Fujitsu AU*A12LALN Service Instruction page 129

Cassette Type
SPLIT TYPE AIR CONDITIONER
INSTALLATION
INSTRUCTION SHEET
(PART NO. 9378016019)
For authorized service personnel only.
This mark indicates procedures which, if improperly performed, are most likely to result in the death of or
DANGER
serious injury to the user or service personnel.
This mark indicates procedures which, if improperly performed, might lead to the death or serious injury of
WARNING
the user.
This mark indicates procedures which, if improperly performed, might possibly result in personal harm to
CAUTION
the user, or damage to property.
DANGER
Never touch electrical components immediately after the power supply has been turned off. Electrical shock may occur. After
turning off the power, always wait 5 minutes or more before touching electrical components.
This air conditioner uses new refrigerant HFC (R410A).
The basic installation work procedures are the same as conventional refrigerant models.
However, pay careful attention to the following points:
1 Since the working pressure is 1.6 times higher than that of conventional refrigerant models, some of the piping and
installation and service tools are special. (See the table below.)
Especially, when replacing a conventional refrigerant model with a new refrigerant R410A model, always replace the
conventional piping and flare nuts with the R410A piping and flare nuts.
2 Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charging with
conventional refrigerant and for safety. Therefore, check beforehand. [The charging port thread diameter for R410A is
1/2 UNF 20 threads per inch.]
3 Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant models. Also, when
storing the piping, securely seal the openings by pinching, taping, etc.
4 When charging the refrigerant, take into account the slight change in the composition of the gas and liquid phases, and
always charge from the liquid phase side whose composition is stable.
Special tools for R410A
Tool name Contents of change
Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous mixing of other
refrigerants, the diameter of each port has been changed.
Gauge manifold
It is recommended the gauge with seals –0.1 to 5.3 MPa (–76 cmHg to 53 kgf/cm 2 ) for high pressure. –0.1 to
3.8 MPa (–76 cmHg to 38 kgf/cm 2 ) for low pressure.
Charge hose To increase pressure resistance, the hose material and base size were changed.
Vacuum pump A conventional vacuum pump can be used by installing a vacuum pump adapter.
Gas leakage detector Special gas leakage detector for HFC refrigerant R410A.
Copper pipes
Thicknesses of Annealed Copper Pipes (R410A)
It is necessary to use seamless copper pipes and it is desirable that the
amount of residual oil is less than 40 mg/10 m. Do not use copper pipes
Pipe outside diameter
having a collapsed, deformed or discolored portion (especially on the interior
6.35 mm (1/4 in.)
surface). Otherwise, the expansion valve or capillary tube may become
9.52 mm (3/8 in.)
blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when
12.70 mm (1/2 in.)
using conventional refrigerant, it is necessary to choose adequate materials.
15.88 mm (5/8 in.)
Thicknesses of copper pipes used with R410A are as shown in the table.
19.05 mm (3/4 in.)
Never use copper pipes thinner than that in the table even when it is
available on the mar ket.
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 standards parts. This installa-
tion 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 use an extension cord.
6 Do not turn on the power until all installation work is complete.
CAUTION
This installation instruction sheet describes how to the indoor unit only.
To install the outdoor unit, refer to the installation instruction sheet included with the outdoor unit.
To install the remote controller, refer to the installation instruction sheet included with the remote controller 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.
CONNECTION PIPE REQUIREMENT
CAUTION
Refer to the installation instruction sheet of the outdoor unit for description of the length of connecting pipe or for difference of
its elevation.
Liquid 9.52 mm (3/8 in.)
Diameter
Gas 15.88 mm (5/8 in.)
• • • • • Use pipe with water-resistant heat insulation.
CAUTION
Install heat insulation around both the gas and liquid pipes. Failure to do so may cause water leaks.
