the pipes time to return to normal
temperature or, if you must touch them, be sure to wear
proper gloves.

• Install drain piping to proper drainage. Improper drain pip­ing may result in water leakage and property damage.

• Insulate piping to prevent condensation.

• Be careful when transporting the product.

• Do not turn off the power immediately after stopping

operation. Always wait for at least 5 minutes before turning
off the power. Otherwise, water leakage may result.

• Do not use a charging cylinder. Using a charging cylinder
may cause the refrigerant to deteriorate.

• Refrigerant R410A in the system must be kept clean, dry,
and tight.
(a) Clean and Dry - Foreign materials (including mineral

oils such as SUNISO oil or moisture) should be pre­vented from getting into the system.

(b) Tight - R410A does not contain any chlorine, does

not destroy the ozone layer, and does not reduce the
earth’s protection again harmful ultraviolet radiation.
R410A can contribute to the greenhouse effect if it is
released. Therefore take proper measures to check
for the tightness of the refrigerant piping installation.
Read the chapter Refrigerant Piping and follow the
procedures.

• Since R410A is a blend, the required additional refriger­ant must be charged in its liquid state. If the refrigerant is
charged in a state of gas, its composition can change and
the system will not work properly.

• The indoor unit is for R410A. See the catalog for indoor
models that can be connected. Normal operation is not
possible when connected to other units.

• Remote controller (wireless kit) transmitting distance can
be shorter than expected in rooms with electronic uores-

cent lamps (inverter or rapid start types). Install the indoor

unit far away from uorescent lamps as much as possible.

• Indoor units are for indoor installation only. Outdoor units

can be installed either outdoors or indoors. This unit is for
indoor use.

• Do not install the air conditioner or heat pump in the fol­lowing locations:
(a) Where a mineral oil mist or oil spray or vapor is pro-

duced, for example, in a kitchen.

Plastic parts may deteriorate and fall off and thus may
result in water leakage.

(b) Where corrosive gas, such as sulfurous acid gas, is

produced.
Corroding copper pipes or soldered parts may result
in refrigerant leakage.

(c) Near machinery emitting electromagnetic waves.

Electromagnetic waves may disturb the operation of

the control system and cause the unit to malfunction.

(d) Where ammable gas may leak, where there is car-

bon ber, or ignitable dust suspension in the air, or
where volatile ammables such as thinner or gasoline

are handled. Operating the unit in such conditions

may result in a re.

• Take adequate measures to prevent the outdoor unit from

being used as a shelter by small animals. Small animals
making contact with electrical parts may result in malfunc-

tions, smoke, or re. Instruct the customer to keep the

area around the unit clean.

NOTE

• Install the power supply and transmission wires for the in-
door and outdoor units at least 3.5ft.(1m) away from tele-

visions or radios to prevent image interference or noise.

Depending on the radio waves, a distance of 3.5ft.(1m)
may not be sufcient to eliminate the noise.

• Dismantling the unit, treatment of the refrigerant, oil and

additional parts must be done in accordance with the
relevant local, state, and national regulations.

• Do not use the following tools that are used with con­ventional refrigerants: gauge manifold, charge hose, gas

leak detector, reverse ow check valve, refrigerant charge

base, vacuum gauge, or refrigerant recovery equipment.

• If the conventional refrigerant and refrigerator oil are
mixed in R410A, the refrigerant result in deterioration.

• This air conditioner or heat pump is an appliance that

should not be accessible to the general public.

• As design pressure is 478 psi (3.3 MPa), the wall thick-
ness of eld-installed pipes should be selected in accor-

dance with the relevant local, state, and national regula­tions.

Codes and Regulations

This product is designed and manufactured to comply with
national codes. Installation in accordance with such codes
and/or prevailing local codes/regulations is the responsibility
of the installer. The manufacturer assumes no responsibility
for equipment installed in violation of any codes or regula­tions. Rated performance is achieved after 72 hours of opera­tion.
Make sure to use a DAIKIN specied checker while measur­ing sub cooling. Do not use the check valve or the other port
to measure it.

