Klimaire KIWU Series User manual

KIWU/KOIU
Mark of Superior Quality
IMPORTANT NOTE:
Read this manual carefully before installing
or operating your new air conditioning
unit. Make sure to save this manual for
future reference.
For more information please visit www.klimaire.com
Installation Manual
SMKIWU 23-01

TABLE OF CONTENTS
* The design and specificaons are subject to change without prior noce for product improvement.
Consult with the sales agency or manufacturer for details.
* The shape and posion of buons and indicators may vary according to the model, but their funcon
are the same.
SAFETY PRECAUTIONS
ACCESSORIES
PIPE LENGTH AND ADDITIONAL REFRIGERANT
INDOOR UNIT INSTALLATION
OUTDOOR UNIT INSTALLATION
AIR EVACUATION
REFRIGERANT
ELECTRICAL AND GAS LEAK CHECKS
TEST OPERATION
............................................................................................................................ 20
.................................................................................................................................. 21
................................................................................................22
............................................................................................................................23
..................................................................................................... 14
.................................................................................................................................. 5
................................................................................................................... 3
.........................................................................................................10
..................................................................... 6
UNIT PARTS AND INSTALLATION COMPONENTS
.................................................................. 7
SELECTING THE INSTALLATION PLACE
...................................................................................... 8

3
1.
2.
3.
4.
5.
6.
7.
This symbol indicates that ignoring instructions may cause moderate injury
to person, or damage to your unit or other property.
Safety Precautions
Read Safety Precautions Before Installation
CAUTION
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 insufficient power supply
can cause fire or electrical shock.
Do not let any substances or gases other than the specified refrigerant when connecting the
refrigerant piping to enter the unit. The presence of other gases or substances will lower the unit
capacity and can cause abnormally high pressure in the refrigeration cycle. this can cause
explosion and injury.
Do not
unit at all times.
This symbol indicates that you must never perform the action indicated.
Incorrect installation due to ignoring instructions can cause serious damage or injury.
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
DO NOT
Do not obstruct the air inlet or outlet of the indor or outdoor unit. Obstruction of these openings
causes a reduction of the operative efficiency of the air conditioner with possible consequent
failures or damages
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 fire.
Do not 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.
3. The product must be properly grounded at the time of installation, or electrical shock may occur.
1. Install drainage piping according to the instructions in this manual. Improper drainage may
cause water damage to your home and property.
2. Never insert your finger or a stick, etc into the air inlet or outlet.
Doing so coud cause damage to the unit or injury.

4
Safety Precautions
Installation Manual. You must use an independent circuit and single outlet to supply power. Do
not connect other appliances to the same outlet. Insufficient electrical capacity or defects in
electrical work can cause electrical shock or fire.
7. For all electrical work, use the specified cables. Connect cables tightly, and clamp them
securely to prevent external forces from damaging the terminal. Improper electrical connections
can overheat and cause fire, and may also cause shock.
8. 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 fire, or cause electrical shock.
9. In certain functional environments, such as kitchens, server rooms, etc., the use of specially
designed air-conditioning units is highly recommended.
Note about Fluorinated Gasses
1. T his air-conditioning unit contains fluorinated gasses. For specific information on the type of
of gas and the amount, please refer to the relevant label on the unit itself.
10. Electrical i nstallation, service, maintenance and repair of this unit must be performed by a certified
technician. Disconnect the power support to the air conditioning system during the procedure.
3. Product uninstallation and recycling must be performed by a certified technician.
4. I f the system has a leak-detection system installed, it must be checked for leaks at least every
12 months.
5. W hen the unit is checked for leaks, proper record-keeping of all checks is strongly
recommended.
6. For all electrical work, follow all local and national wiring standards, regulations, and the
This symbol indicates that ignoring instructions may cause death or serious
injury.
WARNING
1. Installation must be performed according to the installation instructions. Improper installation
can cause water leakage, electrical shock, or fire.
2. Contact an authorized service technician for repair or maintenance of this unit.
3. Only use the included accessories, parts, and specified parts for installation. Using non-
-Standard parts can cause water leakage, electrical shock, fire, and can cause the unit to fail.
4. Install the unit in a firm 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.
,,
5. Always operate the unit with air filter mounted. The use of air conditioner without a filter could
cause an ecessive accumulation of dust and lint on the coil & inner parts of the device with possible
subsequent failures

