Installation and User Manual - [PDF Document] (2023)

Microsoft Word -171002_MI-MU_MIDEA_AEROTERMIA_COMBO-RSJ-35300RDN3-F1-ES.docInstallation and User Manual
All-in-one air source heat pump water heater
RSJ-35/300RDN3-F1
Thank you very much for buying our product. Before using your unit, please read this manual carefully and keep it for future reference.
WARNING Before using the unit, it is imperative that it be properly grounded before use. Failure to do so could cause serious injury.
Do not install the unit if you cannot confirm that your household electrical network is properly grounded. Make sure that a qualified technician performs the grounding and installation of the unit.
Some examples of qualified technicians are: licensed plumbers, authorized power company personnel, and authorized service personnel.
Your safety is our primary concern
COMPONENT NAMES
Compressor Junction Box Cover Front Cover
Display
PT-valve
Front trim plate (Basic) Anode rod
Water outlet Cover
Front trim plate (Optional II) TCO
ATCO Cover (Electric Heater) Solar Sensor
(None on some models) (No solar heated water on some entry models)
Electric heater
Water inlet Solar heated water outlet (None on some models)
Drain pipe
USE:
All images in this manual are provided for explanatory purposes. It may vary slightly from the heat pump water heater you have purchased (depending on the model). Please refer to the actual sample rather than the images in this manual.
PAGE CONTENTS
MAINTENANCE................................................. ............................................17
SPECIFICATIONS................................................. ................................................18
Fig.0-1
USE:
The above calculations are based on ideal conditions, the final invoice cost will be different due to actual operating conditions, such as operating period, ambient temperature, etc.
1. SAFETY INFORMATION
Read all instructions carefully before installing or using the unit. It is important that you observe and follow the indications of all safety symbols: 0. BASIC PRINCIPLE OF
OPERATION You could be injured if you do not follow the instructions. CAUTION From our experience, we know that the natural flow of heat is
from a larger heat source to a smaller one. That is why the heat pump can transfer heat from a low to a high temperature source with great efficiency.
You could be seriously injured or killed if you do not follow instructions. WARNING
The advantage of a heat pump water heater is that it can provide more heat energy, normally 3 times greater than the input electrical power, extracting heat from the environment to domestic hot water without additional cost. Compared to a traditional water heater Like electric or gas, the pump heater usually has an efficiency of less than 1, so families can greatly reduce their DHW using this type of heater. The following data will offer more details.
You could be seriously injured or killed immediately if you do not follow instructions. DANGER
WARNING
The unit must be properly grounded.
A leakage breaker should be installed next to the power supply.
Comparison of energy consumption under the same conditions to heat 1 ton of water at 15C until it reaches 55C
Do not remove, cover, or peel any permanent instructions, tags, or data labels from the exterior of the unit or the interior panels of the unit.
Equivalent heat load Q=CM(T1-T2)=1(Kcal/Kg*)X1000 (Kg)*(55-15 =40,000 Kcal=46.67 KW*h
Table 0-1 Make sure that only qualified technicians perform the installation in accordance with the regulations of the country and with this manual. Improper installation may result in water leakage, electric shock and fire.
HPWH Gas burner
Energy Resource Air, electricity Electricity
Transfer factor 860 Kcal/KW*h 24,000 Kcal/m 860 Kcal/KW*h Make sure that only qualified technicians carry out relocation, repair and maintenance of the unit, instead of doing it yourself. Improper installation may result in water leakage, electric shock, and fire.
Medium Efficiency
(W/W) 3,5 0,8 0,95
Electrical connection work must comply with the regulations of the local supply company, the local electrical network and this manual.
Consumo 13,33 KW*h 2,08 m3 49,13 KW*h
Never use cables or fuses with the wrong rating, the unit could be damaged and cause a fire. Unit cost $0.09/KW*h $2.84/m $0.09/KW*h
Do not insert fingers, rods, or other objects into the air inlet or power outlet. The fan can cause injury when it rotates at high speed.
running cost
USD 1,2 5,9 4,42
Do not use flammable sprays such as hair products, hairspray near the unit. It could cause a fire.
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1
HPWH
The application is not intended for use by persons (including children) with reduced physical, sensory and mental capabilities, or lack of experience or knowledge, unless they have been given supervision or guidance on the use of the unit by a responsible person. for your safety. Children should be supervised to ensure that they do not play with the device.
Do not turn off the power. The system will stop or restart heating automatically. One of the power supply is necessary to heat the water, except maintenance and repair. If the unit has not been used for a long period (2 weeks or more), hydrogen gas will be generated in the water pipe system.
Gaseous hydrogen is extremely flammable. To reduce the risk of injury under these conditions, it is recommended that the kitchen hot water faucet be turned on for several minutes before using any electrical device connected to the hot water system. When hydrogen is present, there is likely to be a strange sound, like air escaping through a pipe, as the water begins to flow. There should be no smoke or flames near the tap when you open it.
If the power cord is damaged, it must be replaced by the manufacturer, service agent, or other similarly qualified person.
DISPOSAL Do not dispose of this product as unsorted municipal waste. It is necessary to collect such waste of said waste for its special treatment. Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities. Contact your local authorities for more information regarding available collection systems. 2. BEFORE INSTALLATION If electrical devices are disposed of in landfills, hazardous substances can leach into ground water and enter the food chain, harming your health and well-being.
2.1 Unpacking 2.1.1 Accessories
1
1
End The plug ground must be properly grounded. Make sure the power plug and connector are sufficiently dry and connected firmly.
User and Installation Manual
one way valve 1
1
How can you check that the socket and plug are valid? Turn on the power and keep the unit running for half an hour, then turn off the power and remove the plug. Check if the plug and connector are hot.
