System air conditioner

INSTALLATION MANUAL

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REYQ18PY1REYQ20PY1REYQ22PY1REYQ24PY1

REYQ26PY1REYQ28PY1REYQ30PY1

REYQ32PY1REYQ34PY1REYQ36PY1

REYQ38PY1REYQ40PY1REYQ42PY1

REYQ44PY1REYQ46PY1REYQ48PY1 VRVIII System air conditioner

Installationmanual

CONTENTS1. FIRST OF ALL ......................................................................... 1

1-1. Safety considerations........................................................ 11-2. Special notice of product................................................... 21-3. Disposal requirements ...................................................... 2

2. INTRODUCTION...................................................................... 22-1. Combination...................................................................... 22-2. Standard supplied accessories ......................................... 32-3. Option accessory .............................................................. 32-4. Technical and Electrical specifications ............................. 32-5. Main components.............................................................. 3

3. SELECTION OF LOCATION ................................................... 34. INSPECTING AND HANDLING THE UNIT ............................. 45. PLACING THE UNIT................................................................ 46. REFRIGERANT PIPING .......................................................... 4

6-1. Selection of piping material and Refrigerant branching kit 46-2. Protection against contamination when installing pipes.... 56-3. Pipe connection ................................................................ 56-4. Connecting the refrigerant piping...................................... 56-5. Example of connection...................................................... 7

7. FIELD WIRING ...................................................................... 107-1. Power circuit, safety device and cable requirements...... 107-2. Wiring Connection Example for Whole System .............. 107-3. Leading wire Procedure .................................................. 107-4. Transmission Wiring Connection Procedure................... 117-5. Power Wiring Connection Procedure.............................. 117-6. Procedure for Wiring Inside Units ................................... 12

8. AIR TIGHT TEST AND VACUUM DRYING........................... 129. PIPE INSULATION ................................................................ 1210. CHECKING OF DEVICE AND

INSTALLATION CONDITIONS.............................................. 1311. ADDITIONAL REFRIGERANT CHARGE AND

CHECK OPERATION ............................................................ 1311-1.Before working............................................................... 1311-2.Procedure of Adding Refrigerant charging and check

operation1412. ONSITE SETTINGS............................................................... 1613. TEST RUN ............................................................................. 16

13-1.Before test run ............................................................... 1613-2.Test Run ........................................................................ 1613-3.Checks After Test Run................................................... 16

14. CAUTION FOR REFRIGERANT LEAKS............................... 16

1. FIRST OF ALL• This document is an installation manual for the Daikin REYQ-P

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 considerationsPlease read these “Safety considerations” carefully before installing air conditioning unit and be sure to install it correctly. The safety pre-cautions listed here are divided into two categories. In either case, important safety information is listed which must be read carefully.

Warning........Failure to observe a warning may result in death or serious injury.

Caution.........Failure to observe a caution may result in injury or damage to the unit.These too might lead to serious injury depend-ing on the circumstances.

Warning

• Ask your dealer or qualified personnel to carry out installation work. Do not try to install the machine yourself.Improper installation may result in water leakage, electric shocks or fire.

• Perform installation work in accordance with this installation manual.Improper installation may result in water leakage, electric shocks or fire.

• When installing the unit in a small room, take measures against to keep refrigerant concentration from exceeding allowable safety limits in the event of refrigerant leakage. Excessive refrigerant in a closed ambient can lead to oxygen defi-ciency. Contact your dealer for more information.

• Be sure to use only the specified accessories and parts for instal-lation work.Failure to use the specified parts may result in water leakage, electric shocks, fire or the unit falling.

• Install the air conditioner on a foundation strong enough to with-stand the weight of the unit.A foundation of insufficient strength may result in the unit falling and causing injuries.

• Carry out the specified installation work after taking into account strong winds, typhoons or earthquakes.Improper installation work may result in the unit falling and caus-ing accidents.

• Make sure that a separate power supply circuit is provided for this unit and that all electrical work is carried out by qualified person-nel according to local and national regulations and this installation manual.An insufficient power supply capacity or improper electrical con-struction may lead to electric shocks or fire.

• Be sure to establish an earth.Do not earth the unit to a utility pipe, arrester or tele-phone earth.Incomplete earth may cause electrical shock or fire. A high surge current from lightning or other sources may cause damage to the air conditioner.

• Be sure to install an earth leakage breaker.Failure to install an earth leakage breaker may result in electric shocks or fire.

• Before touching electrical parts, turn off the power.Failure to turn off the power may result in electric shocks.

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

• When wiring the power supply and connecting the remote control-ler wiring and transmission wiring, position the wires so that the EL.COMPO.BOX lid can be securely fastened.Improper positioning of the EL.COMPO.BOX lid may result in electric shocks or fire.

• If the refrigerant gas leaks during installation, ventilate the area immediately.Toxic gas may be produced if the refrigerant gas comes into con-tact with fire.

• After completing the installation work, check that the refrigerant gas does not leak.Toxic gas may be produced if the refrigerant gas leaks into the room and comes into contact with a source of fire, such as a fan heater, stove or cooker.

• Do not directly touch the refrigerant leaked from refrigerant piping connections. Frostbite may be caused.

• Do not allow children to mount on the outdoor unit, or avoid placing any object on it. Falling or tumble may result in injury.

Caution

• While following the instructions in this installation manual, install drain piping in order to ensure proper drainage and insu-late piping in order to prevent condensation.Improper drain piping may result in water leakage and property damage.

• Install the indoor, BS and outdoor units, power supply wiring and connecting wiring at least 1 meter away from televisions or radios in order to prevent image interference or noise.(Depending on the radio waves, a distance of 1 meter may not be sufficient enough to eliminate the noise.)

1 English

• The indoor and BS unit should be installed as far away from fluo-rescent lighting as possible.Remote controller (wireless kit) transmitting distance can result shorter than expected in rooms with electronic fluorescent lamps (inverter or rapid start types).

• Do not install the air conditioner in the following locations:(a) where a mineral oil mist or an 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 produced.Corroding copper pipes or soldered parts may result in refrig-erant leakage.

(c) near machinery emitting electromagnetic waves.Electromagnetic waves may disturb the operation of the con-trol system and result in a malfunction of the unit.

(d) where flammable gas may leak, where there are carbon fiber or ignitable dust suspensions in the air, or where volatile flam-mables such as thinner or gasoline are handled.Operating the unit in such conditions may result in fire.

(e) Locations where small animals might build nests inside the unit.If small animals enter and come in contact with electrical parts, this can cause malfunctions, smoke, and fire.

1-2 Special notice of product[CLASSIFICATION]This air conditioner comes under the term “appliances not accessible to the general public”.[EMC CHARACTERISTICS]VRVIII System is a class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.[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.TightTake 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 refrig-erant 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.

Limit by the total maximum refrigerant chargeThe total maximum refrigerant charge of a VRVIII system must be below 100kg, this to be in accordance with CE requirement (EN60335-2-40 standard).This means that in case the total maximum refrigerant charge of the system (factory and additional charge) is equal to or more than 100kg you must divide your multiple outdoor system into smaller independent systems, each containing less than 100kg refrigerant charge.For factory charge, refer to the unit name plate.

Important information regarding the refrigerant usedThis product contains fluorinated greenhouse gases covered by the Kyoto Protocol. Do not vent gases into the atmosphere.Refrigerant type : R410A

GWP (1) value : 1975(1) GWP = global warming potentialPlease fill in with indelible ink,■ the factory refrigerant charge of the product,■ the additional refrigerant amount charged in the field and■ + the total refrigerant charge on the refrigerant charge label supplied with the product. The filled out label must be adhered in the proximity of the product charging port (e.g. onto the inside of the service cover).

(2) In case of multiple outdoor systems, only 1 label must be adhered, mentioning the total factory refrigerant charge of all outdoor units connected on the refrigerant system.

[DESIGN PRESSURE]Since design pressure is 4.0MPa or 40bar (for R407C units : 3.3MPa or 33bar), the wall thickness of pipes should be more carefully selected in accordance with the relevant local and national regulations.

1-3 Disposal requirementsDismantling 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-P series are designed for outdoor installation and used for

cooling and heating aplications. The REYQ18-48P system is multi outdoor unit system, which are only composed of REMQ8-16P outdoor units. With a multi system combining up to three out-door units, rated cooling capacity from 50.4kW to 135kW and rated heating capacity from 56.5kW to 150 kW can be achieved.

• The BS units that combined with REYQ-P system for changing the refrigerant flow to indoor units are BSVQ100, 160, 250P type only. To combine with other type BS unit will cause malfunction.

