DAIKIN REYQ72PAYD, REYQ96PAYD, REYQ120PAYD, REYQ72PATJ, REYQ96PATJ INSTALLATION MANUAL

INSTALLATION MANUAL

System air conditioner

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REYQ72PAYD
REYQ96PAYD
REYQ120PAYD

REYQ72PATJ
REYQ96PATJ
REYQ120PATJ

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If installed as a single unit

(Pattern 1)

1

(Pattern 2)

2

(Pattern 3)

figure 1 figure 3figure 2

≥3/8

≥7-7/8

>

≥11-3/4 ≥11-3/4

4

1

≥3/8

≥19-5/8

3

≥3-7/8

1

≥2

≥11-3/4

1

4

≥2

≥19-5/8

3

2

(Pattern 1)

≥3/8

(Pattern 2)

(Pattern 3)

≥7-7/8

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When installed in serial

≥3/8

1

≥3/4

≥2

≥3-7/8

≥3/4

≥3-7/8

1

≥11-3/4

1

≥15-3/4 ≥15-3/4

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2

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4

≥19-5/8

3

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≥19-5/8

1

2

2

4

3

≥60

5

3

≥40

≥60

≥60

4

≥60

(in.)

≥40

≥40

1

1

1

12

3

2

3-7/8

≥

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≥

3-7/8

3-7/8

≥

55

≥

figure 4 figure 6figure 5

1

2

30-1/8

51-1/4
45-3/4

1

1

2

6

3

30-1/8

4

29

3

24-7/8

4

5

3

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1

figure 7 figure 8 figure 9 figure 10

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1

5
4

6
3

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3-7/8

≥

3-7/8

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44

≥

3-7/8

2

figure 11

8

9

12

figure 12

1

3

5

5

7

6

8

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4

7

6

17

6

8

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13
8

11

14

15
16

18

8

15

10

A

1

2

B

5

figure 13 figure 14

34

1

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56

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figure 15

1

2

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7

figure 16 figure 17-2

figure 17-1

3

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12

A1P

TO IN/D UNIT

TO OUT/D UNIT

F1 F2 F1 F2

F1F2F1

TO IN/D UNIT

TO OUT/D UNIT

7

F1F2F1

4

8

F2

F2

F1F2F1

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TO IN/D UNIT

TO OUT/D UNIT

7

F1F2F1

F2

8

9

F1

F2

F1

F2

5

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F1 F2 F1 F2F1 F2

F1 F2 F1 F2

figure 18

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(A1P)

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4
1

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figure 20 figure 22

5

3

figure 21

4

2

4

2

6

figure 19

7

3

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65

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L1 L2 L3

9

10

12

4

11

11

1

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3

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9

10

8

13

14 14

figure 23

1

3

2

figure 24

2

B

2

C

Part A Part B Part C

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7
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: 19

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figure 26

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4
5
6
7

figure 28

11

12

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13

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REYQ72PAYD
REYQ96PAYD
REYQ120PAYD

R EY Q 72 PAT J
R EY Q 96 PAT J
REYQ120PATJ

VRVIII System air conditioner Installation manual

CONTENTS

1. FIRST OF ALL..........................................................................1

1-1. Safety considerations........................................................1

1-2. Special notice of product...................................................2

1-3. Disposal requirements.......................................................3

2. INTRODUCTION......................................................................3

2-1. Combination......................................................................3

2-2. Standard supplied accessories ......................................... 3

2-3. Option accessory...............................................................3

2-4. Technical and Electrical specifications..............................3

2-5. Main components..............................................................3

3. SELECTION OF LOCATION....................................................3

4. INSPECTING AND HANDLING THE UNIT..............................4

5. PLACING THE UNIT................................................................4

6. REFRIGERANT PIPING ..........................................................4

6-1. Selection of piping material and

Refrigerant branching kit ...................................................4

6-2. Protection against contamination when installing pipes....5

6-3. Pipe connection.................................................................5

6-4. Connecting the refrigerant piping ......................................5

6-5. Example of connection......................................................6

7. FIELD WIRING.........................................................................9

7-1. Power circuit, safety device and cable requirements ........9

7-2. Wiring Connection Example for Whole System.................9

7-3. Leading wire Procedure .................................................... 9

7-4. Transmission Wiring Connection Procedure................... 10

7-5. Power Wiring Connection Procedure ..............................10

7-6. Procedure for Wiring Inside Units....................................11

8. AIR TIGHT TEST AND VACUUM DRYING ...........................11

9. PIPE INSULATION.................................................................12

10. CHECKING OF DEVICE AND

INSTALLATION CONDITIONS ..............................................12

11. ADDITIONAL REFRIGERANT CHARGE AND

CHECK OPERATION.............................................................12

11-1.Before working ...............................................................12

11-2.Procedure of Adding Refrigerant charging and

check operation...............................................................13

12. ONSITE SETTINGS ...............................................................16

13. TEST RUN .............................................................................16

13-1.Before test run................................................................16

13-2.Test Run.........................................................................16

13-3.Checks After Test Run ...................................................17

14. CAUTION FOR REFRIGERANT LEAKS ...............................17

1. FIRST OF ALL

• This document is an installation manual for the Daikin REYQ-PA

Series VRV Inverter. Before installing the unit, read this manual thor­oughly, and following the instructions contained in it.
After installation, do a test run to make sure the unit runs properly,
and then explain how to operate and take care of the unit to the cus­tomer, using the operation manual.
Lastly, make sure the customer keeps this manual, along with the
operation manual, in a safe place.

1-1 Safety considerations

Read these “SAFETY CONSIDERATIONS for Installation” carefully before
installing air conditioning equipment. 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 leakage, electrical
shock, fire, or explosion.
Meanings of DANGER, WARNING, CAUTION, and NOTE Symbols:

DANGER .................... Indicates an imminently hazardous situa-

tion 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.

DANGER

• Refrigerant gas is heavier than air and replaces oxygen. A
massive leak can lead to oxygen depletion, especially in base­ments, and an asphyxiation hazard could occur leading to
serious injury or death.

• Do not ground units to water pipes, gas pipes, telephone
wires, or lightning rods as incomplete grounding can cause a
severe shock hazard resulting in severe injury or death. Addi­tionally, grounding to gas pipes could cause a gas leak and
potential explosion causing severe injury or death.

• If refrigerant gas leaks during installation, ventilate the area
immediately. Refrigerant gas may produce toxic gas if it
comes in contact with fire. Exposure to this gas could cause
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 flammable materials are
present due to risk of explosions that can cause serious 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 may
cause injuries or death by suffocation.

WARNING

• Only qualified personnel must carry out the installation work.
Installation must be done in accordance with this installation
manual. Improper installation may result in water leakage,
electric shock, or fire.

• 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, can lead to oxygen deficiency.

• Use only specified accessories and parts for installation work.
Failure to use specified parts may result in water leakage,
electric shocks, fire, or the unit falling.

• Install the air conditioner on a foundation strong enough that
it can withstand the weight of the unit. A foundation of insuf­ficient strength may result in the unit falling and causing inju­ries.

• Take into account strong winds, typhoons, or earthquakes
when installing. Improper installation may 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 qualified
personnel according to local state, and national regulations.
An insufficient power supply capacity or improper electrical
construction may lead to electric shocks or fire.

English 1

• Make sure that all wiring is secured, that specified wires are
used, and that no external forces act on the terminal connec­tions or wires. Improper connections or installation may re­sult in fire.

• When wiring, position the wires so that the electric parts box
lid can be securely fastened. Improper positioning of the elec­tric parts box lid may result in electric shocks, fire, or the ter­minals overheating.

• Before touching electrical parts, turn off the unit.

• Be sure to install a ground fault circuit interrupter if one is not
already available. This helps prevent electrical shocks or fire.

• Securely fasten the outside unit terminal cover (panel). If the
terminal cover/panel is not installed properly, dust or water
may enter the outside unit causing fire or electric shock.

• When installing or relocating the system, keep the refrigerant
circuit free from substances other than the specified refriger­ant (R-410A) such as air. Any presence of air or other foreign
substance in the refrigerant circuit can cause an 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 spec­ified by Daikin are used, fire or explosion may occur.

CAUTION

• Do not touch the switch with wet fingers. Touching a switch with
wet fingers can cause electric shock.

• Do not allow children to play on or around the unit to prevent
injury.

• 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 flowing through
the refrigerant piping, compressor, and other refrigerant cycle
parts. Your hands may suffer 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.

• Heat exchanger fins are sharp enough to cut.
To avoid injury wear glove or cover the fins when working
around them.

• 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 occur.

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

• Refrigerant R-410A 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 -- R-410A does not contain any chlorine, does not

destroy the ozone layer, and does not reduce the earth’s
protection again harmful ultraviolet radiation. R-410A 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 R-410A 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 R-410A. 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 fluorescent
lamps (inverter or rapid start types). Install the indoor unit far
away from fluorescent lamps as much as possible.

• Indoor units are for indoor installation only. Outdoor units can
be installed either outdoors or indoors.

• Do not install the air conditioner in the following locations:
(a) Where a mineral oil mist or oil spray or vapor is produced,

for example, in a kitchen.
Plastic parts may deteriorate and fall off or result in water
leakage.

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

duced.
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 flammable gas may leak, where there is carbon

fiber, or ignitable dust suspension in the air, or where vol­atile flammables such as thinner or gasoline are handled.
Operating the unit in such conditions can cause a fire.

• Take adequate measures to prevent the outside unit from be­ing used as a shelter by small animals. Small animals making
contact with electrical parts can cause malfunctions, smoke,
or fire. Instruct the customer to keep the area around the unit
clean.

NOTE

• Install the power supply and control wires for the indoor and out­door units at least 3.5 feet away from televisions or radios to pre­vent image interference or noise. Depending on the radio waves,
a distance of 3.5 feet may not be sufficient 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 flow check valve, refrigerant charge base, vacuum
gauge, or refrigerant recovery equipment.

• If the conventional refrigerant and refrigerator oil are mixed in
R-410A, the refrigerant may deteriorate.

• This air conditioner is an appliance that should not be acces­sible to the general public.

• The wall thickness of field-installed pipes should be selected
in accordance with the relevant local, state, and national reg­ulations.

1-2 Special notice of product

[CLASSIFICATION]

This air conditioner comes under the term “appliances not accessible to
the general public”.

[REFRIGERANT]
VRVIII System use R410A refrigerant.

• The refrigerant R410A requires strict cautions for keeping the sys-

tem clean, dry and tight.
Read the chapter “REFRIGERANT PIPING” carefully and follow
these procedures correctly.
A. Clean and dry

Foreign materials (including mineral oils such as SUNISO oil or
moisture) should be prevented from getting mixed into the system.

