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RZQS71~125B7V3
Split System air conditioners
4PW32097-1

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).

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 center 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

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

2

Center area around knockout hole

3

Knockout hole

4

Slit

5

Connecting pipe

6

Bottom frame

7

Front plate

8

Pipe outlet plate

9

Screw front plate

10

Pipe outlet plate screw

A

Forward

B

Backward

C

Sideways

D

Downward

4

4

3

2

1

7

8

9

10

A

D

C

B

5

6

Summary of Contents for RZQS71B7V3

Page 1: ...INSTALLATION MANUAL RZQS71B7V3 RZQS100B7V3 RZQS125B7V3 Split System air conditioners...

Page 2: ...7 6 6 8 3 3 1 3 2 4 5 A B A E B C D H H1 L1 H1 H2 L3 L1 L2 H1 H2 L4 L1 L3 L2 H1 H2 L7 L1 L6 L5 L4 L3 L2 A A B2 B2 B2 C C D1 D1 D1 D2 D2 D2 D2 D2 E E H H L1 L1 L1 L2 L2 L2 A A B1 B1 B1 B1 B1 B1 B2 B2 B...

Page 3: ...u condi ia ca acestea s fie utilizate n conformitate cu instruc iunile noastre 19 skladni z naslednjimi standardi in drugimi normativi pod pogojem da se uporabljajo v skladu z na imi navodili 20 on va...

Page 4: ...on may result in water leakage electric shocks or fire Perform installation work in accordance with this installation manual Improper installation may lead to water leakage electric shocks or fire Whe...

Page 5: ...rding to national regulations Do not connect the earth wire to gas or water pipes lightning conductor or telephone earth wire Incomplete grounding may cause electric shocks Gas pipe Ignition or explos...

Page 6: ...ration of the operational capacity Frequent frost acceleration in heating operation Disruption of operation due to rise of high pressure When a strong wind blows continuously on the face of the unit t...

Page 7: ...pe disposal If drain pipe disposal from the outdoor unit causes trouble for example if the drain water may splash on people provide the drain piping using a drain socket optional Make sure the drain w...

Page 8: ...e sizes must have the same size as the connected indoor units pipe sizes Branch see marking on figures 3 4 and 5 Selection of branch pipe L A L H 0 L 1 2H 150 250 1 2H L 200 300 H L Installation impos...

Page 9: ...nch pipe to the indoor unit should be as short as possible Try to keep lengths of both branch pipes to the indoor unit equal REFRIGERANT PIPING Field pipes can be installed in four directions Figure F...

Page 10: ...r to the figure Take care not to damage it After operating the valve be sure to tighten the valve cover properly Check for refrigerant leakage after tightening the cap Cautions for handling service po...

Page 11: ...f oxidised film on the inside of the pipes adversely affecting valves and compressors in the refrigerating system and preventing normal operation When brazing pipes however do not use oxidation preven...

Page 12: ...0 m G1 G2 30 m Based on this decide R2 in the table R1 0 3 Total additional charge amount R R1 R2 kg Table 2 Length unit m additional charging of refrigerant unit kg Example 1 1 G1 L1 35 m G2 L2 L3 7...

Page 13: ...e bundled cables into a unit Fix cables so that cables do not make contact with the pipes especially on high pressure side Secure the electrical wiring with clamping material as shown in the figure be...

Page 14: ...wiring works Form the wires and fix the cover firmly so that the cover may be fit in properly Precautions on wiring of power supply and inter unit wiring Use a round crimp style terminal for connectio...

Page 15: ...pt displaying the heating symbol all the time and the unit will switch to heating operation automatically after elapse of that time 2 In case you cannot operate the unit in test run mode for any unusu...

Page 16: ...r code U4 or UF is displayed on the remote controller check the inter unit branch wiring connection The reversed phase protection detector of this product only works during the initialisation stage af...

Page 17: ...r air R2T Thermistor coil R3T Thermistor discharge pipe R4T Thermistor suction pipe R5T Thermistor power module RC Signal receiver circuit S1NPL Pressure sensor low S1PH Pressure switch high S1PL Pres...

Page 18: ...Zandvoordestraat 300 B 8400 Oostende Belgium 4PW32097 1...

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