3P477778-7G English ii

REYQ72XATJU
REYQ96XATJU
REYQ120XATJU
REYQ144XATJU
REYQ168XATJU
REYQ192XATJU
REYQ216XATJU

REYQ240XATJU
REYQ264XATJU
REYQ288XATJU
REYQ312XATJU
REYQ336XATJU
REYQ360XATJU
REYQ384XATJU

REYQ408XATJU
REYQ432XATJU
REYQ456XATJU

REYQ72XAYDU
REYQ96XAYDU
REYQ120XAYDU
REYQ144XAYDU
REYQ168XAYDU
REYQ192XAYDU
REYQ216XAYDU

REYQ240XAYDU
REYQ264XAYDU
REYQ288XAYDU
REYQ312XAYDU
REYQ336XAYDU
REYQ360XAYDU
REYQ384XAYDU

REYQ408XAYDU
REYQ432XAYDU
REYQ456XAYDU

CONTENTS

REYQ72XAYCU
REYQ96XAYCU
REYQ120XAYCU
REYQ144XAYCU
REYQ168XAYCU
REYQ192XAYCU
REYQ216XAYCU

REYQ240XAYCU
REYQ264XAYCU
REYQ288XAYCU
REYQ312XAYCU
REYQ336XAYCU
REYQ360XAYCU
REYQ384XAYCU

REYQ408XAYCU
REYQ432XAYCU

VRV System air conditioner

Installation Manual

Safety considerations .....................................i

Codes and Regulations .................................. ii

1. Introduction ...........................................2

1.1. General information ................................. 2

1.2. Combinations and options ....................... 2

1.3. Indoor capacity range .............................. 3

1.4. Scope of the manual ............................... 3

2. Accessories ...........................................3

2.1. Accessories supplied with this unit .......... 3

3. Overview of unit ....................................4

3.1. Opening the unit ...................................... 4

3.2. Technical and Electrical specications .... 4

3.3. Main components .................................... 4

4. Selecting an installation location ........4

4.1. General precautions on installation ......... 4

4.2. Weather related precautions ................... 5

4.3. Selecting a location in cold climates ....... 5

5. Dimensions and service space ............ 6

5.1. Dimensions of outdoor unit ..................... 6

5.2. Service space.......................................... 6

6. Inspecting, handling and unpacking

the unit ...................................................7

6.1. Inspection ................................................ 7

6.2. Handling .................................................. 7

6.3. Unpacking ............................................... 7

6.4. Installing the unit ..................................... 8

6.5. Method for removing shipping plates ...... 8

6.6. Method for opening the sliding plate ....... 9

7. Refrigerant pipe size and allowable pipe

length .............................................................9

7.1. General information ................................. 9

7.2. Selection of piping material ..................... 9

7.3. Selection of piping size ........................... 9

7.4. Selection of refrigerant branch kits ........ 10

7.5. System piping (length) limitations ......... 11

8. Precautions on refrigerant piping ......14

8.1. Caution for brazing ................................ 14

8.2. Connecting the refrigerant piping .......... 14

8.3. Guidelines for handling stop valve......... 17

9. Field wiring ..........................................18

9.1. Power circuit, safety device and cable

requirements ......................................... 19

9.2. Wiring connection example for whole

system ................................................... 19

9.3. Leading wire procedure ......................... 19

9.4. Transmission wiring connection

procedure .............................................. 20

9.5. Power wiring connection procedure ...... 21

9.6. Procedure for Wiring Inside Units .......... 21

10. Air tight test and vacuum drying .......22

11. Pipe insulation ..................................... 23

12. Checking of device and installation

conditions ............................................24

13. Makingeldsettings ........................... 24

13.1. Accessing the push buttons on the

printed circuit board ............................... 24

13.2. Operating the push buttons and DIP

switches on the printed circuit board ..... 24

13.3. Connecting the PC congurator to the

outdoor unit ........................................... 26

14. Charging refrigerant ............................ 26

14.1. Precautions ........................................... 26

14.2. Calculating the additional refrigerant

charge ................................................... 26

14.3. Method for adding refrigerant ................ 28

15. Start-upandconguration .................30

15.1. Checks before initial start up ................. 30

15.2. Monitoring function and eld settings .... 31

15.3.

Energy saving and optimum operation

... 37

15.4. Test operation ........................................ 39

15.5. Malfunction code list .............................. 40

16. Operation of the unit ........................... 43

17. Maintenance and service .................... 43

17.1. Maintenance introduction ...................... 43

17.2. Service precautions............................... 43

17.3. Service mode operation ........................ 45

18. Caution for refrigerant leaks ..............45

18.1. Introduction ........................................... 45

19. Disposal requirements ........................45

The original instructions are written in English. All other

languages are translations of the original instructions.

1 3P477778-7G English

1. Introduction

1.1. General information

This installation manual concerns the VRV REYQ-X series, full

inverter driven, heat pump system.

1

2

1 Outdoor unit

2 Refrigerant piping

3 Branch Selector unit

4 VRV indoor unit

5 Cool/Heat selector (single Branch Selector unit only)

6 User interface (dedicated depending on indoor unit type)

User interface (wireless, dedicated depending on indoor unit type)

7

INFORMATION

Not all combinations of indoor units are allowed. For guidance, see

1.2. Combinations and options.

1.2 . Combinations and options

The VRV REYQ-X series heat recovery system can be combined with

several types of indoor units and is intended for R410A use only.

For an overview which units are available you can consult the product

catalogue for VRV REYQ-X series.

NOTE

To be sure your system setup (outdoor unit + Branch Selector unit(s)
+ indoor unit(s)) will work, you have to consult the latest technical

engineering data for VRV REYQ-X series.

An overview is given indicating the allowed combinations of indoor
units and outdoor units. Not all combinations are allowed. They are
subject to rules (combination between outdoor-indoor, single outdoor
unit use, multiple outdoor units use, combinations between indoor
units, etc.) mentioned in the technical engineering data.

The Branch Selector units that combined with REYQ-X units for
changing the refrigerant ow to indoor units are T type
(BSQ-TVJ, BS-Q54TVJ) only. Do not combine the T type and P type
(BSVQ-PVJU, BSV-Q36PVJU) in the system. Combination of T type

and P type cause malfunction.

1.2 .1. Indoor units combinations

In general VRV indoor units can be connected to REYQ-X units.

1.2.2. Outdoor units combinations

Combination for REYQ-X units are as indicated in tables right, where
REYQ 144-456 consists of multiple REYQ 96-120 single modules as

indicated.

3

5

4

6

7

3

5

4

6

72 96 120 144 168

REYQ72XATJU/XAYDU/XAYCU 1
REYQ96XATJU/XAYDU/XAYCU 1
REYQ120XATJU/XAYDU/XAYCU 1
REYQ144XATJU/XAYDU/XAYCU 1
REYQ168XATJU/XAYDU/XAYCU 1
REYQ192XATJU/XAYDU/XAYCU 2
REYQ216XATJU/XAYDU/XAYCU 1 1
REYQ240XATJU/XAYDU/XAYCU 2
REYQ264XATJU/XAYDU/XAYCU 1 1
REYQ288XATJU/XAYDU/XAYCU 2
REYQ312XATJU/XAYDU/XAYCU 1 1
REYQ336XATJU/XAYDU/XAYCU 2
REYQ360XATJU/XAYDU/XAYCU 3
REYQ384XATJU/XAYDU/XAYCU 2 1
REYQ408XATJU/XAYDU/XAYCU 1 2
REYQ432XATJU/XAYDU/XAYCU 3
REYQ456XATJU/XAYDU 2 1

To install the outdoor unit, the following accessory parts are also
required.