Use heat insulation with heat resistance above 120 °C. (Reverse cycle model only)
In addition, if the humidity level at the installation location of the refrigerant piping is expected to exceed 70%, install heat
insulation around the refrigerant piping. If the expected humidity level is 70-80%, use heat insulation that is 15 mm or thicker
and if the expected humidity exceeds 80%, use heat insulation that is 20 mm or thicker.
If heat insulation is used that is not as thick as specified, condensation may form on the surface of the insulation.
In addition, use heat insulation with heat conductivity of 0.045 W/(m·K) or less (at 20 °C).
ELECTRICAL REQUIREMENT
Connection cord (mm 2 )
MAX. MIN.
2.5
1.5
• • • • • Use conformed cord with Type 245 IEC57.
• • • • • Install all electrical works in accordance to the standard.
• • • • • Install the disconnect device with a contact gap of at least 3 mm in all poles nearby the units. (Both indoor unit and outdoor unit)
INSTALLATION PROCEDURE
STANDARD PARTS
Install the air conditioner as follows:
The following installation parts are furnished. Use them as required.
INDOOR UNIT ACCESSORIES
1
INDOOR UNIT INSTALLATION
Name and Shape Q'ty Application
Coupler heat insulation For indoor side pipe joint
2
1 Install the air conditioner in a location which can with-
Special nut A (large flange) For installing indoor unit stand a load do at least five times the weight of the
main unit and which will not amplify sound or vibra-
4
tion. If the installation location is not strong enough,
the indoor unit may fall and cause injuries.
Special nut B (small flange) For installing indoor unit
2 If the job is done with the panel frame only, there is a
4 risk that the unit will come loose. Please take care.
Template For ceiling hole cutting REMOVING THE INTAKE GRILLE
(1) Push the intake grille pushbuttons (two places).
1
(2) Open the intake grille.
Blower cover insulation For discharged air
PUSH
2
Hook wire For installing intake grille.
2
Binder For remote controller and
remote controller cord
1
binding (option)
Tapping screw For installing the remote
(ø4 × 16)
controller (option)
2
(3) Remove the grille hinge wire.
Rubber sheet For wiring cover
2
OPTIONAL PARTS
The following options are available.
• ADDITIONAL GRILLE: UTG-AGEA-W (P/N 9002230002)
Thickness
0.80 mm
0.80 mm
0.80 mm
1.00 mm
1.20 mm
SELECTING THE MOUNTING POSITION
Especially, the installation place is very important for the split type air Discharge Direction Setting
conditioner because it is very difficult to move from place to place after the
• • • • • The discharge direction can be selected as shown below.
first installation.
Decide the mounting position together with the customer as follows:
WARNING
Select installation locations that can properly support the
weight of the indoor. Install the units securely so that they
do not topple or fall.
(4 directions)
CAUTION
Piping position
1 Do not install where there is the danger of combustible
gas leakage.
Since 2-way outlet as shown below causes performance
2 Do not install near heat sources of heat, stream, of flam-
problems, do not set it.
mable gas.
3 If children under 10 years old may approach the unit,
take preventive measures so that they cannot reach
the unit.
(1) Install the indoor unit on a place having a sufficient strength so that it * For a 3-way or 2-way outlet, make sure to perform the Function Setting
withstands against the weight of the indoor unit. on the remote control. Also, make sure to use the blower cover insula-
(2) The inlet and outlet ports should not be obstructed; the air should be tion to block the outlet.
able to blow all over the room.
(3) Leave the space required to service the air conditioner. * The ceiling height cannot be set in the 3-way or 2-way outlet mode.
(4) The ceiling rear height as shown in figure. Therefore, do not change the setting in the "Setting the Ceiling Height"
(5) A place from where the air can be distributed evenly throughout the at 7 FUNCTION SETTING.
room by the unit.
(6) A place from where drainage can be extracted outdoors easily.
(7) Install the unit where noise and vibrations are not amplified.
Strong and durable ceiling
1,000 mm
or more
Obstruction
Floor
This mechanism enables the cassette body to move 35 mm down-
ward and realizes installation to the space of 265 mm. No special
works and option is needed.
