Daikin RXYQ-PYLK Installation manuals

INSTALLATION MANUAL

System air conditioner

RXYQ8P7Y1K

RXYQ10P7Y1K

RXYQ12P7Y1K

RXYQ8P7YLK

RXYQ10P7YLK

RXYQ12P7YLK

1	1		2
	B		B
b			b
A a	c C A a	e	e	c C
d			d
	D		D

	A+B+C+D		A+B
1	a ≥10 mm	a ≥50 mm	a ≥200 mm
	b ≥300 mm	b ≥100 mm	b ≥300 mm
	c ≥10 mm	c ≥50 mm
	d ≥500 mm	d ≥500 mm
2	a ≥10 mm	a ≥50 mm	a ≥200 mm
	b ≥300 mm	b ≥100 mm	b ≥300 mm
	c ≥10 mm	c ≥50 mm
	d ≥500 mm	d ≥500 mm
	e ≥20 mm	e ≥100 mm	e ≥400 mm
3	a ≥10 mm	a ≥50 mm
	b ≥300 mm	b ≥100 mm
	c ≥10 mm	c ≥50 mm	h2
	d ≥500 mm	d ≥500 mm
	e ≥20 mm	e ≥100 mm
	f ≥600 mm	f ≥500 mm	<![if ! IE]> <![endif]>1500
4	a ≥10 mm	a ≥50 mm
	b ≥300 mm	b ≥100 mm
	c ≥10 mm	c ≥50 mm
	d ≥500 mm	d ≥500 mm
	e ≥20 mm	e ≥100 mm
1
34		3
5			5
1		5	1
		2
4

8

		RXYQ8~12
	A		B
		2		3
	1	3	1	2
				8
	8	8	8	7
	4	6	5	8
				11
				10
			9	8
				8 9
		RXYQ16~32
	A		B
		2		3
	1	3	1	2
				8
	8	8	8	7
	4	6	5	8

8

10

1

2

4

5

6

3 7

10

		3		2
									6	3
		B
										2
		b
				2
	A a	e	c C
				3					4
		f
				1500	<![if ! IE]> <![endif]>1000		1000		5
					<![if ! IE]> <![endif]>≥	≥		1000
				≥				≥	≥1500
		d							≥1500
									≥1500
		D		1
		4									(mm)
		B
		b	2
	A a	e	c C
		d							A
			3
									B
		b
		D					<![if ! IE]> <![endif]>67 67		<![if ! IE]> <![endif]>67≥ ≥67	<![if ! IE]> <![endif]>722-737
	h1										<![if ! IE]> <![endif]>765
	<![if ! IE]> <![endif]>500
			3
			5
	3		5
	5		3
		1
2	4
			5
	6		7
	3	2
	2
		4
		1
		4									≥100
		1					≥
								100
	6		7
				9					A	B	C
	11
										1
										3
											2
	<![if ! IE]> <![endif]>A	1
		2
			1		9
		<![if ! IE]> <![endif]>A	<![if ! IE]> <![endif]>D	12
			<![if ! IE]> <![endif]>C						1		2
			3
	<![if ! IE]> <![endif]>90	<![if ! IE]> <![endif]>B									3
									4		4
	<![if ! IE]> <![endif]>150	<![if ! IE]> <![endif]>25	4						5		5
									6
									6
	11				12

13

17

14

1 2

	±	1
	°
A	3
	0

B	1

										5		4		3
13									14
									16
									1	1		1
15									A	B			8	4
1				4									2
														5
B 2													2
														7
													2
														6
								5				2
														7
							3
	2	3				6		6					2
1	B											2		3
15									16
					1	19
18						1
								A1P
							A B C F1 F2 F1 F2 Q1 Q2			A B C F1 F2 F1 F2 Q1 Q2
							A B C
7	8									C/H SELECTOR		TO IN/D UNIT TO OUT/D UNIT		TO MULTI UNIT
						1	3	7				2	6
							4	F1	F2	F1	F2	F1	F2
						2	5
								F1	F2	F1	F2	F1	F2
6						3
5						4
18							19
		21	3	2	5	4
		1