• The indoor units that combined with REYQ-P system for air con-ditioning 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 system name and that independent units are as follows.⟨The system name⟩ ⟨Independent units⟩REYP18PY1............REMQ10PY1 REMQ8PY1REYP20PY1............REMQ12PY1 REMQ8PY1REYP22PY1............REMQ12PY1 REMQ10PY1REYP24PY1............REMQ12PY1 REMQ12PY1REYP26PY1............REMQ16PY1 REMQ10PY1REYP28PY1............REMQ16PY1 REMQ12PY1REYP30PY1............REMQ16PY1 REMQ14PY1REYP32PY1............REMQ16PY1 REMQ16PY1REYP34PY1............REMQ16PY1 REMQ10PY1 REMQ8PY1REYP36PY1............REMQ16PY1 REMQ12PY1 REMQ8PY1REYP38PY1............REMQ16PY1 REMQ12PY1 REMQ10PY1REYP40PY1............REMQ16PY1 REMQ12PY1 REMQ12PY1REYP42PY1............REMQ16PY1 REMQ16PY1 REMQ10PY1REYP44PY1............REMQ16PY1 REMQ16PY1 REMQ12PY1REYP46PY1............REMQ16PY1 REMQ16PY1 REMQ14PY1REYP48PY1............REMQ16PY1 REMQ16PY1 REMQ16PY1

• The indoor units can be installed in the following range.⟨Outdoor unit⟩ ⟨Total capacity of indoor units⟩REYQ18PY1 .......................... 225 ~ 585REYQ20PY1 .......................... 250 ~ 650REYQ22PY1 .......................... 275 ~ 715REYQ24PY1 .......................... 300 ~ 780REYQ26PY1 .......................... 325 ~ 845REYQ28PY1 .......................... 350 ~ 910REYQ30PY1 .......................... 375 ~ 975REYQ32PY1 .......................... 400 ~1040REYQ34PY1 .......................... 425 ~1105REYQ36PY1 .......................... 450 ~1170REYQ38PY1 .......................... 475 ~1235

3

56

2

1

4 1 factory refrigerant charge of the product : see unit name plate (2)

2 additional refrigerant amount charged in the field

3 total refrigerant charge

4 Contains fluorinated greenhouse gases covered by the Kyoto Protocol

5 outdoor unit

6 refrigerant cylinder and manifold for charging

English 2

REYQ40PY1 .......................... 500 ~1300REYQ42PY1 .......................... 525 ~1365REYQ44PY1 .......................... 550 ~1430REYQ46PY1 .......................... 575 ~1495REYQ48PY1 .......................... 600 ~1560

• For installing the 2 units multi system, Outdoor unit multi connec-tion piping kit "BHFP26A90" are required.For installing the 3 units multi system, Outdoor unit multi connec-tion piping kit "BHFP26A136" are required.

• When installing the multi system, connect the units as following order.If install the system with different order, the Outdoor unit multi connection piping kit may not suit and some pipe size reducer (field supply) may be required.

• If the total capacity of the connected indoor units exceeds the capacity of the outdoor unit, cooling and heating performance may drop when running the indoor units. See the capacity table in the Engineering Data Book for details.

2-2 Standard supplied accessoriesConfirm the following accessories are included. The storage location of the accessories is shown in figure 1.

NoteDo not throw away any of the accessories until installation is com-plete. They are needed for installation work.

(Refer to figure 1)1. Clamps, Manuals, etc.2. Accessory pipes

2-3 Option accessoryTo install the outdoor units, the following optional parts are also required. To select an optimum kit, refer to “6. REFRIGERANT PIPING”.• Outdoor unit multi connection piping kit

• Refrigerant branching kit

• Pipe size reducer

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

2-4 Technical and Electrical specificationsRefer to the Engineering Data Book for the complete list of specifications.

2-5 Main componentsFor main components and function of the main components, refer to the Engineering Data Book.

3. SELECTION OF LOCATIONSelect a location for installation that meets the following conditions and get the customer’s permission.1. There is no danger of fire due to leakage of inflammable gas.2. Select the location of the unit in such a way that neither the dis-

charged air nor the sound generated by the unit disturb anyone.3. The foundation is strong enough to support the weight of the unit

and the floor is flat to prevent vibration and noise generation.4. The piping length between the outdoor unit and the indoor unit

may not exceed the allowable piping length.(Refer to “6. REFRIGERANT PIPING”)

5. Locations where the unit’s suction vent and outlet vent do not gen-erally 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.

6. The space around the unit is adequate for servicing and the min-imum 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 refer-

ence for cooling operation when the outdoor temperature is 35°C. If the design outdoor temperature exceeds 35°C or the heat load exceeds maximum capacity in all the outdoor 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 pat-tern 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 side2. No limit to wall height3. Service space of front side4. Service space of suction side

For Patterns 1 and 2 in figure 2 :• Wall height for front side – no higher than 1500 mm.• Wall height on the suction side – no higher than 500 mm.• Wall height for sides – no limit.• 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.

Number of outdoor units connected 2 units 3 unitsKit name BHFP26A90 BHFP26A136

to indoor unit

Outdoor unit A

Outdoor unit B

Outdoor unit C

Outdoor unit multi connection piping kit (first branch)

Outdoor unit multi connection piping kit (second branch)

Unit capacity

A ≥ B ≥ C

2 pcs.

Shape

Liquid sideaccessorypipe (1)

Equalizer sideaccessory pipe(1)

Equalizer sideaccessory pipe(2)

L typeaccessoryjoint (1)

L typeaccessoryjoint (2)

Liquid sideaccessorypipe (2)

Suction gasside accessorypipe (1)

Suction gasside accessorypipe (2)

HP / LP gasside accessorypipe (1)

HP / LP gasside accessorypipe (2)

1 pc. 1 pc. about each item

Clamp(1)

(Large)

1 pc.

1 pc.

1 pc.

8 pcs.

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pc.1

(Small)

8 · 10 type

14 · 16 type

Qua

ntity

Quantity

Clamp(3)

Shape

Name

Name

Name

pcs.2

12 type

8 · 10 type

14 · 16 type

12 type pc.1

Manuals, etc.

Shape

Qua

ntity

• Operation manual• Installation manual• Declaration of conformity (PED)• "REQUEST FOR THE INDICATON"

label (Installation records)• "ADDITIONAL REF. CHARGE" label

1 pc.

1 pc.

1 pc.

1 pc.

1 pc.

1 pc.

2 pcs.

2 pcs.

1 pc. 1 pc.

φ22.2 φ28.6 φ22.2 φ28.6 φ19.1 φ22.2 φ22.2

φ19.1 φ25.4 φ19.1

for 3 pipingREFNET header – KHRP25M33H KHRP25M72H KHRP25M73HREFNET joint KHRP25A22T KHRP25A33T KHRP25A72T KHRP25A73T

for 2 pipingREFNET header KHRP26M22H KHRP26M33H KHRP26M72H KHRP26M73HREFNET joint KHRP26A22T KHRP26A33T KHRP26A72T –

for 3 piping for 2 pipingfor REFNET header KHRP25M72HP KHRP25M73HP KHRP26M73HPfor REFNET joint KHRP25M72TP KHRP25M73TP –

3 English

Note1. An inverter air conditioner may cause electronic noise gener-

ated 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 3 meters for indoor remote controllers, place power wiring and transmission wiring in conduits, and ground the conduits.

(Refer to figure 3)1. Indoor unit2. Branch switch, overcurrent breaker3. Remote controller4. COOL/HEAT selector5. Personal computer or radio

2. When installing in a 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 accumu-

lating on the fins.3. If condensate may drip on downstairs (or walkway) depending

on the floor condition, take a measure such as the installation of central drain pan kit (sold separately).

4. The refrigerant R410A itself is nontoxic, nonflammable and is safe. If the refrigerant should leak however, its concentration may exceed the allowable limit depending on room size. Due to this it could be necessary to take measures against leakage. See “14. CAUTION FOR REFRIGERANT LEAKS” for details.

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 8m 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. Fork2. Hole (large)3. Transportation clasp (yellow)4. Fixed screws of transportation clasp

(Refer to figure 5)1. Belt sling2. Filler cloth or Board3. Hole (large)4. Hole (small)

NoteApply a filler cloth on a fork to prevent coating of the bottom frame from coming off and rust from occurring when bringing the unit using a forklift.

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 150mm from the floor.• Secure the unit to its base using foundation bolts. (Use four com-

mercially available M12-type foundation bolts, nuts, and washers.)• The foundation bolts should be inserted 20 mm.

(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. 4-15×22.5 (Hole for foundation bolt)2. (Depth of product)3. (Inner dimension of the base)4. (Outer dimension of the base)

Note• When installing central drain pan kit (optional accessory), con-

struct the bace by independent base (with center support type) or beam base (Horizontal) in figure 6.

• There are restrictions on the refrigerant pipe connecting order between outdoor 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 outdoor unit when it is running.

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

6. REFRIGERANT PIPINGNote• All field piping must be installed by a licensed refrigeration techni-

cian 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 phos-phor copper brazing filler metal (BCuP-2 : JIS Z 3264, B-Cu93P-710/795 : ISO 3677) which does not require flux.(Flux has extremely harmful influence on refrigerant piping sys-tems. 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, mois-ture, or other contamination. (Foreign materials inside pipes including oils for fabrication must be 30mg/10m or less.)

• Use the following items for the refrigerant piping.Material : Jointless phosphor-deoxidized copper pipeSize : See “6-5 Example of connection” to determine the correct size.Thickness : Select a thickness for the refrigerant piping which complies with national and local laws.For R410A, the design pressure is 4.0 MPa (40-bar).

h215

00

<Front side> <Suction side>

500 h22

or more

Servicespace

h12

or more

h150

0

+ +

Model A B

8 · 10 · 12HP type 930 792

14 · 16HP type 1240 1102

20

Resin washers

English 4

The minimum thickness of piping according to Japan’s High-Pressure Gas Safety Law (as of January 2003) is shown below.Temper grade (O type, 1/2H type) in the table indicate the material types specified in JIS H 3300.

(unit : mm)

(unit : mm)

• For piping work, follow the maximum tolerated length, difference in height, and length after a branch indicated in the “6-5 Example of connection”.

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

6-2 Protection against contamination when installing pipesProtect the piping to prevent moisture, dirt, dust, etc. from entering the piping.

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

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 compres-sors in the refrigerating system and preventing normal operation.

(Refer to figure 8)1. Refrigerant pipe2. Location to be brazed3. Nitrogen4. Taping5. Handy valve6. Regulator

• The pressure regulator for the nitrogen released when doing the brazing should be set to about 0.02 MPa (0.2kg/cm2 : Enough to feel a slight breeze on your cheek).

