Airwell CDM Cassette AW-YDFA012-H91 User manual

IMPORTANT NOTE:
Read this manual carefully before installing or operating your new air conditioning unit. Make sure to
save this manual for future reference.
Installation Manual
CDM Cassette
R32 & R410A
20.AW.CDM.12-48.R32-R410A.IM.EN.06.03

Installation Manual
Accessories...................... .....................................................................08
Unit Parts................................................................................................10
Indoor Unit Installation.........................................................................11
Select installation location...........................................................................................................11
1.
Hang indoor unit..........................................................................................................................12
2.
3. Drill wall hole for connective piping.............................................................................................14
Connect drain hose.....................................................................................................................14
4.
Select installation location...........................................................................................................16
1.
Install drain joint..........................................................................................................................17
2.
1. Outdoor Uint Wiring......................................................................................................................23
2. Indoor Uint Wiring .........................................................................................................................24
Anchor outdoor unit.....................................................................................................................17
3.
Refriger ant Piping Connection...........................................................18
Note on Pipe Length..................................................................................................................18
A.
B. Connection Instructions – Refrigerant Piping.............................................................................19
1. Cut pipe..............................................................................................................................19
2. Remove burrs.....................................................................................................................20
3. Flare pipe ends...................................................................................................................20
4. Connect pipes.....................................................................................................................20
Air Evacuation......................................................................................26
1. Evacuation Instructions...............................................................................................................26
2. Note on Adding Refrigerant.........................................................................................................27
Panel Installation ..................................................................................28
T est Run.................................................................................................30
Installation Summary............................................................................09
Table of Contents
Safety Precautions .................................................................................04
Outdoor Unit Installation......................................................................16
Wiring....................................................................................................22

Safety
Precautions
Read Safety Precautions Before Operation and Installation
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
Incorrect installation due to ignoring instructions can cause serious damage or injury.
WARNING
This appliance can be used by children aged from 8 years and above and persons with reduced
This appliance is not intended for use by persons(including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible for their safety. Children
should be supervised to ensure that they do not play with the appliance(IEC Standard requirements).
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision(EN Standard requirements).
WARNINGS FOR PRODUCT USE
•
If an abnormal situation arises (like a burning smell), immediately turn o the unit and disconnect
the power. Call your dealer for instructions to avoid electric shock, re or injury.
•
Do not
insert fingers, rods or other objects into the air inlet or outlet. This may cause injury, since
the fan may be rotating at high speeds.
•
Do not
use flammable sprays such as hair spray, lacquer or paint near the unit. This may cause
fire or combustion.
•
Do not
operate the air conditioner in places near or around combustible gases. Emitted gas may
collect around the unit and cause explosion.
•
Do not
•
•
Do not
expose your body directly to cool air for a prolonged period of time.
•
•
If the air conditioner is used together with burners or other heating devices, thoroughly ventilate
the room to avoid oxygen deficiency.
Safety Precautions
Do not
allow children to play with the air conditioner. Children must be supervised around the
unit at all times.
operate your air conditioner in a wet room such as a bathroom or laundry room. Too
much exposure to water can cause electrical components to short circuit.
In certain functional environments, such as kitchens, server rooms, etc., the use of specially
designed air-conditioning units is highly recommended.
 Page 4
WARNING
This symbol indicates the possibility
of personnel injury or loss of life.
CAUTION
This symbol indicates the possibility of
property damage or serious consequences.

