Midea MEU-18MPH2 User manual

MIDDLE STATIC PRESSURE DUCT TYPE AIR CONDITIONER
Installation Manual
Middle Static Pressure Duct Type
IMPORTANT NOTE:
Read this manual carefully before
installing or operating your new air
conditioning unit. Make sure to save
this manual for future reference.
MEU-18MPH2
MEU-24MPH2
MEU-36MPT2
MEU-48MPT2

Accessories....................................................04
a. Indoor Unit Parts
........................................ 07
b. Indoor Unit Installation Instructions
.......08
Safety Precautions .....................................05
Outdoor Unit Installation......................... 12
a. Outdoor Unit Installation Instructions
......12
b. Outdoor Unit Types and Specifications....13
c. Notes on Drilling Hole in Wall
....................14
Drainpipe Installation............................... 15
Table of Contents
Installation Manual
Indoor Unit Installation ...........................07
Installation Overview ...............................06
1
2
5
3
4
6

Page 3 
Refrigerant Piping Connection.......................17
A. Notes on Pipe Length and Elevation..............17
B. Refrigerant Piping Connection Instructions
...18
Wiring................................................. 20
a. Outdoor Unit Wiring.................. 20
b. Indoor Unit Wiring
..................... 21
c. Power Specifications
................... 23
Air Evacuation..................................................25
a. Evacuation Instructions
................................ 25
b. Note on Adding Refrigerant
....................... 26
Test Run.............................................27
MC MC
7
8
9
10
LN

Page 4 
Accessories 1
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 equipment failure.
Connecting wire for display (2m)
Cord protection rubber ring
QUANTITY
SHAPE
NAME
Soundproof / insulation sheath 2
1
1
1
Tubing & Fittings
Others
Installation manual
Transfer connector(Φ12.7-Φ15.9)/
( )(Packed with the indoor unit )
NOTE: Pipe size may differ from appliance to
appliance. To meet different pipe size requirements,
sometimes the pipe connections need a transfer
connector installed on the outdoor unit .
Transfer connector(Φ6.35-Φ9.52)/
( )(Packed with the indoor unit)
NOTE: Pipe size may differ from appliance to
appliance. To meet different pipe size requirements,
sometimes the pipe connections need a transfer
connector installed on the outdoor unit .
Transfer connector(Φ9.52-Φ12.7)/
( ) (Packed with the indoor unit,
used for multi-type models only )
NOTE: Pipe size may differ from appliance to
appliance. To meet different pipe size requirements,
sometimes the pipe connections need a transfer
connector installed on the outdoor unit .
1
Owner‘s manual
Drain joint (some models)
Seal ring (some models)
Drainpipe Fittings
(for cooling & heating)
Seal sponge (some models)
EMC Magnetic Ring
(some models)
Magnetic ring
(wrap the electric wires S1 & S2 ( P & Q & E )
around the magnetic ring twice)
Magnetic ring
(Hitch on the connective cable between the indoor
unit and outdoor unit after installation.)
1
1
Orifice (some models) 1
Φ0.5in-Φ0.63in
Φ0.25in-Φ0.375in
Φ0.375in-Φ0.5in
1
(on some models)
1
(on some models)
1
(on some models)
1(on some models)
1(on some models)
1
Optional accessories
There are two types of remote controls: wired and wireless.
Select a remote controller based on customer preferences and requirements and install in an
appropriate place.
Refer to catalogues and technical literature for guidance on selecting a suitable remote controller.
•
S1&S2(P&Q&E)

