Gree Ultra Heat GMV Multi VRF Heat Recovery... User manual

Ultra Heat GMV Multi VRF
TECHNICAL SERVICE MANUAL (R410A)
——Heat Recovery Series

Installation, Commissioning, and Maintenance
Manual for Ultra Heat GMV
Multi VRF Units
For North America
Refrigeration Research Department
July, 2016
Gree Electric Appliances, Inc. of Zhuhai

I
CONTENTS
PREFACE.................................................................................................................................................................. 1
SAFTY PRECAUTIONS.......................................................................................................................................... 1
CHAPTER 1 INTRODUCTION TO BASIC FEATURES OF UNITS................................................................. 7
1 BASIC OPERATING PRINCIPLE............................................................................................................... 7
2 INTERNAL PIPING DESIGN OF THE UNITS.......................................................................................... 8
3 BASIC PARAMETERS OF UNIT.............................................................................................................. 12
4 ELECTRICAL PARAMETERS.................................................................................................................. 15
5 OPTIONAL ACCESSORIES ..................................................................................................................... 17
6 BASIC REQUIREMENT FOR PIPE CONNECTION ............................................................................. 17
7 PRECAUTIONS ON REFRIGERANT LEAKAGE ................................................................................. 19
8 UNIT OPERATING TEMPERATURE....................................................................................................... 20
CHAPTER 2 INSTALLATION............................................................................................................................... 23
PART 1 ENGINEERING INSTALLATION PREPARATION..................................................................... 23
1 INSTALLATION SAFETY .......................................................................................................................... 23
2 IMPORTANCE OF INSTALLATION ENGINEERING............................................................................ 23
3 COOPERATION BETWEEN DIFFERENT PROFESSIONS................................................................ 24
4 ONSITE REVIEW OF DESIGN DRAWING............................................................................................. 27
5 CONSTRUCTION ORGANIZATION PROCESS.................................................................................... 28
PART 2 MATERIAL SELECTIONS ............................................................................................................. 29
1 REQUIREMENT FOR SELECTING CONSTRUCTION MATERIALS................................................ 29
2 REQUIREMENT FOR SELECTING MAJOR MATERIALS.................................................................. 29
PART 3 INSTALLATION SPACE REQUIREMENTS................................................................................ 31
1 PLACE SELECTION FOR INSTALLING ODU ...................................................................................... 31
2 ODU DIMENSIONS AND INSTALLATION HOLE SIZE....................................................................... 31
PART 4 REQUIREMENTS ON FOUNDATION INSTALLATION............................................................ 39
1 ODU FOUNDATION.................................................................................................................................... 39
2 ODU FIXING................................................................................................................................................. 40
3 VIBRATION REDUCTIONS FOR ODU ................................................................................................... 40
PART 5 PIPING CONNECTION................................................................................................................... 41
1 SCHEMATIC DIAGRAM OF PIPING CONNECTION ........................................................................... 41
2 SCHEMATIC DIAGRAM OF PIPING SEQUENCE................................................................................ 41
3 ALLOWABLE PIPE LENGTH AND DROP HEIGHT AMONG IDU AND ODU................................. 42
4 CONNECTION PIPE AMONG ODU MODULES.................................................................................... 43
5 SIZE REQUIRMENT FOR FITTING PIPE AND BRANCH................................................................... 44
PART 6 PIPE INSTALLATION AND INSULATION................................................................................... 49
1 PIPE INSTALLATION FOR THE COOLING SYSTEM ......................................................................... 49
2 PIPE INSTALLATIONS FOR THE CONDENSATE WATER SYSTEM .............................................. 57
3 INSULATION SYSTEM .............................................................................................................................. 60
PART 7 ELECTRIC AND CONTROLLER INSTALLATION.................................................................... 62
1 PRECAUTION ............................................................................................................................................. 62
2 INSTALLATION OF THE POWER CABLE............................................................................................. 63
3 INSTALLATION OF THE COMMUNICATION SYSTEM....................................................................... 67
PART 8 VACUUMIZATION AND DESICCATION FOR THE REFRIGERANT SYSTEM.................... 77
1 AIR-TIGHTNESS TEST.............................................................................................................................. 77
2 VACUUMIZATION AND DESICCATION FOR THE SYSTEM............................................................. 78
PART 9 REFRIGERANT PERFUSION....................................................................................................... 80
1 CALCULATION METHOD FOR PERFUSING REFRIGERANT ......................................................... 80

