Midea RSJ-15 Type Air-source Heat Pump Water Heater Owner’s Manual

RSJ-15 Type Air-source Heat Pump Water Heater

Product Information

The product is an ALL IN ONE Type Air-source Heat Pump Water
Heater. It is designed to efficiently transfer heat from a lower
temperature source to a higher temperature source. The unit
requires reliable earthing for safe usage. It comes with various
parts including air inlet filter, evaporator, compressor, junction
box cover, rear cover, PT valve, water outlet, TCO ATCO, water
inlet, drain pipe, anode rod, electric heater, electronic control
box, fan assembly, front cover, display, and decorative boards. The
product operates using air and electricity as energy resources and
has different average efficiencies and energy consumption rates
depending on the mode of operation (E-heater or Gas Burner).

Product Usage Instructions

1. Before using the unit, ensure that your house power supply is
   properly earthed. If you are unsure about the earthing, do not
   install the unit yourself. Contact a qualified person such as a
   licensed plumber, authorized electric company personnel, or
   authorized service personnel to perform the reliable earthing
   connection and installation.

2. When ordering repair parts, always provide the following
   information:

   • Model, serial, and product number
   • Parts name

3. Refer to the real sample of the heat pump water heater instead
   of relying solely on the pictures in the manual as they may
   slightly differ from the purchased model.

4. Ensure to read and obey all safety symbols and instructions
   provided in the manual.

5. Thoroughly read all the instructions before installing or
   operating the unit to ensure safety.

6. During transportation, it is recommended to have two or more
   persons carry the unit due to its weight to prevent injury and
   damage.

7. When unpacking the unit, check for the following accessories:

   • Owner’s & Installation Manual (1)
   • One Way Valve (1)
   • Pipeshort for water condensation (1)
   • Drain pipe for water condensation (1)
   • Filter (1)
   • Rings (2)

INSTALLATION & OWNER’S MANUAL
ALL IN ONE Type Air-source Heat Pump Water Heater
Original instructions Thank you very much for purchasing our product, Before using your unit , please read this manual carefully and keep it for future reference.

WARNING
This unit is required reliable earthing before usage, otherwise might cause death or injury.
If you can’t make sure that your house power supply is earthed well, please don’t install the unit. Please have a qualified person perform the reliable earthing connection and the installation of the unit. Examples of a qualified person include: licensed plumbers, authorized electric company personnel, and authorized service personnel.
CAUTION
Children should be supervised to ensure that they do not play with the appliance. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly qualified person. DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of such waste separately for special treatment is necessary. Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities. Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the groundwater and get into the food chain, damaging your health and well-being. The wiring must be performed by professional technicians in accordance with national wiring regulations and this circuit diagram. An all-pole disconnection device which has at least 3mm separation distance in all pole and a residual current device (RCD) with the rating not exceeding 30mA shall be incorporated in the fixed wiring according to the national rule. The handle of PTR valve should be pulled out once per half a year to make sure that there is no jam of the valve. The drainage pipe should be well insulated in order to prevent water inside pipe from freezing in cold weather. This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Cleaning and user maintenance shall not be made by children without supervision.(FOR EN STANDARD) 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. (FOR IEC STANDARD) The discharge pipe connected to PTR is to be installed in a continuously downward direction. The water may drip from the discharge pipe of the pressure-relief device and that this pipe must be left open to the atmosphere. Regarding how the water heater can be drained, thanks to refer to the below paragraphs of the manual.
Your safety is the most important thing we concerned!

PARTS NAMES

Air Inlet Filter
Evaporator Compressor Junction Box Cover
Rear Cover Junction Box
PT Valve Water Outlet
TCO ATCO
Water Inlet Drain Pipe

Anode Rod
Electric Heater

Air Outlet Top Cover Electronic Control Box Fan Assy Front Cover Display
Cover(Anode Rod) Front Decorative Board Cover(Electric Heater)

When ordering repair parts please always give the following information: 1) Model, serial and product number. 2) Parts name.
NOTE
All the picture in this manual are for explanation purpose only. They may be slightly different from the heat pump water heater you purchased (depand on model). Please refer to the real sample instead of the picture of this manual.

CONTENTS

PAGE

BASIC OPERATION PRINCIPLE……………………………………………………1 SAFETY INFORMATION………………………………………………………………1 BEFORE INSTALLATION……………………………………………………………. 3 INSTALLATION………………………………………………………………………… 5 TRIAL- RUNNING……………………………………………………………………….9 OPERATION ………………………………………………………………………….. 12 TROUBLE SHOOTING……………………………………………………………….16 MAINTENANCE………………………………………………………………………. 18 SPECIFICATIONS……………………………………………………………………. 19

0. BASIC OPERATION PRINCIPLE

As we know with our experience, the natural flow of heat, which moves from a higher to a lower temperature source. the heat pump can transfer heat from a lower temperature source to a higher temperature source with high efficiency.

The advantage of a heat pump water heater is that it can supply more heat energy, normally 3 times than input electricity power by extracting the heat from ambient atmosphere in a free charge way to Sanitary Hot Water, compare to the traditional water heater, such as electric water heater or gas burner water heater, their efficiency is normally less than 1, which means it will dramatically cut off the bill of family daily SHW by the application of heat pump water heater, following data will show more details.

Power consumption comparison under the same condition to heat 1 ton water from 15°C to 55°C
The equivalent heat load Q=CM(T1-T2)=1(kCal/kg) X1000(kg)(55-15)=40000kCal=46.67kW*h

HPW H

Gas Burner

Table.0-1 E-heater

Energy Resource

Air,Electricity

Gas

Electricity

Transfer Factor 860kCal/KWh 24000kCal/m³ 860kCal/kWh

Average Efficiency
(W /W )
Energy Consumption

3.5 13.33kW *h

0.8

0.95

2.08m³

49.13 kW*h

Unit Cost 0.09 USD/kWh 2.84 USD/m³ 0.09 USD/kWh

Running Cost

1.2

USD

5.9

4.42

E-heater

Running Cost USD

Gas Burner

HPWH

0

1

2

3

4

5

6

7

Fig.0-1

NOTE
Above calculation is based on the ideal condition, the final cost bill will be different caused by the actual running conditions, such as running period, ambient temperature, etc.

