York R-410A User manual

No. 0150520007
Read this manual before installation and operation
Make sure that it is well kept for later reference
Floor Ceiling R410A 50Hz
U ER' MANUAL
YIFFZC025BAEFA
YIFFZC030BAEFA
YIFFZC036BAEFA
YIFFZC036BANFA
YIFFZC040BAEFB
YIFFZC040BANFA

Contents
Cautions
afety Precautions
Parts and Functions
Maintenance
Troubleshooting
error code
Installation Procedure
Test Run
3
5
7
9
9
11
13
25

3
Ca tions
Disposal of the old air conditioner
Before disposing an old air conditioner that goes out of use, please make sure it's inoperative and safe. Unplug the air
conditioner in order to avoid the risk of child entrapment.
It must be noticed that air conditioner system contains refrigerants, which require specialized waste disposal. The valuable
materials contained in a air conditioner can be recycled. Contact your local waste disposal center for proper disposal of an old
air conditioner and contact your local authority or your dealer if you have any question. Please ensure that the pipework of
your air conditioner does not get damaged prior to being picked up by the relevant waste disposal center, and contribute to
environmental awareness by insisting on an appropriate, anti-pollution method of disposal.
Disposal of the packaging of yo r new air conditioner
All the packaging materials employed in the package of your new air conditioner may be disposed without any danger to the
environment.
The cardboard box may be broken or cut into smaller pieces and given to a waste paper disposal service. The wrapping bag
made of polyethylene and the polyethylene foam pads contain no fluorochloric hydrocarbon.
All these valuable materials may be taken to a waste collecting center and used again after adequate recycling.
Consult your local authorities for the name and address of the waste materials collecting centers and waste paper disposal
services nearest to your house.
Safety Instr ctions and Warnings
Before starting the air conditioner, read the information given in the User's Guide carefully. The User's Guide contains very
important observations relating to the assembly, operation and maintenance of the air conditioner.
The manufacturer does not accept responsibility for any damages that may arise due to non-observation of the following
instruction.
Damaged air conditioners are not to be put into operation. In case of doubt, consult your supplier.
Use of the air conditioner is to be carried out in strict compliance with the relative instructions set forth in the User's Guide.
Installation shall be done by professional people. Don't install unit by yourself.
For the purpose of safety, the air conditioner must be properly grounded in accordance with specifications.
Always remember to unplug the air conditioner before opening inlet grill. Always grip plug firmly and pull straight out from the
outlet.
All electrical repairs must be carried out by qualified electricians. Inadequate repairs may result in a major source of danger for
the user of the air conditioner.
Do not damage any parts of the air conditioner that carry refrigerant by piercing or perforating the air conditioner's tubes
with sharp or pointed items, crushing or twisting any tubes, or scraping the coatings off the surfaces. If the refrigerant spurts
out and gets into eyes, it may result in serious eye injuries.
Do not obstruct or cover the ventilation grille of the air conditioner. Do not put fingers or any other things into the inlet/outlet and
swing louver.
Do not allow children to play with the air conditioner. In no case should children be allowed to sit on the outdoor unit.
When the indoor unit is turned on, the PCB will test if swing motor is O.K., and then fan motor will start up. o there is a few
seconds to wait.
In cooling mode,the flaps will swing automatically to a fixed position for anti-condensating.

If the air conditioner is used under higher temperature condition than those listed, the built-in protection circuit may operate
to prevent internal circuit damage. Also, during Cooling and Dry modes, if the unit is used under conditions of lower
temperature than those listed above, the heat-exchanger may freeze, leading to water leakage and other damage.
Do not use this unit for purposes other than cooling, dehumidifying and ventilation of rooms in ordinary dwellings.
The wiring method should be in line with the local wiring standard.
The waste battery should be disposed properly.
If the fuse on PC board is broken, please change it with the type T3.15A/250VAC.
4
Ca tions
Temperat re and H midity Range
Cooling
Indoor temperature
Outdoor temperature
max. DB/WB
min. DB/WB
max. DB/WB
min. DB/WB
32/23
18/14
43/26
18/-
Specifications
The refrigerating circuit is leak-proof.
For all the models in this manual, the all-pole discon-nexion connection method should be applied in the power supply.
uch means for disconnection must be incorporation in the fixed wiring.

