Gree GMV-NX140P/A(X1.2)-K User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
Multi Variable Air Conditioners
Fresh Air Series Indoor Unit
Models:
GMV-NX140P/A(X1.2)-K
GMV-NX224P/A(X2.0)-M
GMV-NX280P/A(X2.5)-M
GMV-NX280P/A(X3.0)-M
GMV-NX450P/A(X4.0)-M

To Users
Thank you for selecting Gree 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 effect, we hereby instruct as below:
(1) 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.
(2) In order to ensure reliability of product, the product may consume some power under stand-by
status for maintaining normal communication of system and preheating refrigerant and lubricant.
If the product is not to be used for long, cut off the power supply; please energize and preheat
the unit in advance before reusing it.
(3) Please properly select the model according to actual using environment; otherwise it may
impact the using convenience.
(4) This product can’t be installed at corrosive, inflammable or explosive environment or the place
with special requirements, such as kitchen. Otherwise, it will affect the normal operation or
shorten the service life of the unit, or even cause fire hazard or serious injury. As for above
special places, please adopt special air conditioner with anti-corrosive or anti-explosion
function.
(5) If the product needs to be installed, moved or maintained, please contact our designated dealer
or local service center for professional support. Users should not disassemble or maintain the
unit by themselves, otherwise it may cause relative damage, and our company will bear no
responsibilities.
(6) 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. If there is
adjustment in the product, please subject to actual product.

Exception Clauses
Manufacturer will bear no responsibilities when personal injury or property loss is caused by the
following reasons:
(1) Damage the product due to improper use or misuse of the product;
(2) Alter, change, maintain or use the product with other equipment without abiding by the
instruction manual of manufacturer;
(3) After verification, the defect of product is directly caused by corrosive gas;
(4) After verification, defects are due to improper operation during transportation of product;
(5) Operate, repair, maintain the unit without abiding by instruction manual or related regulations;
(6) After verification, the problem or dispute is caused by the quality specification or performance
of parts and components that produced by other manufacturers;
(7) The damage is caused by natural calamities, bad using environment or force majeure.

Contents
1 Safety Notices (Please be sure to abide them) ............................................................1
2 Product Introductions ....................................................................................................3
2.1 Unit Introduction ...................................................................................................................... 3
2.2 Rated Working Condition......................................................................................................... 5
2.3 Working Temperature Range................................................................................................... 5
3 Preparations for Installation ..........................................................................................5
3.1 Standard Fittings...................................................................................................................... 6
3.2 Location for Installation............................................................................................................ 6
3.3 Requirements for Communication Line ................................................................................... 7
3.4 Wiring Requirements ............................................................................................................... 8
4 Installation Instructions .................................................................................................9
4.1 Installation of Indoor Unit......................................................................................................... 9
4.2 Pipe Connection .................................................................................................................... 12
4.3 Installation and Test of Drain Pipe ......................................................................................... 12
4.4 Installation of Air Duct............................................................................................................ 15
4.5 Installation of Wired Controller .............................................................................................. 19
5 Wiring Work...................................................................................................................19
5.1 Connection of Wire and Patch Board Terminal...................................................................... 20
5.2 Power Cord Connection ........................................................................................................ 21
5.3 Connection of Communication Line of IDU and ODU ........................................................... 21
5.4 Connect Communication Wire of Wired Controller................................................................ 22
5.5 Illuminate for Connection of Wired Controller and Indoor Units Network .............................. 23
6 Routine Maintenance....................................................................................................25
6.1 Cleaning of Filter ................................................................................................................... 25
6.2 Maintenance before the Seasonal Use ................................................................................. 25
6.3 Maintenance after the Seasonal Use .................................................................................... 25
7 The Table of Error Codes for Indoor Unit ...................................................................25
8 Troubleshooting............................................................................................................26

