Gondzik NL-BKDX30-95II/R User manual

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CONTENT
I. Prologue.................................................................... 4
II. Main instruction of product.....................................6
III. Installation............................................................ 11
IV. Trial running.......................................................... 20
V. Operation panel instruction...................................21
VI. Maintenance & Repair..........................................36

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Please read this manual carefully before installation
◆The heat pump unit must be installed by the professional technician.
◆Please install the heat pump and connect the water pipes in accordance with this manual strictly.
◆For safety consideration, please make sure to re-check that everything before the power on.
◆If the machine with any improvement, the content is subject to change without notification.
Please Read the Manual Carefully before Operation

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I. Prologue
Thanks for choosing Nulite New Energy brand heat pump for your heating cooling or sanitary hot water solutions!
Please read this manual carefully before installation and operation! This manual contains the information about
installation, electrical debugging, operation, and maintenance. The following items should be focused:
1. Before installation, please confirm if your local voltage supplying matches with the voltage which showed on
the machine's nameplate and if the carrying capacity of the power supply, wires and plug bases are suitable for
the range of this machine's input power.
2. Users are not allowed to change the power line or plug base by themselves. All wiring works must be carried
out by a qualified electrician, please 100% be sure to connect the earth line correctly. If the earth wiring is not
connected correctly, it may cause electric shock accidents.
3. After the completion of the construction of all wiring work, please make sure to recheck that everything is well
connected before power on.
4. Installing the machine in the place which the combustible gas may leak is strictly forbidden.
5. Do not put your hands or foreign matters into the air outlet of heat pump unit, otherwise it will be dangerous to
the people and equipment nearby.
6. In order to obtain a better energy-saving effection, the unit should be installed in a place with well-ventilated.
ATTENTIONS:
1. Please make sure the water circulation system filled with enough water before the machine starts working.
2. When the machine is under operating, all valves of the water systems must be in the open positions.
3. If without inlet water or with a long time stopped using, when re-boot the machine, please refer to the item of
attentions 1.
4. A removable filter must be installed at the water inlet and please clean the valve periodically depend on your
locate water quality (every 2 or 3 months).
5. The maximum water temperature is 55℃, at hot water heating mode, please adjust the water
temperature to a appropriate temperature (The most comfortable water temperature for shower is 38C~42C , if
the water temperature above 50℃, there might be with danger of burning skin!)
6. The maintenance of the machine must be carried out by professional electricians.
7. When the unit get powered off, please discharge all the water inside the water circulation system. Otherwise
the heat exchanger might be frozen at cold ambient temperatures.
8. Please confirm the installation location of the main controller. When installing the main controller, be sure to
install it in a waterproof place, and the installation must be firm.

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9. Please install with leakage protection switch. Check whether a leakage protection switch of suitable power is
installed between the unit and the power supply, if the leakage protection switch is not installed, it may cause
electric shock or fire.
10. Check the water flow and pressure of the circulating water of the equipment when the equipment is at
normal use, it must be ensured to prevent the unit from being protected and running short of water.
11. Do not move the detector freely. The temperature detector must not be separated from the water tank
temperature detection blind pipe to avoid overheating of the unit heater and might cause the unit damaged.
12. The unit’s maintenance and repairing by non-professional technicians to repair or adjust the advanced factory
controlling setting of the unit by themselves are not allowed, please contact the local service providers or
distributors for the operation.
13. The fuse selection must match with the unit. It is forbidden to use corresponding fuse which is not suitable.
Otherwise it may cause system errors or cause a fire.
14. Prevent the unit from fire. Do not spray flammable spray directly to the unit, otherwise it may cause a fire
accident.
15. Please cut off the manual power switch immediately when an abnormality (with burnt smell) occurs, stop any
further operation, and contact the local service providers or distributors.
If the abnormal operation continues, it may cause electric shock or fire.
16. Emergency measures after out of water or electricity supplying,
In cold areas, please do not cut off the water and power supply to avoid freezing the heat exchanger and the
water circulation system. In the event of a power failure, please drain all the cold water out of the heat exchanger
and the whole water circulation system, otherwise the heat exchanger will be damaged by freezing and the unit
cannot be used normally.
It is recommended with a condensed water drain pipe installed during engineering installation to prevent a large
amount of condensate water from flowing to the ground during drainage and causing large areas of water to
accumulate.