		22
		1
			L1	L2 L3	N	5
		2				6
21		3	8			7
		4
24			9
						10
						11
	5	22
	3	25
	4
		RXYQ8		RXYQ10~12
	1
2	6
2	6
		1	2		1	2
24		25

max 15° A

1

B

1

>120mm
>500	mm

17

20

1

2

3

A1P

A

B

C

F1

F2

F1

F2

Q1

Q2

Q1

Q2

Q1

Q2

7

5

6

4

4

20

23

		O
		U
TO IN/D		T
		ON
UNIT					DS1
		OFF
F1	F2
		1	2	3	4
		I
		N

F1 F2

P1 P2

P1 P2

1

23

26

O

U

T

		ON			DS1
	A B C	OFF
		1	2	3	4

I

N

A B C

1

26

RXYQ8P7Y1K RXYQ8P7YLK RXYQ10P7Y1K RXYQ10P7YLK RXYQ12P7Y1K RXYQ12P7YLK

VRVIII System air conditioner

Installation manual

CONTENTS		Page
1.	Introduction................................................................................	1
	1.1. Combination .................................................................................	1
	1.2. Standard supplied accessories ....................................................	2
	1.3. Optional accessories....................................................................	2
	1.4. Technical and Electrical specifications .........................................	2
2.	Main components ......................................................................	2
3.	Selection of location ..................................................................	3
4.	Inspecting and handling the unit................................................	4
5.	Unpacking and placing the unit .................................................	4
6.	Refrigerant piping ......................................................................	4
	6.1. Installation tools ...........................................................................	5
	6.2. Selection of piping material ..........................................................	5
	6.3. Pipe connection............................................................................	5
	6.4. Connecting the refrigerant piping .................................................	5
	6.5. Protection against contamination when installing pipes...............	7
	6.6. Example of connection.................................................................	8
7.	Leak test and vacuum drying ..................................................	10
8.	Field wiring ..............................................................................	10
	8.1. Internal wiring – Parts table........................................................	11
	8.2. Optional parts cool/heat selector................................................	11
	8.3. Power circuit and cable requirements ........................................	12
	8.4. General cautions ........................................................................	12
	8.5. System examples .......................................................................	13
	8.6. Leading power line and transmission line ..................................	13
	8.7. Field line connection: transmission wiring and
	cool/heat selection .....................................................................	13
	8.8. Field line connection: power wiring ............................................	15
	8.9. Wiring example for wiring inside unit..........................................	15

The refrigerant charge of the system must be less than 100 kg. This means that in case the calculated refrigerant charge is equal to or more than 95 kg you must divide your multiple outdoor system into smaller independent systems, each containing less than 95 kg refrigerant charge.

For factory charge, refer to the unit name plate.

The refrigerant R410A requires strict cautions for keeping the system clean, dry and tight.

■Clean and dry

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

■Tight

R410A does not contain any chlorine, does not destroy the ozone layer, and does not reduce the earth's protection against harmful ultraviolet radiation. R410A can contribute slightly to the greenhouse effect if it is released. Therefore we should take special attention to check the tightness of the installation.

Read "6. Refrigerant piping" on page 4 carefully and follow these procedures correctly.

9.	Pipe insulation .........................................................................	16
10.	Checking of unit and installation conditions ............................	16
11.	Charging refrigerant ................................................................	16
	11.1. Precautions when adding R410A...............................................	16
	11.2. Stop valve operation procedure .................................................	17
	11.3. How to check how many units are connected ............................	17
	11.4. Additional refrigerant charge ......................................................	18
	11.6. Checks after adding refrigerant ..................................................	23
12.	Before operation ......................................................................	24
	12.1. Service precautions....................................................................	24
	12.2. Checks before initial start-up......................................................	24
	12.3. Field setting................................................................................	24
	12.4. Test operation.............................................................................	26
13.	Service mode operation ..........................................................	28
14.	Caution for refrigerant leaks ....................................................	29
15.	Disposal requirements.............................................................	29

READ THIS MANUAL ATTENTIVELY BEFORE STARTING UP THE UNIT. DO NOT THROW IT AWAY. KEEP IT IN YOUR FILES FOR FUTURE REFERENCE.

IMPROPER INSTALLATION OR ATTACHMENT OF EQUIPMENT OR ACCESSORIES COULD RESULT IN ELECTRIC SHOCK, SHORT-CIRCUIT, LEAKS, FIRE OR OTHER DAMAGE TO THE EQUIPMENT. BE SURE ONLY TO USE ACCESSORIES MADE BY DAIKIN WHICH ARE SPECIFICALLY DESIGNED FOR USE WITH THE EQUIPMENT AND HAVE THEM INSTALLED BY A PROFESSIONAL.

DAIKIN EQUIPMENT IS DESIGNED FOR COMFORT APPLICATIONS. FOR USE IN OTHER APPLICATIONS, PLEASE CONTACT YOUR LOCAL DAIKIN DEALER.

IF UNSURE OF INSTALLATION PROCEDURES OR USE, ALWAYS CONTACT YOUR DEALER FOR ADVICE AND INFORMATION.

THIS AIR CONDITIONER COMES UNDER THE TERM "APPLIANCES NOT ACCESSIBLE TO THE GENERAL PUBLIC".

Since design pressure is 4.0 MPa or 40 bar (for R407C units: 3.3 MPa or 33 bar), pipes of larger wall thickness may be required. The wall thickness of piping must be carefully selected, refer to paragraph "6.2. Selection of piping material" on page 5 for more details.