1 Refrigerant branch kit.

Description

REFNET header

REFNET joint

For the selection of the optimal branch kit, refer to 7.4. Selection of

refrigerant branch kits on page10.

2 Outdoor unit multi connection piping kit.

Number of outdoor units connected

2 3

BHFP26P100U

BHFP26P100UA

3 In order to control the cooling or heating operation from a central

location, the following option can be connected:

- Cool/Heat selector: KRC19-26A

- With optional xing box for the switch: KJB111A

- Centralized control devices (e.g., intelligent Touch Manager)

4 To instruct specic operation with an external input coming from a

central control the external control adaptor (DTA104A61/62) can

be used. Instructions (group or individual) can be instructed for low
noise operation and power consumption limitation operation.

5 For REYQ-X units it is also possible to make several commissioning

eld settings through a personal computer interface. For this option

999482P3 is required which is a dedicated cable to communicate
with the outdoor unit. The software for the user interface program

can be obtained from your local Daikin sales ofce.

(for 3 pipes) (for 2 pipes)

KHRP25M33H9
KHRP25M33HA

KHRP25M72H9
KHRP25M72HA

KHRP25M73HU9
KHRP25M73HUA

KHRP25A22T9
KHRP25A22TA

KHRP25A33T9
KHRP25A33TA

KHRP25M72TU9
KHRP25M72TUA

KHRP25M73TU9
KHRP25M73TUA

Model name

KHRP26M22H9
KHRP26M22HA

KHRP26M33H9
KHRP26M33HA

KHRP26M72H9
KHRP26M72HA

KHRP26A22T9
KHRP26A22TA

KHRP26A33T9
KHRP26A33TA

KHRP26M72TU9
KHRP26M72TUA

–

BHFP26P151U

BHFP26P151UA

INFORMATION

Refer to the technical engineering data for the latest option names.

23P477778-7G English

1.3. Indoor capacity range

1.3.1. Connection Ratio

Connection Ratio = Total capacity index of the indoor units / Capac­ity index of the outdoor units

Min. connection ratio

Type

Single outdoor units

Triple outdoor units

*1. 70% : REYQ72X type

When using

Type

only FXDQ,

FXMQ-PB,

FXSQ07-54 TA

Single out-

door unit

Double

outdoor

units

Triple out-

door units

Notes: *1. If the operational capacity of indoor units is more than

200% *1

130%, low airow operation is enforced in all the indoor

units.

*2. When outdoor-air processing units (FXMQ-MF) and

standard indoor units are connected, the total connection

capacity of the outdoor-air processing units (FXMQ-MF)
must not exceed 30% of the capacity index of the outdoor
units. And the connection ratio must not exceed 100%.

1.3.2. Outdoor Unit Combinations

Total capacity of indoor units needs to be within the specied range.

REYQ-X type

<Outdoor unit>

REYQ72XATJU/XAYDU/XAYCU . . . . . . . . . . . . 51-93

REYQ96XATJU/XAYDU/XAYCU . . . . . . . . . . . . 48-124

REYQ120XATJU/XAYDU/XAYCU . . . . . . . . . . . . 60-156

REYQ144XATJU/XAYDU/XAYCU . . . . . . . . . . . . 72-187

REYQ168XATJU/XAYDU/XAYCU . . . . . . . . . . . . 82-218

REYQ192XATJU/XAYDU/XAYCU . . . . . . . . . . . . 96-249

REYQ216XATJU/XAYDU/XAYCU . . . . . . . . . . . . 108-280

REYQ240XATJU/XAYDU/XAYCU . . . . . . . . . . . . 120-312

REYQ264XATJU/XAYDU/XAYCU . . . . . . . . . . . . 132-343

REYQ288XATJU/XAYDU/XAYCU . . . . . . . . . . . . 144-374

REYQ312XATJU/XAYDU/XAYCU . . . . . . . . . . . . 156-405

REYQ336XATJU/XAYDU/XAYCU . . . . . . . . . . . . 168-436

REYQ360XATJU/XAYDU/XAYCU . . . . . . . . . . . . 180-468

REYQ384XATJU/XAYDU/XAYCU . . . . . . . . . . . . 192-499

REYQ408XATJU/XAYDU/XAYCU . . . . . . . . . . . . 204-530

REYQ432XATJU/XAYDU/XAYCU . . . . . . . . . . . . 216-561

REYQ456XATJU/XAYDU . . . . . . . . . . . . 228-592

Types of connected outdoor units

REYQ-X type

50% (*1)Double outdoor units

Max. connection ratio

Types of connected indoor units

When using

at least one

FXAQ,

FXZQ05 TA,

FXSQ05 TA,

FXFQ07/09

180% *1 200% *1

160% *1 160% *1

130% *1 130% *1

<Total capacity index of indoor units>

When using

other indoor

unit models

Types of connected air treatment

FXMQ-MF

When

FXMQ-MF

is only

connected

100% 100% *2

When

FXMQ-MF and

indoor units are

connected

1.4. Scope of the manual

This manual describes the procedures for handling, installing and

connecting the VRV REYQ-X series outdoor units. This manual has

been prepared to ensure adequate maintenance of the unit, and it will
provide help in case problems occur.

INFORMATION

The installation of the indoor unit(s) is described in the indoor unit
installation manual provided with the indoor unit(s).

2. Accessories

2.1. Accessories supplied with this unit

Conrm the following accessories are included. The storage location
of the accessories is shown in the gure below.

Accessories assy (piping)

Accessories assy (operation
and installation manual)

NOTE

Do not throw away any of the accessories until installation is complete.
They are needed for installation work.

