Daikin RZQSG71L3V1B, Installation Manual

Installation manual

6

Allowable pipe length and height difference

See the table below concerning lengths and heights. Refer to figures

2

, 

3

, 

4

 and 

5

. Assume that the longest line in the figure corresponds

with the actual longest pipe, and the highest unit in the figure
corresponds with the actual highest unit.

Allowable pipe length

P

RECAUTIONS

ON

REFRIGERANT

PIPING

■

Do not allow anything other than the designated refrigerant to
get mixed into the freezing cycle, such as air, etc. If any
refrigerant gas leaks while working on the unit, ventilate the
room thoroughly right away.

■

Use R410A only when adding refrigerant
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 and moisture) from mixing into the system.
Vacuum pump:
Use a 2-stage vacuum pump with a non-return valve
Make sure the pump oil does not flow oppositely into the system
while the pump is not working.
Use a vacuum pump which can evacuate to –100.7 kPa (5 Torr,
–755 mm Hg).

■

During tests never pressurize the appliances with a pressure
higher than the maximum allowable pressure (see unit name
plate: PS).

■

In order to prevent dirt, liquid or dust from entering the piping,
cure the piping with a pinch or taping.

Great caution is needed when passing copper tubes through
walls.

■

In case of simultaneous operating system
-

Upward and downward piping should be performed at the 
main piping line.

-

Use branch piping kit (optional) for branching refrigerant 
pipes.

Precautions to be taken. (For details, refer to the manual attached to
branch piping kit.)

-

Install the branch pipes horizontally (with a maximum 
inclination of 15°) or vertically.

-

Length of branch pipe to the indoor unit should be as short as 
possible.

-

Try to keep lengths of both branch pipes to the indoor unit 
equal.

R

EFRIGERANT

PIPING

■

Field pipes can be installed in four directions.

Figure - 

Field pipes in four directions

■

Cutting out the two slits makes it possible to install as shown in
the 

figure "Field pipes in four directions"

.

(Use a metal saw to cut out the slits.)

■

To install the connecting pipe to the unit in a downward direction,
make a knockout hole by penetrating the centre area around the
knockout hole using a 

Ø

6 mm drill. (See 

figure "Field pipes in

four directions"

.)

■

After knocking out the knock-out, it is recommended to apply
repair paint to the edge and the surrounding end surfaces to
prevent rusting.

Allowable pipe length

Liquid pipe 

size

Model

71

100

125

140

Maximum total one-way piping length

Pair

L1

standard

30 m 

(40 m)

50 m (70 m)

• Twin and triple
• Double twin

• L1+L2
• L1+L2+

L4

standard

Maximum allowable piping length

(a)

(a) Parenthesized figure represents the equivalent length.

Twin

L1+L2+L3

—

30 m

50 m

50 m

Triple

L1+L2+L3+
L4

—

Double twin

L1+L2+L3+
L4+L5+L6+
L7

—

Maximum branch piping length

• Twin and triple
• Double twin

• L2
• L2+L4

—

20 m

Maximum difference between branch lengths

Twin

L2–L3

—

10 m

10 m

10 m

Triple

L2–L4

—

Double twin

• L2–L3
• L4–L5
• L6–L7
• (L2+L4)–

(L3+L7)

—

Maximum height between indoor and outdoor

All

H1

—

15 m

30 m

Maximum height between indoors

Twin, triple and 
double twin

H2

—

0.5 m

Chargeless length

All

L1+L2+L3+
L4+L5+L6+
L7

standard

≤

30 m

Place

Installation period

Protection method

Outdoor unit

More than a month

Pinch the pipe

Less than a month

Pinch or tape the pipe

Indoor unit

Regardless of the 

period

1

Drill

8

Pipe outlet plate

2

Centre area around 
knockout hole

9

Screw front plate

10

Pipe outlet plate screw

3

Knockout hole

11

Forward

4

Slit

12

Backward

5

Connecting pipe

13

Sideways

6

Bottom frame

14

Downward

7

Front plate

4

4

3

2

1

7

8

9

10

11

14

13

12

5

6