Gree HLR8Pd/Na-K User manual

Change for life
Mini Chiller
Air Conditioners
Owner's Manual
eries
Thank you for choosing our air conditioners.
Please read this Owner’s Manual carefully before operation and retain it for future
reference.
If you have lost the Owner's Manual, please contact the local agent or visit www.
greeproducts.es or send an email to [e-mail] for the electronic
version.

Contents
1 Instruction to Users..................................................................................1
2 Safety Considerations .............................................................................2
3 Diagram of the Operating Principle .........................................................4
4 Operating Principle of the Unit.................................................................5
5 Nomenclature ..........................................................................................6
6 Installation Example .............................................................................7
7 Main Components .................................................................................10
8 Installation Guideline of the Unit............................................................12
9 Remote Air Temperature Sensor ...........................................................16
10 Thermostat ..........................................................................................17
11 2-Way Valve.........................................................................................17
12 Wired Controller .................................................................................18
13 Other Auxiliary Heat Sources .............................................................18
14 Gate-controller ...................................................................................18
15 Charging and Discharging of Refrigerant ............................................19
16 Electric Wiring......................................................................................20
17 Wring Diagram.....................................................................................22
18 Commissioning....................................................................................31
19 Daily Operation and Maintenance ......................................................33

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1 Instruction to Users
Thank you for choosing our mini chillers. Please read this manual carefully before installation and
use the unit correctly according to the following procedure.
◆After receipt of the unit, check it for appearance, unit model compared with your desire and
attachments.
◆For proper installation and future maintenance please read this Instruction and keep it carefully.
◆Design and installation work of the unit must be performed by authorized personnel according to
applicable laws and regulations and this Instruction.
◆After installation work, the unit cannot be energized unless there is not any problem in check.
◆Ensure periodical clean and maintenance of the unit after normal operation of the unit for longer
life and reliable operation.
◆For improvement of products, there should be not additional notice of amendment of the
contents.
Notice!
◆If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualied persons in order to avoid a hazard.
◆The appliance shall be installed in accordance with national wiring regulations.
Correct Disposed of this product
This marking indicates that this product should not be disposed with
other household wastes throughout the EU.To prevent possible harm to
the environment or human health from uncontrolled waste disposal,recycle
it responsibly to promote the sustainable reuse of material resources. To
retuern your used device,please use the return and collection systems or
contact the retailer where the product was purchased. They can take this
product for environmental safe recycling.
R410A(R32/125:50/50):2087.5
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.Children shall not play with the appliance. Cleaning and user
maintenance shall not be made by children without supervision.

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2 Safety Considerations
Please read the following contents carefully before operating.
WARNING
■Once abnormality like burning
smell occurs, please cut off
the power supply immediately
and then contact with service
center.
If the abnormality still exists, the
unit may be damaged and
electric shock or re may result.
■Don't operate the unit with wet
hands.
Otherwise, it may cause electric
shock.
■Before installation,please
see if the voltage of local
place accords with that on
nameplate of unit and capacity
of power supply, power cord
or socket is suitable for input
power of this unit.
■Special circuit must be
adopted for power supply to
prevent re.
Do not use octopus multipurpose
plug or mobile terminal board for
wire connection.
■Be sure to pull out the power
plug and drain the unit when
unit is not in use for a long
time.
Otherwise, the accumulated dust
may cause overheating,fire or
freeze of the plate heat exchanger
in winter.
■Never damage the electric
wire or use the one which is
not specied.
■Otherwise, it may cause over-
heating or re.
■Before cleaning please cut off
the power supply.
Otherwise, it may cause electric
shock or damage.
■The power supply must adopt
special circuit with leakage
switch and enough capacity.
■User can not change power
cord socket without prior
consent. Wiring working must
be done by professionals.
Ensure good earthing and
don't change earthing mode
of unit.