B. Tight

Take care to keep the system tight when installing.
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.

• Since R410A is a mixed refrigerant, the required additional refrigerant

must be charged in its liquid state. If the refrigerant is charged in a state
of gas, its composition changes and the system will not work properly.

2 English

[DESIGN PRESSURE]

Since design pressure is 478 psi, the wall thickness of pipes should be
more carefully selected in accordance with the relevant local and
national regulations.

1-3 Disposal requirements

Dismantling of the unit, treatment of the refrigerant, oil and eventual
other parts, should be done in accordance with the relevant local and
national regulations.

2. INTRODUCTION

• REYQ-PA series are designed for outdoor installation and used for

cooling and heating applications.

• The BS units that combined with REYQ-PA system for changing the

refrigerant flow to indoor units are BSVQ36 · 60 · 96P type only. To
combine with other type BS unit will cause malfunction.

• The indoor units that combined with REYQ-PA system for air condi-

tioning are Daikin VRV series indoor units that compatible with
R410A. To learn which indoor units are compatible with R410A, refer
to the product catalogs. To combine with other refrigerant indoor unit
will cause malfunction.

2-1 Combination

• The indoor units can be installed in the following range.

〈Outside unit〉〈Total capacity index of indoor units〉

REYQ72PAYD/PATJ ............................43 ~ 93.5

REYQ96PAYD/PATJ ............................57.5 ~ 124.5

REYQ120PAYD/PATJ ..........................72 ~ 156

• If the total capacity of the connected indoor units exceeds the capac-

ity of the outside unit, cooling and heating performance may drop
when running the indoor units. See the capacity table in the Engi­neering Data Book for details.

2-2 Standard supplied accessories

Confirm the following accessories are included. The storage location of
the accessories is shown in figure 1.

NOTE

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

Name

Quantity

Shape

Name

72PA type

96PA type

Quantity

120PA type

Shape

Name

72PA type

96PA type

Quantity

120PA type

Clamp(1)

9 pcs.

Clamp(2)

Vinyl tube

Conduit mounting plate

3 pcs. 1 pc. about each item

4 pcs.

2 pcs. 2 pcs.

Liquid side

accessory

pipe (1)

1 pc. 1 pc.

side accessory

1 pc.

HP / LP gas

pipe (1)

Liquid side

accessory

pipe (2)

1 pc.

1 pc.

Suction gas

side accessory

pipe (1)

1 pc.

1 pc.

φ7/8 φ7/8 φ1-1/8 φ3/4 φ7/8 φ1-1/8

HP / LP gas

side accessory

pipe (2)

1 pc. 1 pc.

1 pc.

1 pc.

Manuals, etc.

• Operation manual

• Installation manual

•

“REQUEST FOR THE
INDICATON” label
(Installation records)

Suction gas

side accessory

pipe (2)

1 pc.

1 pc.

1 pc.

L type

L type

accessory

accessory

joint (1)

joint (2)

1 pc. 1 pc.

1 pc.

accessory

joint (2)

(Refer to figure 1)

1. Clamps, Manuals, etc.

2. Accessory pipes

2-3 Option accessory

To install the outside units, the following optional parts are also required.
To select an optimum kit, refer to “6. REFRIGERANT PIPING”.

• Refrigerant branching kit

for 3 piping
REFNET header –
REFNET joint

KHRP25M22T KHRP25M33T

KHRP25M33H KHRP25M72H

KHRP25M72TU KHRP25M73TU

KHRP25M73HU

for 2 piping
REFNET header KHRP26M22H KHRP26M33H KHRP26M72H
REFNET joint KHRP26M22T KHRP26M33T

KHRP26M72TU

Make sure that any separately purchased accessories are designed for
use with R410A.

2-4 Technical and Electrical specifications

Refer to the Engineering Data Book for the complete list of specifications.

2-5 Main components

For main components and function of the main components, refer to the
Engineering Data Book.

3. SELECTION OF LOCATION

Select a location for installation that meets the following conditions and
get the customer’s permission.

1.

Select the location of the unit in such a way that neither the dis­charged air nor the sound generated by the unit disturb anyone.

2.

The foundation is strong enough to support the weight of the unit and
the floor is flat to prevent vibration and noise generation.

3.

The piping length between the outside unit and the indoor unit may
not exceed the allowable piping length.
(Refer to “6. REFRIGERANT PIPING”)

4.

Locations where the unit’s suction vent and outlet vent do not gener­ally face the wind.
Wind blowing directly into the suction or outlet vents will interfere with
the unit’s operation.
If necessary, install some kind of obstruction to block the wind.

5.

The space around the unit is adequate for servicing and the mini­mum space for air inlet and air outlet is available.
(See the “Installation Space Examples” for the minimum space
requirements.)

Installation Space Examples

• The installation space requirement shown in figure 2 is a reference

for cooling operation when the outdoor temperature is 95°F.
If the design outdoor temperature exceeds 95°F or the heat load
exceeds maximum capacity in all the outside unit, take an even large
space on the intake shown in figure 2.

• During installation, install the units using the most appropriate of the

patterns shown in figure 2 for the location in question, taking into
consideration human traffic and wind.

• If the number of units installed is more than that shown in the pattern

in figure 2, install the units so there are no short circuits.

• As regards space in front of the unit, consider the space needed for

the local refrigerant piping when installing the units.

• If the work conditions in figure 2 do not apply, contact your dealer or

Daikin directly.

(Refer to figure 2)

1. Front side

2. No limit to wall height

3. Service space of front side

4. Service space of suction side

For Patterns 1 and 2 in figure 2 :

• Wall height for front side – no higher than 59 in.

• Wall height on the suction side – no higher than 19-5/8 in.

• Wall height for sides – no limit.

Shape

φ5/8 φ3/4 φ5/8 φ3/4 φ1 φ3/4

English 3

• If the height is exceeded the above, calculate h1 and h2 shown in

the figure below, and add h2/2 to the service space of front side
and h1/2 to the service space of suction side.

h2

<Front side> <Suction side>

Service

or more

h2

2

19 - 5/8 +

59

DANGER

• Do not install unit in an area where flammable materials are
present due to risk of explosion resulting in serious injury or
death.

• Refrigerant gas in heavier air and replaces oxygen. A massive
leak could lead to oxygen depletion, especially in basements,
and an asphyxiation hazard could occur leading to serious inju­ry or death.
Refer to the chapter “CAUTION FOR REFRIGERANT LEAKS”.

NOTE

1.

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 for indoor remote controllers, place power wir­ing and transmission wiring in conduits, and ground the conduits.

(Refer to figure 3)

1. Indoor unit

2. Branch switch, earth leakage circuit breaker

3. Remote controller

4. COOL/HEAT selector

5. Personal computer or radio

2.

When installing in locations where there is heavy snowfall, imple­ment the following snow measures.

• Ensure the base is high enough that intakes are not clogged by

snow.

• Remove the rear intake grille to prevent snow from accumulating

on the fins.

space

or more

h1

+

2

h1

19-5/8

4. INSPECTING AND HANDLING THE UNIT

• 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 :

1.

Fragile, handle the unit with care.
Keep the unit upright in order to avoid compressor damage.

2.

Decide on the transportation route.

3.

If a forklift is to be used, pass the forklift arms through the large open­ings on the bottom of the unit. (Refer to figure 4)

4.

If hanging the unit, use a cloth sling to prevent damaging the unit.
Keeping the following points in mind, hang the unit following the pro­cedure shown in figure 5.

• Use a sling sufficiently strong to hold the mass of the unit.

• Use 2 belts of at least 27 ft long.

• Place extra cloth or boards in the locations where the casing

comes in contact with the sling to prevent damage.

• Hoist the unit making sure it is being lifted at its center of gravity.

5.

After installation, remove the transportation clasp (yellow) attached
to the large openings. (Refer to figure 4)

(Refer to figure 4)

1. Packaging material

2. Forklift

(Refer to figure 5)

1. Belt sling

2. Wear plate

5. PLACING THE UNIT

• Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise. (Refer to figure 6)

• The base should support the unit with the extent larger than hatched

area in figure 7.
If protective rubber is to be attached, attach it to the whole face of the
base.

• The height of the base should be at least 5-7/8 in. from the floor.

• Secure the unit to its base using foundation bolts. (Use four commer-

cially available M12-type foundation bolts, nuts, and washers.)

• The foundation bolts should be inserted 13/16 in..

(Refer to figure 6)

1. Independent base (four corner type)

2. Independent base (with center support type)

3. Beam base (Horizontal)

4. Beam base (Vertical)

5. Center of the product

(Refer to figure 7)

1. Foundation bolt point (φ9/16 in. dia, : 4positions)

2. (Depth of product)

3. (Inner dimension of the base)

4. (Outer dimension of the base)

NOTE

• There are restrictions on the refrigerant pipe connecting order

between outside unit in the case of the multi system.
See “2-1 Combination” for detail.

• When installing on a roof, make sure the roof floor is strong enough
and be sure to water-proof 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 outside 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 washers

6. REFRIGERANT PIPING

NOTE

• All field 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 shutoff valve until “7. FIELD WIRING” and “10. CHECKING OF
DEVICE AND INSTALLATION CONDITIONS” are complete.
Do not use flux when brazing the refrigerant piping. Use the phosphor

•

copper brazing filler metal (B-Cu93P-710/795 : ISO 3677) which does
not require flux.
(Flux has extremely negative effect 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.)

6-1 Selection of piping material and Refrigerant

branching kit

• 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 9 mg/10 ft or less.)

• Use the following items for the refrigerant piping.

Material : Jointless phosphor-deoxidized copper pipe
Size : See “6-5 Example of connection” to determine the cor-

rect 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 “6-5 Example of
connection”.

13/16 in.

4 English

• Outside unit multi connection piping kit and refrigerant branching kit

(sold separately) are needed for connection of piping between out­side units (in case of multi system) and piping branches.
Use only separately sold items selected specifically according to the
outside unit multi connection piping kit, the refrigerant branching kit
selection in the “6-5 Example of connection”.

6-2 Protection against contamination

when installing pipes

Protect the piping to prevent moisture, dirt, dust, etc. from enter­ing the piping.

Place Installation period Protection method

Outdoor

Indoor Regardless of the period

NOTE

Exercise special caution to prevent dirt or dust when passing piping
through holes in walls and when passing pipe edges to the exterior.

More than a month Pinch the pipe
Less than a month

Pinch or tape the pipe

6-3 Pipe connection

• Be sure to perform nitrogen permutation or nitrogen blow when

brazing. (Refer to figure 8)
Brazing without performing nitrogen permutation or nitrogen blow
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.