1
1
2
(used to be install on the front of air filter)
2
Clip anchor
Mounting plate fixing
screw
Remote controller
Healthy Air freshening filter
Drain joint
Mounting plate
6 pcs for 12K, 8 pcs for 24/36K
6 pcs for 12K, 8 pcs for 24/36K
2.75 inch
Mounting Paper Board
Template
1
Remote Control Holder
Remote Control Holder
Fixing Screw
Inerconnecting cable
Condensate Drain Hose
Extension
1
1
2
Vibration Pads
Plastic Wall Sleeve
4
1
Plastic Wall Cap
Wall Sealer Mastic
Decorative insullation tape
2
2
2
1
Name
Shape Quantity
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 fire, or cause the equipment to fail.
5
The accessories described herein may be different
for each model and the list is for reference only.
Outoor Unit

6
Torque Parameters
PIPE Size
1/4 ( 6.35)
3/8 ( 9.52)
1/2 ( 12)
5/8 ( 15.88)
Newton meter[N x m]
18 - 20
30 - 35
45 - 50
60 - 65
Pound-force foot (Ibf-) Kilogram-force meter (kgf-m)
24.4 - 27.1
40.6 - 47.4
61.0 - 67.7
81.3 - 88.1
2.4 - 2.7
4.1 - 4.8
6.2 - 6.9
8.2 - 8.9
Note: This table is only for reference, the installaon shall meet the requirements of local laws
and regulaons.
Pipe Length and Addional Refrigerant
Inverter Models Capacity (Btu/h)
9K-12K 18K-36K
Length of pipe with standard charge
Maximum distance between indoor and outdoor unit
Addional refrigerant charge
Max. diff. in level between indoor and outdoor unit
Type of refrigerant
Length of pipe with standard charge (Like: North American, etc.)
15m/49
10m/32
20g/m
R410A R32
15m/49
10m/32
15g/m
25m/82
10m/32
30g/m
R410A R32
25m/82
10m/32
25g/m
5m/16 5m/16 5m/16 5m/16
7.5m/247.5m/247.5m/247.5m/24
INSTALLATION MANUAL

NOTE ON ILLUSTRATIONS
Illustrations in this manual are for explanatory purposes. The actual shape of your indoor
unit may be slightly different. The actual shape shall prevail
national standards. The installation may be slightly different in different areas.
Wall Mounting Plate
Main Filter
Refrigerant Piping
Signal Cable
Remote Controller
Drainage Pipe
Louver
Remote controller Holder
(Some Units)
Functional Filter (On Back of
Main Filter - Some Units)
Front Panel
Outdoor Unit Power Cable
(Not included)
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
6
7
8
9
10
11
5
12
12
Disconnect Switch
(Not included)
UNIT PARTS AND INSTALLATION COMPONENTS
NOTE: The installation must be performed in accordance with the requirement of local and
INDOOR UNIT
OUTDOOR UNIT
7

OUTDOOR UNIT PLACE SELECTION
INSTALLATION MANUAL---Selecting the Installation Place
8
Install the indoor unit level on a strong wall that is not
subject to vibraons.
The inlet and outlet ports should not be obstructed: the
air should be able to blow all over the room.
Do not install the unit near a source of heat, steam, or
flammable gas.
Use stranded cable to interconnect indoor to outdoor unit
Do not install the unit where it will be exposed to
direct sunlight.
Install the unit where connecon between indoor and
outdoor unit is as easy as possible.
Install the unit where it is easy to drain the condensed
water, preferebly inside of an exterior wall.
Check the machine operaon regularly and leave the
necessary space (as shown in the picture).
Install the indoor unit where the filter can be easily
accessible.
Leave a 6" space on the top of the unit.
Do not install the outdoor unit near sources of heat,
steam or flammable gas.
Do not install the unit in too windy or dusty places.
Make sure that the base of the outdoor unit is firmly fixed.
Do not install the unit where people oen pass.Select
a place where the air discharge and operang sound
level will not disturb neighbours.
Avoid installing the unit where it will be exposed
to direct sunlight ( other wise use a protecon , if
necessary, that should not interfere with the air flow).
Leave space as shown in the picture for the air to
circulate freely.
Install the outdoor unit in a safe and solid place.
If the outdoor unit is subject to vibraon, place rubber
gaskets onto the feet of the unit.
Minimum space to be left showing in the
picture
INDOOR UNIT PLACE SELECTION
20
500mm
20
500mm
12
300mm
12
300mm
79
2000mm
condensed water drain pipe
Sleeve
insulating covering
electrical cable
Mounting plate
water drain pipe
5 in or
13 cm
6 in or
15 cm
The air condioner must be installed by professional or qualified Technicians. The equipment must be
installed in accordance with applicable naonal and local regulaons and Codes. Ensure that the power
supply voltage corresponds to that stamped on the rang plate. Do not obstruct the air inlet or outlet of
the indoor or the outdoor unit. The obstrucon of these openings causes a reducon in the operave
efficiency of the condioner with possible consequent failures or damages.
GENERAL
PRIOR TO INSTALLATION
Before installing the indoor unit, refer to the label on the product box to make sure that the voltage and
the model number of the indoor unit matches the voltage and the model mumber of the outdoor unit.
STEP 1: Before installing the indoor unit, you must choose an appropiate locaon.
The following are starndards that will help you choose an appropiate locaon for the unit.
5 in or
13 cm
7 ft or higher