You can select 2-way setting
(A) Standard setting (B) Slender setting
This product can be installed at a height of up to 4.2 m. Perform the Func-
tion Setting on the remote control in accordance with the installed height.
• Pull up while pressing the B section.
Part A detail view Part A section view
B
WARNING
Grille hinge wire
(4) Remove the intake grille.
REMOVING THE PANEL FRAME
• Pull up the corner sections (A) of the panel frame as shown in
figure (4 locations).
Part A detail view
OPEN
A
A
B
A
A
• Pull up in the direction of the arrow while holding down the C
section of figure (4 locations).
Part B detail view
C
2
INSTALLING DRAIN PIPE
CAUTION
Install the drain pipe in accordance with the instructions
100 mm or more 100 mm or more 100 mm or more
in this installation instruction sheet and keep the area warm
enough to prevent condensation. Problems with the pip-
ing may lead to water leaks.
NOTE: Install the drain pipe.
• • • • •
Install the drain pipe with downward gradient (1/50 to 1/100) and so
there are no rises or traps in the pipe.
• • • • •
Use general hard polyvinyl chloride pipe (VP25) [outside diameter
(3 directions) (2 directions) (2 directions)
32 mm] and connect it with adhesive (polyvinyl chloride) so that there
100 mm or more
is no leakage.
• • • • •
When the pipe is long, install supporters.
CAUTION
• • • • •
Do not perform air bleeding.
• • • • •
Always heat insulate the indoor side of the drain pipe.
• • • • •
When desiring a high drain pipe height, rise it up to 800 mm or less
from the ceiling within a range of 150 mm from the body. A rise dimen-
sion over this range will cause leakage.
Supporter
Pipe
Pipe
Rise
Trap
150 mm or less
Air bleeding
Max. 800 mm
3
CONNECTING THE PIPING
CAUTION
1 Do not use mineral oil on flared part.
Prevent mineral oil from getting into the system as this
would reduce the lifetime of the units.
2 While welding the pipes, be sure to blow dry nitrogen
gas through them.
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 flare nut (always use the flare nut attached to the indoor
and outdoor units respectively) onto the pipe and perform the flare
processing with a flare tool.
Use the special R410A flare tool, or the conventional flare tool.
Check if [L] is flared uniformly
and is not cracked or scratched.
Die
A
Pipe
Dimension A
Pipe outside diameter
Flare tool for R410A, clutch type
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
0 to 0.5 mm
12.70 mm (1/2 in.)
15.88 mm (5/8 in.)
19.05 mm (3/4 in.)
(A) Standard setting
Panel frame
Panel base
(B) Slender setting
CAUTION
Always remove the panel frame after removing the intake 3. BODY INSTALLATION
grille.
As for the dimension of the ceiling rear hight is above figure or more.
A (1) Install special nut A, then special nut B onto the hanging bolt.
1. POSITION THE CEILING HOLE AND HANGING (2) Raise the body and mount its hooks onto the hanging bolt between
the special nuts.
BOLTS
(3) Turn special nut B to adjust the height of the body.
(4) Leveling
Using a level, or vinyl hose filled with water, fine adjust so that the
940 mm
body is level.
(Grille measurement)
Perform final tightening by tightening the double nut firmly.
Special nut B
Hanging bolt
750 mm
(Hanging bolt position)
2. HANGING PREPARATIONS
• Firmly fasten the hanging bolts as shown in figure or by another method.
• Install the hanging bolts at a place where they would be capable of
holding a weight of at least 50 kgf per bolt.
Hole-in anchor
Hole-in plug
Concrete Insert
Hanging bolt M10
* Allowable space between the unit and the ceiling 5 mm or less
(3) When the flare nut is tightened properly by your hand, use a torque
Pipe outside diameter Dimension B
wrench to finally tighten it.