(Refer to figure 8)

1. Refrigerant pipe

2. Location to be brazed

3. Nitrogen

4. Taping

5. Handy valve

6. Regulator

• The pressure regulator for the nitrogen released when doing the

brazing should be set to about 2.9 psi (Enough to feel a slight
breeze on your cheek).

NOTE

Do not use anti-oxidants when brazing the pipe joints.
Residue can clog pipes and break equipment.

6-4 Connecting the refrigerant piping

1.

Direction to bring out the pipes
The local inter unit piping can be connected either forward or to the
sides (taken out through the bottom) as shown in the figure 9.
When passing out through the bottom, use the knock hole in the bot­tom frame.

(Refer to figure 9)

1. Left-side connection

2. Front connection

3. Right-side connection

Precautions when knocking out knock holes

• Open knock hole (large, small) in the base frame by drilling the 4
concave around it with a φ -1/4”-bit. (Refer to figure 10)

(Refer to figure 10)

1. Knock hole

(large : for liquid pipe, suction gas pipe and HP/LP gas pipe)

2. Knock hole (small : for equalizer pipe)

3. Drill

4. Concave section (4 points)

• Be sure to avoid damaging the casing.

• After knocking out the holes, we recommend you remove any burrs

and paint them using the repair paint to prevent rusting.

• When passing electrical wiring through the knock holes, protect the wir­ing with a conduit or bushings, making sure not to damage the wiring.

2.

Removing Pinch Piping

• When connecting refrigerant piping to an outside unit, remove the

pinch piping using the procedure in the figure 11.

(Refer to figure 11)

• About handling of shutoff valves, refer to [Shutoff valve operation
procedure] in “11-1 Before working”.

CAUTION

After removing the gass, remove the pinch piping.
Any gas remaining inside may blow off the pinch piping when you
dissolve the brazing, causing damage.

(Refer to figure 11)

1. Pich piping (3 pieces)

2. Do not remove the relay piping.

3. Pinch piping

4. Procedure 1 : Confirm the shutoff valve is closed.

5. Procedure 2 : Connect a charge hose to the service port of

shutoff valve and remove the gas in the pinch piping.

6. Procedure 3 : After removing the gas in the pinch piping, dis-

solve the brazing using a burner and remove the pinch piping.

3.

Connecting refrigerant piping to outside units

• Figure 12 shows the example of connecting refrigerant piping to out-

side units.

• The local inter unit piping next accesorry pipes are field supplyed.
(Refer to figure 12)

1. When connected to the front

2. When connected at lateral side (bottom)

3. Remove the shutoff valve cover to connect.

4. Remove the knock hole on the bottom frame and route the

piping under the bottom frame.

5. Liquid pipe shutoff valve

6. Suction gas pipe shutoff valve

7. HP/LP gas pipe shutoff valve

8. Brazing

9. Liquid side accessory pipe (1)

10. Suction gas side accessory pipe (1)

11. HP/LP gas side accessory pipe (1)

12. L type accessory joint (1)

13. L type accessory joint (2)

14. Liquid side accessory pipe (2)

15. Suction gas side accessory pipe (2)

16. HP/LP gas side accessory pipe (2)

17. In case of 72PA type use the Accessory joint for connecting

the Suction gas side accessory pipe (2) to Suction gas side
shutoff valve.

18. Accessory joint

NOTE

• Make sure the onsite piping does not come into contact with other

piping or the bottom frame or side panels of the unit.

4.

Branching the refrigerant piping
Heed the restrictions below when installing the refrigerant branching
kit and read the installation instruction manual with the kit.
(Improper installation could lead to malfunctioning or breakdown of
the outside unit.)

<REFNET joint>

Install the REFNET joint so it splits horizontally or vertically.

(Refer to figure 13)

1. Horizontal

2. A-arrow view

3. Horizontal surface

4. ±30° or less

5. Vert ic al

<REFNET header>

Install the REFNET header so it splits horizontally.

(Refer to figure 14)

1. Horizontal surface

2. B-arrow view

English 5

6-5 Example of connection

H1H1

REFNET header

a

p

REFNET header

REFNET joint (A~G)

Outside unit Outside unit

n

B5

m

b

A

a

H1

H1

e

d

REFNET joint (A~G)

c

o

8

H2

n

m

j

k

i

h

f

g

Indoor unit (Cool/Heat selection possible)

: BS Unit

:

e

d

1234567

B1 B2 B3 B4 B5 B6

c

b

H2

8

o

B

k

i

j

g

h

f

e

123456 7

B1 B2 B3 B4

c

d

: Indoor unit (Cooling only)

B1 ~ B6

1 ~ 6

7 , 8

Indoor unit (Cool/Heat selection possible)

: BS Unit

:

: Indoor unit (Cooling only)

REFNET header

H3

t

r

a

REFNET header

REFNET joint (A~G)

m

H3

t

a

r

p

n

B5

b

A

o

8

H2

n

m

j

k

i

h

f

g

: BS Unit

e

d

1234567

B1 B2 B3 B4 B5 B6

c

b

8

o

B

k

i

g

e

B1 B2 B3 B4

c

B1 ~ B6

H2

j

h

f

123456 7

: BS Unit

d

540 ft

≤

Indoor unit (Cool/Heat selection possible)
:

: Indoor unit (Cooling only)

1 ~ 6

7 , 8

Example 8 : a + o

Indoor unit (Cool/Heat selection possible)
:

: Indoor unit (Cooling only)

43 ft)

43 ft)

≤

≤

33 ft

33 ft

≤

≤

(Equivalent length

(Equivalent length

r

t

Outside unit

r

130 ft

≤

t

Outside unit

B1 ~ B5

1 ~ 4 , 7 , 8

5 , 6

s

8

r

pn

H2

qom

H1

H1

r

pn

e

d

REFNET joint (A~G)

c

B1 ~ B5

1 ~ 4 , 7 , 8

5 , 6

Example 6 : a + b + ≤ 540 ft, 8 : a + m + n + p ≤ 540 ft

S

8

H2

qom

Example 6 : b + ≤ 130 ft, 8: m + n + p ≤ 130 ft Example 8 : o

ki

b

Branch with REFNET joint Branch with REFNET joint and header Branch with REFNET header

f

B1 B2 B3 B4

ABCDE

a

Outside unit

REYQ

Single

system

outside

side

(2 pipes)

Indoor unit

Gas pipe

side

(3 pipes)

Outside unit

Example of connection

(Connection of 8 indoor units)

Suction gas pipe

Liquid pipe

BS

Unit

HP/LP gas pipe

Liquid pipe

j

G

1234567

F

g

: BS Unit

: Indoor unit (Cool/Heat selection possible)

: Indoor unit (Cooling only)

Outside unit Outside unit

1 ~ 6

7 , 8

B1 ~ B4

First outside unit multi connection piping kit

REYQ

72~120 PATJ

72~120 PAYD

Suction gas pipe

HP/LP gas pipe

Liquid pipe

(Bold) : 3 pipes

Piping from outside unit to BS unit

(Suction) gas pipe

Liquid pipe

(Thin) : 2 pipes

Piping from BS unit to indoor unit or

Piping from Refrigerant branch kit to

indoor unit used as cooling only

H3

t

r

(*1) “ ” Indicate the Outside unit multi

connection piping kit.

(*2) In case of multi outdoor system, re-read

“outside unit” to “the first Outside unit

ki

b

a

Multi

multi connection piping kit” as seen from

the indoor unit.

G

1234567

F

f

B1 B2 B3 B4

ABCDE

outside

g

REYQ

REYQ

system

144~192 PAYD

144~192 PATJ

: BS Unit

: Indoor unit (Cool/Heat selection possible)

: Indoor unit (Cooling only)

B1 ~ B4

1 ~ 6

7 , 8

Equivalent pipe length between outside unit (*2) and indoor unit ≤ 620 ft (Note 1)

Pipe length between outside unit (*2) and indoor unit ≤ 540 ft

Example 8 : a + b + c + d + e ≤ 540 ft

(Assume eqivalent pipe length of REFNET joint to be 1.6 ft, that of REFNET header to be 3.3 ft, that of BSVQ36 · 60 · 96 to be 13 ft, for calculation purposes)

Total piping length from outside unit (*2) to all indoor unit ≤ 3280 ft

Actual pipe

length

Equivalent

length

Total extention length

Between outside unit (*2)

and indoor unit

length

allowable

Maximum

Equivalent pipe length from first outside unit multi connection piping kit to outside unit ≤ 43 ft

Actual pipe length from first outside unit multi connection piping kit to outside unit ≤ 33 ft

Actual and

Equivalent

Between first outside unit multi

connection piping kit and outside unit

Difference in height between adjacent outside units (H3) ≤ 16 ft

Difference in height between outside unit and indoor unit (H1) ≤ 164 ft (Max 130 ft if the outside unit is below)

Difference in height between adjacent indoor units (H2) ≤ 49 ft

pipe length

Difference in height

Difference in height

Difference in height

(in case of multi system)

Between outside and indoor units

Between indoor and indoor units

Between outside and outside units

height

Allowable

difference

Actual pipe length from first refrigerant branch kit (either REFNET joint or REFNET header) to indoor unit ≤ 130 ft (Note 2)

Example 8 : b + c + d + e + s ≤ 130 ft

Actual pipe

length

Allowable length after the branch

6 English

2 pipes

KHRP26M22H or KHRP26M33H

KHRP26M33H

KHRP26M72H

3 pipes

Refrigerant branch kit name

KHRP25M33H

KHRP25M72H

Connecting piping kit name

(unit : in.)

BHFP26P90U

Piping size (O. D.)

Example REFNET header :

Indoor units 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8

φ3/8

φ1/2

φ5/8

Liquid pipe

φ1/2

φ5/8

φ3/4

φ1-1/8

HP/LP gas pipe

φ5/8

φ3/4

φ7/8

φ1-1/8

Suction gas pipe

(unit : in.)

φ1/4

φ3/8

Liquid pipe

Piping size (O. D.)

φ1/2

φ5/8

gas pipe

(unit : in.)

× < 72

72 ≤ × < 111

111 ≤

Choose from the following table in accordance with the total capacity index of all

the indoor units connected below the REFNET header.

Indoor unit total capacity index

How to select the REFNET header

Refrigerant branch kit name

KHRP25M33T

REYQ72 · 96PA type

Outside unit capacity type

When using REFNET joint at the first branch counted from the outside unit side,

choose from the following table in accordance with the outside unit capacity type.

(Example : REFNET joint A)

How to select the REFNET joint

How to select the outside unit multi connection piping kit

Refrigerant branch kit name

KHRP25M72TU

REYQ120~192PA type

Choose the REFNET joints other than the first branch from the following table in accordance

with the total capacity index of all the indoor units connected below the REFNET joint.

2 units

Choose from the following table in accordance with the number of outside units.