WARNING
DANGER
5
Safety Preca tions
The breaker of the air conditioner should be all-pole switch, and the distance between its two contacts should be no less
3 mm. uch means for disconnection must be incorporation in the fixed wiring.
Use copper wire only. All the cables shall have got the local authentication certificate.
The power supply connects from the outdoor side. The connecting cable and the power cable are self-provided.
WARNING
Do not attempt to install this air conditioner by yourself.
This unit contains no user-serviceable parts. Always consult authorized service personnel for repairs.
When moving, consult authorized service personnel for disconnection and installation of the unit.
Do not become excessively chilled by staying for lengthy periods in the direct cooling airflow.
Do not insert fingers or objects into the outlet port or intake grills.
Do not start and stop air conditioner operation by connecting and disconnecting the power supply cord and so on.
Take care not to damage the power supply cord. If the supply cord is damaged, it must be replaced by the manufacturer
or authorized service agent in order to avoid a hazard.
In the event of a malfunction (burning smell, etc.), stop operation immediately, turn off the circuit breaker, and consult
authorized service personnel.
Provide occasional ventilation during use.
Do not direct air flow at fire places or heating apparatuses.
Do not place objects on the air conditioner or climb onto it .
Do not hang objects from the indoor unit.
Do not set flower vases or water containers on top of the air conditioner.
Do not expose the air conditioner directly to water.
Do not operate the air conditioner with wet hands.
Do not pull power supply cord.
Turn off power source when not using the unit for extended periods.
Check the condition of the installation stand for damage.
Do not place animals or plants in the direct path of the air flow.
Do not drink the water drained from the air conditioner.
Do not use in applications involving the storage of foods, plants or animals, precision equipment or art works.
Do not apply any heavy pressure to radiator fins.
Operate only with air filters installed.
Do not block or cover the intake grill and outlet port.
Ensure that any electronic equipment is at least one metre away from either the indoor or outdoor unit.
Avoid installing the air conditioner near a fireplace or other heating apparatuses.
When installing the indoor and outdoor unit, take precautions to prevent access to infants.
Do not use inflammable gases near the air conditioner.
Below are listed three kinds of afety Cautions and uggestions.
WARNING!
CAUTION! Incorrect operations may result in injuries or machine damages; in some cases may cause serious consequences.
Incorrect operations may result in severe consequences of death or serious injuries.
INSTRUCTIONS: These information can ensure the correct operation of the machine.
Be sure to conform with the following important afety Cautions.
The Safety Ca tions sho ld be at hand so that they can be checked at any time when needed.
If the conditioner is transferred to the new user, this manual should be as well transferred to the new user.
Caref lly read the following information in order to operate the airconditioner correctly.