Safety
Precautions
 Page 5
•Do not
clean the air conditioner with combustible cleaning agents. Combustible cleaning agents
can cause re or deformation.
CLEANING AND MAINTENANCE WARNINGS
• Turn o the device and disconnect the power before cleaning. Failure to do so can cause
electrical shock.
•Do not
clean the air conditioner with excessive amounts of water.
CAUTION
• Turn o the air conditioner and disconnect the power if you are not going to use it for a long time.
• Turn o and unplug the unit during storms.
• Make sure that water condensation can drain unhindered from the unit.
•Do not operate the air conditioner with wet hands. This may cause electric shock.
•Do not use device for any other purpose than its intended use.
•Do not climb onto or place objects on top of the outdoor unit.
•Do not allow the air conditioner to operate for long periods of time with doors or windows open,
or if the humidity is very high.
ELECTRICAL WARNINGS
• Only use the specified power cord. If the power cord is damaged, it must be replaced by the
manufacturer , its service agent or similarly qualied persons in order to avoid a hazard.
• Keep power plug clean. Remove any dust or grime that accumulates on or around the plug. Dirty
plugs can cause re or electric shock.
•
•
•
•
•
•
•
Do not pull power cord to unplug unit. Hold the plug firmly and pull it from the outlet. Pulling
directly on the cord can damage it, which can lead to fire or electric shock.
Do not modify the length of the power supply cord or use an extension cord to power the unit.
Do not share the electrical outlet with other appliances. Improper or insucient power supply
can cause re or electrical shock.
If connecting power to xed wiring, an all-pole disconnection device which has at least 3mm
clearances in all poles, and have a leakage current that may exceed 10mA, the residual current
device(RCD) having a rated residual operating current not exceeding 30mA, and disconnection
must be incorporated in the xed wiring in accordance with the wiring rules.
For all electrical work, follow all local and national wiring standards, regulations, and the
Installation Manual. Connect cables tightly, and clamp them securely to prevent external forces
from damaging the terminal. Improper electrical connections can overheat and cause re, and may
also cause shock.
All electrical connections must be made according to the Electrical Connection
Diagram located on the panels of the indoor and outdoor units.
All wiring must be properly arranged to ensure that the control board cover can close properly. If
the control board cover is not closed properly, it can lead to corrosion and cause the connection
points on the terminal to heat up, catch re, or cause electrical shock.
The product must be properly grounded at the time of installation, or electrical shock may occur.
TAKE NOTE OF FUSE SPECIFICATIONS
The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent protection.
The specifications of the fuse are printed on the circuit board ,such as :
Indoor unit: T3.15A/250VAC, T5A/250VAC, etc.
Outdoor unit:T20A/250VAC(<=24000Btu/h units), T30A/250VAC(>24000Btu/h units)
NOTE: For the units with R32 or R290 refrigerant , only the blast-proof ceramic fuse can be used.

Safety
Precautions
 Page 6
WARNINGS FOR PRODUCT INSTALLATION
1. Installation must be performed by an authorized dealer or specialist. Defective installation can
cause water leakage, electrical shock, or re.
2. Installation must be performed according to the installation instructions. Improper installation
can cause water leakage, electrical shock, or re.
(In North America,installation must be performed in accordance with the requirement of NEC
and CEC by authorized personnel only.)
3.
Contact an authorized service technician for repair or maintenance of this unit. This appliance
shall be installed in accordance with national wiring regulations.
4.
Only use the included accessories, parts, and specied parts for installation. Using non-standard
parts can cause water leakage, electrical shock, re, and can cause the unit to fail.
5.
6.
Install the unit in a rm location that can support the unit’s weight. If the chosen location cannot
support the unit’s weight, or the installation is not done properly, the unit may drop and cause
serious injury and damage.
7.
8.
9.
10.
11.
Do not turn on the power until all work has been completed.
When moving or relocating the air conditioner, consult experienced service technicians for
disconnection and reinstallation of the unit.
How to install the appliance to its support, please read the information for details in "indoor unit
installation" and "outdoor unit installation" sections .
For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of
any combustible materials.
Do not install the unit in a location that may be exposed to combustible gas leaks. If
combustible
gas accumulates around the unit, it may cause re.
Install drainage piping according to the instructions in this manual. Improper drainage may
cause water damage to your home and property.
Note about Fluorinated Gasses
1.
This air-conditioning unit contains fluorinated greenhouse gasses. For specific information
on the type of gas and the amount, please refer to the relevant label on the unit itself or at
the page 27 of this manual.
2. Installation, service, maintenance and repair of this unit must be performed by a certified
technician.
3. Product uninstallation and recycling must be performed by a certified technician.
4. For equipment that contains fluorinated greenhouse gases in quantities of 5 tonnes of CO2
equivalent or more, but of less than 50 tonnes of CO2 equivalent, If the system has a leak
detection system installed, it must be checked for leaks at least every 24 months.
5. When the unit is checked for leaks, proper record-keeping of all checks is strongly
recommended.