Number of outside unit

(This is required when the system is multi outside unit system.)

Piping between refrigerant branch kits

Piping between refrigerant branch kit and BS unit

Piping between BS unit and refrigerant branch kit

2 pipes

KHRP26M22T

3 pipes

KHRP25M22T

× < 72

Indoor unit total capacity index

Example REFNET joint B : Indoor units 7 + 8

KHRP26M33T

KHRP26M72TU

KHRP25M33T

KHRP25M72TU

72 ≤ × < 111

111 ≤ ×

(unit : in.)

Example REFNET header : Indoor units 1 + 2 + 3 + 4 + 5 + 6

Choose from the following table in accordance with the outdoor

units system capacity type.

Piping between outside unit(*2 and refrigerant branch kit (partA)

Example REFNET joint C : Indoor units 5 + 6 + 7 + 8

unit and refrigerant branch kit (part A)

column for gas pipe and Liquid pipe column for liquid pipe.

*1 Connection piping must not exceed the refrigerant Piping size between outside

Choose from the following table in accordance with the total capacity type of all the

indoor units connected downstream.

φ3/8

Liquid pipe

φ5/8

φ3/4

HP/LP gas pipe

Piping size (O. D.)

φ3/4

φ7/8

Suction gas pipe

Outside unit

capacity type

REYQ72PA type

REYQ96PA type

Indoor capacity index

*2 When selecting 2 pipes line(gas pipe and liquid pipe), use Suction gas pipe

φ1/2

φ5/8

φ7/8

φ1-1/8

φ1-1/8

REYQ120PA type

REYQ144PA type

REYQ168PA type

REYQ192PA type

18

48

·

·

12

36

·

111 ≤ × < 162

162 ≤ ×

72 ≤ × < 111

× < 54

54 ≤ × < 72

Match to the size of the connection pipng on the indoor unit.

Piping between refrigerant branch kit, BS unit and indoor unit.

(unit : in.)

φ3/8

Liquid pipe

φ3/4

HP/LP gas pipe

Piping size (O. D.)

φ7/8

Suction gas pipe

Choose from the following table in accordance with the capacity type of

the outside unit connected.

Outside unit

capacity type

Piping between outside unit multi connection piping kit and outside unit (part B)

REMQ72 · 96PA type

·

09

30

·

·

Indoor unit capacity type

07

24

Piping size (O. D.) φ3/4

Equalizer pipe (part C) (outside multi system only)

Equalizer pipe

(part C)

Piping between outside unit

multi connection piping kit

Example for indoor units

connected downstream

special separately sold Outside unit multi connection piping

kit. (BHFP26P90U).

(For how to select the proper kit, follow the table at right.)

• Refrigerant branch kits can only be used with R410A.

• When multi outdoor system are installed, be sure to use the

Outside unit multi connection piping kit and

Refrigerant branch kit selection

series or T joint (field supplyed).

• Never use BHFP26M90U, BHFP22M90U for M type of this

Pipe size selection

Outside unit

The thickness and material shall be selected in

accordance with local code.

For an outside unit installation, make

the settings in accordance with the

following figure.

and outside unit (part B)

Piping between outside unit multi

connection piping kits

Piping between outside unit and

refrigerant branch kit (part A)

English 7

φ1-3/8 → φ1-1/2*

H1

p

8

1.1 lb 1.1 lb

MODEL NAME

REYQ72 ~ 192PATJ

REYQ72 ~ 192PAYD

r : φ1/2 × 1ft.

s : φ3/8 × 1ft.

REFRIGERANT AMOUNT FOR EXCEEDING

CONNECTION CAPACITY OF INDOOR UNIT

INDOOR CONNECTION

CAPACITY

MORE THAN 100%

120% OR LESS

MORE THAN 120%

130% OR LESS

7.9 lb

2.2 lb

REFRIGERANT

THE AMOUNT OF

HEAT RECOVER SYSTEM

MODEL NAME

REYQ72 ~ 120PAYD

REYQ72 ~ 120PATJ

REYQ144 ~ 192PAYD

REYQ144 ~ 192PATJ

n : φ3/8 × 5ft.

m : φ3/8 × 10ft.

j : φ3/8 × 5ft.

i : φ3/8 × 5ft.

f : φ3/8 × 5ft.

e : φ3/8 × 5ft.

1.02

a : φ3/4 × 15ft.

0.175

0.081

0.015

b : φ3/4 × 10ft.

u : φ5/8 × 1ft.

t : φ3/8 × 1ft.

p : φ1/4 × 5ft.

o : φ1/4 × 5ft.

l : φ3/8 × 10ft.

k : φ3/8 × 10ft.

h : φ3/8 × 5ft.

g : φ3/8 × 5ft.

d : φ3/8 × 5ft.

c : φ3/8 × 5ft.

116%

REYQ192PAYD

Liquid pipe

φ5/8 → φ3/4

φ1/2 → φ5/8

φ3/8 → φ1/2

System

Increase the pipe size as follows

φ7/8 → φ1*

φ5/8 → φ3/4

φ3/8 → φ1/2

REFNET joint (A-G)

φ1-1/8 → φ1-1/4*

φ3/4 → φ7/8

Outside unit

φ1/2 → φ5/8

g

bcdef

ABCDEFG

a

Indoor units ( 1 - 8 )

1234567

hi j kl mn

(Total length (ft)

of liquid piping

size at φ3/4)

0.249

(Total length (ft)

of liquid piping

size at φ7/8)

R =

[HEAT RECOVER SYSTEM]

How to calculate the

additional refrigerant

to be charged

(Total length (ft)

(Total length (ft)

of liquid piping

size at φ1/2)

0.121

(Total length (ft)

(Total length (ft)

of liquid piping

size at φ5/8)

Additional refrigerant to

be charged : R(lb)

R should be rounded

off in units of 0.1 lb.

REYQ72 · 96PA type

REYQ120 · 144PA type

of liquid piping

size at φ1/4)

REYQ168 ~ 192PA type

0.040

a+b×2+c×2+d×2+e×2+f×2+g×2

8 b+c+d+e+f+g+p≤ 295 ft.

increase the pipe size of b, c, d, e, f, g

Round off in units of 0.1 lb.

a, b u r c~n, s, t o, p

of liquid piping

size at φ3/8)

Outside system : REYQ192PAYD

Total capacity of indoor unit : 116%

Example for refrigerant branch using REFNET joint and REFNET heder for systems and each pipe length as shown below.

= 11.182 11.1lb

R = ( 25 × 0.175 + 1 × 0.121 + 1 × 0.081 + 75 × 0.040 + 10 × 0.015 ) × 1.02 + 2.2 + 1.1

+h+i+j+k+l+m+n+p≤ 3280 ft.

Required Conditions Example Drawings

When the equivalent pipe length between outside and indoor units is 295 ft or more,

the size of main pipes on the liquid side (refer to figure 15)

must be increased according to the right table.

(Never inxrease suction gas pipe and HP/LP gas pipe.)

(Refer to figure 15)

1.Outdoor unit

2.Main pipes

3.Increase only liquid pipe size

4.First refrigerant branch kit

5.BS unit

6.Indoor unit

Allowable length after the first refrigerant branch kit to indoor units is 130 ft or less, however it can be extended up to 295 ft

Note 1.

if all the following conditions are satisfied. (In case of "Branch with REFNET joint")

kit and the final branch kit. (Reducers must be procured on site)

However, the pipes that are same pipe size with main pipe must

Note 2.

1. It is necessay to increase the pipe size between the first branch

above pipes must be doubled.

not be increased

(except main pipe and the pipes that are not increased)

2. For calculation of Total extension length, the actual length of

The farthest indoor unit 8

The nearest indoor unit 1

h, i, j....... p ≤ 130 ft.

3. Indoor unit to the nearest branch kit ≤ 130 ft.

(a+b+c+d+e+f+g+p)-(a+h)≤ 130 ft.

[Outside unit to the farthest indoor unit]

and [Outside unit to the nearest indoor unit] ≤ 130 ft.

4. The difference between
*If available on the site, use this size. Otherwise it can not be increased.

8 English

7. FIELD WIRING

NOTE

• All field wiring and components must be installed by a licensed elec-

trician and must comply with relevant local and national regulations.

• Be sure to use a dedicated power circuit. Never use a power supply

shared by another appliance.

• Never install a phase advancing capacitor. As this unit is equipped

with an inverter, installing a phase advancing capacitor will not only
deteriorate power factor improvement effect, but also may cause
capacitor abnormal heating accident due to high-frequency waves.

• Only proceed with wiring work after blocking off all power.

• Always ground wires in accordance with relevant local and national

regulations.

• This machine includes an inverter device. Connect earth and leave

charge to eliminate the impact on other devices by reducing noise
generated from the inverter device and to prevent leaked current
from being charged in the outer hull of the product.

• Do not connect the ground wire to gas pipes, sewage pipes, lightning

rods, or telephone ground wires.

Gas pipes : can explode or catch fire if there is a gas leak.
Sewage pipes : no grounding effect is possible if hard plastic piping

is used.
Telephone ground wires and lightning rods : dangerous when
struck by lightning due to abnormal rise in electrical potential in the
grounding.

• Be sure to install an earth leakage circuit breaker.

This unit uses an inverter, so install the earth leakage circuit breaker
that be capable of handling high harmonics in order to prevent mal­functioning of the earth leakage circuit breaker itself.

• Earth leakage circuit breaker which are especially for protecting

ground-faults should be used in conjunction with main switch or fuse
for use with wiring.

• Electrical wiring must be done in accordance with the wiring dia-

grams and the description herein.

• Do not operate until refrigerant piping work is completed.

(If operated before complete the piping work, the compressor may
be broken down.)

• Never remove thermistor, sensor or etc. when connecting power wir-

ing and transmission wiring.
(If operated with thermistor, sensor or etc. removed, the compressor
may be broken down.)

• This product have reversed phase protection detector that only

works when the power is turned on. If there exists blackout or the
power goes on and off which the product is operating, attach a
reversed phase protection circuit locally. Running the product in
reversed phase may break the compressor and other parts.

• Attach the power wire securely. Introducing power with a missing N-

phase or with a mistaken N-phase will break the unit.

• Never connect the power supply in reversed phase.

The unit can not operate normally in reversed phase.
If you connect in reversed phase, replace two of the three phases.

• Make sure the electrical unbalance ratio is no greater than 2%. If it is

larger than this, the unit’s lifespan will be reduced.
If the ratio exceeds 4%, the unit will shut down and an malfunction
code will be displayed on the indoor remote controller.

• Connect the wire securely using designated wire and fix it with attached

clamp without applying external pressure on the terminal parts (terminal
for power wiring, terminal for transmission wiring and earth terminal).