Multi Variable Air Conditioners Fresh Air Series Indoor Unit
1
1 Safety Notices (Please be sure to abide them)
WARNING: If not abide them strictly, it may cause severe damage to the unit or the
people.
NOTE: If not abide them strictly, it may cause slight or medium damage to the unit or the
people.
This sign indicates that the items 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.
WARNING!
This product can’t be installed at corrosive, inflammable or explosive environment or the
place with special requirements, such as kitchen. Otherwise, it will affect the normal
operation or shorten the service life of the unit, or even cause fire hazard or serious injury.
As for the above special places, please adopt special air conditioner with anti-corrosive or
anti-explosion function.
Follow this manual to complete
the installation work. Please
read this manual carefully
before turning on or repairing
the unit.
Installation should be
conducted by the dealer or
qualified personnel. Please do
not attempt to install the air
conditioner by yourself.
Improper installation may lead
to water leakage, electric shock
or fire hazard, etc.
Before installation, please
check whether the power
supply is complied with that
specified on the nameplate and
check the safety of the power
supply.
The air conditioner must be
grounded reliably for avoiding
electric shock. Please do not
connect the earthing wire to
gas pipe, water pipe, lightning
rod or telephone line.
Be sure to use special
accessories and parts for
installation to prevent water
leakage, electric shock and fire
hazard, etc.
If refrigerant leakage happens,
please ventilate the room
immediately.
Diameter of power cord should
be large enough. The damaged
power cord and connection wire
must be replaced with special
cables.
When the power cord is
connected, please fix the
electric box cover properly to
avoid safety accidents.
Never fail to comply with the
nitrogen-charging welding
process. Do charge nitrogen
when welding the pipes.
Never short circuit or cancel the
pressure switch to prevent unit
damage.

Multi Variable Air Conditioners Fresh Air Series Indoor Unit
2
As for the unit controlled by the
wired controller, connect the
wired controller well firstly and
then energize the unit;
otherwise, the unit can’t operate
normally.
When installation is finished,
please check whether the
drainage pipes, pipelines and
electric wires are connected
correctly to avoid water
leakage, refrigerant leakage,
electric shock or fire, etc.
Do not insert fingers or objects
into air outlet or air return grille.
Open the door and window
frequently to keep good
ventilation for avoiding oxygen
deficit when gas heater or oil
heater is used in the room.
Never plug in or unplug the
power plug directly to turn on or
turn off the air conditioner.
Once the air conditioner is
turned on, it can be turned off
only after it has operated for
5min at least; otherwise, it will
affect the oil return of
compressor.
Do not allow children to operate
this air conditioner. Do not operate this air
conditioner with wet hands.
The air conditioner can be
cleaned only when it has been
turned off and the power has
been cut off; otherwise, it may
cause electric shock or injury.
Never spray or flush water
towards the air conditioner;
otherwise, malfunction or
electric shock may happen.
Do not expose the air
conditioner to the moist or
corrosive environment.
Put through the power 8 hours
in advance before operation.
Do not cut off the power when
the air conditioner stops
operation for only about one
night (protect the compressor).
Volatile liquid, such as diluent or
gasoline, will damage the
appearance of air conditioner.
Only soft dry cloth and wet cloth
dipped with neutral detergent
can be used to clean the outer
case of air conditioner.
Under cooling mode, please
don't set the room temperature
too low; keep the temperature
difference between indoor and
outdoor within 5℃(41℉).
If there are any abnormal
circumstances (such as burning
smell, etc.), please turn off the
unit and cut off the main power
supply immediately, and then
contact Gree appointed service
center. If those abnormal
circumstances still exit, the unit
may be damaged and it may
lead to electric shock or fire
hazard.
Do not repair the unit by
yourself. Wrong maintenance
may cause electric shock or fire
hazard. Please contact Gree
appointed service center for
help.

Multi Variable Air Conditioners Fresh Air Series Indoor Unit
3
Any personal injury or property loss caused by improper installation, improper debug, and
unnecessary repair or not following the instructions of this manual should not be the responsibility of
Gree Electric Appliances, Inc. of Zhuhai.
Correct Disposal 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 return 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.
2 Product Introductions
2.1 Unit Introduction
VRF fresh air series indoor unit is a kind of air processing unit that inhales the fresh air from outdoor
side and then processes it to provide for the user in the room. Fresh air series indoor unit have three
kinds of connection according to different models:
(1) If the number of connected indoor units is more than one and connecting with conventional VRF
indoor units:
Optional indoor unit model
Connected
outdoor unit series
Connection condition
GMV-NX140P/A(X1.2)-K
GMV-NX224P/A(X2.0)-M
GMV-NX280P/A(X2.5)-M
GMV-NX280P/A(X3.0)-M
GMV5
GMV6
1)The total capacity of connected fresh air indoor units
cannot exceed 50%~100% of the capacity of outdoor
units;
2)The total capacity of connected fresh air indoor units
cannot exceed 30% of the capacity of outdoor units.
Fig 2.1.1 Connection diagram of outdoor unit is a single module