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■Earthing: the unit must be
earthed reliably ! The earthing
wire should connect with
special device of buildings.
If not, please ask the qualified
personnel to install.
Furthermore, don't connect
earth wire to gas pipe, water
pipe, drainage pipe or any
other improper places which
professional does not recognize.
■Never insert any foreign
matter into uint to avoid
damage . And never insert
your hands into the air outlet
of the unit.
■Don't attempt to repair the unit
by yourself.
Improper repair may cause electric
shock or fire, so you should
contact the service center to
repair.
■Don't step on the top of the
unit or place anything on it.
There is the danger of fall of
things or people.
■Never block the air inlet and
outlet of unit.
It may reduce efficiency or cause
stop of the unit and even re.
■Keep pressurized spray, gas
holder and so on away from
the unit above 1m .
It may cause re or explosion.
■Please note whether the
installation stand is firm
enough or not.
If damaged, it may cause fall of
the unit and injury of people.
■Unit should be installed at the
place with good ventilation to
save energy.
■When there is not water in the
unit, never power the unit on
to run.
Notice!
(1) Before installation, please check if the adopted power is accordance with that listed on
nameplate, and check the safety of power.
(2) Before using, please check and conrm if wires and water pipes are connected correctly to avid
water leakage, electric shock or re etc.
(3) Don’t operate the unit with wet hands, and don’t allow children to operate the unit.

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(4) ON/OFF in this manual indicates the ON/OFF of the control; power cut-off means to stop
supplying power to the unit.
(5) Don’t directly expose the unit under the corrosive ambient with water or dampness.
(6) The air inlet/outlet of the unit cannot be blocked by other objects.
(7) Water in the unit and pipeline should be discharged when the unit is not in use to prevent the
pipeline and water pupmp from frost-cracking.
(8) Never press the button with sharp objects to protect manual controller. Never use other wires
instead of special communication line of the unit to protect control elements. Never clean the
manual controller with benzene, thinner or chemical cloth to avoid fading of surface and failure
of elements. Clean the unit with the cloth soaked in neutral eradicator .Slightly clean the display
screen and connecting parts to avoid fading.
(9) The power cord must be separated with the communication line.
(10) Maximum and minimum water operating temperatures:
Minimum water operating temperatures Maximum water operating temperatures
Cooling 7 oC 25 oC
Heating 25 oC 60 oC
Maximum and minimum water operating pressures:
Minimum water operating pressures Maximum water operating pressures
Cooling
Heating 0.05 MPa 0.25 MPa
Maximum and minimum entering water pressures:
Minimum entering water pressures Maximum entering water pressures
Cooling
Heating 0.05 MPa 0.25 MPa
The range of external static pressures at which the appliance was tested (add-on heat pumps, and
appliances with supplementary heaters,only); If the supply cord is damaged, it must be replaced by
the manufacturer, its service agent or similarly qualied persons in order to avoid a hazard.
If there is any question, please contact with local dealer, authorized service center, agencies or our
company directly.
3 Diagram of the Operating Principle
1
2
3
45
6
7
8
9
10
11
12
13
14
15
16
17
20 21 22 23
24
25
33
34
Monobloc Unit Field Supplied
27
31
19
26
28
29
30
32
18

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No. Name No. Name No. Name No. Name
1Inverter compressor 10 EXV 1 19 Expansion tank 28 2-way valve
2Discharge temperature
sensor 11 Flasher 20 Safety valve 29 Floor radiator
3High-pressure switch 12 Pressure sensor 21 Flow switch 30 Water collector
4High pressure sensor 13 Solenoid valve 22 Water pump 31 FCU
54-way valve 14 EXV 2 23 Outlet pipe connector 32 By-pass valve
6Finned heat exchanger 15 Pressure sensor 24 Inlet pipe connector 33 Vapor liquid separator
7Environment
temperature sensor 16 Suction temperature sensor 25 Filter 34 Plate heat exchanger
8Defrosting temperature
sensor 17
Outlet water
temperature sensor
(plate heat exchanger)
26
Inlet temperature
sensor
(plate heat
exchanger)
9Filter 18 Outlet temperature
sensor (auxiliary heater) 27 Water separator
4 Operating Principle of the Unit
The Mini chiller is composed of the monobloc unit. Operation functions include:
(1) Cooling;
(2) Heating;
(3) Emergency mode;
(4) Holiday mode;
(5) Forced Operation Mode;
(6) Quiet mode;
(7) Weather-dependent Operation;
(8) Floor debugging;
(9) Air removal of the water system;
(10) Operation of backup heat source
Cooling: in cooling mode, refrigerant is condensed in the aluminum fin-copper tube and
evaporated in the plate heat exchanger. Via heat exchange with water in the plate heat exchanger,
the temperature of water decreases and it releases heat while the refrigerant absorbs heat and
evaporates. With the help of the wired controller, the outflow temperature can meet the user’s
requirement. Through control of valves, the low-temperature water in the system can reach the
indoor fan coil and underground pipes, and exchanges heat with the indoor air so that the indoor
temperature decreases to the required range.
Heating: in heating mode, refrigerant evaporates in the aluminum n-copper tube and is condensed
in the plate heat exchanger. Via heat exchange with water in the plate heat exchanger, the water
absorbs heat and its temperature increase while the refrigerant releases heat and is condensed. With
the help of the wired controller, the outow temperature can meet the user’s requirement. Through
the control of valve, the high-temperature water in the system can reach the indoor fan coil and
underground pipes, and exchanges heat with the indoor air so that the indoor temperature increases
to the required range.
Emergency mode: this mode is only available for heating. When the monobloc unit stops due to
malfunction, it will enter the corresponding emergency mode; At the heating mode, after entering the
emergency mode, only when the electric heater has been installed, can heating be aviablle, otherwise
heating fails. When the setting outflow temperature or indoor temperature is reached, the electric
heater will stop running.
Holiday mode: this mode is only available for heating mode. This mode is set to keep indoor
temperature or leaving water temperature in a certain range so as to prevent water system of the unit

