Fujitsu AUUB18TLAV Installation Manual

Fujitsu AUUB18TLAV Installation Manual
MANUEL D’INSTALLATION
UNITÉ INTÉRIEURE (type cassette)
Pour le personnel agréé uniquement.
MANUAL DE INSTALACIÓN
UNIDAD INTERIOR (Tipo casete)
AUUB18TLAV
AUUB24TLAV
AUUB30TLAV
AUUB36TLAV
Únicamente para personal de servicio autorizado.
English
For authorized service personnel only.
Français
INDOOR UNIT (Cassette type)
Español
INSTALLATION MANUAL
PART NO. 9371022314-05
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INSTALLATION MANUAL
PART NO. 9371022314-05
VRF system indoor unit (Cassette type)
1.
SAFETY PRECAUTIONS .........................................................................................1
1.1. IMPORTANT! Please read before starting.........................................................1
1.2. SPECIAL PRECAUTIONS.................................................................................1
2.
ABOUT THIS PRODUCT..........................................................................................2
2.1. Precautions for using the R410A refrigerant ......................................................2
2.2. Special tool for R410A .......................................................................................2
2.3. Accessories .......................................................................................................2
2.4. Optional parts ....................................................................................................2
2.5. About unit of the length ......................................................................................2
3.
INSTALLATION WORK ............................................................................................2
3.1. Selecting an installation location .......................................................................2
3.2. Installation dimensions ......................................................................................3
3.3. Installing the unit ................................................................................................3
• Do not supply power to the unit until all wiring and tubing are completed or reconnected
and checked.
• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate
earthing (grounding) can cause accidental injury or death.
• Earth (Ground) the unit following local electrical codes.
• Connect all wiring tightly. Loose wiring may cause overheating at connection points
and a possible fire hazard.
When Transporting
Be careful when picking up and moving the indoor and outdoor units. Get a partner to
help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin
aluminum fins on the air conditioner can cut your fingers.
PIPE INSTALLATION ...............................................................................................5
When Installing...
4.1. Selecting the pipe material ................................................................................5
4.2. Pipe requirement ...............................................................................................5
4.3. Flare connection (pipe connection) ...................................................................5
4.4. Installing heat insulation ....................................................................................6
...In a Ceiling or Wall
5.
INSTALLING DRAIN PIPES .....................................................................................6
6.
ELECTRICAL WIRING .............................................................................................7
6.1. Electrical requirement ........................................................................................8
6.2. Wiring method ...................................................................................................8
6.3. Unit wiring ..........................................................................................................8
6.4. Connection of wiring ..........................................................................................9
6.5. External input and external output (Optional parts) ...........................................10
7.
When Wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY
A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS
SYSTEM.
Contents
4.
1.2. SPECIAL PRECAUTIONS
FIELD SETTING .......................................................................................................12
7.1. Setting the address ............................................................................................12
7.2. Custom code setting ..........................................................................................13
7.3. Function setting .................................................................................................13
8.
CASSETTE GRILLE INSTALLATION .......................................................................15
9.
TEST RUN ................................................................................................................15
9.1. Test run using Outdoor unit (PCB) .....................................................................15
9.2. Test run using Remote Controller ......................................................................15
10. CHECK LIST.............................................................................................................15
11. ERROR CODES .......................................................................................................15
1. SAFETY PRECAUTIONS
Make sure the ceiling/wall is strong enough to hold the unit’s weight. It may be necessary
to construct a strong wood or metal frame to provide added support.
...In a Room
Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water damage to walls and floors.
...In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable air baffle.
...In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher than drifting snow.
When Connecting Refrigerant Tubing
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before
connecting them, then tighten the nut with a torque wrench for a leak-free connection.
• Check carefully for leaks before opening the refrigerant valves.
When Servicing
• Turn the power OFF at the main circuit breaker panel before opening the unit to check
or repair electrical parts and wiring.
• Keep your fingers and clothing away from any moving parts.
• Clean up the site after you finish, remembering to check that no metal scraps or bits of
wiring have been left inside the unit being serviced.
• After installation, explain correct operation to the customer, using the operating manual.
DANGER
1.1. IMPORTANT! Please read before starting
This air conditioning system meets strict safety and operating standards.
As the installer or service person, it is an important part of your job to install or service the
system so it operates safely and efficiently.
For safe installation and trouble-free operation, you must:
•
•
•
•
Carefully read this instruction booklet before beginning.
Follow each installation or repair step exactly as shown.
Observe all local, state, and national electrical codes.
Pay close attention to all danger, warning, and caution notices given in this manual.
WARNING: This symbol refers to a hazard or unsafe practice which can result in
severe personal injury or death.
CAUTION: This symbol refers to a hazard or unsafe practice which can result in
personal injury and the potential for product or property damage.
• Hazard alerting symbols
Electrical
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.
• Be sure to read this Manual thoroughly before installation.
• The warnings and precautions indicated in this Manual contain important information
pertaining to your safety. Be sure to observe them.
• Hand this Manual, together with the Operating Manual to the customer.
Request the customer to keep them on hand for future use, such as for relocating or
repairing the unit.
WARNING
Request your dealer or a professional installer to install the unit in accordance with
this Manual.
An improperly installed unit can cause serious accidents such as water leakage,
electric shock, or fire.
If the unit is installed in disregard of the instructions in the Installation Manual, it will
void the manufacturer’s warranty.
Do not turn ON the power until all work has been completed.
Turning ON the power before the work is completed can cause serious accidents
such as electric shock or fire.
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.
Safety/alert
If Necessary, Get Help
These instructions are all you need for most installation sites and maintenance conditions.
If you require help for a special problem, contact our sales/service outlet or your certified
dealer for additional instructions.
In Case of Improper Installation
Installation must be performed in accordance with the requirement of NEC(National
Electrical Code) and CEC(Canadian Electrical Code) by authorized personnel only.
Except for EMERGENCY, never turn off main as well as sub breaker of the indoor
units during operation. It will cause compressor failure as well as water leakage.
First, stop the indoor unit by operating the control unit, converter or external input
device and then cut the breaker. Make sure to operate through the control unit,
converter or external input device. When the breaker is designed, locate it at a place
where the users cannot start and stop in the daily work.
The manufacturer shall in no way be responsible for improper installation or maintenance
service, including failure to follow the instructions in this document.
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2. ABOUT THIS PRODUCT
For indoor side pipe joint (Small)
Coupler heat insulation
(Small)
2.1. Precautions for using the R410A refrigerant
WARNING
Do not introduce any substance other than the prescribed refrigerant into the
refrigeration cycle.
If air enters the refrigeration cycle, the pressure in the refrigeration cycle will become
abnormally high and cause the piping to rupture.
If there is a refrigerant leakage, make sure that it does not exceed the concentration
limit.
If a refrigerant leakage exceeds the concentration limit, it can lead to accidents such
as oxygen starvation.
Do not touch refrigerant that has leaked from the refrigerant pipe connections or other
area. Touching the refrigerant directly can cause frostbite.
1
Coupler heat insulation
(Large)
For indoor side pipe joint (Large)
1
For installing indoor unit.
Template (Carton top)
1
Washer
For installing indoor unit.
8
Drain hose insulation
For installing drain hose
If a refrigerant leakage occurs during operation, immediately vacate the premises and
thoroughly ventilate the area.
If the refrigerant comes in contact with a flame, it produces a toxic gas.
1
For installing drain pipe
(Ø 3/4 in [I.D.]; Ø 1-1/16 in [O.D.])
Drain hose
1
2.2. Special tool for R410A
Hose band
For installing drain hose
1
WARNING
To install a unit that uses the R410A refrigerant, use dedicated tools and piping
materials that have been manufactured specifically for R410A use.
Because the pressure of the R410A refrigerant is approximately 1.6 times higher
than the R22, failure to use dedicated piping material or improper installation can
cause rupture or injury.