II
2 METHOD FOR PERFUSING REFRIGERANT....................................................................................... 81
CHAPTER 3 COMMISSIONING OPERATION.................................................................................................. 86
PART 1 SECURITY REQUIREMENTS....................................................................................................... 86
1 PRECAUTIONS FOR CONSTRUCTION................................................................................................ 86
2 PRECAUTIONS FOR THE USE OF REFRIGERANTS........................................................................ 86
3 FUNCTION SETTINGS OF ODUS........................................................................................................... 86
PART 2 COMMISSIONING PROCESS ...................................................................................................... 97
1 NECESSITY OF VRF ENGINEERING COMMISSIONING .................................................................. 97
2 REQUIRED FILES AND TOOLS FOR ENGINEERING DEBUGGING.............................................. 97
3 ENGINEERING COMMISSIONING PROCEDURES ............................................................................ 98
CHAPTER 4 MAINTENANCE............................................................................................................................ 117
PART 1 FAILURE CODE TABLE .............................................................................................................. 117
1 SYSTEM FAILURE CODE TABLE......................................................................................................... 117
2 ODU LEDS TABLE................................................................................................................................... 121
PART 2 EXCEPTIONS AND TROUBLESHOOTING ............................................................................. 123
1 HOW TO LOCATE A FAULTY IDU PROMPTLY.................................................................................. 123
2 EXCEPTIONS ANALYZING AND TROUBLESHOOTING................................................................. 124
PART 3 KEY PARTS MAINTENANCE..................................................................................................... 143
1 CAUTIONS ON CONTROLLER REPLACEMENT.............................................................................. 143
2 COMPRESSOR REPLACEMENT AND CAUTIONS.......................................................................... 146
3 CAUTIONS ON COMPRESSOR DRIVE BOARD AND PFC BOARD REPLACEMENT ............. 161
4 ASSEMBLING AND DISASSEMBLING KEY PARTS OF ODUS..................................................... 166
5 UNIT MAINTENANCE.............................................................................................................................. 178
PART 4 APPENDIXES................................................................................................................................. 179
1 MINUTES ABOUT A DEBUG SOLUTION CONFIRMATION MEETING......................................... 179
2 VISUAL INSPECTION CHECKLIST OF THE DEBUG SYSTEM ..................................................... 179
3 DEBUG PARAMETER RECORD LIST ................................................................................................. 180
4 COMMON PARAMETER LISTS............................................................................................................. 181
5 EXPLODED VIEWS AND SPARE PART LIST .................................................................................... 192

Ultra Heat GMV VRF Technical Service Manua_Heat Recovery Serial PREFACE AND SAFTY PRECAUTIONS
1
PREFACE
This manual specifies safe operation requirements for Ultra Heat GMV VRF units from perspectives
of engineering and installation, commissioning and maintenance, as well as basic principles and
implementation methods. Professional operators must abide by relevant national (local) safety
requirements and technical specifications set forth in this manual during operations; otherwise, the air
conditioning system may fail or be damaged, and personnel safety accident may also occur.
SAFTY PRECAUTIONS
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
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.