6
Safety Preca tions
WARNING!
If any abnormal phenomena is fo nd (e. g.smell of
firing), please c t off the power s pply immediately,
and contact the dealer to find o t the handling
method.
Don't dismantle the o tlet of the o tdoor nit.
The exposure of fan is very dangerous whichmay harm
human beings.
switch
off
After a long time se of air-conditioner the base
sho ld be checked for any damages.
If the damaged base is not repaired, the unit may fall
down and cause accidents.
Use discharge pipe correctly to ens re efficient
discharge.
Incorrect pipe use may cause water leaking.
No goods or nobody is permitted to placed on or
stand on o tdoor nit.
The falling of goods and people may cause accidents.
Don't operate the air-conditioner with damp hands.
Otherwise will be shocked.
Only se correctly-typed f se.
May not use wire or any other materials replacing fuse,
otherwise may cause faults or fire accidents.
Earthing
Please let the dealer be responsible for installing
the conditioner.
Incorrect installation may cause water leak, electrical
shock and fire hazard.
When conditioner is deinstalled or reinstalleddealer
sho ld be respon-sible for them.
Incorrect installation may cause water leaking, electrical
shock and fire hazard.
Call the dealer to take meas res to prevent the
refrigerant from leaking.
If conditioner is installed in a small room be sure to take
every measure in order to prevent suffocation accident
even in case of refrigerant leakage.
Connect earthing wire.
Earthing wire should not be con- nected to the
gas pipe, water pipe, lightning rod or phone
line, in-correct earthing may cause shock.
Air-conditioner can't be installed in the environment
with inflammable gases beca se the inflammable
gases near to air-conditioner may ca se fire hazard.
Installed electrical-leaking circ it breaker.
It easily cause electrical shock without circuit breaker.
In such case, to continue using the conditioner will
damage the conditioner, and may cause electrical shock
or fire hazard.
Incorrect maintenance and repairment may cause water
leak, electrical shock and fire hazard.
When need maintenance and repairment, call dealer
to handle it.

7
Parts and F nctions
(1) Operating Control Panel
(2) Emergency witch
(3) Power Indicator Lamp
(4) OPERATION Indicator Lamp
(5) TIMER Indicator Lamp
(6) Compressor Lamp
(7) Remote Receiver
(8) Inlet Grill ( Filter inside )
(9) Front Panel
Note :
For the wired control type unit, the unit state should be checked by the wired controller, instead of the remote receiver.
And if you set the TIMER function, the TIMER LED on the remote receiver will not be on.
Indoor nit
POWER OPER TIMER
EMER
COMP
1
34 5 6 7
2
9
8
1
1
9
8
YIFFXC030BAEFA
YIFFXC036BAEFA
YIFFXC036BANFA
YIFFXC040BAEFB
YIFFXC040BANFA
YIFFXC025BAEFA

O tdoor nit
8
Parts and F nctions
YIFFYC025BAEFA
YIFFYC040BAEFB YIFFYC040BANFA
YIFFYC030BAEFA YIFFYC036BAEFA
YIFFYC036BANFA
(Inside of unit)
Compressor
Air inlet
Air outlet
(Inside of unit)
Compressor
Air inlet
Air outlet
(Inside of unit)
Compressor
Air inlet
Air outlet

9
Maintenance
Clean the air filter
Pull the filters upward to remove them from the Intake Grill.
Clean the air filter: Remove the dust from the filters by vacuum cleaner or washing
them. After washing, allow the air filters to dry thoroughly in an area protected from
sunlight.
Re-attach the air filters to the Intake Grill. Press the two buttons on the filters until
you hear a sound of click.
When used for extended periods, the unit may accumulate dirt inside, which reduces its performance. We recommend
that the unit is inspected regularly, in addition to your own cleaning and care. For more information, consult authorized
service personnel.
When cleaning the unit's body, do not use water hotter than 40 C, harsh abrasive cleansers, or volatile agents like
benzene or thinner.
Do not expose the unit body to liquid insecticides or hairsprays.
When shutting down the unit for one month or more, first allow the Fan mode to operate continuously for about half a
day to allow internal parts to dry thoroughly.
Maintenance of indoor nits
1.
2.
3.
Followings are not problems
ound of water flowing is not a problem.
ound of cracking is heard.
mell are generated.
During operation, white fog or steam
comes out from the indoor unit.
No outlet air or fan speed can't be changed
in dry mode.
In cooling operation, unit switches to
blowing operation.
Won't start?
In heating operation, water or steam
are blown out of outdoor unit.
In heating operation, indoor fan won't stop
even if unit is stopped.
During unit operation or at stop, a swishing or gurgling noise may be heard.
This noise is generated by refrigerant flowing in the system.
Unit will not restart after stop.
During unit operation, a cracking noise may be heard.
This noise is generated by the casing expanding or shrinking because of
temperature changes.
This is because the system circulates smells from the interior air such as
the smell of cigarettes or the painting on the furniture.
When unit is running at places like restaurant, etc. where dense edible oil
fumes always exist, this will happen.
To prevent frost from accumulating on indoor heat exchanger, unit will switch
to blowing operation for a while then resume cooling operation.
Though ON/OFF button is set to ON, the unit won't
resume cooling, dry or heating operation in 3 min
after it is stopped, this is because of
3-min-delay protection circuit.
Please wait 3 minutes
Unit will reduce fan speed repeatedly and automatically if room temp. is
too low in dry operation.
This occurs when frost accumulated on the outdoor unit is removed.
(during defrosting operation)
After unit stop, indoor fan will go on running until indoor unit cools down.
Tro bleshooting