Furthermore, it can cause serious accidents such as water leakage, electric shock,
or fire.
Tool name
Gauge manifold
Contents of change
Pressure is huge and cannot be measured with a conventional
(R22) gauge. To prevent erroneous mixing of other refrigerants,
the diameter of each port has been changed.
It is recommended to use a gauge manifold with a high pressure
display range 30 in Hg to 768 psi (–0.1 to 5.3 MPa) and a low
pressure display range 30 in Hg to 551 psi (–0.1 to 3.8 MPa).
Charging hose
To increase pressure resistance, the hose material and base
size were changed.
Vacuum pump
A conventional (R22) vacuum pump can be used by installing
a vacuum pump adapter. Be sure that the pump oil does not
backflow into the system. Use one capable for vacuum suction
of 5 Torr, –755 mm Hg (–100.7 kPa).
Gas leakage
detector
Special gas leakage detector for HFC refrigerant R410A.
For installing drain pipe
Drain pipe insulation
1
2.4. Optional parts
Description
Model
UTY-XWZXZC
UTY-XWZXZB
External connect kit
UTY-XWZXZD
UTY-XWZXZ7
UTY-XWZXZE
Insulation kit for high
humidity
UTZ-KXRA, UTZ-KXGA
(For indoor unit height
11-3/4 in (298 mm))
UTZ-KXGB
(For indoor unit height
10-1/16 in (256 mm))
Application
For output function
(Output terminal / CNB01)
For control input function
(Apply voltage terminal / CNA01)
For control input function
(Dry contact terminal / CNA02)
For forced thermostat off function
(Apply voltage terminal / CNA03)
For forced thermostat off function
(Dry contact terminal / CNA04)
Install when the condition under the
roof is over 80% in humidity and over
86 °F (30 °C) in temperature.
2.3. Accessories
2.5. About unit of the length
WARNING
For installation purposes, be sure to use the parts supplied by the manufacturer or
other prescribed parts.
The use of non-prescribed parts can cause serious accidents such as the unit to fall,
water leakage, electric shock, or fire.
The following installation parts are furnished. Use them as required.
Keep the Installation Manual in a safe place and do not discard any other
accessories until the installation work has been completed.
Name and Shape
Q’ty
Application
All Fujitsu General products are manufactured to metric units and tolerances. United
States customary units are provided for reference only. In cases where exact dimensions
and tolerances are required, always refer to metric units.
3. INSTALLATION WORK
Correct initial installation location is important because it is difficult to move unit after it is
installed.
3.1. Selecting an installation location
Operation manual
1
WARNING
(This book)
Installation manual
1
Cable tie (Large)
CAUTION
4
For fixing the connection
pipe (Large and Small)
2
For transmission and remote
controller cable binding.
Cable tie (Medium)
Select installation locations that can properly support the weight of the indoor. Install
the units securely so that they do not topple or fall.
Do not install the unit in the following areas:
• Area with high salt content, such as at the seaside.
It will deteriorate metal parts, causing the parts to fail or the unit to leak water.
• Area filled with mineral oil or containing a large amount of splashed oil or steam,
such as a kitchen.
It will deteriorate plastic parts, causing the parts to fail or the unit to leak water.
• Area that generates substances that adversely affect the equipment, such as sulfuric
gas, chlorine gas, acid, or alkali.
It will cause the copper pipes and brazed joints to corrode, which can cause
refrigerant leakage.
• Area that can cause combustible gas to leak, contains suspended carbon fibers or
flammable dust, or volatile inflammables such as paint thinner or gasoline.
If gas leaks and settles around the unit, it can cause a fire.
• Area where animals may urinate on the unit or ammonia may be generated.
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CAUTION
3.3. Installing the unit
Do not use the unit for special purposes, such as storing food, raising animals,
growing plants, or preserving precision devices or art objects.
It can degrade the quality of the preserved or stored objects.
Do not install where there is the danger of combustible gas leakage.
WARNING
Install the air conditioner in a location which can withstand a load of at least 5 times
the weight of the main unit and which will not amplify sound or vibration. If the
installation location is not strong enough, the indoor unit may fall and cause injuries.
(1) Positions of the ceiling opening, hanging bolt pitch, piping and ducts.
• Ceiling opening and hanging bolt pitch.
Unit: in (mm)
27-1/2 (699)
(Hanging bolt pitch)
31-5/16 (795) (Hanging bolt pitch)
5-1/8 (130)
Ceiling height is as shown in the figure.
11 in (256 mm) or more (AUUB 18/24)
12 in (298 mm) or more (AUUB 30/36)
13/16 to
1-3/4
(20 to 45)
33-1/16 (840) (Indoor unit)
(1) Install the indoor unit on a place having a sufficient strength so that it 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) A place from where the air can be distributed evenly throughout the room by the unit.
(5) Install the unit where connection to the outdoor unit (or RB unit) is easy.
(6) Install the unit where the connection pipe can be easily installed.
(7) Install the unit where the drain pipe can be easily installed.
(8) Install the unit where noise and vibrations are not amplified.
(9) Take servicing, etc., into consideration and leave the spaces. Also install the unit
where the filter can be removed.
3.2. Installation dimensions
33-7/8 to 35-13/16 (860 to 910)
(Ceiling opening)
13/16 to
1-3/4
(20 to 45)
1-15/16 (50)
60 in (1,500 mm) or more
5-1/8 (130)
7-7/8 (200)
Strong and durable ceiling
37-3/8 (950) (Cassette grille)
Decide the mounting position with the customer as follows:
37-3/8 (950) (Cassette grille)
33-7/8 to 35-13/16 (860 to 910)
(Ceiling opening)
13/16 to
1-3/4
(20 to 45)
33-1/16 (840) (Indoor unit)
Use the “Insulation kit for high humidity” (option), when the condition under the roof
is over 80% in humidity and over 86 °F (30 °C) in temperature. Otherwise, there is a
risk of condensation on the ceiling.
3.3.1. Position the ceiling hole and hanging bolts
13/16 to
1-3/4
(20 to 45)
If children under 10 years old may approach the unit, take preventive measures so
that they cannot reach the unit.
If the job is done with the panel frame only, there is a risk that the unit will come
loose. Please take care.
3-1/8 (80)
Install the indoor unit, power supply cable, transmission cable, and remote controller
cable at least 40 in (1 m) away from a television or radio receivers. The purpose of
this is to prevent TV reception interference or radio noise.
(Even if they are installed more than 40 in (1 m) apart, you could still receive noise
under some signal conditions.)
5-1/8 (130)
Do not install the unit near a source of heat, steam, or flammable gas.
Install the unit where drainage does not cause any trouble.
119 in (3,000 mm) or more
B
40 in (1,000 mm) or more
A
71 in (1,800 mm) to H
Obstruction
Floor
AUUB30
AUUB36
Standard mode
118 (3,000)
118 (3,000)
125 (3,200)
125 (3,200)
High Ceiling mode
137 (3,500)
137 (3,500)
141 (3,600)
165 (4,200)
* Be sure to make the function settings with the remote controller according to the
installed ceiling height.
Discharge Direction Setting
Model
B
9-11/16 (246)
10-1/16 (256)
AUUB 30/36
11-5/16 (288)
11-3/4 (298)
• Refrigerant piping and drain piping positions.
• The discharge direction can be selected as shown below.
Unit: in (mm)
3-1/8 (80)
3 Direction
3/8 (10)
* Select the most appropriate airflow direction from 3 or 4 directions according to the
shape of the room and the installation position.
* When changing the number of outlets, we recommend using the optional AIR
OUTLET SHUTTER PLATE KIT to close the outlet.
* For the specific closing pattern, please refer to the attached AIR OUTLET SHUTTER
PLATE KIT’S MANUAL. (Do so before installing the cassette grille as it will be
installed on the body.)
