Midea MSMBAU-09HRDN1-QRD0GW(B) User manual

Installation Manual
Mission Series
R410a Models
R32 Models

a. Indoor Unit Parts .............................................. 07
b. Indoor Unit Installation Instructions .................. 08
a. Outdoor Unit Installation Instructions ................. 11
b. Outdoor Unit Types and Specifications ............... 12
c. Notes on Drilling Hole in Wall ............................. 13
Table of Contents
Installation Manual
1
2
5
3
4
6Drainpipe Installation ............................... 14
Outdoor Unit Installation ......................... 11
Indoor Unit Installation ........................... 07
Accessories ............................................. 04
Safety Precautions ............................. 05
Installation Overview ....................... 06
Installation Manual

Page 3 
MC MC
7
8
9
10
11
LN
12
Refrigerant Piping Connection............... 17
Wiring................................................. 20
Pressure test and evacuation...............................24
Test Run.................................................27
13
A. Notes on Pipe Length and Elevation .................17
........
a. Outdoor Unit Wiring ..........................20
b. Indoor Unit Wiring .............................21
c. Power Specifications ...........................22
d. Wiring Diagram....................................23
Caut ion: Ri sk of fire
(for R32
B. Refrigerant Piping Connection Instructions........18
Service Info..............................28
14
Installation Manual
Installation Manual

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 cause the
equipment to fail.

Page 5 
Safety Precautions 2
Read Safety Precautions Before Installation
potential damage or injuries is classified as either a WARNING or CAUTION.
WARNING
• Carefully read the Safety Precautions before installation.
•
• 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.
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.
national regulations.
Failure to observe a caution may result in injury or equipment damage.
WARNING
CAUTION
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
Incorrect installation due to ignoring instructions can cause serious damage or injury. The seriousness of
Failure to observe a warning may result in death. The appliance must be installed in accordance with
conditioning units is highly recommended.
In certain functional environments, such as server rooms, etc., the use of specially designed air-
NOTE:Requirements for units using R32 Refrigerant.
Do not accelerate the defrosting process or to clean, other than those
recommended by the manufacturer.
The system should not be installed in areas with ignition sources
(for example: open flames,an operating gas appliance or an operating
electric heater)
Do not pierce or burn.
The system should be installed where the room size corresponds to specific
operation.
Be aware that refrigerants may not contain an odour.

Page 6 
Installation Overview 3
Unit Installation
Overview
INSTALLATION ORDER

Page 7 
Indoor Unit Installation 4
Safety Precautions
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.
CAUTION
Indoor Unit
Installation
• Install the indoor and outdoor units, cables and
to prevent static or image distortion. Depending
• If the indoor unit is installed on a metal part of the
building, it must be electrically grounded.
on the appliances, a 1m distance may not be
wires at least 1m from televisions or radios

Page 8 
Indoor Unit Installation 4

Page 9 
Indoor Unit Installation 4
For MSMBAU-09HRFN1-QRD0GW:
For MSMBBU-12HRFN1-QRD0GW:
For MSMBCU-18HRFN1-QRD0GW:
For MSMBDU-24HRFN1-QRD0GW:

Page 10 
Indoor Unit Installation 4

Page 11 
Outdoor Unit Installation 5
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 pipe length between the outdoor and indoor unit
may not exceed the maximum allowable pipe length.
Strong wind
Strong wind
Strong wind
Fig. 5.1
Step 2: Install outdoor unit.
Fix the outdoor unit with anchor bolts (M10)
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
Outdoor Unit
Installation
>60cm
Fig. 5.2
If the location is exposed to strong winds the unit
must be placed against the wall to shelter it from
the wind.