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II. Main instruction of product
1. Parameter
Model
Size(L*W*H mm)
Net Weight(KG)
Power Supply
NL-BKDX30-95II/R
996x470x1000
100
220V～Inverter~1N
NL-BKDX40-150II/R
996x470x1000
110
380V～Inverter~3N
NL-BKDX50-200II/R
996×470×1385
150
380V～Inverter~3N
NL-BKDX60-220II/R
996×470×1385
155
380V～Inverter~3N
NL-BKDX80-300II/R
1196×568×1386
175
380V～Inverter~3N
NL-BKDX100-400II/R
1196×568×1386
185
380V～Inverter~3N
NL-BKDX50-200II/R32
996×470×1385
150
380V～Inverter~3N
2. Appearance
NL-BKDX30-95II/R & NL-BKDX40-150II/R

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NL-BKDX50-200II/R & NL-BKDX60-220II/R & NL-BKDX50-200II/R32

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NL-BKDX80-300II/R & NL-BKDX100-400II/R

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3.Specifications
Unit
DC Inverter Monoblock Heat Pump 3 in 1
All In One Type
Model
NL-BKDX30-95II/R
NL-BKDX40-150II/R
NL-BKDX50-200II/R
Waterproofing grade
IPX4
IPX4
IPX4
Leakage protection
ⅠClass
ⅠClass
ⅠClass
Power source
220V-50Hz-1N
220V-1N/50Hz
380V-3N/50Hz
220V-1N/50Hz
380V-3N/50Hz
Hot water capacity
2500-9500W
3800~15500W
4000-19400W
Heating capacity
2800-10000W
3500~15000W
4500-20000W
Cooling capacity
2500-7000W
3800~10000W
4500-14000W
Heating input power
1000-3000W
1500~4500W
2000-5500W
Hot water input power
1000-3000W
1500~4500W
2000-5500W
Cooling input power
1000-3000W
1500~4500W
2000-5500W
Auxiliary element power
3000W
3000W
3000W
Auxiliary element current
14A
14A
14A
Rated input power
2420W
3600W
3600W
4500W
4500W
Rated current
10.8A
14.5A
6.4A
21A
7.8A
Water pump
WILO RS25/8
WILO RS25/8
WILO RS25/8
Max water pump head
8 meters
8 meters
8 meters
Expansion tank
2L
2L
5L
Rated water flow
1.8m3/h
2.7m3/h
3.5m3/h
Refrigerant
R410A/1600g
R410A/2100g
R410A/2800g
Net weight
100kg
110kg
150kg
Noise
≤49dB(A)
≤50dB(A)
≤52dB(A)
Inlet/outlet gas max
working pressure
4.2MPa
4.2MPa
4.2MPa
High/low pressure max
working pressure
4.2MPa
4.2MPa
4.2MPa
Heat exchanger max
working pressure
4.2MPa
4.2MPa
4.2MPa