Drain pipe
(Connect the attached
drain hose)
10-15/16 (278)
14-1/8 (358)
Gas pipe
2-3/8 (60)
7-7/8
(200)
4 in (100 mm) or more
Liquid pipe
7-1/16 (180)
Drain pipe
5-1/2 (140)
4 Direction
A
AUUB 18/24
1-9/16 (40)
AUUB24
3/8 (10)
H [in (mm)]
AUUB18
1-15/16 to
3-15/16
(50 to 100)
Function setting
5-1/2 to
5-11/16
(140 to 145)
H: Maximum height from floor to ceiling
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3.3.2. Hanging preparations
• Distribution ducts and fresh air inlet positions.
Distribution duct connecting port
• Firmly fasten the hanging bolts as shown in the figure or by another method.
• Install the hanging bolts at a place where they would be capable of holding a weight of
at least 110 lbf (490 N) per bolt.
Distribution duct connecting port
Distribution duct connecting port
Fresh air inlet position
Hole-in anchor
Hole-in plug Concrete
Hanging bolt M10
(locally purchased)
Distribution duct connecting port
3.3.3. Body installation
• Detailed diagram of distribution duct connecting port (4 sides)
3-15/16 (100)
Unit: in (mm)
3-1/4 (83)
3-9/16 (90)
Cut out
(1) Install the attached washer and nut (prepared on site) onto the hanging bolt.
(2) Hook the body onto the hanging bolt.
7-5/16 (185)
3-15/16 (100)
3-1/4 (83)
Insert
(3) Adjust the dimensions of the ceiling surface from the body.
After installing the cassette grille, you can make fine adjustment of the height of the
body. For details, refer to the installation manual of the cassette grille.
WARNING
Perform final tightening by tightening the double nut firmly.
13-7/8 (352)
10 × Ø 1/8 (2.5) hole
Be sure to install the body horizontally and adjust the height below the body and the
ceiling surface properly.
(locally purchased)
Hanging bolt
• Fresh air inlet position
Ø 2-3/4 (70)
Cut out
7-5/16 (185)
Ø 3-7/16 (88)
Burling hole pitch
Unit: in (mm)
9-13/16 (250)
(locally purchased)
Nut A
(Accessories)
Washer
1-3/16 (30) or more
After installing the body,
tighten the nuts.
4 × Ø 1/8 (2.5) hole
NOTE:
Conduct proper insulation when connecting the distribution ducts and fresh air inlet.
Insulation
(Accessories)
Washer
Nut B (locally purchased)
(Double nut)
(10 to 15)
3/8 to 9/16
3.3.4. Leveling
• Using a level, or vinyl hose filled with water, fine adjust so that the body is level.
• Inclined installation so as the drain pipe side is higher may cause a malfunction of the
float switch, and may cause water leakage.
Drain pipe
Fresh air inlet position
* When sucking in the fresh air, please detach the insulation affixed to the drain pan.
(2) Setting the positions of hanging bolt and ceiling opening.
• Use an installation template (packaging top surface) to set the positions of the hanging
bolt and ceiling opening and drill holes.
Vinyl hoses
(3) Hanging structure.
• Select a strong structure for the hanging location.
• If necessary, reinforce the hanging bolt with quakeproof columnar support material to
prevent shaking.
• Use hanging bolts of M8 to M10.
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4.3. Flare connection (pipe connection)
4. PIPE INSTALLATION
WARNING
CAUTION
Be more careful that foreign matter (oil, water, etc.) does not enter the piping than
with refrigerant R410A models. Also, when storing the piping, securely seal the
openings by pinching, taping, etc.
While welding the pipes, be sure to blow dry nitrogen gas through them.
Tighten the flare nuts with a torque wrench using the specified tightening method.
Otherwise, the flare nuts could break after a prolonged period, causing refrigerant to
leak and generate hazardous gas if the refrigerant comes into contact with a flame.
4.3.1. Flaring
Use special flare tool exclusive for R410A.
4.1. Selecting the pipe material
(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 any burrs.
CAUTION
Do not use existing pipes from another refrigeration system or refrigerant.
Use pipes that have clean external and internal sides without any contamination
which may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or
water.
(3) Insert the flare nut (always use the flare nut attached to the indoor and outdoor units (or
RB unit) respectively) onto the pipe and perform the flare processing with a flare tool.
Use the special R410A flare tool. Leakage of refrigerant may result if other flare nuts
are used.
(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from
entering the pipes.
It is necessary to use seamless copper pipes.
Material : Phosphor deoxidized seamless copper pipes
It is desirable that the amount of residual oil is less than 0.04 oz/100 ft (40 mg/10 m).
Do not use copper pipes that have a collapsed, deformed, or discolored portion
(especially on the interior surface). Otherwise, the expansion valve or capillary tube
may become blocked with contaminants.
Die
A
• Never use copper pipes thinner than those indicated in the table even if they are
available on the market.
Thicknesses of Annealed Copper Pipes (R410A)
Pipe outside diameter
[in (mm)]
Dimension A [in (mm)]
0 (0)
Dimension B-0.015 (-0.4)
[in (mm)]
Flare tool for R410A, clutch
type
1/4 (6.35)
3/8 (9.1)
3/8 (9.52)
1/2 (13.2)
0 to 0.020
(0 to 0.5)
1/2 (12.70)
Pipe outside diameter [in (mm)]
Thickness [in (mm)]
5/8 (15.88)
1/4 (6.35)
0.032 (0.80)
3/8 (9.52)
0.032 (0.80)
3/4 (19.05)
1/2 (12.70)
5/8 (15.88)
3/4 (19.05)
0.032 (0.80)
0.039 (1.00)
0.047 (1.20)
5/8 (16.6)
3/4 (19.7)
15/16 (24.0)
When using conventional (R22) flare tools to flare R410A pipes, the dimension A should
be approximately 0.020 in (0.5 mm) more than indicated in the table (for flaring with
R410A flare tools) to achieve the specified flaring. Use a thickness gauge to measure the
dimension A. It is recommended that a R410A flaring tool is used.
Width across
flats
4.2. Pipe requirement
L
Pipe
Improper pipe selection will degrade performance. As an air conditioner using
R410A incurs pressure higher than when using conventional (R22) refrigerant, it is
necessary to choose adequate materials.
• Thicknesses of copper pipes used with R410A are as shown in the table.
Check if [L] is flared uniformly and
is not cracked or scratched.
B
Pipe outside diameter
[in (mm)]
Width across flats of
Flare nut [in (mm)]
1/4 (6.35)
11/16 (17)
3/8 (9.52)
7/8 (22)
CAUTION
Refer to the installation manual for the outdoor unit for description of allowable pipe
length and height difference.
1/2 (12.70)
1 (26)
5/8 (15.88)
1-1/8 (29)
3/4 (19.05)
1-7/16 (36)
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 248 °F (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 to 80 %, use heat insulation that is 9/16 in (15 mm)
or thicker and if the expected humidity exceeds 80 %, use heat insulation that is
13/16 in (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 68 °F (20 °C)).
4.3.2. Bending pipes
• If pipes are shaped by hand, 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 3 times.
CAUTION
To prevent breaking of the pipe, avoid sharp bends.
If the pipe is bent repeatedly at the same place, it will break.
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4.3.3. Pipe connection
5. INSTALLING DRAIN PIPES
CAUTION
Be sure to install the pipe against the port on the indoor unit and the outdoor unit
correctly. If the centering is improper, the flare nut cannot tightened smoothly. If the
flare nut is forced to turn, the threads will be damaged.
Do not remove the flare nut from the indoor unit pipe until immediately before
connecting the connection pipe.
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.
Hold the torque wrench at its grip, keeping it at a right angle with the pipe, in order to
tighten the flare nut correctly.
(1) Detach the caps and plugs from the pipes.
