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Installation manual

5

RR+RQ71+10 RR+RQ7 RR+RQ71~12

RR+RQ71B2W1B

Split System air conditioners

4PW23689-1C

Refrigerant pipe size

Pair system 

(See figure 2)

Simultaneous operation system (twin: see 

figure 3

, triple: see

figure 4

)

The pipes between the outdoor unit and the branch (L1) should have
the same size as the outdoor connections. The pipes between the
branch and the indoor units (L2~L4) should have the same size as
the indoor connections. Branch: see marking '

' on figures 

3

~

4

.

Allowable pipe length and height difference

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

2

~

4

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.

The minimal piping length should be 5 m. If installation is performed
with less field piping, the system will be overcharged (abnormal HP,
etc.). If the distance between indoor and outdoor unit is less than
5 m, please make sure that the piping length is 

5 m by additional

bending of the pipes.

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.

When using existing refrigerant piping
Pay attention to the following points when using existing
refrigerant piping

Perform a visual check on quality of residual oil in existing
refrigerant piping.
This check is extremely important because using existing
piping with deteriorated oil will cause compressor
breakdown.
- Put some residual oil of the pipes you want to reuse on a 

piece of white paper or on the white surface of an oil 
checking reference card and compare that oil color with the 
circled color of the oil checking reference card.

- If oil color is identical to the circled color or darker, replace 

the piping, install new piping or clean the piping thoroughly.

- If oil color is lighter, the pipes can be reused without 

cleaning.

An oil checking reference card is indispensable for such
evaluation and can be obtained at your dealer.

In the following situations, the existing piping should not be
re-used and new piping should be installed.
- If the previously used model had problems with its 

compressor (this might cause oxidized coolant oil, scale 
residue and other adverse effects).

- If the indoor or outdoor units were disconnected from the 

piping for a long period of time (water or dirt might have 
gotten into the piping).

- If copper piping is corroded.

Flares should not be re-used but rather new ones made in
order to prevent leaks.

Check welded connections for gas leaks, if the local piping
has welded connections.

Replace deteriorated insulation with new material.

Refrigerant pipe size

Gas pipe

Class

Standard size

Size-up

Liquid pipe

71, 100, 125

Ø15.9

Ø19.1

Ø9.5

Allowable pipe length

Maximum allowable piping 
length (Parenthesized figure 
represents equivalent length)

Pair

L1

70 m 

(90 m)

Twin/Triple

L1+L2

Maximum total one-way pipe 
length

Twin

L1+L2+L3

80 m

Triple

L1+L2+L3+L4

Maximum branch pipe length

Twin/Triple

L2

20 m

Maximum difference between 
branch lengths

Twin

L2–L3

10 m

Triple

L2–L4

Maximum height between 
indoor and outdoor

All

H1

30 m

Maximum height between 
indoors

Twin/Triple

H2

0.5 m

Chargeless length

All

L1+L2+L3+L4

30m

Place

Installation period

Protection method

Outdoor unit

More than a month

Pinch the pipe

Less than a month

Pinch or tape the 

pipe

Indoor

Regardless of the 

period

Summary of Contents for RR71B8V3B

Page 1: ...INSTALLATION MANUAL RR71B8V3B RR71B2V3B RR100B8V3B RR71B8W1B RR71B2W1B RR100B8W1B RR125B8W1B RQ71B8V3B RQ71B2V3B RQ100B8V3B RQ71B8W1B RQ71B2W1B RQ100B8W1B RQ125B8W1B Split System air conditioners...

Page 2: ...1 2 4 5 2 4 5 9 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 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 B2 C C D1 D1...

Page 3: ...ttaen m r yksi 14 za dodr en ustanoven p edpisu 15 prema odredbama 16 k veti a z 17 zgodnie z postanowieniami Dyrektyw 18 n urma prevederilor 19 ob upo tevanju dolo b 20 vastavalt n uetele 21 22 laika...

Page 4: ...the power supply circuit or improper electrical construction may lead to electric shocks or fire Make sure that all wiring is secure using the specified wires and ensuring that external forces do not...

Page 5: ...contains high levels of salt such as that near the ocean Where voltage fluctuates a lot such as that in factories In vehicles or vessels Where acidic or alkaline vapour is present BEFORE INSTALLATION...

Page 6: ...e please install a waterproof plate within 150 mm of the underside of the unit in order to prevent the invasion of water from the lower direction 6 When installing the unit in a place frequently expos...

Page 7: ...ld comply with relevant local and national regulations The minimal pipe thickness for R410A piping must be in accordance with the table below O Annealed 1 2H Half hard Suction side obstacle Obstacle i...

Page 8: ...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 bra...

Page 9: ...e deformed if only a torque wrench is used when loosening or tightening flare nuts always lock the shut off valve with a wrench and then use a torque wrench Do not place wrenches on the valve cover Do...

Page 10: ...t coat the flare inner surface with ether oil or ester oil and initially tighten 3 or 4 turns by hand before tightening firmly After completing the installation carry out a gas leak inspection of the...

Page 11: ...rs and bring the system to 100 7 kPa After keeping the system under that condition for more than one hour check if the vacuum gauge rises or not If it rises the system may either contain moisture insi...

Page 12: ...mount R R1 R2 1 00 0 30 1 30 kg Example 2 1 G1 L1 5 m G2 L2 L3 L4 17 17 20 54 2 Over 30 m a G1 5 m R1 0 0 kg b G1 G2 30 5 54 30 29 6 4 R2 0 90 kg 3 Refrigerant charge amount R R1 R2 0 0 0 9 0 9 kg Tot...

Page 13: ...ground wire to the shut off valve attachment plate so that it does not slide 2 Secure the ground wire to the shut off valve attachment plate one more time along with the electric wiring and the inter...

Page 14: ...d wiring components Point for attention regarding quality of the public electric power supply This equipment complies with EN IEC 61000 3 11 1 provided that the system impedance Zsys is less than or e...

Page 15: ...For a missing phase in case of W1 units E0 or E6 will be displayed on the remote controller of the indoor unit Operation will be impossible with either one of these phenomena If this happens turn off...

Page 16: ...Q2M Thermo switch M1F M2F Q1RP Phase reverse circuit R1T Thermistor air R2T Thermistor coil R3T Thermistor discharge RC Signal receiver circuit S1PH Pressure switch HIGH S1PL Pressure switch LOW SD S...

Page 17: ...NOTES NOTES...

Page 18: ...4PW23689 1C Copyright Daikin...

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