NEW ENERGY NERS-G50Y-B1 Service manual

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SWIMMING POOL HEAT PUMP UNIT
Installation & Instruction Manual
Please read this manual carefully before using and keep it in a safe place.

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DC INVERTER SWIMMING POOL HEAT PUMP
SERIES USER MANUAL
Please read this manual carefully before using and keep it in a safe place.
Contents
I. Unit Parameters.............................................................................................................................................. 1
II. System Specification..................................................................................................................................... 4
1. Specification............................................................................................................................................4
2. Unit Dimensions..................................................................................................................................... 8
3. Explosion View..................................................................................................................................... 10
III. Installation Instructions.............................................................................................................................. 11
IV. Running Test............................................................................................................................................... 16
1. Inspection Before Running Test.........................................................................................................16
2. Control Function Description..............................................................................................................16
V. Maintenance.................................................................................................................................................27
VI. Wi-Fi Model and APP User Manual.........................................................................................................28
1. Display................................................................................................................................................... 28
2. Wi-Fi Function...................................................................................................................................... 29

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I. Unit Parameters
1. Appearance
2. Statement
To keep users under safe working condition and property safety, please follow the instructions
below.
Wrong operation may result in injury or damage;
Please install the unit in compliance with local laws, regulations and standards;
Confirm power voltage and frequency;
The unit is only used with grounding sockets;
Independent switch must be offered with the unit.
3. The following safety factors need to be considered:
Please read the following warnings before installation;
Be sure to check the details that need attention, including safety factors;
After reading the installation instructions, be sure to save them for future reference.

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⚠Warning
Make sure that the unit is installed safely and reliably.
If the unit is not secure or not installed, it may cause damage. The minimum support weight
required for installation is 21g/mm2.
If the unit was installed in a closed area or limited space, please consider the size of room and
ventilation to prevent suffocation caused by refrigerant leakage.
Use a specific wire and fasten it to terminal block so that the connection will prevent pressure
from being applied to parts.
Wrong wiring will cause fire.
Please connect power wire accurately according to wiring diagram on the manual to avoid burnout of
the unit or fire.
Be sure to use correct material during installing.
Wrong parts or wrong materials may result in fire, electric shock, or falling of the unit.
Install on the ground safely, please read installation instructions.
Improper installation may result in fire, electric shock, falling of the unit, or water leaking.
Use professional tools for doing electrical work.
If power supply capacity is insufficient or circuit is not completed, it may cause fire or electric shock.
The unit must have grounding device.
If power supply does not have grounding device, be sure not to connect the unit.
The unit should be only removed and repaired by professional technician.
Improper movement or maintenance of the unit may cause water leakage, electric shock, or fire.
Please find a professional technician to do.
Don't unplug or plug power during operation.It may cause fire or electric shock.

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Don't touch or operate the unit when your hands are wet. It may cause fire or electric shock.
Don't place heaters or other electrical appliances near the power wire.It may cause fire or
electric shock.
The water must not be poured directly from the unit. Do not let water to permeate into the
electrical components.
4. ⚠Warning
Do not install the unit in a location where there may be flammable gas.
If there is flammable gas around the unit, it will cause explosion.
According to the instruction to carry out drainage system and pipeline work. If drainage system or
pipeline is defective, water leakage will occur. And it should be disposed immediately to prevent
other household products from getting wet and damage.
Do not clean the unit while power is on. Turn off power before cleaning the unit. If not it
may result in injury from a high-speed fan or electric shock.
Stop operating the unit once there is a problem or an fault code.
Please turn off power and stop running the unit. Otherwise it may cause electric shock or fire.
Be careful when the unit is not packed or not installed.
Pay attention to sharp edges and fins of heat exchanger.
After installation or repair, please confirm refrigerant is not leaking.
If refrigerant is not enough, the unit will not work properly.
The installation of external unit must be flat and firm.
Avoid abnormal vibration and noise.
Don’t put your fingers into fan and evaporator.
High speed running fan will result in serious injury.