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from freezing or protect certain indoor articles from freezing damage. When the monobloc unit stops
due to malfunction, two e-heaters (once installed) of the unit will run.
Forced Operation Mode: this mode is only used for refrigerant recovery and debugging for the
unit.
Quiet mode: it is available in cooling and heating. In this mode, the monobloc unit will reduce the
running noise via automatic control.
Weather-dependent Operation: this mode is available for cooling and heating. In weather-
dependent mode, the setting value (remote room air temperature or leaving water temperature) is
detected and controlled automatically when the outdoor air temperature is changed.
Floor debugging: this function is intended to preheat the oor periodically for the rst use.
Air removal of the water system: this function is intended to replenish water and remove air in
the water system to make the equipment run at the stabilized water pressure.
Operation of backup heat source: in this mode, when the outdoor temperature is lower than the
triggering temperature of the backup heat source and the unit stops owing to some malfunction or
protection which remains after the compressor has stopped for three minutes, then the heat source
will function to supply heat for the room.
5 Nomenclature
HL R 12 Pd / Na - M
1 2 3 4 5 6
NO. Description Options
1 Air-cooled Mini Chiller -
2 Heat Pump -
3 Nominal Heating Capacity 8=8kW;10=10kW; 12=12kW; 14=14kW
4 Compressor Style Pd=DC Inverter; Default=On/Off
5Refrigerant Type Na- R410A
6 Power Supply K=220V-240V,1Ph,50Hz; M=380V-415V,3Ph,50Hz; H=380, 3Ph; 60Hz
Model Line-Up
Model Name Capacity Power supply
Heating1,kW Cooling2,kW
HLR8Pd/Na-K 8 6.2 220-240V,1Ph,50Hz
HLR10Pd/Na-K 10 7.5
HLR12Pd/Na-M 12 9.5 380-415V,3Ph,50Hz
HLR14Pd/Na-M 14 11
Notes:
1Capacities and power inputs are based on the following conditions:
Indoor Water Temperature 40°C/45°C,Outdoor Air Temperature 7°C DB/6°C WB;
2Capacities and power inputs are based on the following conditions:
Indoor Water Temperature 12°C/7°C,Outdoor Air Temperature 35°C DB/-.

