Gree Ultra Heat GMV Multi VRF Series User manual

Owner’s Manual
retain it for future reference. If you have lost the Owner’s Manual, please contact the local agent or visit
www.gree.com or sent email to [email protected] or electronic version.
i m p r o v e m e n t without further notice.
GREE reserves the right to interpret this manual which will be subject to any change due to product
Ultra Heat GMV Multi VRF Units
Heat Recovery Serial
Air Conditioners
GMV-VQ96W/A-F(U)
T hank you for choosing Air Conditioners, please read this owner’s manual carefully before operation and
G REE Electric Appliances, Inc. of Zhuhai reserves the final right to interpret this manual.
GMV-VQ192WM/A-F(U)
GMV-VQ72W/A-F(U)

Preface
Gree Ultra Heat GMV Multi VRF System, with the most advanced technologies in the world, uses
eco-friendly refrigerant R410A as its cooling medium. For correct installation and operation, please read
this manual carefully.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all
safety messages that follow this symbol to avoid possible
injury or death.
WARNING
This mark indicates procedures which, if improperly performed, might lead to the death or serious
injury of the user.
CAUTION
This mark indicates procedures which, if improperly performed, might possibly result in personal
harm to the user, or damage to property.
NOTICE is used to address practices not related to personal injury.
WARNING
(1) Instructions for installation and use of this product are provided by the manufacturer.
(2) Installation must be performed in accordance with the requirements of NEC and CEC by authorized personnel
only.
(3) For safety operation, please strictly follow the instructions in this manual.
(4) During operation, the gross rated capacity of working IDU should be within the gross rated capacity of ODU.
Otherwise, IDU’s cooling/heating performance will be reduced.
(5) This manual must be in the hands of direct operators or maintenance men.
(6) In case of malfunction and operation failure, please examine the following items and contact our authorized service
centers as soon as possible.
1) Nameplate (model, cooling capacity, product code, ex-factory date).
2) Malfunction status (detail description of conditions before and after malfunction occurs)
(7) All units have been strictly tested and proved to be qualified before ex-factory. To avoid unit damage or even
operation failure which may be caused by improper disassembly, please do not disassemble units by yourself. If
disassembly is needed, please contact our authorized serve centers for help.
(8) All graphics and information in this manual are only for reference. Manufacturer reserves the right for changes in
terms of sales or production at any time and without prior notice.
(9) If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
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.
DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of such
waste separately for special treatment is necessary.

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 Main Parts................................................................................................................................. 3
2.2 Combinations of Outdoor Units................................................................................................................ 3
2.3 Combinations of Indoor and Outdoor Units............................................................................................ 3
2.4 The Range of Production Working Temperature................................................................................... 4
3 Preparation before Installation ...........................................................................................5
3.1 Standard Parts............................................................................................................................................ 5
3.2 Installation Site............................................................................................................................................ 5
3.3 Piping Work Requirements..................................................................................................................... 10
4 Installation Instruction.......................................................................................................11
4.1 ODU Foundation....................................................................................................................................... 11
4.2 Physical Dimension of the Outdoor Unit and Mounting Hole............................................................. 12
4.3 Connection Pipe....................................................................................................................................... 13
4.4 Installation of the Connection Pipe........................................................................................................ 20
4.5 Air Purging and Refrigerant Charge...................................................................................................... 24
4.6 Electric Wiring............................................................................................................................................27
4.7 System Communication........................................................................................................................... 30
4.8 Connection Method and Steps for System Communication.............................................................. 34
4.9 External Electrical Wiring Diagram........................................................................................................ 41
4.10 Attention before operation..................................................................................................................... 43
5 Check Items after Installation and Trial Run...................................................................45
5.1 Check Items after Installation................................................................................................................. 45
5.2 Trial Run..................................................................................................................................................... 45
6 Common Malfunctions and Troubleshooting .................................................................55
7 Error Indication................................................................................................................... 57
8 Maintenance and Care .......................................................................................................62
8.1 Outdoor Heat Exchanger......................................................................................................................... 62
8.2 Drain Pipe.................................................................................................................................................. 62
8.3 Notice before Seasonal Use................................................................................................................... 62
8.4 Maintenance after Seasonal Use........................................................................................................... 62
8.5 Parts Replacement................................................................................................................................... 62
9 After-sales Service..............................................................................................................63

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1 Safety Precautions
WARNING
(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 nitrigen charge requirements. Charge nitrogen when welding pipes.
(6) Never short-circiut or cancel the pressure switch to prevent unit damage.
(7) Please firstly connect the wired controller before energization, otherwise wired controller cannot 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 5ºC(41ºF).
(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.

