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Installation manual

5

REQ71+10 REQ71~125B7W1B

Split System air conditioners

4PW19495-1B

Refrigerant pipe size

Pair system 

(See figure 2)

Allowable pipe length and height difference

See the table below concerning lengths and heights. Refer to

figure 2

.

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 R-410A only when adding refrigerant
Installation tools:
Make sure to use installation tools (gauge manifold charge hose,
etc.) that are exclusively used for R-410A 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.

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

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.

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.

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)

L1

50 m (70 m)

Maximum height between indoor and outdoor

H1

30 m

Chargeless length

L1

7.5 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

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

Содержание REQ-BW1

Страница 1: ...INSTALLATION MANUAL REQ71B7V3B REQ100B7V3B REQ71B7W1B REQ100B7W1B REQ125B7W1B Split System air conditioners...

Страница 2: ...4 5 6 6 3 1 2 3 4 5 A B A E B C D H H1 L1 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 D1 D2 D2 D2 D2 D2 E E H H L1 L1 L1 L2 L2 L2 1 1 2...

Страница 3: ...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 vastavuses...

Страница 4: ...ount exceeds the limit it may cause an oxygen deficiency accident Be sure to use only the specified accessories and parts for installation work Failure to use the specified parts may result in water l...

Страница 5: ...Gas pipe Ignition or explosion may occur if the gas leaks Water pipe Hard vinyl tubes are not effective grounds Lightning conductor or telephone ground wire Electric potential may rise abnormally if...

Страница 6: ...foundation of concrete blocks etc the height of the foundation should be maximum 150 mm 5 If you install the unit on a frame please install a waterproof plate within 150 mm of the underside of the un...

Страница 7: ...elevant local and national regulations The minimal pipe thickness for R 410A piping must be in accordance with the table below O Annealed 1 2H Half hard Suction side obstacle Obstacle is present Disch...

Страница 8: ...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...

Страница 9: ...r turns It is now closed Cautions for handling the valve cover The valve cover is sealed where indicated by the arrow Take care not to damage it After operating the valve be sure to tighten the valve...

Страница 10: ...e refrigerating system and preventing normal operation When brazing while inserting nitrogen into the piping nitrogen must be set to 0 02 MPa with a pressure reducing valve just enough so that it can...

Страница 11: ...the vacuum pump for 1 hour to 100 7 kPa vacuum drying If the system cannot be evacuated to 100 7 kPa within 2 hours repeat the operation of vacuum break and vacuum drying Then after leaving the system...

Страница 12: ...tside 1 Wire 2 Bush 3 Nut 4 Frame 5 Hose When you do not use a wire conduit be sure to protect the wires with vinyl tubes to prevent the edge of the knock out hole from cutting the wires Follow the el...

Страница 13: ...se phenomena If this happens turn off the power re check the wiring and switch the position of two of the three electrical wires If operation is not possible do not under any circumstances force the e...

Страница 14: ...hermo 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 Safety...

Страница 15: ...NOTES NOTES...

Страница 16: ...Zandvoordestraat 300 B 8400 Oostende Belgium 4PWEN19495 1B...

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