Daikin RXYHQ12P8W1B, Installation Manual

RX(Y)Q5-10-1 RXQ RXYQ
RXYHQ1 RX(Y)Q14~18P7W1BA
VRVIII System air conditioner
4PW48461-1

Installation manual

8

Change to configuration as in figures below

Correct configuration

■

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

-

If 

≥

2 m

5

Branching the refrigerant piping

■

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

(See figure 13)

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 9

.

6.5.

Protection against contamination when 
installing pipes

-

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

-

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

Horizontal surface

1

1

2

2

1

To indoor unit

2

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

1

1

≥

200 mm

1

To indoor unit

1

≤

2 m

2

1

To indoor unit

2

Piping between outdoor units

1

2

≤

2 m

≥

2 m

≥

200 mm

1

To indoor unit

2

Piping between outdoor units

Installation period

Protection method

More than a month

Pinch the pipe

Less than a month

Pinch or tape the pipe

Regardless of the period

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

1

2

3

1

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

2

Gas side piping

3

Liquid side piping