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(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, such as diluent or gas will damage the unit appearance. Only use soft cloth with a little neutral
detergent to clean the outer casing of unit.
(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.
(28) When the external heat exchanger or the air outlet are covered by ice or snow, be sure to clear the ice or snow
before starting the operation, otherwise it will damage the unit or invalid operation.
GREE will not assume responsibility of personal injury or equipment damage caused by improper
installation and commission, unnecessary service and incapable of following the rules and instructions
listed in this manual.

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2 Product Introduction
Gree Ultra Heat GMV Multi VRF Modular System (heat recovery serial) adopts inverter compressor
technology. According to change the displacement of compressor, step less capacity regulation within
range of 10%-100% can be realized. Various product lineup is provided with capacity range from 72K
Btu to 192K Btu, which can be widely used in working area and especially applicable to the place with
variable load change. Gree air conditioner is absolutely your best choice.
2.1 Names of Main Parts
Fig.1
NO.
①
②
③
④
⑤
Name
Fan, Motor
Electric Box
Assembly
Valve interface
Communication
code through-hole
Power cord
through-hole
2.2 Combinations of Outdoor Units
Single Model
GMV-VQ192WM/A-F(U)
Combined Model
GMV-VQ96W/A-F(U)+GMV-VQ96W/A-F(U)
2.3 Combinations of Indoor and Outdoor Units
ODU Model
Max number of connectable IDU (unit)
GMV-VQ72W/A-F(U)
12

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GMV-VQ96W/A-F(U)
17
GMV-VQ192WM/A-F(U)
34
The total capacity of indoor units should be within 50%~135% of that of outdoor units. While the rate
is over 100% and all IDUs are on run, the units cooling or heating capacity will be wakened.
Fig.2
Fig.2 is the combination view of the ODU of Ultra Heat GMV Multi VRF Modular System (heat
recovery serial) and the IDU of Multi VRF System. IDU can be cassette type, one-way cassette type,
wall-mounted type, duct type, etc. When any one IDU receives operation signal, ODU will start to work
according to the capacity; when all IDUs stop, ODU will also stop.
2.4 The Range of Production Working Temperature
Cooling operation
Ambient temperature: -10ºC(14ºF)~52ºC(125.6ºF)
Heating operation
Ambient temperature: -30ºC(-22ºF)~24ºC(75.2ºF)
Heat recovery operation
Ambient temperature: -10ºC(14ºF)~20ºC(68ºF)
When the indoor units are all VRF air processor, the unit operating range is as follows:
Cooling operation
Ambient temperature: 16ºC(60.8ºF)~45ºC(113ºF)
Heating operation
Ambient temperature: -7ºC(19.4ºF)~16ºC(60.8ºF)
NOTICE! Out of the working Temperature Range may damage this products and will
invalidate the warranty.
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).

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3 Preparation before Installation
Note: The picture is only used for reference and the actual product prevails. Unit: mm (inch).
3.1 Standard Parts
Please use the following standard parts supplied by Gree.
Parts for Outdoor Unit
Number
Name
Picture
Quantity
Remarks
1
Owner's Manual
1
2
Wiring (match with
resistance)
2
A resistance must be connected to
the last mode exchanger D1/D2
connecting with ODU.
Another resistance is connected to
the last system master ODU G1/G2
when multi-refrigeration systems
are connecting with the centralized
controller.
3.2 Installation Site
WARNING
Install the unit at a place where is adequate to withstand the weight of the unit and make sure the unit would not shake
or fall off.
Never expose the unit under direct sunshine and rainfall. Install the unit at a place where is against dust, typhoon and
earthquake.
Try to keep the unit away from combustible, inflammable and corrosive gas or exhaust gas.
Leave some space for heat exchanging and servicing so as to guarantee unit normal operation.
Keep the indoor and outdoor units close to each other as much as possible so as to decrease the pipe length and
bends.
Never allow children to approach to the unit and take measures to prevent children touching the unit.
3.2.1 Space requirement for the surround of outdoor unit
When the unit is surrounded by obstructions in four directions, please keep the distance between
the unit top and the top wall at least 3000mm (118-1/8inch) or above. And keep the distance between the
unit and the surrounded wall at least 1000mm (39-1/4inch) or above.
1) Space dimension for single-module unit