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Unit
DC Inverter Monoblock Heat Pump 3 in 1
All In One Type
Model
NL-BKDX60-220II/R
NL-BKDX50-200II/R32
NL-BKDX80-300II/R
NL-BKDX100-400II/R
Waterproofing
grade
IPX4
IPX4
IPX4
IPX4
Leakage
protection
ⅠClass
ⅠClass
ⅠClass
ⅠClass
Power source
380V-50Hz-3N
220V-1N/50Hz
380V-3N/50Hz
380V-50Hz-3N
380V-50Hz-3N
Hot water
capacity
5600-22000W
5500-21000W
7000-29500W
9000-40000W
Heating
capacity
5200-21500W
4500-20000W
7200-30000W
8000-39000W
Cooling
capacity
5200-15000W
4800-14500W
7000-23000W
9000-30000W
Heating input
power
2500-6600W
2000-5500W
3200-8300W
4000-10000W
Hot water
input power
2500-6600W
2000-5500W
3200-8300W
4000-10000W
Cooling input
power
2500-6600W
2000-5500W
3200-8300W
4000-10000W
Auxiliary element
power
3000W
3000W
/
/
Auxiliary
element
14A
14A
/
/
Rated input
power
5000W
4500W
6500W
8000W
Rated current
8.8A
21A/7.8A
12.8A
18A
Water pump
WILO RS25/8
WILO RS25/8
/
/
Max water
pump head
8 meters
8 meters
/
/
Expansion
tank
5L
5L
5L
5L
Rated water
flow
3.8m3/h
3.5m3/h
4.8m3/h
7m3/h
Refrigerant
R410A/3200g
R32/2800g
R410A/3600g
R410A/3900g
Net weight
155kg
150kg
175kg
185kg
Noise
≤52dB(A)
≤52dB(A)
≤58dB(A)
≤59dB(A)

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III. Installation
1. Heat pump installation
(1) Installation location
◆The heat pump must be installed exclusively outside the home and, where possible, in a completely
clear area. If a protection is needed around the appliance, it should have wide openings on the 4 sides
and the installation separations indicated in the following figure must be respected. No obstacle should
prevent the circulation of air through the evaporator and the fan outlet.
Inlet/outlet
gas-max
working
pressure
4.2MPa
4.2MPa
4.2MPa
4.2MPa
High/low
pressure-max
working
pressure
4.2MPa
4.2MPa
4.2MPa
4.2MPa
Heat
exchanger
max working
pressure
4.2MPa
4.2MPa
4.2MPa
4.2MPa

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◆Consult with the user before choosing the location of the device. It should not be placed next to
sensitive walls,such as on the wall next to a bedroom. Make sure that the location of the heat pump is not
disruptive to neighbor (sound level, air currents generated, low temperature of the air blown with risk of
freezing plants in the path, etc.).
◆Choose a location that preferably has sunlight and is protected from strong and cold winds. If the heat
pump is exposed to gusts of wind that make it possible to overturn it, it should be supported by suitable
guys,as indicated in the figure.

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◆The device must be sufficiently accessible for subsequent installation and maintenance work. Make
sure that the passage of the hydraulic and electrical connections to the interior of the house is possible
and comfortable. The spacing measures indicated in the figure above are those strictly necessary to
ensure correct operation of the device; however, sometimes, it will be essential to provide more space for
maintenance work.
◆The heat pump is a device specially designed for outdoor installation. Nevertheless, avoid installing it in
a place where it may be exposed to significant water stains or spills (e.g. under a faulty gutter, near gas
outlets,etc.) . Move the appliance away from heat sources and flammable products.
◆In areas where abundant and copious snowfalls occur, special care must be taken to protect the heat
pump from possible obstructions due to accumulation of snow around it. The obstruction of the air inlet
and/or outlet of the machine due to the accumulation of snow may cause malfunction of the unit and
possible breakdowns. The heat pump must be raised at least 100 millimeters above the maximum
expected snow level. In turn, the roof should be protected from accumulation of snow, by means of a roof
projecting from the building or a similar structure.
2.Hydraulic installation
◆The hydraulic installation must be made by qualified installers.
2.1 Selection circulation pipeline：The water flow velocity inside the water pipe is generally required to
be 0.8~1.5m/s. The maximum water flow velocity cannot exceed 2m/s.
Determine the diameter of the water pipe according to the rated water flow of the machine. As shown in
the table below：
Water flow（m³/h）
≤1
1~2
2~3
3~4
4~5
Recommended pipe diameter(mm)（flow velocity 1.2m/s ）
DN20
DN25
DN32
DN40
DN40
Minimum pipe diameter(mm)（flow velocity1.8m/s ）
DN15
DN20
DN25
DN32
DN32