Safety
Precautions
Page 7 
WARNING for Using R32
When ammable refrigerant are employed, appliance shall be stored in a well -ventilated area
where the room size corresponds to the room area as speciec for operation.
For R32 frigerant models:
Appliance shall be installed, operated and stored in a room with a oor area larger than
X m² .
Appliance shall not be installed in an unvertilated space, if that space is smaller than
X m²
(Please see the following form) .
Reusable mechanical connectors and ared joints are not allowed indoors.
(EN Standard Requirements).
Mechanical connectors used indoors shall have a rate of not more than 3g/year at 25%
of the maximum allowable pressure. When mechanical connectors are reused indoors,
sealing parts shall be renewed. When ared joints are reused indoors, the are part
shall be re-fabricated. (UL Standard Requirements)
When mechanical connectors are reused indoors, sealing parts shall be renewed. When
ared joints are reused indoors, the are part shall be re-fabricated.
(IEC Standard Requirements)
European Disposal Guidelines
This appliance contains refrigerant and other potentially hazardous materials. When disposing of
this appliance, the law requires special collection and treatment. Do not dispose of this product as
household waste or unsorted municipal waste.
When disposing of this appliance, you have the following options:
•Dispose of the appliance at designated municipal electronic waste collection facility.
•When buying a new appliance, the retailer will take back the old appliance free of charge.
•The manufacturer will take back the old appliance free of charge.
•Sell the appliance to certied scrap metal dealers.
Special notice
Disposing of this appliance in the forest or other natural surroundings endangers your health and is bad
for the environment. Hazardous substances may leak into the ground water and enter the food chain.
Correct Disposal of This Product
(Waste Electrical & Electronic Equipment)
This marking shown on the product or its literature, indicates that waste electrical and
eletrical equipment should not be mixed with general household waste.
Amount of refrigerant
to be charged (kg) Installation height Minimum room
area (m²)
≤ 1.11 2.2m 1
≤1.65 2.2m 2
≤2.58 2.2m 5
≤3.08 2.2m 7
≤3.84 2.2m 10
≤4.24
Model
(Btu/h)
≤ 12000
18000
24000
30000
36000
42000-48000 2.2m 12
≤4.39 60000 2.2m 13

Page 8 
Accessories
The air conditioning system comes with the following accessories. Use all of the installation parts and
accessories to install the air conditioner. Improper installation may result in water leakage, electrical
shock and re, or cause the equipment to fail. The items are not included
with the air conditioner must be purchased separately.
Name
Shape Quantity(PC)
Manual
Parts you must purc hase
separately. Consult the dealer
about the proper pipe size of
the unit you purchased.
Connecting pipe
assembly
Liquid side
Gas side
Φ6.35(1/4in)
Φ9.52(3/8in)
Φ12.7(1/2in)
Φ9.52(3/8in)
Φ12.7(1/2in)
Φ16(5/8in)
Φ19(3/4in)
Φ22(7/8in)
2~4
1
Name of Accessories
Q‘ty(pc) Shape
1
1
1
1
1
Name of Accessories
Q‘ty(pc) Shape
Soundproof/insulation
sheath
1
Soundproof/insulation
sheath
Outlet pipe sheath
Outlet pipe clasp
Drain joint
Seal ring
Magnetic ring (wrap
the electric wires S1
& S2 ( P & Q & E )
around the magnetic
ring twice)
(some models)
Magnetic ring (Hitch
it on the connective
cable between indoor
unit and outdoor unit
after installation.)
(some models)
S1&S2(P&Q&E)
Copper nut 2
Accessories
P Q E
Installation paper
template
1
Ceiling hook
4
Suspension bolt 4
Anti-shock rubber 1
Varies
by model
Remote controller
1
2
Battery
Remote controller
holder
1
Fixing screw for
remote controller
holder
2

Page 9 
Installation Summary
Install the outdoor unitInstall the drainpipe
L N
123
4
5
MC MC
6
Install the indoor unit
Evacuate the refrigeration
system Connect the wires Connect the refrigerant pipes
Perform a test run
78
Install the front panel
Installation Summary

Unit Parts
NOTE ON ILLUSTRATIONS
Illustrations in this manual are for explanatory purposes. The actual shape of your indoor
unit may be slightly dierent. The actual shape shall prevail.
NOTE: The installation must be performed in accordance with the requirement of local and
national standards. The installation may be slightly dierent in dierent areas.
Page 10

Unit Parts
Display panel
Drain pipe
Front grille
Connecting pipe
Air inlet
Air outlet
Remote controller
Air outlet
Air inlet
1
2 4 3 6
7
8
8
9
5
1
2
3
4
5
6
7
8
9

Page 11

Indoor Unit Installation
Installation Instructions – Indoor unit
Indoor Unit Installation
NOTE: Panel installation should be performedafter piping and wiring have been completed.
Recommended distances between the indoor unit and the ceiling
The distance between the mounted indoor unit and the internal ceiling should meet the following
specifications.
Step 1: Select installation location
Before installing the indoor unit, you must
choose an appropriate location. The following
are standards that will help you choose an
appropriate location for the unit.
Proper installation locations meet the
following standards:
Enough room exists for installation and
maintenance.
Enough room exists for the connecting the
pipe and drainpipe.
The ceiling is horizontal and its structure can
sustain the weight of the indoor unit.
The air inlet and outlet are not blocked.
The airflow can fill the entire room.
There is no direct radiation from heaters.
DO NOT install unit in the following
locations:
Areas with oil drilling or fracking
Coastal areas with high salt content in the
air
Areas with caustic gases in the air, such as
hot springs
Areas that experience power uctuations,
such as factories
Enclosed spaces, such as cabinets
Kitchens that use natural gas
Areas with strong electromagnetic waves
Areas that store flammable materials or gas
Rooms with high humidity, such as
bathrooms or laundry rooms
A
Front panel
Ground
Ceiling board
>2.5m / 8.2’
B (Ceiling hole)
Ceiling

TYPE
Compact models
Page 12 
Indoor Unit Installation
Step 2: Hang indoor unit
Distance from ceiling relative to height of indoor unit
MODEL Length of A (mm/inch) Length of H (mm/inch)
24K 245/9.6 >275/10.8
36K 245/9.6 >275/10.8
48K 287/11.3 >317/12.5
Length of B (mm/inch)
880/34.5
Slim models
260/10.2 >290/11.4 600/23.6
1. Use the included paper template to cut a rectangular hole in the ceiling, leaving at least 1m (39”)
on all sides. The cut hole size should be 4cm(1.6”) larger than the boby size.
Be sure to mark the areas where ceiling hook holes will be drilled.
24k-48K Slim models ceiling hole size
Refrigerant piping side Drain hose side
78cm / 30” (Suspension bolt)
84cm / 33”(Body)
95cm / 37.4”(Ceiling opening)
68cm / 26”
(Suspension bolt)
84cm / 33” (Body)
95cm / 37.4” (Ceiling opening)
Compact models ceiling hole size
545mm / 21.5” (Suspension bolt)
570mm / 22.4”(Body)
647mm / 25.5”(Ceiling opening)
523mm / 20.6”
(Suspension bolt)
570mm / 22.4” (Body)
647mm / 25.5” (Ceiling opening)
Refrigerant piping side
Drain hose side
>1m / 39”
>1m / 39”
>1m / 39”
>1m / 39”
09K & 12K & 18K

Page 13
Indoor Unit Installation
CAUTION
The unit body should align perfectly with the
hole. Ensure that the unit and the hole are the
same size before moving on.
2. Drill 4 holes 5cm (2”) deep at the ceiling hook
positions in the internal ceiling. Be sure to hold
the drill at a 90° angle to the ceiling.
3. Using a hammer, insert the ceiling hooks into
the pre-drilled holes. Secure the bolt using the
included washers and nuts.
4. Install the four suspension bolts.
5. Mount the indoor unit. You will need two
people to lift andsecure it. Insert suspension
bolts into the unit’s hanging holes. Fasten
them using the included washers and nuts.
NOTE: The bottom of the unit should be
10-18mm(0.4-0.7”)( Slim models ) or 24mm
(0.9”)(Compact models) higher than the
ceiling board. Generally, L (indicated in the
following figure) should be half the length of
the suspension bolt or long enough to
prevent the nuts from coming off.
NOTE: Ensure that the indoor unit is level.
The unit is equipped with a built-in drain
pump and oat switch. If the unit is tilted
against the direction of condensate ows
(the drainpipe side is raised), the oat switch
may malfunction and cause water to leak.
Water level
CAUTION
Ensure that the unit is completely level.
Improper installation can cause the drain pipe
to back up into the unit or water leakage.
Wall
Ceiling board
Main body
or 24mm (0.9”)
L
10 - 18mm (0.4-0.7”)

