Johnson Controls YDOA096B21S Manual

P00860Q
Installation
and
Maintenance
Manual
INVERTER-DRIVEN
MULTI-SPLIT SYSTEM
HEAT PUMP
AIR CONDITIONERS
IMPORTANT:
READ AND UNDERSTAND
THIS MANUAL BEFORE
USING THIS HEAT PUMP
AIR CONDITIONER.
KEEP THIS MANUAL FOR
FUTURE REFERENCE.
Type Model
DOAS
(Dedicated Outdoor
Air System)
(H,Y)DOA096B21S

P00860Q-rev.2 i
Important Notice
ƔJohnson Controls Inc. pursues a policy of continuing improvement in design and performance in its
products. As such, Johnson Controls Inc. reserves the right to make changes at any time without
prior notice.
ƔJohnson Controls Inc. cannot anticipate every possible circumstance that might involve a potential hazard.
ƔThis heat pump air conditioning unit is designed for standard air conditioning applications only. Do
not use this unit for anything other than the purposes for which it was intended for.
ƔThe installer and system specialist shall safeguard against leakage in accordance with local
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not available. International Organization for Standardization: (ISO 5149 or European Standard, EN
378). No part of this manual may be reproduced in any way without the expressed written consent of
Johnson Controls Inc.
ƔThis heat pump air conditioning unit will be operated and serviced in the United States of America
and comes with a full complement of the appropriate Safety, Danger, and Caution, Warnings.
ƔIf you have questions, please contact your distributor or dealer.
ƔThis manual provides common descriptions, basic and advanced information to maintain and service
this heat pump air conditioning unit which you operate as well for other models.
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performance and long life, operate this unit within the range limits according to the table below.
ƔThis manual should be considered as a permanent part of the air conditioning equipment and should
remain with the air conditioning equipment.
Product Inspection upon Arrival
1. Upon receiving this product, inspect it for any damages incurred in transit. Claims for damage, either
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2. Check the model number, electrical characteristics (power supply, voltage, and frequency rating),
and any accessories to determine if they agree with the purchase order.
3. The standard utilization for this unit is explained in these instructions. Use of this equipment for
purposes other than what it designed for is not recommended.
4. Please contact your local agent or contractor as any issues involving installation, performance, or
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performed by a customer without the written consent of Johnson Controls, Inc. Performing any
mechanical alterations on this product without the consent of the manufacturer will render your
warranty null and void.
Temperature
Maximum Minimum
Outdoor Air
Cooling Operation 109o)'% (43oC DB) 68o)'% (20oC DB)
Heating Operation 59o)'% (15oC DB) 20o)'% (-7oC DB)
DB: Dry Bulb, WB: Wet Bulb

ii P00860Q-rev.2
TABLE OF CONTENTS
1. Introduction .....................................................................................................................................................1
2. Safety Instructions...........................................................................................................................................1
3. Before Installation ...........................................................................................................................................7
3.1 Control Mode ........................................................................................................................................7
3.2 Combination of Outdoor Unit and Indoor Unit ........................................................................................7
3.3 Transportation and Handling ..................................................................................................................7
 )DFWRU\6XSSOLHG$FFHVVRULHV ................................................................................................................8
3.5 Necessary Tools and Instrument List for Installation ..............................................................................8
4. Installation Location ........................................................................................................................................9
5. Installation Work .............................................................................................................................................9
5.1 Suspension Bolts....................................................................................................................................9
5.2 Marking of Positions of Suspension Bolts and Piping Connections .....................................................10
5.3 Mounting Indoor Unit ............................................................................................................................10
5.4 Adjusting of Unit Level..........................................................................................................................12
5.5 Connecting Supply Duct.......................................................................................................................12
5.6 Installation of Remote Sensor ..............................................................................................................13
5.7 Installation of Wired Controller (Optional Parts) ...................................................................................14
5.8 Setting of Wired Controller and Remote Sensor ..................................................................................14
6. Refrigerant Piping Work................................................................................................................................15
6.1 Piping Materials....................................................................................................................................15
6.2 Piping Connection ................................................................................................................................16
7. Drain Piping ..................................................................................................................................................18
8. Electrical Wiring ............................................................................................................................................20
8.1 General Check .....................................................................................................................................20
8.2 Electrical Wiring Capacity.....................................................................................................................21
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8.2.2 Details of Electrical Wiring Connection.......................................................................................21
8.3 Position of Electrical Wiring Connection...............................................................................................23
8.4 Wiring Connection ................................................................................................................................27
8.5 DIP Switches Setting............................................................................................................................29
 )XQFWLRQ6HOHFWLRQE\:LUHG&RQWUROOHU ................................................................................................30
8.7 Setting of Control Mode........................................................................................................................31
8.7.1 Setting of Indoor Unit by Optional Wired Controller....................................................................31
 )XQFWLRQ6HOHFWLRQDQG,QSXW2XWSXW6HWWLQJ ..............................................................................32
8.7.3 Setting by DSW8 (Control Mode) on PCB..................................................................................33
8.7.4 Setting of Indoor Unit..................................................................................................................33
8.7.5 Setting of Outdoor Unit ..............................................................................................................34
8.8 Setting of Connected Outdoor Unit Type..............................................................................................34
9. Test Run........................................................................................................................................................35
9.1 Before Test Run....................................................................................................................................35
9.2 Test Run ...............................................................................................................................................35
9.3 Alarm Code ..........................................................................................................................................37

