Midea MDV-D28Q1/BN2 User manual

Digital Scroll Central
Air-Conditioner
Please read this manual carefully before operation and keep it in a safe place for
future reference.
One-Way Cassette Type Indoor Unit (With Panel)
Installation Manual
Model:
MDV-D28Q1/BN2
MDV-D36Q1/BN2
MDV-D45Q1/BN2
MDV-D56Q1/BN2
MDV-D71Q1/BN2

1.Accessories----------------------------------------------------------------------1
2.Installation Iocation
3.Install indoor unit
4.Drain pipe
5.Electric wiring
6.Install the panel
7.Refrigerant pipe installation
8.Control
9.Trouble shooting table
10.
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Install electric throttle part--------------------------------------------------------11
CONTENTS

Please read this installation manual carefully before installation.
The air conditioner must be installed by qualified service person.
When installing the indoor unit , please follow this manual as strictly as possible.
Check the piping is accomplished perfectly before electrifying the unit.
This manual is subject to changes due to technological improvement without further notices.
Note: The installer should illustrate to users how to correctly use and maintain the appliance
,
and remind the users carefully reading and keeping both installation manual and owner s
Manual after the installation.
1
2
1
2
5
1
Name
Indoor unit installation manual
Insulation pipe
Remote controller(including
operation manual)
Alkaline dry batteries (Am4)
Screw M4 16(including flat
*
spring gasket)
Installation pattern paper
Installation indicator
Fixing belt
Straight pipe
Elbow
Big gasket
Electric throttle part
Insulation for pipe connection part
For fixing the installation pattern paper
and panel(only for 28,36 model)
Adjust ceiling hole and position of indoor
unit(only for 28,36model)
Adjust main unit position(only for 45,56,
71 model)
Fixing and tightening
Drainage
Connect drain pipe and straight pipe
Hang the indoor unit
,
Qty Shape Usage
ACCESSORIES
Cautions on remote controller installation:
Don t throw the remote controller or give it big impact.
The remote controller should be in the reception range, and the transmittal part should point
to the orientation of indoor unit receptor.
Before installation, operate the remote controller to determine its location in a reception range.
Keep the remote controller at least 1m apart from the nearest TV set or stereo equipment. (It
is necessary to prevent image disturbances or noise interferences.)
Do not install the remote controller in a place exposed to direct sunlight or close to a heating
source, such as a stove.
Note that the positive and negative poles are right positions when loading batteries.
8
2
2
10
1
1
1
This manual

INSTALLATION LOCATION
CAUTIONS
1.Please avoid installing in the following places
A place with flammable gas or material.
A saline place such as a seashore vicinity
A place with sulphur gas.
A place with oil gas, such as kitchen.
A place with high-humidity air.
An unbearable place.
A place where high-frequency waves are generated.
2. Please comply with the related national electric standard to make electric insulation for
construction and metal parts of air-conditioner.
3. Please choose the place where the ventilation is good.
INSTALL INDOOR UNIT
Ceiling
1000mm
above
1000mm
above
Obstacle
(Pipe side)
Refrigerant Pipe
100mm
above
245mm
above
Ceiling
100mm
above
200mm
above
Air outlet side Air inlet side
MDV-D45~71Q1/BN2MDV-D28~36Q1/BN2
INSTALL SPACE
200mm
above
Hanging screw bolt
distance 890
Hanging screw
bolt distance
screw bolt distance 1230
MDV-D28~36Q1/BN2
MDV-D45~71Q1/BN2
screw bolt distance 330
530
2
Please install with f10 hanging screw bolts.
1. The size of the ceiling to be handled------ Do keep the
ceiling flat. Consolidate the roof beam for possible
vibration.
2. Cut off the roof beam.
3. Strengthen the place that has been cut off, and
consolidatethe roof beam.
4. Connect wires and pipes inside the ceiling after the air
conditioner is hanged.
Please refer to the following figure for the hanging
screw bolts distance
The handling to the ceiling varies from the constructions,
consult the construction person for the specific condition.

