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REQ71+10 REQ71~125B7W1B
Split System air conditioners
4PW19495-1B

Installation manual

6

Preventing foreign objects from entering

Plug the pipe through-holes with putty or insulating material
(procured locally) to close up all gaps, as shown in the figure.

Insects or small animals entering the outdoor unit may cause a short
circuit in the electrical box.

Cautions for handling stop valve

The stop valves for indoor-outdoor connecting piping are closed
at shipment from the factory.

The names of parts of the stop valve are shown in the figure.

Since the side boards may be 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 not apply force on the valve cover, this may result in a
refrigerant leak.

For cooling operation under low ambient temperature or any
other operation under low pressure, apply silicon sealing pad,
etc. to prevent the freezing of flare nut gas pipe portion of the
stop valve. Refer to the figure.

How to use the shut-off valve

Use hexagonal wrenches 4 mm and 6 mm.

Opening the valve

1.

Place the hex wrench on the valve bar and turn counter-
clockwise.

2.

Stop when the valve bar no longer turns. It is now open.

Closing the valve

1.

Place the hex wrench on the valve bar and turn clockwise.

2.

Stop when the valve bar no longer 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 cover
properly.

Check for refrigerant leakage after tightening the cap.

Cautions for handling service port

After the work, tighten the valve cover in place.
Tightening torque: 10.8~14.7 N•m

Precautions when connecting field piping and regarding 
insulation

Be careful not to let the indoor and outdoor branch piping come
into contact with the compressor terminal cover.
If the liquid-side piping insulation might come into contact with
the compressor terminal cover, adjust the height as shown in

figure 8

.  Also, make sure the field piping does not touch the

bolts or outer panels of the compressor.

When the outdoor unit is installed above the indoor unit the
following can occur:
The condensated water on the stop valve can move to the
indoor unit. To avoid this, please cover the stop valve with
sealing material.

If the temperature is higher than 30°C and the humidity is higher
than RH 80%, then the thickness of the sealing materials should
be at least 20 mm in order to avoid condensation on the surface
of the sealing.

1

Putty or insulating material 
(produced locally)

NOTE

Make sure to keep the valve open during operation.

1

Service port

2

Shut-off valve

3

Field piping connection

4

Valve cover

1

Spanner

2

Torque wrench

Silicon sealing pad
(Make sure there is no gap)

1

3

4

1

2

2

 Closing direction

A

Liquid side

B

Gas side

Tightening torque

Liquid pipe

13.5~16.5 N•m

Gas pipe

22.5~27.5 N•m

A

B

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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