INSTALLATION MANUAL---Selecting the Installation Place
be less than 16 ft
Height
should
Only persons and/or companies qualified and experienced in the installaon, service and repair of refrigerant
products should be permied to do so. The purchaser must ensure that the person and/or company who is to
install, service or repair this air condioner has qualificaons and experience in air condioning.
Outdoor unit
Indoor unit
Installation Diagram
Pipe length is
50' (15m)Max Outdoor unit
Indoor unit
be less than 16 ft
Height should
Pipe length is
50' (15m)Max
Note
Quick connect
piping kit 25 ft long
3.1 By using a level, put the mounng plate in a perfect
square posion vercally and horizontally.
3.2 Drill 1 1/4 inch deep holes in the wall to fix the
plate, following the screw remark;
3.3 Insert the plasc anchors into the hole;
3.4 Fix the mounng plate by the provided screws;
3.5. Check that the mounng plate is correctly fixed;
Before starng installaon, decide on the posion of the
indoor and outdoor units, taking into account the minim-
um space required around the units.
Install the indoor unit in the room to be air
avoiding in corridors or communal areas. condioned
Install the indoor unit at a height of at least 7  from the ground.
To install, proceed as follows:
Note : The shape of the mounng plate may be different
from the one above, but installaon method is similar .
Installation of the mounting plate
Check the top of indoor unit carton box, there is a quick-
installaon paper board, it is a guideline to find the screw
and hole drilling posion quickly.
2.75 inch
2.1) Place the paper board on the wall where the unit will be installed.
2.2) Use a level to align the paper board.
2.3) Mark the screw holes and center of drilling
hole on the wall with a screw or screwdriver
STEP 2: Using template
STEP 3:
Please adjust the layout beer leaving necessary spaces
9

INSTALLATION MANUAL - Indoor Unit installation
The copper pipe should be set through the wall to outside
when installing the indoor unit, for quick connecng
to be connected to the outdoor unit.
Run the piping in the direcon of the wall hole, and put
the drain pipe at the boom, then bind the copper pipes
and the drain pipe and the power cables together with
the tape, so that water can flow away freely.
Refrigerant piping setting position
Condensed water drain pipe
(at the bottom of bundle)
Sleeve
Insulating covering
Mounting plate
6 or
150mm 6 or
150mm
6 or
150mm
5.1
5.2
According to the wall hole posion, select the appropriate piping mode.
Connecting Refirgerant Pipe
In Piping Mode 1 or Piping Mode 3, a notch should be made by using scissors to cut the plasc
3
2
1
Piping outlet
Cable outlet
Standard through the wall
Note : Keep the drain pipe down towards the direcon
of the wall hole, otherwise leakage may occur.
4.1 Drill the hole in the wall for the copper pipe crossing,
following the quick-installaon paper board marked
suggested diameter is 2-3/4 in.
4.2 Set a flexible flange through the hole in the wall to
keep the laer intact and clean.
The hole must slope downwards towards the exterior.
Front
panel
Terminal block
cover
wiring
diagram
Drilling a hole in the wall for the piping
4.3 Insert the round plasc wall sleeeve into the hole
4.4 If the sleeve scks out cut the plasc sleeve with ulity knife
to be flush with wall.
4.5 Insert the sleeve cap on the exterior part fo the wall
Wall
Indoors Outdoors
5-7mm
(0.2-0.3in)
Indoors
Outdoors
STEP 4:
10
STEP 5:
STEP 6:

INSTALLATION MANUAL - Indoor Unit installation
Adjust the drainage hose(if applicable)
In some model, both sides of the indoor unit
are provided with drainage ports, you can choose
one of them to attache the drainage hose.
And plug the unused drain port with the rubber
attached in one of the ports.
Connect Drainage Hose
Drainage ports
7.1 Take off the plasc cover in the pipe ports and take off the protecve cover on the end of piping
connectors.
7.2 Check whether there is any sundry on the port of the connecng pipe and make ensure the port
is clean.
7.3 Aer align the center, rotate the flare nut of the connecng pipe to ghten the flare nut as ghtly
as possible by hand.
7.4 Use a torque wrench to ghten it according to the torque values in the torque requirements table;
(Refer to the torque requirements table on secon INSTALLATION PRECAUTIONS)
7.5 Wrap the joint with the insulaon pipe.
Do not remove the cap from the pipe unl connecng
it, to avoid dampness or dirt from entering.
If the pipe is bent or pulled too oen, it will become
sff. Do not bend the pipe more than three mes at
one point.
When extending the rolled pipe, straighten the pipe by
unwinding it gently as shown in the picture.
Unrolling the pipes
NO
YES
Extending the rolled pipe
11
STEP 7:
STEP 8:
IMPORTANT
Indoor unit condensate water drainage
By default, the drain hose is aached to the le-
hand side of unit (when you’re facing the back
of the unit). However, it can also be aached to
the right-hand side. To ensure proper drainage,
aach the drain hose on the same side that your
refrigerant piping exits the unit. Aach drain hose
extension (purchased separately) to the end of
drain hose.
Wrap the connecon point firmly with Teflon
tape to ensure a good seal and to prevent leaks.
Remove the air filter and pour a small amount
of water into the drain pan to make sure that
water flows from the unit smoothly.
NOTE ON DRAIN HOSE
PLACEMENT
Make sure to arrange the drain hose
according to the following figures.
.
PLUG THE UNUSED DRAIN HOLE
o prevent unwanted leaks you must
plug the unused drain hole with the
rubber plug provided.
CORRECT
Make sure there
are no kinks
or dent in drain
hose to ensure
proper drainage.
NOT CORRECT
Kinks in the
drain hose
will create
water traps.
NOT CORRECT
Do not place the
end of the drain
hose in water or in
containers that
collect water.
This will prevent
proper drainage.
NOT CORRECT
Kinks in the
drain hose
will create
water traps.
For the poron of the drain hose that will remain
indoors, wrap it with foam pipe insulaon to
prevent condensaon.

