EcoSpring RSJ-35/300RD N3 User manual

Technical Manual
EcoSpring Combo Type Heat Pump Water Heater
EcoSpring ES300+
Applicable Model: RSJ-35/300RD N3
EcoSpring reserves the right to discontinue, or change
specification or designs at any time without notice and without incurring obligations.

EcoSpring Combo Type RSJ-35/300RDN3 Technical Manual
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Content
1. GENERAL INFORMATION ...............................................................................................3
1.1 Measurements................................................................................................................3
1.2 External appearance......................................................................................................3
1.3 Nomenclature.................................................................................................................3
2. COMBO TYPE HEAT PUMP WATER HEATER................................................................4
2.1 Features..........................................................................................................................4
2.2 Refrigerant circuit..........................................................................................................5
2.3 Unit structure .................................................................................................................6
2.4 Specifications ................................................................................................................7
2.5 Dimension ......................................................................................................................8
2.6 Performance data ..........................................................................................................9
2.7 Wiring diagram.............................................................................................................11
2.8 Installation....................................................................................................................12
2.9 Water affusion and effusion........................................................................................20
2.10 Trial run ......................................................................................................................21
2.11 Maintenance ...............................................................................................................22
2.12 Trouble shooting........................................................................................................24
2.13 Function .....................................................................................................................31
2.14 Operation....................................................................................................................33
2.15 Accessories................................................................................................................40
2.16 Resistance characteristic of temperature sensor...................................................41

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1. General Information
1.1 Measurements
Model Net/Gross weight (kg) Dimension (mm, D×H) Power Supply
RSJ-35/300RDN3 144.5/173.5 Ф650×1920 220-240V~, 50Hz, 1Ph
1.2 External appearance
1.3 Nomenclature
RSJ - 35 / 300 R D N3
Refrigerant Type
N3: R134a
Function
D: E-Heater
Refrigerant Cycle-heating Type
Water Storage (Unit: L)
Heating Capacity (Unit: ×100W)
EcoSpring Heat Pump Water Hea
ter

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2. Combo Type Heat Pump Water Heater
2.1 Features
Safety
1. Complete isolation between water and electric circuits.
2. No fuel tubes and storage, no potential danger from oil leakage, fire, explosion, and so on.
3. No cross contamination potential, the condenser coil is wrapped around the enamel inner tank.
4. Multi protection: Pressure and temperature relief (PTR) valve, Temperature cut off (TCO) and
Auto temperature cut off (ATCO) double high water temperature protection switches.
Enamel tank
RSJ-35/300RDN3 adopts enamel water tank. Water and s t eel ta nk are completely isolated by enamel
layer.
Certification
RSJ-35/300RDN3 has received StandardsMark certificate and WaterMark certificate.
The maximum outlet water temperature: 60°C.
Water in the tank is heated safely and quickly by the combination of the electric heating and heat
pump heating.
Automatic control
Automatic running mode selection, automatic startup and shutdown, automatic weekly disinfection
and automatic defrosting by revising refrigerant cycle to save the extra operation.

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High efficiency
According to the heat pump principle, the unit absorbs heat from outdoor air to produce hot water.
Coefficient of performance (COP) is up to 3.76 (Under the condition A15/12°C W15/45°C).
Wide operation range
Within the temperature range from -20°C to 43°C, the unit will not be affected by night, cloudy sky,
rain even snow weather.
2.2 Refrigerant circuit
Compressor: PJ250M2C-4FT, R134a rotary compressor, supplied by GMCC.
Evaporator: copper tube and aluminum fin type heat exchanger.
EXV: electronic expansion valve, the opening is regulated according to the discharge air temperature
of compressor.
Condenser: copper tube wrapped around the inner water tank.
Fan: centrifugal fan with three speeds. The motor is supplied by Welling.
High Pressure Switch: When the discharge pressure of compressor is 2.76Mpa or higher, the
protection switch will be triggered, and if the discharge pressure is down to 2.07MPa, the protection
switch will be recovered.
E-heater: SRG-346-3000, located in the mid of tank, 3000W/220VAC.
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2.3 Unit structure
Notes:
1. All the pictures in this manual are for explanation purpose only. They may be slightly different from the heat pump water
heater you purchased (depending on model).
2. Raincover should be purchased by the client for outdoor installation.
3. When ordering repair parts please always give the following information:
1) Model, serial and product number.
2) Parts name.
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2.4 Specifications
Model RSJ-35/300RDN3
Heat source Heat pump E-heater
Running ambient temperature -7〜43 -20〜43
Output water temperature Default 60°C, 38°C〜60°C
Power supply Ph, V, Hz 1, 220-240~, 50
Storage size Ltr 300
Water heating
Capacity kW 3.00
COP kW/kW 3.76
Max. current A 18.7
Unit
Dimension (D×H) mm Ф650×1,920
Packing (W×H×D) mm 750×2,150×780
Net/gross weight kg 144.5/173.5
Sound pressure level dB(A) 48
Sound power level dB(A) 60
Refrigerant type/quantity kg R134a /1.2
Refrigerant design pressure MPa 3.0/1.2
Throttling type Electric expansion valve
System protection TCO, ATCO, PTR valve, automatic defrosting, over-load
protector, high-pressure protector, etc.
Air flow m³/h 414/355/312
Compressor
ModelPJ250M2C-4FT
Type Rotary
Brand GMCC
Capacity W 3000/3005
Input kW 1.000/1.025
Rated current(RLA) A 4.1/5.0
Locked rotor Amp(LRA) A 26.5
Thermal protector IOL (Internal)
Capacitor 35μF
Refrigerant oil ml 480 (ESTEL OIL VG74)
Evaporator coil
Number of rows 3
Tube pitch(a)x row pitch(b) mm 22×19.05
Fin spacing mm 1.6
Fin type (code) Hydrophilic aluminum
Tube outside dia. and type mm φ7.94 Inner groove copper tube
Coil length x height mm 482×352
Number of circuits 4
Fan motor
Model YDK30-6R
Brand Welling
Input W 68/56/50
Speed r/min 620/530/465
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°C
°C