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

6-4 Connecting the refrigerant piping1. Direction to bring out the pipes

The local interunit piping can be connected either forward or to the sides (taken out through the bottom) as shown in the figure 10. When passing out through the bottom, use the knock hole in the bottom frame.

(Refer to figure 10)1. Left-side connection2. Front connection3. 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 6mm bit. (Refer to figure 11)

(Refer to figure 11)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 wir-

ing with a conduit or bushings, making sure not to damage the wiring.2. Removing Pinch Piping

• When connecting refrigerant piping to an outdoor unit, remove the pinch piping using the procedure in the figure 12.(Refer to figure 12)

• About handling of shutoff valves, refer to [Shutoff valve opera-tion 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 dis-solve the brazing, causing damage.

(Refer to figure 12)1. Pich piping (4 pieces)2. Do not remove the relay piping.3. Pinch piping4. 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,

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

3. Connecting refrigerant piping to outdoor units• Figure 13 shows the example of connecting refrigerant piping to

outdoor units.• The local interunit piping next accesorry pipes are field supplyed.• About the detail of connecting pipes between outdoor units on

outdoor unit multi system, refer to the "4. Precautions when connecting piping between outdoor units" and the installation manual attached to the outdoor unit multi connection piping kit.<In case of single system : 5-18HP type>

(Refer to figure 13)1. When connected to the front2. 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 valve6. Suction gas pipe shutoff valve7. HP/LP gas pipe shutoff valve8. Equalizer pipe shutoff valve9. Brazing

10. Liquid side accessory pipe (1)11. Suction gas side accessory pipe (1)12. HP/LP gas side accessory pipe (1)13. Equalizer side accessory pipe (1)14. L type accessory joint (1)15. L type accessory joint (2)16. Liquid side accessory pipe (2)17. Suction gas side accessory pipe (2)18. In case of Q14 · 16 type : HP/LP gas side accessory pipe (2)

In case of Q8 ~ 12 type : HP/LP gas side accessory pipe (1)19. Equalizer side accessory pipe (2)

Note• Equalizer pipe is only for connection between outdoor units on

multi outdoor unit system.That is not connect to indoor units.

• About the connection of equalizer pipe for 3 outdoor units multi system, refer to the installation manula of outdoor unit multi con-nection piping kit.

• Make sure the onsite piping does not come into contact with other piping or the bottom frame or side panels of the unit.

4. Precautions when connecting piping betweemn outdoor unitsThe Outdoor unit multi connection piping kit (sold separately) is needed to connect piping between outdoor units in multi system. Only proceed with piping work after considering the limitations on installation listed here and in “5. Branching the refrigerant pip-ing”, always referring to the kit’s installation manual.(1) About outdoor unit multi connection piping kit

• Install the joint horizontally so that the attached warning label faces strait up, and the tilt is within ±15°. (Refer to figure 16-1)Do not install vertically. (Refer to figure 16-2)

Temper grade O type

outer diameter φ6.4 φ9.5 φ12.7 φ15.9

smallest thickness 0.80 0.80 0.80 0.99

Temper grade 1/2H type

outer diameter φ19.1 φ22.2 φ25.4 φ28.6 φ31.8 φ34.9 φ38.1 φ41.3

smallest thickness 0.80 0.80 0.88 0.99 1.10 1.21 1.32 1.43

Place Installation period Protection method

OutdoorMore than a month Pinch the pipeLess than a month

Pinch or tape the pipeIndoor Regardless of the period

5 English

• Maintain a straight portion of 500 mm or more until the split of the joint without wrapping any onsite piping around this area. Over 500 mm of straight area can be maintained by connect-ing at least 120 mm of onsite pipe (straight) to the joint.(Refer to figure 16-3)

(Refer to figure 16)1. Warning label2. Horizontal surface3. ±15° or less4. Ground5. Onsite pipe (120mm length or more)6. Straight part of 500mm or more7. C-arrow view8. D-arrow view

(2) The piping between outdoor units must be installed level (Pattern 1) or with a rise (Pattern 2). Otherwise oil may pool in the pipes.

(3) To avoid the risk of oil detention in the stopping unit, always connect the shutoff valve and the piping between outdoor units as shown A or B in the figure below.

(4) If the piping length between the outdoor units exceeds 2 m, create a rise of 200 mm or more in the suction gas and HP/LP gas piping under a length of 2 m from the outdoor unit multi connection piping kit.

5. Branching the refrigerant pipingHeed the restrictions below when installing the refrigerant branch-ing kit and read the installation instruction manual with the kit.(Improper installation could lead to malfunctioning or breakdown of the outdoor unit.)

<REFNET joint>Install the REFNET joint so it splits horizontally or vertically.

(Refer to figure 14)1. Horizontal2. A-arrow view3. Horizontal surface4. ±30° or less5. Vertical

<REFNET header>Install the REFNET header so it splits horizontally.

(Refer to figure 15)1. Horizontal surface2. B-arrow view

Pattern 1

Pattern 2

Prohibited pattern

Change to pattern 1 or pattern 2

to indoor unit

to indoor unit

to indoor unit

to indoor unit

Piping between outdoor units

to indoor unitPiping between outdoor units

Downward inclination

Downward inclination

Oil remains in piping

Front connections

Side (bottom) connections

Front connections

Side (bottom) connections

Front connections

Side (bottom) connections

Level

Rise

Downwardinclination

UnitA

UnitB

UnitC

UnitA

UnitB

UnitC

UnitA

UnitB

UnitC

UnitA

UnitB

UnitC

UnitA

UnitB

UnitC

UnitA

UnitB

UnitC

Rise

Rise

to indoorunit

A

BA

B

Front connections Side (bottom) connections

Prohibited pattern

Oil remains in the stopping outdoor unit.

Change to pattern 1 or pattern 2

Front connections

Side (bottom) connections

to indoor unit

to indoor unit

Oil remains in the unit Bwhen system stops.

Unit A

Change as shownin the figure below.

Rising height :200 mm or more

Unit B Unit C

Unit B Unit C

Unit A

Unit A

UnitA

UnitB

UnitC

UnitB

UnitC

UnitA

UnitA

UnitB

UnitA

UnitB

UnitC

UnitC

UnitA

UnitB

UnitA

UnitB

UnitC

UnitC

Connect straightly

Oil remains in the unit Bwhen system stops.

Change as shownin the figure below.

Connect straightly Put rising

to indoor unit

to indoor unit

If less than 2m

If 2 m or moreRising height : 200 mm or more

Rising height : 200 mm or more

less than 2m

less than 2mless than 2m

UnitA

UnitB

UnitC

UnitA

UnitB

UnitC

Suction gas pipe andHP/LP gas pipebetween outdoor units

Suction gas pipe andHP/LP gas pipebetween outdoor units

English 6

6-5 Example of connection

Exa

mp

le o

f co

nn

ecti

on

(Con

nect

ion

of 8

indo

or u

nits

)O

utdo

or u

nit

side

(3 p

ipes

)

Indo

or u

nit

side

(2 p

ipes

)

Suc

tion

gas

pipe

HP

/LP

gas

pip

e

Liqu

id p

ipe

Gas

pip

e

Liqu

id p

ipe

BS

Uni

t

Suc

tion

gas

pipe

HP

/LP

gas

pip

eLi

quid

pip

e

(Suc

tion)

gas

pip

eLi

quid

pip

e

Pip

ing

from

out

door

uni

t to

BS

uni

t

Pip

ing

from

BS

uni

t to

indo

or u

nit o

r P

ipin

g fr

om R

efrig

eran

t bra

nch

kit t

oin

door

uni

t use

d as

coo

ling

only

(Bol

d):3

pip

es

(Thi

n):2

pip

es

(*1)

"

"

Indi

cate

the

Out

door

uni

t mul

ti

co

nnec

tion

pipi

ng k

it.(*

2) In

cas

e of

mul

ti ou

tdoo

r sy

stem

, re-

read

"ou

tdoo

r un

it" to

"th

e fir

st O

utdo

or u

nit

mul

ti co

nnec

tion

pipi

ng k

it" a

s se

en fr

om

th

e in

door

uni

t.

Bra

nch

wit

h R

EF

NE

T jo

int

Bra

nch

wit

h R

EF

NE

T jo

int

and

hea

der

Bra

nch

wit

h R

EF

NE

T h

ead

er

Sin

gle

ou

tdo

or

syst

emR

EY

Q8~

16

Mu

lti

ou

tdo

or

syst

emR

EY

Q18

~48

Out

door

uni

t

Out

door

uni

tO

utdo

or u

nit

Out

door

uni

t

Out

door

uni

tO

utdo

or u

nit

RE

FN

ET

join

t (A

~G

)

RE

FN

ET

join

t (A

~G

)

B1

~ B

4: B

S U

nit

1 ~

6: I

ndoo

r un

it (C

ool/H

eat s

elec

tion

poss

ible

)7

, 8

: Ind

oor

unit

(Coo

ling

only

)

RE

FN

ET

join

t (A

~G

)

RE

FN

ET

hea

der

RE

FN

ET

hea

der

Firs

t out

door

uni

t mul

ti co

nnec

tion

pipi

ng k

it

RE

FN

ET

join

t (A

~G

)

RE

FN

ET

hea

der

RE

FN

ET

hea

der

Max

imum

allo

wab

lele

ngth

Allo

wab

lehe

ight

diffe

renc

e

Allo

wab

le le

ng

th a

fter

th

e b

ran

ch

Bet

wee

n ou

tdoo

r un

it (*

2)an

d in

door

uni

t

Betw

een

first

out

door

uni

t mul

tico

nnec

tion

pipi

ng k

it an

d ou

tdoo

r uni

t(in

cas

e of

mul

ti sy

stem

)