Ultra Heat GMV VRF Technical Service Manua_Heat Recovery Serial PREFACE AND SAFTY PRECAUTIONS
2
Installation
Have all electric work done by a licensed electrician according to "Electric Facility Engineering
Standard" and "Interior Wire Regulations" and the instructions given in this manual and always
use a special circuit.
If the power source capacity is inadequate or electric work is performed improperly, electric shock or fire
may result.
Ask the dealer or an authorized technician to install the air conditioner.
Improper installation by the user may result in water leakage, electric shock, or fire.
Always ground the product.
There is risk of fire or electric shock.
Always install a dedicated circuit and breaker.
Improper wiring or installation may cause fire or electric shock.
For re-installation of the installed product, always contact a dealer or an Authorized Service
Center.
There is risk of fire, electric shock, explosion, or injury.
Do not install, remove, or re-install the unit by yourself (customer).
There is risk of fire, electric shock, explosion, or injury.
Do not store or use flammable gas or combustibles near the air conditioner.
There is risk of fire or failure of product.
Use the correctly rated breaker or fuse.
There is risk of fire or electric shock.
Prepare for strong wind or earthquake and install the unit at the specified place.
Improper installation may cause the unit to topple and result in injury.
Do not install the product on a defective installation stand.
It may cause injury, accident, or damage to the product.
When installing and moving the air conditioner to another site, do not charge it with a different
refrigerant from the refrigerant specified on the unit.
If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction
and the unit may be damaged.
Do not reconstruct to change the settings of the protection devices.
If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or
parts other than those specified by GREE are used, fire or explosion may result.
Ventilate before operating air conditioner when gas leaked out.
It may cause explosion, fire, and burn.
Securely install the cover of control box and the panel.
If the cover and panel are not installed securely, dust or water may enter the outdoor unit and fire or
electric shock may result.

Ultra Heat GMV VRF Technical Service Manua_Heat Recovery Serial PREFACE AND SAFTY PRECAUTIONS
3
If the air conditioner is installed in a small room, measures must be taken to prevent the
refrigerant concentration from exceeding the safety limit when the refrigerant leaks.
Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded.
Should the refrigerant leak and cause the safety limit to be exceeded, hazards due to lack of oxygen in
the room could result.
Operation
Do not damage or use an unspecified power cord.
There is risk of fire, electric shock, explosion, or injury.
Use a dedicated outlet for this appliance.
There is risk of fire or electrical shock.
Be cautious that water could not enter the product.
There is risk of fire, electric shock, or product damage.
Do not touch the power switch with wet hands.
There is risk of fire, electric shock, explosion, or injury.
When the product is soaked (flooded or submerged), contact an Authorized Service Center.
There is risk of fire or electric shock.
Be cautious not to touch the sharp edges when installing.
It may cause injury.
Take care to ensure that nobody could step on or fall onto the outdoor unit.
This could result in personal injury and product damage.
Do not open the inlet grille of the product uring operation. (Do not touch the electrostatic filter, if
the unit is so equipped.)
There is risk of physical injury, electric shock, or product failure.

Ultra Heat GMV VRF Technical Service Manua_Heat Recovery Serial PREFACE AND SAFTY PRECAUTIONS
4
Installation
Always check for gas (refrigerant) leakage after installation or repair of product.
Low refrigerant levels may cause failure of product.
Do not install the product where the noise or hot air from the outdoor unit could damage the
neighborhoods.
It may cause a problem for your neighbors.
Keep level even when installing the product.
To avoid vibration or water leakage.
Do not install the unit where combustible gas may leak.
If the gas leaks and accumulates around the unit, an explosion may result.
Use power cables of sufficient current carrying capacity and rating.
Cables that are too small may leak, generate heat, and cause a fire.
Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a
consumer air conditioner, not a precision refrigeration system.
There is risk of damage or loss of property.
Keep the unit away from children. The heat exchanger is very sharp.
It can cause the injury, such as cutting the finger. Also the damaged fin may result in degradation of
capacity.
When installing the unit in a hospital, communication station, or similar place, provide sufficient
protection against noise.
The inverter equipment, private power generator, high-frequency medical equipment, or radio
communication equipment may cause the air conditioner to operate erroneously, or fail to operate. On
the other hand, the air conditioner may affect such equipment by creating noise that disturbs medical
treatment or image broadcasting.
Do not install the product where it is exposed to sea wind (salt spray) directly.
It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins,
could cause product malfunction or inefficient operation.
Operation
Do not use the air conditioner in special environments.
Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the air conditioner or damage
its parts.
Do not block the inlet or outlet.
It may cause failure of appliance or accident.
Make the connections securely so that the outside force of the cable may not be applied to the
terminals.

