Fujitsu 9316421073 Installationshandbuch - Seite 5

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Fujitsu 9316421073 Installationshandbuch

Strip

10 mm

Screw with special washer

Wire

Crimp-type terminal

Terminal board

Terminal block

Screw with special washer

Crimp-type terminal

Match the terminal block numbers and connection cable colors with those of the indoor

unit.

Erroneous wiring may cause burning of the electric parts.

Connect the connection cables ﬁ rmly to the terminal block. Imperfect installation may

cause a ﬁ re.

Always fasten the outside covering of the connection cable with the cable clamp. (If the

insulator is chafed, electric leakage may occur.)

Securely earth the power cable plug.

Do not use the earth screw for an external connector. Only use for interconnection

between two units.

5.5. Connecting the piping

CONNECTION

(1) Install the outdoor unit wall cap (supplied with the optional installation set or pro-

cured at the site) to the wall pipe.

(2) Connect the outdoor unit and indoor unit piping.

(3) After matching the center of the ﬂ are surface and tightening the nut hand tight,

tighten the nut to the speciﬁ ed tightening torque with a torque wrench. (Table 1)

FLARING

(1) Cut the connection pipe to the necessary

length with a pipe cutter.

(2) Hold the pipe downward so that cuttings will

not enter the pipe and remove the burrs.

(3) Insert the ﬂ are nut onto the pipe and ﬂ are the

pipe with a ﬂ aring tool.

Insert the flare nut (always use the flare nut

a t t a c h e d t o t h e i n d o o r a n d o u t d o o r u n i t s

respectively) onto the pipe and perform the ﬂ are

processing with a ﬂ are tool.

U s e t h e s p e c i a l R 4 1 0 A f l a r e t o o l , o r t h e

conventional (for R22) ﬂ are tool.

When using the conventional ﬂ are tool, always use

an allowance adjustment gauge and secure the A

dimension shown in table 2.

BENDING PIPES

(1) When bending the pipe, be careful not to crush it.

(2) To prevent breaking of the pipe, avoid sharp bends.

Bend the pipe with a radius of curvature of 70 mm or over.

(3) If the copper pipe is bend the pipe or pulled to often, it will become stiff. Do not

bend the pipes more than three times at one place.

Holding spanner

Body side

90°

Torque wrench

Table 1

Flare nut tightening torque

Flare nut

6.35 mm dia.

9.52 mm dia.

Table 2

Pipe outside diameter

Pipe outside

Flare tool for

diameter

R410A, clutch type

ø 6.35 mm (1/4")

0 to 0.5

ø 9.52 mm (3/8")

0 to 0.5

Crimp-type terminal

Sleeve

Wire

CAUTION

Check if [L] is ﬂ ared uniformly and

is not cracked or scratched.

Die

Pipe

To prevent gas leakage, coat the ﬂ are

surface with refrigerator oil.

Diameter (mm) x Torque (N • m)

17 x 16 ~ 18

22 x 32 ~ 42

A (mm)

Conventional (R22) Flaring tool

Clutch type

Wing nut type

1.0 to 1.5

1.5 to 2.0

1.0 to 1.5

1.5 to 2.0

Fasten a ﬂ are nut with a torque wrench as instructed in this manual. If fastened too

tight, the ﬂ are nut may be broken after a long period of time and cause a leakage of

refrigerant.

5.6. Air purge

Always use a vacuum pump to purge the air.

Refrigerant for purging the air is not charged in the outdoor unit at the factory.

Close the high pressure side valve of the gauge manifold fully and do not operate it during

the following work.

Refrigerant must not be discharged into atmosphere.

After connecting the piping , check the joints for gas leakage with gas leak detector.

(1) Check if the piping connections are secure.

(2) Check that the stems of 2-way valve and 3-way valve are closed fully.

(3) Connect the gauge manifold charge hose to the charging port of the 3-way valve (side

with the projection for pushing in the valve core).

(4) Open the low pressure side valve of the gauge manifold fully.

(5) Operate the vacuum pump and start pump down.

(6) Slowly loosen the ﬂ are nut of the 3-way valve and check if air enters, then retighten

the ﬂ are nut.

(When the ﬂ are nut is loosened the operating sound of the vacuum pump changes

and the reading of the compound pressure gauge goes from minus to zero.)

(7) Pump down the system for at least 15 minutes, then check if the compound pressure

gauge reads -0.1 MPa (-76 cmHg, -1 bar).

(8) At the end of pump down, close the low pressure side gauge of the gauge manifold

fully and stop the vacuum pump.

(9) Slowly loosen the valve stem of the 3-way valve. When the compound pressure

gauge reading reaches 0.1-0.2 MPa, retighten the valve stem and disconnect the

charge hose from the 3-way valve charging port.

(If the stem of the 3-way valve is opened fully before the charge hose is disconnect-

ed, it may be difﬁ cult to disconnect the charge hose.)

(10) Fully open the valve stems of the 2-way valve and 3-way valve using a hexagon

wrench. (After the valve stem begins to turn, turn it with a torque of less than

2.9 N • m (30 kgf • cm) until it stops turning.)

(11) Firmly tighten the 2-way valve and 3-way valve blank cap and the charging port cap.

way valve

3-way valve

Flare nut

Charging port

Charging port cap

Blank cap (2-way valve)

Blank cap (3-way valve)

Charging port cap

5.7. TEST RUN

 Perform test operation and check items below.

 For the test operation method, refer to the operating manual.

 The outdoor unit, may not operate, depending on the room temperature. In this case,

press the TEST RUN button on the remote controller while the air conditioner is running,

(Point the transmitter section of the remote controller toward the air conditioner and

press the TEST RUN button with the tip of a ball-point pen, etc.)

 To end test operation, press the remote controller START/STOP button.

(When the air conditioner is run by pressing the TEST RUN button, the OPERATION

indicator lamp and TIMER indicator lamp will simultaneously ﬂ ash slowly.)

OUTDOOR UNIT

(1) Is there any abnormal noise and vibration during

operation?

(2) Will noise, wind, or drain water from the unit

disturb the neighbors?

(3) Is there any gas leakage?

CAUTION

Gauge manifold

Compound pressure gauge

Pressure gauge

-0.1 MPa

(-76 cmHg

-1 bar)

Low pressure

side valve

Valve stem

Charge

hose

Blank cap

Charge hose

Vacuum pump

Tightening torque

20.0 to 25.0 N • m (200 to 250 kgf • cm)

12.5 to 16.0 N • m (125 to 160 kgf • cm)

Transmitter section

TEST RUN button

High

pressure

side valve

(closed)

En-4