Betw

een

outd

oor a

nd in

door

uni

tsBe

twee

n in

door

and

indo

or u

nits

Betw

een

outd

oor a

nd o

utdo

or u

nits

Act

ual p

ipe

leng

th

Equ

ival

ent

leng

th

Act

ual a

ndE

quiv

alen

tpi

pe le

ngth

Act

ual p

ipe

leng

th

Diffe

rence

in he

ight

Diffe

rence

in he

ight

Diffe

rence

in he

ight

Total

exten

tion l

ength

Pip

e le

ngth

bet

wee

n ou

tdoo

r un

it (*

2) a

nd in

door

uni

t ≤ 1

65m

Exa

mpl

e 8

: a

+ b

+ c

+ d

+ e

+ s

≤ 1

65m

Exa

mpl

e 6

: a

+ b

+

≤ 1

65m

, 8

: a

+ m

+ n

+ p

≤ 1

65m

Exa

mpl

e 8

: a

+ o

≤ 1

65m

Equ

vale

nt p

ipe

leng

th b

etw

een

outd

oor

unit

(*2)

and

indo

or u

nit ≤

190

m (

Not

e 1)

(Ass

ume

eqiv

alen

t pip

e le

ngth

of R

EFN

ET

join

t to

be 0

.5m

, tha

t of R

EFN

ET

head

er to

be

1m, t

hat o

f BS

VQ

100,

160

to b

e 4m

, tha

t of B

SV

Q25

0 to

be

6m fo

r cal

cula

tion

purp

oses

)T

otal

pip

ing

leng

th fr

om o

utdo

or u

nit (

*2)

to a

ll in

door

uni

t ≤ 1

000m

Act

ual p

ipe

leng

th fr

om fi

rst o

utdo

or u

nit m

ulti

conn

ectio

n pi

ping

kit

to o

utdo

or u

nit ≤

10m

Equ

ival

ent p

ipe

leng

th fr

om fi

rst o

utdo

or u

nit m

ulti

conn

ectio

n pi

ping

kit

to o

utdo

or u

nit ≤

13m

Act

ual p

ipe

leng

th fr

om fi

rst r

efrig

eran

t bra

nch

kit (

eith

er R

EF

NE

T jo

int o

r R

EF

NE

T h

eade

r) to

indo

or u

nit ≤

40m

(N

ote

2)E

xam

ple

8 :

b +

c +

d +

e +

s ≤

40m

Diff

eren

ce in

hei

ght b

etw

een

outd

oor

unit

and

indo

or u

nit (

H1)

≤ 5

0m (

Max

40m

if th

e ou

tdoo

r un

it is

bel

ow)

Diff

eren

ce in

hei

ght b

etw

een

adja

cent

indo

or u

nits

(H

2) ≤

15m

Diff

eren

ce in

hei

ght b

etw

een

adja

cent

out

door

uni

ts (

H3)

≤ 5

m

Out

door

uni

tr

≤ 10

m(E

quiv

alen

t len

gth

≤ 13

m)

u +

s ≤

10m (Equ

ival

ent l

engt

h ≤

13m

)u

+ t

≤ 10

m(E

quiv

alen

t len

gth

≤ 13

m)

Exa

mpl

e 6

: b

+

≤ 40

m, 8

: m +

n +

p ≤

40m

Exa

mpl

e 8

: o

≤ 4

0m

ab

cd

e

ab

cd

e

H1

H1 H1

H2

sr

pn

fk

i

fk

i

qo

m

pn

qo

m

gG

Fj

AB

CD

E

H1

Sr

AB

CD

E

B1

B2

B3

B4

12

34

56

7

8

H2

gG

F

12

34

56

7

8

B1

~ B

5: B

S U

nit

1 ~

4 ,

7 ,

8: I

ndoo

r un

it (C

ool/H

eat s

elec

tion

poss

ible

)5

, 6

: Ind

oor

unit

(Coo

ling

only

)

B1

~ B

4: B

S U

nit

1 ~

6

: Ind

oor u

nit (

Coo

l/Hea

t sel

ectio

n po

ssib

le)

7 ,

8: I

ndoo

r un

it (C

oolin

g on

ly)

B1

~ B

4: B

S U

nit

1 ~

6

: Ind

oor u

nit (

Coo

l/Hea

t sel

ectio

n po

ssib

le)

7 ,

8: I

ndoo

r un

it (C

oolin

g on

ly)

B1

~ B

5: B

S U

nit

1 ~

4 ,

7 ,

8: I

ndoo

r un

it (C

ool/H

eat s

elec

tion

poss

ible

)5

, 6

: Ind

oor

unit

(Coo

ling

only

)

B1

~ B

4: B

S U

nit

1 ~

6: I

ndoo

r un

it (C

ool/H

eat s

elec

tion

poss

ible

)7

, 8

: Ind

oor

unit

(Coo

ling

only

)

aa

m

m

c d

e f

g h

i jk

o

n

A

A

B

H2

B1

B2

B3

B4

B5

12

34

56

7

8

H3

rt

s

H3

H3

rt

s

a

b

c d

e fh

koB

8

H2

ur

ts

au

B1

B2

B3

B4

12

34

56

7

B5

b

c

d em

p

p

n

b

g

h i

j k

f

db

hj

f

on

H2

H1 H1

B1

B2

B3

B4

B5

B6

B1

B2

B3

B4

B5

B6

12

34

56

78

12

34

56

78

ce

mg

ik

on

H2

rt

s

u

gi j

7 English

Ou

tdo

or

un

it m

ult

i co

nn

ecti

on

pip

ing

kit

an

dR

efri

ger

ant

bra

nch

kit

sel

ecti

on

Pip

e si

ze s

elec

tio

n

• Ref

riger

ant b

ranc

h kit

s ca

n on

ly be

use

d wi

th R

410A

.• W

hen

mul

ti ou

tdoo

r sys

tem

are

inst

alle

d, b

e su

re to

use

the

spec

ial s

epar

atel

y so

ld O

utdo

or u

nit m

ulti

conn

ectio

n pi

ping

kit

. (BH

FP26

A90

· 136

).(F

or h

ow to

sel

ect t

he p

rope

r kit,

follo

w th

e ta

ble

at ri

ght.)

• Nev

er u

se B

HFP2

6M90

· 13

5, B

HFP2

2M90

· 13

5P fo

r M

type

of t

his

serie

s or

T jo

int (

field

sup

plye

d).

How

to s

elec

t the

RE

FN

ET

join

t

Pip

ing

betw

een

outd

oor

unit

(*2)

and

ref

riger

ant b

ranc

h ki

t (pa

rt A

)

How

to s

elec

t the

RE

FN

ET

hea

der

Whe

n us

ing

RE

FN

ET

join

t at t

he fi

rst b

ranc

h co

unte

d fr

om th

e ou

tdoo

r un

it si

de,

choo

se fr

om th

e fo

llow

ing

tabl

e in

acc

orda

nce

with

the

outd

oor

unit

capa

city

type

.(E

xam

ple

: RE

FN

ET

join

t A)

Choo

se fr

om th

e fo

llowi

ng ta

ble

in a

ccor

danc

e wi

th th

e ou

tdoo

r uni

t sys

tem

cap

acity

type

.

Pip

ing

betw

een

outd

oor u

nit m

ulti

conn

ectio

n pi

ping

kit

and

outd

oor u

nit (

part

C)

Tem

per g

rade

and

wal

l thi

ckne

ss fo

r pip

es(T

empe

r gra

de, O

type

and

1/2

H ty

pe in

dica

te th

e m

ater

ial t

ype

spec

ified

in J

IS H

330

0.)

Cho

ose

from

the

follo

win

g ta

ble

in a

ccor

danc

e w

ith th

e ca

paci

ty ty

pe o

fth

e ou

tdoo

r un

it co

nnec

ted.

Pip

ing

betw

een

outd

oor

unit

mul

ti co

nnec

tion

pipi

ng k

its (

part

B)

Cho

ose

from

the

follo

win

g ta

ble

in a

ccor

danc

e w

ith th

e to

tal c

apac

ity o

f all

the

outd

oor

units

con

nect

ed u

pstr

eam

.

Cho

ose

from

the

follo

win

g ta

ble

in a

ccor

danc

e w

ith th

e to

tal c

apac

ity in

dex

of a

llth

e in

door

uni

ts c

onne

cted

bel

ow th

e R

EF

NE

T h

eade

r.In

door

uni

t of F

XY

~ P

280

· 450

· 56

0 ca

n no

t be

conn

ecte

d be

low

the

RE

FNE

T he

ader

.

How

to s

elec

t the

out

door

uni

t mul

ti co

nnec

tion

pipi

ng k

it(T

his

is r

equi

red

whe

n th

e sy

stem

is m

ulti

outd

oor

unit

syst

em.)

Cho

ose

from

the

follo

win

g ta

ble

in a

ccor

danc

e w

ith th

e nu

mbe

r of

out

door

uni

ts.

Cho

ose

the

REF

NET

join

ts o

ther

than

the

first

bra

nch

from

the

follo

win

g ta

ble

in a

ccor

danc

ew

ith th

e to

tal c

apac

ity in

dex

of a

ll th

e in

door

uni

ts c

onne

cted

bel

ow th

e R

EFN

ET jo

int.

