Midea MTI-24FNXD0 MOU-24FN1-QD0 User manual

MTI-36FNXD0 MOU-36FN1-QD0
MTI-48FNXD0 MOU-48FN8-RD0
MTI-55FNXD0 MOU-55FN8-RD0
MTI-24FNXD0 MOU-24FN1-QD0
MTI-24FNXD0 MOU-24FN8-QD0
MTI-36FNXD0 MOU-36FN1-RD0
MTI-36FNXD0 MOU-36FN8-QD0
MTI-36FNXD0 MOU-36FN8-RD0

Accessories .................................................... 04
a. Indoor Unit Parts ........................................ 08
b. Indoor Unit Installation Instructions ....... 08
Safety Precautions ..................................... 05
Outdoor Unit Installation......................... 13
a. Outdoor Unit Installation Instructions ...... 13
b. Outdoor Unit Types and Specifications .... 14
c. Notes on Drilling Hole in Wall .................... 15
Drainpipe Installation ............................... 16
Table of Contents
Installation Manual
Indoor Unit Installation ........................... 08
Installation Overview ............................... 07
1
2
5
3
4
6
Indoor Unit Installation ........................... 07

Page 3 
Refrigerant Piping Connection....................... 18
A. Notes on Pipe Length and Elevation .............. 18
B. Refrigerant Piping Connection Instructions ...20
Wiring................................................. 22
a. Outdoor Unit Wiring .................. 22
b. Indoor Unit Wiring ..................... 23
c. Power Specifications ................... 25
Air Evacuation.................................................. 27
a. Evacuation Instructions ................................ 27
b. Note on Adding Refrigerant ....................... 28
Test Run.......................................................................................... 29
MC MC
7
8
9
10
L N
European Disposal Guidelines ............................ 30
11
Information Servicing............................................................... 31
12
(R32/R290 refrigerant )
C au t i o n: Risk of fire

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 re, or equipment failure.
Connecting wire for display (2m)
Cord protection rubber ring
QUANTITY
SHAPENAME
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 dier from appliance to
appliance. To meet dierent 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 dier from appliance to
appliance. To meet dierent 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 dier from appliance to
appliance. To meet dierent 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
Orice (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.
Failure to observe a warning may result in death. The appliance must be installed in
accordance with national regulations.
Failure to observe a caution may result in injury or equipment damage.
WARNING
CAUTION
WARNING
• Appliance shall be installed, operated and stored in a room with a oor area larger than X m²,
installation of pipe-work shall be kept to a minimum X m²(Please see the following form ).
The appliance shall not be installed in an unventilated space, if that space is smaller than X m²
(Please see the following form ).Spaces where refrigerant pipes shall be compliance with
national gas regulations.
• Any person who is involved with working on or breaking into a refrigerant circuit should hold a
current valid certicate from an industry-accredited assessment authority, which authorises their
competence to handle refrigerants safely in accordance with an industry recognised assessment
specication.
• Servicing shall only be performed as recommended by the equipment manufacturer.
Maintenance and repair requiring the assistance of other skilled personnel shall be carried out
under the supervision of the person competent in the use of ammable refrigerants.
• Appliance shall be stored in a well-ventilated area where the room size corresponds to the room
area as specied for operation.
• Appliance shall be stored in a room without continuously operating open ames (for example
an operating gas appliance) and ignition sources (for example an operating electric heater).
• The appliance shall be stored in a room without continuously operating ignition sources
(for example: open ames, an operating gas appliance or an operating electric heater).
• Do not pierce or burn.
• The appliance shall be stored so as to prevent mechanical damage from occurring.
•
• Be aware that the refrigerants may not contain an odour.
• Keep ventilation openings clear of obstruction.
Compliance with national gas regulations shall be observed.
• A warning that the appliance shall be stored in a well-ventilated area where the room size
corresponds to the room area as specied for operation.
• The appliance shall be stored in a room without continuously operating ignition sources
(for example: open ames, an operating gas appliance or an operating electric heater).
Do not pierce or burn.
The appliance shall be stored so as to prevent mechanical damage from occurring.
Be aware that the refrigerants may not contain an odour.
Compliance with national gas regulations shall be observed.
Keep ventilation openings clear of obstruction.
A warning that the appliance shall be stored in a well-ventilated area where the room size
corresponds to the room area as specied for operation.
•
•
•
•
•
•

Page 6  Page 6 
Amount of refrigerant
to be charged (kg) maximum installation
height (m) Minimum room area (m²)
≤2.048 1.8m 4
2.048-3.0 1.8m 8
>3.0 1.8m 9
Model
(Btu/h)
≤30000
30000-48000
>48000
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.
CAUTION
CAUTION
CAUTION
This symbol shows that a service personnel should be handling this
equipment with reference to the installation manual.
This symbol shows that information is available such as the operating
manual or installation manual.
This symbol shows that this appliance uses a ammable refrigerant. If the
refrigerant is leaked and exposed to an external ignition source, there is a
risk of re.
This symbol shows that the operation manual should be read carefully.
WARNING
CAUTION
Explanation of symbols displayed on the indoor unit or outdoor unia
(applicable to the unit adopts R32/R290 Refrigerant only):
WARNING
• Appliance shall be installed, operated and stored in a room with a oor area larger than X m²,
installation of pipe-work shall be kept to a minimum X m²(Please see the following form ).
The appliance shall not be installed in an unventilated space, if that space is smaller than X m²
(Please see the following form ).Spaces where refrigerant pipes shall be compliance with
national gas regulations.
• Any person who is involved with working on or breaking into a refrigerant circuit should hold a
current valid certicate from an industry-accredited assessment authority, which authorises their
competence to handle refrigerants safely in accordance with an industry recognised assessment
specication.
• Servicing shall only be performed as recommended by the equipment manufacturer.
Maintenance and repair requiring the assistance of other skilled personnel shall be carried out
under the supervision of the person competent in the use of ammable refrigerants.
• Appliance shall be stored in a well-ventilated area where the room size corresponds to the room
area as specied for operation.
• Appliance shall be stored in a room without continuously operating open ames (for example
an operating gas appliance) and ignition sources (for example an operating electric heater).

Overview
Installation Overview 3
L N
123
4
5
MC MC
6
7
Install the indoor unit
(Page 8)
INSTALLATION ORDER
Install the outdoor unit
(Page 13) Install the drainpipe (Page 16)
Evacuate the refrigeration system
(Page 27) Connect the wires (Page 22) Connect the refrigerant pipes (Page 18)
Perform a test run
(Page 29)
Page 7  

Page 8 
Unit Installation
Indoor Unit
Installation
Indoor Unit Installation 4
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 death.
• DO NOT install the indoor unit in the
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 electrically
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 exists for installation and
maintenance.
Enough room exists 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:
In areas with oil drilling or fracking
In coastal areas with high salt content in the
air
In areas with caustic gases in the air, such as
near hot springs
In areas with power fluctuations, such as
factories
In enclosed spaces, such as cabinets
In kitchens that use natural gas
In areas with strong electromagnetic waves
In areas that store flammable materials or gas
In rooms with high humidity, such as
bathrooms or laundry rooms
Fig. 4.2
Air outlet
Air inlet
Air filter(on some models)
Drain hose
Electric control cabinet
Refrigerant connecting pipe
checking orice
60cmX60cm
30cm or more
20cm or more
Maintenance roomage
√
√
√
√
√
√
Safety Precautions
Models with a cooling capacity of 9000Btu to
18000Btu only apply to one room.
√

Page 9 
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 lter
Descending ventilation opening and mounted hook
Air lter
Electric control box
Table.4-1 (unit: mm/inch)
MODEL
(Btu/h)
Outline dimension
A B C
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
D E F
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

Indoor Unit
Installation
Page 10
Cut o 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
angle steel
Fig. 4.9
Screw nut
Washer
Hanging screw bolt
Overhang part
Shockproof cushion
NOTE: Conrm 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 t pipes and wires after you have
nished 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 at using a level indicator to prevent
leaks. (See Fig. 4.9).
Fig. 4.8