INSTALLATION MANUAL - Indoor Unit installation
12
BEFORE PERFORMING ANY
ELECTRICAL WORK, READ
THESE REGULATIONS
1. All wiring must comply with local and naonal
electrical codes, regulaons and must be
installed by a licensed electrician.
2. All electrical connecons must be made
according to the Electrical Connecon Diagram
located on the panels of the indoor and outdoor
units.
3. If there is a serious safety issue with the power
supply, stop work immediately. Explain your
reasoning to the client, and refuse to install the
unit unl the safety issue is properly resolved.
4. Power voltage should be within 90-110% of
rated voltage. Insufficient power supply can
cause malfuncon, electrical shock, or fir e.
5. If connecng power to fixed wiring, a surge
protector and main power switch should be
installed.
6. If connecng power to fixed wiring, a switch
or circuit breaker that disconnects all poles and
has a contact separaon of at least 1/8in (3mm)
must be incorporated in the fixed wiring. The
qualified technician must use an approved
circuit breaker or switch.
7. Only connect the unit to an individual branch
circuit outlet. Do not connect another appliance
to that outlet.
8. Make sure to properly ground the air condioner.
9. Every wire must be firmly connected. Loose
wiring can cause the terminal to overheat,
resulng in product malfuncon and possible fire.
Do not let wires touch or rest against refrigerant
tubing, the compressor, or any moving parts
within the unit.
To avoid geng an electric shock, never touch
the electrical components soon aer the power
supply has been turned off. Aer turning off
the power, always wait 10 minutes or more
before you touch the electrical components.
10.
11.
WARNING
BEFORE PERFORMING ANY ELECTRICAL
OR WIRING WORK, TURN OFF THE
MAIN POWER TO THE SYSTEM.
Connect signal and power cables
The signal cable enables communicaon between
the indoor and outdoor units. You must first
choose the right cable size before preparing it for
connecon.
Cable Types
• Stranded Cable
• 16 AWG
NOTE: In North America, choose the cable type
according to the local electrical codes and
regulaons.
NOTE: In North America, please choose the
right cable size according to the Minimum
Circuit Ampacity indicated on the nameplate
of the unit.
Wiring Connection
STEP 9:
9.1 Choose the right cables size determined by the maximum operang current on the nameplate.
(Check the cables size refer to secon INSTALLATION PRECAUTIONS)
9.2 Open the front panel of indoor unit.
9.3 Use a screwdriver, open the electric control box cover, to reveal the terminal block.
9.4 Unscrew the cable clamp.
9.5 Insert one end of the cable into the posion
of control box from the back of the right end
of the indoor unit.
9.6 Connect the wires to corresponding terminal
according to the wiring diagram on the electric
well connected.
9.7 Screw the cable clamp to fasten the cables.
9.8 Reinstall the electric control box cover and
front panel.
Control box
Wiring diagram
Front panel
Wiring Connection

Wrap Piping and Cable
Connecng
wiring
Refrigerant
piping
Drainage hose
Insulaon tape
Aer the refrigerant pipes, connecng wires and drainage hose are all installed, in order to save
space, protect and insulate them, it must be bundle with insulang tape before passing them through
the wall hole.
Note: Make sure the drainage hose is at the boom.
A
(I)
(II) void crossing and bending of parts.
connecng wires and drainage hose
together ghtly.
10.1 Slowly pass the refrigerant pipes, connecng wires and drainage hose wrapped bundle through
the wall hole.
10.2 Hook the top of indoor unit on the mounng plate.
10.3 Apply slight pressure to the le and right sides of the indoor unit, make sure the indoor unit is
hooked firmly.
10.4 Push down the bottom of indoor unit to let the snaps onto the hooks of the mounng plate, and
make sure it is hooked firmly.
13
10.1 Arrange the pipes ,cables and drainage hose well as the following picture.
INSTALLATION MANUAL - Indoor Unit installation
STEP 10:
Mount Indoor Unit
30-50mm
Move to left or right
(1.18-1.96in)
30-50mm
(1.18-1.96in)
Keep in mind that the hooks on the mounng plate are
smaller than the holes on the back of the unit.
If you find that you don’t have ample room to connect
embedded pipes to the indoor unit, the unit can be
adjusted le or right by about 30-50mm (1.18-1.96in),
depending on the model.
If refrigerant piping is already embedded in the wall, do the following:
10.5
Hook the top of the indoor unit on the upper
hook of the mounng plate.
Use a bracket or wedge to prop up the unit,
giving you enough room to connect the
refrigerant piping, signal cable, and drain
hose.
Connect drain hose and refrigerant piping
(refer to Refrigerant Piping Connecon
secon of this manual for instrucons).
Keep pipe connecon point exposed to
perform the leak test (refer to Electrical
Checks and Leak Checks secon of this
manual).
Aer the leak test,
wrap the connecon
point with
insulaon tape.
Remove the bracket or wedge that is propping
up the unit.
Using even pressure, push down on the
boom half of the unit. Keep pushing down
unl the unit snaps onto the hooks along the
boom of the mounng plate.
10.6
10.7
10.8
10.9
10.10
10.11
Unit is adjustable

Installation Instructions – Outdoor unit
Step 1: Select installaon locaon
Before installing the outdoor unit, you must
choose an appropriate locaon. The following are
standards that will help you choose an appropriate
locaon for the unit.
Proper installaon locaons meet the
following standards:
 Meets all spaal requirements shown in
Installaon Space Requirements above.
 Good air circulaon and venlaon.
 Firm and solid—the locaon can support the
unit and will not vibrate.
 Noise from the unit will not disturb others
Install the unit by following local codes and
regulaons , there may be differ slightly
between different regions.
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 direcon 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
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.
Wind Baffle