1. SAFETY INFORMATION
Please read thoroughly all of the instrucitons before installing or operating the unit. Following safety symbol is very important, always read and obey all safety symbol:

CAUTION

You may be injured if you don’t obey instructions.

You may be killed or seriously

WARNING injured if you don’t obey

instructions.

You may be killed or seriously

DANGER injured immediately if you don’t obey instructions.

WARNING
The unit must be earthed effectively. A creepage breaker must be installed adjacent to the power supply. Do not remove, cover or deface any permanent instructions, lables, or the data label from either the outside of the unit or inside of unit panels. Ask qualified person to perform the installation of this unit in accordance with local national regulations and this manual. Improper installation may result in water leakage, electric shock or fire. Ask qualified person for relocating, repairing and maintaining the unit instead of doing by yourself. Improper installation may result in water leakage, electric shock or fire. Electric connection work should obey the instructions of local power company, local electric utility and this manual. Never use the wire and fuse with wrong rated current, otherwise unit may break down and cause fire furthermore. Do not insert fingers, rods or other objects into the air inlet or outlet. When the fan is rotating at high speed, it will cause injury. Never use a flammable spray such as hair spray, lacquer paint near the unit. It may cause a fire. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly qualified person.

1

DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of such waste separately for special treatment is necessary. Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities.Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the groundwater and get into the food chain, damaging your health and well-being.
CAUTION
The earthing pole of socket must be grounded well, make sure that power supply socket and plug are dry enough and connected tightly. How to check the power supply socket and plug are qualified? Turn on power supply and keep the unit running for a half hour, then turn off power supply and plug out, check whether the socket and plug is hot or not. Before cleaning, be sure to stop the operation and turn the breaker off or pull out the power plug. Otherwise, an electric shock and injury may be caused. Water temperature over 50¥ can cause severe burns instantly or death from scalds. Children, disabled and elderly are at highest risk of being scalded. Feel water before bathing or showering. Water temperature limiting valves are recommanded. Do not operate the unit with a wet hand. An electric shock may be caused. The installation height of power supply should be over 1.8m, if there is any water spattered, separate the power supply from water. A one-way valve must be installed on the water inlet side, which is available from accessories, see manual “accessories” part. It’s normal if some water drops from the hole of PT valve during operation. But, if there is a great amount of water, call your service agent for instructions.
2

After a long term use, check the unit base and fittings. If damaged, the unit may sink and result in injury. Arrange the drain pipe to ensure smooth draining. Improper drainage work may cause wetting of the building, furniture etc. Do not touch the inner parts of the controller. Do not remove the front panel. Some parts inside are dangerous to touch, otherwise a machine malfunction may be caused. Do not turn off the power supply. System will stop or restart heating automatically. A continuous power supply for water heating is necessary, except service and maintenance. If the unit has not been used for a long period of time(2 weeks or more), hydrogen gas will be produced in the water piping system. Hydrogen gas is extremely flammable. To reduce the risk of injury under these conditions, it is recommended that open the hot water tap for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system. When hydrogen is present, there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow. There should be no smoking or open flame near the tap at the time it is open. Confirm the safety of the installation area ( walls, floors, etc. ) without hidden dangers such as water, electricity, and gas. Before wiring/pipes. Before installation , check whether the user’s power supply meets the electrical installation requirements of unit ( including reliable grounding , leakage , and wire diameter electrical load, etc.). If the electrical installation requirements of the product are not met, the installation of the product is prohibited until the product is rectified. When installing multiple air conditioners in a centralized manner, please confirm the load balance of the three-phase power supply, and multiple units are prevented from being assembled into the same phase of the three-phase power supply. Product installation should be fixed firmly, Take reinforcement measures, when necessary.

2. BEFORE INSTALLATION
2.1 Unpacking
2.1.1 Accessories

Table.2-1

Accessory Name Qty. Sharp

Purpose

Owner’s & Installation Manual

1

One Way Valve

1

Pipeshortfor water condensation

1

Drain pipe for water condensation

1

Filter

1

Ring

2

Installation and use instruction This manual Prevent water from flowing backwards
Discharge condensated water
Discharge condensated water

2.1.2 How to transport

1. In order to avoid scratch or deformation of the unit surface, apply guard boards to the contacting surface. No contact of fingers and other things with the vanes. Don’t incline the unit more than 75° in moving, and keep it vertical when installing.

75°
Gradient limit>75°

2. This unit is heavy, it need to be carried by two or more persons, othewise might cause injury and damage.

2.2 Location requirements

1. Enough space for installation and maintenance shall be preserved.
2. The air inlet and outlet should be free from obstacles and strong wind.
3. The base surface should be flat, surface should be inclined no more than 2°and able to bear the weight of the unit and suitable for installing the unit without increasing noise or vibration.
4. The operation noise and air flow expelled shall not affect neighbors.
5. No flammable gas is leaked nearby. 6) It is convenient for piping and wiring. 7) If it is installed in indoor space, it might cause indoor temp
   decreased and noise. Please take preventive measures for this. 8) If the unit has to be installed on a metal part of building, make
   sure the well electric insulation which should meet the relevant local electric standard.

CAUTION

The ambient air temperature must also be considered when installing this unit, in heat pump mode the ambient air temperature must be above -7¥ and below 43¥.If the ambient air temperature falls outside these upper and lower limits,the electrical elements will activated to meet the hot water demand and the heat pump does not operate. The unit should be located in an area not subject to freezing temperatures. The unit located in unconditioned spaces(i.e., garages, basements, etc.) may require the water piping, condensate piping, and drain piping to be insulated to shelter agianst freezing.