Out

door

uni

t cap

acity

type

8,10

HP

type

12~

22H

P ty

pe24

HP

type

~

Indo

or u

nit t

otal

cap

acity

inde

x

x <

200

200

≤ x

< 2

9029

0 ≤

x <

640

640

≤ x

Ref

riger

ant b

ranc

h ki

t nam

eK

HR

P25

A33

TK

HR

P25

A72

T+

KH

RP

25M

72T

PK

HR

P25

A73

T+

KH

RP

25M

73T

P

3 pi

pes

KH

RP

25A

22T

KH

RP

25A

33T

KHRP

25A7

2T+K

HRP2

5M72

TPKH

RP25

A73T

+KHR

P25M

73TP

2 pi

pes

KH

RP

26A

22T

KH

RP

26A

33T

KH

RP

26A

72T

Ref

riger

ant b

ranc

h ki

t nam

e

Indo

or u

nit t

otal

cap

acity

inde

x

x <

200

200

≤ x

< 2

9029

0 ≤

x <

640

640

≤ x

Num

ber

of o

utdo

or u

nit

2 un

its3

units

Con

nect

ing

pipi

ng k

it na

me

BH

FP

26A

90B

HF

P26

A13

6

3 pi

pes

KH

RP

25M

33H

KHRP

25M7

2H+K

HRP2

5M72

HPKH

RP25

M73H

+KHR

P25M

73HP

2 pi

pes

KHRP

26M2

2H or

KHR

P26M

33H

KH

RP

26M

33H

KH

RP

26M

72H

KHRP

26M7

3H+K

HRP2

6M73

HP

Ref

riger

ant b

ranc

h ki

t nam

e

Exa

mpl

e fo

r in

door

uni

tsco

nnec

ted

dow

nstr

eam

Exa

mpl

e R

EF

NE

T jo

int C

: In

door

uni

ts 5

+ 6

+ 7

+ 8

Exa

mpl

e R

EF

NE

T jo

int B

: In

door

uni

ts 7

+ 8

Exam

ple

REF

NET

hea

der :

Indo

or u

nits

1 +

2 +

3 +

4 +

5 +

6E

xam

ple

RE

FN

ET

hea

der

:In

door

uni

ts 1

+ 2

+ 3

+ 4

+ 5

+ 6

+ 7

+ 8

The

thic

knes

s of

the

pipe

s in

the

tabl

e sh

ows

the

requ

irem

ents

of J

apan

ease

Hig

h P

ress

ure

Gas

Con

trol

l low

. (A

s of

Jan

. 200

3)T

he th

ickn

ess

and

mat

eria

l sha

ll be

sel

ecte

d in

ac

cord

ance

with

loca

l cod

e.

For

an

outd

oor

unit

inst

alla

tion,

mak

eth

e se

tting

s in

acc

orda

nce

with

the

follo

win

g fig

ure. O

utdo

or u

nit

Equ

aliz

er p

ipe

(par

t D)

Pip

ing

betw

een

outd

oor

unit

mul

ti co

nnec

tion

pipi

ng k

itan

d ou

tdoo

r un

it (p

art C

)P

ipin

g be

twee

n ou

tdoo

r un

it m

ulti

conn

ectio

n pi

ping

kits

(pa

rt B

)

Pip

ing

betw

een

outd

oor

unit

and

refr

iger

ant b

ranc

h ki

t (pa

rt A

)

Out

door

uni

tca

paci

ty ty

pe8H

P ty

pe10

HP

type

12H

P ty

pe14

,16H

P ty

pe18

HP

type

20,2

2HP

type

24H

P ty

pe26

~34H

P ty

pe36

HP

type

38~4

8HP

type

Pip

ing

size

(O

. D.)

Pip

ing

size

(O

. D.)

Suc

tion

gas

pipe

φ19.

1φ2

2.2

φ28.

6

φ34.

9

φ41.

3

HP

/LP

gas

pip

eφ1

5.9

φ19.

1

φ22.

2

φ28.

6

φ34.

9

Liqu

id p

ipe

φ9.5

φ12.

7

φ15.

9

φ19.

1

Out

door

uni

tca

paci

ty ty

pe8,

10H

P ty

pe12

HP

type

14,1

6HP

type

Cop

per t

ube

O. D

.Te

mpe

r gra

deW

all t

hick

ness

(Min

. req

uire

men

t)Suc

tion

gas

pipe

φ22.

2

φ28.

6

HP

/LP

gas

pip

e

φ19.

1

φ22.

2

Liqu

id p

ipe

φ9.5

× 0

.8

φ12.

7

φ 6.4

0.80

φ9.5

0.80

φ12.

7

0.80

φ15.

9

0.99

φ19.

1

0.80

φ22.

2

0.80

φ25.

4

0.88

φ28.

6

0.99

φ31.

8

1.10

φ34.

9

1.21

φ38.

1

1.32

φ41.

3

1.43

Pip

ing

betw

een

refr

iger

ant b

ranc

h ki

tsP

ipin

g be

twee

n re

frig

eran

t bra

nch

kit a

nd B

S u

nit

Pip

ing

betw

een

BS

uni

t and

ref

riger

ant b

ranc

h ki

t

Cho

ose

from

the

follo

win

g ta

ble

in a

ccor

danc

e w

ith th

e to

tal c

apac

ity ty

pe o

f all

the

indo

or u

nits

con

nect

ed d

owns

trea

m.

Pip

ing

betw

een

refr

iger

ant b

ranc

h ki

t, B

S u

nit a

nd in

door

uni

t

Equ

aliz

er p

ipe

(par

t D)

(out

door

mul

ti sy

stem

onl

y)

Mat

ch to

the

size

of t

he c

onne

ctio

n pi

ping

on

the

indo

or u

nit.

*1 C

onne

ctio

n pi

ping

mus

t not

exc

eed

the

refr

iger

ant P

ipin

g si

ze b

etw

een

outd

oor

u

nit a

nd r

efrig

eran

t bra

nch

kit (

part

A).

*2 W

hen

sele

ctin

g 2

pipe

s lin

e (g

as p

ipe

and

liqui

d pi

pe),

use

Suc

tion

gas

pipe

c

olum

n fo

r ga

s pi

pe a

nd L

iqui

d pi

pe c

olum

n fo

r liq

uid

pipe

.

Indo

or c

apac

ity in

dex

x <

150

150

≤ x

< 2

0020

0 ≤

x <

290

290

≤ x

< 4

2042

0 ≤

x <

640

640

≤ x

< 9

2092

0 ≤

x

Suc

tion

gas

pipe

φ15.

9φ1

9.1

φ22.

2

φ28.

6

φ34.

9φ4

1.3

HP

/LP

gas

pip

eφ1

2.7

φ15.

9

φ19.

1

φ28.

6

Liqu

id p

ipe

φ9.5

φ12.

7φ1

5.9

φ19.

1

Indo

or u

nit c

apac

ity ty

pe

20 ·

25 ·

32 ·

40 ·

50 ty

pe63

· 80

· 10

0 · 1

25 ty

pe20

0 ty

pe25

0 ty

pe

gas

pipe

φ12.

7φ1

5.9

φ19.

1φ2

2.2

Liqu

id p

ipe

φ6.4

φ9.5

Pip

ing

size

(O

. D.)

φ19.

1

(uni

t : m

m)

(uni

t : m

m)

Pip

ing

size

(O

. D.)

(uni

t : m

m)

Pip

ing

size

(O

. D.)

(uni

t : m

m)

(uni

t : m

m)

1/2H

type

O ty

pe

English 8

Req

uire

d C

ondi

tions

Exa

mpl

e D

raw

ings

1. It

is n

eces

sary

to in

crea

se th

e pi

pe s

ize

betw

een

the

first

bra

nch

kit

and

the

final

bra

nch

kit.

(Red

ucer

s m

ust b

e pr

ocur

ed o

n si

te)

How

ever

, the

pip

es th

at a

re s

ame

pipe

siz

e w

ith m

ain

pipe

mus

t not

be

incr

ease

d.

2. F

or c

alcu

latio

n of

Tot

al e

xten

sion

leng

th, t

he a

ctua

l leng

th o

f ab

ove

pipe

s m

ust b

e do

uble

d. (e

xcep

t mai

n pi

pe a

nd th

e pi

pes

that

are

not

incr

ease

d)

3. In

door

uni

t to

the

near

est b

ranc

h ki

t ≤ 4

0 m

4. T

he d

iffer

ence

bet

wee

n [O

utdo

or u

nit t

o th

e fa

rthe

st in

door

uni

t] an

d [O

utdo

or u

nit

to th

e ne

ares

t ind

oor

unit]

≤ 4

0 m

8

b+

c+

d+

e+

f+g

+p

≤ 9

0 m

in

crea

se th

e pi

pe s

ize

of b

, c, d

, e, f

, g

a+

b×

2+

c×

2+

d×

2+

e×

2+

f×2

+g

×2

+h

+i+

j+k

+l+

m+

n+

p≤

100

0 m

h, i,

j....

... p

≤ 4

0 m

The

fart

hest

indo

or u

nit

8

The

nea

rest

indo

or u

nit

1

(a+

b+

c+

d+

e+

f+g

+p

)-(a

+h

)≤ 4

0 m

Incr

ease

the

pipe

siz

e as

follo

ws

φ 9.

5 →

φ12

.7φ1

2.7

→ φ

15.9

φ15.

9 →

φ19

.1φ1

9.1

→ φ

22.2

φ22.

2 →

φ25

.4*

φ28.

6 →

φ31

.8*

φ34.

9 →

φ38

.1*

aA

BC

DE

FG

bc

de

fg

hi

jk

lm

n1

23

45

67

8

H1

p

Out

door

uni

tR

EF

NE

T jo

int (

A-G

)

Indo

or u

nits

( 1

- 8

)

*If a

vaila

ble

on th

e si

te, u

se th

is s

ize.