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6 Installation Example
CASE 1: Connection of Terminals for Heating and Cooling (Under oor Loop, Fan Coil Unit,
and Radiator)
B
M
Under Floor Coil
FCU 1
T
Radiator
B
T
Bypass valve (field supplied)
High temperature line Low temperature line
2-Way Vavle (field supplied)
Remote room thermostat (field supplied)
Controll Cable
M
FCU 2
Notes:
① The two-way valve is very important to prevent dew condensation on the oor and radiator while
cooling mode;
② Type of thermostat and specication should be complied with installation of this manual;
③ The by-pass valve must be installed to secure enough water ow rate, and should be installed
at the collector.
CASE 2: Connection between the Electric Heater and the Main Unit
Two groups of electric heaters are available, as well as control terminals for two groups of auxiliary
electric heaters. These two groups of electric heaters can be activated at the same time. When only
one group of the electric heater is installed, please follow the wiring of any group of the diagram
shown below.
(1) See the following statement for installation of two groups of auxiliary electric heaters, including
wiring of the AC contactor, the thermostat and the tank-type electric heater.
◆Wiring of the AC Contactor
L1, L2 and L3 are three-phase input terminals. T1, T2 and T3 are three-phase output terminals. A1
and A2 are terminals of input and output signals which are used to control the AC contactors. NO and
NC are normally open and closed terminals of the AC contactors.
The tank-type electric heater and AC contacts should be selected according to the selection
instructions and the thermostat and its upper limit should be decided by the protection function of the
electric heater.
In order to ensure product quality and service life, it is unallowable to do wiring directly at the main
board by the user themselves to prevent the main board from being damaged. The AC contactor
control signal input terminal X17 (AC contactor 1) and X18 (AC contactor 2) of the main board AP1
should be connected to terminal 7 and terminal 8 of the electric box. The single pins of terminal
CN26 (AC contactor 1) and CN27 (AC contactor 2) should be connected to terminal 35 and 36 of the
electric box. Besides, other two pins of CN 26 and CN27 both should be connected to XT2 (see the
diagram below for more details).
Only qualied cables are allowed and see the table below for the corresponding wiring terminals.

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No. Wiring Terminal
AC Contactor 1 7—A1
35—2T1
AC Contactor 2 8—A1
36—2T2
◆Wiring of the Thermostat
The proper limit of the thermostat should be selected based on the protection function of the
electric heater.
Firstly, short-circuit the ON/OFF control signal output terminals of AC contactor 1 and AC contactor
2, and then connect them with the thermostat in series. Do not let the temperature of the external
wall of the tank-type electric heater too high (see the diagram below for more details). After that,
apply heat-conducting paste on the sensing probe and then insert it to the sensing hole to sense the
temperature of the external wall of the tank-type electric heater.
◆Wiring of the Tank-type Electric Tank
The tank-type electric heater with proper power output should be used and the heating pipe should
be installed at the water inlet side of the unit.
Three-phase wiring for the electric heater should be supplied by the user themselves. A new
electric box is recommended to be used. See the diagram below for more details.
When protection function of the thermostat is required, the sensing probe applied with heat-
conducting paste should be inserted into the sensing hole after wiring of the electric heater has been
nished.
7
8
6
35
36
34
X17
X18
CN26
CN27
2T1 4T26 T3
1L1 3L2 5L3
13
NO
21
NC A1
14
NO
22
NC
A2
2T1 4T26 T3
1L1 3L2 5L3
13
NO
21
NC A1
14
NO
22
NC
A2
XT2
7
8
6
34
35
36
Electric Box
Wiring Board
AC Contactor 1
AC Contactor 2
Tank-type Electric Heater
Main Board AP1
Thermostat Sensing probe
Neutral Line
Field Installation Diagramof the Electric Heater
(with the thermostat)

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(2) See the following statement for installation of two groups of auxiliary electric heaters, including
wiring of the AC contactors and the tank-type electric heater.
◆Wiring of the AC contactors is the same as that stated above.
◆When the thermostat is not required, do the wiring as shown in the diagram below. The output
terminal used to control the thermostat should be short-circuited and then be connected to
terminal 9 ( it is the terminal for the neutral line).
◆Wiring of the tank-type electric heater is the same as that stated above.
7
8
6
35
36
34
X17
X18
CN26
CN27
2T1 4T26 T3
1L1 3L2 5L3
13
NO
21
NC A1
14
NO
22
NC
A2
2T1 4T26 T3
1L1 3L2 5L3
13
NO
21
NC A1
14
NO
22
NC
A2
7
8
6
34
35
36
9
AC Contactor 1
A
C
C
ontactor 2
Wiring Board
Electric Box
Mainboard AP1
Field Instalaltion Diagram of the Electric Heater
(without the thermostat)
XT2