Drain pipe for water condensation
Discharge condensed water
Before proceeding with cleaning, make sure that the equipment is not in operation and that the switch or disconnect the power cord. Failure to do so could result in bodily injury or electric shock.
2.1.2 Method of transport
Water hotter than 50 can cause instant severe burns or serious scalding injuries. Children, disabled people, and the elderly are most at risk of scalding. Check the water before bathing or showering. It is recommended to use water temperature limiting valves.
1) To avoid scratches or deformation of the surface of the unit, please put protection boards on the contact surface. Do not touch the blades with your fingers or other objects. Do not tilt the unit more than 75° during transportation and keep it upright for installation.
>75°
Grade limit > 75°
2) The unit is very heavy, so it is recommended to transport it between two or more people. Failure to do so could result in injury and damage.
Do not handle the unit with wet hands. An electric shock could occur.
2.2 Location requirements The installation height of power supply should be more than 1.8m, if there is splashing water, please separate the power supply from the water.
1) Sufficient space must be left for installation and maintenance.
2) The air inlet and outlet must not have obstacles or air currents.
It is necessary to install a one-way valve on the water inlet side, available among the accessories, see "accessories" in the manual, unnecessary part. 3) The base surface must be flat, it must not be inclined
more than 2° and must be able to support the weight of the unit and be suitable for installing the unit without causing noise or vibration.
It is normal for a few drops to fall out of the PT valve hole during operation. However, if there is a large amount of water, call your maintenance agent for instructions.
4) Noise from operation and released airflow should not affect neighbors. After prolonged use, check the base of the unit and the
accessories. If they are damaged, the unit could sink and cause injury. 5) There are no flammable gas leaks in the vicinity.
6) It is comfortable for pipes and wiring. Lay the drain pipe so that drainage is smooth. Inadequate drainage can cause humidity in the building, furniture, etc. 7) If installed indoors, it may cause the temperature to
internal noise. Take the necessary measures to avoid this. Do not touch the internal components of the controller. Do not remove the front panel. Some parts inside are dangerous to touch, it may cause a breakdown of the machine.
8) If it is necessary to install the unit on a metal area of ​​the building, check that the electrical insulation is correct and that it complies with the applicable electrical regulations.
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CAUTION
The ambient air temperature must also be considered when installing this unit; In heat pump mode, the room temperature should be above -7ºC and below 43ºC If the room temperature is out of these upper and lower limits, the electrical elements will be activated to meet the hot water demand and the heat pump will stop working. .
800
600 600 The unit should be located in an area protected from freezing temperatures. temperatures. If the unit is installed in unconditioned locations (i.e. garages, basements, etc.) it may be necessary to insulate the water, condensate and drain pipes to protect against freezing.
CAUTION
If the unit is installed in any of the following spaces, it may cause a malfunction (if unavoidable, consult the supplier).
Places with mineral oils, such as cutting oils in machines. Fig.2-2
2.4 Installation in closed places In coastal areas where the air contains a lot of salt.
Places with hot springs with corrosive gases. For example, sulfur.
Factories where the supply voltage fluctuates significantly.
Inside a vehicle or cabin.
The water heater must be located in a place of more than 15m3, and must have unrestricted airflow. As an example, a room 2.5 meters high, 3 meters long and 2 meters wide is 15 m3.
2.5 Unit dimensions (unit: mm) Places with direct sunlight or other heat sources. If it is not possible to avoid it, install some type of cover.
Places such as kitchens with the presence of oils.
Places where there are strong electromagnetic waves.
Places where there are flammable materials or gases.
Places with evaporation of acids or bases.
Other special environments.
WARNING
If the unit is not fixed correctly, there will be noise and shaking.
Check that there are no obstacles around the unit.
In places with strong winds, such as near the sea, fix the unit so that it is protected from the wind.
2.3 Space requirements for maintenance (unit: mm)
Air outlet outlet 650 Fig.2-3
600 600 600 Barrier Φ 650
air outlet inlet
Display 650 Fig.2-4 Fig.2-1
3
3. INSTALLATION The air flowing through the units should be greater than 350 m/h. Make sure there is enough space for the installation.
Schematic dimension drawing (see Fig.2-3,Fig.2-4).
3.1 Water piping system User
Upper condensation outlet
Bottom Condensation outlet
Notice:
The faucet mixer is necessary in the hot water use terminal Anode rod
Solar sensor Solar heated water inlet Solar heated water outlet
One-way valve Tap water
Installation of the
Drainage drum Fig.3-1
Water inlet or outlet pipes: The thread specification of the water inlet or outlet is RC3/4” (external thread). The pipes must be well insulated from heat.
2) One-way valve installation: The thread specification on the one-way valve in accessories is RC3/4”. It is used to prevent water from flowing in the opposite direction.
1) Pipe installation for PT valve: The connection thread specification of the valve is RC3/4” (internal thread). After installation, it should be confirmed that the drain pipe outlet is open to air.
3) After installing the hydraulic system piping, open the cold water inlet valve and hot water outlet valve, and start to empty the tank. When the water comes out fluently through the water outlet pipe (tap water outlet), the tank will be full. Close all valves and check the lines to make sure there are no leaks.CAUTION
4) If the inlet water pressure is less than 0.15 MPa, a pump should be installed at the water inlet. To ensure the safe use of the tank if the water pressure is higher than 0.65 MPa, a reducing valve should be in the water inlet pipe.
Water pipe system according to the previous figure. In case of installation in a place where the outside temperature is below the freezing point, it is necessary to insulate all the hydraulic components.
