Midea HORIZONTAL Series User manual

D40-20A
D50-20A
D80-20A
D100-20A
USER MANUAL
Warning notices: Before using this product, please read this manual carefully and keep it for future reference.
The design and specifications are subject to change without prior notice for product improvement.
Consult with your dealer or manufacturer for details.
The diagram above is just for reference. Please take the appearance of the actual product as the standard.
HORIZONTAL SERIES
Storage Electric Water Heater

01
THANK YOU LETTER
Thank you for choosing Midea! Before using your new Midea product, please read
this manual thoroughly to ensure that you know how to operate the features and
functions that your new appliance oers in a safe way.
CONTENTS
0
02
1
10
08
11
12
13
13
04
05
07
14
THANK YOU LETTER
SAFETY INSTRUCTIONS
SPECIFICATIONS
PRODUCT OVERVIEW
QUICK START GUIDE
PRODUCT INSTALLATION
OPERATION INSTRUCTIONS
CLEANING AND MAINTENANCE
TROUBLESHOOTING
TRADEMARKS, COPYRIGHTS AND LEGAL STATEMENT
DISPOSAL AND RECYCLING
DATA PROTECTION NOTICE

The following safety guidelines are intended to prevent unforeseen risks or damage from
unsafe or incorrect operation of the appliance. Please check the packaging and appliance
on arrival to make sure everything is intact to ensure safe operation. If you find any
damage, please contact the retailer or dealer. Please note modifications or alterations to
the appliance are not allowed for your safety concern. Unintended use may cause
hazards and loss of warranty claims.
Intended Use
Warning
The signal word indicates a hazard with a medium level of risk which, if
not avoided, may result in death or serious injury.
Attention
The signal word indicates important information (e.g. damage to
property), but not danger.
Caution
The signal word indicates a hazard with a low degree of risk which, if
not avoided, may result in minor or moderate injury.
Read these operating instructions carefully and attentively before using/commissioning the
unit and keep them in the immediate vicinity of the installation site or unit for later use!
Explanation of Symbols
SAFETY INSTRUCTIONS
02

03
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CAUTION: Risk of injury!
Before installing this water heater,check and confirm that the earthing on the supply
socket is reliably grounded. Otherwise, the electrical water heater can not be installed
and used. Do not use extension boards. Incorrect installation and use of this electrical
water heater may result in serious injuries and loss of property.
Special Cautions
The supply socket must be earthed reliably. The rated current of the socket shall not
be lower than 16A. The socket and plug shall be kept dry to prevent electrical leakage.
The installation height of the supply socket shall not be lower than 1.8m.
The wall in which the electrical water heater is installed shall be able to bear the load
more than two times of the heater filled fully with water without distortion and cracks.
Otherwise, other strengthening measures shall be adopted.
The pressure relief valve attached with the heater must be installed at the cold water
inlet of this heater(see Fig.1), and make sure it is not exposed in the foggy. The water
may be outflowed from pressure relief valve, so the outflow pipe must open wide in
the air; The pressure relief valve need to be checked and cleaned regularly, so as to
make sure it will not be blocked.
When using the heater for the first time(or the first use after maintenance), the heater
can not be switched on until it has been filled fully with water. When filling the water,
at least one of the outlet valves at the outlet of the heater must be opened to exhaust
the air. This valve can be closed after the heater has been filled fully with water.
The water heater is not intended for use by persons(including children)with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instructions concerning use of the appliance by a
person responsible for their safety. Children should be supervised to ensure that they
do not play with the heater.
During heating, there may be drops of water dripping from the pressure release hole
of the pressure relief valve. This is a normal phenomenon. If there is a large amount of
water leak, please contact customer care center for repair. This pressure release hole
shall, under no circumstances, be blocked; otherwise, the heater may be damaged,
even resulting in accidents.
Hot water Cold water (Fig.1)
Pressure relief valve
Thread screw
Drain handle
Pressure release hole
Sewerage exit