P00860Q-rev.2 1
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controller module.
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1. Introduction
2. Safety Instructions
Signal Words
Indicates a hazardous situation that, if not avoided, could result in death
or serious injury.
Indicates a hazardous situation that, if not avoided, could result in minor or
moderate injury.
Indicates information considered important, but not hazard-related (for
example, messages relating to property damage).
General Precautions
To reduce the risk of serious injury or death, read these instructions
thoroughly and follow all warnings or cautions included in all manuals
that accompanied the product and are attached to the unit. Refer back to
these safety instructions as needed.
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against possible damage or injury that might occur in an earthquake if the unit is not installed
correctly, injuries may occur due to a falling unit.
ƔUse appropriate Personal Protective Equipment (PPE), such as gloves and protective goggles and,
where appropriate, have a gas mask nearby. Also use electrical protection equipment and tools
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brazing. Use care in handling, rigging, and setting of bulky equipment.
ƔWhen transporting, be careful when picking up, moving and mounting these units. Although the
unit may be packed using plastic straps, do not use them for transporting the unit from one location
to another. Do not stand on or put any material on the unit. Get a partner to help, and bend with
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Provide this information and the warranty must be provided to all installers and users.
Ask end users to maintain copies for future reference.
(Refrigerant Piping Work) (Electrical Wiring Work) (Ref. Charge Work) (Test Run) (User)
Read following sections carefully before installing this product.
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2 P00860Q-rev.2
ƔDo not touch or adjust any safety devices inside the indoor or outdoor units. All safety features,
disengagement, and interlocks must be in place and functioning correctly before the equipment is put
into operation. If these devices are improperly adjusted or tampered with in any way, a serious accident
can occur. Never bypass or jump-out any safety device or switch.
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main switches.
ƔThis unit is the pressurized system. Never loosen threaded joints while the system is under pressure
and never open pressurized system parts.
ƔJohnson Controls will not assume any liability for injuries or damage caused by not following steps
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prohibited as they…
ƕMay create hazards which could result in death, serious injury or equipment damage;
ƕWill void product warranties;
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ƕMay violate OSHA standards;
Take the following precautions to reduce the risk of property damage.
ƔBe careful that moisture, dust, or variant refrigerant compounds not enter the refrigerant cycle during
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ƔDo not install this unit in any place where silicon gases can coalesce. If the silicon gas molecules
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inside of the electrical box, possibly causing electrical failures.
ƔWhen installing the unit in a hospital or other facility where electromagnetic waves are generated
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Electromagnetic Interference (EMI). Do not install where the waves can directly radiate into the
electrical box, controller cable, or controller. Inverters, appliances, high-frequency medical equipment,
and radio communications equipment may cause the unit to malfunction. The operation of the unit
may also adversely affect these same devices. Install the unit at least 10 ft. (3m) away from such
devices.
ƔWhen a wireless controller is used, locate at a distance of at least 3.3 ft. (1m) between the indoor
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commands.
ƔDo not install the unit in any location where animals and plants can come into direct contact with the
outlet air stream. Exposure could adversely affect the animals and plants.
ƔDo not install the unit with any downward slope to the side of the drain adaptor. If you do, you may
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ƔBe sure the drain hose discharges water properly. If connected incorrectly, it may cause leaks.
ƔDo not install the unit in any place where oil can seep onto the units, such as table or seating areas in
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features built into them. In addition, use a specialized ceiling fan designed for restaurant use. These
specialized oil-resistant units can be ordered for such applications. However, in places where large
quantities of oil can splash onto the unit, such as a factory, even the specialized units cannot be used.
These products should not be installed in such locations.
Installation Precautions
To reduce the risk of serious injury or death, the following installation
precautions must be followed.
ƔWhen installing the unit into…
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construct a strong wood or metal frame to provide added support.
ƓA room: Properly insulate any refrigerant tubing run inside a room to prevent “sweating” that can
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P00860Q-rev.2 3
ƓDamp or uneven areas: Use a raised concrete pad or concrete blocks to provide a solid, level
foundation for the unit to prevent water damage and abnormal vibration.
ƓAn area with high winds: Securely anchor the outdoor unit down with bolts and a metal frame.
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ƓA snowy area: Install the outdoor unit on a raised platform that is higher than drifting snow. Provide
snow vents.
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corrosion, or product failure.
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stove.
ƓWhere oil (including machinery oil) may be present.
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tub or a hot spring.
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ƓWhere the air quality is of high acidity.
ƓWhere harmful gases can be generated from decomposition.
ƔDo not position the drain pipe for the indoor unit near any sanitary sewers where corrosive gases
may be present. If you do, toxic gases can seep into breathable air spaces and can cause respiratory
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furniture, or other possessions may result. If the drain pipe becomes clogged, water may drip from the
indoor unit. Do not install the indoor unit where such dripping can cause moisture damage or uneven
locations: Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the unit
to prevent water damage and abnormal vibration.
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nearby.
ƔPerform a test run to ensure normal operation. Safety guards, shields, barriers, covers, and protective
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clothing away from any moving parts.
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been left inside the unit being installed.
After installation work for the system has been completed, explain the “Safety Precautions,” the proper use
and maintenance of this unit to the customer according to the information in all manuals that came with the
system. All manuals and warranty information must be given to the user or left near the Indoor Unit.