CAUTION
Installing the unit in any of the following places may lead to malfunction(If it is inevitable, consult the supplier).
The site contains mineral oils such as lubricant of cutting machines. Seaside where the air contains much salt. Hot spring area where corrosive gases exist, e.g., sulfide gas. Factories where the power voltage fluctuates seriously. Inside a car or cabin. The place with direct sunlight and other heat supplies. If there’s no way to avoid these, please install a covering. Place like kitchen where oil permeates. Place where strong electromagnetic waves exist. Place where flammable gases or materials exist. Place where acid or alkali gases evaporate. Other special environments.
WARNING
The unit must be securely fixed, elsewise, noise and shaking may be resulted. Make sure that there’s no obstacle around the unit. In the place where there is strong wind like seashore, fix the unit in the location protected from the wind.

3

2.3 Maintenance space requirements (unit: mm)
Air inlet

600

600 600 Barrier

Air outlet
Display
600

Fig.2-1

2.5 Unit outline dimension (unit: mm)

1760

600

800 600

560 Fig.2-3
560

Fig.2-2
2.4 If installed in inclosed space
The water heater must be located in a space >15m³, and must have unrestricted air flow. As an example, a room that has an 2.5 tall ceiling and is 3 meter long by 2 meter wide would contain 15m³ .

Fig.2-4

4

3. INSTALLATION

The circulating air for every unit should be more than 350m3/h.Make sure there is enough installation space.Outline dimensional drawing(see Fig.2-3,Fig.2-4)

3.1 Water System Piping

User

Upper Condensate Outlet
Lower Condensate Outlet

PT Valve

Water Outlet

Temp. Limiting Valve

Water Inlet

Note: Water temperature limiting valve is recommended for mixing the inlet cold water with outlet hot water to prevent burns caused by hot water

Drainage pipe

Shut Off Valve

One Way Valve

Shut Off Valve Tap Water

Barrel-drain
Water inlet or outlet pipes: The spec of the water inlet or outlet thread is RC3/4″ (external thread). Pipes must be heat-insulated well. 1) Installation of the pipe for PT valve: The spec of the valve
connecting thread is RC3/4″ (internal thread). After installation, it must be confirmed that the drainpipe outlet is exposed in the air.

CAUTION

Piping water system as the above figure. In

case of installing it at a place where outside

temperature below freezing point, insulation

must be provided for all hydraulic components.

The handle of PT Valve should be pulled out

once per half a yearto make sure that there is

no jam of the valve. Please beware of burn,

beware of the hot water from the valve.

The drainage pipe should be

well insulated in order to

Handle

prevent water inside pipe from

Drainage pipe

freezing in cold weather.

WARNING
Do not dismantle the PT Valve. Do not block off the drainage pipe. It will cause explosion and injury, if do not comply with the above EXPLOSION instruction.

Expansion Tank for pressure relief(recommended)

Fig.3-1

2. Installation of the One Way Valve: The spec of the One Way Valve thread in accessories is RC3/4″. It is used to prevent water
   from flowing backwards.

3. After water system piping work, turn on the cold water inlet valve and hot water outlet valve and start effusing the tank. When water flow smoothly out from water outlet pipe(tap water outlet), the tank is full, turn off all valves and check pipeline to make sure there is no any leakage.

4. If the inlet water pressure is less than 0.15MPa, a pump should be installed at the water inlet. For guarantee the safety usage of tank at the condition of water supply pressure higher than 0.65MPa, a reducing valve should be installed at the water inlet pipe.

5. Condensate may be leaked from unit if drainage pipe is blocked or unit operates in high humidity environment, a drainage pan is recommanded as shown as following figure:

Max.22mm

Heat Pump Water Heater

50mm larger than the dia. of unit

Fig.3-2

5

3.2 Air duct connection

1. Air inlet and outlet with duct. (A+B5m)

B Air inlet

A Air outlet

3. Air inlet connects to duct, air outlet without duct.(A5m)

A Air inlet

Air outlet

160mm

Fig.3-3

2. Air inlet without duct, air outlet connects to duct. A5m

Air inlet

A Air outlet

160mm

Fig.3-5
It is recommended to install unit by this way in summer that could charge fresh air into room.

4. Duct Description
   Duct
   Dimension(mm)
   Straight-line pressure drop (Pa/m)
   Straight-line length (m) Bent pressure drop(Pa) Bent’s qty.

Round duct 160
2
5 2 5

Table.3-1 Rectangle
duct 160X160
2
5 2 5

Fig.3-4
It is recommended to install unit by this way in the winter where there is other heat source in the room.

6

NOTE
The resistance of duct will decrease air-flow-rate, which will lead to capacity of unit decreased. For the case of unit with duct, the duct total length should be no more than 5m or the maximus static pressure should be within 25Pa, and the quantity of bending should be no more than 5. For unit air outlet with duct, when unit operating, condensate will be generated aroud outside of duct. Please pay attention to the drainage work, we sugest to wrap the thermal insulated layer around ouside of the duct.
It is recommended to install the unit in the indoor space, it is not allow to install the unit at the rainy space.
Rain

5. Filter installing at the unit inlet. In terms of the unit with duct, filter in there must be put on the position of duct inlet. (Fig.3-8/3-9)

inlet Filter

oulet

Fig.3-8 D

2.5D

Filter

Owner should install the filter by self; and the mesh size is about 1.2mm.

Unit

Fig.3-6

Weather shed

Rain

Fig.3-9
6) To smoothly drain condensate from unit, please install the unit at a horizontal floor. Otherwise, please ensuring the drain vent is at the lowest place. Recommending the inclination angle of unit to the ground should be no more than 2°.
Drain

Unit
Fig.3-7
WARNING
In case of rain entering to internal components of the unit, the component might be damaged or causing physical danger. (Fig.3-6) In terms of the unit connect with duct reaching to outdoor, a reliable waterresistant measure must be conduct on the duct, to prevent water from dropping into internal of the unit. (Fig.3-7)
7

2o Drain
Fig.3-10

3.3 Electric Connection
CAUTION

3.3.2 Switch setting Select the model by dialing S1 on the motherboard
ON

The power supply should be an independent circuit with rated voltage.
Power supply circuit should be earthed effectively. The wiring must be performed by professional technicians in accordance with national wiring regulations and this circuit diagram.
An all-pole disconnection device which has at least 3mm separation distance in all pole and a residual current device (RCD)with the rating of above 10mA shall be incorporated in the fixed wiring according to the national rule.
Set the electric leakage protector according to the relevantelectric technical standards of the state The power cord and the signal cord shall be laid out neatly and properly without mutual interference or contacting the connection pipe or valve. After wire connection, check it again and make sure the correctness before power on.