Protected from prolonged periods of direct
sunlight or rain.
Over 200cm/79in.
Over 30cm/12in.
Over 50cm/20in.
Over 30cm/12in.
Over 50cm/20in.
INSTALLATION MANUAL - Outdoor Unit installation
14
Outdoor Unit Installation
STEP 11:
Wrap Piping and Cable
Aer the refrigerant pipes, connecng wires and drainage hose are all installed, in order to save
Near an obstacle that will block air inlets
and outlets

Where snowfall is ancipated, take
appropriate measures to prevent ice
buildup and coil damage.
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 combusble gas
In a locaon that is exposed to large
amounts of dust
In a locaon exposed to a excessive amounts
of salty air
DO NOT install unit in the following
locatrions:

Step 2: Install drain joint(Heat pump unit only)
Before bolng the outdoor unit in place, you must
install the drain joint at the boom of the unit.
Note that there are two different 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° unl 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 heang 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 heang 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 vercal as possible to ensure swi water
drainage. If water drains too slowly, it can
freeze in the hose and flood the unit.
The outdoor unit can be anchored to the
ground or to a wall-mounted bracket with
bolt(M10). Prepare the installaon base of the
unit according to the dimensions below.
Step 3: Anchor outdoor unit
UNIT MOUNTING DIMENSIONS
The following is a list of different outdoor
unit sizes and the distance between their
mounng feet. Prepare the installaon base
of the unit according to the dimensions below.
A
B
D
Air inlet
Air out let
Air inlet
W
H
INSTALLATION MANUAL - Outdoor Unit installation
15

If you will install the unit on a wall-mounted
bracket , do the following:
1.Mark the posion of bracket holes based on
dimensions chart.
2. Pre-drill the holes for the expansion bolts.
3. Place a washer and nut on the end of each
expansion bolt.
4. Thread expansion bolts through holes in
mounng brackets, put mounng brackets
in posion, and hammer expansion bolts into
the wall.
5. Check that the mounng brackets are level.
6. Carefully li unit and place its mounng feet
on brackets.
7. Bolt the unit firmly to the brackets.
8. If allowed, install the unit with rubber
gaskets to reduce vibraons and noise.
If you will install the unit on the ground or
on a concrete mounng plaorm, do the
following:
11.1 Mark the posions for four expansion bolts
based on dimensions chart.
11.2 Pre-drill holes for expansion bolts.
11.3 Place a nut on the end of each expansion bolt.
11.4 Hammer expansion bolts into the pre-drilled
holes.
11.5 Remove the nuts from expansion bolts, if
applicable install 4 rubber pads on the hole
before placing the outdooor unit. and
place outdoor unit on bolts.
11.6 Put washer on each expansion bolt, then
replace the nuts.
11.7 Using a wrench, ghten each nut unl snug.
WARNING
WHEN DRILLING INTO CONCRETE, EYE
PROTECTION IS RECOMMENDED AT ALL
TIMES.
CAUTION
Make sure that the wall is made of solid brick,
concrete, or of similarly strong material. The
wall must be able to support at least four
mes the weight of the unit.
INSTALLATION MANUAL - Outdoor Unit installation
16
Install 4 rubber pads (Oponal)
Outdoor Unit Dimensions (in) Mounting Dimensions
W x D x H Distance A (in) Distance B (in)
KOIU09H1-1T 728 x 305 x 550 (28.7" x 12.0" x 21.7") 434 (17.1") 278 (19.9")
KOIU12H1-1T 728 x 305 x 550 (28.7" x 12.0" x 21.7") 434 (17.1") 278 (19.9")
KOIU09H2-1T 728 x 305 x 550 (28.7" x 12.0" x 21.7") 434 (17.1") 278 (19.9")
KOIU12H2-1T 728 x 305 x 550 (28.7" x 12.0" x 21.7") 434 (17.1") 278 (19.9")
KOIU18H2-1T 845 × 380 × 699 (33.3" x 15.0" x 27.5") 586 (23.1") 347 (13.7")
KOIU24H2-1T 910 x 397 x 805 (35.8" x 15.6" x 31.7") 607 (23.9") 390 (15.4")
KOIU36H2-1T 910 x 360 x 800 (35.8" x 14.2" x 31.5") 607 (23.9") 421 (16.6")
Model Number
W
H
D