Steel bar
Embedding screw bolt
(Pipe hanging and embedding
screw bolt)
Roof beam
Hanging screw bolts
Ceiling
Timber over the beam (Blade shape
insertion)
(Slide insertion)
Put the square timber traversely over the
roof beam, then install the hanging screw
bolts.
Inlaying or embedding the screw bolts.
WOODEN CONSTRUCTION
NEW CONCRETE BRICKS
Install and use directly the supporting angle
steel.
FOR ORIGINAL CONCRETE BRICKS
STEEL ROOF BEAM STRUCTRUE
Hanging screw bolt
Hanging bolts
Supporting
angle steel
2. Overhanging the indoor unit
Adjust the gasket (down side) to 137mm over the
ceiling for MDV-D28~36Q1/BN2 type and for
MDV-D45~71Q1/BN2type adjust that to
130mm.
130mm
Down Side of the ceiling
Hanging Bolt
Nut (Up Side)
Gasket( Up Side)
Installing Ear
Gasket (Down Side)
Nut (Down Side)
Install the hanging bolt into U groove of the hanging tool. Overhang the indoor unit and ensure
it is level using a level gauge.
Fasten the upside nut
Level gauge
Secure it safety
3
(137mm)
After the selection of installation location, position the refrigerant pipes, drain pipes,
indoor & outdoor wires to the connection places before hanging up the machine.
The installation of hanging screw bolts.
Install the hanging hook with expansible
bolt into the concrete deep to 45~50mm
to prevent loose.

Pattern Paper
Panel fixing screw (M4X16)
Ceiling hole
width
Ceiling hole length
Outline of Indoor Unit
Hole
MDV-D28~36Q1/BN2
Adjust the relative position between indoor
unit and ceiling hole with the pattern paper
again.
MDV-D45~71Q1/BN2
Panel outline dimension1420
Ceiling hole dimension 1360
Panel center 585
30
65
50 630 570 110
655
695
755
125
30
530 30
30
645
Panel outline dimension
Ceiling hole dimension
15
20
50 110
Indoor unit
ceiling
installation paper pattern
Front (side of pipe)
Back
ceiling
Installation Paper Pattern
¢Ù ¢Ú
¢Û
Install the hanging nut into U grove of the
hanging tool. Overhang the indoor unit and
ensure it is level using a level gauge.
Use the installation paper pattern to confirm
the position between the body and the ceiling
opening
Please refer to the following figure to install.
Fix the pattern paper to the down side of indoor
unit with panel fixing screw.
Adjust the size of ceiling hole according to
pattern paper.
Pattern paper
Down side of pattern paper Down side of ceiling
Indoor unit
Down side of
pattern paper
at the same level
Down side of ceiling
Down side of ceiling must be level with
down side of the pattern paper.
Panel Length
Panel Centre
Indoor Unit size
Ceiling Hole Length
Hanging Bolts Distance
Hanging Bolts
Distance
Panel Width
Indoor Unit Size
Ceiling Hole Width
4

DRAIN PIPE
When connecting the pipe, please use the sealing material and pipe glove.
CAUTION
Bend
Fold
1.5m~2m
Lean downward over 1/100
As long as possible about(10cm)
Lean downward
over 1/100
Vp30
The drain pipe of indoor unit must be heat
insulated, or it will condense dew, as well
as the connections of the indoor unit.
Hard PVC binder must be used for pipe
connection, and make sure there is no
leakage.
With the connection part to the indoor unit,
please note not to impose pressure
on the side of indoor unit pipes.
When the declivity of the drain pipe down-
wards is over 1/100, there should not be any
winding.
The total length of the drain pipe when pulled
out breadthwise shall not exceed 20m. When
the pipe is over long, a bracket must be
installed to prevent winding.
Refer to the following figures to install the pipes.
Upward drainage
To make sure that the drainage pipe would not slant downward. Lead it upward to a height 340
mm maximum, then downward lead it.
When the drainage is upward, the upward drain pipe and elbow of the accessories must be
adopted and the height is less than 500mm,otherwise the drain pump water level switch
malfunction will be caused.
¢Ù
No more than
VP16
VP25
*2(140)
*1(500below)
1. When adopting upward drain pipe,
out off VP16 pipe to do the piping
2. The VP 25 pipe is elicited breadthwise.
After upward piping, the lead drain pipe must slant downward immediately.(over 1/100)
Insulation material
1) Stow 600-800cc water with pot or hose from outlet slowly.
2) The drainage test is doing during checking the drain pump motor running sound .
3) After the preparation work , disconnect the water level switch ,power 220-240VAC to of
terminal board, and the drain pump start up immediately.
4) Confirm the running sound of drainage pump motor ,and carry out the drainage test.(If the sound
is variable from continuous to discontinuous ,it is normal.)
5) Reset the water level switch connector to original position after the drainage test .
Drainage test
L
N
5