• If there exists the possibility of reversed phase, lose phase, momen-

tary blackout or the power goes on and off while the product is oper­ating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor
and other parts.

7-1 Power circuit, safety device and cable

requirements

• A power circuit (see the following table) must be provided for connec-

tion of the unit. This circuit must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage circuit breaker.

• When using residual current operated circuit breakers, be sure to

use a high-speed type (0.1 second or less) 200mA rated residual
operating current.

• Use copper conductors only.

• Use insulated wire for the power cord.

• Select the power supply cable type and size in accordance with rel-

evant local and national regulations.

• Specifications for local wiring power cord and branch wiring are in

compliance with local cord.

REYQ72PAYD
REYQ96PAYD
REYQ120PAYD
REYQ144PAYD
REYQ168PAYD
REYQ192PAYD

REYQ72PATJ

REYQ96PATJ

REYQ120PATJ

REYQ144PATJ

REYQ168PATJ

REYQ192PATJ

Phase and
frequency

φ 3, 60Hz 460V 16.0A 20A AWG18-16
φ 3, 60Hz 460V 20.4A 25A AWG18-16
φ 3, 60Hz 460V 20.5A 25A AWG18-16
φ 3, 60Hz 460V 33.4A 25A+25A AWG18-16
φ 3, 60Hz 460V 37.0A 25A+25A AWG18-16
φ 3, 60Hz 460V 40.6A 25A+25A AWG18-16

Phase and
frequency

φ 3, 60Hz

φ 3, 60Hz

φ 3, 60Hz

φ 3, 60Hz

φ 3, 60Hz

φ 3, 60Hz

Vol t ag e

Vol t ag e

208-

230V

208-

230V

208-

230V

208-

230V

208-

230V

208-

230V

Minimum

circuit amp.

Minimum

circuit amp.

36.1A 40A AWG18-16

43.8A 45A AWG18-16

44.2A 50A AWG18-16

57.6A 40A+40A AWG18-16

64.9A 40A+50A AWG18-16

72.2A 50A+50A AWG18-16

Recom-

mended fuses

Recom-

mended fuses

Transmission

line selection

Transmission

line selection

7-2 Wiring Connection Example for Whole System

(Refer to figure 16)

1. Power supply

2. Main switch

3. Earth leakage circuit breaker

4. Fuse

5. Outside unit

6. COOL/HEAT selector

7. Remote controller

8. Indoor unit

9. BS unit

NOTE

•

Make sure the weak electric wiring (i.e. for the remote controller, between
units, etc.) and the power wiring do not pass near each other, keeping
them at least 2 in. apart.
Proximity may cause electrical interference, malfunctions, and breakage.

• Be sure to connect the power wiring to the power wiring terminal
block and secure it as described in “7-5 Power Wiring Connection

Procedure”.

• Transmission wiring should be secured as described in “7-4 Trans-
mission Wiring Connection Procedure”.

• Secure wiring with clamp such as insulation lock ties to avoid contact

with piping.

• Shape the wires to prevent the structure such as the EL. COMPO.
BOX lid deforming. And close the cover firmly.

• All field wiring is to be procured on site.

7-3 Leading wire Procedure

• The power wiring and ground wiring are passed out from the power

wiring hole on the sides, the front (knock hole) or the bottom frame
(knock hole) .

• The transmission wiring is passed out from the wiring hole (knock
hole) on the front of the unit or from a piping hole.

(Refer to figure 17-1)

1. Electric wiring diagram

Printed on the back of the EL.COMPO.BOX lid.

2. Knockout hole

3. Power line

4. Transmission line

(Refer to figure 17-2)

1. EL.COMPO.BOX lid

2. Service lid

3. [Service precautions] Label location

English 9

NOTE

• Open the knock holes with a hammer or the like.

• After knocking out the holes, we recommend you remove any burrs

and paint them using the repair paint to prevent rusting.

(Refer to figure 17-1, 2)

• When passing wiring through the knock holes, remove burrs around

the knock holes and protect the wiring with protective tape.

(Refer to figure 17-1, 2)

• If small animals might enter the unit, block off any gaps (hatching

parts in figure 17-1, 2) with material (field supply).

7-4 Transmission Wiring Connection Procedure

• Referring to figure 18 connect the transmission wiring between out-

side unit and indoor unit, outside unit and outside unit of other sys­tem, outside unit and outside unit of same system.

(Refer to figure 18)

1. EL. COMPO. BOX (1)

2. EL. COMPO. BOX (2)

3. Do not open the EL. COMPO. BOX (2) lid.

(There are no work when installation)

4. Never connect the power wire.

5. To outside unit of other system

6. Use duplex wires (No polarity)

7. BS unit

8. Indoor unit

9. Indoor unit (Cooling only)

NOTE

• Do not connect the power wiring to terminals for the transmission

wiring. Doing so would destroy the entire system.

• When connecting wires to the terminal block on the PC-board, too

much heat or tightening could damage the PC-board. Attach with care.
See the table below for the tightening torque of the transmission wiring
terminals.

Screw size Tightening torque (ft · lbf)

M3.5 (A1P) 0.59 ~ 0.71

• Transmission wiring (About the symbol ~ , see figure 18)

should be done within the following limitations.
If they are exceeded, transmission problems may occur.

Between outside unit and BS (or indoor) unit

1

Between BS unit and indoor unit
Between outside unit and outside unit of other systems

Max. wiring length : 3280 ft
Max. total wiring length : 6560 ft
Max. no. of branches : 16

Max. no. of outside units of other system
that can be connected : 10

(Refer to figure 19)

1. Branch

2. Branch after branch

Between outside unit and outside unit of same system

2

Max. wiring length : 100 ft

• The transmission wiring inside the EL.COMPO.BOX should be

secured using the clamp (1) as shown in figure 20.

(Refer to figure 20)

1. In the EL.COMPO.BOX

2. Retain to the EL.COMPO.BOX with the accessory clamp (1).

3. Vinyl tube (accessory)

• Outside the units, the transmission wiring must be finished simulta-

neously with the local refrigerant piping, and wound with tape (field
supply) as shown in figure 21.

[Note]
No branch is allowed after branch (See figure 19)

1 2

(Refer to figure 21)

1. Suction gas pipe

2. HP/LP gas pipe

3. Liquid pipe

4. Insulation material

5. Finishing tape

6. Transmission wiring

• Wiring to other systems should be connected to terminals F1 and F2

(TO OUT/D UNIT) on the PC-board of the EL. COMPO. BOX(1).

7-5 Power Wiring Connection Procedure

• Be sure to connect the power supply wiring to the power supply ter-

minal block and hold it in place using the included clamp as shown in
the figure 22.

• The L1, L2, L3 and N phases of the power wiring should be secured

separately to the hook using the included clamp (1).

• The ground wiring should be bound to the power wiring using the

included clamp (1) to prevent outside force from being applied to the
terminal area.

(Refer to figure 22)

1. Power supply

(MODEL PAYD:3~460V 60Hz)
(MODEL PATJ:3~208-230V 60Hz)

2. Earth leakage circuit breaker

3. Branch switch, earth leakage circuit breaker

4. Ground wire

5. EL. COMPO. BOX (1)

6. EL. COMPO. BOX (2)

7. Do not open the EL. COMPO. BOX (2) lid.

(There are no work when installation)

8. Attach insulation sleeves

9. Power supply terminal block

10. Ground terminal

11. Clamp (1) (accessory)

12. Vinyl tube (accessory)

CAUTION

• Be sure to use crimp-style terminal with insulating sleeves for con-

nections. (See the figure below.)

Crimp-style terminal

• For wiring, use the designated power wire and connect firmly, then

secure to prevent outside pressure being exerted on the terminal board.

• Use an appropriate screwdriver for tightening the terminal screws. A

screwdriver with a small head will strip the head and make proper
tightening impossible.

• Over-tightening the terminal screws may break them.

See the following table for the tightening torque of the terminal screws.

Screw size Tightening torque (ft · lbf)

M8 Power terminal, ground terminal 4.06 ~ 5.38

• When pulling the ground wire out, wire it so that it comes through the

cut out section of the cup washer. (See the figure below.) An improper
ground connection may prevent a good ground from being achieved.

Crimp-style terminal

Power wire

Insulating sleeve

Cup washer

Cut out section

10 English

• When two wires are connected to a single terminal, connect them so

that the rear sides of the crimp contacts face each other. Also, make
sure the thinner wire is on top, securing the two wires simultaneously
to the resin hook using the included clamp (1).

Terminal
block

Crip style
terminal

Wire : narrow

Wire : thick

8. AIR TIGHT TEST AND VACUUM DRYING

• After finished piping work, carry out air tight test and vacuum drying.

NOTE

• Always use nitrogen gas for the airtightness test.

• Absolutely do not open the shutoff valve until the main power ciruit

insulation measurement has been completed. (measuring after the
shutoff valve is opened will cause the insulation value to drop.)

Resin hook

7-6 Procedure for Wiring Inside Units

• Referring to figure 23, secure and wire the power and transmission

wiring using the included clamp (1), (2), and (3).

• Wire so that the ground wiring does not come into contact with the

compressor lead wiring.
If they touch, this may have an adverse effect on other devices.

•

The transmission wiring must be at least 2 in. away from the power wiring.

• Make sure all wiring do not contact to the pipes (hatching parts in the

figure 23).

(Refer to figure 23)

1. Secure to the hook of column support using the accessory

calmp (1).

2. Electric conduit

3. When routing out the power/ground wires from the left side.

4. When routing out the transmission wiring from the opening

for piping.

5. When routing out the power/ground wires from the front.

6. Clear over 2 in..

7. When routing out the transmission wiring from the knockout

hole.

8. When routing out the power/ground wires from the right side.

9. Power wiring

10. Ground wire

11. Transmission wiring

12. When wiring, exercise sufficient caution not to detach the

acoustic insulators from the compressor.

13. Secure to the back side of the support beam using the

accessory clamp (1).

14. Retain to the back of the column support with the accessory

clamp (2).

Precautions when knocking out knockout holes

• To punch out a knockout hole, hit it with a hammer.

• Open an appropriate hole as needed.

• After knocking out the holes trim off the burr, then we recommend

you to paint the edges and areas around the edges using the repair
paint to prevent rusting.

• Power line : Open a knockout hole as shown at left and connect

it using a conduit.

• Transmission line : Connect it using a conduit in the knockout hole

on the right.

Conduit
(field supply)

Conduit mounting plate
(accessory)

NOTE

• After wiring work is completed, check to make sure there are no loose

connections among the electrical parts in the EL.COMPO.BOX.