1.INTRODUCTION

This installation manual concerns VRV inverters of the Daikin RXYQ-P7 series. These units are designed for outdoor installation and used for cooling and heat pump applications. The RXYQ-P7 series can be combined from 3 main units and has nominal cooling capacities ranging from 17.7 to 81.6 kW and nominal heating capacities ranging from 25.0 to 112.5 kW.

The RXYQ-P7 units can be combined with Daikin VRV indoor units for air conditioning purposes, and suitable for R410A.

The present installation manual describes the procedures for unpacking, installing and connecting the RXYQ-P7 units. Installation of the indoor units is not described in this manual. Always refer to the installation manual supplied with these units for their installation.

1.1.Combination

The indoor units can be installed in the following range.

■Always use appropriate indoor units compatible with R410A.

To learn which models of indoor units are compatible with R410A, refer to the product catalogs.

■Pay attention when connecting outdoor units in multi combination. RXYQ-M units are NOT compatible with RXYQ-P units.

■RXYQ_Y1K units are NOT compatible with RXYQ_YLK units.

Installation manual	RXYQ8~12P7Y1K + RXYQ8~12P7YLK
1	VRVIII System air conditioner
	4PW41760-1

■Total capacity/quantity of indoor units

							Total	Total
							capacity of	quantity of
Standard combination of outdoor units							indoor units	indoor units
RXYQ8	(a)						100~260	13
RXYQ10	(a)						125~325	16
RXYQ12	(a)						150~390	19
RXYQ16	=	RXYQ8	+	RXYQ8			200~520	26
RXYQ18	=	RXYQ8	+	RXYQ10			225~585	29
RXYQ20	=	RXYQ10	+	RXYQ10			250~650	32
RXYQ22	=	RXYQ10	+	RXYQ12			275~715	35
RXYQ24	=	RXYQ12	+	RXYQ12			300~780	39
RXYQ26	=	RXYQ8	+	RXYQ8	+	RXYQ10	325~845	42
RXYQ28	=	RXYQ8	+	RXYQ10	+	RXYQ10	350~910	45
RXYQ30	=	RXYQ8	+	RXYQ10	+	RXYQ12	375~975	48
RXYQ32	=	RXYQ10	+	RXYQ10	+	RXYQ12	400~1040	52
RXYQ34	=	RXYQ10	+	RXYQ12	+	RXYQ12	425~1105	55
RXYQ36	=	RXYQ12	+	RXYQ12	+	RXYQ12	450~1170	58

(a) Main unit

NOTE	■ The table above shows the possible total capacity
	and number of possible indoor units when
	configured in a standard combination.

■If the total capacity of the connected indoor units exceeds the capacity of the outdoor unit, cooling and heating performance may drop when running the indoor units.

Refer to the section on performance characteristics in the Engineering Data Book for details.

■There are restrictions on the refrigerant pipe connection order between outdoor units during installation in case of a multiple outdoor unit system.

Install according to the following restrictions.

The capacities of outdoor units A, B, and C must fulfill the following restriction conditions: A≥B≥C.

A B C

1 2

3

1To indoor units

2Outdoor unit multi connection piping kit (first branch)

3Outdoor unit multi connection piping kit (second branch)

1.2.Standard supplied accessories

See location 1 in figure 25 for reference to where following accessories are supplied with the unit.

Installation manual	1
Operation manual	1
Request for indication of additional
refrigerant charging and leak detection	1
amount label

See location 2 in figure 25 for reference to where following accessories are supplied with the unit.

Gas side accessory pipe

Unit type

Item

Quantity

8~12 Hp

1

8~12 Hp

1

Liquid side accessory pipe

Unit type

Item

Quantity

8~12 Hp

1

8~10 Hp

1

12 Hp

1

1.3.Optional accessories

To install the above outdoor units, the following optional parts are also required.

■Refrigerant branching kit (for R410A only: Always use an appropriate kit dedicated for your system.)

Refnet header		Refnet joint
KHRQ22M29H		KHRQ22M20T
KHRQ22M64H		KHRQ22M29T9
KHRQ22M75H		KHRQ22M64T
		KHRQ22M75T

■Outdoor unit multi connection piping kit (For R410A only: Always use an appropriate kit dedicated for your system.)

Number of outdoor units connected

2	3
BHFQ22P1007	BHFQ22P1517

■Pipe size reducer (For R410A only: Always use an appropriate kit dedicated for your system.)

RXYQ24~36

KHRQ22M75T	KHRQ22M75H

To select an optimum refrigerant branching kit, refer to "6. Refrigerant piping" on page 4.