10
Tro bleshooting
Before ask for services, please first check your unit against the following.
Air conditioner won't start.
Poor cooling or heating
Is power supply switch turned on?
Power supply switch is not set at ON.
Is city power supply normal? Is leakage current breaker activated?
This is very dangerous, please
disconnect power supply immediately
and contact your dealer.
Are operation control adjusted
correctly as specified?
Is air filter too dirty? Are there any obstacles in inlet or
outlet grill?
Are horizontal louvers at up position
(in heating mode)?
Any doors or windows left open?
Power
failure?
Proper
temp
If your unit still can't work properly after above mentioned checks, or following problems occur, please stop it immediately
and contact your dealer.
Fuses or circuit breakers often blow out.
Water comes out in cooling/dry operation.
Operation is abnormal or sound is heard.
Is there any direct sunlight in the room? If there are unexpected heat sources
in the room?
Too many people in the room?
Poor cooling
Cold air blows out (in heating mode). Is air conditioner in standby condition in heating mode?

11
Error code
Diagnosis for models
YIFFXC025BAEFA YIFFXC030BAEFA YIFFXC036BAEFA YIFFXC036BANFA YIFFXC040BANFA
YIFFXC040BAEFB
Wired
controller
display
Possible reasons
LED flash
times of signal
receiver board
1Malfunction of indoor unit ambient
temperature sensor
Malfunction of indoor unit piping
temperature sensor
Compressor overcurrent / phase
sequence wrong
Abnormal communication between
wired controller and indoor unit
Malfunction of drain system
Indoor coil temperature too high in
cooling mode
2
5
9
10
14
Contents of Malfunction
E1
E2
E5
E8
E0
FC
ensor disconected,or broken, or at wrong position,
or short circuit
ensor disconected, or broken, or at wrong position,
or short circuit
Overcurrent after compressor running or power suppl
phase sequence wrong before compressor running.It
occurs 3 times in 1 hour, comfirm the failure, the former
twice will not alarm.
Wrong connection or wired controller broken, or PCB
faulty
Pump motor disconnected or at wrong position,or
the float switch disconnected, or at wrong position,
or the short circuit bridge disconne ted
Refrigerant leakage or indoor coil sensor falling off
Wired
controller
display
Possible reasons
LED flash
times of signal
receiver board
0Malfunction of indoor unit ambient
temperature sensor
0
0
0
0
Contents of Malfunction
01
02
04
07
/
ensor disconected,or broken, or at wrong position,
or short circuit
1
2
4
7
8
Malfunction of indoor unit ambient
temperature sensor
ensor disconected,or broken, or at wrong position,
or short circuit
EEPROM wrong of indoor PCB EEPROM chip disconected or broken or wrong
programmed, or PCB broken
Abnormal communication between
indoor and outdoor units.
Wrong connection,or the wires be disconected or wrong
adress setting of indoor unit or faulty power supply or
faulty PCB or slave unit malfunction in MAXI system.
Abnormal communication between
wired controller and indoor unit
Wrong connection or wired controller broken, or PCB
faulty
00C12
00D13
01016
Malfunction of drain system
Pump motor disconnected or at wrong position,or
the float switch disconnected, or at wrong position,
or the short circuit bridge disconne ted
Zero cross sigal wrong Zero cross sigal detected wrong
Indoor abnormal mode operation Different from outdoor unit mode
Note:
1. The outdoor failure can also be indicated by the indoor unit, the checking method as follows: LED4 flash times stands
for tens digit, and LED3 flash times stands for units digit, use this bidigitate figure minus 20, then will get the outdoor
error code. For example, if the outdoor error code is 15, LED4 will flash 3 times firstly, two seconds later, LED3 will flash
5 times, and four seconds later the process will repeat again.
2. LED4 is a yellow one on the indoor PCB, LED3 is a green one.
3. To get much more details about the out door unit failure, please refer to the outdoor unit trouble shooting list.

