4.Preparation of Pipe

● Use a pipe cutter to cut the copper pipe.

Trimming tool

Copper pipe

●Before flaring, please put on the flare nut.

Die

Die

A

 

 

 

 

 

Copper pipe

● Please use exclusive tool

!CAUTION

●Jagged edge will cause leakage.

●Point the side to be trimmed downwards during trimming to prevent copper chips from entering the pipe.

Outer

 

 

A (mm)

Diameter (Ø)

Imperial flaring tool

Rigid flaring tool

 

 

6.35

(1/4”)

0

~ 0.5mm

1.0mm

9.52

(3/8”)

0

~ 0.5mm

1.0mm

12.7

(1/2”)

0

~ 0.5mm

1.0mm

7.Operation test

●Please ensure that the air conditioner is in normal operating condition during the operation test.

●Explain to your customer the proper operation procedures as described in the user’s manual.

●If the indoor unit does not operate, check to see that the connections are correct.

!CAUTION

●Trial run should be conducted on one unit at a time to check for incorrect wiring of connecting cord.

4 ROOM MULTI-SPLIT INVERTER TYPE ROOM AIR CONDITIONER

5. Pipe Connection

 

5.1 Pipe connection

Tighten all the way by hand.

Connecting the pipe to outdoor unit

 

(1) Remove the flare nut and seal cap from the service valve.

Do not tighten all at once, but tighten it while

fitting the flared surface to the pipe.

(2) Apply refrigerator oil to the service valve and the flared

 

portion of the pipe.

 

(3) Using a wrench, security tighten.

 

 

● In case of removing flare nut of a indoor unit, first remove a nut of small diameter side, or seal cap of large diameter side will fly out. Free from water into the piping when working.

!CAUTION ● During connection, keep away from water.

●Be sure to tighten the flare nut to the specified torque using a torque wrench. If the flare nut is tightened excessively, it may crack as time elapses, causing refrigerant leakage.

●Please be careful when bending the copper pipe.

●Screw in manually while adjusting the center. After that, use of torque wrench to tighten the connection.

 

 

 

 

Outer diameter of pipe (Ø)

Torque N·m (kgf · cm)

 

Flare nut

 

 

 

 

 

 

Small diameter side

6.35

(1/4”)

13.7-18.6 (140-190)

 

 

 

 

 

 

 

 

 

Large diameter side

9.52

(3/8”)

34.3-44.1 (350-450)

 

 

 

 

 

 

 

Torque

12.7

(1/2”)

44.1-53.9 (450-550)

 

 

 

Wrench

 

 

 

 

 

 

 

Small diameter side

6.35

(1/4”)

19.6-24.5

(200-250)

 

wrench

 

 

Valve head

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9.52

(3/8”)

19.6-24.5

(200-250)

 

 

cap

Large diameter side

 

 

 

 

 

 

 

 

12.7

(1/2”)

29.4-34.3

(300-350)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Valve core cap

 

 

12.3-15.7

(125-160)

 

 

 

 

 

 

 

 

POSSIBLE COMBINATION TO OPERATE (SAME TIME OPERATION)

 

(Reference value)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COOLING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POSSIBLE

 

 

 

 

 

OUTDOOR UNIT

 

 

 

 

 

 

 

 

 

 

 

 

 

COMBINATIONS

CAPACITY RATING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TO OPERATE

 

 

 

POWER

AMPERE

COP

 

(kW) (RANGE)

 

 

 

 

 

 

 

 

 

CONSUMPTION

(A) at

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(W)

220-240V

 

 

 

 

 

 

TOTAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8

1.80

1.80

450

2.1

– 1.9

4.00

 

 

 

 

 

 

 

 

 

 

UNIT

 

2.5

2.50

2.50

650

3.0 - 2.7

3.85

 

 

 

 

 

 

 

 

 

 

 

 

3.5

3.50

3.50

1030

4.7

– 4.3

3.40

ONE

 

 

 

 

 

 

 

 

 

 

 

 

 

5.0

5.00

5.00

1640

7.5

– 6.9

3.05

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6.0

6.00

6.00

2080

9.6

– 8.8

2.88

 

 

 

 

 

 

 

 

 

 

1.8

+ 1.8

1.80

+ 1.80

3.60

830

3.8

– 3.5

4.34

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 2.5

1.80

+ 2.50

4.30

1120

5.1

– 4.7

3.84

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 3.5

1.80

+ 3.50

5.30

1600

7.3

– 6.7

3.31

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 5.0

1.80

+ 5.00

6.80

2420

11.1

– 10.2

2.81

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 6.0

1.70

+ 5.40

7.10

2450

11.2

– 10.3

2.90

●Install the unit in a stable place to minimize vibration or noise.

●After arranging the cords and pipes, secure them in place.

Pipe connection port for Indoor unit No. 1

Pipe connection port for Indoor unit No. 2

Pipe connection port for Indoor unit No. 3

Pipe connection port for Indoor unit No. 4

Connecting cord should have arranged with piping using tape previously.