(2) Center the pipe against the port on the indoor unit, and then turn the flare nut by
hand.
Connection pipe (Gas)
WARNING
Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat
exchange erosion may occur)
Insulate the parts properly so that water will not drip from the connection parts.
Check for proper drainage after the construction by using the visible portion of
transparent drain port and the drain piping final outlet on the body.
CAUTION
Do not apply adhesive agent on the drain port of the body. (Use the attached drain
hose and connect the drain piping)
• Install the drain pipe with downward gradient (1/100 to 1/50) and so there are no rises
or traps in the pipe. Unsmooth draining caused by accumulated water flow in the pipe
may cause clogged drain.
• Use general hard polyvinyl chloride pipe (Ø 3/4 in [I.D.]; Ø 1-1/16 in [O.D.]).
Connection pipe
(Liquid)
• When the pipe is long, install supporters.
• Do not perform air bleeding. Drainage may be blown out.
• Always heat insulate the indoor side of the drain pipe.
• If it is impossible to have sufficient gradient of pipe, perform drain lift-up.
Pipe size
(3) 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. (See the table below for
the flare nut tightening torques.)
Ø 3/4 in [I.D.]; Ø 1-1/16 in [O.D.]
Drain pipe
Hanging fittings
60 to 78 in (1.5 to 2.0 m)
Tighten with 2 wrenches.
Holding wrench
Flare nut
Torque wrench
Ø 3/4 in [I.D.]; Ø 1-1/16 in [O.D.]
Downward gradient 1/100 to 1/50
Indoor unit pipe
(Body side)
PROHIBITED:
Connection pipe
Flare nut [in (mm)]
Tightening torque [lbf·ft (N·m)]
1/4 (6.35) dia.
11.8 to 13.3 (16 to 18)
3/8 (9.52) dia.
23.6 to 31.0 (32 to 42)
1/2 (12.70) dia.
36.1 to 45.0 (49 to 61)
5/8 (15.88) dia.
46.5 to 55.3 (63 to 75)
3/4 (19.05) dia.
66.4 to 81.1 (90 to 110)
Rise
• Height of inclined pipe should be less than 33 in (850 mm) from the ceiling. A rise
dimension over this range will cause leakage.
• Lift up the pipe vertically at the position of 11 in (300 mm) or less from the unit.
Downward gradient
11 in (300 mm) or less
1/100 to 1/50
CAUTION
After checking for gas leaks, insulate by wrapping insulation around the 2 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.
Cable tie (Large)
(Accessories)
33 in
(850 mm) or less
Horizontal or
upward gradient
After checking for gas leaks (refer to the Installation Manual of the outdoor unit),
perform this section.
Install heat insulation around both the large (gas) and small (liquid) pipes. Failure to
do so may cause water leaks.
Air bleeding
When lifting up drain:
Ø 3/4 in [I.D.];
Ø 1-1/16 in [O.D.]
local arrangement
4.4. Installing heat insulation
Trap
33 in (850 mm)
or less
Ø 1 in [I.D.]; Ø 1-5/16 in [O.D.] or more
Downward gradient 1/100 to 1/50
Coupler heat
insulation
(Accessories)
No gap
Body
Be sure to overlap
the insulation
Coupler heat
insulation
CAUTION
Must fit tightly against body without any gap.
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Working procedure
(1) Install the attached drain hose to the drain port of the body. Install the hose band from
the top of the hose within the graphic display area. Secure firmly with the hose band.
(2) Use vinyl adhesive agent to glue the drain piping (PVC pipe (Ø 3/4 in [I.D.]; Ø 1-1/16
in [O.D.])) which is prepared on site or elbow socket.
(Apply color adhesive agent evenly until the gauge line and seal)
(4) Install the heat insulation.
(5) Use the attached heat insulation to insulate the drain port and band parts of the body.
Attached hose band
(Accessories)
Attached drain hose
heat insulation
(Accessories)
WARNING
Electrical work must be performed in accordance with this Manual by a person
certified under the national or regional regulations. Be sure to use a dedicated circuit
for the unit.
An insufficient power supply circuit or improperly performed electrical work can cause
serious accidents such as electric shock or fire.
(3) Check the drainage. (See separate diagram)
Install the knob
faces upward
6. ELECTRICAL WIRING
Locally arranged
vinyl pipe
Before starting work, check that power is not being supplied to the all units.
For wiring, use the prescribed type of cables, connect them securely, making sure
that there are no external forces of the cables applied to the terminal connections.
Improperly connected or secured cables can cause serious accidents such as
overheating the terminals, electric shock, or fire.
Securely install the electrical box cover on the unit.
An improperly installed electrical box cover can cause serious accidents such as
electric shock or fire through exposure to dust or water.
Attached drain hose
(Accessories)
Attached heat insulation
(Accessories)
Install sleeves into any holes made in the walls for wiring. Otherwise, a short circuit
could result.
Use the included connection cables and power cables or ones specified by the
manufacturer. Improper connections, insufficient insulation, or exceeding the
allowable current can cause electric shock or fire.
Do not modify the power cables, use extension cables, or use any branches in the
wiring. Improper connections, insufficient insulation, or exceeding the allowable
current can cause electric shock or fire.
Match the terminal block numbers and connection cable colors with those of the
outdoor unit (or RB unit). Erroneous wiring may cause burning of the electric parts.
Securely connect the connection cables to the terminal board. In addition, secure the
cables with wiring holders. Improper connections, either in the wiring or at the ends
of the wiring, can cause a malfunction, electric shock, or fire.
(a) Top view
(b) Side view
Ø 3/4 in [I.D.];
Ø 1-1/16 in [O.D.]
Applying area
of adhesive
1-3/8 in
(35 mm)
Hose Band
Always fasten the outside covering of the connection cable with the cable clamp. (If
the insulator is chafed, electric discharge may occur.)
We suggest installing GFEB breakers or follow local electrical code. When installing
this system, install using ground fault equipment breakers (GFEB) to reduce the risk
of leaking current which result in electric shock or potential fire.
Always connect the earth (ground) cable.
Improper earthing (grounding) work can cause electric shocks.
Install the remote controller cables so as not to be direct touched with your hand.
Perform wiring work in accordance with standards so that the air conditioner can be
operated safely and positively.
3/16 to 3/8 in
(5 to 10 mm)
Gauge line
3/16 in (4 mm) or less
If the supply cable is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualified persons in order to avoid a hazard.
13/16 in
(20 mm)
(c) Top view
Connect the connection cable firmly to the terminal board. Imperfect installation may
cause a fire.
(d) Hose opening view
Wind the attached heat insulation
around the hose band
Make sure the
alignment is on top
CAUTION
Earth (Ground) the unit.
Do not connect the earth (ground) cable to a gas pipe, water pipe, lightning rod, or a
telephone earth (ground) cable.
Improper earthing (grounding) may cause electric shock.
Do not connect power supply cables to the transmission or remote controller terminals,
as this will damage the product.
Make sure there are no gaps
NOTE: Check for drainage
Pour about 1 liter of water from the position shown in the diagram or from the airflow
outlet to the dew tray. Check for any abnormalities such as strange noises and whether
the drain pump functions normally.
Never bundle the power supply cable and transmission cable, remote control cable
together. Separate these cable by 2 in (50 mm) or more. Bundling these cables together
will cause miss operation or breakdown.
When handling PCB, static electricity charged in the body may cause malfunction of the
PCB. Follow the cautions below:
• Establish an earth (ground) for the indoor and outdoor units and peripheral devices.
• Cut power (breaker) off.
• Touch metal part of the indoor units for more than 10 seconds to discharge static
electricity charged in the body.
• Do not touch terminals of parts and patterns implemented on PCB.
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6.1. Electrical requirement
6.2. Wiring method
Voltage rating
Operating range
208/230 V
187 to 253 V
• Select the power cable type and size in accordance with relevant local and national
regulations.