Page 14 
Indoor Unit Installation
Step 4: Connect drain hose
The drainpipe is used to drain water away from
the unit. Improper installation may cause unit
and property damage.
CAUTION
•Insulate all piping to prevent condensation,
which could lead to water damage.
•If the drainpipe is bent or installed
incorrectly, water may leak and cause a
water-level switch malfunction.
•In HEAT mode, the outdoor unit will
discharge water. Ensure that the drain hose
is placed in an appropriate area to avoid
water damage and slippage.
•DO NOT pull the drainpipe forcefully. This
could disconnect it.
NOTE ON PURCHASING PIPES
Installation requires a polyethylene tube
(exterior diameter = 3.7-3.9cm, interior
diameter = 3.2cm), which can be obtained at
your localhardware store or dealer.
NOTE FOR NEW HOME INSTALLATION
When installing the unit in a new home, the
ceiling hooks can be embedded in advance.
Make sure that the hooks do not come loose
due to concrete shrinkage. After installing the
indoor unit, fasten the installation paper
template onto the unit with bolts to
determine in advance the dimension and
position of the opening on the ceiling.
Follow the instructions above for the
remainder of the installation.
Step 3: Drill wall hole for connective piping
1. Determine the location of the wall hole
based on the location of the outdoor unit.
2. Using a 65mm (2.5in) or 90mm(3.54in)
(depending on models )core drill, drill a
hole in the wall. Make sure that the hole
is drilled at a slight downward angle, so
that the outdoor end of the hole is lower
than the indoor end by about 12mm (0.5in).
This will ensure proper water drainage.
3. Place the protective wall cu in the hole. This
protects the edges of the hole and will help
seal it when you nish the installation process.
CAUTION
When drilling the wall hole, make sure to
avoid wires, plumbing, and other sensitive
Wall
IndoorOutdoor
≈ 12mm / 0.5 inch
Paper pattern for
installation
(on some models)
Center of the
ceiling openiing
bolts

Page 15
Indoor Unit Installation
NOTE ON DRAINPIPE INSTALLATION
•When using an extended drainpipe, tighten
the indoor connection with an additional
protection tube to prevent it from pulling
loose.
•The drainpipe should slope downward at a
gradient of at least 1/100 to prevent water
from owing back into the air conditioner.
•To prevent the pipe from sagging, space
hanging wires every 1-1.5m (39-59”).
Indoor Drainpipe Installation
Install the drainpipe as illustrated in the following
Figure.
NOTE: When connecting multiple drainpipes,
install the pipes as illustrated in the following
Figure.
Pass the drain hose through the wall hole.
Make sure the water drains to a safe location
where it will not cause water damage or a
slipping hazard.
NOTE: The drainpipe outlet should be at least
5cm (1.9”) above the ground. If it touches the
ground, the unit may become blocked and
malfunction. If you discharge the water directly
into a sewer, make sure that the drain has a U
or S pipe to catch odors that might otherwise
come back into the house.
Drainpipe
connecting port
Drain hose
Metal clamp Insulation
Downward slope
1/100
1-1.5m
(39-59”)
If the outlet of the drainpipe is higher than
the body’s pump joint, provide a lift pipe for
the exhaust outlet of the indoor unit. The
lift pipe must be installed no higher than
75cm (29.5”) from the ceiling board and
the distance between the unit and the lift
pipe must be less than 30cm (11.8”).
Incorrect installation could cause water to
flow back into the unit and flood.
To prevent air bubbles, keep the drain hose
level or slightly tiled up (<75mm / 3”).
•
•
≤75cm
(29.5”)
Ceiling
1 - 1.5m
(39-59”)
0 - 75mm
(3”)
≤30cm (11.8”)
≤53cm
(20.8”)
22cm
(8.6”)
0-53cm
(20.8”)
≥10cm
(4”)