Name Clamp (1) Clamp (2) Clamp (3) Vinyl tube Manuals, etc.

Quantity 7 pcs. 1 pc. 1 pc. 5 pcs. 1 pc. each

• Operation Manual
Installation Manual

•

•

Shape

(Small)

Name

Quantity 1 pc. 1 pc. 1 pc. 1 pc.

Shape

Name

Quantity 1 pc. 1 pc. 2 pcs.

Liquid side

accessory

High and low gas

side accessory

pipe (1)

pipe (1)

(Large)

Liquid side

accessory

pipe (2)

168X72-144X

72,120X 144,168X96X

High and low gas

side accessory

pipe (2)

REQUEST FOR THE

Gas side

accessory

pipe (1)

accessory joint

INDICATION label
(Installation records)

Gas side

accessory

pipe (2)

96,144,168X

120X72X

L type

NOTE

Higher capacity than the above table can be selected, this may affect

Shape

96-168X72X

72,96X 120-168X

heating and cooling capacity. For additional information see technical
engineering data.

3 3P477778-7G English

3. Overview of unit

3.1. Opening the unit

To gain access to the unit, front panels need to be opened as follows:

14x

Once the front panel open, the control box can be accessed by remov­ing the control box cover as follows.

6x

For service purposes, the push buttons on the main printed circuit
board need to be accessed. To access these push buttons, the control

box cover does not need to be opened. See 13. Making eld settings
on page24.

DANGER: ELECTRICAL SHOCK

See Safety considerations on pagei.

DANGER: DO NOT TOUCH PIPING AND INTERNAL PARTS

See Safety considerations on pagei.

3.2. TechnicalandElectricalspecications

Refer to the Engineering Data Book for the complete list of specica­tions.

3.3. Main components

For main components and function of the main components, refer to

the Engineering Data Book.

CAUTION

Appliance not accessible to the general public, install it in a secured
area, protected from easy access.
This unit, both indoor and outdoor, is suitable for installation in a com­mercial and light industrial environment.

4.1. General precautions on installation

Select an installation site that meets the following requirements:

•

The foundation must be strong enough to support the weight of the unit.

• Installation location is at to prevent vibrations and noise generation
and to have sufcient stability.

• The space around the unit is adequate for maintenance and servic-
ing (refer to 5.2. Service space on page6).

• The space around the unit allows for sufcient air circulation.

• There is no danger of re due to leakage of inammable gas.

• The equipment is not intended for use in a potentially explosive

atmosphere.

• Select the location of the unit in such a way that the sound generat­ed by the unit does not disturb anyone, and the location is selected
according the applicable legislation.

• All piping lengths and distances have been taken into consideration
(refer to 7.5. System piping (length) limitations on page11).

• Take care that in the event of a water leak, water cannot cause any

damage to the installation space and surroundings.

• 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, refer to 18. Caution for refrig-

erant leaks on page45.

CAUTION

Excessive refrigerant concentrations in a closed room can lead to
oxygen deciency.

NOTE

The equipment described in this manual may cause electronic noise
generated from radio-frequency energy. The equipment complies

to specications 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

4. Selecting an installation location

WARNING

Be sure to provide for adequate measures in order to prevent that the
unit is used as a shelter by small animals.
Small animals making contact with electrical parts can cause malfunc-

tions, smoke or re. Please instruct the customer to keep the area

around the unit clean and clear.
In a domestic environment this product may cause radio interference
in which case the user may be required to take adequate measures.

1

2

A

B

5

1 Indoor unit

2 Branch switch, overcurrent breaker

3 Remote controller

4 Cool/Heat selector

5 Personal computer or radio

A

≥60 in. (1500 mm)

B

≥40 in. (1000 mm)

3

B

4

B

A

A

A

2

43P477778-7G English

An inverter air conditioner may cause electronic noise generated from

AM broadcasting. Examine where to install the main air conditioner

and electric wires, keeping proper distances away from stereo equip­ment, personal computers, etc.
Particularly for locations with weak reception, ensure there is a dis­tance of at least 10 ft. (3 m) for indoor remote controllers, place power
wiring and transmission wiring in conduits, and ground the conduits.

• The refrigerant R410A itself is nontoxic, non-ammable 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 18. Caution

for refrigerant leaks on page45.

• 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 vapor may be pres­ent in the atmosphere. Plastic parts may deteriorate and fall off or
cause water leakage.

- Locations where equipment that produces electromagnetic
waves is found. The electromagnetic waves may cause the con­trol system to malfunction, preventing normal operation.

- Locations where ammable 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, caus-

ing an explosion.

• When installing, take strong winds, hurricanes or earthquakes into

account, improper installation may result in the unit turning over.

4.2. Weather related precautions

• Be sure that the air inlet of the unit is not positioned towards the
main wind direction. Frontal wind will disturb the operation of the
unit. If necessary, use a screen to block the wind.

• Ensure that water cannot cause any damage to the location by

adding water drains to the foundation and prevent water traps in the
construction.

• When installing in areas where air contains high levels of salt such
as near the ocean; Contact your Daikin sales representative for
additional precautions.

To prevent exposure to wind and snow, install a bafe plates on the air

side of the outdoor unit (see 5.2. Service space for space requirement):

1

1 Bafe plates

In heavy snowfall areas it is very important to select an installation
site where the snow will not affect the unit. Additionally, installation of
a snow guard is recommended. When installing the unit in a location
where there is heavy snowfall, remove the coil guards to prevent snow

from accumulating on the ns.
If lateral snowfall is possible, make sure that the heat exchanger coil

is not affected by the snow (if necessary construct a lateral canopy).
Install the outdoor unit so that the bottom frame is at least 19-11/16 in.
(500 mm) above predicted snowfall levels.