1.4.Technical and Electrical specifications

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

2.MAIN COMPONENTS

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

RXYQ8~12P7Y1K + RXYQ8~12P7YLK	Installation manual
VRVIII System air conditioner	2
4PW41760-1

3.SELECTION OF LOCATION

This unit, both indoor and outdoor, is suitable for installation in a commercial and light industrial environment. If installed as a household appliance it could cause electromagnetic interference, in which case the user may be required to take adequate measures.

■Make sure to provide for adequate measures in order

to prevent that the outdoor unit be used as a shelter by small animals.

■Small animals making contact with electrical parts can cause malfunctions, smoke or fire. Please instruct the customer to keep the area around the unit clean.

Obtain the customer's permission before installing.

The inverter units should be installed in a location that meets the following requirements:

1The foundation is strong enough to support the weight of the unit and the floor is flat to prevent vibration and noise generation.

If not, the unit may fall over and cause damage or injury.

2The space around the unit is adequate for servicing and the minimum space for air inlet and air outlet is available. (Refer to figure 1 and choose one of the possibilities).

A B C D Sides along the installation site with obstacles

Suction side

■In case of an installation site where sides A+B+C+D have obstacles, the wall heights of sides A+C have no impact on service space dimensions. Refer to figure 1 for impact of wall heights of sides B+D on service space dimensions.

■In case of an installation site where only the sides A+B have obstacles, the wall heights have no influence on any indicated service space dimensions.

NOTE	The service space dimensions in figure 1 are
	based on cooling operation at 35°C.

3Make sure that there is no danger of fire due to leakage of inflammable gas.

4Ensure that water can not cause any damage to the location in case it drips out the unit (e.g. in case of a blocked drain pipe).

5The piping length between the outdoor unit and the indoor unit

may not exceed the allowable piping length. (Refer to "6.6. Example of connection" on page 8)

6Select the location of the unit in such a way that neither the discharged air nor the sound generated by the unit disturbs anyone.

7Make sure that the air inlet and outlet of the unit are not positioned towards the main wind direction. Frontal wind will disturb the operation of the unit. If necessary, use a windscreen to block the wind.

8Do not install or operate the unit on locations where air contains high levels of salt, like e.g. in the vicinity of oceans. (Refer for further information to the engineering databook).

9During installation, avoid the possibility that anybody can climb on the unit or place objects on the unit.

Falls may result in injury.

10When installing the unit in a small room, take measures in order to keep the refrigerant concentration from exceeding allowable safety limits in the event of a refrigerant leak.

Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency.

■The equipment described in this manual may cause electronic noise generated from radio-frequency energy. The equipment complies to specifications that are designed to provide reasonable protection against such interference. However, there is no guarantee that interference will not occur in a particular installation.

It is therefore recommended to install the equipment and electric wires keeping proper distances away from stereo equipment, personal computers, etc...

(See figure 2).

1Personal computer or radio

2Fuse

3Earth leakage breaker

4Remote controller

5Cool/heat selector

6Indoor unit

In places with weak reception, keep distances of 3 m or more to avoid electromagnetic disturbance of other equipment and use conduit tubes for power and transmission lines.

■In heavy snowfall areas, select an installation site where snow will not affect the operation of the unit.

■The refrigerant R410A itself is nontoxic, nonflammable and is safe. If the refrigerant should leak however, its concentration may exceed the allowable limit

depending on room size. Due to this, it could be necessary to take measures against leakage. Refer to the chapter "14. Caution for refrigerant leaks" on page 29.

■Do not install in the following locations.

•Locations where sulfurous acids and other corrosive gases may be present in the atmosphere. Copper piping and soldered joints may corrode, causing refrigerant to leak.

•Locations where a mineral oil mist, spray or vapour may be present in the atmosphere.

Plastic parts may deteriorate and fall off or causing water leakage.

•Locations where equipment that produces electromagnetic waves is found.

The electromagnetic waves may cause the control system to malfunction, preventing normal operation.

•Locations where flammable gases may leak, where thinner, gasoline, and other volatile substances are handled, or where carbon dust and other incendiary substances are found in the atmosphere.

Leaked gas may accumulate around the unit, causing an explosion.

■When installing, take strong winds, typhoons or earthquakes into account.

Improper installation may result in fall over of the unit.

Installation manual	RXYQ8~12P7Y1K + RXYQ8~12P7YLK
3	VRVIII System air conditioner
	4PW41760-1

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.

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

3Bring the unit as close as possible to its final installation position in its original package to prevent damage during transport. (See figure 4)

1Packaging material

2Opening (large)

3Belt sling

4Opening (small) (40x45)

5Protector

4Lift the unit preferably with a crane and 2 belts of at least 8 m long. (See figure 4)

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

NOTE	Use a belt sling of ≤20 mm wide that adequately
	bears the weight of the unit.