12
Error code
YIFFYC036BANFA YIFFYC040BANFA
YIFFYC040BAEFB
Possible reasons
LED flash
times of signal
receiver board
5 Phase sequence abnormal
4
6
Trouble shooting
Power supply phase sequence wrong
Trouble Description Remark
LED flash
times of LED
11 Protection of discharging temp. too
high
5
14
13
6
9
Analyze and diagnose
Protection of discharging temp. too
high or sensor abnormal
After compressor starts up,if TD is over120 ,
10seconds later compressor stop
High/Low pressure switch acts abnormal Pressure abnormal
16
After compressor starts up, if TD is over 120 ,10
seconds later compressor stops Resumable
Compressor current pretection
abnormal
Overcurrent/low current or current imbalance
between two phase after compressor running Non-Resumable
Anti-freeze protection indication ystem into Anti-freeze protection Resumable
EEPROM error Loss of data EEPROM Non-Resumable
High pressure abnormal High pressure switch acts abnormal. Non-Resumable
Abnormal communication between
indoor and outdoor unit Wrong connection or PCB faulty Resumable
Low presure abnormal Low pressure switch acts abnormal. Non-Resumable

(1) For the room air conditioner to operate satisfactorily, install it as outlined in this installation manual.
(2) Connect the indoor unit and outdoor unit with the room air conditioner piping and cords available from our standard
parts. This installation manual describes for the correct connections so that the installation set available from our
standard parts should be used.
(3) Installation work must be performed in accordance with national wiring standards by authorized personnel only.
(4) Never cut the power cord, lengthen or shorten the cord, or change the plug. Do not use an extension cord.
(5) Plug in the power cord plug firmly. If the receptacle is loose, repair it before using the room air conditioner.
(6) Do not turn on the power until all installation work is done.
Please ask the dealer or specialist to install, never try by the users themselves. After the installation please be sure of the
following conditions.
Please call dealer to install the air-conditioner. Incorrect installation may ca se water leaking, shock and fire
hazard.
Air-conditioner can't be installed in the environment with inflammable gases beca se the inflammable gases
near air-conditioner may ca se fire hazard.
Installed electrical-leaking circ it breaker.
It easily cause electrical shock without circuit breaker.
Connect earthing wire.
Earthing wire should not be connected to the gas pipe, water pipe, lightning rod or phone line, incorrect earthing
may cause shock.
Use discharge pipe correctly to ens re efficient discharge.
Incorrect pipe use may cause water leaking.
Wiring
Air-conditioner should be equipped with special power supply wire.
Location
Air-conditioner should be located in well-vented and easily accessible place.
Air-conditioner should not be located in the following places:
(1) Places with machine oils or other oil vapours.
(2) easide with high salt content in the air.
(3) Near hot spring with high content of sulfide gases.
(4) Area with frequent fluctuation of voltage e.g. factory, etc.
(5) In vehicles or ships.
(6) Kitchen with heavy oil vapour or humidity.
(7) Near the machine emitting electric-magnetic waves.
(8) Places with acid, alkali vapour.
Choose the following locations:
(1) Capable of supporting air conditioner weight. Don't increase operating noise and vibration.
(2) Hot vapour from outdoor unit outlet and operating noise don't disturb neighbour.
(3) No obstacles around the outdoor unit outlet.
TV, radio, acoustic appliances etc. are at least 1 m far away from the indoor unit, outdoor unit, power supply wire,
connecting wire, pipes, otherwise images may be disturbed or noises be created.
As required, take measures against heavy snow.
Earthing
For a thorized sevice personnel only
(1) Be careful not to scratch the room air conditioner when handing it.
(2) After installation, explain correct operation to the customer, according to the operating manual.
(3) Let the customer keep this installation manual because it will be used when the room air conditioner is serviced or moved.
CAUTION
WARNING
CAUTION
WARNING
13
Installation Proced re Installation Preca tion