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The drainage pipe connected to the pressure release hole must be kept sloping
downwards.
Since the water temperature inside the heater can reach up to 75℃, the hot water
must not be exposed to human bodies when it is initially used. Adjust the water
temperature to a suitable temperature to avoid scalding.
If the flexible power supply cord is damaged, the special supply cord provided by the
manufacturer must be selected, and replaced by the professional maintenance
personnel.
If any parts and components of this electrical water heater are damaged please
contact customer care center for repair.
This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
The maximum inlet water pressure is 0.5MPa; the minimum inlet water pressure is
0.1MPa, if this is necessary for the correct operation of the appliance.
The water may drip from the discharge pipe of the pressure-relief device and that this
pipe must be left open to the atmosphere; The pressure-relief device is to be operated
regularly to remove lime deposits and to verify that it is not blocked;
In order to drain away the water inside the inner container, it can be drained away
from the pressure release valve. Twist the thread screw of the pressure release valve
o, and lift the drain handle upwards.(See Fig.1) A discharge pipe connected to the
pressure-relief device is to be installed in a continuously downward direction and in a
frost-free environment.
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SPECIFICATIONS
D40-20A D50-20A D80-20A D100-20AProduct Model
Volume(L)
Rated Power(W)
Rated Voltage(ACV)
Rated Pressure(MPa)
Max Of WaterTemperature(°C)
ProtectionClass
Water Proof Class
40
2000
220V~
0.75
75
I
IPX4
50
2000
220V~
0.75
75
I
IPX4
80
2000
220V~
0.75
75
I
IPX4
100
2000
220V~
0.75
75
I
IPX4

05
Product
PRODUCT OVERVIEW
D40-20A D50-20A D80-20A D100-20A
A
B
C
D
585
385
385
160
675
385
385
310
760
450
450
297
900
450
450
447
D C
Installation-cover
Hang-plate
(Note:All dimensions are in mm)
A
B
Right cover
Left cover
Thermometer
Shell
Control-box
Temperature
adjusting knob
Hot water
outlet
Heating Element
Inner tank
Thermal
insulation
Anode
Cold water inlet
Power cord

06
Internal Wire Diagram
Accessories
Safety valve Wall hanging screw Plastic expansion pipe
WIRING DIAGRAM
N
E
L
QQ
Heating Element
Heating Indicator Light
Power supply Indicator Light
Thermal
Cut Out
Brown
Blue
Yellow/Green
Thermostat

07
QUICK START GUIDE
Fill the inner tank with water before use.
CAUTION
Before First Use
1. Plug in 2. Rotate the thermostat knob
clockwise to adjust the temperature
inside the water heater.
4. Open the water outlet valve, you
can use hot water.
3. When the water temperature reaches
the adjusted temperature, the heating
will be stopped, and the heating indicator
will be o. When the water temperature
drops to a certain temperature, it will
automatically resume heating.
Ground

1.
2.
This electrical water heater shall be installed on a solid wall. If the strength of the wall
cannot bear the load equal to two times of the total weight of the heater filled fully with
water, it is then necessary to install a special support.
Incase of hollow bricks wall, ensure to fill it with cement concrete completely.
After selecting a proper location, determine the positions of the two install holes used for
expansion bolts with hook (determined according to the specification of the product you
select). Make two holes in the wall with the corresponding depth by using a chopping bit
with the size matching the expansion bolts attached with the machine, insert the screws,
make the hook upwards, tighten the nuts to fix firmly, and then hang the electric water
heater on it (see Fig.2).
3. Install the supply socket in the wall. The requirements for the socket are as
follows:250V/10A, single phase, three electrodes. It is recommended to placed the socket
on the right above the heater. The height of the socket to the ground shall not be less
than 1.8m (see Fig.3). If there is fault on power cable, it should be replaced by the
manufacturers, agencies or qualified person who is able to do this so as to ensure the
safety.
4. If the bathroom is too small, the heater can be installed at another place without
sun-scorched and rain-drenched. However, in order to reduce the pipeline heat losses, the
installation position of the heater shall be closed to the location shall be as near as
possible to the heater.
Installation Instruction
PRODUCT INSTALLATION
(Fig.3)
N (Blue)
L (Brown) E (Yellow/Green)
Ground
≥1.8m
(Fig.2)
Expansion bolt
(with hook)
08