1

4.3. Selecting a location in cold climates

NOTE

• When operating the unit in a low outdoor ambient temperature, be
sure to follow the instructions described below.

• The following images are for reference only. For more details con­tact your local dealer.

1 Construct a large canopy.

2 Construct a pedestal.

2

NOTE

When operating the unit in a low outdoor ambient temperature with
high humidity conditions, make sure to take precautions to keep the
drain holes of the unit free.

5 3P477778-7G English

5. Dimensions and service space

1 2

5.1. Dimensions of outdoor unit

1

2

3

5.2. Service space

The space around the unit is adequate for servicing and the minimum

space for air inlet and air outlet is available (refer to the gure below

and choose one of the possibilities).

b

a

a

c

a

a

d

b

e

d

e

c

8

7

4

5

6

1

2

3

10

9

Foundation bolt holes

9/16 (15)×7/8 (22.5) oblong holes×4

Pitch of foundation bolt holes

Pitch of foundation bolt holes

28-7/16 to 29 (722 to 737)
4 2-5/8 (67)
5 2-5/8 (67)
6 30-3/16 (767)
7 11-1/8 (282)
8 4-13/16 (122)
9 5-3/16 (132)

10 3-7/8 (98)
11 4-3/16 (107)
12 10-11/16 (272)
13 19-3/4 (502)
14 48-7/8 (1242)
15 6-9/16 (167)
16 8-9/16 (217)
17 10-1/2 (267)

18 66-11/16 (1694)

11

12

13

14

REYQ72-168X type

42-3/8 (1076)

1615 17

18

Unit: in. (mm)

3

b

e

f

a

a

d

c

a

a

5

b

e

f

a

a

d

ABCD Sides along the installation site with obstacles

Suction side

A+B+C+D A+B

a≥3/8 (10)
b≥11-3/4 (300)

1

c≥3/8 (10)
d≥19-5/8 (500)

a≥3/8 (10)
b≥11-3/4 (300)

2

c≥3/8 (10)
d≥19-5/8 (500)
e≥3/4 (20)

a≥3/8 (10)
b≥11-3/4 (300)
c≥3/8 (10)

3

d≥19-5/8 (500)
e≥3/4 (20)
f≥23-5/8 (100)

a≥3/8 (10)
b≥11-3/4 (300)

4

c≥3/8 (10)
d≥19-5/8 (500)
e≥3/4 (20)

a≥3/8 (10)
b≥19-5/8 (500)
c≥3/8 (10)

5

d≥19-5/8 (500)
e≥3/4 (20)
f≥35-7/16 (900)

c

a≥2 (50)
b≥3-7/8 (100)
c≥2 (50)
d≥19-5/8 (500)

a≥2 (50)
b≥3-7/8 (100)
c≥2 (50)
d≥19-5/8 (500)
e≥3-7/8 (100)

a≥2 (50)
b≥3-7/8 (100)
c≥2 (50)
d≥19-5/8 (500)
e≥3-7/8 (100)
f≥19-5/8 (500)

a≥2 (50)
b≥3-7/8 (100)
c≥2 (50)
d≥19-5/8 (500)
e≥3-7/8 (100)

a≥2 (50)
b≥19-5/8 (500)
c≥2 (50)
d≥19-5/8 (500)
e≥3-7/8 (100)
f≥23-5/8 (600)

a≥7-7/8 (200)
b≥11-3/4 (300)

a≥7-7/8 (200)
b≥11-3/4 (300)

e≥15-3/4 (400)

4

b

e

d

b

Unit: in.(mm)

c

63P477778-7G English

h2

<Front side> <Suction side>

h2

a

b +

2

or more

Service

space

or more

h1

+

2

h1

b

a 59 in. (1500 mm)

b 19-5/8 in. (500 mm)

• 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 the foregoing gure 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 ob-
stacles, the wall heights have no inuence on any indicated service

space dimensions.

INFORMATION

• Please secure enough space in front of the outdoor unit for on-site
installation of the refrigerant piping.

• The service space dimensions in above gure are based on cooling

operation at 95°F (35°C) ambient temperature (standard condi­tions).

• If the design outdoor temperature exceeds 95°F (35°C) or the
heat load exceeds maximum capacity in all the outdoor unit, take
an even large space on the intake shown in gure in 5.2. Service

space.

• If installing snow guard (eld supply), please incorporate the dimen­sions of the snow guard into the unit’s outer dimensions in order to
calculate the necessary amount of space.

• In places with low winter temperatures that may freeze the waste
water created by defrosting during heating operation, please leave
enough space between the bottom frame of the outdoor unit and its
base. (19-11/16 in. (500 mm) to 40 in. (1000 mm) of space is recom­mended.)

INFORMATION

Further specications can be found in the Engineering Data Book.

6. Inspecting, handling and unpacking the unit

6.1. Inspection

At delivery, the unit must be checked and any damage must be re­ported immediately to the carrier’s claims agent.

6.2. Handling

1 When handling the unit, take into account the following:

Fragile, handle the unit with care.

3 Bring the unit as close as possible to its nal installation position in

its original package to prevent damage during transport.

2

4

4
2
1

4

3

3

1 Packaging material

2 Belt sling

3 Opening

4 Protector

4 Lift the unit preferably with a crane and 2 belts of at least 27 ft.

(8 m) long as shown in the gure above.

Always use protectors to prevent belt damage and pay attention to
the position of the unit’s center of gravity.

NOTE

Use a belt sling of ≤3/4 in. (20 mm) wide that adequately bears the
weight of the unit.

A forklift can only be used for transport as long as the unit remains on
its pallet as shown above.

6.3. Unpacking

CAUTION

To avoid injury, do not touch the air inlet or aluminum ns of the unit.