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This device is not designed for people who is physically or mentally weak (including
children) and who does not have experience and knowledge of heating and cooling
system. Unless it is used under direction and supervision of professional technician, or
has received training on the using of this unit. Children must use it under supervision of
an adult to ensure that they use the unit safely. If power wire is damaged, it must be
replaced by a professional technician to avoid danger.
II. System Specification
1. Specification
Model
NERS-G50Y-B1
NERS-G70Y-B1
NERS-G90Y-B1
Air temperature: 26ºC, inlet / outlet water temperature: 26ºC/28ºC, Humidity 80%
Heating capacity（kW）
1.5～5.5
1.5～7.2
1.8～9.5
Power input （kW）
0.104～0.84
0.106～1.12
0.124～1.46
COP
6.55～14.4
6.43～14.2
6.5～14.5
Boost mode
Heating capacity（kW）
5.5
7.2
9.5
COP
6.55
6.43
6.5
Smart mode
Heating capacity（kW）
4.5
5.8
7.8
COP
7.41
7.53
7.52
Silent mode
Heating capacity（kW）
2.1
2.8
3.5
COP
12.2
12.5
12.2
Air temperature: 15ºC, inlet / outlet water temperature: 26ºC/28ºC,Humidity 70%
Heating capacity（kW）
1.1～3.9
1.3～5.4
1.5～7.9
Power input （kW）
0.138～0.75
0.168～1.102
0.194～1.491
COP
5.2～7.97
4.9～7.74
5.3～7.73
Boost mode
Heating capacity（kW）
3.9
5.4
7.9
COP
5.2
4.9
5.3
Smart mode
Heating capacity（kW）
3.1
4.3
6.1
COP
5.92
5.95
5.95
Silent mode
Heating capacity（kW）
2.2
2.4
2.5
COP
6.95
6.88
6.92

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Air temperature: 35ºC, inlet / outlet water temperature: 28ºC/26ºC
Cooling capacity（kW）
1.5～3.1
1.7～3.8
1.8～4.9
Power input（kW）
0.208～0.704
0.229～0.854
0.242～1.101
EER（kW）
4.4～7.2
4.45～7.42
4.45～7.44
Boost mode
Cooling capacity（kW）
3.1
3.8
4.9
EER
4.4
4.45
4.45
Smart mode
Cooling capacity（kW）
2.3
2.92
3.5
EER
5.64
5.63
5.63
Silent mode
Cooling capacity（kW）
1.8
2.18
2.4
EER
6.97
6.97
6.95
Power supply(V/Ph/Hz)
220-240V / 50Hz
Max power input(KW)
1.31
1.61
1.75
Max current(A)
5.95
7.32
7.95
Heating temperature range
15°C～40°C
Cooling temperature range
8°C～28°C
Running temperature range
-10°C～43°C
Advised swimming pool size
10m³～20m³
15m³～30m³
20m³～40m³
Refrigerant
type
Type
R32
Charged （Kg）
0.355
0.425
0.53
Compressor
MITSUBISHI ELECTRIC ( DC inverter）
Air side heat exchanger
Hydrophilic fin exchanger
Water side heat exchanger
Titanium tube heat exchanger
Water flow(m³/h)
2.2～3.2
3.1～4.2
3.5～5.5
Net dimension LxWxH (mm)
880×353×618
Packing dimension LxWxH (mm)
946×386×738
Water pipe
connection
Inlet
G1-1/2”
Outlet
G1-1/2”
Net weight （kg）
33
37
39
Gross weight （kg）
40
43
46

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Noise level dB(A)
20～45
20～46
21～46
The technical specification of our heat pumps is provided for information purpose only. We reserve
the right to make change without notice in advance.
1. Ambient temperature
2. Initial water temperature
3. Noise at 1m, 4m and 10m comply with Directives EN ISO 3741 and EN ISO 354
4. Calculate according to an in-ground private swimming pool covered with bubble
Model
NERS-G110Y-B1
NERS-G150Y-B1
NERS-G180Y-B1
Air temperature: 26ºC, inlet / outlet water temperature: 26ºC/28ºC ,Humidity 80%
Heating capacity（kW）
2.8～11.5
3.5～15.3
4.35～18
Power input （kW）
0.193～1.79
0.243～2.41
0.306～2.83
COP
6.4～14.5
6.35～14.4
6.36～14.2
Boost mode
Heating capacity（kW）
11.5
15.3
18.0
COP
6.4
6.35
6.36
Smart mode
Heating capacity（kW）
9.1
11.55
14.01
COP
7.82
7.68
7.5
Silent mode
Heating capacity（kW）
5.5
7.35
8.7
COP
11.2
10.62
10
Air temperature: 15ºC, inlet / outlet water temperature: 26ºC/28ºC,Humidity 70%
Heating capacity（kW）
2.21～8.23
2.95～11.15
3.42～13.33
Power input （kW）
0.283～1.614
0.386～2.226
0.453～2.693
COP
5.1～7.81
5.01～7.64
4.95～7.55
Boost mode
Heating capacity（kW）
8.23
10.86
13.33
COP
5.1
5.01
4.95
Smart mode
Heating capacity（kW）
6.58
8.65
10.55
COP
5.73
5.72
5.68
Silent mode
Heating capacity（kW）
4.37
5.55
6.72
COP
6.57
6.55
6.51