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Fig.3
2) Space dimension for dual-module unit
Fig.4
3.2.2 Space requirement for the top of outdoor unit
When the unit is located in a totally open space with no obstructions in four directions, keep the
distance between the unit top and wall at least 1500mm (59inch) or above (See Fig.5). When space is
limited within 1500mm (59inch) or the unit is not set in an open space, air return pipe is required to be
installed in order to keep good ventilation (See Fig.6).
Fig.5

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Fig.6
3.2.3 Space dimension for multiple-module unit
For keeping good ventilation, make sure there are no obstructions above the unit.
When the unit is located at a half-open space (front and left/right side is open), install the unit as per
the same or opposite direction.
Fig.7

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Fig.8
3.2.3 Take seasonal wind into consideration when installing the outdoor unit
1) Anti-monsoon installation requirements for unit not connecting exhaust duct
Fig.9

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Fig.10
2) Anti-monsoon installation requirements for unit connecting exhaust duct
Fig.11
3.2.4 Take snow into consideration when installing the outdoor unit

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Fig.12
3.3 Piping Work Requirements
There should be no fall among outdoor modules. Refer to the table below for piping work
requirements.
R410A Refrigeratn System
Outer diameter (mm/inch)
Wall thickness (mm)
Type
Φ6.35(1/4)
≥0.8
0
Φ9.52(3/8)
≥0.8
0
Φ12.70(1/2)
≥0.8
0
Φ15.9(5/8)
≥1.0
0
Φ19.05(3/4)
≥1.0
1/2H
Φ22.2(7/8)
≥1.2
1/2H
Φ25.40(1/1)
≥1.2
1/2H
Φ28.60(9/8)
≥1.2
1/2H
Φ31.80(5/4)
≥1.3
1/2H
Φ34.90(11/8)
≥1.3
1/2H
Φ38.10(12/8)
≥1.5
1/2H
Φ41.30(13/8)
≥1.5
1/2H
Φ44.5(7/4)
≥1.5
1/2H
Φ51.4(7/4)
≥1.5
1/2H
Φ54.1(17/8)
≥1.5
1/2H

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4 Installation Instruction
4.1 ODU Foundation
The concrete foundation of the ODU must be strong enough. Ensure that the drainage is smooth
and that the ground drainage or floor drainage is not affected.
Requirements on the concrete foundation are as follows:
1) The concrete foundation must be flat and have enough rigidity and strength to undertake the
unit’s weight during running. The height of the foundation is 200mm to 300mm, which is
determined based on the size of the unit.
2) Build a drainage ditch around the foundation to discharge the condensate water.
3) If the air conditioner is installed on the roof, check the intensity of the building and take
waterproof measures.
4) If a u-steel foundation is adopted, the structure must be designed with sufficient rigidity and
strength.
Fig.13

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4.2 Physical Dimension of the Outdoor Unit and Mounting Hole
Outline and physical dimension of GMV-VQ72W/A-F(U)、GMV-VQ96W/A-F(U) :
Fig.14