WARNING

Tear apart and throw away plastic packaging bags so that children will
not play with them. Children playing with plastic bags face danger of
death by suffocation.

1 Remove the unit from its packing material.

Take care not to damage the unit when unpacking.

2 Remove the 4 bolts xing the unit to its pallet.

3 Make sure that all accessories as mentioned in 2.1. Accessories

supplied with this unit on page3 are available in the unit.

Keep the unit upright in order to avoid compressor damage.

2 Choose beforehand the path along which the unit is to be brought

in.

7 3P477778-7G English

6.4. Installing the unit

Make sure the unit is installed level on a sufciently strong base to

prevent vibration and noise.

NOTE

When the installation height of the unit needs to be increased, do not
use stands to only support the corners.

A

A

A

A

≥3-7/8 in. (100 mm)

X Not allowed

O Allowed

• The height of the foundation must be at least 5-7/8 in. (150 mm )
from the oor.

In heavy snowfall areas, this height should be increased, depending
on the installation place and condition.

• The unit must be installed on a solid longitudinal foundation (steel
beam frame or concrete) and make sure the base under the unit is
larger than the gray marked area.

6

7

A

A

A

1

NOTE

• There are restrictions on the refrigerant pipe connecting order
between outdoor units in the case of the multi system.

See 1.2.2. Outdoor units combinations on page2 for detail.

• When installing on a roof, make sure the roof oor is strong enough

and be sure to waterproof all work.

• Make sure the area around the machine drains properly by setting
up drainage grooves around the foundation.

• Drain water is sometimes discharged from the outdoor unit when it
is running.

• For anti-corrosion type, use nuts with resin washers. If the paint on
nut connections comes off, the anti-corrosion effect may decrease.

Resin washer

6.5. Method for removing shipping plates

The shipping plates installed over the compressor legs for protecting
the unit during transport must be removed. Proceed as shown in the
gure and procedure below. REYQ72-120X does not have the ship­ping plates.

Shipping plates

3

4

Dimensionsforabovegure

1 Hole for foundation bolt

2 Inner dimension of

2

the base

Distance between

3

foundation bolt holes

f9/16 in. (15 mm) dia: 4 positions

24-7/8 in. (631 mm)

29 in. (729 mm)

4 Width of unit 30-3/16 in. (767 mm)

Outer dimension of the

5

base

Longitudinal foundation

6

dimension

Distance between

7

foundation bolt holes

≥30-3/16 in. (767 mm)

48-7/8 in. (1242 mm)

42-3/8 in. (1076 mm)

• Fasten the unit in place using 4 foundation bolts
7/16 in. (M12). It is best to screw in the founda­tion bolts until their length remains 13/16 in. (20
mm) above the foundation surface.

2

5

A

A=13/16 in. (20 mm)

Front

REYQ144,168X type

1 Remove bolts (2 pcs) for xing shipping plate.

2 Remove all shipping plates (3 pcs).

3 Be sure to tighten the removed bolts back again.

Bolt

Shipping plate 2

Shipping plate 3Shipping plate 1

NOTE

If the unit is operated with the shipping plates still attached, abnormal
vibration or noise may be generated.

83P477778-7G English

6.6. Method for opening the sliding plate

The sliding plate should be moved to the open position in the following

regions to minimize temperature rise in the main control box: CA,
NV, AZ, NM, OK, TX, AR, LA, MS, AL, TN, GA, NC, SC, FL and Latin

America.

1 Remove the left screw (1 pc.) and loosen the right screw (1 pc.).

SLIDING PLATE

2 Move the sliding plate to the right and set the arrow to “OPEN”.

3 Reinstall the left screw and tighten both the left and right screws.

SCREW

7.2 . Selection of piping material

NOTE

Piping and other pressure containing parts shall comply with the appli­cable legislation and shall be suitable for refrigerant. Use phosphoric

acid deoxidized seamless copper for refrigerant.

NOTE

• All eld piping must be installed by a licensed refrigeration techni­cian and must comply with relevant local and national regulations.

• After piping work is complete, do not under any circumstances open
the stop valve until 9. Field wiring on page18 and 12. Checking of
device and installation conditions on page24 are complete.

• Do not use ux when brazing the refrigerant piping. Use the phos­phor copper brazing ller metal (B-Cu93P-710/795 : ISO 3677)
which does not require ux. Flux has extremely negative effect on
refrigerant piping systems. For instance, if the chlorine based ux is
used, it will cause pipe corrosion or, in particular, if the ux contains
uorine, it will damage the refrigerant oil.

• Use only pipes which are clean inside and outside and which do not
accumulate harmful sulfur, oxidants, dirt, cutting oils, moisture, or

other contamination. (Foreign materials inside pipes including oils
for fabrication must be 0.14 gr/10 ft. (30 mg/10 m) or less.)

• Use the following items for the refrigerant piping.

Material : Jointless phosphor-deoxidized copper pipe.
Size : See 7.3. Selection of piping size to determine the correct

size.
Thickness : Select a thickness for the refrigerant piping which
complies with national and local laws.

• For piping work, follow the maximum tolerated length, difference in

height, and length after a branch indicated in the 7.5. System piping
(length) limitations on page 11.

• Outdoor unit multi connection piping kit and refrigerant branch kit
(sold separately) are needed for connection of piping between
outdoor units (in case of multi system) and piping branches.

• Use only separately sold items selected specically according to

the outdoor unit multi connection piping kit, the refrigerant branch kit
selection in the 7.4. Selection of refrigerant branch kits on page 10.

7.3. Selection of piping size

Determine the proper size referring to following tables and reference

NOTE

Failure to follow the above instructions could lead to premature com­ponent failure.

7.

Refrigerant pipe size and allowable pipe length

7.1. General information

NOTE

The refrigerant R410A requires strict cautions for keeping the system

clean, dry and tight.

