Midea MSH-50VH User manual

Storage Electric Water Heater

Instruction Manual

For Model: MSH-30VH
MSH-50VH

The diagram above is just for reference. Please take the

appearance of the actual product as the standard.

Thank you very much for purchasing our water heater.
Before installing and operating your water heater, please
read this manual carefully and keep it for future reference.

General Remark

●

The installation and maintenance has to be carried out by qualified professials or
Midea authorized technicians.

●

The manufacturer shall not be held responsible for any damage or malfunction caused by
wrong installation or failing to comply with following instructions included in this pamphlet.

●

For more detailed installation and maintenance guidelines, please refer to below chapters.

TABLE OF CONTENTS

TITLE PAGE

1.Cautions ...........................................................................................................................(2)

2.Product introduction .........................................................................................................(3)

3.Unit installation .................................................................................................................(6)

4.Methods of using ..............................................................................................................(8)

5.Maintenance.....................................................................................................................(9)

6.Troubleshooting................................................................................................................(10)

1

1. CAUTIONS

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 10A. The socket and plug shall be kept dry to prevent electrical leakage. Inspect
frequently whether the plugs contact well with the socket. Inspect method is as follows: insert
the power supply plug into socket, after using for half an hour, shut down the unit and pull the
plug out, and inspect the plug whether it scalds hand. If it scalds (over 50℃), please change
another well-contacted socket to avoid the plug being damaged, fire or other personnel
accidents result from bad-contacting.

●

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.

Pressure relief valve

Cold water

Hot water

Pressure release hole

2

Pressure relief valve

Thread screw

Drain handle

Cold water

Hot water

(Fig.1)

●

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
multifunction valves. 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.

●

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.

●

Unscrew the thread screw on the multifunction safety valve, and lift the drain handle upwards.
(See Fig.1) to drain the water from the inner tank.

●

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.

3

2.2 Technical Performance Parameters

Model

MSH-30VH
MSH-50VH

2.3 Brief introduction of product structure

Volume

(L)

30
50

Rated
Power

(W)
1500
1500

Rated

Voltage

(ACV)
220-240
220-240

Rated

Pressure

(MPa)

0.75

0.75

A

Heating element

B

Cold water inlet

ON/OFF

Power indicator light

C

Hot water outlet

Temperature adjusting knob

Heating indicator light

Max Of Water

Temperature

(℃)

75
75

Shell

Thermometer

Inner tank

Thermal insulation

Anode rod

Protection

Class

I
I

E

Water
Proof
Class

IPX4
IPX4

PRODUCT STRUCTURE FOR VERTICAL

B

A

PRODUCT STRUCTURE FOR HORIZONTAL

C

D

4

MSH-30VH
A

B
C
D
E 196

340

593
262
193

(Note:All dimensions are in mm)

NOTE

D

represents

wall-mounted distance between holes of vertical.

2.4 Internal Wire Diagram

the wall-mounted distance between holes of horizontal, E

MSH-50VH

385

711
296
310
196

represents

the

Thermal
Cut Out

L

N

E

Thermostat

Power Indicator Light

ON/OFF

Heating Element

Heating Indicator Light

WIRING DIAGRAM FOR MSH-*VH

5

3. UNIT INSTALLATION

3.1 Installation Instruction

This electrical water heater shall be installed on a solid wall. If the strength of the wall cannot

①

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

②

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).

Expansion bolt
(with hook)

(Fig.2)

Install the supply socket in the wall. The requirements for the socket are as follows:250V/10A,

③

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.

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.
Incorporate 10 mA RCD in the installation circuit.

⑤

3.2 Pipelines Connection

The dimension of each pipe part is G1/2” ; The massive pressure of inlet should use Pa as

①

the unit; The minimum pressure of inlet should use Pa as the unit.

②

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

③

with the heater must be added at the end of the threads to ensure leak proof joints (see Fig.4).

Cold water inlet

Pressure relief valve

Pressure release hole

Cold water

PRODUCT STRUCTURE FOR VERTICAL

Hot water

Hot water outlet

6

(Fig.3)

Hot water outlet

Cold water inlet

Pressure relief valve

Pressure release hole

Hot waterCold water

PRODUCT STRUCTURE FOR HORIZONTAL (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.

Pressure relief valve

Water inlet valve

Shower nozzle

Water inlet valve

Cold
water
inlet

Adjusting handle for
mixing valve

Hot water
outlet

Triple joint

Water pool

Running water pipe Mixing valve

NOTE

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 off 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.

7

(Fig.5)