5If a forklift is to be used, preferably transport the unit with pallet first, then pass the forklift arms through the large rectangular openings on the bottom of the unit. (See figure 5)

5.1From the moment you use a forklift to move the unit to its final position, lift the unit under the pallet.

5.2Once at final position, unpack the unit and pass the forklift arms through the large rectangular openings on the bottom of the unit.

NOTE	Use filler cloth on the forklift arms to prevent
	damaging the unit. If the paint on the bottom
	frame peels off, the anti corrosion effect may
	decrease.

5.UNPACKING AND PLACING THE UNIT

■Remove the four screws fixing the unit to the pallet.

■Make sure the unit is installed level on a sufficiently strong base to prevent vibration and noise.

Do not use stands to only support the corners. (See figure 7)

X Not allowed

O Allowed (units: mm)

■ Make sure the base under the unit is larger than the 765 mm of the unit depth. (See figure 3)

■ The height of the foundation must at least be 150 mm from the floor.

■ The unit must be installed on a solid longitudinal foundation (steelbeam frame or concrete) as indicated in figure 3.

Model	A	B
RXYQ8	930	792
RXYQ10+12	1240	1102

■ Support the unit with a foundation of 67 mm wide or more. (The support leg of the unit is 67 mm wide, see figure 3).

■ Fasten the unit in place using four foundation	<![if ! IE]> <![endif]>mm
bolts M12. It is best to screw in the foundation
bolts until their length remains 20 mm above	<![if ! IE]> <![endif]>20
the foundation surface.

■Prepare a water drainage channel around the foundation to drain waste water from around the unit.

■If the unit is to be installed on a roof, check the strength of the roof and its drainage facilities first.

■If the unit is to be installed on a frame, install the waterproofing board within a distance of 150 mm under the unit in order to prevent infiltration of water coming from under the unit.

■When installed in a corrosive environment, use a nut with

plastic washer (1) to protect the		1
nut tightening part from rust.

Method for removing transportation stays

(only for RXYQ10 and RXYQ12 units)

The 4 yellow transportation stays installed over the compressor legs for protecting the unit during transport must be removed. Proceed as shown in figure 9 and described below.

ACompressor

BFixing nut

CTransportation stay

1Slightly loosen the fixing nut (B).

2Remove the transportation stay (C) as shown in figure 9.

3Tighten the fixing nut (B) again.

CAUTION

If the unit is operated with the transportation stay attached, abnormal vibration or noise may be generated.

6.REFRIGERANT PIPING

Do not insert fingers, rods or other objects into the air inlet or outlet. When the fan is rotating at high speed, it will cause injury.

Use R410A to add refrigerant.

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

Caution to be taken when brazing refrigerant piping

Do not use flux when brazing copper-to-copper refrigerant piping. (Particularly for the HFC refrigerant piping) Therefore, use the phosphor copper brazing filler metal (BCuP) which does not require flux.

Flux has extremely harmful influence on refrigerant piping systems. For instance, if the chlorine based flux is used, it will cause pipe corrosion or, in particular, if the flux contains fluorine, it will damage the refrigerant oil.

Be sure to perform a nitrogen blow when brazing. Brazing without performing nitrogen replacement or releasing nitrogen into the piping will create large quantities of oxidized film on the inside of the pipes, adversely affecting valves and compressors in the refrigerating system and preventing normal operation.

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

Toxic gas may be produced if the refrigerant gas leaks into the room and comes in contact with a source of fire.

Ventilate the area immediately in the event of a leak.

In the event of a leak, do not touch the leaked refrigerant directly. Frostbite may be caused.

RXYQ8~12P7Y1K + RXYQ8~12P7YLK	Installation manual
VRVIII System air conditioner	4
4PW41760-1

6.1.Installation tools

Make sure to use installation tools (gauge manifold charge hose, etc.) that are exclusively used for R410A installations to withstand the pressure and to prevent foreign materials (e.g. mineral oils such as SUNISO and moisture) from mixing into the system.

(The screw specifications differ for R410A and R407C.)

Use a 2-stage vacuum pump with a non-return valve which can evacuate to –100.7 kPa (5 Torr, –755 mm Hg).

NOTE	Make sure the pump oil does not flow oppositely into
	the system while the pump is not working.

6.2.Selection of piping material

1.Foreign materials inside pipes (including oils for fabrication) must be 30 mg/10 m or less.

2.Use the following material specification for refrigerant piping:

■ Size: determine the proper size referring to chapter "6.6. Example of connection" on page 8.

■ Construction material: phosphoric acid deoxidized seamless copper for refrigerant.

■ Temper grade: use piping with temper grade in function of the pipe diameter as listed in the table below.

Pipe Ø	Temper grade of piping material
≤15.9	O
≥19.1	1/2H

O = Annealed 1/2H = Half hard

■ The pipe thickness of the refrigerant piping should comply with relevant local and national regulations. The minimal pipe thickness for R410A piping must be in accordance with the table below.