S1 1 2 3 4 Fig.3-11

3.3.3 Electric leakage protector

Power Supply

L
N
GND

Creepage Protector
Power Cable with Creepage Breaker

Fig.3-12 3.3.4 When Modbus and remote switch are optional: 1) After the weak current connection cable group is inserted,
the outgoing part should be fixed in the press clamp together with the power cable.see Fig.3-13 2) The mating terminal should be placed on the top to prevent it from being wetted by the condensate in the drain pan. 3) Route the weak-current cable group and power cable through the two holes reserved on the junction box cover.see Fig.3-14 4) MODBUS and remote switch functions require the purchase of connecting wires. The length of each wire is 6m. Select and purchase the corresponding number of wires according to the demand.

3.3.1 Specifications of Power Supply

Table. 3-2

Model Name

RSJ-15/190RDN3-F(WF)

Power Supply
MIin. Diameter of Power Supply Cord (mm2 )
Earth Cord(mm2 ) Manual Switch(A) Capcity/Fuse(A)
Creepage Breaker

220-240V50Hz
4
4 30/25 30 mA 0.1sec

Please choose the power cord according to above table, and it should comply with local electric standard.
The power cord model, recommanded power cord mode is H05RN-F.
When wiring the power supply, please add additional insulation sheath at the place without rubber insulation layer.

WARNING
The unit must be installed with an Creepage Breaker near the power supply and must be effectively earthed.

Fig.3-13

Fig.3-14

3.4 Installation checklist
3.4.1 Location The flooring beneath the water heater must be able to support the weight of the unit when filled with water (more than 286kg).
Located indoors (such as a basement or garage) and in a vertical position. Sheltered from freezing temperatures.
Provisions made to shelter the area from water damage. Metal drain pan installed and piped to an adequate drain.
Sufficient room to service the water heater.
Sufficient air for the heat pump to function, the water heater must be located in a space >15m³, and must have unrestricted air flow.

8

NOTE
For optimal efficiency and serviceability, the following clearances should be maintained: 800mm on the air inlet side, 800mm on the air outlet side, 600mm in the back, and 600mm in the front.
The unit cannot be placed into any type of closet or small enclosure.
The site location must be free from any corrosive elements in the atmosphere such as sulfur, fluorine, and chlorine. These elements are found in aerosol sprays, detergents, bleaches, cleaning solvents, air fresheners, paint, and varnish removers, refrigerants, and many other commercial and household products. In addition excessive dust and lint may affect the operation of the unit and require more frequent cleaning.
The ambient air temperature must be above -7ºC and below 43ºC.If the ambient air temperature falls outside these upper and lower limits the electrical elements will be activated to meet the hot water demand.
3.4.2 Water System Piping
PT valve(Temperature and pressure relief valve) properly installed with a discharge pipe run to an adequate drain and sheltered from freezing.
All piping properly installed and free of leaks.
Unit completely filled with water.
Water temperature limit valve or mixer tap(recommanded) installed per manufacturer’s instructions.
3.4.3 Condensate Drain Line Installation
Must be located with access to an adequate drain or condensate pump.
Condensate drain lines installed and piped to an adequate drain or condensate pump.
3.4.4 Electrical Connections
The water heater requires 220 VAC for proper operation.
Wiring size and connections comply with all local applicable codes and the requirements of this manual.
Water heater and electrical supply are properly grounded.
Proper overload fuse or circuit breaker protection installed.
3.4.5 Post Installation Review
Understand how to use the User Interface Module to set the various modes and functions.
Understand the importance of routine inspection/maintenance of the condensate drain pan and lines. This is to help prevent any possible drain line blockage resulting in the condensate drain pan overflowing.
IMPORTANT: Water coming from the plastic shroud is an indicator that both condensation drain lines may be blocked. Immediate action is required.
To maintain optimal operation check, remove and clean the air filter.

4. TRIAL-RUNNING

4.1 Water affusion before operation
Before using this unit, please follow the steps below.
Water Affusion: If the unit is used for the first time or used again after emptying the tank, please make sure that the tank is full of water before turning on the power. Method: see Fig.4-1

Open the cool water inlet valve and the hot water outlet valve.

Open

Open

Cool water inlet

Hot water outlet

Water Affusion
When water flows out from the water outlet, the tank is full. Turn off the hot water outlet valve and water affusion is finished.
Close Hot water outlet

Water out
Fig.4-1
CAUTION
Operation without water in water tank may result in the damage of auxiliary e-heater. Due to such damage, manufacturer will not be liable for any damages caused by this issue.

After powered on, the display lights up. Users can operate the unit through the buttons under the display. Emptying: If the unit needs cleaning, moving etc, the tank should be emptied. Method: See Fig.4-2:

Close the cool water inlet valve, open the hot
water outlet valve and open drainpipe. Open

Close

Hot water outlet

Cool water inlet

Open Drainpipe shut-off valve

9

Emptying After emptying, please replace the nut of drainpipe.
Close Drainpipe shut-off valve
Fig.4-2

3. Modes will be automatically selected by unit. manually mode selection is unavailable.

Running Temperature Range Setting water temperature target range: 38~70ºC. E-heater running ambient temperature range: -20~45ºC. Heat pump running ambient temperature range: -7~43ºC. Water temperature limits:

Table.4-1

Ambient Temp.(T4)

T4-7 -7T4-2 -2T42 2T443 43T4

Max.Temp.