Lock nut
(field supply)

Burr

Left side Right side

Knockout hole

<Needed tools>

• To prevent entry of any impurities and insure

Gauge manifold
Charge hose
valve

sufficient pressure resistance, always use the
special tools dedicated for R410A.

• Use charge hose that have pushing stick for

connecting to service port of shutoff valves or
refrigerant charge port.

• The vacuum pump for vacuum drying should

Vacuum pump

be able to lower the pressure to –14.6 psi.

• Take care the pump oil never flow backward

into the refrigerant pipe during the pump stops.

<The system for air tight test and vacuum drying>

• Referring to figure 24, connect a nitrogen tank, refrigerant tank, and

a vacuum pump to the outside unit.
The refrigerant tank and the charge hose connection to refrigerant
charge port or the valve A in figure 24 are needed in “11. ADDI-

TIONAL REFRIGERANT CHARGE AND CHECK OPERATION”.

(Refer to figure 24)

1. Gauge manifold

2. Nitrogen

3. Measuring device

4. R410A tank (with siphon)

5. Vacuum pump

6. Charge hose

7. Refrigerant charge port

8. HP/LP gas pipe shutoff valve

9. Suction gas pipe shutoff valve

10. Liquid pipe shutoff valve

11. Valve A

12. Valve B

13. Valve C

14. Outside unit

15. To BS (or indoor) unit

16. Shutoff valve

17. Service port

18. Field piping

19. Gas flow

NOTE

• The air-tightness test and vacuum drying

should be done using the service ports of
equalizer pipe, HP/LP gas pipe, suction gas
pipe and liquid pipe shutoff valve.
See the [R410A] Label attached to the front
plate of the outside unit for details on the loca­tion of the service port (see figure at right)

• See [Shutoff valve operation procedure] in
“11-1 Before working” for details on handling

the shutoff valve.

[R410A] Label

• The refrigerant charge port is connected to unit pipe.
When shipped, the unit contains the refrigerant, so use caution when
attaching the charge hose.

<Air tight test>

Pressurize the liquid pipe, suction gas pipe, HP/LP gas pipe and
equalizer pipe from the service ports of each shutoff valve to 550 psi
(do not pressurize more than 550 psi). If the pressure does not drop
within 24 hours, the system passes the test.
If there is a pressure drop, check for leaks, make repairs and perform
the airtight test again.

English 11

<Vacuum drying>

Evacuate the system from the liquid pipe, suction gas pipe, HP/LP
gas pipe and equalizer pipe shutoff valve service ports by using a
vacuum pump for more than 2 hours and bring the system to
–14.6 psi or less. After keeping the system under that condition for
more than 1 hour, check if the vacuum gauge rises or not. If it rises,
the system may either contain moisture inside or have leaks.

NOTE

If moisture might enter the piping, follow belows.
(I.e., if doing work during the rainy season, if the actual work takes
long enough that condensation may form on the inside of the
pipes, if rain might enter the pipes during work, etc.)

After evacuating the system for 2 hours, pressurize the system to 7.25
psi (vacuum break) with nitrogen gas and evacuate the system again
using the vacuum pump for 1 hour to –14.6 psi or less (vacuum drying).
If the system cannot be evacuated to –14.6 psi within 2 hours, repeat
the operation of vacuum break and vacuum drying.
Then, after leaving the system in vacuum for 1 hour, confirm that the
vacuum gauge does not rise.

10. CHECKING OF DEVICE AND INSTALLA­TION CONDITIONS

Be sure to check the followings.

For those doing electrical work

1.

Make sure there is no faulty transmission wiring or loosing of a nut.
See “7-4 Transmission Wiring Connection Procedure”.

2.

Make sure there is no faulty power wiring or loosing of a nut.
See “7-5 Power Wiring Connection Procedure”.

3.

Has the insulation of the main power circuit deteriorated?
Measure the insulation and check the insulation is above regular
value in accordance with relevant local and national regulations.

For those doing pipe work

1.

Make sure piping size is correct.
See “

6-1 Selection of piping material and Refrigerant branching kit”.

2.

Make sure insulation work is done.
See “9. PIPE INSULATION”.

3.

Make sure there is no faulty refrigerant piping.
See “6. REFRIGERANT PIPING”.

9. PIPE INSULATION

• Insulation of pipes should be done after performing “8. AIR TIGHT
TEST AND VACUUM DRYING”.

• Always insulate the liquid piping, the HP/LP gas piping, the gas pip-

ing, and these pipe connections.
Failing to insulate the pipes may cause leaking or burns.
Especially, be sure to insulate the HP/LP gas piping as withstanding
as the suction pipe because the suction gas follows in the HP/LP gas
piping when the system is whole cooling mode.
And be sure to use the insulation which can withstand such temper­atures of 248°F or more for the HP/LP gas piping, the equalizer pipe
and the gas piping because the HP/LP gas follows in these pipings.

• Reinforce the insulation on the refrigerant piping according to the
installation environment. Condensation might form on the surface of
the insulation. Refer to the below.
 Ambient temperature : 86°F, humidity : 75% to 80% RH : min.

thickness : 9/16 in..

 If the ambient temperature exceeds 86°F and the humidity 80%

RH, then the min. thickness is 3/4 in..
See the Engineering data book for detail.

• If there is a possibility that condensation on the shutoff valve might
drip down into the indoor unit through gaps in the insulation and pip­ing because the outside unit is located higher than the indoor unit,
etc., this must be prevented by caulking the connections, etc.

(Refer to figure 25)

• The piping lead-out hole lid should be attached after opening a
knock hole. (Refer to figure 26)

• If small animals and the like might enter the unit through the piping

lead-out hole, close the hole with blocking material (procured on site)
after completion of “11. ADDITIONAL REFRIGERANT CHARGE

AND CHECK OPERATION”. (Refer to figure 29)

(Refer to figure 25)

1. Insulation material

2. Caulking, etc.

(Refer to figure 26)

1. Piping lead-out hole lid

2. Open a knock hole at “ ”.

3. Block “ ”.

NOTE

• After knocking out the holes, we recommend you remove burrs in the

knock holes (See figure 26) and paint the edges and areas around
the edges using the repair paint.

11. ADDITIONAL REFRIGERANT CHARGE AND CHECK OPERATION

The outside unit is charged with refrigerant when shipped from the factory,
but depending on the size and length of the piping when installed, it may
require additional charging.
For charging the additional refrigerant, follow the procedure in this chapter.
And then carry out the check operation.

11-1 Before working

[About the refrigerant tank]

Check whether the tank has a siphon pipe before charging and place
the tank so that the refrigerant is charged in liquid form.
(See the figure below.)

With siphon pipe

Stand the tank upright and charge.
(The siphon pipe goes all the way inside,
so the tank does not need be put
upside-down charge in liquid form.)

Other tanks

Stand the tank upside-down and charge.

NOTE

• Always use the proper refrigerant (R410A). If charged with the refrig-

erant containing an improper material, it may cause an explosion or
accident.

•

R410A is a mixed refrigerant, so charging it as a gas will cause the refrig­erant composition to change, which may prevent normal operation.

[Shutoff valve operation procedure]

When operating the shutoff valve, follow the procedure instructed below.

NOTE

• Do not open the shutoff valve until “10. CHECKING OF DEVICE
AND INSTALLATION CONDITIONS” are completed. If the shutoff

valve is left open without turning on the power, it may cause refriger­ant to buildup in the compressor, leading insulation degradation.

• Be sure to use the correct tools.
The shutoff valve is not a back-seat type. If forced it to open, it might
break the valve body.

• When using a service port, use the charge hose.

• After tightening the cap, make sure no refrigerant gas is leaking.

12 English

Tightening torque

The sizes of the shutoff valves on each model and the tightening torque
for each size are listed in the table below.

<Size of Shutoff Valve>

72PA type 96PA type 120PA type

Liquid pipe
shutoff valve

Suction gas
shutoff valve

HP/LP gas
shutoff valve

(Refer to figure 27)

1. Service port

2. Cap

3. Hex holes

4. Shaft (valve body)

5. Seal section

[How to Check How Many Units are Connected]

It is possible to find out how many indoor or outside unit in the system are turned on by operating the push button on the PC-board (A1P) of outside unit.
Follow the procedure below to check how many indoor or outside units are turned on.

(1) Press the MODE button (BS1) once at Setting Mode 1 (H1P : off), and set the MON-

ITOR MODE (H1P : Blinking).

(2) Press the SET button (BS2) the number of times until the

LED display matches that at right.

(3) Press the RETURN button (BS3) and read the number of units from the display of

H2P through H7P.
[Reading Method]
The display of H2P through H7P should be read as a binary number, with j standing
for “1” and

Ex: For the LED display at right, this would be “010110”,
which would mean 22 units are connected.

The 120PA type corresponds to the φ1/2 - diameter
onsite piping using the accessory pipe.

The 72PA type corresponds to the φ3/4 - diameter
onsite piping using the accessory pipe.
The 96PA type corresponds to the φ7/8 - diameter
onsite piping using the accessory pipe.
The 120PA type corresponds to the φ1-1/8 - diameter
onsite piping using the accessory pipe.

(LED display: h ...OFF i ...ON j ...Blinking ∗ ...Uncertain)

h standing for “0”.

φ3/8

φ1

φ3/4

For checking the number of
outside units : eight times

For checking the number
of indoor units : five times

To open

1.

Remove the cap and turn the shaft counterclockwise with the hexa­gon wrench.

2.

Turn it until the shaft stops.

3.

Make sure to tighten the cap securely.
(For the tightening torque, refer to the item <Tightening Torque>.)

To clos e

1.

Remove the cap and turn the shaft clockwise with the hexagon
wrench.

2.

Securely tighten the valve until the shaft contacts the main body seal.

3.

Make sure to tighten the cap securely.
(For the tightening torque, refer to the item <Tightening Torque>.)

<Tightening torque>

Shutoff
valve size

φ 3/8 3.98 - 4.87

φ 1/2 5.97 - 7.30 13.3 - 16.2

φ 3/4

φ 1

Tightening torque ft · lbf (Turn clockwise to close)

Shaft (valve body) Cap (valve lid) Service port

Hexagonal

wrench 4mm

19.9 - 24.3

H1P H2P H3P H4P H5P H6P H7P

Hexagonal

wrench 8mm

LED display

9.95 - 12.17

8.48 - 10.3

16.6 - 20.3

jhhhhhh

jhhihhh

jhhhihi

j ∗∗∗∗∗∗

jhjhjjh

32 × 0 + 16 × 1 + 8 × 0 + 4 × 1 + 2 × 1 + 1 × 0 = 22 units

Note: “000000” indicates 64 units.

(4)

Press the MODE button (BS1) once. This returns to Setting Mode 1 (H1P : OFF, default).

hhihhhh

NOTE

Press the “MODE button” (BS1) if you get confused while operating.
This returns to Setting Mode 1 (H1P : OFF, default).