Ultra Heat GMV VRF Technical Service Manua_Heat Recovery Serial PREFACE AND SAFTY PRECAUTIONS
5
Inadequate connection and fastening may generate heat and cause a fire.
Be sure the installation area does not deteriorate with age.
If the base collapses, the air conditioner could fall with it, causing property damage, product failure, or
personal injury.
Install and insulate the drain hose to ensure that water is drained away properly based on the
installation manual.
A bad connection may cause water leakage.
Safely dispose of the packing materials.

Tear apart and throw away plastic packaging bags so that children may not play with them. If children
play with a plastic bag which was not torn apart, they face the risk of suffocation.
Turn on the power at least 8 hours before starting operation.
Starting operation immediately after turning on the main power switch can result in severe damage to
internal parts. Keep the power switch turned on during the operational season.
Be very careful about product transportation.
Only one person should not carry the product if it weighs more than 44lbs (20kg).
Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It
is dangerous.
Do not touch the heat exchanger fins. Doing so may cut your fingers.
When transporting the outdoor unit, suspend it at the specified positions on the unit base. Also support
the outdoor unit at four points so that it cannot slip sideways.
Do not touch any of the refrigerant piping during and after operation.
It can cause a burn or frostbite.
Do not operate the air conditioner with the panels or guards removed.
Rotating, hot, or high-voltage parts can cause injuries.
Do not directly turn off the main power switch after stopping operation.
Wait at least 5 minutes before turning off the main power switch. Otherwise it may result in water
leakage or other problems.
Auto-addressing should be done in condition of connecting the power of all indoor and outdoor
units. Auto-addressing should also be done in case of changing the indoor unit PCB. Use a firm
stool or ladder when cleaning or maintaining the air conditioner.
Be careful and avoid personal injury.
Do not insert hands or other objects through the air inlet or outlet while the air conditioner is
plugged in.
There are sharp and moving parts that could cause personal injury.

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
6
CHAPTER 1
INTRODUCTION TO
BASIC FEATURES
OF UNITS

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
7
CHAPTER 1 INTRODUCTION TO BASIC FEATURES OF UNITS
1 BASIC OPERATING PRINCIPLE
The operating principle is as follows: When an indoor unit (IDU) is operating in cooling mode, the
outdoor unit (ODU) can correspondingly enable the outdoor module based on the operating load
requirement of the IDU. The outdoor heat exchanger serves as a system condenser, and the heat
exchangers of cooling IDUs are connected in parallel to serve as a system evaporator. The circulation of
air supply and air return of the IDU is performed to adjust the indoor temperature and humidity. When an
IDU is operating in heating mode, all four-way valves in the ODU module are switched into energized
status. The outdoor heat exchange serves as the system evaporator, and the heat exchanger of the IDU
serves as the system condenser. The circulation of air supply and air return of the IDU is performed to
adjust the indoor temperature and humidity.
MODELS LIST:
Model Name
Product Code
Power Supply
(V, Ph, Hz)
Appearance
GMV-VQ72W/A-F(U)
CN851W1730
208/230V 3ph 60Hz
GMV-VQ96W/A-F(U)
CN851W1740
208/230V 3ph 60Hz
NCHS1B(U)
EN04001120
208/230V 1Ph 60Hz
NCHS2B(U)
EN01600010
208/230V 1Ph 60Hz
NCHS4B(U)
EN04001130
208/230V 1Ph 60Hz
NCHS8B(U)
EN04001140
208/230V 1Ph 60Hz