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Locked rotor Amp(LRA) A 0.35
Capacitor 2.5μF/450V
Water pipeline
Water inlet pipe DN20
Water outlet pipe DN20
Drainage pipe DN20
PTR valve joint DN20
Max. operating pressure MPa 1.0
Water side heat exchanger Dividing wall type heat exchanger
E-heater kW 3.00×1
Hot water yield m³/h 0.086
Loading Quantity 20'/40'/40H Pcs 21/45/45
Notes:
1. The test conditions: outdoor temperature 15/12°C (DB/WB), inlet water temperature 15°C, outlet water
temperature 45°C.
2. Sound pressure value test conditions: four sidesof the unit, distance is 1m, and height is 1m + half of the unit’s
height. The sound pressure level is following this procedure:
3. The specification may be changed for product improvement, please refer to the nameplate.
2.5 Dimension
Unit: mm
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2.6 Performance data
Running mode will be automatically selected by unit. It cannot be selected by manual operation.
Running Temperature Range:
Setting water temperature target range: 38~60°C.
E-heater running ambient temperature range: -20~43°C.
Heat pump running ambient temperature range: -7~43°C.
Water temperature limits:
Unit:°C
Ambient Temp. (T4) T4≤-7 -7≤T4<-2 -2≤T4<2 2≤T4<7 7≤T4<43 43≤T4
Max. Temp. (Heat pump) - 42 47 55 60 -
Max. Temp. (E-heater) 60 60 60 60 60 60
When ambient temperature is below 2°C, heat pump and E-heater will take different portions of heating
capacity. In general, the lower ambient temperature, the lower portion the heat pump will contribute
as well as the higher portion the E-heater will provide.More detail please refer to the above table.
The data between heat-up time and ambient temperature
Heat-up time (h) Water outlet temperature ( )
Ambient Temp. ( ) 45 50 55 60
-20 1.8 2.1 2.4 2.7
-10 1.8 2.1 2.4 2.7
-6 6.6 6.9 7.2 7.5
0 5.9 6.3 6.6 7.0
2 5.5 6.5 7.4 7.7
7 4.6 5.4 6.2 6.4
15 3.3 4.0 4.6 5.3
20 3.1 3.6 4.2 4.8
25 2.8 3.3 3.8 4.4
30 2.4 2.9 3.4 3.9
32 2.4 2.8 3.2 3.7
35 2.3 2.7 3.2 3.6
40 2.3 2.7 3.2 3.6
43 2.2 2.6 3.0 3.1
°C
°C
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The data between capacity and ambient temperature
Capacity (W) Water outlet temperature ( )
Ambient Temp. ( ) 45 50 55 60
-20 3100 3100 3100 3100
-10 3100 3100 3100 3100
-6 1455 1519 1596 1675
0 1709 1744 1805 1854
2 1817 1811 1809 1842
7 2158 2159 2170 2202
15 2992 2952 2900 2856
20 3282 3240 3185 3135
25 3596 3533 3475 3421
30 4093 4030 3963 3899
32 4250 4182 4114 4051
35 4374 4304 4233 4169
40 4298 4262 4212 4158
43 4592 4534 4475 4418
The data between COP and ambient temperature
COP Water outlet temperature ( )
Ambient Temp. ( ) 45 50 55 60
-20 0.99 0.99 0.99 0.99
-10 0.99 0.99 0.99 0.99
-6 1.90 1.75 1.67 1.60
0 2.28 2.12 1.96 1.81
2 2.40 2.33 2.25 2.07
7 2.872.78 2.69 2.45
15 3.763.59 3.40 3.23
20 4.023.83 3.62 3.43
25 4.334.10 3.88 3.67
30 4.78 4.53 4.28 4.03
32 4.96 4.70 4.44 4.19
35 5.07 4.80 4.53 4.27
40 5.04 4.80 4.56 4.31
43 5.31 5.05 4.78 4.52
COP varies at different ambient temperatures. Normally lower ambient temperaturesresult in longer
heat-up time because of lower effective performance. While the ambient temperature is below
-7°C, heat pump efficiency will decrease dramatically, the unit will automatically shift to E-heater
running.
°C
°C
°C
°C
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2.7 Wiring diagram
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2.8 Installation
2.8.1 Transport
In order to avoid scratch or damage of the unit surface, apply guard boards to the
contacting surface. Don’t incline the unit more than 75° whilst moving, and keep it vertical
when installing.
This unit is heavy, it needs to be carried by two or more persons,otherwise
injury and damage may result.
2.8.2 Location of installation
Location requirements
Enough space for installation and maintenance shall be preserved.
The air inlet and outlet should be free from obstacles and strong wind.
The base surface should be flat, which 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.
The operation noise and air flow expelled should not affect neighbors.
No flammable gas is leaked nearby.
It is convenient for piping and wiring.
If the unit has to be installed in the indoor space, the unit might cause indoor temperature
decrease and noise, please take preventive measures for this.
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.
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The ambient air temperature must also be considered when installing this unit, in heat
pump mode the ambient air temperature must be above -7°C and below 43°C.Ifthe
ambient airtemperature falls outside the limits, the electrical elements will activate to meet
the hot water demand and the heat pump will 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 against freezing.
If installed in enclosed space, the water heater must be located in a space >15m³, and
must have unrestricted air flow. As an example, a room that has a 2.5 meters tall ceiling
and is 3 meters long by 2 meters wide would contain 15m³.
Maintenance space requirements
Unit: mm
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2.8.3 Water system piping
In case of installing the unit at a place where outside temperature isbelow freezing point,
insulation must be provided for all hydraulic components.
Water inlet or outlet pipes: The specication of the water inlet or outlet thread is RC3/4”,
which is external thread. Pipes should be heat-insulated well.
Installation of the pipe for PTR valve: The specification of the valve connecting thread is
RC3/4” ,which is internal thread. After installation, it must be confirmed that the drainpipe
outlet is exposed in the air.
Installation of the one way valve: The specification of the valve thread in accessories is
RC3/4”. It is used to prevent water from flowing backwards.
The drainage pipe should be insulated to prevent water inside pipe from freezing in cold
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weather.
After water system piping connection, turn on the inlet and outlet valve to effuse the tank.
When water flow is coming out from outlet pipe, the tank is full, turn off all valves to check
the pipeline leakage.
If the inlet water pressure is less than 0.15MPa, a pump should be installed at the water
inlet. If the water supply hydraulic is higher than 0.65MPa, a reducing valve should be
installed at the water inlet pipe.
Condensate may be leaked from unit if drainage pipe is blocked, so a drainage pan should
be installed as instruction below.
To smoothly drain condensate, the unit should be installed at a horizontal floor. Otherwise,
the drain vent is ensured at the lowest place, and recommending the inclination angle of
unit to the ground should be no more than 2°.
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2.8.4 Installation Outdoors
Raincover must be installed.
Filter needs to be installed at the air inlet position.
Notes:
When the rain cover is installed condensate will be generated around the outside of the rain cover.
Rain cover is needed to prevent water ingress.
For your safety, please do not take off the front decoration plate.
EcoSpring
Outside rain cover separates the
inlet and outlet air flow