11-2 Procedure of Adding Refrigerant charging and

check operation

WARNING Electric Shock Warning

• Make sure to close the EL. COMPO. BOX lid before turning on the

power.

• Perform the setting on the PC-board (A1P) of the outside unit and

check the LED display after the power is on via the inspection door
which is in the EL. COMPO. BOX lid.

(Refer to figure 28)

1. EL. COMPO. BOX (1) (right)

2. Inspection door

3. EL.COMPO. BOX (2) (left)

4. Do not open the EL. COMPO. BOX (2) (left) lid or that

inspection door.

5. EL. COMPO. BOX (1) (right) lid

6. LED (H1~8P)

7. Push button (BS1~5)

8. Lift the protruding part to open the inspection door.

• Use an insulated rod to operate the push buttons via the EL.

COMPO. BOX’s inspection door.
There is a risk of electric shock if you touch any live parts, since this
operation must be performed with the power on.

English 13

CAUTION

• Make sure to use the protect tool (protective groves and goggles)

when charging the refrigerant.

• Due to a danger of liquid hammer, the refrigerant must not be charged

over the allowable maximum amount when charging the refrigerant.

• Do not perform the refrigerant charging operation under working for

the BS and indoor unit.

•

When opening the front panel, make sure to take caution to the fan rota­tion during the working.
After the outside unit stops operating, the fan may keep rotation for a while.

NOTE

• If operation is performed within 12 minutes after the BS, indoor and

outside units are turned on, H2P will be lit on and the compressor will
not operate.

Check the LED display indicate as shown below.

H1PH2PH3PH4PH5PH6PH7P

hhihhhh

• In order to ensure uniform refrigerant distribution, it may take up to

around 10 minutes for the compressor to start up after the unit start­ing operating. This is not a malfunction.

• The refrigerant charge port is connected to the piping inside the unit.

When the unit is shipped from the factory, the unit’s internal piping is
already charged with refrigerant, so be careful when connecting the
charge hose.

• After adding the refrigerant, make sure to close the lid of the refrig-

erant charging port.
The tightening torque for the lid is 8.48 to 10.3 ft · lbf.

• See [Shutoff valve operation procedure] in chapter 11-1 for details

on how to handle shutoff valves.

• When done or when pausing the refrigerant charging operation,

close the valve of the refrigerant tank immediately.
The refrigerant charge port of this product have electric expansion
valve.
The valve will be closed at end of refrigerant charging. However the
valve will be opened on operation after refrigerant charging (check
operation, nomal operation, etc.).
If the tank is left with the valve open, the amount of refrigerant which
is properly charged may be off the point.

• Make sure to perform the check operation after installation. Other-

wise, the malfunction code “U3” will be displayed and normal opera­tion cannot be performed.
And the failure of “Check of miswiring” may also cause abnormal
operation. Performance may drop due to the failure of “Judgment of
piping length”.

• Check operation must be performed for each refrigerant piping system.

Checking is impossible if plural systems are being done at once.

• The individual problems of indoor units can not be checked.

About these problems check by test run after the check operation is
completed. (See chapter 13)

• The check operation cannot be performed in recovery or other ser-

vice modes.

11-2-1 Procedure of Adding Refrigerant charging

1.

Make sure the following works are complete in accordance with the
installation manual.

 Piping work
 Wiring work
 Air tight test
 Vacuum drying
 Installation work for BS, indoor unit

2.

Calculate the “additional charging amount” using “How to calculate the
additional refrigerant to be charged” in “6-5 Example of connection”.

3.

Open the valve B (See the figure 29. The valve A,C and the liquid
pipe, suction gas pipe, HP/LP gas pipe, equalizer pipe shutoff valves
must be left closed), and charge the refrigerant of the “additional
charging amount” from the liquid side shutout valve service port.

(Refer to figure 29)

1. Measuring device

2. R410A tank (with siphon)

3. Charge hose

4. Refrigerant charge port

5. HP/LP gas pipe shutoff valve

6. Suction gas shutoff valve

7. Liquid pipe shutoff valve

8. Val ve A

9. Val ve B

10. Val ve C

11. Outside unit

12. To BS, indoor unit

13. Field pipings

14. Refrigerant flow

15. Shutoff valve

16. Service port

4.

If the “additional charging amount” was charged fully, close the valve
B and go to step 6.
If the “additional charging amount” was not charged fully, close the
valve B and go to step 5.

5.

Perform the refrigerant charging following [Automatic refrigerant
charging operation procedure] as shown below. And charge the
remaining refrigerant of the “additional charging amount”.

NOTE

• For performing the automatic refrigerant charging operation, the push

button on the PC-bord (A1) of outside unit are used. (See figure 28.)
And the refrigerant are charged from the refrigerant charge port via
the valve A. (See figure 30.) For operating the push button and open­ing or closeing the valves, follow the procedure.

• During Automatic refrigerant charging operation, the system will
select charging mode (cooling mode or heating mode) by the tem­perature condition as follows.

Outdoor temp. : 32˚F DB ~ 109˚F DB
Indoor temp. : 50˚F DB ~ 90˚F DB

Less than above range

When charging in cooling mode, the system will stop operation when
the required amount of refrigerant is charged.
During charging in heating mode, a person must manually close
valve A and stop operation.
Beforehand, check the remaining refrigerant that is needed to
charge based on the “additional charging amount” in step 2 and the
charged amount in step 3.

• The refrigerant will be charged about 66 lb in one hour at outdoor
temp. 86°F DB (about 26 lb at outdoor temp. 32°F DB).

• During Automatic refrigerant charging operation, you can stop the
operation forcedly by pushing MODE button (BS1).

(Refer to figure 30)

1. Measuring device

2. R410A tank (with siphon)

3. Charge hose

4. Refrigerant charge port

5. HP/LP gas pipe shutoff valve

6. Suction pipe shutoff valve

7. Liquid pipe shutoff valve

8. Val ve A

9. Val ve B

10. Val ve C

11. Outside unit

12. To BS, indoor unit

13. Field pipings

14. Refrigerant flow when charging

15. Shutoff valve

16. Service port

[Automatic refirgerant charging operation procedure]

NOTE

• The marks of LED mean as follows.

Cooling mode

Heating mode

h : OFF i : ON j : Blinking ∗ : OFF, ON or Brinking

(1) Open the liquid pipe, suction gas pipe and HP/LP gas pipe shutoff

valves. (The valve A~C must be closed. See figure 30.)

(2) • Close the EL. COMPO. BOX (1) lid and all front panel except on the

EL. COMPO. BOX (1) side. (*1) And turn the power to the outdoor
unit and all connected BS, indoor units. (*2)

14 English

• After H2P stop blinking (about 12 minutes after turning on the

power), check H2P is OFF.
If H2P is ON, check the malfunction code in the remote controller of
indoor unit and correct the malfunction in accordance with [Remote
controller display malfunction code] in chapter 11-2-2.

(3) Check the LED. And push the MODE button (BS1) once if the LED

displays is not as below.

H1P H2P H3P H4P H5P H6P H7P

hhihhhh

(4) Push the TEST button (BS4) once. (The LED displays will change as

below.)

H1P H2P H3P H4P H5P H6P H7P

iiiiiii

(5) Hold the TEST button (BS4) down for 5 seconds or more.

(The LED displays will change as below and fan of outside unit will
start rotation.)

H1P H2P H3P H4P H5P H6P H7P

hjhhh

(6) When the compressor start working and the LED displays change

any state in below (*3), go to “In case of cooling mode” or “In case of
heating mode” in accordance with the LED displays.

H1P H2P H3P H4P H5P H6P H7P

jjjhihi

jjh hihi

In case of cooling mode

(7) Push the TEST button (BS4) once within 5 minutes after procedure

(5) (*4) and close the all front panels (*5).
After that, open the valve A immediately (See figure 30) (*6) and
watch the remote controller display of indoor unit.

(8) If the remote controller display shows “PE” code (*7), ready to close

the valve A.
And go to procedure (9).
If the remote controller display shows other code, close the valve A
immediately and refer to [Remote controller cooling mode malfunc­tion code]

Beware the fan running when open the front panel.
The fan may continue rotation after the system stop the operation.

(9) When the compressor stop working (the fan may continue rotation.),

close the valve A immediately (*8).
And check the LED displays are as below and the remote controller
display shows “P9” code.

H1P H2P H3P H4P H5P H6P H7P

ijjiiii

After checking, push the MODE button (BS1) once and the charging
is complete.

In case of heating mode

(7) Push the TEST button (BS4) once within 5 minutes after procedure

(5) (*4) and close the all front panels.
After that, open the valve A immediately (See figure 30) (*6) and
check the charged amount by meauring device.
During operation, if the remote controller display shows “P2” or “P8”
code, close the valve A immediately and refer to [Remote controller
heating mode malfunction code].

Beware the fan running when open the front panel.
The fan may continue rotation after the system stop the operation.

(8) When the required amount of refrigerant is charged, close the valve

A (See figure 30) (*8) and push the RETURN button (BS3) once. And
then go to procedure (9).

(9) Push the MODE button (BS1) once, and the charging is complete.

Notes (*1)~(*9)

(*1) Lead the refrigerant charge hose etc from the pipe intake.

All front panels must be closed at the procedure (7).

(*2) • If you perform the refrigerant charging operation within the refrig-

erant system that have the power off unit, the operation cannot fin­ish properly.
Check the number of outside and indoor units that is powered.
For checking, see [How to check how many units are connected]
in chapter 11-1.

∗∗

Go to “In case of
cooling mode”

Go to “In case of
heating mode”

• To energize the crankcase heater, make sure to turn on for

6 hours before starting operation.

(*3) It takes about 2~10 minutes for getting stability of refrigerant state.

If the additional refrigerant is little and operation is started before
getting stability, the system can not judge the charging amount pre­cisely and it cause over charge.

(*4) If the TEST button (BS4) is not pushed within 5 minutes, “P2” code

will displayed in the remote controller. In this case, refer [Remote
controller cooling (or heating) mode malfunction code].

(*5) If the front panel is opened during the operation, the system cannot

operate properly.

(*6) If you leave the system without connecting the refrigerant tank or

opening the valve A for 30 minutes or more, the system stop oper­ation and “P2” code are displayed in remote controller.
In this case, refer [Remote controller cooling (or heating) mode mal­function code].

(*7) Depending on the situation of operation such as the charging

amount is little, the “PE” code may not be displayed and the “P9”
code may be displayed.

(*8) Always close the valve A and take the tank off.

The refrigerant charge port of this unit have electric expansion valve
and the valve are closed when charging is finished. However, the
valve will opened when ather operation (Check operation, nomal
operation, etc.). If you leave the tank connected, the refrigerant will
charged and it cause over charge.