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Air temperature: 35ºC, inlet / outlet water temperature: 28ºC/26ºC
Cooling capacity（kW）
2.42～6.3
3.35～7.95
4.11～9.82
Power input（kW）
0.327～1.438
0.452～1.811
0.556～2.278
EER（kW）
4.38～7.4
4.39～7.41
4.31～7.39
Boost mode
Cooling capacity（kW）
6.3
7.95
9.82
EER
4.38
4.39
4.31
Smart mode
Cooling capacity（kW）
4.89
6.45
7.77
EER
5.42
5.45
5.36
Silent mode
Cooling capacity（kW）
3.12
4.15
4.88
EER
6.69
6.71
6.55
Power supply(V/Ph/Hz)
220-240V / 50Hz
Max power input(KW)
2.3
3.2
3.9
Max current(A)
10.5
14.5
17.7
Heating temperature range
15°C～40°C
Cooling temperature range
8°C～28°C
Running temperature range
-10°C～43°C
Advised swimming pool size
25m³～50m³
30m³～60m³
35m³～70m³
Refrigerant
type
Type
R32
Charged （Kg）
0.55
0.65
0.9
Compressor
MITSUBISH IELECTRIC ( DC inverter ）
Air side heat exchanger
Hydrophilic fin exchanger
Water side heat exchanger
Titanium tube heat exchanger
Water flow(m³/h)
4.1～6.2
5～7.2
6～8.2
Net dimension LxWxH (mm)
970×398×662
Packing dimension LxWxH (mm)
1036*416*782
Water pipe
connection
Inlet
G1-1/2”
Outlet
G1-1/2”
Net weight （kg）
44
47
52
Gross weight （kg）
53
56
61

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The technical specification of our heat pumps is provided for information purpose only. We reserve
the right to make change without notice in advance.
1. Ambient air temperature
2. Initial water temperature
3. Noise at 1 m, at 4 m and at 10 m in accordance with Directives EN ISO 3741 and EN ISO 354
4. Calculate according to an in-ground private swimming pool covered with bubble
2. Unit Dimensions
Model: NERS-G50Y-B1 , NERS-G70Y-B1, NERS-G90Y-B1
Noise level dB(A)
22～47
24～48
24～48

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Model: NERS-G110Y-B1, NERS-G150Y-B1, NERS-G180Y-B1

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3. Explosion View
1
Front plate
9
Framework
17
Right plate
2
Controller box
10
Compressor
18
Water flow switch
3
Fan motor cover
11
Middle plate
19
Evaporator
4
Fan
12
Four way valve
20
Protection net
5
Motor
13
Throttle valve
21
Inverter PC board
6
Motor support
14
Titanium heat exchanger
22
Electrical box
7
Left plate
15
Handle
23
Top cover
8
Chassis component
16
Cable port

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III. Installation Instructions
WARNING: Installation must be carried out by a qualified engineer.
This section is provided for information purpose only and must be checked and adapted if
necessary according to actual installation condition.
1. Pre-Requirements
Needed equipment for installation of heat pump:
Suitable power supply cable for unit’s power.
A by-pass kit and an assembly of PVC tube, stripper, PVC adhesive and sandpaper.
A set of wall plug and expansion screw.
We recommend to use flexible PVC pipe in order to reduce transmission of vibration.
Suitable fastening studs may be used to raise unit.
2. Location
Please comply with the following rules about heat pump location choosing.
1. The unit’s location must be convenient for operation and maintenance in the future.
2. It must be installed and fixed on flat concrete floor. The floor is stable to support the weight of the
unit.
3. A water drainage device must be provided close to the unit in order to protect the area where it is
installed.
4. If necessary, mounting pads could be used to support the weight of unit.
5. Confirm the unit is under well-ventilated condition; air outlet port is not facing to the windows of
nearby buildings and the outlet air can not be returned. In addition, provide enough space around the
unit for repair and maintenance.
6. The unit must not be installed in an area exposed to oil, flammable gases, corrosive products,
sulphurous compounds or close to high frequency equipment.
7. To prevent mud splashes, do not install the unit near road or track.
8. To avoid noise to neighbours, please make sure the unit is installed in less noise sensitivity area
or good sound isolation area.
9. Keep the unit as far as possible away from children.

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Anything could not be placed within 1m in front of heat pump.
Leave 50cm of empty space around the sides and rear of heat pump.
Do not put any stuff on or in front of heat pump!
3. Installation Layout
The heat pump is connected to a filtration circuit with a by-pass valve. The by-pass valve should be
half-opened (throttled), while all the other valves should be completely opened. We suggest to half
open by-pass valve to avoid excessive pressure on heat pump.
It is imperative that by-pass is placed after water pump and filtration. By-pass path usually consists of
3 valves. That makes it possible to adjust water flow which passes through heat pump and isolates
heat pump completely from any maintenance without affecting flow of filtration cycle.
The filter must be cleaned regularly to ensure that water in the system is clean and avoid blocking of
filter. It is necessary that drainage valve is fixed on the lower water pipe. If the unit is not running
during winter months, please disconnect power supply and let out drain water from unit through
drainage valve. If ambient temperature of running unit is below 0℃, please keep water pump
running.

