GREE ELECTRIC GMV-V72W/A-F(U) 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
R 410A Systems―Outdoor Unit
Air Conditioners
GMV-V72W/A-F(U)
GMV-V96W/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.

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.

Contents
1 Safety Precautions ...............................................................................................................1
2 Product Introduction............................................................................................................3
2.1 Names of Main Parts ................................................................................................................................. 3
2.2 Combinations of Indoor and Outdoor Units............................................................................................ 3
2.3 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....................................................................................................................... 8
4 Installation Instruction.........................................................................................................9
4.1 Physical Dimension of the Outdoor Unit and Mounting Hole............................................................... 9
4.2 Connection Pipe......................................................................................................................................... 9
4.3 Installation of the Connection Pipe........................................................................................................ 13
4.4 Air Purging and Refrigerant Charge...................................................................................................... 18
4.5 Electric Wiring........................................................................................................................................... 20
4.6 System Communication........................................................................................................................... 23
4.7 Connection Method and Steps for System Communication.............................................................. 26
4.8 External Electrical Wiring Diagram........................................................................................................ 30
5 Check Items after Installation and Trial Run...................................................................32
5.1 Check Items after Installation................................................................................................................. 32
5.2 Trial Run..................................................................................................................................................... 32
6 Common Malfunctions and Troubleshooting .................................................................41
7 Error Indication...................................................................................................................43
8 Maintenance and Care .......................................................................................................47
8.1 Outdoor Heat Exchanger..........................................................................................................................47
8.2 Drain Pipe...................................................................................................................................................47
8.3 Notice before Seasonal Use....................................................................................................................47
8.4 Maintenance after Seasonal Use............................................................................................................47
8.5 Parts Replacement....................................................................................................................................47
9 After-sales Service..............................................................................................................48

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1 Safety Precautions
WARNING
(1) Follow this instruction to complete the installation work. Please carefully read this manual before unit startup and
service.
(2) Wire size of power cord should be large enough. The damaged power cord and connection wire should be replaced
by exclusive cable.
(3) After connecting the power cord, please fix the electric box cover properly in order to avoid accident.
(4) Never fail to comply with the nitrigen charge requirements. Charge nitrogen when welding pipes.
(5) Never short-circiut or cancel the pressure switch to prevent unit damage.
(6) Please firstly connect the wired controller before energization, otherwise wired controller cannot be used.
(7) Before using the unit, please check if the piping and wiring are correct to avoid water leakage, refrigerant leakage,
electric shock, or fire etc..
(8) Do not insert fingers or objects into air outlet/inlet grille.
(9) 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.
(10) Never start up or shut off the air conditioner by means of directly plug or unplug the power cord.
(11) Turn off the unit after it runs at least five minutes; otherwise it will influence oil return of the compressor.
(12) Do not allow children operate this unit.
(13) Do not operate this unit with wet hands.
(14) Turn off the unit or cut off the power supply before cleaning the unit, otherwise electric shock or injury may happen.
(15) Never spray or flush water towards unit, otherwise malfunction or electric shock may happen.
(16) Do not expose the unit to the moist or corrosive circumstances.
(17) 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).
(18) 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.
(19) 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.
(20) 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.
(21) Be sure to use the exclusive accessory and part to prevent the water leakage, electric shock and fire accidents.
(22) 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.

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(23) 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).
(24) If refrigerant leakage happens during installation, please ventilate immediately. Poisonous gas will emerge if the
refrigerant gas meets fire.
(25) 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.
(26) 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.
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 System 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 96K 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 Indoor and Outdoor Units
ODU Model
Max number of connectable IDU (unit)
GMV-V72W/A-F(U)
12
GMV-V96W/A-F(U)
17
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.

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Fig.2
Fig.2 is the combination view of the ODU of Modular DC Inverter Multi VRF System 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.
2.3 The Range of Production Working Temperature
Cooling operation
Ambient temperature: -10ºC(14ºF)~52ºC(125.6ºF)
Heating operation
Ambient temperature: -30ºC(-22ºF)~24ºC(75.2ºF)
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
One must be connected to the D1/D2
of ODU, the other must be connected
to the last IDU of communication
connection D1/D2.
3
Mark (master)
2
Attach on the wired controller of
master IDU or on the front panel
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 When the outdoor unit is totally surrounded by walls, please refer to following figures
for space dimension.