Page 12 
Outdoor Unit
Installation
Since the gravity center of the unit is not at its physical center, so please be careful when lifting it with a sling.
Never hold the inlet of the outdoor unit to prevent it from deforming.
Do not touch the fan with hands or other objects.
Do not lean it more than 45, and do not lay it sidelong.
Make concrete foundation according to the specifications of the outdoor units.
Fasten the feet of this unit with bolts firmly to prevent it from collapsing in case of earthquake or strong wind.
Outdoor Unit Installation Instructions
For MOB01-09HFN1-QRD0GW, MOB01-12HFN1-QRD0GW, MOB01-18HFN1-QRD0GW,

8 0 0 W
5 1 4 W 1
815 W3
333 D
70 W2
H
H1
H2
D1
D2 D3
62 B1
20 A1
61.6 A2
For MOB02-18HFN1-QRD0GW
Page 13 
Outdoor Unit Installation Instructions

For MOCA02-24HFN1-QRD0GW,
Page 14
Outdoor Unit Installation Instructions

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)
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. 5.11)
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. 5.11
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.
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.
Outdoor Unit
Installation
Using a 65-mm core drill, drill a hole in the wall.
Page 15 
evoba
mc06
60cm
on right
30cm
on left
200cm
in front
30cm

Drainpipe Installation 6
Page 16

Refrigerant Piping Connection 7
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
Maximum drop
height
Refrigerant Piping
Connection
Based on Models. (Unit: meters)
09 25
CAUTION
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.
Refrigerant Piping Connection Instructions
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.
Model Length of
piping
Page 17 
12 25 10
18 30 20
24 25

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
Step 2: Remove burrs.
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
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.
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
Refrigerant Piping
Connection
piping connection. They must be completely
removed.
Point down
Burrs can affect thegas-tight seal of refrigerant
Refrigerant Piping Connection 7
Page 18 
Step 3: Flare pipe ends
Proper flaring is essential to achieve an
Fig. 7.3

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 7-3.
Table 7.3: PIPING EXTENSION BEYOND FLARE FORM
Pipe
gauge
Tightening
torque
Flare dimension (A) Flare shape
Min. Max .
14.2-17.2 N.m
(144-176 kgf.cm)
R0.4~0.8
45 °±2
90 °
±4
A
Fig. 7.6
32.7-39.9 N.m
(333-407 kgf.cm)
49.5-60.3 N.m
(504-616 kgf.cm)
61.8-75.4 N.m
(630-770 kgf.cm)
97.2-118.6 N.m
(990-1210 kgf.
cm)
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-.3.
NOTE: Use both a spanner and a torque wrench when
connecting or disconnecting pipes to/from the unit.
Fig. 7.8
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).
Refrigerant Piping
Connection
109.5-133.7 N.m
(1117-1364 kgf.
cm)
(Unit: mm)
Page 19 
8.3 8.3
12.4 12.4
15.4 15.8
18.6 19
22.9 23.3
27 27.3

8
Safety Precautions
WARNING
• Be sure to disconnect the power supply before
working on the unit.
• All electrical wiring must be done according to
local and national regulations.
• Electrical wiring must be done by a qualified
technician. Improper connections may cause
electrical malfunction, injury and fire.
• An independent circuit and single outlet must
• 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 supply connection is made
through a switch that disconnects all poles, with
CAUTION
• Connect the outdoor wires before connecting the
indoor wires.
• Make sure you ground the unit. The grounding
wire should be away from gas pipes, water pipes,
lightning rods, telephone or other grounding
wires. Improper grounding may cause electrical
shock.
• DO NOT connect the unit with the power source
until all wiring and piping is completed.
• Make sure that you do not cross your electrical
wiring with your signal wiring, as this can cause
distortion and interference.
Follow these instructions to prevent distortion when the
compressor starts:
• The unit must be connected to the main outlet.
Normally, the power supply must have a low output
impedance of 32 ohms.
• No other equipment should be connected to the
same power circuit.
• The unit’s power information can be found on the
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
Rated Current of
Appliance (A) Nominal Cross-Sectional
Area (mm²)
6 0.75
6 - 10 1
10 - 16 1.5
16 - 25 2.5
25- 32 4
32 - 45 6
Wiring
contact gap of a least 3mm.
Wiring
be used for this unit. If the
electrical circuit capacity is not enough or there
is a defect in the electrical work, it can lead to
shock, fire, unit and property damage.
Page 20 
NOTE: The fuse is made of ceramic.
rating sticker on the product.