(Heat pump) —

45

60

70

—

Max. Temp. (E-heater)

70

70

70

70

70

4.2 Trial- running
4.2.1 Checking list before commisionning.

1. Checking list before trial-running. 2) Correct installation of the system.
2. Correct connection of water/air piping and wiring;. 4) Condensate draining smoothly well insulation work for all
   hydraulic part. 5) Correct power supply. 6) No air in the water pipeline and all valves opened. 7) Effective electric leakage protector installation. 8) Sufficient inlet water pressure (between 0.15MPa and 0.65MPa).
   4.2.2 About Running
3. System Structure Figure Unit has two kinds of heat sources: heat pump(compressor) and electric heater. Unit will automatically select heat sources to heat water to the target temperature.

Water outlet Temperature sensor(T5U) Temperature sensor(T5L)
Electric heater
Water inlet

Tank

Fig.4-3

4. Heat Source Shift

The default heating source is heat pump.

If ambient is range out of heat pump, heat pump will stop

running, the unit will shift automatically to activate E-heater and

show the icon LA(

) on the display, then if the ambient

temperature goes into the running range of heat pump again, it

will stop E-heater and shift automatically to heat pump again,

and the icon LA( ) will be extinguished.

If the target setting water temperature is higher than Max. temp(Heat pump), the unit will activate heat pump firstly to the Max. temperature, then stop heat pump, activate E-heater to continually heat water to the target temperature.

If manually activate the E-heater running when heat pump running, E-heater and heat pump will work together until the water temperature gets to target temperature. So if want to heat quickly, please manually activate E-heater.

NOTE

E-heater will be activated once for the current heating progress, if want to apply E-heater again, plsease push the button to switch E-HEATER mode.

If system occurs some malfunctions, error code “E7” and will be shown on the display, then heat pump will stop running, and the unit will activate automatically E-heater as the backup heat source, but the code “E7” and will be shown until power off.
NOTE
If only use E-heater, about only 75 liters water will be heated, so must set higher target water temperature if ambient temperature is out of heat pump running range.

2. Water Temperature Display The temperature shown on the display depends on the upper sensor. So it is normal that the display temperature has reached to target temperature but compressor still running, because the lower water temperature does not get to target temperature.
   10

Defrosting During Water-heating In heat pump running period, if the evaporator frosted in lower ambient temperature, the system will defrost automatically to keep effective performance(about 3~10min). At defrosting time, the fan motor will stop, but compressor will still run.
Heat-up Time There are different heat-up times in different ambient temperature. Normally lower ambient temperature result longer heat-up time because of lower effective performance.

Time(h)

12

10

8

15-45

15-55

6

15-65

4

15-70

2

0 -7 -5 2 7 20 25 30 32 35 40 45

Ambient temp(°C)

Fig.4-4

When ambient temp below 2heat pump and E-heater will take different portions of heating capacity, generally the lower of ambient temperature, the lower portion of heat pump will be taken as well as the higher portion of E-heater will account for. More detail please refer to Table.4-1.

4.2.4 Query function

For the convenience of maintenance and debug, query function is

available by Press 3 buttons together:

+ +

,

then system running parameters will be shown one by one with

following sequence by each pushing of

or

button.

Table.4-2

Hour Min. Min.

unit

No. low bit high bit Low bit

Explenation

1

Temp.

T5U

2

Temp.

T5L

3

Temp.

T1

4

Temp.

T7

5

About TCO and ATCO

The power of compressor and E-heater will be automatically

6

shut-off or turn on by TCO and ATCO.

If the temperature is higher than 78, the ATCO will

7

automatically shut off the power of compressor and E-heater,

and turn on it if the temperature fall down below 68. 8

If the water temperature is higher than 85, the TCO will

automatically shut off the power of compressor and E-heater. After that it needs to be reset manually.

9

10 Restart After a Long Term Stop

When the unit is restarted after a long term stop(trail running

included), it is normal that outlet water is unclean. Keep the tap on and the water will be clean soon.

11

NOTE

12

While the ambient temperature below

than -7¥, heat pump efficiency will

13

decrease dramatically, the unit will

automatically shift to E-heater running.

14

15 4.2.3 Basic function

16

1. Weekly disinfect function

Under disinfection unit immediately start to heat water up to 70

17

to kill the potential legionella bacteria inside water of tank,

icon will be lightened on the display screen during disinfection; Unit will quit disinfection if water temperature is higher than 70

18

and extinguish icon.

19

2. Vacation function:

Press the

button to select VACATION , Unit will automati-

cally heat water to 15 for the purpose of energy saving during

vacation days.

20

3. Rmote shutdown function:

Users can connect a switch.If the switch is closed, the unit will be

21

stopped forcibly.If switch breaks, the unit can run normally

according settings.

Temp.

T3

Temp.

T4

Temp.

TP

Temp.

Th

Current

Current value

Current
Fan
Electronic expansion valve Warm water valve
Frequency

Electric heating current value
0OFF 1Low fan 2/3:High fan
Electronic expansion valve 1/8
Warm water valve1/32
Compressor frequency

Version Version

Host software version
Display board software version
Last error code

Previous 1st error or protection code
Previous 2nd t error or protection code
Model code: 01 Europe 190 02Europe 300 03 Australia 190 04 Australia 300

End sign

4. How is the unit running:

If unit is OFF->press

->unit will be waken->press

to set target water temperature(38-70)->press

->unit

will automatically select heat source and start to heat water to

target temperature.

11

5. OPERATION
5.1 Control Panel Explanation
Display
Operation

5.2 Display Explanation

Fig.5-1

17

19

18

12 13 14

15

16

11

Table.5-1 No Icon Description

Fig.5-2

will be lightened if screen is unlocked.

It shows water temperature on normal;

It shows remaining vacation days on vacation;

It shows setting temperature on setting;

It shows unit setting/running parameters,

error/protection code on querying.

Time and clock setting

shows the clock. Whenever there is any setting for clock,

SET TIME will be lightened.

There are six timers can be set.

If anyone of them has been set, this icon

will lighten the corresponding one when

screen is unlocked

3

If there is none of timers has been set, it will

keep extinguished.