[Remote controller cooling mode malfunction code]

Code The work contents

PE Charging is almost finished. Ready to close the valve A.

The refrigerant tank is empty. Close the valve A and replace
empty tank to the new tank. After changing the tank, open the

PA

valve A again.

PH

P8

P2

∗

P9

[Remote controller heating mode malfunction code]

Code The work contents

P8

P2

Beware the fan running. The outside unit does not stop
operation.

Close the valve A immediately, and restart the operation from
procedure (3).

Operation is interrupted. Close the
valve A immedeately and check the
below items.

• Check if HP/LP gas pipe, suction

gas pipe or liquid pipe shutoff
valve is opened.

• Check the refrigerant tank is con-

nected and the valve A was opend.

• Check if the air inlet and outlet of

the indoor unit are not closed by
an obstruction.

Operation is stoped abnormally. Close
the valve A immediately. Confirm the mal­function code and correct the abnormality
following the [Remote controller displays
malfunction code] in chapter 11-2-2.

Charging is finished. Close the valve A and take the refriger­ant tank off.

Close the valve A immediately and push the TEST button (BS4)
once. And restart from procedure (7) of “In case of heating mode”.

Operation is interrupted. Close the valve A immedeately and
check the below items.

• Check if HP/LP gas pipe, suction gas pipe or liquid pipe

shutoff valve is opened.

• Check the refrigerant tank is connected and the valve A

was opend.

• Check if the air inlet and outlet of the indoor unit are not

closed by an obstruction.

After correcting the
abnormality, restart
the operation from
procedure (3).

English 15

6.

After completing the additional refrigerant charging, record the charging
amount on the accessory “REQUEST FOR THE INDICATON” label
(Installation records) and adhere it to the back side of the front panel.

11-2-2 Procedure of check operation

• Check operation perform the following work. Do the check operation

following below.
Otherwise, malfunction code “U3” will be displayed in the remote
controller and nomal operation can not be carried out.

 Check of shutoff valve opening
 Check of miswiring
 Judgment of piping length
 Check of refrigerant overcharge

Field wiring is connected to "TO

U7, U4
UF, UH

If any malfunction codes other than the above are displayed, check the
service manual for how to respond.

MULTI UNIT (Q1,Q2)" terminal
on the outside unit PC-board
(A1P) when the system is one
outdoor system.

NOTE

Remove the line from the “TO MULTI UNIT
(Q1, Q2)” terminal.

12. ONSITE SETTINGS

NOTE

• Check operation can not carried out at outdoor temp. less than 23°F.

Perform the check operation at day or time that outdoor temp. is 23°F
or more.

[Check Operation Procedure]

(1) Close the EL. COMPO. BOX lid and all front panels except as the

side of the EL. COMPO. BOX and turn on the power to the outside
unit and all connected BS, indoor units. (Be sure to turn the power on
at least 6 hours before operation in order to have power running to
the crank case heater.)

(2) Make the onsite settings as needed using the push button (BS1-

BS5) on the outside unit PC-board (A1P) with the power on. (See
“12 Onsite Settings”)

(3) Perform the check operation following the Check Operation Method

of the [Service Precautions] label (lower) on the EL. COMPO. BOX
lid. (See figure 31) The system operation for about 40~60 minutes
and automatically stops the check operation.
If the malfunction code is not displayed in the remote controller after
the system stop, check operation is completed. Normal operation will
be possible after 5 minutes. If the malfunction code is displayed in the
remote controller, correct the malfunction following [Remote control­ler displays malfunction code] and perform the check operation again.

(Refer to figure 31)

1. EL. COMPO.BOX (1) lid

2. EL. COMPO.BOX (2) lid

3. [Service Precaution] label (upper)

4. [Service Precaution] label (lower)

NOTE

For interrupting the check operation, push RETURN button (BS3).

[Remote controller displays malfunction code]

Malfunc­tion code

E3, E4
F3, F6
UF

U1

U1
U4
LC

UF

E3
F6
UF

E4
F3

Installation error Remedial action

The shutoff valve of the outside
unit is left closed.

The phases of the power to
the outside unit is reversed.

No power is supplied to an
outside, BS or indoor unit
(including phase interruption).

There is conflict on the con­nection of transmission wir­ing in the system.

Refrigerant overcharge.

Insufficient refrigerant.

Open the shutoff valve.

Exchange two of the three phases (L1,
L2, L3) to make a proper connection.

Make sure the power source wire is
properly connected to the outside, BS or
indoor unit and revise if necessary.

Check if the refrigerant piping line and
the transmission wiring are consistent
with each other.

Recalculate the additional amount refrig­erant from the piping length and correct
the refrigerant charge level by recovering
any excessive refrigerant with a refriger­ant recovery machine.

•

Check if the additional refrigerant
charge has been finished correctly.

•

Recalculate the additional amount
refrigerant from the piping length and
add the adequate amount.

NOTE

In the case of a multi system, all onsite settings should be made on the
master unit. Settings made on sub units are invalid.
The outside unit to which the indoor unit transmission wire are con­nected is the master unit, and all other units are sub units.

Use the push button switches (BS1 through BS5) on the outside unit
PC-board (A1P) to make the necessary onsite settings.
See the “Service Precautions” label (upper) on the EL. CONPO. BOX lid
for details on the positions and operating method of the push button
switches and on the onsite setting.
Make sure to record the setting on the accessory “REQUEST FOR THE
INDICATION” label.

WARNING Electric Shock Warning

Use an insulated rod to operate the push buttons via the inspection door
of EL. COMPO. BOX lid.
There is a risk of electric shock if you touch any live parts, since this
operation must be performed with the power on.

13. TEST RUN

13-1 Before test run

• Make sure the following works are completed in accordance with the

installation manual.

 Piping work
 Wiring work
 Air tight test
 Vacuum drying
 Additional refrigerant charge
 Check operation

• Check that all work for the BS, indoor unit are finished and there are
no danger to operate.

13-2 Test Run

After all works are completed, operate the unit normally and check the
following.
(1) Make sure the indoor and outside units are operating normally.
(2) Operate each indoor unit one by one and make sure the correspond-

ing outside unit is also operating.

(3) Check to see if cold (or hot) air is coming out from the indoor unit.
(4) Push the fan direction and strength buttons on the remote controller

to see if they operate properly.

NOTE

• Heating is not possible if the outdoor temperature is 75°F or higher.

Refer to the Operation manual.

• If a knocking sound can be heard in the liquid compression of the com­pressor, stop the unit immediately and then energize the crank case
heater for a sufficient length of time before restarting the operation.

• Once stopping, the compressor will not restart in about 5 minutes
even if the On/Off button of the remote controller is pushed.

• When the system operation is stopped by the remote controller, the out­side units may continue operating for further 5 minutes at maximum.

• The outside unit fan may rotate at low speeds if the Night-time low
noise setting or the External low noise level setting is made, but this
is not a malfunction.

16 English

• If the check operation was not performed at first istallation, the malfunc-

tion code “U3” will be displayed in the remote controller. Perform the
check operation following “11-2-2 Procedure of Check Operation.

13-3 Checks After Test Run

Perform the following checks after the test run is complete.

• Record the contents of field setting.

→ Record them on the accessory “REQUEST FOR THE INDICA-

TION” label.
And attach the label on the back side of the front panel.

• Record the installation date.

→ Record the installation date on the accessory “REQUEST FOR

THE INDICATION” label in accordance with the IEC60335-2-40.
And attach the label on the back side of the front panel.

NOTE

After the test run, when handing the unit over to the customer, make
sure the EL.COMPO.BOX lid, the inspection door, and the unit casing
are all attached.

14. CAUTION FOR REFRIGERANT LEAKS

(Points to note in connection with refrigerant leaks)
Introduction
The installer and system specialist shall secure safety against

leakage according to local regulations or standards. The following
standards may be applicable if local regulations are not available.

The VRV System, like other air conditioning systems, uses R410A as
refrigerant. R410A itself is an entirely safe non-toxic, non-combustible
refrigerant. Nevertheless care must be taken to ensure that air condi­tioning facilities are installed in a room which is sufficiently large. This
assures that the maximum concentration level of refrigerant gas is not
exceeded, in the unlikely event of major leak in the system and this in
accordance to the local applicable regulations and standards.

Maximum concentration level

The maximum charge of refrigerant and the calculation of the maximum
concentration of refrigerant is directly related to the humanly occupied
space in to which it could leak.

The unit of measurement of the concentration is lb/ft
of the refrigerant gas in 1 ft

Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.

1. direction of the refrigerant flow

2. room where refrigerant leak has occurred (outflow of all the

refrigerant from the system)

Pay a special attention to the place, such as a basement, etc.
where refrigerant can stay, since refrigerant is heavier than air.

3

volume of the occupied space).

3

( the weight in lb

1

2

Procedure for checking maximum concentration

Check the maximum concentration level in accordance with steps 1 to 4
below and take whatever action is necessary to comply.

1.

Calculate the amount of refrigerant (lb) charged to each system sep­arately.

amount of refriger­ant in a single unit
system (amount of
refrigerant with
which the system
is charged before
leaving the factory)

NOTE

• Where a single refrigerant facility is divided into 2 entirely indepen-

dent refrigerant systems then use the amount of refrigerant with
which each separate system is charged.

2.

Calculate the smallest room volume (ft3 )
Incase like the following, calculate the volume of (A), (B) as a single
room or as the smallest room.

additional charging
amount (amount of

+

refrigerant added
locally in accordance
with the length or
diameter of the refrig­erant piping)

total amount
of refrigerant

=

(lb) in the
system

A.Where there are no smaller room divisions

B.Where there is a room division but there is an opening

between the rooms sufficiently large to permit a free flow of air
back and forth.

1

2

1. opening between rooms

(Where there is an opening without a door or where there are openings
above and below the door which are each equivalent in size to 0.15% or
more of the floor area.)

3.

4.

2. partition

Calculating the refrigerant density using the results of the calcula­tions in steps 1 and 2 above.

total volume of refrigerant in the
refrigerant system

3

) of smallest room in which

size (ft
there is an indoor unit installed

If the result of the above calculation exceeds the maximum concen­tration level then make similar calculations for the second then third
smallest room and so until the result falls short of the maximum con­centration.

Dealing with the situations where the result exceeds the maximum
concentration level.
Where the installation of a facility results in a concentration in excess
of the maximum concentration level then it will be necessary to
revise the system. Please consult your Daikin supplier.

maximum concen-

≤

tration level (lb/ft

3

)

English 17

1645 Wallace Drive, Suite 110
Carrollton, TX 75006

[e-mail]
www.daikinac.com

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