Gree GMV-ND09A/A-TU User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
GMV DC Air Handler
Models:
GMV-ND09A/A-T(U)
GMV-ND12A/A-T(U)
GMV-ND18A/A-T(U)
GMV-ND24A/A-T(U)
GMV-ND30A/A-T(U)
GMV-ND36A/A-T(U)
GMV-ND42A/A-T(U)
GMV-ND48A/A-T(U)
GMV-ND54A/A-T(U)

Preface
For correct installation and operation, please read all instructions carefully. Before reading the
instructions, please be aware of the following items:
(1) For the safe operation of this unit, please read and follow the instructions carefully.
(2) During operation, total capacity of indoor units should not exceed the total capacity of
outdoor units. Otherwise, poor effect of cooling or heating may result.
(3) Direct operators or maintainers should well keep this manual.
(4) If this unit fails to operate normally, please contact our service ncenter as soon as possible
and provide the following information:
Content on the nameplate (model No., cooling capacity, production code, ex-factory date).
Malfunction details (before and after the malfunction occurs).
(5) Each unit has been strictly tested and proved to be qualified before ex-factory. In order to
prevent units from being damaged or operating normally because of improper disassembly,
please do not disassemble the unit by yourself. If you need to disassemble and check units,
please contact our service center. We will send specialists to guide the disassembly.
(6) All graphics in this manual is only for your reference. For sales or production reasons, these
graphics are subject to change by manufacturer without prior notice.
User Notice
This appliance 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.
Correct Disposal of this product
This marking indicates that this product should not be disposed with other
household wastes. 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.

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 Precautions······················································································ 1
2 Product Introduction····················································································3
2.1 Names of Key Components················································································ 3
2.2 Rated Working Condition··················································································· 3
3 Preparative for Installation··········································································· 4
3.1 Pre-Installation Instruction·················································································· 4
3.2 Important Safety Instructions···············································································4
3.3 Requirements for Communication Line··································································6
3.4 Wiring Requirements·························································································7
4 Installation Instructions··············································································· 8
4.1 Dimension Data······························································································· 8
4.2 Location········································································································· 8
4.3 Piping Work···································································································10
4.4 Condensate Removal······················································································ 10
4.5 Ductwork·······································································································11
4.6 Installation of Wired Controller··········································································· 11
5 Wiring Work······························································································ 11
5.1 Connection of Wire and Patch Board Terminal······················································ 12
5.2 Power Cord Connection··················································································· 13
5.3 Connection of Communication Wire between Indoor Unit and Outdoor Unit (or indoor unit)
························································································································13
5.4 Connect Communication Wire of Wired Controller··················································14
5.5 Illuminate for Connection of Wired Controller and Indoor Units Network······················14
6 Routine Maintenance················································································· 15
6.1 Cleaning of Filter···························································································· 15
6.2 Maintenance before the Seasonal Use································································ 16
6.3 Maintenance after the Seasonal Use···································································16
7 Table of Error Codes for Indoor Unit···························································· 16
8 Troubleshooting························································································ 16

GMV DC Air Handler
1
1 Safety Precautions
(1) 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.
(2) Follow this instruction to complete the installation work. Please carefully read this manual before unit
startup and service.
(3) Wire size of power cord should be large enough.The damaged power cord and connection wire should
be replaced by exclusive cable.
(4) After connecting the power cord, please fix the electric box cover properly in order to avoid accident.
(5) Never fail to comply with the nitrogen charge requirements.Charge nitrogen when welding pipes.
(6) Never short-circuit or cancel the pressure switch to prevent unit damage.
(7) Please firstly connect the wired controller before energization, otherwise wired controller can not be
used.
(8) Before using the unit, please check if the piping and wiring are correct to avoid water leakage, refrigerant
leakage, electric shock, or fire etc.
(9) Do not insert fingers or objects into air outlet/inlet grille.
(10) Open the door and window and keep good ventilation in the room to avoid oxygen deficit when the gas/oil
supplied heating equipment is used.
(11) Never start up or shut off the air conditioner by means of directly plug or unplug the power cord.
(12) Turn off the unit after it runs at least five minutes; otherwise it will influence oil return of the compressor.
(13) Do not allow children operate this unit.
(14) Do not operate this unit with wet hands.
(15) Turn off the unit or cut off the power supply before cleaning the unit, otherwise electric shock or injury
may happen.
(16) Never spray or flush water towards unit, otherwise malfunction or electric shock may happen.
(17) Do not expose the unit to the moist or corrosive circumstances.
(18) Under cooling mode, please don't set the room temperature too low and keep the temperature difference
between indoor and outdoor unit within 5°C (41°F).
(19) User is not allowed to repair the unit. Fault service may cause electric shock or fire accidents. Please
contact Gree appointed service center for help.
(20) Before installation, please check if the power supply is in accordance with the requirements specified on
the nameplate. And also take care of the power safety.