Page 16 
Outdoor Unit
Installation
evoba)ni42(mc06
60cm (24in)
on righ t
30cm (12in)
on left
200cm (79in)
in fron t
30cm (12in)
from back wall
Installation Instructions – Outdoor unit
Step 1: Select installation location
Before installing the outdoor unit, you must
choose an appropriate location. The following
are standards that will help you choose an
appropriate location for the unit.
Proper installation locations meet the
following standards:
Meets all spatial requirements shown in
Installation Space Requirements above.
Good air circulation and ventilation
Firm and solid—the location can support the
unit and will not vibrate
Noise from the unit will not disturb others
Install the unit by following local codes and
regulations , there may be dier slightly
between dierent regions.
Protected from prolonged periods of direct
sunlight or rain
SPECIAL CONSIDERATIONS FOR EXTREME
WEATHER
If the unit is exposed to heavy wind:
Install unit so that air outlet fan is at a 90°
angle to the direction of the wind. If needed,
build a barrier in front of the unit to protect it
from extremely heavy winds.
See Figures below.
Strong
wind
Strong wind
Strong wind
Wind Baffle
DO NOT
installunit in the following locations:
Near an obstacle that will block air inlets
and outlets
Near a public street, crowded areas, or
where noise from the unit will disturb others
Near animals or plants that will be harmed
by hot air discharge
Near any source of combustible gas
In a location that is exposed to large
amounts of dust
In a location exposed to a excessive amounts
of salty air
Where snowfall is anticipated, raise the
unit above the base pad to prevent ice
buildup and coil damage. Mount the unit
high enough to be above the average
accumulated area snowfall. The minimum
height must be 18 inches
Outdoor Unit Installation
If the unit is frequently exposed to heavy
rain or snow:
Build a shelter above the unit to protect
it from the rain or snow. Be careful not to
obstruct air flow around the unit.
If the unit is frequently exposed to salty air
(seaside):
Use outdoor unit that is specially designed to
resist corrosion.

Page 17

Outdoor Unit
Installation
Step 2: Install drain joint
Before bolting the outdoor unit in place, you must
install the drain joint at the bottom of the unit.
Note that there are two dierent types of drain
joints depending on the type of outdoor unit.
If the drain joint comes with a rubber seal
(see Fig. A ), do the following:
1. Fit the rubber seal on the end of the drain joint
that will connect to the outdoor unit.
2. Insert the drain joint into the hole in the base
pan of the unit.
3. Rotate the drain joint 90° until it clicks in place
facing the front of the unit.
4. Connect a drain hose extension (not included)
to the drain joint to redirect water from the
unit during heating mode.
If the drain joint doesn’t come with a rubber
seal (see Fig. B ), do the following:
1. Insert the drain joint into the hole in the base
pan of the unit. The drain joint will click in
place.
2. Connect a drain hose extension (not included)
to the drain joint to redirect water from the
unit during heating mode.
Seal
Drain joint
(A) (B)
Base pan hole of
outdoor unit
Seal
IN COLD CLIMATES
In cold climates, make sure that the drain
hose is as vertical as possible to ensure
swift water drainage. If water drains too
slowly, it can freeze in the hose and ood
the unit.
The outdoor unit can be anchored to the
ground or to a wall-mounted bracket with
bolt(M10). Prepare the installation base of
the unit according to the dimensions below.
Step 3: Anchor outdoor unit
UNIT MOUNTING DIMENSIONS
The following is a list of dierent outdoor
unit sizes and the distance between their
mounting feet. Prepare the installation
base of the unit according to the
dimensions below.
Split Type Outdoor Unit
A
B
D
W
H
W
H
Outdoor Unit Types and Specifications

Page 18 
Refrigerant piping
Connection
Note on Pipe Length
When connecting refrigerant piping, do not let substances or gases other than the specied
refrigerant enter the unit. The presence of other gases or substances will lower the unit’s capacity,
and can cause abnormally high pressure in the refrigeration cycle. This can cause explosion and
injury.
Refrigerant Piping Connection
Ensure that the length of the refrigerant pipe, the number of bends, and the drop height
between the indoor and outdoor units meets the requirements shown in the following table :
The Maximum Length And Drop Height Based on Models. (Unit: m/ft.)
L
H
300 cm / 118” or more
A
60 cm / 23.6”
or more
150 cm / 59”
or more
25 cm / 9.8”
or more
25 cm / 9.8”
or more
Rows of series installation
L ≤H L ≤1/2H
L A
25 cm / 9.8” or more
1/2H < L ≤H 30 cm / 11.8” or more
L >H Can not be installed
The relations between H, A and L are
as follows.
(unit: mm/inch)
Outdoor Unit Dimensions
W x H x D
Mounting Dimensions
Distance A Distance B
946x810x410 (37.24x31.9x16.14) 673 (26.5) 403 (15.87)
952x1333x415 (37.5x52.5x16.34) 634 (24.96) 404 (15.9)
845x702x363 (33.27x27.6x14.3) 540 (21.26) 350 (13.8)
800x554x333 (31.5x21.8x13.1) 514 (20.24) 340 (13.39)
Type of model Capacity (Btu/h) Length of piping Maximum drop height
YDFA
&
YMD
12K25/82 10/32.8
18K 30/98.4 20/65.6
24K 50/164 25/82
36K & 48K & 60K 65/213 30/98.4