• Clean and dry: foreign materials (including mineral oils 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 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.

gure (only for indication).

a

A

C

1

b

D

DD

5 6

43

1 Multi Branch Selector unit

2 Single Branch Selector unit

3-8 VRV indoor units

a, b Refrigerant branch kits

x Outdoor unit multi connection piping kits

D

C

2

b

D

7 8

D

x

B B

9 3P477778-7G English

7.3.1. Pipingbetweenoutdoorunitsand(rst)refrigerant
branch kit: A, B

Choose from the following table in accordance with the outdoor unit
total capacity type, connected downstream.

Piping outer diameter size

Outdoor unit

capacity type

REYQ72X type

REYQ96X type

REYQ120X type

REYQ144X type

REYQ168X type

REYQ192, 216X type

REYQ240X type

REYQ264-336X type
REYQ360-456X type

7.3. 2 . Piping between refrigerant branch kits or refrigerant
branch kits and Branch Selector units: C

Choose from the following table in accordance with the indoor unit
total capacity, connected downstream. Do not let the connection pip-

ing exceed the refrigerant piping size chosen by the general system

model name.

Indoor unit

capacity index

<54

54≤×<72

72≤×<111

111≤×<162

162≤×<230

230≤×<300

>300

Example:

Downstream capacity for C = capacity index of (unit 3 + unit 4 + unit 5

+ unit 6)

7.3.3. Piping between refrigerant branch kits or Branch Selec­tor units and indoor units: D

Pipe size for direct connection to indoor units must be the same as the
connection size of the VRV indoor units.

Indoor unit

capacity index

07, 09, 12, 18 1/2 in. (12.7 mm) 1/4 in. (6.4 mm)

24, 30, 36, 42,
48, 54

72 3/4 in. (19.1 mm)

96 7/8 in. (22.2 mm)

Suction gas

pipe

3/4 in.

(19.1 mm)

7/8 in.

(22.2 mm)

1-1/8 in.

(28.6 mm)

1-3/8 in.

(34.9 mm)

1-5/8 in.

(41.3 mm)

Piping outer diameter size

Suction gas

pipe

5/8 in.

(15.9 mm)

3/4 in.

(19.1 mm)

7/8 in.

(22.2 mm)

1-1/8 in.

(28.6 mm)

1-3/8 in.

(34.9 mm)

1-5/8 in.

(41.3 mm)

Piping outer diameter size

Gas pipe Liquid pipe

5/8 in. (15.9 mm)

High/low

pressure gas

pipe

5/8 in.

(15.9 mm)

3/4 in.

(19.1 mm)

7/8 in.

(22.2 mm)

1-1/8 in.

(28.6 mm)

1-3/8 in.

(34.9 mm)

High/low

pressure gas

pipe

1/2 in.

(12.7 mm)

5/8 in.

(15.9 mm)

3/4 in.

(19.1 mm)

1-1/8 in.

(28.6 mm)

Liquid pipe

3/8 in.

(9.5 mm)

1/2 in.

(12.7 mm)

5/8 in.

(15.9 mm)

3/4 in.

(19.1 mm)

Liquid pipe

3/8 in.

(9.5 mm)

1/2 in.

(12.7 mm)

5/8 in.

(15.9 mm)

3/4 in.

(19.1 mm)

3/8 in. (9.5 mm)

7.4. Selection of refrigerant branch kits

For piping example, refer to 7.3. Selection of piping size on page9.

• When using REFNET joints at the rst branch from the outdoor

units, choose from the following table in accordance with the capac-

ity of the outdoor unit (example: REFNET joint a - see 7.3. Selection

of piping size).

Outdoor unit capacity type Kit name

REYQ72, 96X type

REYQ120-216X type

REYQ240-456X type

• For REFNET joints other than the rst branch (example REFNET

joint b - see 7.3. Selection of piping size), select the proper branch
kit model based on the total capacity of all indoor units connected
after the refrigerant branch.

Indoor unit

capacity index

<72

72≤×<111

111≤×<246

≥246

• Concerning REFNET headers, choose from the following table in

accordance with the total capacity of all the indoor units connected

after the REFNET header.

Indoor unit

capacity index

<72

72≤×<111

111≤×<230

≥230

(for3pipes) (for2pipes)

KHRP25A22T9
KHRP25A22TA

KHRP25A33T9
KHRP25A33TA

KHRP25M72TU9
KHRP25M72TUA

KHRP25M73TU9
KHRP25M73TUA

(for3pipes) (for2pipes)

KHRP25M33H9

KHRP25M33HA

KHRP25M72H9

KHRP25M72HA

KHRP25M73HU9

KHRP25M73HUA

KHRP25A33T9
KHRP25A33TA

KHRP25M72TU9

KHRP25M72TUA

KHRP25M73TU9
KHRP25M73TUA

Kit name

KHRP26A22T9
KHRP26A22TA

KHRP26A33T9
KHRP26A33TA

KHRP26M72T9

KHRP26M72TUA

KHRP26M73T9

KHRP26M73TUA

Kit name

KHRP26M22H9/
KHRP26M22HA:

maximum 4 inddor units

or
KHRP26M33H9/
KHRP26M33HA:

maximum 8 indoor units

KHRP26M33H9

KHRP26M33HA

KHRP26M72H9

KHRP26M72HA

KHRP26M73H9

KHRP26M73HA

INFORMATION

Maximum 8 branches can be connected to a header.

• How to choose an outdoor multi connection piping kit (needed if the

outdoor unit capacity type is 144 or more). Choose from the follow­ing table in accordance with the number of outdoor units.