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Notes:
① During installation, the electric heater should be supplied with three-phase power separately.
When only one group of the electric heater is installed, please follow the wiring of any group of the
diagram shown above.
② Quantity of the AC contactors should match with that of the electric heater installed. Proper AC
contactors which meet the actual demands should be adopted.
③ The wiring mode depends on if the tank-type electric heater is equipped with a thermostat or
not.
④ Proper power lines should be used and those that do not meet actual demands should be
avoided.
⑤ Never open the electric box for wiring of the mainboard by the user themselves.
7 Main Components
(1) HLR8Pd/Na-K, HLR10Pd/Na-K
DC Fan Motor
Control Box
Water Pum
p
Ex
p
ansion Tank
Plate Heat Exchan
g
er
P
l
Com
p
ressor
Flow Switch
F
l
o
w
S
w
i
t
c
h
Safet
y
Valve

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(2) HLR12Pd/Na-M, HLR14Pd/Na-M
Control Box
Ex
p
ansion Tank
Water Pum
p
DC Fan Motor
Com
p
ressor
o
rPlate Heat Exchan
g
er
Flow Switch

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8 Installation Guideline of the Unit
8.1 Instruction to installation
(1) Installation of the unit must be in accordance with national and local safety codes.
(2) Installation quality will directly affect the normal use of the air conditioner unit. The user is
prohibited from installation. Please contact your dealer after buying this machine. Professional
installation workers will provide installation and test services according to installation manual.
(3) Do not connect to power until all installation work is completed.
8.2 Installation of the Monobloc Unit
8.2.1 Selection of the Installation Location of the Monobloc Unit
(1) The monobloc unit must be installed on a rm and solid support.
(2) Avoid placing the monobloc unit under window or between two constructions, hence to prevent
normal operating noise from entering the room.
(3) Air ow at inlet and outlet shall not be blocked.
(4) Install at a well-ventilated place, so that the machine can absorb and discharge sufcient air.
(5) Do not install at a place where ammable or explosive goods exist or a place subject to severe
dust, salty fog and polluted air.
8.2.2 Outline Dimensions of the Monobloc Unit
(1) HLR8Pd/Na-K, HLR10Pd/Na-K
1390
412
361 388
890

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(2) HLR12Pd/Na-M, HLR14Pd/Na-M
367
340
1390
1430
8.2.3 Space Requirements for Installation
＞1000
＞2000
＞500
＞500 ＞500
＞500
＞2000
8.2.4 Precautions on installation of the Monobloc Unit
(1) When moving the monobloc unit, it is necessary to adopt 2 pieces of long enough rope to hand
the unit from 4 directions. Included angle between the rope when hanging and moving must be
40°below to prevent center of the unit from moving.
(2) The monobloc unit should be installed on concrete base that is 10cm height.
(3) Requirements on installation space dimension of unit’s bodies are shown in following drawing.
(4) The monobloc unit must be lifted by using designated lifting hole. Take care to protect the unit
during lift. To avoid rusting, do not knock the metal parts.

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8.3 Water Volume and Pump Capacity (with pump)
n max
n/
1
/min
n
min
Off
0132
1U
/V
Note: during operation, the water pump will adjust its output based on the actual load.

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8.4 Water Volume and Expansion Vessel Pressure
Pre-pressure in expension vessel(Bar)
Maximum total water volume(liter)
2.5
2.0
1.5
1.0
0.5
0.0 0 50 100 150 200 250 300 350 400
Notes:
① The expansion vessel is 10 liter and 1bar pre-pressurized;
② Total water volume of 280 liter is default; if total water is changed because of installation
condition, the pre-pressure should be adjusted to secure proper operation;
③ Minimum total water volume is 20 liter;
④ To adjust pre-pressure, use nitrogen gas by certicated installer.
8.5 Selection of Expansion Vessels
Formula:
V--- Volume of expansion vessel
C--- Total water volume
P1--- Pre-set pressure of expansion vessel
P2-- The highest pressure during running of the system (that is the action pressure of safety valve.)
e---The expansion factor of water (the difference between the expansion factor of the original water
temperature and that of highest water temperature.)
Water expansion factor in different temperature
Temperature(℃
)Expansion factor e
0 0.00013
4 0
10 0.00027
20 0.00177
30 0.00435
40 0.00782
45 0.0099
50 0.0121
55 0.0145
60 0.0171
65 0.0198
70 0.0227
75 0.0258
80 0.029
85 0.0324
90 0.0359
95 0.0396
100 0.0434