6.35 mm (1/4 in.) 9.1 mm
9.52 mm (3/8 in.) 13.2 mm
12.70 mm (1/2 in.) 16.6 mm
15.88 mm (5/8 in.) 19.7 mm
19.05 mm (3/4 in.) 24.0 mm
When using conventional flare tools to flare R410A pipes, the dimension
A should be approximately 0.5 mm more than indicated in the table (for
flaring with R410A flare tools) to achieve the specified flaring. Use a thick-
ness gauge to measure the dimension A.
Width across flats
Pipe outside Width across flats
diameter of Flare nut Hold the torque wrench at its grip, keeping it in the right
angle with the pipe, in order to tighten the flare nut
6.35 mm (1/4 in.) 17 mm
correctly.
9.52 mm (3/8 in.) 22 mm
12.70 mm (1/2 in.) 26 mm
Flare nut
15.88 mm (5/8 in.) 29 mm
6.35 mm (1/4 in.) dia.
19.05 mm (3/4 in.) 36 mm
9.52 mm (3/8 in.) dia.
12.70 mm (1/2 in.) dia.
2. BENDING PIPES
15.88 mm (5/8 in.) dia.
19.05 mm (3/4 in.) dia.
The pipes are shaped by your hands. Be careful not to collapse them.
°
Do not bend the pipes in an angle more than 90 .
Do not remove the cap from the connection pipe before connecting
When pipes are repeatedly bend or stretched, the material will harden,
the pipe.
1.5 to 2.0 m making it difficult to bend or stretch them any more. Do not bend or
stretch the pipes more than three times.
CAUTION
Be sure to connect the gas pipe after connecting the li-
quid pipe completely.
1 To prevent breaking of the pipe, avoid sharp bends.
Bend the pipe with a radius of curvature of 150 mm or
over.
2 If the pipe is bent repeatedly at the same place, it will
break.
3. CONNECTION PIPES
Indoor unit
(1) Detach the caps and plugs from the pipes.
CAUTION
1 Be sure to apply the pipe against the port on the in-
door 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.
(2) Centering the pipe against port on the indoor unit, turn the flare nut
with your hand.
B To prevent gas leakage, coat the flare
surface with alkylbenzene oil (HAB).
Do not use mineral oil.
Connection pipe
(Gas)
Indoor unit
Connection pipe
(Liquid)
INSTALLING THE PANEL FRAME
Drain pipe (I.D. 32 mm)
298.5 mm
305.5 mm 248.5 mm
Panel base
Drain pipe (I.D. 32 mm)
298.5 mm
*90° Turn
305.5 mm 248.5 mm
Panel frame
* With slender setting, turn the panel frame 90° as shown in the dia-
gram above.
Grille setting method has been changed at the marked posi-
tions on the panel frame and panel base.
(A) Standard setting (B) Slender setting
WARNING
Mark
Special nut A
No mark
Panel frame
After installing the body,
Hook
tighten the nuts.
30 mm or more
(Example)
Ceiling
* Must fit tightly against ceiling
without any gap.
* Appearance of slender setting
Vinyl hose
4
INSTALLING THE COUPLER
HEAT INSULATION
Holding spanner
After checking for gas leaks, insulate by wrapping insulation around the
Body side two parts (Gas and Liquid) of the indoor unit coupling, using the coupler
heat insulation.
After installing the coupler heat insulation, wrap both ends with vinyl tape
so that there is no gap.
Torque wrench
Coupler heat insulation
CAUTION
Body
Be sure to overlap the
insulation
CAUTION
Tightening torque
Must fit tightly against body without any gap.
16 to 18 N·m (160 to 180 kgf·cm)
30 to 42 N·m (300 to 420 kgf·cm)
49 to 61 N·m (490 to 610 kgf·cm)
No gap
63 to 75 N·m (630 to 750 kgf·cm)
90 to 110 N·m (900 to 1100 kgf·cm)
Coupler heat insulation
CAUTION
- Continued on back -