Outlet
Water Container
1 23
PCB connection(CN10)
1357
RED
PURPLE
RED WHT BLK Water lever
switch
WHT
BLK
Singe phase
WHT
ELECTRIC WIRING
!WARNING
Specified power cables should be used. Do not apply any pressure on the
terminals used to connect.
Grounding must be properly done.
Electric Wiring must be done by professionals. Use a separate circuit according
to national regulations.
Improper connection may cause fire.
The grounding wire should be away from gas pipes, water pipes, telephone,
lightening rods or other grounding wires. Improper grounding may cause electric
shock.
If the wiring capacity is not enough, electric shock or fire may occur.
Be sure to Install Current Leakage Protection Switch. Or electric shock may occur.
Power cord is to be selected according to national regulations.
Outdoor unit power cord should be selected and connected according to the outdoor unit
installation manual.
Wiring should be away from high temperature components, or the insulation layer of the
wires may melt down.
Use wire clamp to fix the wires and terminal block after connection.
Control wire should be wrapped together with heat insulated refrigerant pipes.
Connect the indoor unit to power only after the refrigerant has been vacuumed.
CAUTION
CAUTION
Don t connect the power wire to the signal wire connection end.
6

Indoor unit power supply and the signal wire wiring
220-240V~ 50Hz
Outdoor Power
Supply
Indoor Power
Supply
(2-cord screened wire)
Creepage Protection
Switch
Creepage Protection
Switch
Ground Wire
380V ~
Outdoor Unit
Ground Wire
Connect to close end
of the screened wire
Indoor Unit
Indoor Unit
Wire Distribution Box
Wiring connection hole
Use the insulation materials (on field) to seal the wiring hole of the unit, or insufficient sealing
will cause condensate dew.
Panel wiring
Install the panel with vane
Connect the swing motor terminal block according to the panel installation manual.
7
Wiring specifications are listed below, insufficient capacity would over-heat the wire or destroy
the machine.
Model
Items
Power Cord of the Indoor Unit Control Wire
Diameter
Ground
Wire
Single-
Wire
Power
Capacity Fuse Below 20m
Twisted-pair
2-core screened wire
Twisted-pair
Below 50m
Quantity
Power Switch Power Cord
Indoor/Outdoor Unit
Signal Wire
Single Phase
220-240V~
50Hz
2
2mm 2
6mm
Not longer than 1500m
2
2mm
2
f1.5mm
15A
MDV-D28~71Q4/N2
15A
WIRING SPECIFICATIONS
The indoor unit power source should not be shared with outdoor unit.
The indoor units that connect to the same outdoor unit should use the same power source, creepage
protector and main switch.
The indoor power wire should be connected to the L N terminal , and the indoor/outdoor signal
wire should adopt the 2-core screened wire . The indoor /outdoor signal wire should be connected
to A B terminal and should be corresponding with the A B of the outdoor terminal. Connect the
screened layer to (E).
Indoor/Outdoor
Signal wire

INSTALL THE PANEL
NOTE
The panel and the ceiling, the panel and the unit body should be connected closely ,
or air leakage water leakage and condensate dew will be caused.
Please refer to the panel installation manual to install the panel.
Please confirm if the installation places of unit body and panel are proper.
!CAUTION
REFRIGERANT PIPE INSTALLATION
Ventilate the air if there was any refrigerant leakage during the installation.
Make sure there is no refrigerant leakage after the installation.
Leaked refrigerant will generate poisonous gas if meeting fire.
Leaked refrigerant will generate poisonous gas if meeting fire.
Allowed Length and Drop of Pipes
Material and Size of the Pipes
Requirements are different when installing the outdoor unit, please refer to outdoor unit
installation manual for detailed information.
Three length (3m,5m,10m) of pipes are available to purchase.
f19
Copper Pipe for Air ConditionerPipe Material
Size(mm) Gas side
Liquid side
Refrigerant Volume to Be Added
Refrigerant volume to be added is calculated according to outdoor unit installation manual (R407C).
Be sure to add refrigerant measuring by a scale.
If the added refrigerant volume is inadequate (too much or insufficient), the compressor
malfunction will be caused. Be sure to calculate the refrigerant volume carefully.
The service man should write down the piping length and the added refrigerant volume
in the nameplate, which is on the electric control box cover of outdoor unit, for
diagnosing the compressor and refrigeration circulation malfunction.
CAUTION
f9.53
8

