Fujitsu 9370083002 Installation Instruction Sheet
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English
Cassette Type (VRF System)
Refrigerant
R407C&R22
INSTALLATION INSTRUCTION SHEET
(PART NO. 9370083002)
This air conditioner uses R407C and R22.
For authorized service personnel only.
WARNING!
This mark indicates procedures which, if improperly performed, might lead to the death or serious injury of
the user.
CAUTION!
This mark indicates procedures which, if improperly performed, might possibly result in personal harm to the
user, or damage to property.
WARNING
1 For the air conditioner to operate satisfactorily, install it as outlined in this installation instruction sheet.
2 Connect the indoor unit and outdoor unit with the air conditioner piping and cords available from our stand-
ard parts. This installation instruction sheet describes the correct connections using the installation set
available from our standard parts.
3 Installation work must be performed in accordance with national wiring standards by authorized personnel
only.
4 If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact with
a flame, it produces a toxic gas.
5 Do not turn on the power until all installation work is complete.
6 When installing or moving the air conditioner, use care not to charge it with the wrong refrigerant (such as
R407C or R22).
CAUTION
Observe the following precautions when using R407C refrigerant.
• Do not use mineral oil on flared part.
Prevent mineral oil from getting into the system as this would reduce the lifetime of the unit.
• Never use piping which has been used for previous installations. Only use parts that are delivered with the
unit.
• Be careful not to scratch the air conditioner when handling it.
• After installation, explain correct operation to the customer, using the operating manual.
• Let the customer keep this installation instruction sheet because it is used when the air conditioner is
serviced or moved.
Page
CONTENTS .................................................................... 1
SAFTY PRECAUTIONS .................................................. 1
STANDARD PARTS ........................................................ 2
SELECTING THE MOUNTING POSITION ..................... 2
INSTALLATION PROCEDURE ....................................... 3
1. INDOOR UNIT INSTALLATION .................................. 3
2. INSTALLING DRAIN PIPE .......................................... 3
3. CONNECTION PIPE REQUIREMENT ....................... 4
Page
4. CONNECTING THE PIPING....................................... 4
5.
INSTALLING THE COUPLER HEAT INSULATION .........
5
6. ELECTRICAL REQUIREMENT................................... 6
7. ELCTRICAL WIRING .................................................. 6
8. CIRCUIT BOARD SETTING . ..................................... 8
9. GRILLE INSTALLATION ........................................... 10
10. TEST OPERATION ................................................. 13
11. AN ERROR DISPLAY .............................................. 14
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STANDARD PARTS
The following installation parts are supplied. Use them as required.
Name and Shape
Coupler heat
insulation
Special nut A
(large flange)
Special nut B
(small flange)
Q’ty
2
4
4
Name and Shape
Bolt
Washer
Blower cover insulation
Q’ty
4
4
2
INDOOR UNIT ACCESSORIES GRILLE ACCESSORIES
Name and Shape
Template
Binder
Q’ty
1
2
SELECTING THE MOUNTING POSITION
• Leave the space specified in Fig. 1 so that the air from the blower
will cover the entire room.
• Install the indoor unit on a place having a sufficient strength so
that it withstands against the weight of the indoor unit.
• A place from where drainage can be extracted outdoors easily.
Fig. 1
Strong and durable ceiling
250 mm (9-3/8”)
or more
1,000 mm (39”)
or more
Obstruction
Service space
1,000 mm (39”)
or more
WARNING
1 Never install in a room where there is the poten-
tial of leaking flammable gas. A spark could ignite the gas and cause an explosion or fire.
2 Avoid installing in a location with high tempera-
ture.
Fig. 2
100 mm (4”)
or more
100 mm (4”)
or more
100 mm (4”)
or more
1,000 mm (39”)
or more
(4 directions) (3 directions) (2 directions) (2 directions)
Pipe
• The blower direction can be set for two directions or three di-
rections. When using two-direction or three-direction blower, follow Fig. 2 for the blower direction and space.
• The method for changing the blower direction is shown in the
“9. GRILLE INSTALLATION” section of the “INSTALLATION
PROCEDURE”.
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INSTALLATION PROCEDURE
Install the air conditioner as follows.
1. INDOOR UNIT INSTALLATION
(1) Make the holes for installing in the ceiling. (Fig. 4)
(2) Install the hanging bolts (M10), refer to the position in Fig. 3.
(3) Install special nut A, then special nut B onto the hanging bolt (Fig. 4).
(4) Raise the body and mount its hooks onto the hanging bolt between the special nuts.
(5) Turn special nut B to adjust the height of the body.
Fig. 3
(Grille measurement)
650 mm (25-15/32”)
(Hanging bolt position)
400 mm (15-3/4”)
(Hanging bolt position)
606 mm (23-27/32
”)
Fig. 4
131 mm (5-5/32
”)
111 m m
(4-3/8”)
46 mm (1-27/32”)
86 mm (3-3/8”)
41 mm (1-9/16”)
250 mm (9-27/32
”)
(Ceiling opening measurement)
(
600 mm ( 23-5/8”))
Drain pipe
40 mm (1-9/16”)
Ceiling
Special nut A
Hook
Special nut B
Hanging bolt
30 mm
or more
15 mm (19/32”)
WARNING
1 Perform final tightening by tightening the double nut firmly. The product may fall if not installed properly.
2 Using a level, or vinyl hose filled with water, fine adjust so that the body is level.
Max. 400 mm
(15”)
Rise
Trap
Supporter
1.5 to 2 m
(5 to 6.5 ft)
Air bleeding
150 mm (6”) or less
2. INSTALLING DRAIN PIPE
CAUTION
Install the drain pipe in accordance with the instructions in this installation instruction sheet and keep the area
warm enough to prevent condensation. Problems with the piping may lead to water leaks.
Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm (1-1/4”)] and connect it with adhesive (polyvinyl chloride) so that there is no leakage.
Always heat insulate the indoor side of the drain pipe.
• Do not provide a rise, trap and air bleeding.
• Provide a downward gradient (1/50 to 1/100).
• Provide supports when long pipes are installed.
• When desiring a high drain pipe height, raise it up to 400 mm
(15”) or less from the ceiling within a range of 150 mm (6”) from
the body. A rise dimension over this range will cause leakage.
Gradient 1/50 to 1/100
Fig. 5
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3. CONNECTION PIPE REQUIREMENT
(1) Connected to outdoor unit
Table 1
unit : mm
Capacity of Suction Discharge
outdoor unit Gas Pipe Gas Pipe
Liquid Pipe
90 ø28.58 (1.2) ø19.05 (1.0) ø12.7 (0.8)
( ) : thickness
(2) Connected between two immediately adjacent refrigerant branch kits
Table 2
unit : mm
Total capacity Suction Discharge
of indoor unit Gas Pipe Gas Pipe
Liquid Pipe
Less than 30 ø15.88 (1.0) ø12.7 (0.8) ø9.53 (0.8)
31 or more to 60 ø19.05 (1.0) ø15.88 (1.0) ø9.53 (0.8)
61 or more ø28.58 (1.2) ø19.05 (1.0) ø12.7 (0.8)
( ) : thickness
(3) Connected to indoor unit
Table 3
unit : mm
Capacity of
indoor unit
Gas Pipe Liquid Pipe
7, 9 ø9.53 (0.8) ø6.35 (0.8)
12, 14 ø12.7 (0.8) ø6.35 (0.8)
18, 20, 24, 25 ø15.88 (1.0) ø6.35 (0.8)
30 ø15.88 (1.0) ø9.53 (0.8)
36, 45, 54, 60 ø19.05 (1.0) ø9.53 (0.8)
( ) : thickness
* Capacity: The number displayed on the model name for the indoor and outdoor units.
• Use pipe with water-resistant heat insulation.
• The discharge gas pipe is only connected on heat recovery models.
4. CONNECTING THE PIPING
1. FLARE PROCESSING
(1) Cut the connection pipe with pipe cutters so that the pipe is
not deformed.
(2) Holding the pipe downwards so that cuttings cannot enter the
pipe and remove the burrs.
(3) Remove the flare nut from the indoor unit pipes and assemble
as shown in Table 4 and insert the flare nut onto the pipe, and
flare with a flaring tool.
(4) Check if the flared part “L” (Fig. 6) is spread uniformly and that
there are no cracks.
Table 4
Pipe
Liquid pipe
(ø6.35 mm)
Gas pipe
(ø9.53 mm)
Gas pipe
(ø12.7 mm)
Gas pipe
(ø15.88 mm)
Width across flats
17 mm
22 mm
24 mm
24 mm
Fig. 6
Width across flats
L dimension
1.4 to 1.7 mm
1.8 to 2.0 mm
1.9 to 2.2 mm
2.2 to 2.4 mm
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2. CONNECTION PIPES
When the flare nut is tightened properly by your hand, hold the
body side coupling with a separate spanner, then tighten with a
torque wrench (Fig. 8, Table 5).
Fig. 7
Indoor unit
Liquid pipe
Gas pipe
Holding spanner
Body side
Torque wrench
Fig. 8
Table 5: Flare nut tightening torque
Tightening Torque
150 to 220 kgf·cm (14.7 to 19.6 N·m)
310 to 350 kgf·cm (30.4 to 34.3 N·m)
500 to 550 kgf·cm (49.0 to 53.3 N·m)
750 to 800 kgf·cm (73.5 to 78.4 N·m)
Flare nut
Liquid pipe (ø6.35 mm)
Gas pipe (ø9.53 mm)
Gas pipe (ø12.7 mm)
Gas pipe (ø15.88 mm)
CAUTION
1 Be sure to apply the pipe against the port on the indoor unit correctly. If the centering is improper, the flare
nut cannot be tightened smoothly. If the flare nut is forced to turn, the threads will be damaged.
2 Do not remove the flare nut from the indoor unit pipe until immediately before connecting the connection
pipe.
3 Hold the torque wrench at its grip, keeping it in the right angle with the pipe as shown in Fig. 8, in order to
tighten the flare nut correctly.
5.
INSTALLING THE COUPLER HEAT INSULATION
After checking for gas leaks, insulate by the coupler heat insulation around the gas pipe and liquid pipe of the indoor unit.
Fig. 9
CAUTION
Must fit tightly against body without any gap.
Body
Coupler heat
insulation
Be sure to overlap
the insulation
No gap
Coupler heat insulation
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