Page 5 
Safety Precautions 2
Read Safety Precautions Before Installation
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.
WARNING
• Carefully read the Safety Precautions before installation.
• In certain functional environments, such as kitchens, server rooms, etc., the use of specially
designed air-conditioning units is highly recommended.
• Only trained and certified technicians should install, repair and service this air
conditioning unit.
Improper installation may result in electrical shock, short circuit, leaks, fire or other damage to
the equipment and personal property.
• Strictly follow the installation instructions set forth in this manual.
Improper installation may result in electrical shock, short circuit, leaks, fire or other damage to
the equipment.
• Before you install the unit, consider strong winds, typhoons and earthquakes that might affect
your unit and locate it accordingly. Failure to do so could cause the equipment to fail.
• After installation, ensure there are no refrigerant leaks and that the unit is operating properly.
Refrigerant is both toxic and flammable and poses a serious health and safety risk.
Note about Fluorinated Gasses
1. This air-conditioning unit contains fluorinated gasses. For specific information on the type of gas
and the amount, please refer to the relevant label on the unit itself.
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. If the system has a leak-detection system installed, it must be checked for leaks at least every 12
months.
5.
When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.
Failure to observe a caution may result in injury or equipment damage.
WARNING
CAUTION
Failure to observe a warning may result in death. The product must be installed by
installers or contractors who are licenced HVAC professionals and in compliance
with all local and state and provincial laws.

Page 6 
Installation Overview 3
Unit Installation
Overview
LN
123
4
5
MC MC
6
7
Install the indoor unit
(Page 7)
INSTALLATION ORDER
Install the outdoor unit
(Page 13)
Install the drainpipe
(Page 15)
Evacuate the refrigeration system
(Page 25)
Connect the wires
(Page 20)
Connect the refrigerant pipes
(Page 17)
Perform a test run
(Page 27)

Page 7 
Indoor Unit Installation 4
Indoor Unit
Installation
Indoor Unit Parts
Fig. 4.1
WARNING
• Securely install the indoor unit on a structure
that can sustain its weight. If the structure is
too weak, the unit may fall causing personal
injury, unit and property damage, or even
death
• DO NOT install the indoor unit in a bathroom
or laundry room as excessive moisture can
short the unit and corrode the wiring.
CAUTION
• Install the indoor and outdoor units, cables
and wires at least 1m (3.2’) from televisions
or radios to prevent static or image
distortion. Depending on the appliances, a
1m (3.2’) distance may not be sufficient.
• If the indoor unit is installed on a metal
part of the building, it must be grounded.
Indoor Unit Installation Instructions
Step 1: Select installation location
The indoor unit should be installed in a location
that meets the following requirements:

Enough room for installation and maintenance.
Enough room for the connecting 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 impeded.
The airflow can fill the entire room.
There is no direct radiation from heaters.
CAUTION
DO NOT install the unit in the following
locations:
Where oil drilling or fracking is taking place.
Coastal areas with high salt content in the air
Near geothermal activity and corrosive gas
Buildings that may experience power
fluctuations
Enclosed spaces
Areas with strong electromagnetic waves
Areas that store flammable materials or gas
Rooms with high humidity, such as
bathrooms or laundry rooms
Fig. 4.2
Air outlet
Air inlet
Air filter(on selected models)
Drain hose
Electric control cabinet
Refrigerant connecting pipe
checking orifice
60cmX60cm (23.6inX23.6in)
30cm (11.8inch) or more
20cm (7.9inch) or more
Maintenance Clearance
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Safety Precautions

Page 8 
Indoor Unit
Installation
Fig. 4.3
Step 2: Hang indoor unit.
1.
Please refer to the following diagrams to locate the four positioning screw bolt holes on the
ceiling. Be sure to mark the paces where you will drill ceiling hook holes.
Air outlet dimensions
Air inlet dimensions
Air filter
Descending ventilation opening and mounted hook
Air filter
Electric control box
Table.4-1 (unit: mm/inch)
MODEL
(Btu/h)
Outline dimension
ABC
18K 210/8.3 674/26.5880/34.6
24K 249/9.8 774/30.51100/43.3
30K~36K 249/9.8 774/30.51360/53.5
36K~60K 300/11.8 874/34.41200/47.2
air outlet opening size
DEF
136/5.4 706/27.8600/23.6
175/6.9 926/36.5700/27.6
175/6.9 1186/46.7700/27.6
227/8.9 1044/41.1800/31.5
air return opening size
190/7.5
228/8.9
228/8.9
280/11
Size of mounted lug
I
920/36.2782/30.8
1140/44.91001/39.4
1400/55.11261/49.6
1240/48.81101/43.3
J
G
H
508/20
598/23.5
598/23.5
697/27.4

Page 9 
Indoor Unit
Installation
Cut off the roof beam.
Strengthen the point at which the cut
was made. Consolidate the roof beam.
Fig. 4.6
Fig. 4.7
Original concrete bricks
Use an embedding screw bolt, crock, and stick
harness.(See Fig.4.6)
Steel Roof beam structure
Install and use the supporting steel angle.
(See Fig.4.7)
Fig. 4.4
Wood
Place the wood mounting across the roof beam,
then install the hanging screw bolts.(See Fig.4.4)
Wood mounting
Roof beam
Hanging screw bolts
Ceiling
Fig. 4.5
New concrete bricks
Inlay or embed the screw bolts. (See Fig. 4.5)
(Blade shape insertion) (Slide insertion)
Steel bar
Embedding screw bolt
(Pipe hanging and embedding screw bolt)
Hanging screw bolt
Hanging
bolts
Supporting
steel angle
Fig. 4.9
Screw nut
Washer
Hanging screw bolt
Overhang part
Shockproof cushion
NOTE: Confirm the minimum drain tilt is 1/100
or more.
CAUTION
The unit body must be completely aligned with
the hole. Ensure that the unit and the hole are
the same size before moving on.
2.
Install and fit pipes and wires after you have
finished installing the main body.When
choosing where to start, determine the
direction of the pipes to be drawn out.
Especially in cases where there is a ceiling
involved, align the refrigerant pipes, drain
pipes, and indoor and outdoor lines with their
connection points before mounting the unit.
3.
Install hanging screw bolts.
4.
After you select an installation location,align
the refrigerant pipes, drain pipes, as well as
indoor and outdoor wires with their
connection points before mounting the unit.
5.
Drill 4 holes 10cm (4”) deep at the ceiling
hook positions in the internal ceiling. Be sure
to hold the drill at a 90° angle to the ceiling.
6.
Secure the bolt using the washers and nuts
provided.
7.
Install the four suspension bolts.
8.
Mount the indoor unit with at least two
people to lift and secure it. Insert suspension
bolts into the unit’s hanging holes. Fasten
them using the washers and nuts provided.
(See Fig. 4.8).
9. Mount the indoor unit onto the hanging
screw bolts with a block. Position the
indoor unit flat using a level indicator to
prevent leaks. (See Fig. 4.9).
Fig. 4.8

Page 10 
Indoor Unit
Installation
Fig. 4.10
Step 3: Duct and accessories installation
NOTE: 1. Do not place the connecting duct
weight on the indoor unit.
2. When connecting the duct, use an
nonflammable canvas tie-in to prevent
vibrating.
3. Insulation foam must be wrapped outside the
duct to avoid condensate. An internal duct
underlayer can be added to reduce noise,
if the end-user requires.
1. Install the filter (optional) according to the size
of the air inlet.
5. Refer to the following static pressure guidelines
when installing the indoor unit.
Change the fan motor static pressure
according to external duct static pressure.
2. Install the canvas tie-in between the body and
the duct.
3. The air inlet and air outlet duct should be far
enough apart enough to a avoid air passage
short-circuit.
4. Connect the duct according to the following
diagram:
Canvas tie-in Canvas tie-in
Air outlet
Isolation booth
Isolation booth
checking orifice
Air inlet
Air dust filter
Table.4-2
MODEL
(Btu/h)
Static Pressure
(Pa / inAq)
0~100 (0-0.40)
18K
0~160 (0-0.64)
24K
30K~36K
42K~60K
0~160 (0-0.64)
0~160 (0-0.64)

Page 11 
Indoor Unit
Installation
Step 4: Adjust the air inlet direction
(from rear side to under-side).
1. Take off the ventilation panel and flange.
2. Change the mounting positions of the
ventilation panel and air return flange.
Air return flange
Ventilation panel
3. When installing the filter mesh, fit it into the
flange as illustrated in the following figure.
NOTE: All the figures in this manual are for
demonstration purposes only. The air conditioner
you have purchased may be slightly different in
design, though similar in shape.
Step 5: Fresh air duct installation
Dimension : Duct joint for fresh air
Ø125mm(4.92”) Ø160mm(6.3”)
MODLE
18-60
Step 6: Motor and drain pump maintenance
Motor maintain:
Take off the ventilated panel.
Take off the blower housing.
Take off the motor.
1.
2.
3.
(the rear ventilated panel is used as an example)
Mofor
Blower housing
Ventilated panel
Pump maintainance:
Remove four screws from the drain pump.
Unplug the pump power supply and water
level switch cable.
Detach the pump.
1.
2.
3.
Pump
Fig. 4.11
Fig. 4.12
Fig. 4.13
Fig. 4.14
Fig. 4.15
Fig. 4.16
Air return flange
Ventilation panel

Outdoor Unit Installation
Outdoor Unit Installation Instructions
Step 1: Select installation location.
The outdoor unit should be installed in the
location that meets the following requirements:
Place the outdoor unit as close to the indoor
unit as possible.
Ensure that there is enough room for
installation and maintenance.
The air inlet and outlet must not be
obstructed or exposed to strong wind.
Ensure the location of the unit will not be
subject to snowdrifts, accumulation of leaves
or other seasonal debris. If possible, provide
an awning for the unit. Ensure the awning
does not obstruct airflow.

The installation area must be dry and well
ventilated.
There must be enough room to install the
connecting pipes and cables and to access
them for maintenance.
The area must be free of combustible gases
and chemicals.
The pipe length between the outdoor and
indoor unit may not exceed the maximum
allowable pipe length.
If possible, DO NOT install the unit where it
is exposed to direct sunlight.
If possible, make sure the unit is located far
away from your neighbors’ property so that
the noise from the unit will not disturb them.
If the location is exposed to strong winds (for
example: near a seaside), the unit must be
placed against the wall to shelter it from the
wind. If necessary, use an awning.
(See Fig. 5.1 & 5.2)
Install the indoor and outdoor units, cables
and wires at least 1 meter from televisions or
radios to prevent static or image distortion.
Depending on the radio waves, a 1 meter
distance may not be enough to eliminate all
interference.
Strong wind
Strong wind
Strong wind
Fig. 5.1 Fig. 5.2
Step 2: Install outdoor unit.
Fix the outdoor unit with anchor bolts (M10)
>60cm / 23.6”
Fix with bolts
CAUTION
• Be sure to remove any obstacles that
may block air circulation.
• Make sure you refer to Length
Specifications to ensure there is
enough room for installation and
maintenance.
Fig. 5.3
Page 12 
Outdoor Unit Installation
5
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Page 13 
Outdoor Unit
Installation
>120cm / 47”
Air Outlet
(Wall or obstacle)
H
D
W
>30cm / 11.8”
Air inlet
Air inlet Air inlet
Air inlet
(Wall or obstacle)
>30cm / 11.8”
>30cm / 11.8”
>30cm / 11.8”
Table 5.1: Length Specifications of Split
Type Outdoor Unit (unit: mm/inch)
Table 5.2: Length Specifications of Vertical
Discharge Outdoor Unit (unit: mm/inch)
MODEL
DIMENSIONS
WH D
18 633/25 554/21.8554/21.8
24 633/25 554/21.8554/21.8
36 759/29.8 554/21.8554/21.8
36 633/25 600/23.6600/23.6
48 759/29.8 710/28710/28
60 843/33 710/28710/28
Split Type Outdoor Unit
(Refer to Fig 5.4, 5.5, 5.6, 5.10 and Table 5.1)
Vertical Discharge Type Outdoor Unit
(Refer to Fig 5.7, 5.8, 5.9 and Table 5.2)
Fig. 5.7
Fig. 5.8
Fig. 5.9
Fig. 5.6
Fig. 5.5
A
B
D
W
H
W
H
Fig. 5.4
Outdoor Unit Dimensions
W x H x D
Mounting Dimensions
Distance A Distance B
760x590x285 (29.9x23.2x11.2) 530 (20.85) 290 (11.4)
810x558x310 (31.9x22x12.2) 549 (21.6) 325 (12.8)
845x700x320 (33.27x27.5x12.6) 560 (22) 335 (13.2)
900x860x315 (35.4x33.85x12.4) 590 (23.2) 333 (13.1)
945x810x395 (37.2x31.9x15.55) 640 (25.2) 405 (15.95)
990x965x345 (38.98x38x13.58) 624 (24.58) 366 (14.4)
946x810x420 (37.24x31.9x16.53) 673 (26.5) 403 (15.87)
946x810x410 (37.24x31.9x16.14) 673 (26.5) 403 (15.87)
952x1333x410 (37.5x52.5x16.14) 634 (24.96) 404 (15.9)
952x1333x415 (37.5x52.5x16.34) 634 (24.96) 404 (15.9)
845x702x363 (33.27x27.6x14.3) 540 (21.26) 350 (13.8)
938x1369x392 (36.93x53.9x15.43) 634 (24.96) 404 (15.9)
900x1170x350 (35.4x46x13.8) 590 (23.2) 378 (14.88)
800x554x333 (31.5x21.8x13.1) 514 (20.24) 340 (13.39)

NOTE: The minimum distance between the
outdoor unit and walls described in the
installation guide does not apply to airtight
rooms. Be sure to keep the unit unobstructed
in at least two of the three directions (M, N, P)
(See Fig. 5.10)
M
N
P
30 cm / 11.8” from back wall
60 cm / 23.6” on right
60 cm / 23.6” above
30 cm / 11.8” on left
200 cm / 78” in front
Fig. 5.10
Drain Joint Installation
Before bolting the outdoor unit in place, you
must install the drain joint at the bottom of the
unit. (See Fig. 5.12)
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.
NOTE: Make sure the water drains to a safe
location where it will not cause water damage
or a slipping hazard.
Seal
Drain joint
(A) (B)
Base pan hole of
outdoor unit
Seal
Fig. 5.12
Notes On Drilling Hole In Wall
You must drill a hole in the wall for the
refrigerant piping, and the signal cable that will
connect the indoor and outdoor units.
1. Determine the location of the wall hole
based on the location of the outdoor unit.
2.
Using a 65-mm (2.5”) core drill, drill a hole
in the wall.
NOTE: When drilling the wall hole, make
sure to avoid wires, plumbing, and other
sensitive components.
3.
Place the protective wall cuff in the hole.
This protects the edges of the hole and will
help seal it when you finish the installation
process.
Page 14 
Outdoor Unit Installation
Fig. 5.11
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
LA
25 cm / 9.8” or more
1/2H < L ≤H
30 cm / 11.8” or more
L >H Can not be installed
Table 5.3 The relations between H, A and L
are as follows.

Fig. 6.3
(39-59”)
(7.9”)
<20cm
(21.7”)
<55cm
Lean over 1/50
1-1.5m
Drainpipe installation for units with a pump
Ceiling
0 - 75mm
(3”)
NOTE ON DRAINPIPE INSTALLATION
• When using an extended drainpipe, tighten
the indoor connection with an additional
protection tube. This prevents it from
pulling loose.
• The drainpipe should slope downward at a
gradient of at least 1/100 to prevent water
from flowing back into the air conditioner.
• To prevent the pipe from sagging, space
hanging wires every 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
55cm (21.7”) from the ceiling board. the
distance between the unit and the lift pipe
must be less than 20cm (7.9”). Incorrect
installation could cause water to flow back
into the unit and flood.
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 local
hardware store or dealer.
Indoor Drainpipe Installation
Install the drainpipe as illustrated in Figure 6.2.
1.
2.
Drainpipe
connecting port
Drain hose
Pipe clasp Insulation
Fig. 6.1
Drainpipe Installation
Fig. 6.2
Page 15 
6
Drainpipe
Installation
Cover the drainpipe with heat insulation to
prevent condensation and leakage.
Attach the mouth of the drain hose to the
unit’s outlet pipe. Sheath the mouth of the
hose and clip it firmly with a pipe clasp.
(See Fig 6.1)
NOTE: When connecting multiple drainpipes,
install the pipes as illustrated in Fig 6.4.
(39-59”)
1-1.5m
Lean over 1/50
Ceiling
• To prevent air bubbles, keep the drain hose
level or slightly tiled up (<75mm / 3”).
0-53cm
(20.8”)
≥10cm
(4”)
Fig. 6.4

Drainage test
Check that the drainpipe is unhindered.
This test should be performed on newly built
houses before the ceiling is paved.
Units with a pump.
Units without a pump.
1. Remove the test cover.
Fill the water pan with 2 liters of water.
2. Turn on the unit in COOLING mode. You will
hear the drain pump.Check whether the
water is discharged properly (a 1-minute lag
is possible, depending on the length of the
drain pipe), Check whether water leaks from
the joints.
3. Turn off the air conditioner and put the cap
back on.
3.
Using a 65-mm (2.5”) 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 (0.5”). This will ensure proper
water drainage (See Fig. 6.5). Place the
protective wall cuff in the hole. This protects
the edges of the hole and will help seal it
once you finish installation.
Wall
IndoorOutdoor
≈ 12mm / 0.5 inch
Fig. 6.5
NOTE: When drilling the hole, make sure to
avoid wires, plumbing, and other sensitive
components.
4.
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.
Page 16 
Drainpipe Installation
Test cap
Fig.6.7
Fig.6.8
C
L
O
S
E
D
O
P
E
N
C
L
O
S
E
D
O
P
E
N
Stow tube
Fig.6.6
Stow tube
Fill the water pan with 2 liters of water.
Check that the drainpipe is unhindered.

Refrigerant Piping Connection
Safety Precautions
WARNING
• All field piping must be completed by a
licensed technician and must comply with
the local and national regulations.
• When the air conditioner is installed in a
small room, measures must be taken to
prevent the refrigerant concentration in
the room from exceeding the safety limit
in the event of refrigerant leakage. If the
refrigerant leaks and its concentration
exceeds its proper limit, hazards due to
lack of oxygen may result.
• When installing the refrigeration system,
ensure that air, dust, moisture or foreign
substances do not enter the refrigerant
circuit. Contamination in the system may
cause poor operating capacity, high
pressure in the refrigeration cycle,
explosion or injury.
• Ventilate the area immediately if there is
refrigerant leakage during the installation.
Leaked refrigerant gas is both toxic and
flammable. Ensure there is no refrigerant
leakage after completing the installation
work.
Notes On Pipe Length and Elevation
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 Table 7.1:
Table 7.1: The Maximum Length And Drop
Height Based on Models. (Unit: m/ft.)
Type of model Capacity
(Btu/h)
Length of
piping
Maximum drop
height
North America,
Australia and the
eu frequency
conversion Split
Typ e
<15K 25/82 10/32.8
15K - <24K 30/98.4 20/65.6
24K - <36K 50/164 25/82
36K - 60K 65/213 30/98.4
Other Split Type
12K 15/49 8/26
18K-24K 25/82 15/49
30K-36K 30/98.4 20/65.6
42K-60K 50/164 30/98.4
Refrigerant Piping with Twin Indoor Units
When installing multiple indoor units with a single outdoor unit, ensure that the length of the
refrigerant pipe and the drop height between the indoor and outdoor units meet the requirements
illustrated in the following diagram:
LL1
L2
H2
The line branch pipe
Indoor unit
Outdoor unit
H1
Indoor unit
The drop height
between two
indoor units
must be less
than or equal to
50cm (19.6”)
The drop height
between indoor
unit
and outdoor unit
must be less than
or equal to 20m
(65.6’)
Fig. 7.1
Page 17 
7
Refrigerant Piping Connection

Table 7.2
Permitted length
Piping
length
Total piping length 18K+18K 30m/98’ L+Max
(L1, L2)
24K+24K
30K+30K
50m/164’
(farthest distance from
the line pipe branch)
15m/49’ L1, L2
(farthest distance from
the line pipe branch)
10m/32.8’ L1-L2
Drop
height
Drop height between
indoor and outdoor unit
20m/65.6’ H1
Drop height between
two indoor units
0.5m/1.6’ H2
Refrigerant Piping Connection Instructions
CAUTION
• The branching pipe must be installed
horizontally. An angle of more than 10° may
cause malfunction.
• DO NOTinstall the connecting pipe until both
indoor and outdoor units have been installed.
• Insulate both the gas and liquid piping to
prevent water leakage.
Step1: 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.
CAUTION
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.
1. Make sure that the pipe is cut at a perfect
90° angle. Refer to Fig. 7.2 for examples
of bad cuts
Oblique
Rough
Warped
90°
Fig. 7.2
Step2: Remove burrs.
Burrs can affect 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 dow n
Fig. 7.3
Step 3: Flare pipe ends
Proper flaring 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 flare 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. See Fig. 7.4
Flare nut
Copper pipe
Fig. 7.4
4.
Remove PVC tape from ends of pipe when
ready to perform flaring work.
Page 18 
Refrigerant Piping Connection
Size of joint pipes for indoor unit
Gas side
Capacity
of indoor
unit (A)
Size of main pipe(mm)
Liquid side
Φ12.7(0.5”)
Φ15.9(0.626”)
Φ15.9(0.626”)
Φ6.35(0.25”)
Φ9.5(0.375”)
Φ9.5(0.375”)
18K
24K
30K
Size of joint pipes for 410A indoor unit
Table 7.3
CE-FQZHN-01C
CE-FQZHN-01C
CE-FQZHN-01C
Available
branching pipe
Size of joint pipes for outdoor unit
Base on the following tables, select the diameters
of the outdoor unit connective pipes. In case of
the main accessory pipe large than the main pipe,
take the large one for the selection.
Model Gas side Liquid side
Φ15.9(0.626”)
Φ15.9(0.626”)
Φ15.9(0.626”)
Φ9.5(0.375”)
Φ9.5(0.375”)
Φ9.5(0.375”)
the size of main pipe(mm)
36K
48K
60K
Size of joint pipes for 410A outdoor unit
Table 7.4
The 1st branching pipe
CE-FQZHN-01C
CE-FQZHN-01C
CE-FQZHN-01C

5. Clamp flare form on the end of the pipe.
The end of the pipe must extend beyond
the flare form.
Flare form
Pipe
Fig. 7.5
6.
Place flaring tool onto the form.
7.
Turn the handle of the flaring tool clockwise
until the pipe is fully flared. Flare the pipe in
accordance with the dimensions shown in
table 7.5.
Table 7.5: PIPING EXTENSION BEYOND FLARE FORM
Pipe
gauge
Tightening
torque
Flare dimension (A)
(Unit: mm/Inch)
Flare shape
Min. Max.
Ø 6.4 14.2-17.2 N.m
(144-176 kgf.cm) 8.3/0.3 8.3/0.3
R0.4~0. 8
45 °±2
90 °
±4
A
Fig. 7.6
Ø 9.5 32.7-39.9 N.m
(333-407 kgf.cm) 12.4/0.48 12.4/0.48
Ø 12.7 49.5-60.3 N.m
(504-616 kgf.cm) 15.4/0.6 15.8/0.6
Ø 15.9 61.8-75.4 N.m
(630-770 kgf.cm) 18.6/0.7 19/0.74
Ø 19.1
97.2-118.6 N.m
(990-1210 kgf.cm) 22.9/0.9 23.3/0.91
8.
Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and
even flaring.
Step 4: Connect pipes
Connect the copper pipes to the indoor unit first,
then connect it to the outdoor unit. You should
first connect the low-pressure pipe, then the high-
pressure pipe.
1.
When connecting the flare nuts, apply a thin coat
of refrigeration oil to the flared ends of the pipes.
2.
Align the center of the two pipes that you
will connect.
Indoor unit tubing Flare nut Pipe
Fig. 7.7
3.
Tighten the flare nut as tightly as possible by hand.
4. Using a spanner, grip the nut on the unit tubing.
5.
While firmly gripping the nut, use a torque
wrench to tighten the flare nut according to
the torque values in table 7.5.
NOTE: Use both a spanner and a torque wrench
when connecting or disconnecting pipes to/from
the unit.
Fig. 7.8
CAUTION
• Ensure to wrap insulation around the piping.
Direct contact with the bare piping may result
in burns or frostbite.
• Make sure the pipe is properly connected.
Over tightening may damage the bell mouth
and under tightening may lead to leakage.
NOTE ON MINIMUM BEND RADIUS
Carefully bend the tubing in the middle according
to the diagram below. DO NOT bend the tubing
more than 90° or more than 3 times.
Bend the pipe with thumb
min-radius 10cm (3.9”)
Fig. 7.9
6. After connecting the copper pipes to the
indoor unit, wrap the power cable, signal
cable and the piping together with binding
tape.
NOTE: DO NOT intertwine signal cable with
other wires. While bundling these items
together, do not intertwine or cross the signal
cable with any other wiring.
7.
Thread this pipeline through the wall and
connect it to the outdoor unit.
8.
Insulate all the piping, including the valves
of the outdoor unit.
9.
Open the stop valves of the outdoor unit
to start the flow of the refrigerant
between the indoor and outdoor unit.
CAUTION
Check to make sure there is no refrigerant leak
after completing the installation work. If there is
a refrigerant leak, ventilate the area immediately
and evacuate the system (refer to the Air
Evacuation section of this manual).
Page 19 
Refrigerant Piping Connection
Ø 22
109.5-133.7 N.m
(1117-1364 kgf.cm) 27/1.06 27.3/1.07

TAKE NOTE OF FUSE SPECIFICATIONS
The air conditioner’s printed circuit board (PCB)
is designed with a fuse that provides overcurrent
protection. The specifications of the fuse are
printed on the circuit board, examples of such
are T5A/250VAC and T10A/250VAC.
Wiring
Safety Precautions
WARNING
•Disconnect the power supply before
working on the unit.
• All wiring must be performed according to
local and national regulations.
• Wiring must be done by a qualified
technician. Improper connections may
cause electrical malfunction, injury, or fire.
• An independent circuit and single outlet
must be used for this unit.
DO NOT plug another appliance or
charger into the same outlet. If the cannot
handle the load or there is a defect in the
wiring, it can lead to shock, fire, and unit
and property damage.
• Connect the power cable to the terminals
and fasten it with a clamp. An insecure
connection may cause fire.
• Make sure that all wiring is done correctly
and the control board cover is properly
installed. Failure to do so can cause
overheating at the connection points, fire,
and electrical shock.
• Ensure that main power supply connection
is made through a switch that disconnects
all poles, with contact gap of at least 3mm
(0.118”).
• DO NOT modify the length of the power
cord or use an extension cord.
CAUTION
• Connect the outdoor wires before
connecting the indoor wires.
• Make sure you ground the unit. The
grounding wire should be located away
from gas pipes, water pipes, lightning rods,
telephone wires or other grounding wires.
Improper grounding may cause electrical
shock.
• DO NOT connect the unit to the power
source until all wiring and piping is
completed.
•Make sure that you do not cross your
electrical wiring with your signal wiring.
This may cause distortion and interference.
To prevent distortion when the compressor starts
(you can find the unit’s power information on
the rating sticker):
• The unit must be connected to the main
outlet. Normally, the power supply must
have a impedance of 32 ohms.
• No other equipment should be connected
to the same power circuit.
Outdoor Unit Wiring
WARNING
Before performing any electrical or wiring work,
turn off the main power to the system.
1.
Prepare the cable for connection
a.
You must first choose the right cable size.
Be sure to use H07RN-F cables.
Table 8.1: Minimum Cross-Sectional Area
of Power and Signal Cables in North
America
Rated Current of
Appliance (A) AWG
718
7 - 13 16
13 - 18 14
18 - 25 12
25 - 30 10
Page 20 
8
Wiring