	Minimal thickness			Minimal thickness
Pipe Ø	t (mm)		Pipe Ø	t (mm)
6.4	0.80		22.2	0.80
9.5	0.80		28.6	0.99
12.7	0.80		34.9	1.21
15.9	0.99		41.3	1.43
19.1	0.80

3.Make sure to use the particular branches of piping that have been selected referring to chapter "6.6. Example of connection" on page 8.

4.In case the required pipe sizes (inch sizes) are not available, it is also allowed to use other diameters (mm sizes), taken the following into account:

■select the pipe size nearest to the required size.

■use the suitable adapters for the change-over from inch to mm pipes (field supply).

5.Precautions when selecting branch piping

When the equivalent pipe length between outdoor and indoor units is 90 m or more, the size of the main pipes (both gas side and liquid side) must be increased.

Depending on the length of the piping, the capacity may drop, but even in such a case it is possible to increase the size of the main pipes. Refer to page 9. If the recommended pipe size is not available, stick to the original pipe diameter (which may result in a small capacity decrease).

6.3.Pipe connection

Be sure to perform a nitrogen blow when brazing and to read the paragraph "Caution to be taken when brazing refrigerant piping" on page 4 first.

NOTE	The pressure regulator for the nitrogen released when
	doing the brazing should be set to 0.02 MPa or less.
	(See figure 10)

1Refrigerant piping

2Location to be brazed

3Nitrogen

4Taping

5Manual valve

6Regulator

7Nitrogen

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

6.4.Connecting the refrigerant piping

1Front connection or side connection

Installation of refrigerant piping is possible as front connection or side connection (when taken out from the bottom) as shown in the figure.

1		2				3

1Left-side connection

2Front connection

3Right-side connection

NOTE	Precautions when knocking out knock holes
	■ Be sure to avoid damaging the casing
	■ After knocking out the holes, we recommend you
	remove the burrs and paint the edges and areas
	around the edges using the repair paint to prevent
	rusting.
	■ When passing electrical wiring through the knock
	holes, wrap the wiring with protective tape to
	prevent damage.

2Removing the pinched piping

When connecting refrigerant piping to the outdoor unit, first remove the pinched piping. Do not vent gases into the atmosphere.

Removing of the pinched piping must be carried out according to the following procedure:

1.Make sure the stop valves are closed.

2.Connect a charge hose to the service ports of all stop valves.

3.Recover the gas from the pinched piping.

4.When all the gas is recovered from the pinched piping, dissolve the brazing using a burner and remove the pinched piping.

Any gas remaining inside the stop valve may blow off the pinched piping, causing damage or injury.

Installation manual	RXYQ8~12P7Y1K + RXYQ8~12P7YLK
5	VRVIII System air conditioner
	4PW41760-1

See figure 6.

1Pinched piping

2Stop valve

3Service port

4Point of melting the brazing metal

Precautions when connecting field piping.

■ Perform brazing at the gas stop valve before brazing at the liquid stop valve.

■Add brazing material as shown in the figure.

■ Be sure to use the supplied accessory pipes when carrying out piping work in the field.

■Be sure that the field installed piping does not touch other pipes, the bottom panel or side panel. Especially for the bottom and side connection, be sure to protect the piping with suitable insulation, to prevent it from coming into contact with the casing.

3One outdoor unit installed: In case of RXYQ8~12

(See figure 8)

■Front connection:

Remove the stop valve cover to connect.

■Bottom connection:

Remove the knock holes on the bottom frame and route the piping under the bottom frame.

AFront connection

Remove the stop valve cover to connect.

BBottom connection:

Remove the knock holes on the bottom frame and route the piping under the bottom frame

1Gas pipe stop valve

2Liquid pipe stop valve

3Service port for adding refrigerant

4Gas side accessory pipe (1)

5Gas side accessory pipe (2)

6Liquid side accessory pipe (1)

7Liquid side accessory pipe (2)

8Brazing

9Gas side piping (field supply)

10Liquid side piping (field supply)

11Punch the knockout holes (use a hammer)

■Processing the gas side accessory pipe (2)

Only in case of connecting at lateral side, cut the gas side accessory pipe (2) as shown in figure 11.

1Gas side accessory pipe

2Cutting location

3Gas side piping (field supply)

4Base

Unit type		A	B	C	D
8 Hp	(mm)	156	17	188	247
10 Hp	(mm)	150	29	192	247
12 Hp	(mm)	150	29	192	247

NOTE	■ When connecting the piping on site, be sure to
	use the accessory piping.

