Daikin RXYCQ24, RXYCQ28, RXYCQ32, RXYCQ38, RXYCQ40 Installation manuals

ADDENDUM INSTALLATION MANUAL

System air conditioner

RXYCQ24

RXYCQ28

RXYCQ32

RXYCQ38

RXYCQ40

RXYCQ24

RXYCQ28

RXYCQ32 VRV Classic System air conditioner

RXYCQ38

RXYCQ40

Addendum Installation manual

CONTENTS		Page
1.	Introduction................................................................................	1
	1.1. Combination.................................................................................	1
	1.2. Optional accessories ...................................................................	1
2.	Refrigerant piping ......................................................................	1
3.	Leak test and vacuum drying.....................................................	5
4.	Field wiring ................................................................................	5
	4.1. Power circuit and cable requirements ..........................................	5
	4.2. System examples5
	4.3. Field line connection: transmission wiring and
	cool/heat selection .......................................................................	6
5.	Additional refrigerant charge .....................................................	6
6.	Before operation ........................................................................	7
	6.1. Field setting .................................................................................	7

1.INTRODUCTION

This manual contains additional instructions for the installation of a VRV Classic multiple outdoor unit system. For general instructions regarding the installation of the outdoor units, refer to the VRV classic installation manual.

1.1.Combination

Refer to chapter "1.1.Combination" of the installation manual.

1.2.Optional accessories

Refer to chapter "1.3.Optional accessories" of the installation manual.

■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

BHFQ22P1007

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

RXYCQ22~40

KHRQ22M75T	KHRQ22M75H

2.REFRIGERANT PIPING

■Total capacity/quantity of indoor units

							Total capacity of indoor
	Standard combination of outdoor units						units
	RXYCQ24		=	RXYCQ10	+	RXYCQ14	300~670
	RXYCQ28		=	RXYCQ10	+	RXYCQ18	350~790
	RXYCQ32		=	RXYCQ14	+	RXYCQ18	400~960
	RXYCQ38		=	RXYCQ18	+	RXYCQ20	475~1140
	RXYCQ40		=	RXYCQ20	+	RXYCQ20	500~1200
NOTE		■	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 and B must fulfill the following restriction conditions: A≥B.

■For RXYCQ Multi only 2 outside units can be connected.

A B

1 2

1To indoor units

2Outdoor unit multi connection piping kit (first branch)

Refer to chapter "6.Refrigerant piping" of the installation manual.

1Outdoor units installed in a multiple outdoor unit system: RXCYQ24~40

■Front connection:

Remove the stop valve cover to connect (A).

■Bottom connection:

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

A		B
	2		3
1	3	1	2
			8
8	8	8	7
4	6	5	8

1.1Precautions when connecting piping between outdoor units (multiple outdoor unit system)

■The 8 Hp unit type can not be used as an independent unit in a multi system.

■To connect the piping between outdoor units, an optional multi connection piping kit BHFQ22P1007 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 in the RXYCQ installation manual, always referring to the installation manual delivered with the kit.

Addendum Installation manual	RXYCQ24~40
1	VRV Classic System air conditioner
	4P378497-1 – 2014.07

1.2Possible 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

■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

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

1	1
2	2

1To indoor unit

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

RXYCQ24~40	Addendum Installation manual
VRV Classic System air conditioner	2
4P378497-1 – 2014.07

<![if ! IE]>

<![endif]>manual Installation Addendum 3

<![if ! IE]>

<![endif]>RXYCQ24~40 conditioner air System Classic VRV 07.2014 – 1-4P378497

Example of connection

Branch with refnet joint

Branch with refnet joint and refnet header

Branch with refnet header

<![if ! IE]> <![endif]>.2

<![if ! IE]> <![endif]>.1

(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

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

(RXYCQ8~20)

g

A

B

a

b

c

d

e

f

H1

k

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

H1

b

j

A

B

C

D

E

F

G

H1

shown in the right table.

h

i

j

k

l

m

n

p

7

8

c

d

e

f

g

h

H2

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

Outdoor units

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

installed in a

H3

H3

H3

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

(RXYCQ24~40)

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 24 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 ≤135 m

[Example] unit 8: a+b+c+d+e+f+g+p≤135 m

[Example] unit 6: a+b+h≤135 m, unit 8: a+i+k≤135 m

[Example] unit 8: a+i≤135 m

Between outdoor and indoor units

Equivalent length

Equivalent pipe length between outdoor(*) and indoor units ≤155 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 ≤300 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

RXYCQ24 or more)

Between outdoor and indoor units

Difference in

Difference in height between outdoor and indoor units (H1)≤30 m.

r≤10 m (Approximate length:

height

max. 13 m)

Allowable height

Between indoor and indoor units

Difference in

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

t≤10 m (Approximate length:

height

r

t

max: 13 m)

Between outdoor and outdoor units

Difference in

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

Indoor capacity type

Refrigerant branch kit name

RXYCQ8

KHRQ22M20T

<290

KHRQ22M29H (Max. 8 branch)

RXYCQ10~12

KHRQ22M29T9

290≤x<640

KHRQ22M64H (Max. 8 branch)(a)

RXYCQ14~20, 24

KHRQ22M64T

≥640

KHRQ22M75H (Max. 8 branch)

RXYCQ28, 32, 38, 40

KHRQ22M75T

(a) See note 2 on next page

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

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

the total capacity index.

unit capacity type is RXYCQ24 or more.)

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

Indoor capacity type

Refrigerant branch kit name

<200

KHRQ22M20T

Number of outdoor units

Branch kit name

2

BHFQ22P1007

200≤x<290

KHRQ22M29T9

290≤x<640

KHRQ22M64T

≥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