• Specifications for local wiring power cord and branch wiring are in compliance with local
code.
• Select the correct cable type and size according to the country or region’s regulations.
• Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the wire
diameter when the wire length is long.
Breaker should be installed at every refrigerant system. Do not use a breaker in a different
refrigerant system.
Refer to the table for the breaker specifications of each installation condition. Perform
the power crossover wiring within the range of the same refrigerant system. When the
crossover wiring is done, make a connection for indoor units to satisfy conditions A and B
below.
A. Current breaker requirements
Model
AUUB18TLAV
AUUB24TLAV
AUUB30TLAV
AUUB36TLAV
MCA
0.43 A
0.43 A
0.68 A
0.68 A
MAX. CKT. BKR (Fuse capacity)
15 A
EXAMPLE
Outdoor unit or RB unit *1
Breaker 1: Ground Fault Equipment
Breaker (GFEB)
Breaker 2: Maximum Circuit Breaker
(MAX. CKT. BKR)
Transmission
Indoor unit
Indoor unit
Remote
control
*2
Transmission
Power supply
Indoor unit
*2
*2
Breaker2
Breaker2
Breaker2
Breaker1
Breaker1
Breaker1
Power supply
Remote controller
(Master)
Remote controller
(Slave)
Remote controller
Breaker shall be located in sight from and readily accessible from all indoor units.
MCA: Minimum Circuit Ampacity
MAX. CKT. BKR : Maximum Circuit Breaker
*1: When connecting to the Heat Recovery System, refer to the installation manual of the
RB unit.
*2: When connecting the 2-wire type remote controller, Y3 is not used.
When the power crossover wiring is done, make it so that the total of the MCA of the
connected RB units and indoor units does not exceed the 11 A. For RB unit MCA, refer to
the RB unit installation manual.
If the capacity of connected RB units and indoor units exceeds the upper limit, either add
breakers or use a breaker with a greater capacity.
(Crossover wiring of power supply)
Indoor unit
Indoor unit
Power supply
Indoor unit
Power supply
Power supply
B. Ground Fault Equipment Breaker requirements
Breaker capacity
* Maximum connectable “indoor units”
or “indoor units + RB units”
30 mA, 0.1 sec or less
36 or less **
100 mA, 0.1 sec or less
37 to 121
Pull box
Breaker2
* Heat pump type: indoor units, Heat recovery type: indoor units and RB units.
** If the total number of units connected to the breaker exceeds 36, either add a 30mA
breaker, or use breakers with a greater capacity.
Pull box
Breaker1
: Disconnect switch
Power supply
Disconnect switch shall be installed between indoor unit and pull box.
6.1.1. Cable specifications
Recommended
cable size
Transmission cable
Remote controller
cable (2-wire type)
Remote controller
cable (3-wire type)
22 AWG
(0.33 mm²)
22 AWG to 16 AWG
(0.33 mm² to 1.25 mm²)
18AWG
22 AWG
(0.33 mm²)
Cable type
LONWORKS
compatible cable
Sheathed PVC
cable
Thermostat cable
2 core
Sheathed PVC
cable
Remark
22 AWG LEVEL 4
(NEMA)
non-polar 2 core,
twisted pair solid core
diameter 0.026 in
(0.65 mm)
Non polar 2 core,
twisted pair
Use sheathed non
twisted pair cable
Polar 3 core
6.3. Unit wiring
• Before attaching the cable to terminal block.
6.3.1. Power supply cable
7-1/16 in (180 mm)
Earth (ground)
wire
Conduit connector
7-1/16 in (180 mm)
A. For solid core wiring
(1) To connect the electrical terminal, follow the below diagram and connect after looping
it around the end of the cable.
(2) Use the specified cables, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(3) Use an appropriate screwdriver to tighten the terminal screws.
Do not use a screwdriver that is too small, otherwise, the screw heads may be
damaged and prevent the screws from being properly tightened.
(4) Do not tighten the terminal screws too much, otherwise, the screws may break.
(5) See the table for the terminal screw tightening torques.
(6) Please do not fix 2 power supply cables with 1 screw.
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Strip 1 in
(25 mm)
• When the 2 cables are attached:
GOOD
PROHIBITED
Loop
Screw with
special washer
Cable
Screw with
special washer
Cable end (Loop)
Different diameter
Connect to 1 side
Cable end (Loop)
WARNING
Terminal block
Cable
Tighten the terminal screws to the specified torques, otherwise, abnormal
overheating may be produced and possibly cause heavy damage inside the unit.
Do not apply branch wiring. It may result electric shock or fire.
Tightening torque
WARNING
When using solid core cables, do not use the ring terminal. If you use the solid core
cables with the ring terminal, the ring terminal's pressure bonding may malfunction
and cause the cables to abnormally heat up.
M3 screw
(Transmission / X1, X2)
(Remote controller / Y1, Y2, Y3)
4 to 5 lbf·in
(0.5 to 0.6 N·m)
CAUTION
B. For strand wiring
(1) Use ring terminals with insulating sleeves as shown in the figure below to connect to
the terminal block.
(2) Securely clamp the ring terminals to the cables using an appropriate tool so that the
cables do not come loose.
(3) Use the specified cables, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws.
Do not use a screwdriver that is too small, otherwise, the screw heads may be
damaged and prevent the screws from being properly tightened.
To peel the film from the lead cable, use a dedicated tool that will not damage the
conductor cable.
When installing a screw on the terminal block, do not cut the cable by overtightening
the screw. On the other hand, an undertightened screw can cause faulty contact,
which will lead to a communication failure.
6.4. Connection of wiring
(1) Remove the control box cover and install each connection cable.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table for the terminal screw tightening torques.
Attach the conduit connector on
the wiring connecting port.
(The grommet edging and the
connection cable clamp are not
used.)
(7) Please do not fix 2 power supply cables with 1 screw.
Strip 3/8 in
Ring terminal
(10 mm)
Conduit connector
Sleeve
Screw with
special washer
Cable
Lock nut
Screw with
special washer
* Wiring connecting port
Ring terminal
For putting through the
power supply cable.
Ring terminal
Connection cable clamp
Terminal block
Cable
WARNING
Use ring terminals and tighten the terminal screws to the specified torques,
otherwise, abnormal overheating may be produced and possibly cause heavy
damage inside the unit.
1 Wiring cover
Tightening torque
M4 screw
(Power supply / L1, L2 (N), GND)
11 to 16 lbf·in
(1.2 to 1.8 N·m)
6.3.2. Transmission and Remote controller cable
Transmission cable
1-3/16 in (30 mm)
Power terminal board
2 Control box cover
Transmission cable and Remote
controller terminal board
Shielded wire
(no film)
1-9/16 in (40 mm)
For putting through the transmission
cable and the remote controller cable.
Remote controller cable
For 3-wire type
1-3/16 in (30 mm)
* Remote controller connecting port
For 2-wire type
1-3/16 in (30 mm)
* Fill the wiring connecting port and remote controller connecting port with putty
or heat insulation so that insects or dust will not enter the unit.
(2) Please firmly tighten Connection cable and Remote controller cable with the attached
cable tie.
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CAUTION
6.5. External input and external output (Optional parts)
When switching the DIP switch (SW1), be sure to turn off the power supply to the
indoor unit. Otherwise, the PC board of the indoor unit may be damaged.
CAUTION
Do not operate any switches other than prescribed, as it can cause the unit to operate
improperly or malfunction.
Use an insulated screwdriver to set the DIP switches.
Controller PCB
Lock nut
DIP switch
(SET 2)
Apply voltage terminal
Conduit connector
(L1, L2 (N): Power
supply cable)
(CNA03)
OFF ON
SW1
SW2
SW3
SW4
(CNA01)
Earth (Ground)
Output terminal
(CNB01)
(CNA02)
Dry contact terminal
(CNA04)
(1) External input
• Indoor unit can be Operation/Stop, Emergency stop or Forced stop by using indoor unit
PCB CNA01 or CNA02.