The PT valve handle should be removed twice a year to check for a stuck valve. Take care not to burn yourself, be careful with hot water from the valve.
5) If the drain pipe is blocked, the unit may leak due to condensation, so it is recommended to use a drain tank as shown in the following figure:
Mania
The drainage pipe must be well insulated to prevent the water inside it from freezing in cold weather.
pipe drain
WARNING
Do not disassemble the PT valve. 50 mm greater than dia. of unity
Do not block the drain pipe. Injury or explosion may result if the above instructions are not followed. Fig.3-2
BURST
4
3. 2 Air duct connection
1) Ducted air inlet and outlet. (A+B+C+D≤10m) 3) Air outlet connected to the canvas, air inlet without duct (B+C≤10m).
Fig.3-5 Fig.3-3
It is recommended to install the unit in this way in summer so that fresh air can enter the room.
2) Air outlet without canvas, air inlet to the duct (A+D≤10m).4) Description of the duct
Tabla 3-1
conduit conduit
Dimensions (mm)
Φ190 190X190
≤2 Look at previous data
Total duct length (m) ≤10 ≤10
Pressure drop with elbows (Pa) ≤2
≤3
≤2
≤3 Fig.3-4
Amount of curvature It is recommended to install the unit in this way in winter
where there is another source of heat in the room.
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Air inlet Air outlet Air outlet Air inlet
Air outlet Air inlet
5) Installation of the filter at the entrance of the unit. Regarding the unit with duct, the inlet filter must be placed at the inlet of the duct. (Fig.3-8/3-9)
USE:
output input Filter
Duct resistance will reduce airflow and will also reduce the capacity of the unit.
For units with canvas: the total length of the duct should not be more than 10 m, or the maximum static pressure should be around 25 Pa, and there should be no more than 3 bends.
In units with duct in the air outlet, when the unit is running, condensate will be generated around the duct. Please carry out drainage work carefully. We suggest that you cover the outside of the duct with thermal insulation.
We recommend installing the unit indoors. It is not allowed to install the unit in an area where it will rain and it is unprotected.
Fig.3-8 ΦD
Rain Filter
The owner should install the filter by himself, and the mesh size is about 1.2mm.
main unit
Fig.3-9 Fig.3-6
6) To remove condensation from the unit smoothly, please install the main unit on a horizontal surface. If this is not possible, make sure the drain vent is set to the lowest level. We recommend that the angle of inclination of the unit with respect to the ground is not greater than 2º.
Rain
Sewer system
Fig.3-7
WARNING
If rain were to enter the internal components of the unit, the components could be damaged or cause physical hazards (Fig. 3-6)
Sewer system
As for the units that are connected to the duct that leads to the outside, the necessary measures must be taken to achieve the impermeability of the duct, and prevent water from falling on the internal part of the unit. (Fig. 3-7)
Fig.3-10
6
3.3 Electrical connection 3.3.2 Power supply specifications Table 3-2
CAUTION
The power source must be an independent circuit with rated voltage.
The power supply circuit must be properly grounded. Wiring must be done by a professional technician according to the national wiring regulations and this circuit diagram. An all pole disconnect device, having at least a 3mm separation distance in all poles, and a residual current device (RCD), with an intensity greater than 10mA, must be incorporated into the fixed wiring according to national regulations.
leakage breaker
Select the power cord according to the table above and in compliance with local electrical regulations.
Set the electric leakage protector according to the electrical technical standards of the country's standard electrical regulations. Model of electrical cable, the recommended mode of cable
electrical is H05RN-F. The power cable and signal cable should be laid neatly and properly without interfering with each other or touching the connection pipe or valve. WARNING After connecting cables, check again to make sure they are correct before turning them on.
The unit must be installed with a leakage breaker next to the power supply and must be properly grounded.
3.3.1 Illustration of electrical wiring
PRO-H TP TH T4 T3 T5U T5L Item Contents Fan capacity
Model selection (user can never alter factory settings)
Model selection (user can never alter factory settings)
Terminal base Transformer
Zero Phase Electricity Mutual Inductor
Cylinder head plug Cylinder head plug
Relay connection cables Relay
temperature protection switch
Without electric heater With electric heater White Without disinfection With disinfection Black
Yellow
CN5 CN16 CN18 CN24 CN19 CN20 CN40 CN27
CN28 Power frequency: 60 Hz Power frequency: 50 Hz
Model 300L Model 190L
room temperature sensor
CN6 LCD T4
T5L
Suction temperature sensor
High pressure protection switch:
Contactor AC TH CN26
CN2
PRO-H If customer needs to install coils for solar energy, terminal CN26 should be connected to 220~240V power supply. CN2 provides control signal for solar energy water pump, and AC contactor should control solar energy pump. as the CN2 terminal should not drive the water pump directly. Contact the technical department of your supplier for information on the method to follow in the electrical connections.
CN1
KM1 EU
KM2 COMP Compressor
Capacitance Wires L and N, passing through the mutual zero phase current inductance should keep the same direction when winding. Otherwise, the system will have malfunctions.