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
8
2 INTERNAL PIPING DESIGN OF THE UNITS
2.1 Piping Design of GMV-VQ72W/A-F(U) 、GMV-VQ96W/A-F(U)
2.1.1 Piping diagram
2.1.2 Names and main functions of components
No.
Name
Main Function
1
Compressor
Adjusts its own rotational speed based on the actual requirement of the system to
implement capacity control.
2
Compressor heat tape
Maintains a proper oil temperature in the compressor when the compressor is in
standby status, ensuring the reliability during compressor startup.
3
Exhaust pipe temperature
sensor of compressor
Detects a compressor's exhaust gas temperature for compressor control and
protection.
4
High-pressure circuit breaker
Protects a compressor by sending feedback signal to stop the system when the
compressor's discharge pressure exceeds the operating value of high-pressure
circuit breaker.
5
Oil extractor
Separates the gas and oil in the system to ensure compressor reliability.
6
Accumulator
Refrigerant adjustment.

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
9
7
One-way valve
Prevents high-pressure gas from entering the compressor and fast balances the
suction pressure and discharge pressure in a compressor.
8
High-pressure sensor
Detects the high pressure value in the system in real time mode for compressor
protection and other control functions.
9
Four-way valve 1
Used for the switching between the cooling and heating functions of system IDU.
10
Heat exchanger
Used for outdoor heat exchange.
11
Fan
Strengthens heat exchanging.
12
Defrosting temperature sensor
Used for defrosting detection.
13
Electronic expansion valve for
heating
Controls refrigerant adjustment in heating mode.
14
One-way valve
Controls refrigerant flow direction.
15
Unloading valve
Opening if the pressure inside the liquid pipe /gas pipe is too high.
16
Sub cooler electronic
expansion valve
Reduces the pressure and temperature of ramous refrigerant to cool the main
branch refrigerant.
17
Sub cooler
Controls the degree of sub cooling of tube.
18
Liquid outlet temperature
sensor of sub cooler
Detects tube temperature.
19
Middle-pressure sensor
Detects system middle pressure.
20
Gas outlet temperature sensor
of sub cooler
Detects gas temperature of sub cooler.
21
Compensate vapor valve
Used for compensating vapor for second compression.
22
Sub-cooling valve
Used for providing with sub-cooling liquid.
23
Low-pressure sensor
Detects system low pressure to avoid extra-low operating pressure.
24
Gas-liquid separator
Separate gas and liquid to prevent the system from running when the refrigerant
flows back to the compressor.
25
Outlet temperature sensor of
gas-liquid separator
Detects internal status of gas-liquid separator to further control the compressor
suction performance.
26
Oil return valve 1
Oil return control for the compressor.
27
Inlet temperature sensor of
gas-liquid separator
Detects inlet temperature of gas-liquid separator.
28
Fusible plug
Opening if the pressure or the temperature inside the accumulator or liquid-gas
separator is too high.
29
One-way valve
Controls refrigerant flow direction.
30
One-way valve
Controls refrigerant flow direction.
31
Liquid intake valve
Liquid intake control valve for refrigerant adjustment tank.
32
Pressure valve
Pressure control valve for refrigerant adjustment tank.
33
Pressure balance valve
Press control valve inside the refrigerant adjustment tank.
34
Drain valve for cooling
Drainage control valve for cooling of refrigerant adjustment tank.
35
Filter
Prevents impurities from entering components and parts.
36
Capillary tube
Supports flow regulating and pressure reduction.