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
2.8.5 Electric connection
The power supply should be hard wired.
Power supply circuit should be earthed effectively. The wiring must be performed by
professional technicians in accordance with national wiring regulations and the 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 relevant electric technical standards of
the state.
The power cord and the signal cord shall be laid out neatly and properly without mutual
interference or contact the connection pipe or valve.
After wire connection, check it again and make sure of connection before power is turned
on.
Specifications of power supply
Model name RSJ-35/300RDN3
Power supply 220-240V~, 50Hz
Min. diameter of power supply cord (mm2) 4
Earth cord (mm2) 4
Manual switch capacity (A)/Fuse (A) 40/30
Creepage breaker 30mA ≤0.1sec
Choosing the power cord according to above table, and it should comply with local electric
standard.
EcoSpring

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Switch setting
PCB has 2 bits of switches, do not change factory settings.
SW1 Model selection (Never allow user to alter the factory settings)
ON OFF
SW1-1 Without Electric Heater With Electric Heater
SW1-2 Without Disinfect With Disinfect
SW2 Model selection (Never allow user to alter the factory settings)
ON OFF
SW2-1 300L model 190L model
SW2-2 Power furquency_60Hz Power furquency_50Hz
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PCB I/O Ports description
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2.9 Water affusion and effusion
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.
Hot water outlet
Close
Water out
When water flows out from the water
outlet, the tank is full.
Turn off the hot
water outlet valve and water affusion
is finished.
Hot water outlet
Cool water inlet
Open
Open the cool water inlet and
hot water outlet
Open Water Affusion
Notes:
1. The Ball valve at water inlet should be open when the unit is in operation.
2. Operation without water in water tank may result in damage of auxiliary E-heater. Due to such
damage, the supplier is not responsible for the quality issue.
3. Over 50°C may result in serious burn or so caused death. Special care should be paid to the
children, the disabled and the old in case of water burn.
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