• “Operation/Stop” mode, “Emergency stop” mode or “Forced stop” mode can be selected
with function setting of indoor unit.
• Indoor unit can be Forced thermostat off by using indoor unit PCB CNA03 or CNA04.
• A twisted pair cable (22 AWG) should be used. Maximum length of cable is 492 ft (150 m).
• Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.
• The wire connection should be separate from the power cable line.
X1, X2:
Transmission cable
Cable tie (Medium)
(Accessories)
Input select
Use either one of these types of terminal according to the application. (Both types of
terminals cannot be used simultaneously.)
Y1,Y2,Y3:
Remote controller
cable
● Apply voltage terminal ([CNA01], [CNA03])
2WIRE
For 3-wire type
Connect the remote
controller cable
Y1: Non-polar
Y2: Non-polar
Y3: Do not connect *1
Y1: Red
Y2: White
Y3: Black
Set the DIP switch (SW1)
2WIRE (Factory setting)
3WIRE
*1: If you connect the remote controller cable to the terminal Y3, 2-wire type
remote controller does not work.
(3) Install the wiring cover and control box cover.
DC power supply *1
12 to 24V
Input
device 1
For 2-wire type
3WIRE
Load
resistance
*a
Input
device 2
SW1
Load
resistance
*a
Input
device 3
DIP switch (SW1)
When a power supply must be provided at the input device you want to connect, use the
Apply voltage terminal ([CNA01], [CNA03]).
Load
resistance
*a
P.C.B
CNA01
*b
CNA03
connected unit
*1 Make the power supply DC12 to 24V. Select a power supply capacity with an ample
surplus for the connected load.
Do not impress a voltage exceeding 24V across pins 1-2, and 1-3.
*a The allowable current is DC 5mA to 10mA. (Recommended: DC5mA)
Provide a load resistance such that the current becomes DC10mA or less.
Select very low current use contacts (usable at DC12V, DC1mA or less).
*b The polarity is [+] for pin 1 and [-] for pin 2 and 3. Connect correctly.
Supporter
CNA01
P.C.B
CNA01
connected unit
P.C.B
Indoor unit
CNA01
30 in
(756 mm)
or less
54 in
(1,361 mm)
or less
54 in
(1,361 mm)
or less
Indoor unit
Conduit (Power supply cable)
Load
resistance
P.C.B
Indoor unit
• Fix the conduit with the supporters as shown below.
Input
device 1
Do not bundle the remote controller cable, or wire the remote controller cable in
parallel, with the indoor unit connection wire (to the outdoor unit) and the power
supply cable. It may cause erroneous operation.
Load
resistance
Input
device 2
DC power supply
12 to 24V
CAUTION
Indoor unit
When connected to Apply voltage terminals of multiple indoor units with a connected unit,
be sure to make a branch outside the indoor unit using a pull box, etc. as shown on below
example.
54 in
(1,361 mm)
or less
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[In the case of “Pulse” input]
● Dry contact terminal ([CNA02], [CNA04])
When a power supply is unnecessary at the input device you want to connect, use the Dry
contact terminal ([CNA02], [CNA04]).
P.C.B
Connector
Input signal
Command
Ch1
OFF → ON
Emergency stop
Ch2
OFF → ON
Normal
CNA01 or CNA02
CNA02
*c
*c
Ch 1
Ch 2
GND
* All indoor units of same refrigerant system stops when Emergency stop operates.
*d
CNA04
● When function setting is “Forced stop” mode.
[In the case of “Edge” input]
Connector
Input signal
connected unit
*c Select very low current use contacts (usable at DC12V, DC1mA or less).
*d The wiring is different from Apply voltage terminals. Be sufficiently careful when wiring.
When connected to Dry contact terminals of multiple indoor units with a connected unit,
insulate each indoor unit with relay, etc. as shown on below example.
K5
Indoor unit
Indoor unit
P.C.B
K2
CNA02
P.C.B
K3
Input device 1
Normal
Input signal
Command
Ch1
OFF → ON
Forced stop
Ch2
OFF → ON
Normal
CNA01 or CNA02
* When the forced stop is triggered, indoor unit stops and Operation/Stop operation by a
remote controller is restricted.
Indoor unit
Power supply for relay
CNA02
ON → OFF
[In the case of “Pulse” input]
Connector
K4
Forced stop
Ch1 of CNA01 or CNA02
P.C.B
K1
Command
OFF → ON
K6
CNA02
Input device 2
K1 to K6: Relay
(Device for DC Current)
* When forced stop function is used with forming a remote controller group, connect the
same equipment to each indoor unit within the group.
• Selection method of functions
“Operation/Stop” mode or “Emergency stop” mode, “Forced stop” mode can be selected
with function setting of indoor unit.
● Forced thermostat off function
[“Edge” input only]
*If function setting "60" is set to "00"
Connector
Input signal
Command
OFF → ON
Thermostat off
ON → OFF
Normal
Ch3 of CNA03 or CNA04
NOTE :
When connected to multiple indoor units directly, it will cause breakdown.
Operation behavior
Edge
● Input signal type
The input signal type can be selected.
It is switched by DIP switch on the indoor unit PCB.
DIP switch [Set 2 SW2]
Pulse
Input signal type
OFF (Factory setting)
Edge
ON
Pulse
The width of pulse
must be longer than
200msec.
(2) External output
• A twisted pair cable (22AWG) should be used. Maximum length of cable is 82 ft (25 m).
• Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.
• Output voltage: Hi DC12V±2V, Lo 0V.
• Permissible current: 50mA
Output select
● When indicator etc. are connected directly
P.C.B
● When function setting is “Operation/Stop” mode.
[In the case of “Edge” input]
Connector
Indicator 1
Input signal
Command
OFF → ON
Operation
ON → OFF
Stop
CNB
01
Indicator 2
Ch1 of CNA01 or CNA02
Indicator 3
[In the case of “Pulse” input]
Connector
Indicator 4
Input signal
Command
Ch1
OFF → ON
Operation
Ch2
OFF → ON
Stop
CNA01 or CNA02
* The last command has priority.
* The indoor units within the same remote controller group operates in the same mode.
● When function setting is “Emergency stop” mode.
● When connecting with unit equipped with a power supply
P.C.B
Connected
device 1
Connected
device 2
CNB
01
Connected
device 3
[In the case of “Edge” input]
Connector
connected unit
Input signal
Command
OFF → ON
Emergency stop
ON → OFF
Normal
Ch1 of CNA01 or CNA02
Connected
device 4
Connected unit
Relay (locally purchased)
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Operation behavior
7.1. Setting the address
*If function setting "60" is set to "00"
Connector
Output voltage
External output1
Pins 1-2
External output2
Pins 1-3
CNB01
External output3
Pins 1-4
External output4
Pins 1-5
0V
• Remove the cover referring to the below Fig. A. Fix the cover after addressing setting.
Status
Fig. A
Stop
DC 12 V
Operation
0V
Normal
DC 12 V
Error
0V
Indoor unit fan stop
DC 12 V
Indoor unit fan operation
0V
External heater OFF
DC 12V
External heater ON
Screw
● Indoor unit fan setting for external heater
Cover
Fan setting when turning ON output to the connected external heater can be set by
changing Dip switch on PC board.
Dip switch
[SET2 SW3]
Fan setting when
ON is output to the
external heater
OFF
(Factory setting)
OFF
ON
ON
Explanation
Rotary switch Example: “0”
For the fan setting details, see the
Design & Technical Manual.
(3) Connection methods
• Wire modification
Remove insulation from wire attached to wire kit connector.
Remove insulation from locally purchased cable. Use crimp type insulated butt
connector to join field cable and wire kit wire.
Connect the wire with connecting wire with solder.