Page 19 
Refrigerant piping
Connection
Connection Instructions –
Refrigerant Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take extra
care to cut and flare them properly. This will
ensure efficient operation and minimize the
need for future maintenance.
1. Measure the distance between the indoor
and outdoor units.
2. Using a pipe cutter, cut the pipe a little longer
than the measured distance.
3. Make sure that the pipe is cut at a perfect 90°
angle.
The outdoor unit is installed higher than the
indoor unit
CAUTION
If the outdoor unit is installed higher than the
indoor unit:
-It is recommended that vertical suction risers
not be upsized. Proper oil return to the
compressor should be maintained with suction
gas velocity. If velocities drop below7.62m/s
(1500fpm (feet per minute)), oil return will be
decreased. An oil trap should be installed every
6m(20ft) of vertical suction line riser.
CAUTION
•The branching pipe must be installed
horizontally. An angle of more than 10° may
cause malfunction.
•DO NOT install the connecting pipe until
both indoor and outdoor units have been
installed.
•Insulate both the gas and liquid piping to
prevent water leakage.
Oil traps
CAUTION
•
If the indoor unit is installed higher than the
outdoor unit:
An oil trap should be installed every 10m
(32.8ft) of vertical suction line riser.
-If oil flows back into the outdoor unit’s
compressor, this might cause liquid
compression or deterioration of oil return.
Oil traps in the rising gas piping can prevent
this.
The indoor unit is installed higher than the
outdoor unit

Page 20 
Refrigerant piping
Connection
Oblique Rough Warped
90°
DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, dent, or
deform the pipe while cutting. This will
drastically reduce the heating eciency
of the unit.
Step 3: Flare pipe ends
Proper aring is essential to achieve an airtight
seal.
1. After removing burrs from cut pipe, seal
the ends with PVC tape to prevent foreign
materials from entering the pipe.
2. Sheath the pipe with insulating material.
3. Place are nuts on both ends of pipe.
Make sure they are facing in the right
direction, because you can’t put them on
or change their direction after flaring.
Flare nut
Copper pipe
4. Remove PVC tape from ends of pipe when
ready to perform aring work.
5. Clamp are form on the end of the pipe.
The end of the pipe must extend beyond
the are form.
Flare form
Pipe
Step 2: Remove burrs.
Burrs can aect the air-tight seal of refrigerant
piping connection. They must be completely
removed.
1.
Hold the pipe at a downward angle to
prevent burrs from falling into the pipe.
2. Using a reamer or deburring tool, remove
all burrs from the cut section of the pipe.
Pipe
Reamer
Point down
6. Place aring tool onto the form.
7. Turn the handle of the aring tool
clockwise until the pipe is fully ared.
Flare the pipe in accordance with the
dimensions.
PIPING EXTENSION BEYOND FLARE FORM
8. Remove the aring tool and are form,
then inspect the end of the pipe for cracks
and even aring.
Step 4: Connect pipes
Connect the copper pipes to the indoor unit rst,
then connect it to the outdoor unit. You should
rst connect the low-pressure pipe, then the high-
pressure pipe.
1.
When connecting the are nuts, apply a
thin coat of refrigeration oil to the ared
ends of the pipes.
Pipe
gauge Tightening
torque Flare dimension (A) (Unit: mm/Inch) Flare shape
Min. Max.
Ø 6.35
R0.4~0.8
45°±2
90 °
±4
A
Ø 9.52
Ø 12.7
Ø 16
Ø 19
Ø 22
65-67 N.m
(663-683 kgf.cm) 23.2/0.91 23.7/0.93
75-85N.m
(765-867 kgf.cm) 26.4/1.04 26.9/1.06
18-20 N.m
(183-204 kgf.cm) 8.4/0.33 8.7/0.34
25-26 N.m
(255-265 kgf.cm) 13.2/0.52 13.5/0.53
35-36 N.m
(357-367 kgf.cm) 16.2/0.64 16.5/0.65
45-47 N.m
(459-480 kgf.cm) 19.2/0.76 19.7/0.78