Storage Electric Water Heater Instruction Manual

General Remark

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

1. Cautions

[Warning] 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.
• 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.

[Note] When using the heater for the first time (or the first use after maintenance), the heater cannot 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 the 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°C, 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 professional maintenance personnel.

[Warning] If any parts and components of this electrical water heater are damaged, please contact the 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 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 off, and lift the drain handle upwards.

[Figure 2] Diagram depicting installation zones around a bathtub or shower, indicating that installation in zones 0 and 1 is strictly prohibited.

[Strictly Prohibited] All circuits in premises containing bathtubs or showers shall be protected with one or more RCDs with a rated triggering current of up to 30 mA.

2. Product Introduction

2.1 Nomenclature

D - is the product code of the storage electric water heater;

* - is the capacity (L);

*** - represents the rated power (*100W);

FG - represents the pattern code (eg : A,B,C...);

1 - represents the extension of pattern (eg : 1,2,3...).

[Note] This manual is applicable to the storage electric water heaters (D *-***) manufactured by Midea.

2.2 Technical Performance Parameters

2.3 Brief introduction of product structure

The following table provides dimensions for different models:

(Note: All dimensions are in mm)

2.4 Internal Wire Diagram

The internal wiring diagram includes the following components: Thermal Cut Out, Thermostat, Heating indicator light, and Heating Element. The connections are: Brown wire for Line (L), Blue wire for Neutral (N), and Yellow/Green wire for Earth (E).

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 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. In case of a hollow brick 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 (200mm). 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 electrical water heater on it.

When the second hanging plate is used for installation, it is preferred to install in the hole (Dimension: D1). If it is installed in the lower part (dotted line position), it is necessary to confirm whether it is firm after completion (Dimension: D2).

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 place the socket on the right above the heater. The height of the socket to the ground shall not be less than 1.8m.

If the bathroom is too small, the heater can be installed at another place. However, in order to reduce the pipeline heat losses, the installation position of the heater shall be as near as possible to the point of use.

3.2 Pipelines Connection

The dimension of each pipe part is G1/2". Connection of the 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.

If the users want to realize a multi-way supply system, refer to the method shown in Figure 6 for connection of the pipelines.

[Note] Please be sure to use the accessories provided by Midea to install this electric water heater. This electric water heater cannot 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 be convenient for maintenance of the heater, if necessary.

4. Methods of Using

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.

[Note] During normal operation, the inlet valve shall be always kept open.

Insert the supply plug into the supply socket; the indicator will light up this time.

The thermostat will automatically control the temperature. When the water temperature inside the heater has reached the set temperature, it will switch off automatically. When the water temperature falls below the set point, the heater will be turned on automatically to restore the heating.

Temperature knob: Turn the knob to adjust the temperature. The temperature increases when turning right and decreases when turning left.

Heating indicator: When the product is heated, the lamp is on, and when the heating is completed, the lamp is off.

When the knob indicates Eco, the product temperature is set to about 55 °C.

When the knob is turned to the icon, the product is set to 80 °C, and more hot water can appear.

5. Maintenance

[Warning] Before doing any maintenance, please cut off the power supply.

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 excessively. If the heater is not used for a long time, especially in regions with low air temperature (below 0 °C), it is necessary to drain water from the heater to prevent damage of the water heater due to water freezing in the internal tank. (Refer to 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 the 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 the hardness of water in the territory. Cleaning must be performed by special maintenance services. You can ask the seller for the address of the nearest service center.

The water heater is equipped with a thermal switch, which cuts off power supply to 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 off 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.
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.

[Warning] Non-professionals are not allowed to disassemble the thermal switch to reset. Please contact professionals to maintain. Otherwise, Midea will not take responsibility if any quality accident happens because of this.

6. Troubleshooting

[Note] Parts illustrated in this use and care manual are indicative only; parts provided with the product may differ from illustrations. This product is intended for household use only. Specifications are subject to change without notice.