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
10
37
One-way valve
Avoid impurities getting into the electric parts. Meanwhile, absorb the water inside
the liquid status to prevent ice blockage.
38
Liquid valve
Stop valve, closed when the unit is delivered from the factory and will be opened
after installation.
39
Low pressure gas pipe valve
Stop valve, closed when the unit is delivered from the factory and will be opened
after installation.
40
High pressure gas pipe valve
Stop valve, closed when the unit is delivered from the factory and will be opened
after installation.
41
Low-pressure measurement
valve
Detects the low pressure value or charges refrigerant during system running.
42
Gas-bypass valve
Make sure pressure of the system is balanced.
43
Pressure-balanced valve
Ensures success startup of compressor.
44
Varying capacity valve 1
To make the compressor turn with double cylinders.
45
Varying capacity valve 2
To make the compressor turn with triple cylinders.
46
Oil-balanced valve 1
Make sure oil of the system is balanced.
47
Oil-balanced valve 2
Make sure oil of the modules is balanced.
48
Oil return valve
Oil return control for the compressor.
49
One-way valve
Prevents high-pressure gas from entering the compressor and fast balances the
suction pressure and discharge pressure in a compressor.
50
Four-way valve 2
Used for the switching between the cooling and heating functions of system IDU.
51
One-way valve
Controls refrigerant flow direction.
2.2 Piping Design of C&H Mode Exchanger
2.2.1 Piping diagram
NCHS1B(U):

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
11
NCHS2B(U):
The piping diagram of NCHS4B(U) and NCHS8B(U) is similar to the piping diagram of NCHS2B(U),
which have 4 or 8 branches of liquid pipes and gas pipes connecting with IDUs.
2.2.2 Names and main functions of components
No.
Name
Main Function
1
Sub cooler
Controls the degree of sub cooling of tube.
(For example, 1a is the sub cooler of IDU1)
2
Filter
Prevents impurities from entering components and parts.
3
Sub cooler electronic
expansion valve
Controls the degree of sub cooling of tube refrigerant.
4
Gas inlet temperature
sensor of sub cooler
Detects gas tube temperature before inflowing to sub cooler.
5
Gas outlet temperature
sensor of sub cooler
Detects outflow gas temperature of sub cooler.
6
Gas-bypass valve
Make sure pressure of the system is balanced.
7
Capillary tube
Supports flow regulating and pressure reduction.
8
High pressure gas valve
Controls the refrigerant flow when IDU is heating.
(For example, 8a is the high pressure gas valve of IDU1)
9
Gas-bypass valve
Make sure pressure of the system is balanced.
(For example, 9a is the gas-bypass valve of IDU1)
10
Low pressure gas valve
Controls the refrigerant flow when IDU is cooling.
A
High pressure gas pipe
Connects with ODU high pressure gas pipe.
B
Low pressure gas pipe
Connects with ODU low pressure gas pipe.
C
Liquid pipe
Connects with ODU liquid pipe.
D
Gas pipe(with IDU)
Connects with IDU gas pipe.
(For example, D1 means connecting with gas pipe of IDU1)
E
Liquid pipe(with IDU)
Connects with IDU liquid pipe.
(For example, E1 means connecting with liquid pipe of IDU1)