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4.3 Connection Pipe
4.3.1 Schematic diagram of piping connection
High pressure gas pipe
Liquid pipe
Outdoor
connection pipe
Lowpressure gaspipe
Branch between indoor units
Connection pipe between outdoor
branch and the first indoorbranch
Connection pipe between indoorbranch and indoor units
Mode
exchanger
Mode
exchanger
Mode
exchanger
Indoor
unit 1
Indoor
unit 2
Indoor
unit 3
Indoor
unit 4
Indoor
unit 5
Indoor
unit 6
Connection pipe between mode
exchanger and indoorunits
Connection pipe between indoorbranchs
Connection pipe between indoorbranch and mode exchanger
Connection pipe between mode
exchanger and indoorbranch
Connection pipe between indoorbranchs
Connection pipe between indoorbranchs
Connection pipe between
mode exchangerand indoor units
Connection pipe between indoorbranch and indoor units
Module1Module 2
Branchbetween
outdoorunits
Fig.15
4.3.2 Schematic diagram of piping sequence
GMV-VQ72W/A-F(U)、GMV-VQ96W/A-F(U) :
Fig.16

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4.3.3 Allowable pipe length and drop height among indoor and outdoor units
Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown in
the figure below.
Remark: Equivalent length of one Y-type manifold is about 0.5m (1-3/4feet).
Fig.17
L12: Length from the first branch to the farthest IDU; L11: Length from the first branch to the nearest
IDU; Equivalent length of branch of IDU is 0.5m (1-3/4feet).
Equivalent length of mode exchanger depends on the using situation, for example, when using one
branch, the length is 1m (39-3/8 inch), when using N branches, the length is N meters.
.
R410A Refrigerant System
Allowable Value
m(feet)
Fitting Pipe
Total length (actual length) of fitting pipe
≤1000(3280-3/4)
L1+L2+L3+L4+…+L10+A11+A12+…+D21+D22
Length of farthest
fitting pipe m(feet)
Actual length
≤165(541-1/4)
L
Equivalent length
≤190(623-1/4)
Difference between the pipe length from the
first branch of IDU to the farthest IDU and the
pipe length from the first branch of IDU to the
nearest IDU
≤40(131-1/4)
L12-L11
Equivalent length from the first branch to the
furthest piping (1)
≤40(131-1/4)
L7+L8+L10+D22
Height difference
between outdoor
unit and indoor unit
Outdoor unit at upper(2)
≤50(164)
——
Outdoor unit at lower(2)
≤40(131)
——

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Height difference between indoor units
≤15(49)
h1
Maximum length of Main pipe(3)
≤90(295-1/4)
L1
From IDU to its nearest branch (4)
≤40(131-1/4)
A11,A12,B21,B22,D21,D22
Notices:
(1) Normally, the pipe length from the first branch of IDU to the farthest IDU is 40m (131-1/4feet).
Under the following conditions, the length can reach 90m (295-1/4feet).
1) Actual length of pipe in total: L1+L2x2+L3x2+L4x2+…+L9x2+L10 x2+A11+A12+…+D21+D22≤
1000m (3280- 3/4feet).
2) Length between each IDU and its nearest branch A11, A12, B11, B21, B22, B31, C11, D11, D21,
D22≤40m(131- 1/4feet).
3) Difference between the pipe length from the first branch of IDU to the farthest IDU and the pipe
length from the first branch of IDU to the nearest IDU: L12-L11≤40m (131-1/4feet).
(2) When the outdoor unit is at upper side and height difference is more than 50m, please consult
company for the related technical requirement.
(3) When the maximum length of the main pipe from ODU to the first branch of IDU is ≥50m (164
ft), then adjust the pipe size.
Total rated capacity of
ODU: C (Btu/h)
Pipe between outdoor unit and the first indoor branch
Low pressure gas pipe
mm(inch)
Liquid pipe mm(inch)
High pressure gas pipe
mm(inch)
GMV-VQ72W/A-F(U)
No need to enlarge pipe size
No need to enlarge pipe size
Φ22.2(7/8)
GMV-VQ96W/A-F(U)
No need to enlarge pipe size
No need to enlarge pipe size
Φ22.2(7/8)
GMV-VQ192WM/A-F(U)
Φ34.9(1-3/8)
Φ19.05(3/4)
Φ31.8(1-1/4)
(4) If the length between an IDU and its nearest branch is above 10m (32-4/5feet), then increase the
size of the liquid pipe of IDU (only for the pipe size that is≤6.35mm (1/4inch).
4.3.4 Connection pipe among outdoor modules
Fig.18