Indoor unit No. 1

Indoor unit No. 2

Indoor unit No. 3

Indoor unit No. 4

 

2.5

+ 2.5

2.50

+ 2.50

5.00

1410

6.5

– 5.9

3.55

UNITS

 

 

 

 

 

 

 

 

 

2.5

+ 3.5

2.50

+ 3.50

6.00

1950

9.0

– 8.2

3.08

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TWO

2.5

+ 5.0

2.40

+ 4.70

7.10

2530

11.6

– 10.6

2.81

 

 

 

 

 

 

 

 

 

2.5

+ 6.0

2.10

+ 5.00

7.10

2450

11.2

– 10.3

2.90

 

 

 

 

 

 

 

 

 

 

 

 

3.5

+ 3.5

3.50

+ 3.50

7.00

2630

12.1

– 11.1

2.66

 

 

 

 

 

 

 

 

 

 

 

3.5

+ 5.0

2.90

+ 4.20

7.10

2530

11.6

– 10.6

2.81

 

 

 

 

 

 

 

 

 

 

 

3.5

+ 6.0

2.60

+ 4.50

7.10

2450

11.2

– 10.3

2.90

 

 

 

 

 

 

 

 

 

 

 

5.0

+ 5.0

3.55

+ 3.55

7.10

2530

11.6

– 10.6

2.81

 

 

 

 

 

 

 

 

 

 

5.0

+ 6.0

3.20

+ 3.90

7.10

2360

10.8 – 9.9

3.01

 

 

 

 

 

 

 

 

 

1.8 + 1.8 + 1.8

1.80 + 1.80 + 1.80

5.40

1250

5.7

– 5.3

4.32

 

 

 

 

 

 

 

 

 

1.8 + 1.8 + 2.5

1.80 + 1.80 + 2.50

6.10

1590

7.3

– 6.7

3.84

Gas leakage inspection

Please use gas leakage detector to check if leakage occurs at connection of flare nut as shown on the right.

If gas leakage occurs, further tighten the connection to stop leakage. (Use the detector provided for R410A)

6. Removal Of Air From The Pipe And Gas Leakage Inspection 6.1 Air purging by using vacuum pump

Remove the valve cap of valve core.

Air purging by vacuum pump

 

 

 

 

 

 

 

Connect the charge hoses to the

When the meter reaches -101KPa (-76cmHg) during

pumping, fully tighten the shuttle.

vacuum pump and the charge port of

 

 

 

the valve core large dia. pipe side

 

Meter showing pressure

service valve, respectively.

 

 

Closed

 

 

Lo Hi

 

Fully open the LO knob of the

 

Charge hose

R410A Manifold valve

 

 

 

 

Vacuum pump

manifold valve.

Stop valve

Stop

 

valve

 

 

 

 

 

1.8

+ 1.8 + 3.5

1.80

+ 1.80 + 3.50

7.10

2210

10.1

– 9.3

3.21

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 1.8 + 5.0

1.50

+ 1.50 + 4.10

7.10

2180

10.0

– 9.2

3.26

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 1.8 + 6.0

1.35

+ 1.35 + 4.40

7.10

2160

9.9

– 9.1

3.29

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 2.5 + 2.5

1.80

+ 2.50 + 2.50

6.80

2040

9.4

– 8.6

3.33

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 2.5 + 3.5

1.65

+ 2.25 + 3.20

7.10

2210

10.1

– 9.3

3.21

 

 

 

 

 

 

 

 

 

 

UNITS

1.8

+ 2.5 + 5.0

1.40

+ 1.90 + 3.80

7.10

2180

10.0

– 9.2

3.26

 

 

 

 

 

 

 

 

 

1.8

+ 2.5 + 6.0

1.25

+ 1.70 + 4.15

7.10

2160

9.9

– 9.1

3.29

 

 

 

 

 

 

 

 

 

 

 

 

THREE

 

 

 

 

 

 

 

 

 

1.8

+ 3.5 + 3.5

1.40

+ 2.85 + 2.85

7.10

2210

10.1

– 9.3

3.21

 

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 3.5 + 5.0

1.25

+ 2.40 + 3.45

7.10

2180

10.0

– 9.2

3.26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5

+ 2.5

+ 2.5

2.36

+ 2.36

+ 2.36

7.10

2210

10.1

– 9.3

3.21

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5

+ 2.5

+ 3.5

2.10

+ 2.10

+ 2.90

7.10

2210

10.1

– 9.3

3.21

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5

+ 2.5

+ 5.0

1.80

+ 1.80

+ 3.50

7.10

2180

10.0

– 9.2

3.26

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5

+ 2.5

+ 6.0

1.60

+ 1.60

+ 3.90

7.10

2160

9.9

– 9.1

3.29

Run the vacuum pump.

Vacuum for more than 10 min.

Close the LO knob of the manifold valve.

Stop the vacuum pump.

Remove the valve cap from the spindle of the service valve.

Turn the spindles of each large and small dia. pipe side service valves full counterclockwise until they are securely tightened. Then retighten them more than 10 degrees [using a

hexagon wrench key (4mm ) without fail].