Oth

erw

ise

it ca

n no

t be

incr

ease

d.

Ho

w t

o c

alcu

late

th

ead

dit

ion

al r

efri

ger

ant

to b

e ch

arg

ed

Add

ition

al r

efrig

eran

t to

be c

harg

ed :

R(k

g) R

sho

uld

be r

ound

ed o

ff in

uni

ts o

f 0.1

kg.

R =

Tota

l leng

th(m

)of

liqui

d pi

ping

size

at φ2

2.2

Tota

l leng

th(m

)of

liqui

d pi

ping

size

at φ1

5.9)

Tota

l leng

th(m

)of

liqui

d pi

ping

size

at φ9

.5

Tota

l leng

th(m

)of

liqui

d pi

ping

size

at φ1

9.1)

Tota

l leng

th(m

)of

liqui

d pi

ping

size

at φ1

2.7

Tota

l leng

th(m

)of

liqui

d pi

ping

size

at φ6

.4

0.37 0.

18

0.05

9

0.26 0.

12

0.02

2

1.02

HEAT

REC

OVE

R SY

STEM

MO

DEL

NAM

ETH

E AM

OUNT

OF

REFR

IGER

ANT

REY

Q18

~ 2

0PY1

REY

Q22

~ 2

4PY1

REY

Q26

PY1

REY

Q28

~ 3

0PY1

REY

Q32

~ 4

0PY1

REY

Q42

PY1

REY

Q44

~ 4

6PY1

REY

Q48

PY1

1.0k

g1.

5kg

2.0k

g2.

5kg

3.0k

g3.

5kg

4.0k

g4.

5kg

RE

FRIG

ER

AN

T A

MO

UN

TFO

R E

XC

EE

DIN

G C

ON

NE

CTI

ON

CA

PA

CIT

Y O

F IN

DO

OR

UN

IT

IND

OO

RC

ON

NE

CTI

ON

CA

PA

CIT

Y

MO

RE T

HAN

100%

120%

OR

LESS

MO

RE T

HAN

120%

130%

OR

LESS

MO

DEL

NAM

ERE

YQ18

~

32PY

1

REYQ

34 ~

48

PY1

0.5k

g

0.5k

g1.

0kg

Exa

mpl

e fo

r re

frig

eran

t bra

nch

usin

g R

EF

NE

T jo

int a

nd R

EF

NE

T h

eade

r fo

r th

e sy

stem

s an

d ea

ch p

ipe

leng

th a

s sh

own

belo

w.

Out

door

sys

tem

: R

EY

Q34

PY

1T

otal

cap

acity

of i

ndoo

r un

it : 1

16%

R =

( 50

× 0

.26

+ 1

× 0

.18

+ 3

× 0

.12

+ 1

56 ×

0.0

59 +

20

× 0

.022

)×

1.02

+ 3

.0 +

0.5

a : φ

19.1

× 3

0mb

: φ19

.1 ×

20m

c : φ

9.5

× 1

0md

: φ9.

5 ×

10m

e : φ

9.5

× 1

0mf

: φ9.

5 ×

10m

g : φ

9.5

× 1

0mh

: φ9.

5 ×

10m

i : φ

9.5

× 1

0mj

: φ9.

5 ×

10m

k : φ

9.5

× 2

0ml

: φ9.

5 ×

20m

m :

φ9.5

× 2

0mn

: φ9

.5 ×

10m

o :

φ6.4

× 1

0mp

: φ6

.4 ×

10m

r : φ

12.7

× 3

ms

: φ9.

5 ×

3m

t : φ

9.5

× 3

mu

: φ15

.9 ×

1m

a, b

ur

c~n,

s, t

o, p

REYQ

34PY

111

6%

= 2

7.14

827

.1kg

Rou

nd o

ff in

uni

ts o

f 0.1

kg.

Not

e 1.

Whe

n th

e eq

uiva

lent

pip

e le

ngth

bet

wee

n ou

tdor

and

indo

or u

nits

is 9

0m o

r m

ore,

the

size

of m

ain

pipe

s on

the

liqui

d si

de (

refe

r to

figu

re 9

) m

ust b

e in

crea

sed

acco

rdin

g to

the

right

tabl

e.(N

ever

incr

ease

suc

tion

gas

pipe

and

HP

/LP

gas

pip

e.)

(Ref

er to

figu

re 9

)1.

Out

door

uni

t2.

Mai

n pi

pes

3.In

crea

se o

nly

liqui

d pi

pe s

ize

4.F

irst r

efrig

eran

t bra

nch

kit

5.B

S u

nit

6.In

door

uni

t

Not

e 2.

Allo

wab

le le

ngth

afte

r th

e fir

st r

efrig

eran

t bra

nch

kit t

o in

door

uni

ts is

40m

or

less

, how

ever

it c

an b

e ex

tend

ed u

p to

90m

if a

ll th

e fo

llow

ing

cond

ition

s ar

e sa

tisfie

d. (

In c

ase

of "

Bra

nch

wit

h R

EF

NE

T jo

int"

)

Syst

emR

EYQ

8 ~

10PY

1R

EYQ

12 ~

16P

Y1R

EYQ

18 ~

24P

Y1R

EYQ

26 ~

48P

Y1

Liqu

id p

ipe

φ9.5

→ φ

12.7

φ12.

7 →

φ15

.9φ1

5.9

→ φ

19.1

φ19.

1 →

φ22

.2

9 English

7. FIELD WIRING

Caution

• All field wiring and components must be installed by a licensed electrician and must comply with relevant local and national regulations.

• Be sure to use a dedicated power circuit. Never use a power sup-ply 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, light-ning 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 pip-ing 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.

Note• 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 wiring and transmission wiring.(If operated with thermistor, sensor or etc. removed, the compres-sor may be broken down.)

• This product have reversed phase protection detector that only works when the power is turned on. If there exists black out 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 termi-nal parts (terminal for power wiring, terminal for transmission wir-ing and earth terminal).

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-uct is operating, attach a reversed phase protection circuit locally.Running the product in reversed phase may break the compres-sor and other parts.

7-1 Power circuit, safety device and cable requirements

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

relevant local and national regulations.• Specifications for local wiring are in compliance with IEC60245.• Use wire type H05VV when protected pipes are used.

Use wire type H07RN-F when protected pipes are not used.

7-2 Wiring Connection Example for Whole System(Refer to figure 17)

1. Power supply2. Main switch3. Earth leakage circuit breaker4. Fuse5. Outdoor unit6. COOL/HEAT selector7. Remote controller8. Indoor unit9. 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 50 mm 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 Connec-tion Procedure”.

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

• Secure wiring with clamp such as insulation lock ties to avoid con-tact 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 bot-tom 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 18)1. Electrical wiring diagram2. On the back of the EL .COMPO. BOX lid.3. Power wiring, ground wiring (inside conduit)4. (When the wiring is routed out through the side panel.)5. Transmission wiring6. Pipe opening7. Conduit8. For power wiring and ground wiring9. Through cover

10. Cut off the shaded zones before use.11. Burr12. Knockout hole13. For transmission wiring

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

Phase andfrequency Voltage Minimum

circuit amp.Recom-

mended fuses

REYQ18PY1 φ 3, 50Hz 380-415V 40.1A 45A

REYQ20PY1 φ 3, 50Hz 380-415V 41.2A 50A

REYQ22PY1 φ 3, 50Hz 380-415V 44.3A 50A

REYQ24PY1 φ 3, 50Hz 380-415V 45.4A 50A

REYQ26PY1 φ 3, 50Hz 380-415V 53.1A 60A

REYQ28PY1 φ 3, 50Hz 380-415V 54.2A 60A

REYQ30PY1 φ 3, 50Hz 380-415V 63.0A 70A

REYQ32PY1 φ 3, 50Hz 380-415V 63.0A 70A

REYQ34PY1 φ 3, 50Hz 380-415V 71.6A 80A

REYQ36PY1 φ 3, 50Hz 380-415V 72.7A 80A

REYQ38PY1 φ 3, 50Hz 380-415V 75.8A 90A

REYQ40PY1 φ 3, 50Hz 380-415V 76.9A 90A

REYQ42PY1 φ 3, 50Hz 380-415V 84.6A 100A

REYQ44PY1 φ 3, 50Hz 380-415V 85.7A 100A

REYQ46PY1 φ 3, 50Hz 380-415V 94.5A 110A

REYQ48PY1 φ 3, 50Hz 380-415V 94.5A 110A

English 10

• After knocking out the holes, we recommend you remove any burrs and paint them using the repair paint to prevent rusting. (Refer to figure 18)

• When passing wiring through the knock holes, remove burrs around the knock holes and protect the wiring with protective tape. (Refer to figure 18)

• If small animals might enter the unit, block off any gaps (hatching parts in figure 18) with material (field supply).

7-4 Transmission Wiring Connection Procedure• Referring to figure 19 connect the transmission wiring between

outdoor unit and indoor unit, outdoor unit and outdoor unit of other system, outdoor unit and outdoor unit of same system.

(Refer to figure 19)1. Master unit (*)2. Sub unit (*)3. Outdoor unit A4. Outdoor unit B5. Outdoor unit C6. Never connect the power wire.7. To outdoor unit of other system8. Use duplex wires (No polarity)9. BS unit

10. Indoor unit11. Indoor unit (Cooling only)(*) : The Outdoor unit that connect the transmission wiring to BS

unit is Master unit of the multi system.And the other units are Sub unit. (In this figure, Outdoor unit A is the Master unit.)Check operation in installation work, Onsite settings and so on are done by operating the PC-bord (A1P) of Master unit.

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.