17
Note on Pipe Length
The length of refrigerant piping will affect the performance and energy efficiency of the unit. Nominal
efficiency is tested on units with a pipe length of 5 meters (16.5)(
In North America, the standard pipe
length is 7.5m (25’) . A minimum pipe run of 3 metres is required to minimise vibraon & excessive noise.
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 operaon and minimize the
need for future maintenance.
1. Measure the distance between the indoor
and outdoor units.
When connecng refrigerant piping, do not let substances or gases other than the specified
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 refrigeraon cycle. This can cause explosion and
injury.
2. Using a pipe cuer, cut the pipe a lile longer
than the measured distance.
3. Make sure that the pipe is cut at a perfect 90°
angle.
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 efficiency
of the unit.
Refrigerant Piping Connection
INSTALLATION MANUAL - Outdoor Unit installation
Refer to page 5 for maximum length and drop height of refrigerant piping per unit model
It is highly recomended to use factory pre-made Maxwell brand installaon kits for easy and quick installaon
Recomended Installation Kit sizes
Model Number Liquid Line Gas Line Installation Kit 16' Installation Kit 25' Other Available
Length
KOIU09H1-1 / KIWU09H1-1T 1/4" 3/8" IKM1438F16-C17 IKM1438F25-C26 32' / 50'
KOIU12H1-1 / KIWU12H1-1T 1/4" 3/8" IKM1438F16-C17 IKM1438F25-C26 32' / 50'
KOIU09H2-1 / KIWU09H2-1T 1/4" 3/8" IKM1438F16-C17 IKM1438F25-C26 32' / 50'
KOIU12H2-1 / KIWU12H2-1T 1/4" 3/8" IKM1438F16-C17 IKM1438F25-C26 32' / 50'
KOIU18H2-1 / KIWU18H2-1T 1/4" 3/8" IKM1438F16-C17 IKM1438F25-C26 32' / 50'
KOIU24H2-1 / KIWU24H2-1T 1/4" 1/2" IKM1412F16-C17 IKM1412F25-C26 32' / 50'
KOIU36H2-1 / KIWU36H2-1T 1/4" 5/8" IKM1458F16-C17 IKM1458F16-C17 32' / 50'

18
6.
Place flaring tool onto the form.
7. Turn the handle of the flaring tool clockwise
unl the pipe is fully flared.
8.
Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and
even flaring.
Step 4: Connect pipes
When connecng refrigerant pipes, be careful
not to use excessive tor que or to deform the
piping in any way. You should first connect the
low-pressure pipe, then the high-pressure pipe.
MINIMUM BEND RADIUS
When bending connecve refrigerant piping,
the minimum bending radius is 10cm.
≥10cm (4in)
Radius
Instructions for Connecting Piping to
Indoor Unit
1.
Align the center of the two pipes that you will
connect.
Indoor unit tubing Flare nut Pipe
Max.
Step 2: Remove burrs
Burrs can affect the air-ght seal of refrigerant
piping connecon. 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 secon of the pipe.
Pipe
Reamer
Point down
Step 3: Flare pipe ends
Proper flaring is essenal to achieve an airght
seal.
1.
Aer removing burrs from cut pipe, seal
the ends with PVC tape to prevent foreign
materials from entering the pipe.
2.
Sheath the pipe with insulang material.
3.
Place flare nuts on both ends of pipe. Make
sure they are facing in the right direcon,
because you can’ t put them on or change
their direcon aer flaring.
Flare nut
Copper pipe
4.
Remove PVC tape fr om ends of pipe when
ready to perform flaring work.
5.
Clamp flare form on the end of the pipe.
The end of the pipe must extend beyond the
edge of the flare form in accordance with the
dimensions shown in the table below.
PIPING EXTENSION BEYOND FLARE FORM
Outer Diameter of
Pipe (mm/in)
A (mm)
Min. Max.
Ø 6.35 (1/4”) 0.7 (0.0275”) 1.3 (0.05”)
Ø 9.52 (3/8”) 1.0 (0.04”) 1.6 (0.063”)
Ø12.7 ( 1/2”) 1.0 (0.04”) 1.8 (0.07”)
Ø 16 (5/8”)
Ø 19 (3/4”)
2.0 (0.078”) 2.2 (0.086”)
2.0 (0.078”) 2.4 (0.094”)
Flare form
Pipe
A
INSTALLATION MANUAL - Outdoor Unit installation