IMPORTANT: Be sure to insulate the connection between the wires.
Optional parts
External input /output wire
Locally purchased
Rotary switch
Example: “0”
Setting
Solder and insulate the connected parts.
Setting range
Type of switch
• Connection terminals and wiring arrangement
Indoor unit
address
In following figure, all the possible connectors are connected for description.
In actual installation, you cannot connect all the connectors at once.
Cable tie (locally purchased):
Bind to the transmission cable
0 to 63
Setting
example 2
hook
Refrigerant
circuit address
0 to 99
IU AD × 10
IU AD × 1
REF AD × 10
REF AD × 1
Setting
example
63
(1) Indoor unit address
Rotary switch (IU AD × 1)...Factory setting “0”
Rotary switch (IU AD × 10)...Factory setting “0”
When connecting multiple indoor units to 1 refrigerant system, set the address at IU
AD SW as shown in the Table A.
(2) Refrigerant circuit address
Transmission cable
CNB01
CNA01
CNA03 CNA02
CNA04
7. FIELD SETTING
There are 3 methods for address setting by FIELD SETTING as follows.
Set by either of the methods.
Each setting method is described (1) to (3) below.
(1) IU AD, REF AD SW settings ............. This section (7.1. Setting the address)
(2) Remote controller settings ............... Refer to the wired or wireless remote controller
manual for detailed setting information. (Set IU
AD, REF AD SW to 0)
(3) Automatic address settings ............. Refer to the outdoor unit manual for detailed
setting information. (Set IU AD, REF AD SW to 0)
Rotary switch (IU AD × 1)...Factory setting “0”
Rotary switch (IU AD × 10)...Factory setting “0”
In the case of multiple refrigerant systems, set REF AD SW as shown in the Table
A for each refrigerant system.
Set to the same refrigerant circuit address as the outdoor unit.
• If working in an environment where the wireless remote controller can be used, the
addresses can also be set using the remote controller.
• If setting the addresses using the wireless remote controller, set the indoor unit
address and refrigerant circuit address to “00”.
(For information on setting using the wireless remote controller.)
CAUTION
Be sure to turn OFF the power before performing the field setting.
Do not operate any switches other than prescribed, as it can cause the unit to operate
improperly or malfunction.
Use an insulated screwdriver to set the DIP switches.
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Custom code setting for indoor unit
Table A
Rotary Switch
Setting
Address
Address
REF AD SW
Rotary Switch Setting
IU AD SW
Refrigerant
circuit
× 10
×1
× 10
×1
0
1
2
3
4
5
6
7
8
9
10
11
12
.
.
.
0
0
0
0
0
0
0
0
0
0
1
1
1
.
.
.
0
1
2
3
4
5
6
7
8
9
0
1
2
.
.
.
0
1
2
3
4
5
6
7
8
9
10
11
12
.
.
.
0
0
0
0
0
0
0
0
0
0
1
1
1
.
.
.
0
1
2
3
4
5
6
7
8
9
0
1
2
.
.
.
99
9
9
63
6
3
Indoor unit
Do not set the indoor unit address (IU AD SW) at 64 to 99.
It may result in failure.
(3) Remote controller address
i) 3-wire type
Rotary switch (RC AD SW)...Factory setting “0”
When connecting multiple indoor units to 1 standard wired remote controller, set the
address at RC AD SW in sequence from 0.
Setting
Setting range
Remote controller
address
Type of switch
Setting
example
0
0 to 15
RC AD
Example
Set the DIP switch SET 3 SW1, SW2, referring to the Table B.
If 4 indoor units are connected.
Indoor unit
Indoor unit
Indoor unit
Indoor unit
RC AD SW
0
RC AD SW
1
RC AD SW
2
RC AD SW
3
ON
DIP switch “SET 3”
OFF
SW SW SW SW
1
2
3
4
Table B
DIP switch SET 3 SW1
DIP switch SET 3 SW2
RC AD SW
Address
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
RC AD SW
Address
8
8
9
9
A
10
B
11
C
12
D
13
E
14
F
15
ii) 2-wire type
Rotary switch (RC AD SW)...Factory setting “0”
Since the remote controller address settings are automatically configured, you do not
need to configure them.
If configuring manually, it is necessary to configure both the indoor unit and the remote
controller. For details, please refer to the remote controller manual.
Indoor
unit
Remote
controller
Confusion
D
ON
ON
• FUNCTION SETTING can be performed with the wired or wireless remote controller.
(The remote controller is optional equipment)
• Refer to the wired or wireless remote controller manual for detailed setting information.
• Refer to “7.1. Setting the address” for indoor unit address and refrigerant circuit address settings.
• Turn the power of the indoor unit ON before starting the setting.
* Turning on the power to the indoor units initializes EEV, so make sure the piping air
tight test and vacuuming have been conducted before turning on the power.
* Also check again to make sure no wiring mistakes were made before turning on the
power.
Filter indicator interval
Code change
C
OFF
ON
Function details
Remote
controller
Selecting the custom code prevents the indoor unit mix-up.
(Up to 4 codes can be set.)
Perform the setting for both the indoor unit and the remote controller.
Custom code
B
ON
OFF
7.3. Function setting
Function
7.2. Custom code setting
A (Factory setting)
OFF
OFF
Filter indicator action
Function
number
11
13
Ceiling
airflow
20
Vertical
airflow
direction
23
Cool air
temperature
trigger
Heat air
temperature
trigger
Auto restart
30
31
Setting number
00
Standard
01
Longer
02
Shorter
00
Enable
01
Disable
02
Display only on
central remote
controller
00
Standard
01
High Ceiling
00
Standard
01
Raise
00
Standard
01
Adjust (1)
02
Adjust (2)
00
Standard
01
Adjust (1)
02
Adjust (2)
03
Adjust (3)
00
Enable
01
Disable
Default
Details
○
Adjust the filter cleaning interval
notification. If the notification
is too early, change to setting
01. If the notification is too late,
change to setting 02.
○
Enable or disable the filter indicator. Setting 02 is for use with
a central remote controller.
○
Regulate the airflow according
to the needs of the installation
location. When set to 01, the air
flow will be stronger. (Cassette
type only)
○
Adjust the vertical airflow direction. All airflow direction louvers
are adjusted together.
(Cassette type only)
○
Adjust the cool air trigger temperature. To lower the trigger
temperature, use setting 01. To
raise the trigger temperature,
use setting 02.
○
Adjust the heat air trigger temperature. To lower the trigger
temperature by 11 degrees F (6
degrees C), use setting 01. To
lower the trigger temperature by
7 degrees F (4 degrees C), use
setting 02. To raise the trigger
temperature, use setting 03.
40
○
Enable or disable automatic
system restart after a power
outage.
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Function
Function
number
Setting number
00 Super low
Cool Air
Prevention
External
control
Error report
target
Fan setting
when cooling
thermostat
OFF
Switching
functions
for external
inputs and
external
outputs
terminals
43
00
Start/Stop
01
Emergency stop
02
Forced stop
○
Allow an external controller to
start or stop the system, or to
perform an emergency stop.
* If an emergency stop is
performed from an external
controller, all refrigerant
systems will be disabled.
49
* If forced stop is set, indoor
unit stops by the input to
the external input terminals,
and Start/Stop by a remote
controller is restricted.
○
00
All
01
Display only on
central remote
controller
Follow the setting
00 on the remote
controller
60
00
01
02
03
04
05
06
07
08
02
61
03
04
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
Mode 6
Mode 7
Mode 8
Auxiliary heater
control 1
Auxiliary heater
control 2
Heat pump prohibition control
Heater selection
control using
outdoor temperature 1
Heater selection
control using
outdoor temperature 2
○
01 Setting 1
62
○
02 Setting 2
03 Setting 3
04 Setting 4
05 Setting 5
When set to 01, the fan stops
when the thermostat is OFF in
cooling operation. Connection
of the wired remote controller
(2-wire type or 3-wire type)
and switching its thermistor are
necessary.