If timer is being set, this icon will flash the

corresponding one with 2Hz frequency as

well lighten the timer which has been set.

No Icon Description

4

Reserved

5

will be lightened when the machine is disinfecting.

Compressor:

6

will be lightened when compressor is

running, otherwise will be extinguished.

Lock:

7

If button is locked, will be lightened,

otherwise will be extinguished.

Solar:

8

will be lightened when the machine is connected

to the solar signal or connected with the solar water

pump.

E-heat:

9

will be lightened when E-heat is running,

otherwise will be extinguished.

High temp. Alarm

10

If water temp is higher than 50

will be lightened, otherwise will be

extinguished.

Error:

11

will be lightened when unit is under

protection/error.

VACATION MODE:

will be lightened when the machine is running in

12

VACATION mode.

The default initial vacation days of vacation mode are

14 days, And you can adjust the days from 1 to 360.

The button is disinfected after the holiday.

HYBRID MODE:

13

will be lightened when the machine is running in

HYBRID mode.

E-HEAT MODE:

14

will be lightened when the machine is running in

E-HEAT mode.

ECONOMY MODE:

15

will be lightened when the machine is running in

ECONOMY mode.

16

When any key is invalid, this icon will flash once.

17

The icon lights up when the water temperature is being set.

18

The icon lights up when the clock is being set.

Wireless Network:

will be lightened when Wireless Network

is connected;

19

will be extinguished when Wireless Network

is not connected;

will flash with 2Hz frequency when setting Wireless Network.

12

MODE

CLOCK

TIMER ON/OFF

DISINFECT

Fig.5-3

Any press of button is effective only under button and display unlocked state.
Table.5-2
No. Icon Description

Use this key to switch mode Default HYBRID mode

No Icon Description DISINFECT
Manually turn on disinfect function

Icon

will light up. then the unit will

heat up water to 70 at least for

disinfection.

When the machine is disinfectedpress this button to cancel it then the will be extinguished

3
Wireless Network on/off

Press button

for 3sec to turn on

Wireless Network.

CANCEL

This key is used to cancel all settings
and exit the setting state. WhenWireless Networkconnection is normal, long
press the Cancel button for more than 8s
to exit Wireless Network connection.

MODE Switch to E-heater mode

1

MODE

MODE Switch to ECONOMY mode MODE Switch to VACATION mode

CLOCK

Press this butt
on to enter the clock setting, SET TIME will be on, and the hour value of clock will flash

Adjust hour value of clock

Adjust vacation days (1-360 days) MODE Switch to HYBRID mode

5 CLOCK

Confirm the hour value and enter the minute value setting

INCREASE

If screen is unlocked, corresponding value will

increase by pressing

.

When setting temperature, press

more than

1s, temperature value will be increased

2

continuously;

When setting clock/timer, press

more than

1s, clock/timer value will be increased continuously;

When setting vacation days, press

more

than 1s, day value will be increased continuously;

On querying, check items will page up by pressing

.

Adjust minute value Confirm clock setting

13

No Icon

Description
TIMER ON/OFF

Timer button

TIMER ON/OFF

Enter the 6-segment timing setting, 1ON icon is always on, enter the TIMER ON setting, and the hour value flashes

Adjust hour value

6

TIMER

ON/OFF

Confirm the hour value and enter the minute value setting
Adjust minute value
Confirm the minute value and enter the TIMER OFFsetting. At this time, 1OFF ICON is always on and the hour value is flashing
Adjust hour value

Confirm hour and enter minute setting

Adjust minute value

Confirm the minute value and complete the 1 st segment timer setting.
NOTE 1. During the setting process, press the time / ON/OFF key to enter the next ON/OFF setting 2. In the process of setting, press time / ON/OFF to enter the next part of this segment 3. During the setting process, press the cancel key to cancel the timing operation being set and return to the main interface 4. If there is any conflict in the setting time, the lastest set time shall prevail, and the previous period of timing will be cancelled automatically. If the set ON/OFF time are the same, this of segment setting is invalid

CONFIRM/UNLOCK

If screen and buttons are unlocked, press it to

upload setting parameters after setting any

parameter.

7

If screen and buttons are locked, press it for 3s to

unlock them.

No Icon Description

DECREASE/DOWN

If screen is unlocked, corresponding value will

decrease by pushing .

When setting temperature, press more

than 1s, temperature value will be decreased

continuously;

When Setting clock/timer, press more than

8

1s, Clock/timer value will be decreased

continuously;

When setting vacation days, press more

than 1s, day value will be decreased continuously;

On querying, check items will page down by

pressing .

ON/OFF button and LED indicator

If unit is standby, press

, then unit will be OFF.

If unit is ON, press

, then unit will be OFF.

9

If unit is OFF, press

, then unit will be ON.

LED indicator

will be lightened if unit is ON or

standby and extinguished if unit is OFF.

5.3 Combination button

No.

Icon

Description

Sterilization time setting

MODE +
Choose 01

Press the confirm key to enter. At this time, the sterilization icon and the first two value of 8888 light flash, indicating that the hour can be modified; after pressing the confirm key, the last two value of 8888 light flash, indicating that the minutes can be modified. After setting, press OK to save the settings and exit. (press the Cancel button to exit the sterilization time setting) if the customer has not set the sterilization start time, carried out sterilization mode on 23:00 defaultly,, once every 7 days; if the customer has set the sterilization start time, the sterilization will be carried out according to the sterilization start time set , once every 7 days.

Error code

MODE +
Choose 03

Press the confirm key, the buzzer will give a short sound, and the unit will automatically clear the protection or error code

14

5.4 Mobile Device Setting
AP Mode is available for wireless distribution on mobile device side. AP Mode connecting WLAN:
1 Install App 1)Scan the following QR code to installthe Smart Home APP. 2)Please research “Comfort Home” in APP STORE or GOOGLE PLAY to install the APP. This APP is only applicable to Android 4.4 and IOS10,or newer operation systems.