Azul
Rojo
Blue Yellow/green Yellow/green
Blue Compressor Fan Capacity
Black Red Red
Electrical diagram of the components inside the tank 1A-1C 1FThe cable comes out of the tank and must be connected to the corresponding component. Power supply
Fig.3-11 T3: Temp. evaporador Sensor
T4: Temp. Ambient TP Sensor: Temp. Discharge Sensor
T5U: Temp. Sensor tank (upper) TH: Temp. aspirationSensor
Ground connection
7
Model name RSJ-35/300RDN3-F1 Power supply220-240V50Hz Mlin. Power cable diameter (mm2)
4
40/30
3.3.3 Description of PCB I/O ports
Supply Fan COMP EHEAT S.V. Heater Valve Heating Valve
Bomba solar (300L)
Transformer Input SW1 Factory setting for disinfection Electric heater model selection Solar input (300L)
SW2 Factory setting for 190L/300L model and selection of 50/60 Hz for power frequency
High Pressure Switch
Transformer Display panel Output of the T5L:Sensor temp.T5U:Sensor temp. T3: Temp sensor T4:Sensor temp Th:Sensor temp.screen water tank water tank room outlet from upper lower panel suction evaporator
Tp:Sensor temp. Discharge Output Supply Compressor Compressor Output
Fig.3-12
3.3.4 Switch settings
On the PCB there are 2 groups of switches. 3.3.5 Electric Leakage Protector Table 3-4
Model selection (user can never alter factory settings) SW1
ON OFF Leakage protector / SW1~1 Without electric heater With electric heater 1
GND SW1~2 Without disinfection With disinfection
Power cord
Tabla 3-5
Model selection (user can never alter factory settings) SW2 Fig.3-13
ON OFF SW2~1 SW2~2
Model 300L Model 190L
Power frequency: 60Hz Power frequency: 50Hz
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3.4 Installation Checklist 3.4.4 Electrical Connections
3.4.1 Location The water heater requires 230 VAC to function properly.
The flooring under the water heater must be able to support the weight of the heater when it is filled with water (> 445kg).
Wiring size and connections meet all applicable local codes and the requirements of this manual.
Indoors (such as basements or garages) and in an upright position. Protect from freezing temperatures. Water heater and electrical supply correctly
grounded. Protection by correctly installed circuit breaker or overload fuse.
3.4.5. Post Installation Review
Necessary measures to protect the area from water damage. Metal drain pan installed and connected to a suitable drain.
Sufficient space to carry out maintenance on the water heater. Understand how to use the interface module of the
user to adjust the various modes and functions. Sufficient air for the heat pump to operate, the water heater must be located in a space >15 m³ and must have unrestricted airflow.
Understand the importance of routine inspections and maintenance on condensation drain lines and tanks. This is useful to prevent any blockage in the drain line from condensation overflowing into the drain pan. NOTE: IMPORTANT: Water coming from the plastic cover is an indication that both condensate drain lines may be blocked. You should take action immediately.
To maintain an optimal level of efficiency and maintenance, it is necessary to maintain the following distances: 800 mm on the air inlet side, 800 mm on the air outlet side, 600 mm at the rear and 600 mm at the front. To maintain optimum performance, inspect,
remove and clean the air filter. The unit cannot be placed in any type of cabinet or small enclosure.
4. OPERATION TEST The site must be free of corrosive elements in the atmosphere such as sulfur, fluorine and chlorine. These elements are found in aerosols, detergents, bleaches, cleaning solvents, air fresheners, paint and varnish removers, refrigerants and many other household products. .In addition, an excessive amount of dust and lint can affect the unit's performance and require more frequent cleaning.
4.1 Water inlet before operation
Before using this unit, please follow the steps below.
Water inlet: If the unit is used for the first time or used again after emptying the tank, check that the tank is completely filled with water before turning on the power. The ambient temperature should be above -7 ºC
and below 43 ºC. If the ambient air temperature is not within these limits, the electrical elements will activate to meet the hot water demand.
Method: see Fig. 4-1
3.4.2 Water piping system Open the cold water inlet valve and hot water outlet valve. water outlet valve.
The PTR valve (pressure and temperature reducing valve) is properly installed with a discharge line to a suitable drain and protected from freezing.
open open
Unit completely filled with water.
A mixing valve (recommended) has been installed in accordance with the manufacturer's instructions. Instructions.
Cold water inlet Hot water outlet
Water inlet 3.4.3 Installation of the condensate drain line
It should be located in a place where you have access to a suitable drain or a condensate pump. When the water passes through the water outlet, the
tank is full. Close the hot water outlet valve and the water inlet will be finished. Condensate drain lines are installed and
piped to a suitable drain or condensate pump.
Closing
9
CAUTION Water outlet
Operation without water in the tank can cause damage to the auxiliary heater. The manufacturer assumes no responsibility for damage caused by this problem.
Tank temperature sensor
Electric heater
Temperature sensor After turning on the power, the display lights up. Users can operate the unit by the buttons under the screen.
Water inlet Emptying: If the unit needs to be cleaned, moved, etc., the tank must be emptied. Method: See Fig. 4-2:
Fig.4-3 Close the cold water inlet valve, open the hot water outlet valve, and open the drain pipe.
2)
3)
Water temperature display The temperature displayed on the display depends on the upper sensor. Therefore, it is normal that the display temperature has reached the desired temperature, but the compressor is still running, because the lower water temperature does not reach the desired temperature.
Open
Closing
Hot water outlet The heat source will be selected automatically per unit. However, heater E is manually available.
Open Operating temperature range Water temperature adjustment range: 38~65ºC. Ambient temperature range for resistance operation: -20~43ºC. Ambient temperature range for heat pump operation: -7~43ºC. Water temperature limits:
Cold water inlet Drain pipe stop valve
Drain Table 4-1
After emptying, replace the drain pipe nut.
Model RSJ-35/300RDN3-F1
Ambient Temp. (T4) T4 -7 -7≤T4 -2 -2≤T4 2 2≤T4 7 7≤T4 43T4≥43
-- Closing
65
47
65
55
65
65
65 65 Drain line stop valve
Fig.4-2 Model
4.2.1 Checklist before commissioning
1) Checklist before test run. 2) Correct installation of the system. 3) Correct connection of water/air pipes and cables.