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

4Outdoor units installed in a multiple outdoor unit system: RXYQ16~36

■Front connection:

Remove the stop valve cover to connect. (See figure 8)

■Bottom connection:

Remove the knock holes on the bottom frame and route the piping under the bottom frame. (See figure 8)

4.1Precautions when connecting piping between outdoor units (multiple outdoor unit system)

■To connect the piping between outdoor units, an optional multi connection piping kit BHFQ22P1007/1517 is always required. When installing the piping, follow the instructions in the installation manual that comes with the kit.

■Only proceed with piping work after considering the

limitations on installing listed	here and	in the	chapter
"6.4. Connecting the refrigerant	piping" on	page 5,	always

referring to the installation manual delivered with the kit.

4.2Possible installation patterns and configurations

■The piping between the outdoor units must be routed level or slightly upward to avoid the risk of oil retention into the piping side.

Pattern 1

1

1

1 To indoor unit

Pattern 2

1

1

1 To indoor unit

Prohibited patterns: change to pattern 1 or 2.

1

1

2

2

1To indoor unit

2Piping between outdoor units

RXYQ8~12P7Y1K + RXYQ8~12P7YLK	Installation manual
VRVIII System air conditioner	6
4PW41760-1

■To avoid the risk of oil retention to the outmost outdoor unit, always connect the stop valve and the piping between outdoor units as shown in the 4 correct possibilities of the figure below.

Prohibited patterns: change to pattern 1 or 2.

1		1
2	2	2	2

1To indoor unit

2Oil collects to the outmost outdoor unit.

Change to configuration as in figures below

1	1
2	2

1To indoor unit

2Oil collects to the outmost outdoor unit when the system stops.

Correct configuration

<![if ! IE]>

<![endif]>≥200 mm

1

1

1To indoor unit

■If the piping length between the outdoor units exceeds 2 m, create a rise of 200 mm or more in the gas line within a length of 2 m from the kit.

- If ≤2 m

1

≤2 m

2

1To indoor unit

2Piping between outdoor units

- If ≥2 m

<![if ! IE]>

<![endif]>≥200 mm

1

≤2 m

2

≥2 m

1To indoor unit

2Piping between outdoor units

5Branching the refrigerant piping

■For installation of the refrigerant branching kit, refer to the installation manual delivered with the kit.

(See figure 13)

1 Horizontal surface

Follow the conditions listed below:

-Mount the refnet joint so that it branches either horizontally or vertically.

-Mount the refnet header so that it branches horizontally.

■Installation of the multi connection piping kit (See figure 17)

-Install the joints horizontally, so that the caution label (1) attached to the joint comes to the top.

Do not tilt the joint more than 15° (see view A). Do not install the joint vertically (see view B).

-Make sure that the total length of the piping connected to the joint is absolute straight for more than 500 mm. Only if a straight field piping of more than 120 mm is connected, more than 500 mm of straight section can be ensured.

-Improper installation may lead to malfunction of the outdoor unit.

6 Piping length restrictions

Make sure to perform the piping installation within the range of the maximum allowable pipe length, allowable level difference and allowable length after branching as indicated in

"6.6. Example of connection" on page 8.

6.5.Protection against contamination when installing pipes

-Take measures to prevent foreign materials like moisture and contamination from mixing into the system.

Installation period	Protection method
More than a month	Pinch the pipe
Less than a month	Pinch or tape the pipe
Regardless of the period

- Great caution is needed when passing copper tubes through walls.

- Block all gaps in the holes for passing out piping and wiring using sealing material (field supply). (The capacity of the unit will drop and small animals may enter the machine.)

Example: passing piping out through the front

1 Plug the areas marked with " (When the piping is routed from t front panel.)

2 Gas side piping

3 Liquid side piping

1 2 3

After all the piping has been connected, make sure there is no gas leak. Use nitrogen to perform a gas leak check.

Installation manual	RXYQ8~12P7Y1K + RXYQ8~12P7YLK
7	VRVIII System air conditioner
	4PW41760-1

<![if ! IE]> <![endif]>1-4PW41760

<![if ! IE]> <![endif]>conditioner air System VRVIII

<![if ! IE]> <![endif]>RXYQ8~12P7YLK + RXYQ8~12P7Y1K

<![if ! IE]>

<![endif]>manual Installation 8

Example of connection

Branch with refnet joint

Branch with refnet joint and refnet header

Branch with refnet header

<![if ! IE]> <![endif]>.6

<![if ! IE]> <![endif]>.6

(Connection of 8 indoor units Heat pump system)

One outdoor unit

• Use the outdoor unit multi connection piping kit that is sold separately as an option

installed

a

i

a

(RXYQ8~12)

g

A

B

<![if ! IE]> <![endif]>Example

a

b

c

d

e

f

H1

k

(BHFQ22P1007+1517) for the multi installation of outdoor units. Selection method is

Outdoor units

H1

b

j

A

B

C

D

E

F

G

H1

as shown in the right table.

h

i

j

k

l

m

n

p

7

8

H2

c

d

e

f

g

h

b

c

d

e

f

g

h

i

• Do not use the outdoor unit multi connection piping kit (BHFQ22M909+1359) that

1

2

3

4

5

6

7 H2

8

1

2

3

4

5

6

1

2

3

4

5

6

7

H2

are sold separately as an option of the M-type series and do not use T-joints.