4 Choose Air Source Heat Pump Water Heater.

2 Register or Login account Open the App and create auser account, if you already have one, just log in.
5 Connected to the network Follow the insturctions in the app to set up the Wireless Network connection. If the network connection fails, please refer to the App tips for operation.
3 Add your appliance Tap the “+”icon to add home appliance to your MsmartLife account.
5.5 Auto-restart If electricity power failed, unit can memorize all setting parameters, unit will be back to the previous setting when power recover. 5.6 Button Lock 1) This key is used to confirm user setting parameters and unlock the
keyboard. 2) When the screen is activated and unlocked, long press the button
for 3S to lock the screen. 3) When the screen is activated and locked, long press the button for
3S to lock the screen. 5.7 Screen Auto Lock If there is no operation of button for 30s, screen will be locked (extinguished) except for error code and alarm icon.Press any button will unlock the screen(lighten).
15

6. TROUBLE SHOOTING

6.1 Non-error tips
Q: Why compressor can’t start immediately after setting? A: Unit will wait for 3 min to balance the pressure of system before
start compressor again, it’s a self protection logic of unit.
Q: Why sometimes the temperature shown on the display panel decreased while unit is running?
A: When the upper tank temperature is much higher than the bottom part, upper part hot water will be mixed by the bottom cold water which is continually flow from inlet tap water so that will decrease the upper part temperature.
Q:Why sometimes the temperature shown on the display decreased but unit still keep closed?
A: to avoid unit ON/OFF frequently, unit will activate heat source only when bottom tank temperature is lower than setting temperature for at least 5 ºC.
Q:Why sometimes the temperature shown on the display will decreased dramatically?
A: Because tank is pressure-bearable type, if there is massive hot demand, hot water will quickly tapped out from upper part of tank as well as cold water will quickly tapped into bottom part of tank, if the cold water surface emerge the upper temperature sensor, temperature shown on the display will decreased dramatically.
Q:Why sometimes the temperature shown on the display is decreased a lot, but there is still a mount of hot water can be tapped?
A:Because the upper water sensor is located on the upper 1/4 tank, when tapping hot water out, it means there is at least 1/4 tank of hot water available.
Q:Why sometimes unit shows “LA” on display ? A: The heat pump available running ambient range is -7-43,if ambient temperature is out of range, system will show above-mentioned signal to let user notice it.
Q: Why something there is nothing shown on the display? A: To maintain display screen lifespan within along term, when there
is no button operation for 30 sec, it will extinguish the display except the LED indicator.
Q: Why sometimes the buttons are unavailable? A: if there is no operation on panel for 1 min, unit will lock the panel,
shows ” “, to unlock the panel, please press the “ENTER” button for 3 seconds.(some units)
Q: Why sometimes there is some water flowed from drainage pipe of PT valve?
A: Because the tank is pressure-bearable one, when water is heated inside the tank, water will expand, so the pressure inside of tank will increase, if pressure goes up more than 1.0Mpa, PT valve will activate to relief the pressure and hot water drop will be discharged correspondingly. If water drop is continually discharged from PT valve drainage pipe, it is abnormal, please contact qualified stuff to repair.

6.3 When Error happened

1. If some normal errors happen, unit will automatically shift to E-heater for emergent SHW supply, please contact qualified staff to repair.
2. If some sever error happen, unit will not start, please contact qualified staff to repair.
3. When a fault occurs, the buzzer will sound twice per minute for 10 minutes, and the fault icon will always be displayed.

6.4 Error phenomenon shooting

Error phenomenon

Possible reason

Table.6-1 solution

Cold water tapped out and display screen extinguished

1. Bad connection between power supply plug and socket;
2. Setting water temperature too low;
3. Temp. sensor broken; PCB of indicator broken.

1. Plug in; 2. Setting water temp. higher; 3. Contact service center.

No hot water tapped out

1. Public water supply

ceased;

1. Waiting for public water

supply recover;

2. Cold water inlet pressure too low (<0.15 MPa);

2. Waiting for inlet water

pressure increase;

3. Cold water inlet valve closed.

3. Open water inlet valve.

Water leakage

Hydraulic pipeline joints are not sealed well.

Check and reseal all joints.

6.2 Something about self-protection of unit

1. When the self-protection happens, the system will be stopped and start self-check, and restart when the protection resolved.
2. When the self-protection happens, the buzzer will buzz in every other minute, the will flash and error code will be shown at water temperature indicator. The and error code does not disappear until protection resolved.
3. In the following circumstance, self-protection may happen: Air inlet or outlet is blocked;The evaporator is covered with too much dust;Incorrect power supply(exceeding the range of 220-240V).

16

6.5 Error code shooting table

Table.6-2

Display E0 E1 E2 E4 E5 E6

Malfunction Description Error of sensor T5U(upper water temperature sensor) Error of sensor T5L(lower water temperature sensor) Tank and Wired Controller communication error Evaporator temperature sensor T3 error Ambient temperature sensor T4 error Compressor discharge temperature sensor TP error

Corrective action
Maybe the connection between sensor and PCB has released or sensor has been broken. Contact a qualified person to service the unit.
Maybe the connection between sensor and PCB has released or sensor has been broken. Contact a qualified person to service the unit.
Maybe the connection between controller and PCB has released or PCB has been broken.
Maybe the connection between sensor and PCB has released or sensor has been broken. Contact a qualified person to service the unit.
Maybe the connection between sensor and PCB has released or sensor has been broken. Contact a qualified person to service the unit.
Maybe the connection between sensor and PCB has released or sensor has been broken. Contact a qualified person to service the unit.

E8

Electric leakage error If PCB current_induction_circuit check the current difference between L,N >14mA, system consider it as “electric leakage error”

Maybe some wires have been broken or bad wire connection. Contact a qualified person to service the unit.

E9 Compressor suction temperature sensor TH error

E-heater open-circuit error( IEH(Current difference

EE

E-heater on & e-heater off )<2A)

P1

System high pressure protection 3.0MPa active 2.4Mpa inactive

Maybe the connection between sensor and PCB has released or sensor has been broken. Contact a qualified person to service the unit.
Maybe the E-heater has been broken or bad wire connection after repair.
Maybe because of system blocked, air or water or more refrigerant in system(after repair), water temperature sensor malfunction, ect. Contact a qualified person to service the unit.

High discharge temperature protection

P2

Tp>115Protection active

Tp<90Protection inactive

Maybe because of system blocked, air or water or less refrigerant(leakage) in system( after repair), water temperature sensor malfunction, ect. Contact a qualified person to service the unit.

Compressor abnormally stopped protection

Maybe because of compressor broken or bad connection

The discharge temperature is not so higher than

between PCB and compressor.

P3

evaporator temperature after compressor running a Contact a qualified person to service the unit.

term.

Compressor overloaded protection (10 secs after

compressor startup, current checking starts ,

Maybe because of compressor broken, system blocked,

P4

1)only compressor running, if it is >7A , the

compressor will be stopped and protected.)

air or water or more refrigerant in system(after repair), water temperature sensor malfunction, ect.

2)Compressor+E-heater running, if it is >IEH+7,the Contact a qualified person to service the unit.

compressor will be stopped and protected.)

When the ambient temp T4 is out of Heat Pump running range (-743) Heat Pump will stop, unit will

show LA on the position of clock on display until T4

LA

back to (-743).

It is normal, and no necessary to repair.

Only valid for the unit without E-heater.

Unit with E-heater will never show “LA”.

NOTE
The diagnostic codes listed above are the most common. If a diagnostic code not listed above is displayed, contact residential technical assistance referenceing the number on the front of this manual. If any of P3/P4/P2 continuously appear 3 times within single heating cycle,the third failure code do not disappear, system will consider it as heat pump system error.Contact a qualified person to service the unit.

17

7. MAINTENANCE
7.1 Maintenance

1. Check the connection between power supply plug and socket and ground wiring regularly;
2. In some cold area (below 0), if the system will be stopped for a long time, all the water should be released in case of freezing of inner tank and damage of E-heater.
3. It is recommended to clean the inner tank and E-heater every half year to keep an efficient performance.
4. Check the anode rod every half year and change it, if it has been used out. For more details, please contact the supplier or the after-sale service.
5. It is recommended to set a lower temperature to decrease the heat release, prevent scale and save energy if the outlet water volume is sufficient.
6. Clean the air filter every month in case of any inefficiency on the heating performance. In terms of the filter set in air inlet directly (namely, air inlet without connect with duct), the method of dismantle the filter is: anti- clockwise unscrew the air inlet ring, take out the filter and clean it completely, finally, remount it to the unit.
7. Before shutting the system off for a long time, please: Shut off the power supply; Release all the water in water tank and the pipeline and close all the valves; Check the inner components regularly.
8. How to change the anode rod Turn off the power, and turn off the water inlet valve.
   Open hot water tap, and decrease the pressure of the inner container.
   Open the drainage valve, and drain out the water, until there are no water flow out.
   Get off the anode rod.
   Replace with a new one, and make sure effective sealed.
   Open cold water inlet tap untill water flows out from outlet tap, then turn of water outlet tap.
   Power on then restart the unit.

7.2 Recommended regular maintenance table

Checking Item

Checking content

Checking frequency

1

air filter (inlet/outlet)

every month

Table.7-1 Action Clean the filter

2

anode rod

every half year

Replace it if it has been used out

3

inner tank

every half year

Clean the tank

4

E-heater

every half year

Clean E-heater

Operate the

hander of PT

PT valve

every half year

valve to ensure

5

that waterways

are clear.

If water doesn’t flow freely when operating the hander, replace PT valve with a new one

Anode Rod

Fig.7-1
18

8. SPECIFICATIONS
Model

Table. 8-1 RSJ-15/190RDN3-F(WF)

Water-heating cap.

1450W

Rated power/AMPS

3900W/17A

Power supply

220-240V~ 50Hz

Operation control Protection
E-heater power Refrigerant

Auto/Manual startup, error alarm, timer,etc Over-load Protector, Temp Controller&Protector, Electric Leakage Protector, etc
3150W
R134a(1000g)

Water pipeline system

Outlet water temp. Water side exchanger Inlet pipe Dia. Outlet pipe Dia.

Default 60°C,(38-70°C adjustable Safety condenser,copper tube wrapped around outside of storage tank
DN20
DN20

Drain pipe Dia. PT valve Dia. Max. operating pressure

DN20 DN20 1.0MPa

Exchanger air side

Material Motor power

Hydrophilic aluminum fin, inner groove copper tube 28W

Air circulation way

outlet/inlet vertically, duct connection available

Dimension Water tank cap.

560×1760mm 180L

Net weight

107kg

Fusible link type

T5A 250VAC

The test conditions: Ambient temperature 15/12°C(DB/WB), Water temperature from 15°C up to 45°C.

19

8.1 Important information for the used refrigerant
This product has the fluorinated gas, it is forbidden to release to air. Refrigerant type: R134A; Volume of GWP: 1430; GWP=Global Warming Potential

Model RSJ-15/190RDN3-F(WF)

Factory charge

Refrigerant/kg tonnes CO2 equivalent

1.00

1.43

Attention:
Frequency of Refrigerant Leak Checks

1. For equipment that contains fluorinated greenhouse gases in quantities of 5 tonnes of CO2 equivalent or more,but of less than 50 tonnes of CO2 equipment,at least every 12 months, or where a leakage detection system is installed, at least every 24 months.
2. For equipment that contains fluorinated greenhouse gases in quantities of 50 tonnes of CO2 equivalent or more,but of less than 500 tonnes of CO2 equipment,at least every six months, or where a leakage detection system is installed, at least every 12 months.
3. For equipment that contains fluorinated greenhouse gases in quantities of 500 tonnes of CO2 equivalent or more,at least every three months, or where a leakage detection system is installed, at least every six months.
4. This air-conditioning unit is a hermetically sealed equipment that contains fluorinated greenhouse gases.
5. Only certificated person is allowed to do installation, operation and maintenance.

20

MD14IU-029JX[190] OEM
16125300A12452 20220725

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