4) Change of heat source
4) Stable condensate drainage, good insulation of all hydraulic components.
§ The default heat source is the heat pump. If the room temperature is outside the range for the heat pump, the pump will stop, the unit will activate the heater automatically and show the LA icon ( ) on the screen. Then, if the room temperature returns to the operating range of the heat pump, the resistance will turn off and the unit will automatically return to heat pump. The LA icon ( ) will turn off. § If the target-set temperature is higher than the
maximum temperature (heat pump), the unit will activate the heat pump firstly at the maximum temperature, then stop the heat pump, activate the heater E to heat the water to the desired temperature.
§ If the resistance operation mode is manually activated with the pump running, the resistance and the heat pump will work at the same time until the water temperature reaches the target. So, if fast heating is needed, the resistance must be activated manually.
5) Adequate nutrition. 6) There should be no air in the water pipe or any of the
open valves. 7) The equipment must be protected from electrical leakage.
Sufficient pressure in the inlet water (between 0.15 MPa and 0.65Mpa). (≥0.15MPa)
8)
4.2.2 About operation
1) System structure diagram The unit has two types of heat sources: Heat pump (compressor) and electric heater. The unit automatically selects the source to heat the water to the set temperature.
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USE:
§ The electric resistance will be activated once during the current heating process, if you want to apply the electric resistance again, press
§ If only one E heater is used, only around 150 liters will be heated, so a higher target water temperature should be set if the room temperature is outside the heat pump's operating range.
USE:
With an ambient temperature below -7ºC, the heat pump will see its efficiency drastically reduced, the unit will automatically switch to resistance mode.
4.2.3 Basic function
1) Weekly disinfection function In disinfection mode, the unit will immediately start heating water up to 65ºC to kill Legionella bacteria that might be in the tank. The icon will light up on the screen during disinfection. The unit will exit the disinfection mode when the temperature exceeds 65ºC, and the icon will turn off.
2)
3)
Vacation mode: After pressing the “Vacation” button, the unit will automatically heat the water to 15ºC in order to save energy during vacation days.
§ Defrost during water heating In the period of heat pump operation, if the evaporator has been frosted by the lowest low ambient temperature, the system will enter defrost automatically to maintain efficient performance (about 3~10 min). During defrost, the fan motor stops, but the compressor continues to run.
§ COP There are different COPs for different ambient temperatures. Normally, the lower ambient temperature results in a longer warm-up time, as it is less efficient performance.
§ When the room temperature is lower than 7ºC, the heat pump and electric resistance will be used in different proportion of heating capacity, in general, the lower the room temperature, the lower part of the heat pump will be the used proportion of the electric resistance. For more details, see Table 4-1 and 4-2.
§ About TCO and ATCO The resistor will be turned on or off automatically through TCO and ATCO.
§ If the water temperature is too high. If the temperature is greater than 78 ºC, the ATCO will automatically turn off the resistance and turn it on if the temperature drops below 68 ºC. If the temperature exceeds 85ºC, the TCO will automatically turn off the resistance, which will have to be turned on again manually.
§ Restarting after a long shutdown period § When the unit restarts after a long period of inactivity
(run test run test), it is normal if the outgoing water is not completely clean. Leave the faucet running and clean water will flow right away.
Unit working mode: If unit is OFF->press ->unit will turn ON->press ON/OFF
to set the desired water temperature (38-65ºC) ->press->the unit will select the mode automatically and start heating water to reach temperature.
4.2.4 Query function
For correct maintenance and debugging, the query function is available by pressing 2 buttons together: “ + + . Then, the system operation parameters will be displayed one by one in the following sequence for each press of “ “ or “ “ button.
Tabla 4-3
1
2
Temperature
Temperature
Temperature
Temperature
Temperature
Temperature
Current
T5U
T5L
First previous error or protection code
9
11 Software number
11
Fig.4-5
Fig.4-6
Electric heater: it will be lit if the electric heater is activated, otherwise it will be off. If the unit automatically activates the electrical resistance, it will be illuminated;
5.1 Description of the control panel
If the electrical resistance is activated manually, it will blink at 0.5Hz frequency. When manually activating/deactivating the electric heater, it will flash at 2 Hz frequency.
Sanitize: SET SET CLOCK DAY will be illuminated when the unit is in
disinfection mode, otherwise it will be off. it will be illuminated if the disinfection mode is activated automatically from the unit;
1 2
ON ON ON Inválido OFF OFF OFF
it will flash at 0.5Hz frequency if disinfection mode is activated manually;
TIMER CLOCK
will flash at 2 Hz frequency with setting in disinfection mode or setting of disinfection timer. Operation
high temp. Alarm ENTER Press 3 seconds to lock/unlock
VACATION
DISINFECT
CANCEL If the temp. of water is higher than 50 it will be on, otherwise it will be off.

ON/OFF Alarm: When the unit is under protection/error, it flashes with a frequency of 5Hz and the buzzer sounds 3 times per minute until the protection/error is removed or pressed for 1 second.

Fig.5-1
Lock: If the button is locked, it will light up, otherwise it will be off.
5.2 Screen description
Temperature unit If you set Celsius degree as the temperature unit, it will light up, and display Celsius degree; If the set temperature unit is Fahrenheit, degrees Fahrenheit will be displayed.

Invalid ON ON ON Invalid OFF OFF OFF

Fig.5-2 :
will light up if the screen is unlocked. Displays the water temperature in normal mode; Displays the remaining vacation days in vacation mode;
Tabla 5-1
No Icon Description
Wired controller: If a wired controller has been connected, it will be illuminated; otherwise, it will be off.