1.
2.
3.
The dimension of each pipe part is G1/2” ; The massive pressure of inlet should use Pa as
the unit; The minimum pressure of inlet should use Pa as the unit.
Connection of pressure relief valve with the heater on the inlet of the water heater.
In order to avoid leakage when connecting the pipelines, the rubber seal gaskets provided
with the heater must be added at the end of the threads to ensure leak proof joints (see Fig.4).
4. If the users want to realize a multi-way supply system, refer to the method shown in fig.5
for connection of the pipelines.
Pipelines Connection
Please be sure to use the accessories provided by our company to install this electric
water heater. This electric water heater can not be hung on the support until it has been
confirmed to be firm and reliable. Otherwise, the electric water heater may drop o from
the wall, resulting in damage of the heater, even serious accidents of injury. When
determining the locations of the bolt holes, it shall be ensured that there is a clearance
not less than 0.2m on the right side of the electric heater, to convenient the maintenance
of the heater, if necessary.
(Fig.4)
(Fig.5)
Pressure relief valve
Water inlet valve
Water inlet valve
Running water pipe
Mixing valve
Water pool
Triple joint Shower nozzle
Hot water
outlet Cold water
inlet
Sewerage exit
Power cord
09
Note
Hot water outlet
Cold water inlet
Pressure relief valve
Pressure release hole
Joint screw for cold water inlet
Adjusting handle for
mixing valve
Hot water
Rubber seal gaskets
Rubber seal gaskets
Sewerage exit
Power cord

Methods of using
Operating Of The Unit
OPERATION INSTRUCTIONS
During normal operation, the inlet valve shall be always kept open.
First, open any one of the outlet valves at the outlet of the water heater, then, open the
inlet valve. The water heater gets filled with water. When water flows out of the outlet
pipe it implies that the heater has been filled fully with water, and the outlet valve can be
closed.
1.
If the “Power” indicator lights up, the thermostat will automatically control the tempera-
ture. When the water temperature inside the heater has reached the set temperature, it
will switch o automatically, when the water temperature falls below the set point the
heater will be turned on automatically to restore the heating.
2.
“Thermostat” knob, rotate the thermostat knob to set the temperature. Maximum set
temperature is 75 °C. Then the heating indicator light on.
“Power” indicator light, plug in the power, the power indicator light will light ON reserva-
tion.
“Heating indicator ” light, when the water is heated to the set temperature. The indicator
light is o, the water heater will be in a state of insulation.
1.
2.
3.
(Fig.6)
10
Note
1
2 3

CLEANING AND MAINTENANCE
1.
2.
3.
4.
Check the power plug and outlet as often as possible. Secure electrical contact and
also proper grounding must be provided. The plug and outlet must not heat exces-
sively.
If the heater is not used for a long time, especially in regions with low air tempera-
ture(below 0℃), it is nessary to drain water from the heater to prevent damage of the
water heater, due to water freezing in the internal tank.(Refer Cautions in this manual
for the method to drain away the water from the inner container).
To ensure long reliable water heater operation, it is recommended to regularly clean
the internal tank and remove deposits on the electric heating element of the water
heater, as well as check condition (fully decomposed or not) of the magnesium anode
and, if necessary, replace it with a new one in case of full decomposition.Tank cleaning
frequency depends on hardness of water located in this territory. Cleaning must be
performed by special maintenance services. You can ask the seller for address of the
nearest service center.
The water heater is equipped with a thermal switch, which cuts o power supply of
the heating element upon water overheating or its absence in the water heater. If the
water heater is connected to the mains, but water is not heated and the indicator
doesn’t light up, then the thermal switch was switched o or not switched on. To
reset the water heater to the operating condition, it is necessary to:
(1). De-energize the water heater, remove the plate of the side/lower cover.
(2). Press the button, located at the center of the thermal switch, see Fig.7;
(3). If the button is not pressed and there is no clicking, then you should wait until the
thermal switch cools down to the initial temperature.
Do cut o power supply before maintenance, to avoid danger like electric shock.
Non-professionals are not allowed to disassemble the thermal switch to reset.
Please contact prefessionals to maintain. Otherwise our company will not take
responsiblity if any quality accident happens because of this.
(Fig.7)
Manual reset button
11
Warning
Warning