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4. Parallel Installation for 2 Units
5. Electrical Connection
Power Supply Wires Size
Model
Power Supply Wires
Electricity Supply
Cable Diameter
Specification
NERS-G50Y-B1
220-240V/1N~50Hz
3×2.5mm
AWG 14
NERS-G70Y-B1
3×2.5mm
AWG 14
NERS-G90Y-B1
3×2.5mm
AWG 14
NERS-G110Y-B1
3×2.5mm
AWG 14
NERS-G150Y-B1
3×2.5mm
AWG 14
NERS-G180Y-B1
3×4.0mm
AWG 12
⚠WARNING: Power supply of heat pump must be disconnected before any operation.
Please comply with the following instruction to connect heat pump.
Step 1: Detach electrical side panel by a screwdriver to access electrical terminal block.
Step 2: Insert cable into heat pump unit port.
Step 3: Connect power supply cable to terminal block according to the diagram below.

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NERS-G50Y-B1,NERS-G70Y-B1,NERS-G90Y-B1,NERS-G110Y-B1

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NERS-G150Y-B1,NERS-G180Y-B1

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IV. Running Test
1. Inspection Before Running Test
a. Running test can begin after completing all installation;
b. Before running test, confirm below items and write √ in block;
Correct unit installation □
Power supply voltage is the same as unit rated voltage □
Correct piping and wiring □
Air inlet & outlet port of unit is unblocked □
Drainage and venting is unblocked and no water leaking □
Leakage protector is working □
Piping insulation is working □
Ground wire is connected correctly □
c. All wiring and piping should be connected well and carefully checked, then fill water tank with water
before power is switched on;
d. Emptying all air within pipes and water tank, press “on-off” button on control panel to run the unit at
setting temperature;
e. Items need to be checked during running test:
During the first running, unit current is normal or not;
Each function button on control panel is normal or not;
Display screen is normal or not;
Are there any leakage in the whole heating circulation system ;
Condensate drain is normal or not;
Are there any abnormal sound or vibration during running?
2. Control Function Description
2.1 Operation Description
Control Panel Diagram

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Basic Icons
1. When in heating mode, icon shows ；
2. When in Cooling mode, icon shows ；
3. When in defrosting mode, twinkling icon shows 。
When off status, the display shows the current time
Key Operating Instruction
1) “ ” On/Off Key:
When in other interface, press shortly, will go back to the homepage.
In the homepage, press this key to turn on/off
In the homepage, press this key for 5 seconds to set the timers, when ‘hour’ is flashing, you
can set hour of “Timer on”, the corresponding icon of “Timer on” flashes, press “ , ” to set
hour. Then, press key “ ” shortly to set minute of “Timer on”, press “ , ” to set minute.
After finishing setting, press key “Mode”to set hour of “Timer off”, the corresponding icon of
“Timer off” flashes, press “ , ” to change the value. After setting finished, press key “ ”
shortly to set minute of “Timer off”, press “ , ” to set minute. After setting, press key “ ”
and return to the homepage, if the relative light is on, it means that the corresponding timer is
set successfully.

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Timer Cancel
When the “Timer on”and “Timer off” is the same, timer will be canceled.
At the interface of setting “Timer on” or “Timer off”, press key “ ” for 5seconds, “Timer
on”or “Timer off” can be canceled individually.
When the relative light is off, it means this timer is canceled.
2) “ ” Mode Key：
When the heat pump is on, pressing this key shortly can shift different modes: heating mode,
cooling mode.
When the heat pump is off, press this key shortly to set the time, 4 nixie tubes are twinkling, at
this time, press key “ ” shortly to set the hour, press key “ , ”to change the hour. Then
press key “ ” shortly again to set the minute. When finishing, press key “ ”to return to
the homepage.
3) “ ”Plus Key
When the heat pump is on, in the homepage, press this key to increase the target
temperature.
When it’s in manual frequency mode, in the home page, press this key to increase the target
frequency.
4) “ ”Minus Key
When the heat pump is on, in the homepage, press this key to decrease the target
temperature.
When it’s in manual frequency mode, in the home page, press this key to decrease the target
frequency.
5) “ ” “POWERFUL” Key
When the heat pump is on, press this key shortly to enter into powerful mode.
6) “ ” “SMART” Key
When the heat pump is on, press this key shortly to enter into smart mode