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Fig.3
3.2.2 When there is wall (or similar obstruction) above the unit, keep the distance between
the unit top and the wall at least 300mm (11-3/4inch) or above.
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.4). 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.5).
Fig.4

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Fig.5
3.2.3 Take seasonal wind into consideration when installing the outdoor unit
Fig.6
3.2.4 Take snow into consideration when installing the outdoor unit
Fig.7

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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
0
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 Physical Dimension of the Outdoor Unit and Mounting Hole
Outline and Physical Dimention of GMV-V72W/A-F(U)、GMV-V96W/A-F(U) :
Fig.8
4.2 Connection Pipe
4.2.1 Schematic Diagram of Piping Connection
Gas pipe
Liquid pipe
Outdoor
connection pipe
Branch between indoor units
Connectionpipe between indoor branch and indoor units
Indoor
unit 1
Indoor
unit 2
Indoor
unit 3
Connectionpipe between indoor branchs
Connectionpipe between indoor branchs
Connectionpipe between indoor branch and indoor units
Module1
Fig.9

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4.2.2 Schematic Diagram of Piping Sequence
GMV-V72W/A-F(U)、GMV-V96W/A-F(U) :
Fig.10
4.2.3 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.11

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L10: 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).
.
R410A Refrigerant System
Allowable Value
m(feet)
Fitting Pipe
Total length (actual length) of fitting pipe
≤1000(3280-3/4)
L1+L2+L3+L4+…+L9+a+b+…+i+j
Length of farthest
fitting pipe m(feet)
Actual length
≤165(541-1/4)
L1+L6+L7+L8+L9+j
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)
L10-L11
Equivalent length from the first branch to the
furthest piping (1)
≤40(131-1/4)
L6+L7+L8+L9+j
Height difference
between outdoor
unit and indoor unit
Outdoor unit at upper(2)
≤90(295-1/4)
——
Outdoor unit at lower(2)
≤90(164-1/24)
——
Height difference between indoor units
≤30(98-2/4)
——
Maximum length of Main pipe(3)
≤90(295-1/4)
L1
From IDU to its nearest branch (4)
≤10(32-3/4)
a, b, c, d, e, f, g, h, i, j
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+L2×2+L3×2+L4×2+…+L9×2+a+b+…+i+j≤1000m (3280-
3/4feet).
2) Length between each IDU and its nearest branch a, b, c, d, e, f, g, h, i, j≤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: L10-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 ≥90m
(295-1/4ft), then adjust the pipe size.
Total rated capacity of ODU: C
(Btu/h)
Pipe between outdoor unit and the first indoor branch
Gas pipe mm(inch)
Liquid pipe mm(inch)
C≤72000
No need to enlarge pipe size
No need to enlarge pipe size
72000＜X≤96000
No need to enlarge pipe size
Φ12.7(1/2)
96000＜X≤120000
No need to enlarge pipe size
Φ15.9(5/8)
(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).
4.2.4 Size requirement for branch pipe and piping (main pipe)
4.2.4.1 Connection sketch map of single-module system

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Fig.12 (a)
Fig.12 (b)
4.2.4.2 Select appropriate pipe between outdoor unit and the first indoor branch (“L”) as per the pipe size
of outdoor unit. Pipe size of basic outdoor module is shown as follows:
Pipe between outdoor unit and the first indoor branch:
Basic module
Pipe between outdoor unit and the first indoor branch
Gas pipe mm(inch)
Liquid pipe mm(inch)
GMV-V72W/A-F(U)
Φ28.6(1-1/8)
Φ9.52(3/8)
GMV-V96W/A-F(U)
Φ28.6(1-1/8)
Φ9.52(3/8)
4.2.4.3 Branch selection of mode exchanger (“A1, A2, A3”)
Select branch of mode exchanger as per total capacity of downstream indoor unit(s). Please refer to
the following table.
R410A refrigerant system
Total Capacity of the Downstream Indoor Unit X(Btu/h)
Model
Y-type Branch Pipe
C≤68000
FQ01A/A
68000＜C≤102000
FQ01B/A