• All transmission wiring should use sheathed vinyl cord 0.75-1.25

mm2 or cable (duplex).

• Transmission wiring (About the symbol ~ , see figure 19) should be done within the following limitations.If they are exceeded, transmission problems may occur.

Between outdoor unit and BS (or indoor) unitBetween BS unit and indoor unitBetween outdoor unit and outdoor unit of other systems

Max. wiring length :1,000 mMax. total wiring length :2,000 mMax. no. of branches :16

[Note] No branch is allowed after branch (See figure 20)

Max. no. of outdoor units of other system that can be connected

: 10

(Refer to figure 20)1. Branch2. Branch after branch

Between outdoor unit and outdoor unit of same systemMax. wiring length : 30 m

• The transmission wiring inside the EL.COMPO.BOX should be secured using the clamp (1) as shown in figure 21.

(Refer to figure 21)1. In the EL.COMPO.BOX2. Retain to the EL.COMPO.BOX with the accessory clamp (1).

• Outside the units, the transmission wiring must be finished simul-taneously with the local refrigerant piping, and wound with tape (field supply) as shown in figure 22.

(Refer to figure 22)1. Suction gas pipe2. HP/LP gas pipe3. Liquid pipe4. Insulation material5. Finishing tape

6. Transmission wiring• Transmission wiring between outdoor units in the outdoor multi sys-

tem must be connected to terminals Q1 and Q2 (TO MULTI UNIT).Connecting the wires to the F1, F2 (TO OUT/D UNIT) terminals results in system malfunction.

• Wiring to other systems should be connected to terminals F1 and F2 (TO OUT/D UNIT) on the PC-board of the master unit. The out-door unit that connected transmission wiring to BS (or indoor) unit is the master unit. The others are sub unit.

7-5 Power Wiring Connection Procedure• Be sure to connect the power supply wiring to the power supply

terminal block and hold it in place using the included clamp as shown in the figure 23.

• 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 23)1. Power supply (3N~ 380-415V 50Hz)2. Earth leakage circuit breaker3. Branch switch, Overcurrent breaker4. Ground wire5. Attach insulation sleeves6. Power supply terminal block7. Ground terminal8. Clamp (1) (accessory)

Caution

• Be sure to use crimp-style terminal with insulating sleeves for connections. (See the figure below.)

• For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure being exerted on the ter-minal 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.

• 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.

• 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 simul-taneously to the resin hook using the included clamp (1).

Screw size Tightening torque (N · m)

M3.5 (A1P) 0.80 - 0.96

1 2

1

2

Screw size Tightening torque (N·m)

M8 Power terminal, ground terminal 5.5 ~7.3

Power wireCrimp-style terminal

Insulating sleeve

Crimp-style terminal

Cup washer

Cut out section

Terminal block

Crip style terminal Wire : narrow

Wire : thick

Resin hook

11 English

7-6 Procedure for Wiring Inside Units• Referring to figure 27, secure and wire the power and transmis-

sion 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 50 mm away from the power wiring.

• Make sure all wiring do not contact to the pipes (hatching parts in the figure 24).

(Refer to figure 24)1. Retain with accessory clamp (3).2. Electric conduit3. When routing out the power/ground wires from the left side.4. When routing out the transmission wiring from the open-

ing for piping.5. When routing out the power/ground wires from the front.6. Clear over 50 mm.7. When routing out the transmission wiring from the

knockout hole.8. Retain to the back of the column support with the acces-

sory clamp (2).9. When routing out the power/ground wires from the right side.

10. Power wiring11. Transmission wiring12. Ground wire13. 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 acces-

sory clamp (2).15. When wiring, exercise sufficient caution not to detach the

acoustic insulators from the compressor.

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

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

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.)

<Needed tools>

<The system for air tight test and vacuum drying>• Referring to figure 25, connect an nitrogen tank, refrigerant tank,

and a vacuum pump to the outdoor unit.The refrigerant tank and the charge hose connection to refrigerant charge port or the valve A in figure 25 are needed in “11. ADDI-TIONAL REFRIGERANT CHARGE AND CHECK OPERATION”.

(Refer to figure 25)1. Gauge manifold2. Nitrogen3. Measuring device4. R410A tank (with siphon)5. Vacuum pump6. Charge hose7. Equalizer pipe shutoff valve8. HP/LP gas pipe shutoff valve9. Suction gas pipe shutoff valve

10. Liquid pipe shutoff valve11. Refrigerant charge port12. Valve A

13. Valve B14. Valve C15. Outdoor unit16. To BS (or indoor) unit17. Shutoff valve18. Service port19. Field piping20. Gas flow

Note• The airtightness 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 outdoor 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 han-dling the shutoff valve.

• 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 4.0MPa (40bar) (do not pressurize more than 4.0MPa (40bar)). If the pres-sure 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.

<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–100.7kPa 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.

NoteIf 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.)(1) After performing the vacuum drying for two hours, pressurize to

0.05 MPa (i.e., vacuum breakdown) with nitrogen gas, then depressurize down to –100.7 kPa for an hour using the vacuum pump (vacuum drying).

(2) If the pressure does not reach –100.7 kPa even after depressur-izing for at least two hours, repeat the vacuum breakdown - vac-uum drying process.

After vacuum drying, maintain the vacuum for an hour and make sure the pressure does not rise by monitoring with a vacuum gauge.

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

piping, the equalizer pipe (between the outdoor units for the out-door multi system) 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 withstand-ing 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 tem-peratures of 120°C or more for the HP/LP gas piping, the equal-izer 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 : 30°C, humidity : 75% to 80% RH : min. thickness : 15mm.If the ambient temperature exceeds 30°C and the humidity 80% RH, then the min. thickness is 20mm.See the Engineering data book for detail.

Gauge manifoldCharge hose valve

• To prevent entry of any impurities and insure 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.

Vacuum pump

• The vacuum pump for vacuum drying should be able to lower the pressure to –100.7kPa (5 Torr –755mm Hg).

• Take care the pump oil never flow backward into the refrigerant pipe during the pump stops.

[R410A] Label

English 12

• 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 outdoor unit is located higher than the indoor unit, etc., this must be prevented by caulking the connec-tions, etc. (Refer to figure 26)

• The piping lead-out hole lid should be attached after opening a knock hole. (Refer to figure 27)

• If small animals and the like might enter the unit through the pip-ing 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 30)

(Refer to figure 26)1. Insulation material2. Caulking, etc.

(Refer to figure 27)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 27) and paint the edges and areas around the edges using the repair paint.

10. CHECKING OF DEVICE AND INSTAL-LATION CONDITIONS

Be sure to check the followings.For those doing electrical work1. 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 work1. Make sure piping size is correct.

See “6-1 Selection of piping material and Refrigerant branch-ing 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”.

11. ADDITIONAL REFRIGERANT CHARGE AND CHECK OPERATION

The outdoor 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.)

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

refrigerant 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 refrig-erant 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.

Tightening torqueThe 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>

(Refer to figure 28)1. Service port2. Cap3. Hex holes4. Shaft (valve body)5. Seal section

To open1. Remove the cap and turn the shaft counterclockwise with the

hexagon wrench (JISB4648).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 close1. Remove the cap and turn the shaft clockwise with the hexagon

wrench (JISB4648).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>

With siphon pipe

Other tanks

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.)

Stand the tank upside-down and charge.

8HP type 10HP type 12HP type 14HP type 16HP type

Liquid pipe shutoff valve

φ9.5

φ12.7The 12HP type corresponds to the 12.7-diameter onsite pip-ing using the accessory pipe.

Suction gas shutoff valve

φ25.4The 8 · 10HP type corresponds to the 22.2-diame-ter onsite piping using the accessory pipeThe 12-16 HP type corresponds to the 28.6-diam-eter onsite piping using the accessory pipe.

HP/LP gas shutoff valve

φ19.1The 14 · 16 HP type corresponds to the 22.2-diam-eter onsite piping using the accessory pipe.

Equalizer pipe shutoff valve

φ19.1

Shutoff valve size

Tightening torque N·m (Turn clockwise to close)

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

φ 9.5 5.4 - 6.6 Hexagonal wrench4 mm

13.5 - 16.5

11.5 - 13.9φ 12.7 8.1 - 9.9 18.0 - 22.0

φ 19.127.0 - 33.0

Hexagonal wrench8 mm

22.5 - 27.5φ 25.4

13 English

[How to Check How Many Units are Connected]It is possible to find out how many indoor or outdoor unit in the system are turned on by operating the push button on the PC-board (A1P) of out-door unit (In case of multi system master unit).Follow the procedure below to check how many indoor or outdoor units are turned on.

NotePress 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 outdoor 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 29)1. EL. COMPO. BOX2. Inspection door3. EL. COMPO. BOX lid4. LED (H1~8P)5. Push button(BS1~5)6. 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.

Caution

• Make sure to use the protect tool (protective groves and gog-gles) 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 outdoor unit stops operating, the fan may keep rotation for a while.

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

and outdoor units are turned on, H2P will be lit on and the com-pressor will not operate.Check the LED display indicate as shown [Display of normal sys-tem] in chapter 11-2-1.

• 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 refrigerant charging port.The tightening torque for the lid is 11.5 to 13.9 Nm.

• 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. Oth-erwise, 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 service modes.

11-2-1 Procedure of Adding Refrigerant charging1. Make sure the following works are complete in accordance with

the installation manual.Piping workWiring workAir tight testVacuum dryingInstallation work for BS, indoor unit

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

3. Open the valve B (See the figure 30. 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.

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

H1P H2P H3P H4P H5P H6P H7P

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

j h h h h h h

(2) Press the SET button (BS2) the number of times until the LED display matches that at right.