GMV DC Air Handler
2
(21) Installation should be conducted by dealer or qualified personnel. Please do not attempt to install the unit
by yourself. Improper handling may result in water leakage, electric shock or fire disaster etc.
(22) Be sure to use the exclusive accessory and part to prevent the water leakage, electric shock and fire
accidents.
(23) Make sure the unit can be earthed properly and soundly after plugging into the socket so as to avoid
electric shock. Please do not connect the ground wire to gas pipe, water pipe, lightning rod or telephone
line.
(24) Electrify the unit 8 hours before operation. Please switch on for 8 hours before operation. Do not cut off
the power when 24 hours short-time halting (to protect the compressor).
(25) If refrigerant leakage happens during installation, please ventilate immediately. Poisonous gas will
emerge if the refrigerant gas meets fire.
(26) Volatile liquid like thinner or gasoline will damage the appearance of air conditioner. Please use soft dry
cloth or wet cloth with mild detergent to clean the outer case of air conditioner.
(27) If anything abnormal happens (such as burning smell), please power off the unit and cut off the main
power supply, and then immediately contact Gree appointed service center. If abnormality keeps going,
the unit might be damaged and lead to electric shock or fire.
Any personal injury or property loss caused by improper installation, improper debug, unnecessary
repair or not following the instructions of this manual should not be the responsibility of Gree Electric
Appliances, Inc. of Zhuhai.

GMV DC Air Handler
3
2 Product Introduction
2.1 Names of Key Components
Fig.2.1
2.2 Rated Working Condition
—
Indoor Side Condition
Outdoor Side Condition
Dry Bulb Temp°C(°F)
Wet Bulb Temp°C(°F)
Dry Bulb Temp°C(°F)
Wet Bulb Temp°C(°F)
Rated Cooling
26.7(80.0)
19.4(67.0)
35(95.0)
23.9(75.0)
Rated Heating
21.1(70.0)
15.6(60.0)
8.3(47.0)
6.1(43.0)
Indoor Unit Working Temperature Range: 16°C (60.8 °F) ~32°C (89.6 °F)

GMV DC Air Handler
4
3 Preparative for Installation
3.1 Pre-Installation Instruction
3.1.1 Checking Product Received
After receiving the product, please check if there is any damage caused by transportation.
Shipping damage is the responsibility of the carrier. Verify the model No., specifications and
accessories are correct prior to installation. The distributor or manufacturer will not accept claims
from dealers for transportation damage or installation of incorrectly shipped units.
3.1.2 Before Installation
Carefully read all instructions for the installation prior to installing product. Make sure each step
or procedure is understood and any special considerations are taken into account before starting
installation. Assemble all tools, hardware and supplies needed to complete the installation. Some
items may need to be purchased locally. Make sure everything needed to install the product is on
hand before starting.
3.1.3 Codes & Regulations
This product is designed and manufactured to comply with national codes. It is installer’s
responsibilities to install the product in accordance with such codes and/or any prevailing local
codes/regulations. The manufacturer assumes no responsibilities for equipment installed in violation
of any codes or regulations.
3.1.4 Replacement Parts
When reporting shortages or damages, or ordering repair parts, give the complete product No.
and serial numbers as stamped on the product. Replacement parts for this product are available
through your contractor or local distributor.
3.2 Important Safety Instructions
Recognize Safety Symbols, Words, and Labels
The following symbols and labels are used throughout this manual to indicate immediate or
potential hazards. It is the owner’s responsibility to read and comply with all safety information and
instructions accompanying these symbols. Failure to heed safety information increases the risk of
serious personal injury or death, property damage and/or product damage.
Immediate hazards which will result in property damage, product damage,
severe personal injury or death.
Hazards or unsafe practice could result in property damage, product
damage, severe personal injury or death.
Hazards or unsafe practices which may result in property damage, product
damage, severe personal injury or death.
Before serving or installing this equipment. The electrical power to this unit