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
12
3 BASIC PARAMETERS OF UNIT
3.1 Basic Parameters of ODU
Outdoor Units_Heat Recovery
Ton
6
8
16
Model
-
GMV-VQ72W/A-F(U)
GMV-VQ96W/A-F(U)
GMV-VQ192WM/A-F(U)
Module Combination
-
GMV-VQ72W/A-F(U)
GMV-VQ96W/A-F(U)
GMV-VQ96W/A-F(U)+
GMV-VQ96W/A-F(U)
Performance
Nominal Cooling
Capacity
KBtu/h
72
96
192
kW
21.1
28.1
56.3
Rated Cooling
Capacity①
KBtu/h
69
92
184
kW
20.2
27.0
53.9
Nominal Heating
Capacity
KBtu/h
81
108
216
kW
23.7
31.6
63.3
Rated Heating
Capacity
KBtu/h
77
103
200
kW
22.6
30.2
58.6
Cooling Power Input
kW
6.10
8.36
17.36
Heating Power Input
kW
6.64
8.88
18.03
Sound Pressure Level
dB(A)
60
60
62
Power Supply
-
208/230V 3~ 60HZ
Compressor
Type
-
Inverter Rotary
Inverter Rotary
Inverter Rotary
Number
N
2
2
2+2
Motor Output②
kW
5.83×2
5.83×2
5.83×2+5.83×2
Starting Method
-
Inverter
Inverter
Inverter
Operating Range
-
10%~100%
10%~100%
-
Refrigeration Oil
Brand
-
FV50S
FV50S
FV50S
Oil
Charge
Compressor
L
1.35×2
1.35×2
1.35×2+1.35×2
Oil
Separate
Tank
L
6
6
6+6
Total
L
8.7
8.7
8.7+8.7
Fan
Type×Quantity
-
Propeller×2
Propeller×2
Propeller×(2+2)
Motor Output
W
750+750
750+750
750×2+750×2
Starting Method
-
Inverter
Inverter
Inverter
Air Flow Rate
m3/h
14000
14000
14000+14000
cfm
8240
8240
8240+8240
Max. External Static
Pressure
Pa
82
82
82
in.W.G
0.328
0.328
0.328
Ambient
Temperature Range
Cooling
℃
-10~52
-10~52
-10~52
℉
14~125.6
14~125.6
14~125.6
Heating
℃
-30~24
-30~24
-30~24
℉
-22~75.2
-22~75.2
-22~75.2

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
13
Outdoor Units_Heat Recovery
Ton
6
8
16
Model
-
GMV-VQ72W/A-F(U)
GMV-VQ96W/A-F(U)
GMV-VQ192WM/A-F(U)
Module Combination
-
GMV-VQ72W/A-F(U)
GMV-VQ96W/A-F(U)
GMV-VQ96W/A-F(U)+
GMV-VQ96W/A-F(U)
Refrigerant
Type
-
R410A
R410A
R410A
Charge Volume
kg
12.5
12.5
12.5+12.5
lbs.
27.6
27.6
27.6
Control
-
EXV
EXV
EXV
Pipe Connection
Low Pressure Gas
Pipe
mm
28.6
28.6
31.8
in.
1-1/8
1-1/8
1-1/4
High Pressure Gas
Pipe
mm
19.05
19.05
28.6
in.
3/4
3/4
1-1/8
Liquid Pipe Size
mm
12.7
12.7
15.9
in.
1/2
1/2
5/8
Dimensions
(width×depth×height)
External Dimension
mm
1340×765×1605
1340×765×1605
1340×765×1605+
1340×765×1605
in.
52-3/4×30-1/8×63-1/5
52-3/4×30-1/8×63-1/5
52-3/4×30-1/8×63-1/5+
52-3/4×30-1/8×63-1/5
Packaging Dimension
mm
1420×840×1775
1420×840×1775
1420×840×1775+
1420×840×1775
in.
56×33×69-7/8
56×33×69-7/8
56×33×69-7/8+
56×33×69-7/8
Weight
Net Weight
kg
408
408
408+408
lbs.
899
899
899+899
Gross Weight
kg
423
423
423+423
lbs.
933
933
933+933
Maximum Quantity of Connected Indoor Unit
unit
12
17
34
Protection Devices
High Pressure
Protection
-
High pressure sensor, high pressure switch
Compressor/Fan
-
Over-current protection, over-heat protection
Inverter
-
Over-current protection
Remark
1. Rating conditions:
Cooling: Indoor 26.7℃(80.1℉)DB/19.4℃(66.9℉)WB, Outdoor 35℃(95℉)DB/23.9℃(75℉)WB
Heating: Indoor 21.1℃(70℉)DB/15℃(59℉)WB, Outdoor 8.3℃(46.9℉)DB/6.1℃(43℉)WB
2. It refers to the operation power of compressor under ARI test conditions (condensing temp.130℉,
evaporating temp.45℉, return gas temp.65℉, liquid temp.115℉) at 60HZ.
3. Oil charge includes the total oil amount of outdoor units, residual oil amount of compressor and oil
separate tank. When replacing the compressor or oil separate tank, only the corresponding required oil
amount shall be charged.