For checking the number of outdoor units : eight times

j h h i h h h

For checking the number of indoor units : five times

j h h h i h i

(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 h standing for “0”.

j ∗ ∗ ∗ ∗ ∗ ∗

j h j h j j h

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

Ex: For the LED display at right, this would be “0 1 0 1 1 0 ”, which would mean 22 units are connected.

Note: “000000” indicates 64 units.32 × 0 + 16 × 1 + 8 × 0 + 4 × 1 + 2 × 1 + 1 × 0 = 22 units

English 14

(Refer to figure 30)1. Measuring device2. R410A tank (with siphon)3. Charge hose4. Equalizer pipe shutoff valve5. HP/LP gas pipe shutoff valve6. Suction gas shutoff valve7. Liquid pipe shutoff valve8. Refrigerant charge port9. Valve A

10. Valve B11. Valve C12. Outdoor unit A13. Outdoorunit B14. Outdoor unit C15. To BS, indoor unit16. Field pipings17. Refrigerant flow18. Shutoff valve19. Service port

4. If the “additional charging amount” was charged fully, close the valve B and go to step 7.If the “additional charging amount” was not charged fully, close the valve B and go to step 5.

5. Perform the refrigerant charging operation following [Refrigerant charging operation procedure] as shown below, and charge the remaining refrigerant of the “additional charging amount”. For per-forming the refrigerant charging operation the push button on the PC-board (A1P) of outdoor unit (In case of multi system, master unit) are use. (See the figure 29) In addition, the refrigerant are charged from the refrigerant charge port via the valve A.(See the figure 31)For operating the push button and opening and closing the valve, follow the work procedure.

NoteThe refrigerant will be charged about 30kg in one hour at outdoor temp. 30°C DB (12kg at 0°C DB).If you need to speedup in case of multi system, connect the refriger-ant tanks to each outdoor unit as shown in the figure 31.

(Refer to figure 31)1. Measuring device2. R410A tank (with siphon)3. Charge hose4. Equalizer pipe shutoff valve5. HP/LP gas pipe shutoff valve6. Suction pipe shutoff valve7. Liquid pipe shutoff valve8. Refrigerant charge port9. Valve A

10. Valve B11. Valve C12. Outdoor unit A13. Outdoor unit B14. Outdoor unit C15. To BS, indoor unit16. Field pipings17. Refrigerant flow when charging18. Shutoff valve19. Service port20. The refrigerant will be charged about 30kg in one hour at

outdoor temp. 30°CDB (12kg at 0°CDB). (According to outdoor temp. or the refrigerant amount in the tank, the charging rate may speed up). If you need to speed up in case of multi system, connect the refrigerant tanks to each outdoor unit.

[Refrigerant Charging Operation Procedure](1) Open the liquid pipe, suction gas pipe, HP/LP gas pipe and equal-

izer pipe shutoff valves (The valve A~C must be closed. The valve A~C means the valves in the figure 31.)

(2) • Close the EL. COMPO. BOX lid and all front panel except on the side of the EL. COMPO. BOX (*1) and turn the power to the outdoor unit and all connected indoor units. (*2)

• After H2P stop blinking (about 12 minutes after turning on the power), check LED displays as shown in Table : Display of nor-mal system and the system is normal state.If H2P is blinking, check the malfunction code in the remote controller, and correct the malfunction in accordance with [Remote controller display malfunction code] in chapter 11-2-2.

(*1) Lead the refrigerant charge hose etc from the pipe intake. All front panels must be closed at the procedure (3).

(*2) • If you perform the refrigerant charging operation within the refrigerant system that have the power off unit, the operation cannot finish properly.For confirming the number of the outdoor and indoor units with the power on, see [How to check how many units are con-nected] in chapter 11-1. In case of a multi system, turn on the power to all outdoor units in the refrigerant system.

• To energize the crankcase heater, make sure to turn on for 6 hours before starting operation.

Table : Display of normal system

LED display: h...OFF, i...ON, j...Blinking(*) How to distinguish the master unit, sub unit 1, and sub unit 2 in the multi system.

(3) Charge the remained refrigerant by additional refrigerant charg-ing operation of service mode.About the method of additional refrigerant charging operation, refer to the [Service Precaution] labe (lower) attached on the EL. COMPO. BOX lid of the outdoor unit.

(Refer to figure 32)1. EL. COMPO.BOX lid2. Inspection door3. [Service Precaution] label (upper)4. [Service Precaution] label (lower)

(4) Close the valve A if the “additional charging amount” of refrigerant was charged, and push the RETURN button (BS3) once.

6. After completing the additional refrigerant charging, record the charging amount on the accessory “REQUEST FOR THE INDI-CATON” label (Installation records) and adhere it to the back side of the front panel. Also, record the factory charged refrigerant amount, additional refrigerant amount in the field and total refrig-erant amount of the system to “ADDITIONAL REF. CHARGE” label and adhere in the proximity of the refrigerant charge port.About “ADDITIONAL REF. CHARGE” label, refer to [Important information regarding the refrigerant used] in “1-2 Special notice of product”.

11-2-2 Procedure of check operation• Check operation perform the following work. Do the check opera-

tion 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 openingCheck of miswiringJudgment of piping lengthCheck of refrigerant overcharge

Note• Check operation can not carried out at outdoor temp. less than -5°C.

Perform the check operation at day or time that outdoor temp. is -5°C 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 out-door 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 outdoor unit PC-board (A1P) with the power on. (See “12 Onsite Settings”)

LED display(Default status of shipped)

SERV. MONI-TOR

MODETEST/HWL

C/H SELECTORL.N.O.P

DEMA-ND

MULTIIND MASTER SLAVE

HAP H1P H2P H3P H4P H5P H6P H7P H8P

Single system j h h i h h h h h

Multi system

(*)

Master unit j h h i h h h h i

Sub unit 1 j h h h h h h h j

Sub unit 2 j h h h h h h h h

Method 1 : By the H8P (MULTI) LED display

i (ON) : Master unit j (Blinking) : Sub unit 1 h (OFF) : Sub unit 2

Method 2 : By the transmission wiring to indoor unitTransmission wiring is connected : Master unitTransmission wiring is not connected : Sub unit 1 or Sub unit 2

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(3) Perform the check operation following the Check Operation Method of the [Service Precautions] label (lower) on the EL. COMPO. BOX lid. 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.

NoteFor interrupting the check operation, push RETURN button (BS3).[Remote controller displays malfunction code]

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

12. ONSITE SETTINGSNoteIn the case of a multi system, all onsite settings should be made on the master unit. Settings made on sub units are invalid.The outdoor unit to which the indoor unit transmission wire are con-nected is the master unit, and all other units are sub units.

Use the push button switches (BS1 through BS5) on the outdoor 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 but-ton 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 workWiring workAir tight testVacuum drying

Additional refrigerant chargeCheck operation

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

13-2 Test RunAfter all works are completed, operate the unit normally and check the following.(1) Make sure the indoor and outdoor units are operating normally.(2) Operate each indoor unit one by one and make sure the corre-

sponding outdoor 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 control-

ler to see if they operate properly.

Note• Heating is not possible if the outdoor temperature is 24°C 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 outdoor units may continue operating for further 5 minutes at maximum.

• The outdoor 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.

• If the check operation was not performed at first istallation, the malfunction 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 RunPerform the following checks after the test run is complete.• Record the contents of field setting.

→ Record them on the accessory “REQUEST FOR THE INDI-CATION” 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.

NoteAfter 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)IntroductionThe 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-combusti-ble 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 levelThe maximum charge of refrigerant and the calculation of the maxi-mum 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 kg/m3 ( the weight in kg of the refrigerant gas in 1m3 volume of the occupied space).Compliance to the local applicable regulations and standards for the maximum allowable concentration level is required.In Australia the maximum allowed concentration level of refrigerant to

a humanly space is limited to 0.35kg/m3 for R407C and 0.44kg/m3 for R410A.

Malfunc-tion code Installation error Remedial action

E3, E4F3, F6UF

The shutoff valve of the out-door unit is left closed. Open the shutoff valve.

U1 The phases of the power to the outdoor unit is reversed.

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

U1U4LC

No power is supplied to an out-door, BS or indoor unit (includ-ing phase interruption).

Make sure the power source wire is prop-erly connected to the outdoor, BS or indoor unit and revise if necessary.

UFThere is conflict on the con-nection of transmission wiring in the system.

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

E3F6UF

Refrigerant overcharge.

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

E4F3 Insufficient refrigerant.

• Check if the additional refrigerant charge has been finished correctly.

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

U7, U4UF, UH

Field wiring is connected to "TO MULTI UNIT (Q1,Q2)" ter-minal on the outdoor unit PC-board (A1P) when the system is one outdoor system.

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

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1. direction of the refrigerant flow2. 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.Procedure for checking maximum concentrationCheck 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 (kg) charged to each system

separately.

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

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

2. Calculate the smallest room volume (m3 )Incase like the following, calculate the volume of (A), (B) as a sin-gle room or as the smallest room.

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. opening between rooms2. partition

(Where there is an opening without a door or where there are open-ings above and below the door which are each equivalent in size to 0.15% or more of the floor area.)3. Calculating the refrigerant density using the results of the calcu-

lations in steps 1 and 2 above.

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

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

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

+additional charging amount (amount of refrigerant added locally in accordance with the length or diameter of the refrig-erant piping)

=total amount of refriger-ant (kg) in the system

total volume of refrigerant in the refrigerant system ≤ maximum concen-

tration level (kg/m3)size (m3 ) of smallest room in which there is an indoor unit installed

2

1

1

2

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3P201178-5 EM06A072 (0702) FS