Multi Variable Air Conditioners Fresh Air Series Indoor Unit
4
Fig 2.1.2 Connection diagram of outdoor units is modular
(2) If the number of connected indoor units is more than one and all of them are VRF fresh air indoor
units:
Optional indoor unit model
Connected
outdoor unit series
Connection condition
GMV-NX140P/A(X1.2)-K
GMV-NX224P/A(X2.0)-M
GMV-NX280P/A(X2.5)-M
GMV-NX280P/A(X3.0)-M
GMV5
GMV6
GMV Slim*
The total capacity of connected fresh air indoor units cannot
exceed 50%~100% of the capacity of outdoor units.
GMV-NX450P/A(X4.0)-M GMV5
GMV6
1)Cannot match with other models of indoor units;
2)The total capacity of connected fresh air indoor units
cannot exceed 50%~100% of the capacity of outdoor
units.
Fig 2.1.3 Connection diagram of outdoor unit is a single module
Fig 2.1.4 Connection diagram of outdoor units is modular

Multi Variable Air Conditioners Fresh Air Series Indoor Unit
5
(3) If the number of connected indoor units is only one and it is VRF fresh air indoor unit:
Optional indoor unit model
Recommended
capacity of outdoor unit
Connected
outdoor unit series Connection condition
GMV-NX140P/A(X1.2)-K 14kW GMV Mini* The capacity of outdoor
unit is not less than the
recommended capacity
and cannot exceed 10% of
the recommended
capacity.
GMV-NX224P/A(X2.0)-M 22.4kW GMV5
GMV6
GMV Slim*
GMV-NX280P/A(X2.5)-M 28kW
GMV-NX280P/A(X3.0)-M 28kW
GMV-NX450P/A(X4.0)-M 45kW
GMV5
GMV6
Fig 2.1.5 Connection diagram of only one VRF fresh air indoor unit system
NOTES!
①Please match the outdoor unit in strict accordance with the above requirements, otherwise, the
comfortableness will be affected or even the unit will be damaged.
②If the VRF fresh air indoor unit match with GMV Slim series or GMV Mini series, please consult
technical staffs for details.
2.2 Rated Working Condition
-
Indoor Side Condition
Outdoor Side Condition
Dry Bulb Temp(℃) Wet Bulb Temp(℃) Dry Bulb Temp(℃) Wet Bulb Temp(℃)
Rated Cooling
35
28
35
28
Rated Heating
7
6
7
6
2.3 Working Temperature Range
-
Outdoor Ambient Dry Bulb(℃)
Working Temperature Range -7~45
NOTE!
The ex-factory set temperature is 18℃in cooling mode and 22℃in heating mode. If the user
needs to change the temperature setting, please contact after-sales service personnel.
3 Preparations for Installation
NOTE!
Product graphics are only for reference. Please refer to actual products. Unspecified measure unit is
mm.

Multi Variable Air Conditioners Fresh Air Series Indoor Unit
6
3.1 Standard Fittings
Please use the supplied standard fittings listed below as instructed.
No.
Name
Graphics
Quantity
Function
1 Wired Controller 1 Control indoor unit
2 Union Nut Sub-assy 1 Connect exit pipe
NOTE!
The packed attachments should be subject to actual objects. If there are any alterations, there will
be no further notice.
3.2 Location for Installation
(1) The top holder must be strong enough to support unit's weight.
(2) Drain pipe can drain water out easily.
(3) There is no obstacle at inlet or outlet. Please ensure good air circulation.
(4) In order to make sure the space for maintenance, please install the indoor unit according to the
dimension described below.
(5) Keep the unit away from heat source, inflammable gas or smoke.
(6) This is a concealed ceiling type unit.
(7) Indoor unit, outdoor unit, power cord and electric wire should stay at least 1m from the TV set
and radio. Otherwise, these electric appliances may have image interference and noise (Even if
the distance is 1m, when there is strong electric wave, noise may still occur).
Unit: mm
Fig.3.2
NOTES!
①Installation of the unit must be in accordance with National Electric Codes and local safety
regulations.