14
Installation Proced re Indoor Unit
SELECTING THE MOUNTING POSITION
WARNING
CAUTION
Do not install the unit where there is the danger of combustible gas leakage.
Do not install near heat sources.
If children under 10 years old may approach the unit, take preventive measures so that they cannot reach the unit.
Install at a place that can withstand the weight of the indoor unit and install it positively so that the unit will not topple or
fall.
(1) Install the indoor unit level on a strong wall which is not subject to vibration.
(2) The inlet and outlet ports should not be obstructed, and the air should be able to blow all over the room.
(3) Do not install the unit where it will be exposed to direct sunlight
(4) Install the unit where connection to the outdoor unit is easy.
(5) Install the unit where the drain pipe can be easily installed.
(6) Take servicing, etc. into consideration and leave the spaces shown in "Maintenace space dimension" .
(7) Install the unit where the filter can be removed
ACCESSORIES FOR INSTALLATION
The following installation parts are optional parts. Use them as required.
Decide the mo nting position with the c stomer as follows.
For half concealed installation
Ceiling
INDOOR UNIT
>3"(80mm) >6"(150mm) >0.4"(10mm)
Ceiling panel
INDOOR UNIT
>3"(80mm) >6"(150mm) >0.4"(10mm)
Ceiling panel
For ceiling installation
Optional parts
Adhesive tape
addle (L. ) with screws
Drain hose
Heat insulation material
Piping hole cover
Putty
Plastic clamp
MAINTENANCE SPACE DIMENSION

15
Installation Proced re Indoor Unit
INSTALLING THE INDOOR UNIT
Connection pipe req irement
Install the room air conditioner as follows
1. Remove the intake grill and side cover
(1) Remove the Air filters
(2) Remove the intake grilles
(3) Remove the ide cover (Right and left side)
2. Location of ceiling s pension bolts
For half-concealed installation
upension-bolt pitch should be as shown below
Ceiling Opening:Amm40mm 40mm
Ceiling panel
Ceiling Opening
640mm
Ceiling panel
15mm
uspension bolt should
extend outward 30 to 50mm.
uspension bolt pitch Amm
30mm 30mm
INDOOR UNIT (TOP VIEW)
Dimensions ( pace Required for
installation)
10mm
155mm
300mm
ide cover A (Right side) ide cover A (Left side)
Intake grille
Air filter
uspension bolt should
extend outward 30 to 50mm.
YIFFXC030BAEFA
YIFFXC036BAEFA
YIFFXC036BANFA
YIFFXC040BAEFB
YIFFXC040BANFA
Model
Diameter
Liquid side Gas side Maximum length Maximum height
(between indoor and outdoor)
9.52 mm 15.88mm 30 m 10m
19.05mm 30 m
9.52 mm 19.05mm 30 m
9.52 mm
9.52 mm 19.05mm 50 m
10m
15m
20m
YIFFYC030BAEFA
YIFFYC036BAEFA
YIFFYC036BANFA
YIFFYC040BAEFB
YIFFYC040BANFA
YIFFYC025BAEFA
Dimensions A(mm)
Model
1248
1530
YIFFXC025BAEFA