8

installed in a

H3

H3

H3

<![if ! IE]> <![endif]>of

indoor unit

multiple outdoor

i

<![if ! IE]> <![endif]>connection

unit system

H1

a

a

refnet joint

a

b

c

d

e

f

g

A

B

(RXYQ16~36)

A

F

p

H1

k

H1

B

C

D

E

G

b

j

h

i

j

k

l

m

n

7

8

refnet header

H2

b

c

d

e

f

g

h

i

1

2

3

4

5

6

7

H2

c

d

e

f

g

h

1

2

3

4

5

6

7

H2

outdoor multi connection piping kit

8

1

2

3

4

5

6

8

Install the joint part (

part in the figure) of the outdoor unit multi connection piping kit

horizontally with attention to the installation restrictions described in "connecting the

refrigerant piping".

(*) If the system capacity is RXYQ16 or more, re-read to the first outdoor branch as

seen from the indoor unit.

Actual pipe length

Pipe length between outdoor(*) and indoor units ≤165 m

[Example] unit 8: a+b+c+d+e+f+g+p≤165 m

[Example] unit 6: a+b+h≤165 m, unit 8: a+i+k≤165 m

[Example] unit 8: a+i≤165 m

Between outdoor and indoor units

Equivalent length

Equivalent pipe length between outdoor(*) and indoor units ≤190 m (Assume equivalent pipe length of refnet joint to be 0.5 m and of the refnet header to be 1.0 m. (for

calculation purposes))

Maximum allowable length

Total extension

Total piping length from outdoor unit* to all indoor units ≤1000 m

length

Between outdoor branch and outdoor unit (Only for

Actual pipe length

Piping length from outdoor branch to outdoor unit ≤10 m. Approximate length: max. 13 m

RXYQ16 or more)

Between outdoor and indoor units

Difference in

Difference in height between outdoor and indoor units (H1)≤50 m (≤40 m if outdoor unit is located in a lower

r≤10 m (Approximate length:

height

position).

max. 13 m)

Allowable height

Between indoor and indoor units

Difference in

Difference in height between adjacent indoor units (H2)≤15 m

s≤10 m (Approximate length:

height

r

s

t

max: 13 m)

t≤10 m (Approximate length:

Difference in

Between outdoor and outdoor units

Difference in height between outdoor unit (main) and outdoor unit (sub) (H3)≤5 m

max: 13 m)

height

Allowable length after the branch

Actual pipe length

Pipe length from first refrigerant branch kit (either refnet joint or refnet header) to indoor unit ≤40 m (See note 1 on next page)

[Example] unit 8: b+c+d+e+f+g+p≤40 m

[Example] unit 6: b+h≤40 m, unit 8: i+k≤40 m

[Example] unit 8: i≤40 m

Refrigerant branch kit selection

How to select the refnet joint

How to select the refnet header

• When using refnet joints at the first branch counted from the outdoor unit side.

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

Refrigerant branch kits can only be used with R410A.

Choose from the following table in accordance with the capacity of the outdoor unit.

units connected below the refnet header.

• Note: 250 type cannot be connected below the refnet header.

Outdoor unit capacity type

Refrigerant branch kit name

RXYQ8

KHRQ22M20T

Indoor capacity type

Refrigerant branch kit name

RXYQ8+10

KHRQ22M29T9

<290

KHRQ22M29H (Max. 8 branch)

RXYQ12 + RXYQ16~22

KHRQ22M64T

290≤x<640

KHRQ22M64H (Max. 8 branch)(a)

RXYQ24~36

KHRQ22M75T

≥640

KHRQ22M75H (Max. 8 branch)

(a) See note 2 on next page

• For refnet joints other than the first branch, select the proper branch kit model based on

the total capacity index.

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

unit capacity type is RXYQ16 or more.)

Indoor capacity type

Refrigerant branch kit name

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

<200

KHRQ22M20T

200≤x<290

KHRQ22M29T9

Number of outdoor units

Branch kit name

2

BHFQ22P1007

290≤x<640

KHRQ22M64T

3

BHFQ22P1517

≥640

KHRQ22M75T

[Example]

[Example]

[Example]

Example of downstream indoor units

in case of refnet joint C; indoor units 3+4+5+6+7+8

in case of refnet joint B; indoor units 7+8,

in case of refnet header;

in case of refnet header; indoor units 1+2+3+4+5+6

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