Displays the set temperature under the set mode; vacation; Displays the unit's operating parameters/settings, protection/error code in query mode.

External solar heat source: If there is an external solar heat source connected to the unit, it will flash at 0.5Hz frequency, otherwise it will be off.
Reserved

Vacation mode: Water temperature adjustment will be illuminated when you adjust the water temperature or vacation days.
It will light up if the unit is in “Vacation” mode. Otherwise, it will turn off; will flash at 2 Hz frequency with setting to vacation mode.
14,1
date setting
Compressor: it will be on when the compressor is running, otherwise it will be off
it will be lit when you set vacation days; It will turn on if the unit is in “Vacation” mode.
14,2
12
No Icon Description No Icon Description
Timer Setting the clock There are six timers that can be set.
If there is one set, the corresponding one will light up when the screen is unlocked. If none of the timers have been set, it will remain off. If a timer is being set, the one corresponding to the 2Hz frequency will flash and the timer that has been set will light up.
Press the clock set button. Then the icon will light up and the clock time value will flash slowly.
for 3 s to enter the

Set the value of the clock time. 3.1
Confirm the time setting. Then the minute value of the clock will flash slowly.
Clock and clock setting displays the clock.
Whenever there is any clock adjustment, it will be lit. Set the value of the clock minutes.
Confirm the minute setting and exit the clock setting.
define the timer
Select the timer ( ) that you need to set. The timer icon will flash slowly if selected.

Confirm the selected timer setting. Then it will light up. Then the timer hour value will flash slowly.
Fig.5-3
The key function is only effective if the screen and buttons are unlocked. Table 5-2
Set the time value of the timer. No. Icon Description
Turn on the resistance manually. If the resistor is off, follow these steps to turn it on manually.
Confirm the value of the timer time. Then the minute value of the timer will blink slowly.
3,2
Icon will flash. Set the timer minute value.

Confirm the value of the timer minutes. Then the ON or OFF icon after timer setting will flash slowly.
If the electric heater is already activated, press will set the action (ON or OFF) of the timer.
Confirm the action (ON or OFF) of the timer. that the 'invalid' icon appears on the screen. Invalid Pressing and holding E-HEATER button for 10s can switch to temperature unit setting for display. From "F" to "C" or from "C" to "F". The default value is “C” (when changing to “F”, it will continue to display “C” while doing the quick check).
The display screen will automatically show a different value in per different action. It will show the last temperature and the icon, if the action is ON, and it will show if the action is OFF
OFF ON/OFF
SET INCREASE If the screen is unlocked, the corresponding value will be increased by pressing . ON To adjust the temperature, press more than
1s, the temperature value will increase continuously; Define the water temperature in the timer setting.
To set the clock/timer, press more than 1s, the clock/timer value will increase continuously;
Confirm and complete the timer. Then repeat this process to define another timer.
To set vacation days, press more than 1s, the value of the day will increase continuously; In query mode, item checking will level up by pressing
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Cancel the CONFIRM/UNLOCK timer
If the screen and buttons are unlocked, press to load the set parameters after changing any parameter. If you press for the next 10s, the setting parameters will be uploaded to the unit; If you press after 10 s, reset all parameters. If the screen and buttons are locked, press for 3s to unlock them.
Access the timer setting.
Select the timer ( ) that you need to cancel. The timer icon will flash slowly if selected.
Confirm to cancel the timer. After
repeat timer selection and cancellation.
If the timer is not set, press the button
the display will show . After completing the
cancel the timer, press the button for
3s to exit the timer cancel.
DISINFECT Invalid
Icon will flash. check timer
Confirm the manual activation of the disinfection function, then the unit will heat the water to 65 or more for disinfection. Select the time ( ) needed to
find out. The timer icon will flash slowly if selected and the actions on the timer (ON or OFF) and clock setting will be displayed. If the If the action is ON, the desired temperature will be displayed. And if the action is OFF, the icon will be displayed.
Disinfection Clock Setting
Press the button for 3s to enter disinfection
clock setting. Then the icon will flash, the
icon will light up and the hour value of the
clock will flash slowly.

Set the value of the clock time. In case of conflict between timer and manual activation: ON 1) Manual activation time has priority; 2) The disabled timer has priority.
Confirm the time setting. Then the minute value of the clock will flash slowly.
Set the value of the clock minutes. CANCEL
To cancel the setting, exit the setting, clear an alarm, etc. To remove the alarm noise, you need to press for 1 s.
Confirm the disinfection clock setting and exit.
The unit will automatically start the disinfection function
time defined above every 7 days.
If the user does not set the disinfection timer, the unit will start
automatically the disinfection function at 23:00 every 7 days.If
unit is OFF or in disinfection mode, press
ON/OFF button and LED indicator
If the unit is in standby, press and the unit will turn off.
on and the unit will turn off.
press and the unit will turn off.
will light if the unit is on or
If the drive is on, press
If the unit is off,
The LED indicator and will be shown on the display screen.
standby and off if the unit is off.
HOLIDAY DECREASE/DOWN If the screen is unlocked, the corresponding value will be
Vacation mode settings
will decrease by pressing To adjust the temperature, press more than 1s, the temperature value will decrease continuously;
Access vacation mode settings. will icon
will blink. The DAY icon will light up.
it will show the vacation days of the previous setting. To set the clock/timer, press more
than 1 s, the clock/timer value will decrease continuously;
Define vacation days. The range of days is 1~99 days (default is 14 days). To adjust holiday days, press more
than 1 s, the value of the day will be decremented continuously; In inquiry mode, the item check will go down in level Confirm the vacation mode settings and exit. The
unit will immediately switch to “Vacation” mode. pressing .