16
Installation Proced re
3. Drilling the holes and attaching the s spension bolts
If sing anchor bolts
(1) Drill holes for anchor bolts at the locations at which you will set the suspension bolts. Note that anchor bolts must be
obtained locally.
(2) Install the anchor bolts, then temporarily attach special nut "B" (included) and a locally-procured M10 nut to each of
the bolts.
Anchor-bolt strength: 980 to 1470 N (100 TO 150 kgf)
4.Installing the indoor nit
(1) Lift unit so that suspension bolts pass through suspension fittings at
the sides (four places),and slide the unit back.
(2) Fasten the indoor unit into place by tightening-up the special "B" bolts
and the M10 nuts. Make sure that unit is secure and will not shift
back and forth.
Ceiling panel
10 to 15 mm
pecial nut A (included)
M10 nut (Obtained locally)
pecial nut B (included)
(1) Drill 25mm holes at the suspension-bolt locations. The two special nuts are
provided with the unit. The M10 nut must be obtained locally.
(2) Install the bolts, then temporarily attach pecial nuts A and B and a normal
M10 nut to each bolt.
Bolt strength: 980 to 1470 N (100 TO 150 kgf)
M10 Nut
(Obtaied locally)
pecial nut B(included)
10 to 15 mm
M10 Nut (Obtaied locally)
5.Installing the co pler heat ins lation
After checking for gas leaks, insulate by wrapping insulation around the two parts (large and small) of the indoor unit
coupling, using the coupler heat insulation. After installling the coupler heat insulation, wrap both ends with vinyl tape so
that there is no gap. ecure both ends of the heat insulation material using nylon fasteners.
Indoor unit
Nylon fastener (large)
Nylon fastener (small)
No gap
Coupler heat
insulation
Coupler heat insulation(large)
Coupler pipe (large)
Coupler pipe (small)
Coupler heat insulation(small)
Indoor unit
For half-concealed installation
In order to check the drainage, be sure to use a level during installation
of the indoor unit. If the installation site of the indoor unit is not level,
water leakage may occur.
CAUTION
Ceiling panel
Wall
When installing the indoor unit in a semi-concealed orientation, make
sure to reinforce the insulation of the unit on all sides. Drops of water
may fall from the unit if it is not thoroughly insulated.
Glass wool insulate
(10 to 20mm thick )
Indoor unit
(Top view)
Wall
Ceiling panel
Wall
Ceiling
When using an auxiliary pipe, make sure that the fastener used is insulated in the same way.
Note:
When installing the unit on the floor, fix the four rubber base feet in the accessories on the bottom plate of the unit with
four 4x16 screws and 4 flat washers, as the position in the figure.
A
The bottom plate of the unit.
4:1
A
rubber base foot
4x16 screw
flat washer
Indoor Unit

17
Installation Proced re Indoor Unit
INSTALLING THE DRAIN HOSE
Install the drain pipe with downward gradient (1/50 to 1/100) and so there are no rises or traps in the pipe.
Use general hard polyvinyl chloride pipe (VP25) (outside diameter 38 mm)
During installation of the drain pipe, be careful to avoid applying pressure to the drain point of the unit.
When the pipe is long, install supporters.
Do not perform air bleeding.
Always heat insulate (8mm or over thick) the indoor side of the drain pipe.
BAD
upporter 5 to 6.5 ft
(1.5 to 2m)
(1) Install ins lation for the drain pipe
Insulation for Drain pipe
(To be obtained locally.
Length should be at least 8mm.)
Indoor unit (drain port)
Drain pipe insulation (accessories)
Drain pipe
Indoor unit
No gap 10mm or over
Drain pipe
Drain pipe insulation
GOOD BAD
Cut the included insulation material to an appropriate size and adhere it to the pipe.
Indoor unit
(Rear view)
Cable VT
drain pipe
Fasten the drain pipe with cable VT so that there is a proper slope for drain pipe to
exit from the indoor unit.
(2) When drain pipe is p t in the right rear position
Note:
When welding the pipe, please blow nitrogen to prevent oxidation, with abo t 2.9PSI press re of nitrogen flow.
Otherwise, the oxide can damage the o tdoor nit.