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
14
3.2 C&H Mode Exchanger
C&H Mode Exchanger is used for connecting outdoor unit and indoor unit, and providing high
pressure, low pressure and medium pressure refrigerant provided by outdoor unit for cooling or heating
mode and complete the refrigerant system circulation for the purpose of adjusting indoor temperature.
(1) C&H Mode Exchanger provides multiple branch combination forms, which can connect different
kinds of lower branches. Each branch of the C&H Mode Exchanger can connect 8 indoor units at the
most and the total capacity should be no more than 14kw.
  
convenient for installation, leakage detection and maintenance.
(3) C&H Mode Exchanger is supplied power independently, which connects indoor unit and outdoor unit

One-to-one Mode Exchanger NCHS1B(U)
One-to-two Mode Exchanger NCHS2B(U)
One-to-four Mode Exchanger NCHS4B(U)
One-to-eight Mode Exchanger NCHS8B(U)

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
15
Model
NCHS1B(U)
NCHS2B(U)
NCHS4B(U)
NCHS8B(U)
Max. IDU Branches
/
1
2
4
8
No. of connectable IDU of each
branch
/
8
8
8
8
Total Connectable IDU
/
8
16
32
64
Max. Capacity of each branch
kW
14
14
14
14
KBtu/h
48.0
48.0
48.0
48.0
Max. Capacity of connectable IDU
kW
14
28
45
68
KBtu/h
48.0
96.0
153
232
Power supply
V/Ph/Hz
208/230V 1Ph 60Hz
Power consumption
W
8
20
32
80
Outdoor Unit Piping
Connection
Liquid
mm
9.52
9.52
12.7
15.9
In.
3/8
3/8
1/2
5/8
Gas(Low
pressure)
mm
22.2
22.2
28.6
28.6
In.
7/8
7/8
1 1/8
1 1/8
Gas(High
pressure)
mm
15.9
19.05
19.05
22.2
In.
5/8
3/4
3/4
7/8
Indoor Unit Piping
Connection
Liquid
mm
9.52
9.52
9.52
9.52
In.
3/8
3/8
3/8
3/8
Gas
mm
15.9
15.9
15.9
15.9
In.
5/8
5/8
5/8
5/8
3.3 Combination Mode
Single Model
GMV-VQ192WM/A-F(U)
Combined Model
GMV-VQ96W/A-F(U)+GMV-VQ96W/A-F(U)
No matter how many outdoor units there are,the total rated capacity of indoor units must not exceed
135% of the total rated capacity of outdoor units. Stable and safe operation can only be guaranteed in a
range of 50%~135%.
4 ELECTRICAL PARAMETERS
4.1 Power Cable Wire Gauge and Circuit Breaker Selection of ODU
Outdoor units
Power Supply
Fuse Capacity
MCA
MOP
V/ Ph /Hz
A
A
A
GMV-VQ72W/A-F(U)
208V/230V 3~ 60Hz
50
40
50
GMV-VQ96W/A-F(U)
208V/230V 3~ 60Hz
60
45
60

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
16
GMV-VQ192WM/A-F(U)
208V/230V 3~ 60Hz
60+60
45+45
60+60
Note: MCA: Minimum Circuit Ampacity; MOP: Maximum Overcurrent Protection.
Power cable wire gauge and circuit breaker must be selected based on the above parameters and in
compliance with local safety requirements. If there is conflict between above parameters and national
requirements, please contact the manufacture promptly.
If power cable wire gauge and circuit breaker is out of the above design range, fire hazard may occur.
4.2 Circuit Diagram of ODU
The actual wiring should always refer to the wiring diagram of the unit.