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Q: Why does the temperature on the display sometimes drop but the unit stays closed?
No Icon Description
A: To prevent the unit from turning on/off frequently, the heat source will be activated only when the temperature of the bottom of the tank is lower than the set temperature by 5ºC or more.
In “Vacation” mode, the target water temperature setting is 15ºC as default and it will display the remaining vacation days. On the last day of the vacation, the unit will start disinfection automatically and automatically reset to the target temperature that was before the vacation. If the unit has already been in ‘Vacation’ or OFF mode, pressing will show the invalid icon on the display screen.
Q: Why are there times when the temperature of the screen drops drastically?

Q: Why are there times when the temperature on the display gets very low even though there is a large amount of hot water left that can be discharged? 5.3 Combination button
A: Since the upper water sensor is located in the upper 1/4 of the tank, when drawing hot water, there is still 1/4 of the hot water tank available.
No. Icon Description
Press both buttons at the same time to clear all stored errors and protect codes and the buzzer will sound once.
Q: What do the letters "LA" that sometimes appear on the screen mean? A: The ambient range available for pump operation
of heat is -7-43ºC, if the room temperature is out of range, the system will display this signal as an indication to the user.
+ Clear Error Code
Q: Why sometimes nothing is displayed on the screen? A: To prolong the duration of the display screen, when
the buttons are not used for more than 30 s, the screen will turn off except the LED indicator.
Press both buttons at the same time for 1 s to go to inquiry mode. In query mode, user can check unit settings and operating parameters by pressing
Query Mode
Q: Why are the buttons sometimes unavailable? A: When one minute has passed without any use on the panel, the unit
will block it, and show " ". To unlock it, press “Enter” for 3 seconds.
+ successively. Press the button for
1 s or no button press
operation for 30 s and
exit query mode.
Q: Why does water sometimes come out of the drain pipe of the PT valve? A: Because the tank is pressure resistant type. When heated
the water inside the tank, the water expands and the pressure inside the tank increases; if the pressure rises more than 1.0 MPa, the PT valve will be activated to release the pressure and discharged hot water will drop proportionally. If hot water continuously drops from the drain pipe of the PT valve, it is an abnormal situation. Contact the appropriate personnel for repair.
5.4 Automatic reset
If the power supply fails, the unit can memorize all the set parameters, when the power supply recovers, the unit will work according to the previous programming. 5.5Auto lock button
6.2 About the self-protection of the unit When the button is not operated for 1 minute, all the locked are locked,
except the unlock button (
unlock buttons. ). Press for 3s to 1) When self-protection starts, the system will stop, start
a self-test and will restart when it has protected itself.
5.6 Auto lock screen 2) When a self-protection situation occurs, the buzzer sounds every minute, it will flash and an error code will be displayed on the water temperature indicator. Press the button for one second to stop the buzzer, but the and the error code will not disappear until the protection is done.
When 30 days have passed without any use, the entire screen will lock (turn off) except the error code and alarm light. Press any button to unlock (turn on) the screen.
3) Auto correction can be activated in the following circumstances: The air inlet or outlet is blocked; Elevator is covered by excessive dust; Incorrect power supply (exceeds the 220-240 V range). 6. TROUBLESHOOTING
6.3 When an error occurs 6.1 Normal behavior of the machine (no errors) 1) If several normal errors occur, the unit will automatically go through
to the operation with electrical resistance to supply sanitary hot water; contact qualified personnel for repair.
Q: Why can't the compressor start immediately after setting? A: The unit will wait 3 min to equilibrate the system pressure before restarting.
start the compressor, as a way of protecting the unit. 2) If multiple fatal errors occur, the unit will not boot; contact
contact qualified personnel for repair. Q: Why sometimes the temperature on the display panel drops while the unit is running?
A: When the temperature of the upper part of the tank is much higher than that of the lower part, the hot water from the upper part will mix with the cold water from the lower part which is continuously flowing from the tap water inlet, thus reducing the top temperature.
3) If multiple errors occur, the buzzer will beep 3 times every two minutes and flash quickly. Press for 1s to stop the buzzer, but the alarm icon will keep flashing.
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Cause Solution Error phenomenon
Incorrect connection between plug and socket. cold water
pulled out and display screen is off
Plug;
Water temperature setting too low. Set temp. higher water; Contact the authorized service center.
Defective temperature sensor. The indicator PCB is broken.
The public water supply has been cut off. Wait for the water supply to return. Wait for the inlet water pressure to increase. Open the water inlet valve.
The hot water does not come out
Pressure too low at the cold water inlet (<0.15Mpa). The cold water inlet valve has closed.
The joints in the hydraulic pipes are not well sealed. Water leak Check and reseal all joints.
6.5 Error code resolution table
Tabla 6-2
Fault Description Corrective Actions
The connection between the sensor and the PCB may have loosened or the sensor may have broken. Contact a qualified person to repair the unit.
T5U sensor (upper water temperature sensor) error.
The connection between the sensor and the PCB may have loosened or the sensor may have broken. E1
E2
E4
T5L sensor error (lower water temperature sensor).
Communication error between the tank and the connected controller.
T3 evaporator temperature sensor error.
Contact a qualified person to repair the unit.
The connection between the controller and the PCB may have loosened or the PCB may have broken.
The connection between the sensor and the PCB may have loosened or the sensor may have broken. Contact a qualified person to repair the unit.
The connection between the sensor and the PCB may have loosened or the sensor may have broken. E5
E6
T4 room temperature sensor error. Contact a qualified person to repair the unit.