18
Installation Proced re O tdoor Unit
Note :
(1). Fix the parts with screws
(2). Don't intake the strong wind directly to the outlet air-flow hole.
(3). A one meter distance should be kept from the unit top
(4). Don't block the surroundings of the unit with sundries
(a) Concrete foundation (b) Foundation anchor
2. Selection of the place of installation
1. Accessories
"Edging" for protection of electric wires from an opening edge.
elect the place of installation satisfying the following conditions and, at the same time, obtain a consent from the client or
user.
Edging
Wind direction
NO
(2) Installation where the area with strong winds.
Install the unit so that the air outlet section of the unit must NOT be faced toward wind direction.
(1) Open space req irement aro nd the nit
L2
L3
L1
500
( ervicing
space)
Air outlet
Air inlet
Air
inlet
Case
Distance
Unit: mm
open open
open
500
150
150 300
300 0
L1
L2
L3
III III
Place where air circulates.
Place free from heat radiation from other heat sources.
Place where drain water may be discharged.
Place where noise and hot air may not disturb the neighborhood.
Place where there is not heavy snowfall in the winter time.
Place where obstacles do not exist near the air inlet and air outlet .
Place where the air outlet may not be exposed to a strong wind.
Place surrounded at four sides are not suitable for installation. A 1m or more of overhead space is needed for the unit.
Mount guide-louvers to place where short-circuit is a possibility.
When installing several units, secure sufficient suction space to avoid short circuiting.
3. Installation of o tdoor nit
Fix the unit in a proper way according to the condition of a place where it is installed by referring to the following .
(1) Installation
Anchor bolt
Concrete foundation
Unit
To fix by bolts
Unit
Anchor bolt
Concrete foundation

19
Installation Proced re O tdoor Unit
(a) Concrete foundation
(2) Installation sketch of o tdoor nit
Install the unit so that the angle of inclination must be less than 3 degrees.
Note:
Give enough room for the concrete foundation to fix by anchor bolts.
To fix by bolts
Concrete foundation
Unit
Anchor bolt
Note:
Place the concrete foundation deep enough.
(b) Foundation anchor
Unit
Concrete foundation
Anchor bolt
YIFFYC030BAEFA YIFFYC036BAEFA YIFFYC036BANFAYIFFYC025BAEFA
YIFFYC040BAEFB YIFFYC040BANFA
960
840
25
340 380
580
1008
830
646
410
447
950
1350
595
600
370
404
450

20
Installation Proced re O tdoor Unit
(2) Piping size
(1) Piping diagram
Connecting method (indoor unit)
Apply refrigerant oil at half union as large and flare nut.
To bend a pipe, give the roundness as possible not to crush the pipe.
When connecting pipe, hold the pipe centre to centre then screw nut on by hand, refer to Fig.
Be careful not to let foreign matters, such as sands enter the pipe.
(3) Piping connection
Forced fastening without centering may damage the threads and cause a gas leakage.
Pipe dia Fastening torque
Liquid pipe 6.35mm
Gas pipe 15.88mm
Liquid pipe 9.52mm
Gas pipe 19.05mm
14.2-17.2N.m
61.8-75.4N.m
32.7-39.9N.m
97.2-118.6N.m
Gas pipe 12.7mm 49.5-60.3N.m
Liquid pipe
Gas pipe
9.52x0.8mm
19.05x1.0mm
Liquid pipe 9.52x0.8mm
Gas pipe 15.88x1.0mm
Precautions for refrigerant piping
Do not twist or crush piping.
Be sure that no dust is mixed in piping.
Bend piping with as wide angle as possible.
Keep insulating both gas and liquid piping.
Check flare-connected area for gas leakage.
Install the removed flare nuts
to the pipes to be connected,
then flare the pipes.
90+0.5
4. Refrigerant piping
Outdoor
unit
Gas pipe
Liquid pipe
Flare connection
Indoor
unit
3-way stop valve
3-way stop valve
YIFFYC030BAEFA
YIFFYC036BAEFA
YIFFYC036BANFA
YIFFYC040BAEFB
YIFFYC040BANFA
YIFFYC025BAEFA