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102000＜C≤239000
FQ02/A
239000＜C
FQ03/A
T-type Branch Pipe
C≤136000
FQ014/H1
136000＜C≤232000
FQ018/H1
232000＜C
FQ018/H2
4.2.4.4 Piping size among upstream branches (”b, e”)
Total rated capacity of downstream
indoor units: X(Btu/h)
Size of connection pipe between branches
Gas pipe mm(inch)
Liquid pipe mm(inch)
X≤17100
Φ12.7(1/2)
Φ6.35(1/4)
17100＜X≤48500
Φ15.9(5/8)
Φ9.52(3/8)
48500＜X≤72000
Φ19.05(3/4)
Φ9.52(3/8)
72000＜X≤96000
Φ22.2(7/8)
Φ9.52(3/8)
96000＜X≤144000
Φ28.6(1-1/8)
Φ12.7(1/2)
144000＜X≤216000
Φ28.6(1-1/8)
Φ15.9(5/8)
216000＜X≤240000
Φ34.9(1-3/8)
Φ15.9(5/8)
240000＜X≤336000
Φ34.9(1-3/8)
Φ19.05(3/4)
336000＜X
Φ41.3(1-5/8)
Φ19.05(3/4)
4.2.4.5 Piping between branch and indoor unit (“a、c、d”)
Rated capacity of indoor units:
X ((Btu/h)
Size of connection pipe between indoor branch and indoor unit
Gas pipe mm(inch)
Liquid pipe mm(inch)
X≤9500
Φ9.52(3/8)
Φ6.35(1/4)
9500＜X≤17100
Φ12.7(1/2)
Φ6.35(1/4)
17100＜X≤48500
Φ15.9(5/8)
Φ9.52(3/8)
48500＜X≤72000
Φ19.05(3/4)
Φ9.52(3/8)
72000＜X
Φ22.2(7/8)
Φ9.52(3/8)
4.3 Installation of the Connection Pipe
4.3.1 Precautions when installing the connection pipe
(1) Conform to the following principles during piping connection: Connection pipeline should be as
short as possible. The height difference between indoor and outdoor units should be as short as possible.
Keep number of bends as little as possible. The radius of curvature should be as large as possible.
(2) Weld the connection pipes between indoor and outdoor unit. Please strictly conform to the
requirements for welding process. Rosin joints and pin holes are not allowable.
(3) When laying the pipes, be careful not to deform them. The radius of bending parts should be
more than 200mm (7-7/8inch). The pipes cannot be repeatedly bent or stretched, otherwise the material
will get harden. Do not bend or stretch the pipe over three times at the same position.

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(4) Please use a torque wrench to connect union nut on the indoor unit. See Fig.13.
Fig.13
1) Align the expansion end of copper pipe with the center of threaded joint. Tighten the flare nuts
with your hands.
2) Tighten the flare nuts with torque wrench until you hear "click" sound.
3) Use sponge to wrap the connecting pipe and joints without thermal insulation and tie it up with
plastic tape.
4) A mounting support for the connection pipe is required.
5) The curvature degree of connection pipe should not be small, otherwise the pipe might crack.
Installation personnel should use tube bender when bending the pipe.
6) Don't forcibly stretch the pipe joint, otherwise indoor capillary or other pipes might be damaged
and lead to refrigerant leakage.
4.3.2 Manifold
(1) Y-type manifold, see Fig.14 (a); T-type manifold, see Fig.14 (b).
Fig.14 (a)
Fig.14 (b)

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(2) Y-type manifold has serveral pipe sections with different pipe size, which facilitates to match with
various copper pipe. Use pipe cutter to cut in the middle of the pipe section with different pipe size and
deburr as well. See Fig.15 (a). Y-type manifold must be installed vertically or horizontally.
(3) T-type manifold must be installed horizontally with inclination. See Fig.15 (b).
Fig.15 (a)
Fig.15 (b)
(4) Manifold is isolated by insulating material that can bear 120ºC(248℉)or higher temperature.
Manifold attached foam cannot be taken as insulating material.
4.3.3 Thermal insulation for pipeline
(1) For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.
(2) At the manifold inlet, at least leave 500mm (19-11/16inch) straight pipe section, and for FQ04
manifold, keep it at least 800mm (31-1/2inch).

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Fig.16 (a)
Fig.16 (b)
(3) There must be three fixing point for both horizontal and vertical installation of Y-type manifold.
See Fig.17.
Fixing point 1: 100mm (4in.) on the main inlet manifold from the welding point.
Fixing point 2: 200mm (7-7/8in.) on the main branched manifold from the welding point.
Fixing point 3: 250mm(9-5/6in.) on the branched pipe from the welding point.
Fig.17
(4) Suspend the header to the ceiling, and be sure to install T-type manifold so that the outlet pipes
are horizontal at the lower side. See Fig.18.

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Fig.18 (a)
Fig.18 (b)
(5) Thermal insulation for pipeline
1) To avoid condensate or water leakage on connecting pipe, the gas pipe and liquid pipe must be
wrapped with thermal insulating material and adhesive pipe for insulation from the air.
2) For heat pump unit, liquid pipe should bear 70ºC(158℉) or above, and gas pipe should bear 120
ºC(248℉) or above. For cooling only unit, both liquid pipe and gas pipe should bear 70ºC(158℉)
or above. Example: Polyethylene foam can bear 120ºC(248℉) above and foaming polyethylene
can bear 100ºC(212℉) above.
3) Joints at indoor and outdoor units should be wrapped with insulating material and leave no
clearance between pipe and wall. See Fig.19.
Fig.19