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9 Remote Air Temperature Sensor
Front side Back side
Remote Air Temperature Sensor
Doors
NO
NONO
NO
1.5 Meters
YES
CN1 15K
CN15
Remote Air Environmen
t
Temp sensor
Electric box 2
Notes:
① Distance between the monobloc unit and the remote air temperature senor should be less than
15 meters due to length of the connection cable of remote air temperature sensor;
② Height from oor is approximately 1.5 meters;
③ Remote air temperature sensor can not be located where the area may be hidden when door is
open;
④ Remote air temperature sensor can not be located where external thermal inuence may be
applied;
⑤ Remote air temperature sensor should be installed where space heating is mainly applied;
⑥ After the remote air temperature sensor is installed, it should be set to “With” through the wired
controller so as to set the remote air temperature to the control point.

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10 Thermostat
Installation of the thermostat is very similar to that of the remote air temperature sensor.
21 22 23 24 25 26
Thermostat
XT3
220V AC 24V AC
2220V GND 224V GND
OFF OFF
HEAT COOL COOL HEAT
27 28 29 30
Thermostat
How to Wire Thermostat
(1) Uncover the front cover of the monobloc unit and open the control box.
(2) Identify the power specification of the thermostat, if it is 230V , find terminal block XT3 as
NO.21~25; Otherwise, if it is 24V, nd terminal block XT3 as NO.26~30;
(3) If it is the heating/cooling thermostat, please connect wire as per the gure above;
CAUTION!
① Never use 230V AC and 24V AC thermostat at the same time, otherwise, it will cause short
circuit and power cut-off by the circuit breaker;
② Setting temperature by the thermostat(heating or cooling) should be within the temperature
range of the product ;
③ For other constrains, please refer to previous pages about the remote air temperature sensor;
④ Do not connect external electric loads. Wire 220V AC(24V AC) and 220V GND(24V GND)
should be used only for the electric thermostat.
⑤ Never connect external electric loads such as valves, fan coil units, etc. If connected, the
mainboard of the unit can be seriously damaged.
⑥ Installation of the thermostat is very similar to that of the remote air temperature sensor.
11 2-Way Valve
The 2-way valve is required to control water ow for cooling operation. The role of 2-way valve is to
cut off water ow into the underoor loop when the fan coil unit is equipped for cooling operation.
General Information
Type Power Operating Mode Supported
NO 2-wire 230V 50Hz 1Ph AC Closing water ow Yes
Opening water ow Yes
NC 2-wire 230V 50Hz 1Ph AC Closing water ow Yes
Opening water ow Yes
(1) Normal Open type. When electric power is NOT supplied, the valve is open. (When electric
power is supplied, the valve is closed.)
(2) Normal Closed type. When electric power is NOT supplied, the valve is closed. (When electric
power is supplied, the valve is open.)
How to Wire 2-Way Valve:
Follow steps below to wire the 2-way valve.
Step 1. Uncover the front cover of the unit and open the control box.
Step 2. Find the terminal block and connect wires as below.

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4 5 6 10 11 12
2-Way Valve 2 2-Way Valve 1
XT2
L1(OFF)
L2(ON)
L1(OFF)
L2(ON)
N N
WARING!
① Normal Open type should be connected to wire (ON) and wire (N)for valve closing in cooling
mode.
② Normal Closed type should be connected to wire (OFF) and wire (N)for valve closing in cooling
mode.
(ON) : Line signal (for Normal Open type) from PCB to 2-way valve
(OFF) : Line signal (for Normal Closed type) from PCB to 2-way valve
(N) : Neutral signal from PCB to 2-way valve
The 2-way value 2 is reserved without any control program. At the eld installation, it should be
wired at the terminal board of the 2-way valve 1.
12 Wired Controller
Wired controller wiring guidance:
13 Other Auxiliary Heat Sources
Other auxiliary heat sources are allowed for the equipment and controlled in such a way that the
mainboard will output 230V when outdoor temperature is lower than the set point for startup of the
auxiliary heat source.
13 14
Other Thermal
XT2
N
14 Gate-controller
If there is gate control function,installation guide follow as: