Gree GRS-CQ4.0Pd/NhG3-E User manual

Change for life
Air-to-water Heat Pump
GRS-CQ4.0Pd/NhG3-E
GRS-CQ6.0Pd/NhG3-E
GRS-CQ8.0Pd/NhG3-E
GRS-CQ10Pd/NhG3-E
GRS-CQ8.0Pd/NhG3-M
GRS-CQ10Pd/NhG3-M
GRS-CQ12Pd/NhG3-E
GRS-CQ14Pd/NhG3-E
GRS-CQ16Pd/NhG3-E
GRS-CQ12Pd/NhG3-M
GRS-CQ14Pd/NhG3-M
GRS-CQ16Pd/NhG3-M
GRS-CQ4.0Pd/NhG4-E
GRS-CQ6.0Pd/NhG4-E
GRS-CQ8.0Pd/NhG4-E
GRS-CQ10Pd/NhG4-E
GRS-CQ8.0Pd/NhG4-M
GRS-CQ10Pd/NhG4-M
GRS-CQ12Pd/NhG4-E
GRS-CQ14Pd/NhG4-E
GRS-CQ16Pd/NhG4-E
GRS-CQ12Pd/NhG4-M
GRS-CQ14Pd/NhG4-M
GRS-CQ16Pd/NhG4-M
Owner's Manual
Original Instructions
Air Conditioners
MONOBLOC
TYPE

To Users
Thank you for selecting Gree’s product. Please read this instruction manual carefully before installing and using
the product, so as to master and correctly use the product. In order to guide you to correctly install and use our
product and achieve expected operating e󰀨ect, we hereby instruct as below:
(1) This equipment should be installed, operated or maintained by the qualified servicemen who have had
specic training. During operation, all safety issues covered in the labels, User’s Manual and other literature
should be followed strictly. This equipment 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.
(2) This product has gone through strict inspection and operational test before leaving the factory. In order
to avoid damage due to improper disassembly and inspection, which may impact the normal operation of
unit, please do not disassemble the unit by yourself. You can contact our designated dealer or local service
center for professional support if necessary.
(3) When the product is faulted and cannot be operated, please contact our designated dealer or local service
center as soon as possible by providing the following information.
• Contents of nameplate of product (model, cooling/heating capacity, product No., ex-factory date).
• Malfunction status (specify the situations before and after the error occurs).
(4) All the illustrations and information in the instruction manual are only for reference. In order to make the
product better, we will continuously conduct improvement and innovation without further notice.

Contents
Safety Notices (Please be sure to abide ) ...................................................................1
1. Diagram of the Operating Principle .......................................................................10
2. Operating Principle of the Unit............................................................................... 11
3. Nomenclature...........................................................................................................12
4. Installation Example .............................................................................................14
5. Main Components ..................................................................................................16
6. Installation Guideline of Monobloc Unit................................................................16
6.1 Instruction to installation .................................................................................................16
6.2 Installation of monobloc unit ...........................................................................................17
7. Installation of Hydraulic Unit..................................................................................20
7.1 Available external static pressure of outlet......................................................................20
7.2 Ambient temperature and leaving water temperature upper limit ...................................21
7.3 Water volume and expansion vessel pressure ...............................................................22
7.4 The method of calculating the charging pressure of expansion vessel ..........................22
7.5 Selection of expansion vessel.........................................................................................23
8. Remote Air Temperature Sensor............................................................................ 24
9. Thermostat...............................................................................................................25
10. 2-Way Valve............................................................................................................26
11. 3-Way Valve ............................................................................................................26
12. Other Thermal ......................................................................................................27
13. Optional Electric Heater........................................................................................28
14. Gate-controller.......................................................................................................29
15. Charging and Discharging of Refrigerant...........................................................29
16. Installation of Insulated Water Tank ...................................................................31
16.1 Installation measure......................................................................................................31
16.2 Outline dimension and parameter of water tank ...........................................................32
16.3 Connection of waterway system ...................................................................................33
16.4 Requirements on water quality ....................................................................................35
16.5 Electric wiring work ......................................................................................................35
17. Wring Diagram.......................................................................................................37
17.1 Control board ................................................................................................................37
17.2 Electric wiring................................................................................................................43
18. Commissioning......................................................................................................48
18.1 Check before startup.....................................................................................................48

18.2 Test run .........................................................................................................................49
19. Daily Operation and Maintenance .......................................................................50
19.1 Recovery.......................................................................................................................51
19.2 Decommissioning..........................................................................................................51
19.3 Notice before seasonal use ..........................................................................................52
19.4 Safety considerations....................................................................................................52
19.5 Maintenance of the water tank......................................................................................53
19.6 Maintenance of the unit.................................................................................................54

Air-to-water Heat Pump
1
MONOBLOC
TYPE
Safety Notices (Please be sure to abide )
WARNING: If not abide strictly, it may cause severe damage to the unit or the
people.
NOTE: If not abide strictly, it may cause slight or medium damage to the unit or the
people.
This sign indicates that the operation must be prohibited. Improper operation may
cause severe damage or death to people
This sign indicates that the items must be observed. Improper operation may
cause damage to people or property.
NOTE
After receipt of the unit, check it for appearance, unit model compared with your desire
and attachments.
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.
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.
This product is a kind of comfort air conditioning, and is not allowed to be installed
where there are corrosive, explosive and inammable substances or smog; otherwise
it would lead to operation failure, shortened service life, five hazard or even severe
injuries. Special air conditions are required for where mentioned above.
Correct Disposure
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.
R32:675

Air-to-water Heat Pump
2
MONOBLOC
TYPE
WARNING
Once abnormality
likeburning smell occurs,
please cut o󰀨 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 hand.
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
indoor unit and water tank
when unit is not in use for a
long time.
Otherwise, the accumulated
dust may cause
overheating,re or freeze of
water tank or coaxial heater
exchanger in winter.
Never damage the
electric wire or use
the one which is not
specied.
Otherwise, it may
cause overheating or
re.

Air-to-water Heat Pump
3
MONOBLOC
TYPE
Before cleaning please cut
o󰀨 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.
Earthing: the unit must
be earthed reliably ! The
earthing wire should
connect with special device
of buildings.
If not, please ask the
qualied 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 outdoor unit to
avoid damage . And never
insert your hands into the
air outlet of outdoor unit.
Don't attempt to repair
the unit by yourself.
Improper repair may
cause electric shock
or re, so you should
contact the service
center to repair.

Air-to-water Heat Pump
4
MONOBLOC
TYPE
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 e󰀩ciency 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 rm
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 water tank,
never power the unit
on to run.

Air-to-water Heat Pump
5
MONOBLOC
TYPE
WARNING
Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacturer. Should repair be necessary, contact your nearest
authorized service centre. Any repairs carried out by unqualified personnel may be
dangerous. The appliance shall be stored in a room without continuous operating ignition
sources. (for example: open ames, an operating gas appliance or an operating electric
heater.) Do not pierce or burn.
Appliance shall be installed, operated and stored in a room with a floor area larger
than Xm .(Please refer to table “a” in section of “Safety Operation of Inflammable
Refrigerant” for space X.)
Appliance filled with flammable gas R32. For repairs, strictly follow manufacturer’s
instructions only. Be aware that refrigrants not contain odour. Read specialist’s manual.
If a stationary appliance is not tted with a supply cord and a plug, or with other means
for disconnection from the supply mains having a contact separation in all poles that
provides full disconnection under overvoltage category III conditions, the instructions
shall state that means for disconnection must be incorporated in the fixed wiring in
accordance with the wiring rules.
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.
The appliance shall be stored in a well-ventilated area where the room size
corresponds to the room area as specied for operation.
The appliance shall be stored in a room without continuously operating open ames
(for example an operating gas appliance) and ignition sources (for example an operating
electric heater).
The appliance shall be stored so as to prevent mechanical damage from occurring.

Air-to-water Heat Pump
6
MONOBLOC
TYPE
NOTE
Appliance lled with ammable gas R32.
Before use the appliance, read the owner’s manual rst.
To realize the function of the air conditioner unit, a special refrigerant circulates in
the system. The used refrigerant is the fluoride R32, which is specially cleaned.The
refrigerant is flammable and inodorous. Furthermore, it can leads to explosion under
certain conditions. But the flammability of the refrigerant is very low. It can be ignited
only by re.
Compared to common refrigerants, R32 is a nonpolluting refrigerant with no harm to
the ozonosphere. The inuence upon the greenhouse e󰀨ect is also lower. R32 has got
very good thermodynamic features which lead to a really high energy efficiency. The
units therefore need a less lling.
Before installation, please check if the adopted power is accordance with that listed on
nameplate, and check the safety of power.
The unit shall contact with the supply mains by a full disconnection device under
overvoltage category Ⅲ.
Before using, please check and confirm if wires and water pipes are connected
correctly to avoid water leakage, electric shock or re etc.
Don’t operate the unit with wet hand, and don’t allow children to operate the unit.
The On/o󰀨 in the instruction is for the operation to on and o󰀨 button of PCB for users;
cut o󰀨 power means to stop supplying power to the unit.
Don’t directly expose the unit under the corrosive ambient with water or dampness.
Don’t operate the unit without water in water tank .The air outlet/inlet of unit cannot be
blocked by other objects.
The water in unit and pipeline should be discharged if the unit is not in use, to prevent
the water tank, pipe line and water pump from frost-cracking.
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.
The power cord must be separated with the communication line.
Any person who is involved with working on or breaking into a refrigerant circuit should
hold a current valid certicate from an industry-accredited assessment authority, which
authorises their competence to handle refrigerants safely in accordance with an industry
recognised assessment specication.
Servicing shall only be performed as recommended by the equipment manufacturer.
Maintenance and repair requiring the assistance of other skilled personnel shall be
carried out under the supervision of the person competent in the use of flammable
refrigerants.