Fujitsu AU*A12LALN Service Instruction page 127

Cassette Type
SPLIT TYPE AIR CONDITIONER
INSTALLATION
INSTRUCTION SHEET
(PART NO. 9377778017-03)
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.
Never use copper pipes thinner than that in the table even when it is 19.05 mm (3/4 in.)
available on the market.
STANDARD PARTS
The following installation parts are furnished.
Use them as required.
INDOOR UNIT ACCESSORIES
Name and Shape Q'ty Application
Coupler heat For indoor side pipe joint
insulation
2
Special nut A For installing indoor unit
(large flange) 4
Special nut B For installing indoor unit
(small flange) 4
Template For cealing openings
(Carton top) 1 cutting
Also used as packing
DECORATION PANEL ACCESSORIES
Name and Shape Q'ty Application
Connector cover For covering connector
4
Screw For mounting decoration
4 panel
Screw For mounting connector
1 cover
OPTIONAL PARTS
Exterior Parts name Model No. Summary
Wired remote Unit control is performed by
UTB - UD
controller wired remote controller
Wireless
Unit control is performed by
remote UTB - NA
wireless remote controller
controller
Install the plate at outlet
Air outlet
UTR - YDZA when carrying out 3-way
shutter plate
direction operation.
07B047_9377778017-03_f.p65 1
For authorized service personnel only.
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 standards parts. This instal-
lation 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 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.
12,000 14,000/18,000
MODEL
BTU/h model BTU/h model
Small
6.35 mm (1/4 in.) 6.35 mm (1/4 in.)
Diameter
Large 9.52 mm (3/8 in.) 12.70 mm (1/2 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)
Thickness
0.80 mm
0.80 mm
0.80 mm
1.00 mm
1.20 mm
SELECTING THE MOUNTING Discharge Direction Setting
POSITION • The discharge direction can be selected as shown below.
Decide the mounting position 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.
CAUTION
1 Do not install where there is the danger of combustible
gas leakage. * For a 3-way outlet, make sure to perform the Function Setting on the
remote control. Also, make sure to use the optional shutter panel to
2 Do not install the unit near heat source of heat, steam,
block the outlet.
or flammable gas.
* The ceiling height cannot be set in the 3-way outlet mode. Therefore,
3 If children under 10 years old may approach the unit,
do not change the setting in the "Setting the Ceiling Height" at 6 FUNC-
take preventive measures so that they cannot reach TION SETTING.
the unit.
* When the outlet is shut, be sure to install the optional Air outlet
shutter plate kit.
(1) Install the indoor unit on a place having a sufficient strength so that it
For the details of installation, please refer to Installation Manual of kit.
withstands against the weight of the indoor unit.
(2) The inlet and outlet ports should not be obstructed; the air should be
able to blow all over the room.
(3) Leave the space required to service the air conditioner.
(4) The ceiling rear height as shown in the figure.
(5) A place from where the air can be distributed evenly throughout the
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
262 mm
or more
1,000 mm
or more
Obstruction
Floor
This product can be installed at a height of up to 3.5 m. Perform the Func-
tion Setting on the remote control in accordance with the installed height.
INSTALLATION PROCEDURE
Install the air conditioner as follows:
1
INDOOR UNIT INSTALLATION
WARNING
1 Install the air conditioner in a location which can with-
stand a load do at least five times the weight of the
main unit and which will not amplify sound or vibra-
tion. If the installation location is not strong enough,
the indoor unit may fall and cause injuries.
2 If the job is done with the panel frame only, there is a
risk that the unit will come loose. Please take care.
1. INSTALLING BODY
Cealing openings and hanging bolt installation diagram
WARNING
When fastening the hangers, make the bolt positions uni-
form.
530 mm (Hanging bolt position)
24,000
BTU/h model
6.35 mm (1/4 in.)
15.88 mm (5/8 in.)
135 mm 250 mm
Drain pipe (O.D. ø25.4)
102 mm 40 mm 99 mm
Control box
Ceiling
Gas pipe
Liquid pipe
3
INSTALLING THE COUPLER
HEAT INSULATION
100 mm or more
After checking for gas leaks, insulate by wrapping insulation around the
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.
Coupler heat insulation
Body
(4 directions) (3 directions)
No gap
Piping position
Be sure to overlap the Coupler heat insulation
insulation
CAUTION
Must fit tightly against body without any gap.
2007.2.26, 10:16 AM
2
(1) Install special nut A, then special nut B onto the hanging bolt.
CONNECTING THE PIPE
(2) Raise the body and mount its hooks onto the hanging bolt between
the special nuts.
(3) Turn special nut B to adjust the height of the body.
CAUTION
WARNING
1 Do not use mineral oil on flared part. Prevent mineral
Perform final tightening by tightening the double nut firmly. 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.
Special nut A
After installing the
Hook 1. FLARING
body, tighten the nuts.
Special nut B
(1) Cut the connection pipe to the necessary length with a pipe cutter.
30 mm
(2) Hold the pipe downward so that cuttings will not enter the pipe and
Hanging bolt
or more
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.
19 mm Use the special R410A flare tool, or the conventional flare tool.
Ceiling
Check if [L] is flared uniformly
and is not cracked or scratched.
2. LEVELING
Using a level, or vinyl hose filled with water, fine adjust so that the body is Die
level.
Dimension A (mm)
Pipe outside diameter
Flare tool for R410A, clutch type
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
12.70 mm (1/2 in.)
15.88 mm (5/8 in.)
19.05 mm (3/4 in.)