Number of outdoor units Branch kit name

2

3

BHFP26P100U

BHFP26P100UA

BHFP26P151U

BHFP26P151UA

103P477778-7G English

7.5. Systempiping(length)limitations

Outdoor unit

<Exampleofrefrigerantpiping(8indoorunitsareconnected)>

First outdoor unit
multi connection
piping kit (*1)

a

A

e f

1 2

: Branch Selector unit (multi)

Outdoor unit

r

H3

t

B1

: Branch Selector unit (single)

B3B2

,

REFNET joint (A-E)

b c

d

B1 B2 B3

B

j

C

g

D

k

i

m

h

4 5 6 7

3

1 7

E

o

n

: Indoor units (cooling/heating

­selectable)

8

: Indoor unit (cooling only)

(*3)

H1

p

8

H2

(*1) “ ” represents an outdoor unit multi connection piping kit.

The outdoor unit multi connection piping kit must always be installed horizontally, paying attention to the installation restrictions indicated in

8.Precautionsonrefrigerantpiping on page 14.

<Exampleofconnection>

Outdoor unit

side

(1) (2)

Branch Selector

unit

Indoor unit

side

(1)PipingfromoutdoorunitstoBranchSelectorunits

Suction gas pipe

(3 lines): 3 pipes

High/low pressure gas pipe
Liquid pipe

(2)PipingfromBranchSelectorunitstotheindoorunits,andfromrefrigerantbranchkitstothecooling-onlyindoorunits(*2)

(2 lines): 2 pipes

(Suction) gas pipe
Liquid pipe

(*2) The 2-line gas pipe that is branched from the 3-line pipe and goes to the cooling-only indoor units should be connected to the suction gas pipe.

(*3) Cooling-only units should make up ≤50% of the total capacity of indoor units.

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Actual piping length

From outdoor unit (*4)
to indoor unit

Maximum
allowable
length

From rst outdoor unit

multi connection pip­ing kit to outdoor unit
(in a multi system)

From outdoor unit to
indoor unit

Allowable
height differ­ence

Allowable length after branch (*5) Actual piping length

From indoor unit to
indoor unit

From outdoor unit to
outdoor unit

Equivalent length

Total extension

Actual piping length

Equivalent length

Height difference

Height difference

Height difference Height difference between outdoor units (H3): ≤16 ft. (5 m)

Actual piping length from the outdoor unit (*4) to the indoor unit: ≤540 ft. (165 m)

4

(Example)

Equivalent piping length from the outdoor unit (*4) to the indoor unit: ≤623 ft.
(190m) (*6)
(Calculate the equivalent piping length for the REFNET joint as 1.6 ft. (0.5 m),
REFNET header as 3.3 ft. (1 m), BS4•6Q54TVJ as 19 ft. (6 m), BS8 to 12Q54TVJ
as 33ft. (10 m), BSQ36•60TVJ as 13 ft. (4 m), and BSQ96TVJ as 19 ft. (6 m).)

Total actual piping length from the outdoor unit (*4) to all indoor units: ≤ 3280 ft.

(1000 m)

Actual piping length from the rst outdoor unit multi connection piping kit to the
outdoor unit: ≤33 ft. (10 m)
Equivalent piping length from the rst outdoor unit multi connection piping kit to the
outdoor unit: ≤43 ft. (13 m)

Outdoor unit

Height difference between outdoor unit and indoor unit (H1): ≤164 ft. (50 m) (if
outdoor unit is lower than indoor unit, ≤130 ft. (40 m)) (*7)

Actual piping length X

X≤540 ft.

X≤390 ft.

Actual piping length from the rst REFNET joint or REFNET header to indoor
unit: ≤130 ft. (40 m) (*8)

(Example)

: a+d+g+i≤540 ft. (165 m),

8

: a+b+c+p≤540 ft. (165 m)

s

t

(165 m)

(120 m)

4

: d+g+i≤130 ft. (40 m),

8

: b+c+p≤130 ft. (40 m)

s≤33 ft. (10 m) (equivalent length≤43 ft. (13 m))
t≤33 ft. (10 m) (equivalent length≤43 ft. (13 m))

Height difference between indoor units (H2)

(15 m)

≤49 ft.

(30 m)

≤98 ft.

7

: a+b+c+ +m+o≤540 ft. (165 m),

7

: b+c+ +m+o≤130 ft. (40 m),

In the case of an outdoor units multi system, “outdoor unit” should be read as the “rst outdoor unit multi connection piping kit”, seen from the

(*4)

indoor units side.

(*5) In the case of a multi Branch Selector unit, it should be read as the “REFNET header”, and the allowable length of piping should be selected.

In the case where only 1 multi Branch Selector unit is included in the system, the actual piping length from each branch points of the multi

Branch Selector unit to each indoor units should be ≤130 ft. (40 m).

(*6) In the case where the equivalent piping length from outdoor units to indoor units ≥295 ft. (90 m), make sure to upsize the liquid pipe of the main

pipe (see the gure below), referring to the table below. (Do not upsize the high/low pressure gas pipe and the suction gas pipe.)

Outdoor unit capacity type Liquid pipe

REYQ72, 96X type

REYQ120, 144X type

REYQ168-240X type

REYQ264-456X type

(*7) It can be extended to ≤295 ft. (90 m) (if outdoor unit is lower than indoor unit, ≤195 ft. (60 m) by eld setting). See [2-49]=Height difference set-

ting on page 34.

f3/8 in. (9.5 mm) →

f1/2 in. (12.7 mm)

f1/2 in. (12.7 mm) →

f5/8 in. (15.9 mm)

f5/8 in. (15.9 mm) →

f3/4 in. (19.1 mm)

f3/4 in. (19.1 mm) →

f7/8 in. (22.2 mm)

Outdoor units

First refrigerant
branch kit

Branch

Selector

units

Main pipe
Upsize the liquid pipe

Indoor

units

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