4 P00860Q-rev.2
Refrigerant Precautions
To reduce the risk of serious injury or death, the following refrigerant
precautions must be followed.
ƔAs originally manufactured, this unit contains refrigerant installed by Johnson Controls. Johnson
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or market. Johnson Controls distributors similarly are only authorized to provide refrigerants that
have been approved for use in the countries or markets they serve. The refrigerant used in this unit
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obtained from Johnson Controls distributors. Use of any non-approved refrigerant substitutes will void
the warranty and will increase the potential risk of injury or death.
ƔIf installed in a small room, take measures to prevent the refrigerant from exceeding the maximum
allowable concentration in the event that refrigerant gases should escape. Refrigerant gases can
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distributor for countermeasures (ventilation system and so on). If refrigerant gas has leaked during the
installation work, ventilate the room immediately.
ƔBefore installation is complete, make sure that the refrigerant leak test has been performed. If
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ƔWhen installing the unit, and connecting refrigerant piping, keep all piping runs as short as possible,
and make sure to securely connect the refrigerant piping before the compressor starts operating. If
the refrigerant piping is not connected and the compressor activates with the stop valve opened, the
UHIULJHUDQWF\FOHZLOOEHFRPHVXEMHFWHGWRH[WUHPHO\KLJKSUHVVXUHZKLFKFDQFDXVHDQH[SORVLRQRU¿UH
Ɣ 7LJKWHQWKHÀDUHQXWZLWKDWRUTXHZUHQFKLQWKHVSHFL¿HGPDQQHU'RQRWDSSO\H[FHVVLYHIRUFHWRWKH
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Ɣ $FRPSUHVVRUXQLWFRPSULVHVDSUHVVXUL]HGV\VWHP1HYHUORRVHQWKUHDGHGMRLQWVZKLOHWKHV\VWHPLV
under pressure and never open pressurized system parts.
ƔWhen maintaining, relocating, and disposing of the unit, dismantle the refrigerant piping after the
compressor stops.
Electrical Precautions
7DNHWKHIROORZLQJSUHFDXWLRQVWRUHGXFHWKHULVNRIHOHFWULFVKRFN¿UHRU
explosion resulting in serious injury or death.
ƔHighly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and
these instructions when wiring. Improper connections and inadequate grounding can cause serious
injury or death.
ƔBefore servicing, open and tag all disconnect switches. Never assume electrical power is
disconnected. Check with meter and equipment.
ƔOnly use electrical protection equipment and tools suited for this installation.
Ɣ 8VHVSHFL¿HGFDEOHVEHWZHHQXQLWV
ƔCommunication cable shall be a minimum of AWG18 (0.82mm2), 2-Conductor, Stranded Copper.
Shielded cable must be considered for applications and routing in areas of high EMI and other
sources of potentially excessive electrical noise to reduce the potential for communication errors.
When shielded cable is applied, proper bonding and termination of the cable shield is required as per
Johnson Controls guidelines. Plenum and riser ratings for communication cables must be considered
per application and local code requirements.
Ɣ 8VHDQH[FOXVLYHSRZHUVXSSO\IRUWKHDLUFRQGLWLRQHUDWWKHXQLW¶VUDWHGYROWDJH
ƔBe sure to install circuit breakers (ground fault interrupter, isolating switch, molded case circuit
EUHDNHUDQGVRRQZLWKWKHVSHFL¿HGFDSDFLW\(QVXUHWKDWWKHZLULQJWHUPLQDOVDUHWLJKWHQHG
VHFXUHO\WRUHFRPPHQGHGWRUTXHVSHFL¿FDWLRQV,IDFLUFXLWEUHDNHURUIXVHLVIUHTXHQWO\DFWLYDWHG
shut down the system and contact your service contractor.

P00860Q-rev.2 5
ƔClamp electrical wires securely with a cable clamp after all wiring is connected to the terminal block.
In addition, run wires securely through the wiring access channel.
ƔWhen installing the power lines, do not apply tension to the cables. Secure the suspended cables at
regular intervals, but not too tightly.
ƔMake sure that the terminals do not come into contact with the surface of the electrical box. If the
terminals are too close to the surface, it may lead to failures at the terminal connection.
Ɣ 7XUQ2))DQGGLVFRQQHFWWKHXQLWIURPWKHSRZHUVXSSO\ZKHQKDQGOLQJWKHVHUYLFHFRQQHFWRU'RQRW
RSHQWKHVHUYLFHFRYHURUDFFHVVSDQHOWRWKHLQGRRURURXWGRRUXQLWVZLWKRXWWXUQLQJ2))WKHPDLQ
power supply.
Ɣ $IWHUVWRSSLQJRSHUDWLRQEHVXUHWRZDLWDWOHDVW¿YHPLQXWHVEHIRUHWXUQLQJRIIWKHPDLQSRZHU
switch. Otherwise, water leakage or electrical breakdown may result. Disconnect the power supply
completely before attempting any maintenance for electrical parts. Check to ensure that no residual
voltage is present after disconnecting the power supply.
Ɣ 'RQRWFOHDQZLWKRUSRXUZDWHULQWRWKHFRQWUROOHUDVLWFRXOGFDXVHHOHFWULFVKRFNDQGRUGDPDJHWKH
unit. Do not use strong detergent such as a solvent. Clean with a soft cloth.
ƔCheck that the ground wiring is securely connected. Do not connect ground wiring to gas piping,
water piping, lighting conductor, or telephone ground wiring.
ƔIf a circuit breaker or fuse is frequently activated, shut down the system and contact your service
contractor.

6 P00860Q-rev.2
Ɣ 3URSHUKDQGOLQJRIWKLVXQLWUHTXLUHVWZRSHRSOH6DIHKDQGOLQJDQGLQVWDOOLQJWKHLQGRRUXQLWUHTXLUHVWKH
strength of two people. Mounting the unit alone may cause injury due to fall of the unit. Although the unit
PD\EHJLUGHGZLWKVWHHOEDQGLQJGRQRWXVHLWIRUWUDQVSRUWDWLRQ$YRLGFRQWDFWZLWK¿QQHGVXUIDFHVRI
WKHKHDWH[FKDQJHUDVVKDUSHGJHVFDQFDXVHVHYHUHLQMXU\WRKDQGVDQG¿QJHUV8VHDSSURSULDWHZRUN
gloves for the job.
NOTICE
Ɣ &KHFNWRHQVXUHWKDWWKHGUDLQKRVHGLVFKDUJHVPRLVWXUHSURSHUO\,IFRQQHFWHGLQFRUUHFWO\LWFDQUHVXOW
in leakage and damage to furniture.
ƔMake sure to use the factory-supplied drain hose and hose clamp. Other makes can cause moisture
leakage.
ƔDo not bend or twist the factory-supplied drain hose. This could compromise the seal and result in
moisture leakage.
Ɣ 'RQRWDSSO\DQH[FHVVLYHIRUFHWRWKHGUDLQSLSHFRQQHFWLRQ7KLVFDQDOVRFRPSURPLVHWKHVHDO
properties of the connection.
Ɣ 9HULI\WKDWWKHLQVWDOOHGXQLWLVOHYHOZLWKÀRRUDQGFHLOLQJVXUIDFHV$Q\YDULDQFHRULQFOLQDWLRQFDQFDXVH
PRLVWXUHWREDFNXSLQWRWKHGUDLQSDQRYHUÀRZDQGVHHSDJHRQWRFHLOLQJRUZDOOVXUIDFHVDQGFDXVH
damage to carpeted surfaces or furniture below.
Ɣ 'RQRWLQVWDOOWKLVV\VWHPLQFORVHSUR[LPLW\WRVHSWLFVHZHUOLQHVZKHUHÀDPPDEOHDQGWR[LFJDVHVFDQFRDOHVFH
ƔInspect the drain pan before the onset of winter to drain away all accumulated moisture in the pan.
Ɣ 7KHKHDWH[FKDQJHURILQGRRUXQLWRYHUKHDWVZKHQHYHUWKHUHLVDVOLJKWDPRXQWRIUHIULJHUDQWFLUFXODWLQJ
during slowdown or stoppage. As a result, moisture in the drain pan evaporates where it can condense
on ceiling or wall surfaces.
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Electrical Installation
In some cases, the packaged air conditioner may not be operated normally under the following cases:
ƔWhen electrical power for the packaged air conditioner is supplied from the same power transformer
as the device*.
ƔWhen the power supply wiring for the device* and the packaged air conditioner are located close to
each other:
 'HYLFH([DPSOH/LIWFRQWDLQHUFUDQHUHFWL¿HUIRUHOHFWULFUDLOZD\LQYHUWHUSRZHUGHYLFHDUF
furnace, electric furnace, large-sized induction motor, and large-sized switch.
It consumes large quantities of electrical power.
Regarding that mentioned above, surge voltage may be inducted into the power supply wiring for the crated
air conditioner due to a spike in power consumption for this device and an activation of the switch. Check
WKH¿HOGUHJXODWLRQVDQGVWDQGDUGVEHIRUHSHUIRUPLQJDQ\HOHFWULFDOZRUNLQRUGHUWRVDIHJXDUGWKHSRZHU
supply for the crated air conditioner unit.

P00860Q-rev.2 7
3.2 Combination of Outdoor Unit and Indoor Unit
,QGRRUXQLWVFDQEHFRQQHFWHGZLWKWKHRXWGRRUXQLW95)V\VWHP
Combination of Outdoor Unit and Indoor Unit
DOAS only Total capacity of DOAS is 100%~145% of the outdoor unit .*2)
DOAS
+
Other Standard
Indoor Unit
Capacity of DOAS shall be calculated by increased 1.5 times.
AND
Total capacity of indoor unit (including DOAS) shall be
within capacity range of connected outdoor unit.
*1) DOAS can not be connected with Heat Recovery system.
*2) When connected outdoor unit is Less Module type [Model: (H,Y)VAHP_B(3,4)1LM], total capacity of
DOAS shall be within 100%~120% of the outdoor unit.
 :KHQFRQQHFWLQJPXOWLSOH'2$6DQGRURWKHUVWDQGDUGLQGRRUXQLWWRWKHRXWGRRUXQLWEHVXUHWR
operate all indoor units simultaneously.
In addition, it is recommended that only connect one DOAS to the outdoor unit.
3. Before Installation
3.3 Transportation and Handling
(1) Transport the product as close to the installation location as possible before unpacking.
(2) Do not lay any objects on the indoor unit.
(3) The indoor unit comes crated upside-down with the foam polystyrene drain pan positioned on top.
'RQRWLQYHUWWKHXQLWXQWLOLWLVUHDG\WREHVXVSHQGHGDERYHWKHÀRRU,QYHUWLQJWKHXQLWZKLOHRQWKH
ÀRRUZLOOFUXVKWKHGUDLQSDQ'RQRWKDQGOHWKHXQLWE\JUDEELQJDWWKHSRO\VW\UHQHSDQDQGRWKHUDLU
outlets as they are fragile and will sustain damage.
(4) The indoor unit handle is fabricated from foam polystyrene and is susceptible to breakage if any
excessive force is applied as a result of mishandling of the unit during installation.
3.1 Control Mode
(1) This unit has two types of control mode which can keep either the Indoor temperature or the discharge
temperature to be more or less the temperature setpoint determined by wired controller. Choose a
suitable control mode according to the installation location and purposes. Refer to Section 8.7 “Setting
of Control Mode” for details about setting.
Perform installation work and the setting of the units according to the table below.
Control Mode Indoor Temperature Control
(factory-setting) Outlet Air Temperature Control
Details
This function controls operation to
keep the indoor temperature almost
at the set temperature on the wired
controller.
This function controls operation to
keep the discharge temperature
almost at the set temperature on the
wired controller.
Available Combination with
Other Indoor Unit Standard indoor unit Only DOAS set the function of outlet
air temperature control
Detection of Temperature A remote sensor or a thermistor built
in wired controller is necessary. Nothing is necessary.
Setting of
Indoor Unit
Control Mode
(Refer to
Section 8.7.1 to 8.7.4)
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AND
6HWWKHIXQFWLRQVHOHFWLRQWR&G
by optional wired controller.
(Both of them are factory-setting.)
Turn ON No.3 pin (DSW8).
OR
6HWWKHIXQFWLRQVHOHFWLRQWR&G
by optional wired controller.
Connected
Outdoor Unit Type
(Refer to Section 8.8)
According to the outdoor unit type.
Setting of Outdoor Unit
(Refer to Section 8.7.5) No setting. 6HW WKH IXQFWLRQ VHWWLQJ WR )7 E\
outdoor PCB.

8 P00860Q-rev.2
3.5 Necessary Tools and Instrument List for Installation
 )DFWRU\6XSSOLHG$FFHVVRULHV
Check to ensure that the following accessories are packed with the indoor unit.
7KHVFUHZVZDVKHUVDQGÀDUHQXWVDUHSDFNHGLQWKHSLSHLQVXODWLRQ
NOTE:
Use tools and measuring
instruments (vacuum pump, gas
hose, charging cylinder, manifold
gauge) exclusively for refrigerant
R410A.
No. Tool No. Tool
1 Handsaw 11 Torque Wrench
2 Phillips Screwdriver 12 Charging Cylinder
3 Vacuum Pump 13 Manifold Gauge
4 Refrigerant Gas Hose 14 Wire Cutter
5 Megohmmeter 15 Gas Leak Detector
6 Copper Pipe Bender 16 Level
7 Manual Water Pump 17 Crimper for Solderless Terminals
8 Pipe Cutter 18 Hoist (for Indoor Unit)
9 Brazing Kit 19 Ammeter
10 Hexagon Wrench 20 Voltage Meter
NOTICE
The controller and branch piping are optional accessories which are not included with the indoor unit.
If necessary, please contact your contractor.
Accessory Purpose
Washer (M10)
Hose Clamp
Qty.
8
1
For Unit Suspension
For Drain Pipe Connection
Drain Hose
1 For Drain Pipe Connection
Vibration-proof
Rubber 8 For Unit Suspension
Remote Sensor (*)
1 For Detecting Indoor Temperature
Screw (M4) (*)
(*): Only for “Indoor Temperature Control” mode.
1 For Fixing Remote Sensor
Cord Clamp
5
PVC Tube
2
For Fixing PVC Tube
Cord Clamp
8 For Refrigerant Piping Thermal Insulation
For Separating Transmission Wirings and
Wired Controller Wirings from Power Supply Wirings
ID 1/2 inch (12mm)
Pipe Insulation
1For Refrigerant Liquid Piping Connection
ID 1 inch (26mm)
1For Refrigerant Gas Piping Connection
ID 1-1/8 inches (28mm)

P00860Q-rev.2 9
4. Installation Location
)LJXUH2SHUDWLRQDQG,QVWDOODWLRQ6SDFH
(1) Install the indoor unit, allowing for proper clearance for operation and maintenance access, as shown in
)LJXUH
Min. 31-1/2
[800]
5-7/8 to 7-7/8
[150 to 200]
Electrical Control Box
Min. 39-3/8
[1000]
Min. 39-3/8
[1000]
Min. 23-5/8
[600]
Service Access Door
(Min. 23-5/8 [600]
If the ceiling board can not be detected
for servicing, prepare a service access door below
the indoor unit for removing the indoor unit.
(2) Consider the air distribution from the indoor unit to the space of the room, and select a suitable location
so that uniform air temperature in the room can be obtained.
(3) Do not leave combustible materials inside the service space of the indoor unit.
 $YRLGREVWDFOHVZKLFKPD\KDPSHUWKHLQWDNHDLUÀRZRUWKHGLVFKDUJHDLUÀRZ
 'RQRWLQVWDOOWKHLQGRRUXQLWLQDPDFKLQHVKRSRUNLWFKHQZKHUHYDSRUIURPRLORULWVPLVWÀRZVWRWKH
indoor unit.
The oil will deposit on the heat exchanger, thereby reducing the indoor unit performance, and may
deform and in the worst case, break the plastic parts of the indoor unit.
(6) Pay attention to the following points when the indoor unit is installed in a hospital or other facilities
where there are electronic waves from medical equipment.
(a) Do not install the indoor unit where the electromagnetic wave is directly radiated to the electrical
box, communication cable or wired controller.
(b) Install the indoor unit and components as far away as practical or at least 9.8ft (3m) from any
electromagnetic wave radiator.
(c) Prepare a steel box and install the wired controller in it. Prepare a steel conduit tube and wire the
controller cable in it. Then, connect the ground wiring with the box and the tube.
G ,QVWDOODQRLVH¿OWHUZKHQWKHSRZHUVXSSO\HPLWVKDUPIXOQRLVHV
(7) To avoid any corrosive action to the heat exchangers, do not install the indoor unit in an acid or alkaline
environment.
5. Installation Work
5.1 Suspension Bolts
 'HWHUPLQHWKH¿QDOORFDWLRQDQGLQVWDOODWLRQ
orientation of the indoor unit with respect
to the space allowed for piping, wiring, and
maintenance access.
(2) Mount suspension bolts, as shown in
)LJXUH
5-7/8 to 6-5/16 Insert
(221 to 331 lbs)
I Beam
(inch)
Suspension Bolt
(W3/8 or M10)
Anchor Bolt
(W3/8 or M10)
Steel
Concrete
For Wooden Beam Suspension
Wooden Bar
(2-3/8 to 3-9/16 Square)
Wooden Beam
Nut
Nut
Square Washer
Square Washer
Suspension Bolt
For Concrete Slab For Steel Beam
)LJXUH0RXQWLQJRI6XVSHQVLRQ%ROWV
Unit: inch [mm]

10 P00860Q-rev.2
5.3 Mounting Indoor Unit
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)LHOG6XSSOLHG3DUWV
6XVSHQVLRQ%ROWV0RU:
1XW0RU:
5.2 Marking of Positions of Suspension Bolts and Piping Connections
(1) Mark the positions of the suspension bolts, refrigerant piping connections and drain connection.
 ,QVWDOODWLRQGLPHQVLRQVDUHVKRZQLQ)LJXUH
Suspension
Bracket
Suspension Bolts (4-M10 or W3/8)
(Field-Supplied)
False Ceiling Side
Max. 29-1/2 [750]
Vibration-proof
Rubber
(Accessory)
Nut & Washer
(8-M10 or W3/8
)
Unit
)LJXUHMounting Indoor Unit
)LJXUH6XVSHQVLRQ%ROWV
Unit: inch [mm]
1-15/16 [50]
5-7/16
[138]
1-9/16 [40]50 [1270]
52-3/8 [1330] (for Suspension Bolt)
39-3/8 [1000]
56-φ1/8 [3]
Around the Flange
2-9/16 x 1-3/8 [65 x 35]
(for Suspension Bolt)
Refrigerant Gas Pipe Connection
Refrigerant Liquid Pipe Connection
Drain Pipe Connection
9-15/16 [252]
13-5/8 [346]
18-7/16 [469]
1/2 [13] 15/16 [24]
40-3/16 [1021] (for Suspension Bolt)1 [25]
5/8 [16]
1-1/8 [28]42-1/16 [1069]7/8 [23]
1-15/16 [50]
4-7/16
[113]
41-5/16 [1050]
60-φ1/8 [3]
Around the Flange

P00860Q-rev.2 11
)LJXUH6XVSHQGHG,QGRRU8QLW
(2) Suspension Indoor Unit
* Hook the suspension bracket to the nut, washer and vibration-proof rubber of each suspension bolt,
as shown, starting at the opposite side and working over to the service cover side.
 $IWHUYHULI\LQJWKDWWKHQXWZDVKHUDQGYLEUDWLRQSURRIUXEEHUDUHFRUUHFWO\DI¿[HGWRWKHUHWDLQHUVRQ
the suspension bracket, hook the suspension bracket of the service cover side to the nut, washer and
vibration-proof rubber.
(Install the suspension bolts away from the unit when fastening.)
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(1) Prepare the suspension bolts, washers,
nuts and vibration-proof rubbers,
DVVKRZQLQ)LJXUH
Approx. 1-15/16 inches
(50mm)
Washer
Vibration-proof
Rubber
Vibration-proof
Rubber
Nut
Washer
Indoor Unit
Retaining Nut
Suspension Bolt
Suspension Bracket
Suspension
Bracket
Nut and
Washer
Vibration-proof
Rubber
Right Side
(Service Cover Side)
Indoor Unit
Left Side
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B
A
ir Outlet
Air Intlet
A
Indoor Unit
inch (mm)
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)ODPPDEOH 1RQÀDPPDEOH
A0LQ (1,000) 0LQ (100)
B0LQ (600) 0LQ (50)

12 P00860Q-rev.2
5.5 Connecting Supply Duct
5.4 Adjusting of Unit Level
(1) Use a level to verify that the unit is perfectly horizontal. There should be no degree of slope present.
3/16 inch
(5mm)
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than the front side, to allow for proper drainage.
(3) Tighten the bolts of the nuts with the suspension brackets after adjustment is completed.
Adhesive must be applied to the bolts in order to prevent them from loosening.
NOTE:
During position the installation process, keep the unit well covered with vinyl cover and related
components covered until it is time to hoist into position.
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below in order to avoid abnormal sound vibration.
(4) Attach the vibration-proof rubber to suspension bolts in order to avoid abnormal sound vibration.
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Discharge Pressure Loss”. If the duct design is not appropriate, a bigger noise, splashed the water etc.
will occur. The damper or the duct fan etc. shall be used to adjust the fresh air volume to let the unit
external static pressure be more or less within pressure loss of duct.
(6) If pressure loss of duct is excessive, change the installation location of the unit or the shape of ducts in
order to let the design arrangement be within the unit external static pressure.
(7) Make sure that a service access panel is mounted on the ceiling for the service of electrical parts and
motor etc.. If the service access panel can not be mounted on the ceiling, an alternative opening shall
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installed and removed easily and for a fan, a heat exchanger and a drain pan to be installed through it.
(8) Install thermal insulations over the duct to prevent it from condensation.
(9) Do not install the duct in following places.
- Places where is subject to directly radiant heat from the sunlight or heat sources.
- Places where corrosive gases, volatile gases and explosive gases are generated.
- Places where air intake of such as a kitchen etc. is faced on.
In addition, install a protection hood and wrap the air inlet with seal materials (such as a net) to protect
the duct from any insects or small animals.
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wind blows (coast region, etc), consult with your distributor for countermeasures about the a periodic
maintenance and contract to replace a heat exchanger.
(11) If the outdoor temperature is low, “Defrosting Operation” is performed automatically and the air
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decreased when heating operation is started up. Therefore, make sure to choose the location with care
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P00860Q-rev.2 13
)LJXUH'XFW&RQQHFWLRQ([DPSOH
Outdoor Air
(with Air Filter)
Damper for
Adjusting Air Volume
SilencerSilencer Canvas DuctCanvas Duct
Thermal
Insulation
Damper for
Adjusting Air Volume
Air Outlet Level Ceiling
DOAS
Unit
Service Access Panel
(17-11/16 inches x 17-11/16 inches)
An alternative opening
(12) The DOAS unit is designed to process outdoor air intake and should not be used as a standard indoor
unit. If the internal load is higher, additional indoor units need to be added.
(13) The DOAS unit is designed to intake outdoor air only.
Indoor air is not recommended to be returned to the DOAS unit.
(14) Install the ducts with the its air inlet being a lower level than the indoor unit to protect the unit from rain.
Voltage Model Static Pressure
in.W.G.(Pa)
208V (H,Y)DOA096B21S 1.06 (265)
230V 1.24 (310)
5.6 Installation of Remote Sensor
(1) Installing Remote Sensor on Wall
Fixing Screw
Sensor Box
1-1/4
(32)
Unit: inch (mm)
2-M4
Dimension for Fixing Remote Sensor on Wall
1-1/4
(32)
- Cut out the wiring holes in the sensor box and lead the wires for the sensor through the holes.
- Secure the sensor box on the wall with the two screws.
- If the sensor box cannot be secured on the wall with the screws, use double-sided tapes.
(2) Concealing Wires inside Wall
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on the right, and secure the sensor box to the plate with screws.
- Make sure that the hole for air intake on the sensor box remains unobstructed.
Sensor Box Cover
Switch Box
(Field-Supplied)
Unit: inch [mm]
Fixing Screw
Sensor Box Fixing Frame
(Field-Supplied)
Metal Plate
(Field-Supplied)
1-1/4
[32]
(2-3/4 [70])
(4-3/4 [120])
1-1/4
[32]
5/8
[16]
2-M4

14 P00860Q-rev.2
5.7 Installation of Wired Controller (Optional Parts)
Refer to “Installation & Maintenance Manual” of optional wired controller.
5.8 Setting of Wired Controller and Remote Sensor
When the function of Indoor Temperature Control is set, a remote thermistor built in optional wired controller
or remote sensor is necessary. Determine the installation location of the wired controller and remote sensor
according to below.
Do not install the wired controller and remote sensor in following places.
- Places where the average temperature of indoor rooms can not be detected.
- Places where are directly subject to the sunlight.
- Places where is near heat sources.
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- Places where are subject to the outdoor air by opening door etc.
Determine how to detect indoor temperature as follows, paying attention the installation location.
(1) Remote Sensor
Connect remote sensor to this unit. The setting is not necessary.
(2) Remote Thermistor Built in Optional Wired Controller
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controller and follow as shown below.
Item Code 2SWLRQDO)XQFWLRQ Setting Condition
C8 Thermistor of Wired Controller 01
(3) Combination of Remote Sensor and Remote Thermistor Built in Optional Wired Controller
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optional wired controller and follow as shown below.
Item Code 2SWLRQDO)XQFWLRQ Setting Condition
C8 Thermistor of Wired Controller 02
NOTES:
1. When the function of Indoor temperature control is set and the operation without optional wired
controller or remote sensor is tried, alarm “16” and “17” will be indicated and operation will be not available.
(Even if the function of Outlet Air Temperature Control is set without them, alarms are not indicated)
2. Refer to “Installation and Maintenance Manual” of the optional wired controller for details.
It works by calculating the average of the two different
temperatures between the remote thermistor built in
optional wired controller and remote sensor.

P00860Q-rev.2 15
6. Refrigerant Piping Work
Table 6.1 Piping Size inch (mm)
Model Gas Piping Liquid Piping
(H,Y)DOA096B21S I (22.2) I (9.52)
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(4) Select clean copper pipes. Make sure there is no dust and moisture inside.
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special care during the installation so that moisture, contaminations or old refrigerant oil will not enter
the refrigerant cycle. Otherwise, impurities may adhere to the expansion valve and it may prevent
proper operation.
(6) When cutting the pipes, use a pipe cutter to avoid grind swarf generation for the pipe cutting work. Blow
the inside of pipes with nitrogen or dry air to remove any dust or foreign materials before connecting
pipes. Do not use any tools which produce a lot of swarf such as a saw or a grinder.
6.1 Piping Materials
(1) The tolerance of refrigerant piping length differs depending on the combination with the outdoor unit.
Refer to “Installation and Maintenance Manual” of the outdoor unit for details.
(2) Select the piping size from the following table.
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In Case of Getting the Pipe
Through a Hole in the Wall
Correct CorrectIncorrect Incorrect
Correct Incorrect
HoleHole
Attach a cap or put a plastic bag
over the pipe end.
Attach a cap or put a plastic
bag over the pipe end.
Attach a cap or put a plastic
bag over the pipe end.
Rubber Band
Do not lay the pipe
directly on the ground.
Rain water
can come in.
In Case of Rain

16 P00860Q-rev.2
(1) Position of piping connection is shown below.
Unit: inch [mm]
6.2 Piping Connection
2-7/8 [72]
(Drain Pipe Connection)
4-15/16 [126]
(Refrigerant Gas and Liquid Pipe Connection)
6-1/2
[165]
7-1/16
[179]
8-5/16
[211]
9-15/16 [252]
13-5/8 [346]
18-7/16 [469]
Refrigerant Gas Pipe ConnectionRefrigerant Liquid Pipe Connection
Drain Pipe Connection VP25
(Outer Diameter φ1-1/4 [32])
Cut Release the gas before removing
the cap from the pipe.
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(2) Both the liquid refrigerant pipe and the gas refrigerant pipe have a thermistor for temperature
detection. When brazing them to the indoor unit, cover and cool the pipes with a wet cloth so that the
pipes will not be affected by the heat.
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affect the heat of brazing to the thermistor when brazing the gas refrigerant pipe. (If the gas refrigerant
pipe is affected by the heat, it may cause malfunction.)
Liquid Pipe
Gas Pipe
Cool by a wet cloth.
Gas Thermistor
Take care to ensure that
the flame does not come
into contact with the main
body itself.
After brazing the pipes, check for leakage
and then insulate the pipes. Wrap the
connection between the pipe on the unit and
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