2.
Tighten the flare nut as ghtly as possible by
hand.
3.
Using a spanner, grip the nut on the unit
tubing.
4. While firmly gripping the nut on the unit
tubing, use a torque wrench to ghten the
flare nut according to the torque values in the
Torque Requirements table below. Loosen
the flaring nut slightly, then ghten again.
Instructions for Connecting Piping to Outdoor Unit
USE SPANNER TO GRIP MAIN
BODY OF VALVE
Torque from ghtening the flare nut can snap
off other parts of valve.
TORQUE REQUIREMENTS
1.
Unscrew the cover from the packed valve on
the side of the outdoor unit.
2. Remove protecve caps from ends of valves.
3. Align flared pipe end with each valve, and
ghten the flare nut as ghtly as possible by
hand.
4. Using a spanner, grip the body of the valve.
Do not grip the nut that seals the service
valve.
5.
While firmly gripping the body of the valve,
use a torque wrench to ghten the flare nut
according to the correct torque values.
6. Loosen the flaring nut slightly, then ghten
again.
7. Repeat Steps 3 to 6 for the remaining pipe.
DO NOT USE EXCESSIVE TORQUE
Excessive force can break the nut or damage the refrigerant piping. You must not exceed
torque requirements shown in the table above.
Valve cover
INSTALLATION MANUAL - Outdoor Unit installation
PIPE Size
1/4 ( 6.35)
3/8 ( 9.52)
1/2 ( 12)
5/8 ( 15.88)
Newton meter[N x m]
18 - 20
30 - 35
45 - 50
60 - 65
Pound-force foot (Ibf-) Kilogram-force meter (kgf-m)
24.4 - 27.1
40.6 - 47.4
61.0 - 67.7
81.3 - 88.1
2.4 - 2.7
4.1 - 4.8
6.2 - 6.9
8.2 - 8.9
19

Preparations and Precautions
Air and foreign maer in the refrigerant circuit can
cause abnormal rises in pressure, which can damage
the air condioner, reduce its efficiency, and cause
injury. Use a vacuum pump and manifold gauge to
evacuate the refrigerant circuit, removing any
non-condensable gas and moisture from the system.
Evacuaon should be performed upon inial
installaon and when unit is relocated.
BEFORE PERFORMING EVACUATION

Check to make sure the connecve pipes
between the indoor and outdoor units
are connected properly .

Check to make sure all wiring is connected
properly.
Evacuation Instructions
1.
Connect the charge hose of the manifold
gauge to service port on the outdoor unit’s
low pressure valve.
Connect another charge hose from the
manifold gauge to the vacuum pump.
Open the Low Pressure side of the manifold
gauge. Keep the High Pressure side closed.
Turn on the vacuum pump to evacuate the
system.
Run the vacuum for at least 15 minutes, or
unl the Compound Meter reads -76cmHG
(-10 Pa). (-14.5 psi)
2.
3.
4.
5.
5
8.
If there is a change in system pressure, refer
to Gas Leak Check secon for informaon
on how to check for leaks. If there is no
change in system pressure, unscrew the cap
from the packed valve (high pressure valve).
9.
Insert hexagonal wrench into the packed valve
(high pressure valve)and ope n the valve by
turning the wrench in a 1/4 counterclockwise
turn. Listen for gas to exit the system, then
close the valve aer 5 seconds.
10.
Watch the Pressure Gauge for one minute
to make sure that there is no change in
pressure. The Pr essure Gauge should read
slightly higher than atmospheric pressure.
Flare nut
Cap
valve body valve stem
11.
Remove the charge hose from the service port .
12.
Using hexagonal wrench, fully open both the
high pressure and low pressure valves.
13.
Tighten valve caps on all three valves (service
port, high pressure, low pressure) by hand.
You may ghten it further using a torque
wrench if needed.
OPEN VALVE STEMS GENTLY
When opening valve stems, turn the hexagonal
wrench unl it hits against the stopper. Do not
try to force the valve to open further.
INSTALLATION MANUAL - Air Evacuation
20
MANIFOLD AND GAUGES
MC MC