Vinyl hose
Pipe outside diameter Dimension B
6.35 mm (1/4 in.)
3. INSTALLING DRAIN PIPE
9.52 mm (3/8 in.)
Note: Install the drain pipe. 12.70 mm (1/2 in.)
• • • • • Install the drain pipe with downward gradient (1/50 to 1/100) and so
15.88 mm (5/8 in.)
there are no rises or traps in the pipe.
• • • • • 19.05 mm (3/4 in.)
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.
When using conventional flare tools to flare R410A pipes, the dimension
• • • • •
When the pipe is long, install supporters.
A should be approximately 0.5 mm more than indicated in the table (for
• • • • •
Do not perform air bleeding.
flaring with R410A flare tools) to achieve the specified flaring. Use a thick-
• • • • •
Always heat insulate the indoor side of the drain pipe.
ness gauge to measure the dimension A.
• • • • • When desiring a high drain pipe height, raise it up to 700 mm or less
from the ceiling within a range of 150 mm from the body. A rise dimen-
Width across Pipe outside
sion over this range will cause leakage.
flats diameter
6.35 mm (1/4 in.)
Supporter 9.52 mm (3/8 in.)
12.70 mm (1/2 in.)
15.88 mm (5/8 in.)
Rise
19.05 mm (3/4 in.)
Trap
1.5 to 2.0 m
150 mm or less
Air bleeding
Max. 700 mm
4
ELECTRICAL WIRING
Keep the earth wire longer than the other wires.
HOW TO CONNECT WIRING TO THE
TERMINALS
Earth wire
A. For solid core wiring
(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip
the insulation to about 25 mm of expose the solid wire.
(2) Using a screwdriver, remove the terminal screw(s) on the terminal
• Use a 4-core wire cord.
board.
(3) Using pliers, bend the solid wire to form a loop suitable for the
terminal screw.
(4) Shape the loop wire properly, place it on the terminal board and
tighten securely with the terminal screw using a screwdriver. 2. CONNECTION OF WIRING
B. For strand wiring WARNING
(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip 1 Before starting work, check that power is not being
the insulation to about 10 mm of expose the strand wiring. supplied to the indoor unit and outdoor unit.
(2) Using a screwdriver, remove the terminal screw(s) on the terminal
board.
2 Match the terminal board numbers and connection
(3) Using a round terminal fastener or pliers, securely clamp a round
cord colors with those of the outdoor unit.
terminal to each stripped wire end.
Erroneous wiring may cause burning of the electric
(4) Position the round terminal wire, and replace and tighten the
parts.
terminal screw using a screwdriver.
3 Connect the connection cords firmly to the terminal
Round
A. Solid wire B. Strand wire
board. Imperfect installation may cause a fire.
terminal
4 Always fasten the outside covering of the connection
Loop
cord with the cord clamp. (If the insulator is chafed,
electric leakage may occur.)
5 Always connect the ground wire.
Insulation
Screw with
6 Install the remote controller wires so as not to be di-
special washer
rect touched with your hand.
Screw with
Round terminal special washer
(1) Remove the control box cover and install each connection wire
Terminal Round
Wire
board
terminal
Wire
Screw
1. CONNECTION DIAGRAMS
Connection cord (to outdoor unit)
Control line
3
2
1
Power line
Indoor unit
side
Wired remote controller cord (option)
*
Red
3
White
2
Black
1
Indoor unit
side
* Ground the remote controller ip it has a ground wire
2. BENDING PIPES
The pipes are shaped by your hands. Be careful not to collapse them.
Do not bend the pipes in an angle more than 90 ° .
When pipes are repeatedly bend or stretched, the material will harden,
making it difficult to bend or stretch them any more. Do not bend or
stretch the pipes more than three times.
CAUTION
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
B 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.
A
Pipe
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.
0 to 0.5
To prevent gas leakage, coat the flare
surface with alkylbenzene oil (HAB).
Do not use mineral oil.
Connection pipe
0
(mm)
-0.4 (Gas)
9.1
13.2
Connection pipe
16.6
(Liquid)
Indoor unit
19.7
24.0
(3) When the flare nut is tightened properly by your hand, use a torque
wrench to finally tighten it.
Holding spanner
Width across flats
of Flare nut
Body side
17 mm
22 mm
26 mm
Torque wrench
29 mm
36 mm
CAUTION
Hold the torque wrench at its grip, keeping it in the right
angle with the pipe, in order to tighten the flare nut
correctly.
Flare nut Tightening torque
6.35 mm (1/4 in.) dia. 14 to 18 N·m (140 to 180 kgf·cm)
9.52 mm (3/8 in.) dia. 33 to 42 N·m (330 to 420 kgf·cm)
12.70 mm (1/2 in.) dia. 50 to 62 N·m (500 to 620 kgf·cm)
15.88 mm (5/8 in.) dia. 63 to 77 N·m (630 to 770 kgf·cm)
19.05 mm (3/4 in.) dia. 100 to 110 N·m (1,000 to 1,100 kgf·cm)
(2) After wiring is complete, secure the remote controller cord, connec-
tion cord, and power cord with the cord clamps.
Connection cord
(to outdoor unit)
Power supply cord
Wired remote controller
or connection cord
cord (option)
Cord clamp Connection cord
(to outdoor unit)
G
Cord clamp
Wired remote controller cord
(option)
Control box cover (3) Install control box cover.
CAUTION
Do not bundle the remote controller cord, or wire the re-
mote controller cord in parallel, with the indoor unit con-
nection wire (to the outdoor unit) and the power supply
cord. It may cause erroneous operation.
(Continued to the next page)