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2.2 Calculation of water pipe resistance：H max=P1+P2
◆Water pressure drop inside the machine. Can be found on the machine’s nameplate.
◆Water pressure drop in piping system. If the water flow velocity is 1.2m/s, the resistance of the
straight pipe is 0.6 Pa/m, and the resistance of each elbow is 2Pa.If the water flow velocity is 1.8m/s, the
resistance of the straight pipe is 1.25 Pa/m, and the resistance of each elbow is 4.5Pa.
2.3 Pump selection
◆According to the rated flow of the machine and the calculated water pressure drop.To decide if you
need to install an additional circulating water pump.
2.4 Installation of floor heating
◆The water flow speed in the fool heating pipe is not less than 0.25m/s, and the general design
is 0.25~0.5m/s.
◆The distance between the pipes is 150~200mm;
◆The length of each loop does not exceed 80m,and the general designed is about 40~70m.
The length difference between different loops does not exceed 10m.
3.Installing a DHW tank
◆The heat pump may include (optionally) in its installation a tank for the production of domestic
hot water. The hydraulic installation of the tank must be made by qualified personnel, subject
to the applicable installation legislation and attached instructions of the tank.
◆To combine an DHW tank with the heat pump, insert the DHW tank sensor supplied with it into the tank
sensor housing. In addition, a 3-way diverter valve (G1) must be installed between the external machine
and the DHW + heating/cooling installation, by means of what, the electronic controller diverts the water
from the heat pump to the DHW production or to the heating/cooling installation, depending on whether
there is demand for DHW.

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◆In addition,optionally,a backup heater (E1) can be installed, by means of what DHW
temperatures higher than 50℃can be obtained.
As alternative to the backup heater, the heat pump optionally allows the connection of a conventional
source of energy (as a gas boiler, oil boiler, etc.) as back up for DHW production, by means of the same
electrical connection E1. For it, the DHW tank must be provided with an auxiliary coil exchanger and/or
any intermediate system of exchange that allows the hydraulic connection of the above mentioned
backup source of energy.
To perform the electrical installation of the DHW tank sensor, the 3-way valve (G1), and the backup heater
or boiler(E1), read the “Electrical Connections” section of this manual carefully.

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4.Main components and working principle of water circulation system
4.1 pump: push the water circulate in the water circulation system to realize the heat exchange between
the heat pump and the water terminus.
4.2 Filter: Collect impurities in the water system to prevent impurities from entering the heat pump and the
water terminus’s heat exchanger to cause blockage.
4.3 Buffer tank: Increase the amount of water in the system,reduce the change rate of water temperature,
improve comfort; balance the different temperature difference and flow demand between the heat pump
and the water terminus.
4.4 Safety valve: keep the pressure of the water system not exceeding the maximum limit.
4.5 Expansion vessel: balance the pressure of the water system when the volume of water changes.
4.6 vent: remove the air in the water system and ensure that the water cycle is normal.
5.Estimate the heat demand for room heating
Q=K*qn*S
Q Total heat demand for housing
K Additional factor
qn Heat demand per square metre
S Heating area
5.1 qn experience values for different houses
Apartment（W/m²）
Single house（W/m²）
Living room
100~130
Living room
120~150
Bedroom
110~140
Bedroom
120~150
Study room
100~120
Study room
110~130
5.2 Additional factor
Ratio of heating area to total
room area
>0.55
0.4~0.55
0.25~0.4
<0.25
Additional factor K
1.0
1.25
1.35
1.5
The rated heating capacity of the heat pump must be ≥Q.
6.Calculation and selection of buffer tank
6.1 Minimum water volume in the water system
Considering the comfort of heating, it is best not to reduce the temperature of the water supply by more
than 5℃during the defrosting in winter. The general defrosting time is about 4 minutes.
Mmin=Q*T*2*1000/(60*5*1.163）