The connection between the sensor and the PCB may have loosened or the sensor may have broken. Contact a qualified person to repair the unit.
TP compressor discharge temperature sensor error.
Electric leakage error Some wires in parallel may be broken or defective Contact a qualified person to repair the unit.
In the PCB current pull circuit, check if the current difference between L and N is greater than 14 mA. The system will regard it as "electrical leakage error"
E8
The connection between the sensor and the PCB may have loosened or the sensor may have broken. E9
EE
TH compressor suction temperature sensor error. Contact a qualified person to repair the unit.
Open circuit error in the resistance, IEH (difference in intensity between the electrical resistance on and off) <1A)
It is possible that the electrical resistance has been broken or a wire has been badly connected after the repair.
The IC may have broken, but the unit can work fine without clock memory, so the clock will need to be reset when power is restored. EF Clock chip error If necessary, contact a qualified technician to repair the unit.
Ed
P1
E-EPROM chip error Contact a qualified person to repair the unit.
It may be due to the system being blocked, air, water or more refrigerant in the system (after repair), faulty water temperature sensor, etc.
System high pressure protector 2.76 MPa active - 2.07 MPa inactive Contact a qualified person to repair the unit.
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It may be because the system is blocked, air, water or less refrigerant (due to leakage) in the system (after repair), water temperature sensor failure, etc. Contact a qualified person for repair. unit.
Protection against high discharge temperature Tp>110 ºCActive protection Tp<90 ºC Inactive protection
P2
P3 Compressor abnormal stop protection The discharge temperature is not much higher than the evaporator temperature after the compressor has been running for a while.
It is possible that the compressor is broken or there is a bad connection between the PCB and the compressor. Contact a qualified person to repair the unit.
Compressor overload protection. 10 s after the compressor start, the current check starts: 1) The compressor only works, if the int. >10 A, the compressor will stop and be protected. 2) The compressor and the resistance work, if the int. is >IEH+10, the compressor will stop and be protected.
It is possible that the compressor is broken, the system is blocked, air, water or more refrigerant in the system (after repair), faulty water temperature sensor, etc.
P4
THE
When the room temperature T4 is out of the working range of the heat pump (-7 to 43 ºC), the pump will turn off and the unit will show “LA” in the clock position on the display until T4 recovers its value (-743 ). . It's normal, you don't need to do anything.
Only valid for the unit without electrical resistance. The unit with electrical resistance will never show "LA".
Open the drain valve and drain the water completely, until no more water comes out. NOTE: Remove the anode rod. The diagnostic codes listed above are the most common.
If a diagnostic code that is not on the list appears, contact the technical support service indicating the reference number on the cover of this manual. If P3, P4, P2 or P1 appears 3 times in a row in the same heat cycle , the system will assume it is a “Heat pump system error”. Contact a qualified person to repair the unit.
Replace it with a new one and make sure it is well sealed.
Open the cold water inlet tap until water comes out of the outlet tap, then close the water outlet tap.
Connect power and restart the unit.
7. MAINTENANCE
7.1 Maintenance
1)
2)
Check the connection between the plug and the electrical outlet and the ground connection regularly;
In cold areas (below 0 ), if the system is not used for a long time, all the water must be removed from the interior tank and the resistance to prevent it from drying out.
anode rod
4)
It is recommended to clean the inner tank and the resistance every six months to maintain efficient performance.
7.2 Table of maintenance recommendations Inspect the anode washer every six months and change it if it is worn. If you need more information, contact the supplier of the after-sales service.
Tabla 7-1
Check Article
check content
each month
6)
It is recommended to set a lower temperature to reduce heat release, avoid deposits and save energy if the water outlet volume is sufficient.
air filter. (entrance exit)
clean the filter
Clean the air filter every month if you detect any inefficiency in heating performance. Air filter placed directly on the air inlet (ie air inlet without connection to the canvas), the filter disassembly method: unscrew the air inlet ring counterclockwise, take out the filter and wash it completely. Finally, reassemble the drive.
Replace if worn
anode rod every six months
3
4
Clean the tank Clean the electrical resistance
Before shutting down the system for an extended period of time: Turn off the power supply.
7)
8) Operate the PTR valve actuator to ensure that the water channels are not clogged.
Empty all the water from the tank and the pipe, and close all the valves; Valve
PTR Every year
Regularly check the interior components. 5
How to change the anode rod If the water does not flow well when activating the actuator, replace the PT valve with a new one
Disconnect electrical power and close the water inlet valve.
Open the hot water faucet and reduce the pressure in the inner container.
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18
Nominal power/AMPS 4600W/20A Supply 220-240V~ 50Hz
Function control Auto/manual start, error alarms, timer,
etc Protection High pressure protector, protector
against overload, controller and temperature protector, etc.
Power of the electric resistance 3150W RefrigerantR134a(1200g)
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me to
of you
laugh
d e
ag etc
Temp. outlet water temperature Default 55°C, 38-65°C adjustable
Water side heat exchanger Safety condenser, copper tube wrapped around the tank
of storage Inner diam. tube DN20 Outer diam. tube DN20 Diam. Drain pipe DN20 PT valve diameter DN20 Maximum pressure 1.0MPa
La do
from
Material Hydrophilic aluminum fin, inner groove copper tube
Motor power 80W Air circulation channel Vertical inlet/outlet, connection of
Available conduit Dimensions Φ650×1920mm
Chap. 280L water tank Net weight 145.5kg
Fusible link type T30A 250VAC Test conditions: Ambient temperature 15/12ºC (DB/WB), Water temperature from 15ºC to 45ºC.
MD15IU-011BW(DZ-70°C) 16125300A02098