GMV DC Air Handler
5
must be in the “off” position. Caution, more than one disconnect may exist. Failure to observe this
warning may result in an electrical shock that can cause personal injury or death.
The United States environmental protection agency (“EPA”) has issued
various regulations regarding the introduction and disposal of refrigerants introduced into this unit.
Failure to follow these regulations may harm the environment and can lead to the imposition of
substantial fines. These regulations may vary due to the passage of laws. A certified technician must
perform the installation and service of this product. Should questions arise, contact your local EPA
office.
Due to high system pressure and electrical shock in potential, installation
and service work can be dangerous. Only trained and qualified personnel are permitted to install or
service this equipment. Observe all warnings contained in this manual and labels/tags attached to the
equipment.
This product is factory shipped for use with a 208-230/1/60 electrical power
supply. This air handler must not be reconfigured to operate with any other power supply.
The unit must have an uninterrupted, unbroken electric grounding to
minimize the possibility of personal injury if an electric fault occurs. The electric grounding circuit may
consist of an appropriate sized power cord which connected with the grounding piece located in the
unit control box and also connecting to the building electric service panel. Other methods of
grounding are permitted if performed in accordance with the “national electric code” (NEC) /
“American national standards institute” (ANSI) / “national fire protection association” (NFPA) 70 and
local/state codes. In Canada, electric grounding conforms to the Canadian electric code CSA c22.1.
Failed to observe this warning can result in electrical shock that can cause personal injury.
Fig.3.2.1
Special warning for installation of furnaces or air handling units in enclosed areas, such
as garages, utility rooms or parking areas.
Carbon monoxide producing devices (such as an automobile, space heater, gas water heater,
etc.) should not be operated in enclosed areas such as unventilated garages, utility rooms or parking
areas because of the danger of carbon monoxide (CO) poisoning resulting from the exhaust
emissions. If a furnace or air handler is installed in an enclosed area such as a garage, utility room or
parking area and a carbon monoxide producing device is operated therein, there must be adequate

GMV DC Air Handler
6
ventilation directly to outside.
This ventilation is necessary to avoid the danger of CO poisoning which can occur if a carbon
monoxide producing device continues to operate in the enclosed area. Carbon monoxide emission
can be (re)circulated throughout the building if the furnace or air handler is operating in any mode.
CO can cause serious illness including permanent brain damage or death.
3.3 Requirements for Communication Line
If the unit is installed in the place with strong electromagnetic interference, shielded
wire must be applied on the communication wire between indoor unit and wired controller. Twisted
pair line with shielding function must be applied on the communication wire between indoor unit and
indoor unit (outdoor unit).
3.3.1 Select communication line for indoor unit and wired controller
Fig.3.3.1
Wire type
Total length of
communication wire
between indoor unit
and wired controller
Wire size
Wire
standard
Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(UL60335-2011)
L≤250m
(L≤820-1/5ft.)
2×AWG18~
2×AWG16
UL60335-
2011
1. Total length of communication cable can't
exceed 250m (820-1/5ft.).
2. The cord shall be Circular cord (the cores
shall be twisted together).
3. If unit is installed in places with intense
magnetic field or strong interference, it is
necessary to use shielded wire.