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Mmin Minimum water volume in the water system（L）
Q The rated heating capacity of the heat pump(KW)
T The defrosting time（minute）
M2 Total volume of other parts in the system except the buffer tank
6.2 The volume of the buffer tank must be ≥Mmin-M2
6.3 If M2>Mmin,It is not necessary to install a buffer tank。
6.4 For the correct operation of the heat pump, a minimum water volume must be ensured
in the installation, as well as a minimum flow in the hydraulic circuit of the machine.
If the minimum circulation flow is not reached by the heat pump, it will be blocked, and an alarm code will
be displayed on the controller display. According to the different capacity model installed, these volume
will be as below,
6.5 If the water volume of the installation is lower than this value, install a buffer tank in the
heating/cooling circuit. To avoid condensation and premature deterioration of the buffer tank, make sure
that all hydraulic fittings and connections are properly insulated, especially when the tank is to be used in
Cooling mode.
6.6 In multi-zone installations managed by thermostatic or similar valves, some method must be provided
to maintain the minimum flow rates indicated above, even when all zones are closed (bypass valve, etc.).

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7.Connection diagram

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Attentions
◆Construction wiring must be installed by a professional technician for construction in accordance with
the circuit diagram.
◆Appliance installation wiring should be installed in accordance with national wiring rules.
◆Before installation, please confirm whether your local voltage is match with the voltage showed on the
machine’s nameplate and whether the carrying capacity of the power supply, wires and sockets are
suitable for this machine’s input power.
◆The power source wire diameter is selected by the nameplate maximum current.
◆The regulation of insurance tube: according to the reality.
◆Users are not allowed to change the power cord, wiring work must be carried out by qualified
electricians, and to ensure that the machine metal parts has a good connection with grounding, the
machine shall not be allowed to change the grounding method. The electrical connection of the heat
pump must be protected by an earth leakage circuit breaker (a high-speed switch of 30 mA (<0.1s)).
◆The power connection must be equipped with the unit matching and at least 3mm contact with the
power from the all-pole disconnect device and leakage protection device.
◆If the power soft wire is damaged, it must be replaced by the manufacturer, its service department, or
similar professional to avoid danger.
◆Do not insert hands or foreign objects into the outlet of the unit, which will lead to the danger of
personnel and equipment.
◆The remote controller is fixed by screw and installed indoor with the height above 1.5M. It is forbidden
to install in the environment where the humidity, rain, acidity, corrosivity and light illuminate directly.
◆The water quality of the unit must meet the national standard of domestic water consumption, otherwise
it will cause the machine damage, the company does not bear any responsibility.
IMPOTTANT: Before carrying out any work on the electrical installation of the heat pump, always ensure
it is disconnected from the mains.

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IV. Trial running
1.Trial running must after all the installation completed.
2.Please confirm the following matters before the trial operation, put “√”in the boxes after
confirmation
▲ Unit is installed correctly
▲ Power supply meets unit’s rated power source need
▲ Piping and wiring are correctly installed
▲ Unit air inlet/outlet well-ventilated
▲ Drain off water is done well
▲ Leakage protective device act effectively
▲ Pipe thermal insulation
▲ Grounding wire connected correctly
3.After check and ensure correct, then power on. If the control panel display nothing, that should
recheck and tight the line of control panel. The control panel should display time, setting
temperature and the current temperature.
4.Discharge the air out of the pipelines , and then press ON/OFF button, the unit work under the
setting temperature, unit’s trial running would check the following:
▲ First time to run the device, check the current normal or not;
▲ The function keys on operation panel are normal or not;
▲ The indicator light is normal or not;
▲ The whole circulating hot water system has water leakage or not;
▲ The condensed water discharge is normal or not;
▲ System’s pressure is normal or not (according to the high water temperature or low
pressure);
▲ Whether there is abnormal sound and vibration during operation;
▲ The wind, sound and condensate of the unit affect the neighborhood or not;
▲ Whether there is leakage of refrigerant.