As per the different usages to set the moving switch on the PCB in the electric control box of
indoor unit.
After the setting , be sure to cut down the main power supply switch , then turn it on again
Setting would be invalid without disconnecting the power.
Please number the indoor units during the installation . For example, for the first outdoor unit ,the
number of the first indoor unit is 1-1, the second indoor unit is 1-2, and the set address is 1 and 2
respectively , the others is analogical.
Pipe external diameter wrench torque Added wrench torque
9.5
19.0
24.5(2.5kgf.m)
98.8(10.0kgf.m)
29.4(3.0kgf.m)
117.7(12.0kgf.m)
F
F
Connection of the Refrigerant Pipe
Double-span should be used when connecting the pipes.
The wrench torque follow the below table:
Air Purging
Open/Close the valves
Leakage Test
Heat Insulation
Wrap to the foot of the piping
Field Piping side
Unit Body
Attached Heat Insulation Material
Use a vacuum pump, to vacuum from the gas side refrigerant adding mouth of the outdoor
unit.
Open/Close the spools or the valves of outdoor unit with a f5mm hexagon spanner.
Test if there is any leakage on the connections of the piping with soap water.
Heat insulation for the gas and liquid pipe separately.
Heat insulation should be fully and carefully done, because the liquid side pipe and gas side
pipe are easy to condense water due to low temperature when cooling.
O
Heat proof above 120 C material should be used at the gas side pipe.
The indoor unit connection parts should be no-gap heat-insulated with the attached heat
insulation materials.
Don t use the refrigerant of the outdoor unit to do the vacuum. (A certain volume of
refrigerant had been added into the outdoor unit in factory.)
CONTROL
9

10
ENC2
Toggle switch
For set horsepower
Note: The horsepower
has been set before
leaving the factory ,
anyone can t
modify it except the
maintenance person.
Code Capacity(Horsepower)
0
1
2
3
4
5
6
7
8
9
2200W(0.8HP)
14000W(5.0HP)
11200W(4.0HP)
9000W(3.2HP)
8000W(3.0HP)
7100W(2.5HP)
5600W(2.0HP)
4500W(1.5HP)
3600W(1.2HP)
2800W(1.0HP)
ENC1
TOGGLE SWITCH FOR SETTING ADDRESS
'0-F' show the address '0-F' respectively, that is, '0-15' indoor unit (together 16
units), and the others follow the analogy. If two addresses are the same in
one system , the abnormal operation will occur.
0
1
F
2
3
E
4
D
5
C
6
B
7
A
8
9
0
1
F
2
3
E
4
D
5
C
6
B
7
A
8
9
ENC2ENC1

11
1
2
3
4
5
No. Typ e Contents LED Lamp flash Remarks
Mode conflict
Water level switch is
abnormal
Malfun-
ction
Malfun-
ction
Malfun-
ction
Malfun-
ction
Alarm
The evaporator sensor
check point is abnomal ,
or room temp.sensor is
abnormal.
Run lamp flashes
at 2.5Hz.
After the malfunctions
disappear, it restores
automatically.
Indoor/outdoor unit com-
munication is abnormal.
The timer lamp fla-
shes at 2.5Hz.
Condenser sensor check
point is abnormal or outdoor
temp.
sensor is abnormal.
All the indoor alarm
lamps flash at 0.5Hz.
After the malfunctions
disappear, it restores
automatically.
If the malfunctions can t
be solved in three min.
all the indoor alarm
lamps flash at 0.5Hz.
Turn off the power to restore.
Alarm lamp flashes
at 2.5Hz.
Defrost lamp
flashes at 2.5Hz.
When the indoor unit turns
to heating mode or is turned
off, the alarm will disappear.
Run lamp
Timer lamp
Defrost lamp
Alarm lamp
Manual Switch
TROUBLE SHOOTING
INSTALL ELECTRIC THROTTLE PART
Please refer to the following figures to install.
The installation size is as follows:
266
165
215
75
Electric throttle part wires group
Indoor unit input pipe
Connection pipe copper nut joint
Electric throttle part pipe joint
Indoor unit input pipe joint
Electric throttle part pipe joint
Vertically upward install
NOTE
The electric throttle part should be installed vertically upward ,the slant and invertion are not allowed.
Use two spanners to connect the electric throttle parts with indoor/outdoor pipes to avoid the copper pipe cracking.
Please pay attention to the connection orientation when connecting.(Refer to the label sticking on the electric throttle
part.)
The size of electric throttle part : 215(L)X165(W)X75(H)mm.
The electric throttle part wires group connector is corresponding to the connector CN 15 on the indoor PCB.
After the malfunctions
disappear, it restores
automatically.

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