12
Parts illustrated in this use and care manual are indicative only, parts provided with the
product may dier with illustrations.This product is intended for household use only.
Specifications are subject to change without notice.
TROUBLESHOOTING
Reasons TreatmentFailures
The heating
indicator
light is o.
Failures of the temperature
controller.
Contact with the professional
personnel for repair.
The running water supply
is cut o.
Wait for restoration of
running water supply.
Water leak.
No water coming
out of the hot
water outlet.
The hydraulic pressure is
too low.
Use the heater again when the
hydraulic pressure is increased.
The inlet valve of running
water is not open.
Open the inlet valve of
running water.
Failures of the temperature
control system.
Contact with the professional
personnel for repair.
Seal problem of the joint
of each pipe.
Seal up the joints.
The water
temperature
is too high.
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Note

logo, word marks, trade name, trade dress and all versions thereof are
valuable assets of Midea Group and/or its aliates (“Midea”), to which Midea owns
trademarks, copyrights and other intellectual property rights, and all goodwill derived
from using any part of an Midea trademark. Use of Midea trademark for commercial
purposes without the prior written consent of Midea may constitute trademark
infringement or unfair competition in violation of relevant laws.
This manual is created by Midea and Midea reserves all copyrights thereof. No entity or
individual may use, duplicate, modify, distribute in whole or in part this manual, or bundle
or sell with other products without the prior written consent of Midea.
All the described functions and instructions were up to date at the time of printing this
manual. However, the actual product may vary due to improved functions and designs.
TRADEMARKS, COPYRIGHTS
AND LEGAL STATEMENT
13
DISPOSAL AND RECYCLING
Important instructions for environment
Compliance with the WEEE Directive and Disposing of the Waster Product:
This product complies with EU WEEE Directive (2012/19/EU). This product bears a
classification symbol for waster electrical and electronic equipment (WEEE).
This symbol indicates that this product shall not be disposed
with other household wastes at the end of its service life. Used
device must be returned to ocial collection point for
recycling of electrical electronic devices. To find these
collection systems please contact to your local authorities or
retailer where the product was purchased. Each household
performs important role in recovering and recycling of old
appliance. Appropriate disposal of used appliance helps
prevent potential negative consequences for the environment
and human health.
Compliance with RoHS Directive
The product you have purchased complies with EU RoHS Directive (2011/65/EU). It does
not contain harmful and prohibited materials specified in the Directive.

DATA PROTECTION NOTICE
For the provision of the services agreed with the customer,
we agree to comply without restriction with all stipulations of applicable data protection
law, in line with agreed countries within which services to the customer will be delivered,
as well as, where applicable, the EU General Data Protection Regulation (GDPR).
Generally, our data processing is to fulfil our obligation under contract with you and for
product safety reasons, to safeguard your rights in connection with warranty and
product registration questions. In some cases, but only if appropriate data protection is
ensured, personal data might be transferred to recipients located outside of the
European Economic Area.
Further information are provided on request. You can contact our Data Protection
Ocer via [email protected]. To exercise your rights such as right to object your
personal date being processed for direct marketing purposes, please contact us via
[email protected]. To find further information, please follow the QR Code.
14
Package information
Packaging materials of the product are manufactured from
recyclable materials in accordance with our National Environment
Regulations. Do not dispose of the packaging materials together
with the domestic or other wastes. Take them to the packaging
material collection points designated by the local authorities.

2023