• Set this function when connecting the VRF system to a ventilator, economizer, humidifier, or
other external device.
• The connection terminal functions can be changed depending on the type of external
device. For details of the connection terminal functions, see
the Design & Technical Manual.
Sets the control method for the
external heater being used. For
details of the control method,
see the Design & Technical
Manual.
• Sets the temperature conditions
when the external heater is ON.
• For the temperature conditions,
see "Temperature conditions
when the external heater is
ON". For a more detailed
explanation, see the Design &
Technical Manual.
Temperature conditions when the external heater is ON
Temperature (t) when the external heater is ON= Room temperature - set temperature
Set value of function: 61
Set value of function: 62
00
00
01
t < -5.4°F (-3°C)
lamp (Red)
TIMER indicator
lamp (Orange)
Change the target for reporting errors. Errors can either be
reported in all locations, or only
on the central remote controller.
○
○
00 Setting 0
FILTER indicator
OPERATION indicator
lamp (Green)
MANUAL AUTO
01 Stop
01
Operating
temperature
switching
of external
heaters
Restrain the cold airflow with
making the airflow lower when
starting heating operation. To
correspond to the ventilation,
set to 01.
46
47
7.3.1. Button name and function
Details
○
Follow the setting
01 on the remote
controller
00
Control
switching
of external
heaters
Default
02
03
t ≤ -0.9°F (-0.5°C)
01
t < -3.6°F (-2°C)
t ≤ -1.8°F (-1°C)
02
t < -3.6°F (-2°C)
t ≤ -3.6°F (-2°C)
03
t < -5.4°F (-3°C)
t ≤ -5.4°F (-3°C)
04
t < -7.2°F (-4°C)
t ≤ -7.2°F (-4°C)
05
t < -9.0°F (-5°C)
t ≤ -9.0°F (-5°C)
04
button
(Optional)
7.3.2. Checking the function settings
• Press and hold the “MANUAL AUTO” button on the indoor unit for 3 seconds to check
the function settings. It is necessary to disconnect the power in order to return to
normal operation mode.
(1) Indoor unit and refrigerant address indication
Indication pattern
Indication pattern
Indoor unit address
Refrigerant address
Indicator name
OPERATION indicator lamp
ON
Flash (1.0s ON/1.0s OFF)
(Green)
TIMER indicator lamp (Orange) Address: tens place (0.5s ON/0.5s OFF)
FILTER indicator
Address: ones place (0.5s ON/0.5s OFF)
lamp (Red)
• Indoor unit address example
(Example) ADDRESS : 24
1 cycle 12 sec
OPERATION
indicator lamp
(Green)
TIMER
indicator lamp
(Orange)
FILTER
indicator lamp
(Red)
ON
ON
OFF
ON
0.5s 0.5s 0.5s 0.5s
OFF
ON
10 sec
0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s
OFF
8 sec
• Refrigerant address example
(Example) ADDRESS : 30
1 cycle 12 sec
OPERATION
indicator lamp
(Green)
TIMER
indicator lamp
(Orange)
FILTER
indicator lamp
(Red)
ON
OFF
ON
OFF
ON
1.0s
1.0s
1.0s
1.0s
0.5s 0.5s 0.5s 0.5s 0.5s 0.5s
1.0s
1.0s
1.0s
9 sec
OFF
OFF
• Setting details
Function number
Item
Setting number
01
Indoor unit address
00 to 63
02
Refrigeration address
00 to 99
For use with a remote controller, set all rotary switches to 0, and refer to “7.1. Setting the
address” for details.
All switches are set to 0 at the factory.
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(2) Others
11. ERROR CODES
Indication pattern
Indicator Name
OPERATION indicator lamp (Green)
TIMER indicator lamp (Orange)
FILTER indicator lamp (Red)
Indication pattern
Function number; tens place (0.5s ON/0.5s OFF)
Function number; ones place (0.5s ON/0.5s OFF)
Setting number: (0 to 9) (0.5s ON/0.5s OFF)
If you use a wired type remote controller, error codes will appear on the remote controller
display. If you use a wireless remote controller, the lamp on the photodetector unit will
output error codes by way of blinking patterns. See the lamp blinking patterns and error
codes in the table below.
Error indications
(Example) Function : 31, Setting number : 2
OPERATION
lamp (green)
1 cycle 12 sec
OPERATION
indicator lamp
(Green)
TIMER
indicator lamp
(Orange)
FILTER
indicator lamp
(Red)
ON
OFF
ON
OFF
ON
OFF
0.5s 0.5s 0.5s 0.5s 0.5s 0.5s
9 sec
0.5s 0.5s
11 sec
0.5s 0.5s 0.5s 0.5s
10 sec
TIMER
lamp
(orange)
Wired
Remote
FILTER
Controller
lamp (red) Error CODE
Error contents
(1)
(2)
Remote controller communication
error
(1)
(4)
Network communication error
(1)
(6)
Peripheral unit communication
error
(2)
(6)
Indoor unit address setting error
(2)
(9)
Connection unit number error in
wired remote controller system
(3)
(1)
Indoor unit power supply abnormal
(3)
(2)
Indoor unit main PCB error
(3)
(10)
Indoor unit communication circuit
(wired remote controller) error
(4)
(1)
Indoor unit room temp. thermistor
error
(4)
(2)
Indoor unit heat ex. temp.
thermistor error
(5)
(1)
Indoor unit fan motor 1 error
(5)
(2)
Indoor unit coil (expansion valve)
error
(5)
(3)
Indoor unit water drain abnormal
(9)
(15)
Outdoor unit miscellaneous error
(13)
(1)
RB unit error
8. CASSETTE GRILLE INSTALLATION
• Operate according to the installation Manual CASSETTE GRILLE.
• Be sure to confirm there is no gap between the cassette grille and main unit after
installing the CASSETTE GRILLE.
9. TEST RUN
9.1. Test run using Outdoor unit (PCB)
• Refer to the Installation Manual for the outdoor unit if the PCB for the outdoor unit is to
be used for the test run.
9.2. Test run using Remote Controller
• Refer to the Installation Manual for the remote controller to perform the test run using
the remote controller.
• When the air conditioner is being test run, the OPERATION and TIMER indicators
flash slowly at the same time.
10. CHECK LIST
Pay special attention to the check items below when installing the indoor unit(s).
After installation is complete, be sure to check the following check items again.
CHECK ITEMS
If not performed correctly
Has the indoor unit been installed
correctly?
Vibration, noise, indoor unit may
drop
Has there been a check for gas leaks
(refrigerant pipes)?
No cooling, No heating
Has heat insulation work been
completed?
Water leakage
Does water drain easily from the indoor
units?
Water leakage
Is the voltage of the power source the
same as that indicated on the label on
the indoor unit?
No operation, heat or burn
damage
Are the wires and pipes all connected
completely?
No operation, heat or burn
damage
Is the indoor unit earthed (grounded)?
Short circuit
Is the connection cable the specified
thickness?
No operation, heat or burn
damage
Are the inlets and outlets free of any
obstacles?
No cooling, No heating
Does start and stop air conditioner
operation by remote control unit or
external device?
No operation
CHECK
BOX
Display mode
: 0.5s ON / 0.5s OFF
: 0.1s ON / 0.1s OFF
( ) : Number of flashing
After installation is completed, has the
proper operation and handling been
explained to the user?
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Wired Remote Controller Display
UTY-RNKU (3-wire type)
Error code
UTY-RNRU (2-wire type)
Error icon
Touch the [Status].
Touch the [Next Page] (or [previous page])
to switch to other indoor unit information.
Touch the [Error Information].
2-digit numbers are corresponding to
the error code in the preceding table.
For more information, refer to the installation manual of the remote controller.
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