Disconnect the charge hose from the service valve.

Vacuum pump adapter

When pumping starts, slightly

Be sure the stop valve

loosen the flare nut to check

of air sucked in. Then tighten

is always fully opened.

the flare nut.

 

Fig. 6-1

Valve cap

Valve cap

Valve cap of valve core

Valve cap

Valve cap

Fig. 6-2

 

 

2.5 + 3.5 + 3.5

1.90 + 2.60 + 2.60

7.10

2210

10.1 – 9.3

3.21

 

 

 

 

 

 

 

 

 

 

2.5 + 3.5 + 5.0

1.60 + 2.25 + 3.25

7.10

2180

10.0 – 9.2

3.26

 

 

 

 

 

 

 

 

 

 

 

3.5 + 3.5 + 3.5

2.36 + 2.36 + 2.36

7.10

2140

9.8

– 9.0

3.32

 

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 1.8 +

1.8 + 1.8

1.77

+ 1.77 + 1.77 + 1.77

7.10

2140

9.8

– 9.0

3.32

 

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 1.8 +

1.8 + 2.5

1.60

+ 1.60 + 1.60 + 2.30

7.10

2140

9.8

– 9.0

3.32

 

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 1.8 +

1.8 + 3.5

1.45

+ 1.45 + 1.45 + 2.75

7.10

2140

9.8

– 9.0

3.32

 

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 1.8 +

1.8 + 5.0

1.25

+ 1.25 + 1.25 + 3.35

7.10

2140

9.8

– 9.0

3.32

UNITS

 

 

 

 

 

 

 

 

 

 

1.8

+ 1.8 +

2.5 + 2.5

1.50

+ 1.50 + 2.05 + 2.05

7.10

2140

9.8

– 9.0

3.32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 1.8 +

2.5 + 3.5

1.35

+ 1.35 + 1.80 + 2.60

7.10

2140

9.8

– 9.0

3.32

FOUR

 

 

 

 

 

 

 

 

 

1.8 + 1.8 +

3.5 + 3.5

1.20

+ 1.20 + 2.35 + 2.35

7.10

2140

9.8

– 9.0

3.32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 2.5

+

2.5

+ 2.5

1.40

+ 1.90

+ 1.90

+ 1.90

7.10

2140

9.8

– 9.0

3.32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8

+ 2.5

+

2.5

+ 3.5

1.25

+ 1.75

+ 1.75

+ 2.35

7.10

2140

9.8

– 9.0

3.32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5

+ 2.5

+

2.5

+ 2.5

1.77

+ 1.77

+ 1.77

+ 1.77

7.10

2140

9.8

– 9.0

3.32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5

+ 2.5

+

2.5

+ 3.5

1.60

+ 1.60

+ 1.60

+ 2.30

7.10

2380

10.9

– 10.0

2.98

<REMARKS>

 

 

Valve cap

 

Stopper

Valve cap of

 

O-Ring

valve core

 

Pipe

 

Attach the valve cap to the spindles

Seal cap

Valve core

of each large and small dia. pipe

Pipe

Flare nut

side service valves.

Spindle

 

 

 

Fig. 6-3

The refrigerant channel is opened so that the refrigerant will flow from the outdoor unit into the indoor unit.

*ONE UNIT INDICATED ARE ONLY FOR ONE UNIT OPERATION WHEN TWO OR THREE OR FOUR INDOOR UNITS ARE CONNECTED.

*TWO UNITS INDICATED ARE ONLY FOR TWO UNITS OPERATION WHEN TWO OR THREE OR FOUR INDOOR UNITS ARE CONNECTED.

•THREE UNITS INDICATED ARE ONLY FOR THREE UNITS OPERATION WHEN THREE OR FOUR INDOOR UNITS ARE CONNECTED.

<IA93: A >

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Hitachi RAM-72Q5 Preparation of Pipe, Operation test, Pipe Connection Pipe connection, Connecting the pipe to outdoor unit
Page 1

RAM-72Q5 specifications

Hitachi RAM-72Q5 is a notable example of advanced memory technology that has made a significant impact in various computing applications. This dynamic random-access memory (DRAM) module is part of Hitachi's longstanding tradition of innovation in semiconductor technology, focusing on high performance and reliability.

One of the key features of the RAM-72Q5 is its ability to deliver exceptional speed and efficiency. Operating at a higher data transfer rate than its predecessors, the RAM-72Q5 enables rapid access to data, which is essential in environments requiring quick processing times, such as servers and high-performance computing systems. This capability is attributed to its innovative architecture, which minimizes latency and maximizes throughput.

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In conclusion, the Hitachi RAM-72Q5 stands out due to its high performance, increased capacity, energy efficiency, and reliability. As technology continues to evolve, this RAM module represents a forward-looking solution that meets the demands of modern computing environments. Its combination of features and capabilities positions it as a leading choice for businesses seeking to optimize their operations while investing in future-proof memory technology.
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