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The 230 - 430 kW models are shipped from the factory complete ready for installation and use.
The unit is pressure-tested, evacuated, and fully charged with R134a and has an initial oil
charge. R134a has no ozone depletion potential. It is environmentally safe and does not have a
phase-out date. After assembly, a complete operation test is performed with water flowing
through the cooler to assure that the refrigerating circuit operates correctly.The units can be installed on the rooftop, ground outside and so on, instead of being equipped
in a special machine room. It can be widely applied in newbuilt or reconstructed industry and
civil-building project, such as hotel, apartment,restaur-ant, office building, shopping mall,
theater, gymnasium, hospital and so on, as well as supplies required cooling water for factories
in technical process of producing, so it's especially suitable for some special locations around
where there are high-level requirements for noise and environments and cooling tower are
difficult to install.
LS BLG F 230 M T3 /Nb-M
Nominal Capacity
Ton
65
100
122
Model
Refrigerant
R134a
Model Name
LSBLGF230MT3/Nb-M
LSBLGF350MT3/Nb-M
LSBLGF430MT3/Nb-M
Power Supply
Ph, V, Hz
3,380,50
3,380,50
3,380,50
LS
BLG Screw compressor
F
230
T3
M
M
Water chiller
Air cooled
Nominal Cooling Capacity
Modular
Voltage
230=230kW= 784 kBtu/h350=350kW= 1194 kBtu/h430=430kW= 1467 kBtu/h
M 380V-3Ph-50Hz
Super high ambient operation 52 /125
Model Signification Options
Nb Refrigerant Nb-R134a
3.1 Description
1
1.MODELS LIST 2
2.NOMENCLATURE 3
3.FEATURES 3
4.PRODUCT DATA 6
5.PERFORMANCE CORRECTION 8
6.ANTIFREEZE 9
7.INSTALLATION 9
8.ELECTRICAL DATA 11
10.SCHEMATIC WIRING DIAGRAM 15
12.MICROPROCESSOR CONTROLLER 19
2 GREE Central Air Conditioners 3GREE Central Air Conditioners
2
Utilizing new screw compressor technology, the chillers meet or exceed the performance
requirements of ASHRAE 90.1. All system components are selected for optimum performance,
including the condenser coil areas and evaporator sizes.
3.2 Standard Specifications
High Efficiency Full Load Operation
CONTENTS
MODELS LIST
NOMENCLATURE
FEATURES
11.WIRE CONTROLLER 16
9.ELECTRICAL DIAGRAM 12
Air-Cooled Screw Chiller Technical Sales Guide
13.LONG-DISTANCE MONITORING SYSTEM 20
14.CENTRAL AC BMS INTERFACE 23
15.APPLICATION DATA 28
By using compressor on each chiller, unloading characteristics and part load performance are
outstanding. Integrated part load value (IPLV) is a part load performance indicator as outlined
in Standard ARI 550/590-1998. The IPLV rating compares the performance of different chillers
under identical conditions. When the IPLV is listed as EER (Energy Efficiency Ratio), a higher EER
will indicate that the chiller's overall performance is better.
The chillers have a reputation for a compact design and small footprint. A small footprint can
save installation costs by minimizing the size of the concrete mounting pad or reduces the am-
ount of structural steel if the unit is mounted on the rooftop.
The chillers are designed with quiet screw compressors. Fans are selected for good performan-
ce and lower sound levels. The attention to detail with sound is critical in the design. Small issu-
es such as refrigerant piping, supports for piping, securing components to the structure are all
important to making a quiet product. We proudly publish our sound performance.
GREE has provided the latest technology in controlling the chillers. The new controller provides
a user friendly environment for the operator. The control logic is designed to provide maxi-
mum efficiency, to help provide continuing operation in unusual operating conditions through
proactive controls, and to provide a history of conditions to aid in problem resolutions. Perhaps
the greatest benefit is Protocol for integrating with your building automation system (BAS). The
interface with the BAS standard protocols through Modbus.
The evaporator is direct expansion, shell-and-tube type with water flowing in the baffled shell
side and refrigerant flowing through the tubes. The evaporator has a carbon steel fin and
seamless high efficiency copper tubes roller expanded into a carbon steel tube sheet.
Refrigerant heads are carbon steel with multi-pass baffles to provide oil return and are
removable to permit access to the tubes from either end. For water removal, 10mm vent and
drain plugs are provided on the top and bottom of the shell. An ambient air thermostat
controls the heater cable. The fitted and glued in place insulation has a K factor of 0.28. The
refrigerant side maximum operating pressure is 2068 kPa. The water side operating pressure is
1048 kPa. Each evaporator is designed, constructed, inspected, and stamped according to the
requirements of the ASME Boiler and Pressure Vessel Code.
Fans-The condenser fans are composed of corrosion resistant aluminum hub and glass-fiber-
reinforced polypropylene composite blades molded into a low noise airfoil section. They are
designed for maximum efficiency and are statically and dynamically balanced for vibration-free
operation. They are directly driven by independent motors, and positioned for vertical air
discharge. The fan guards are constructed of heavy-gauge, rust-resistant, coated steel. All
blades are statically and dynamically balanced for vibration-free operation. Motors-The fan motors are totally enclosed air-over, squirrel-cage type, current protected. They
feature ball bearings that are double-sealed and permanently lubricated.
Quiet Operation
Superior Controls
Compact Design with Small Footprint
Evaporator
The chiller's Unit Control Module is an innovative, modular microprocessor control design. It
coordinates the actions of the chiller in an efficient manner and provides stand-alone operation
of the unit. A Human Interface Panel is a standard component of the Chiller. Access to all unit
controls is via the Human Interface Panel.
Microprocessor Controller
Suction gas cooled semi-hermetic compact twin screw compressors with high efficiency profile.
Compressors are provided with high efficiency suction strainer, oil trainer crank case heater
and built in safety pressure relief valve. Compressors are also provided with intelligent electro-
nics including motor temperature monitoring, phase sequence monitoring, manual reset lock-
out and discharge temperature protection by PTC`s sensors. Optimized oil management ensu-
re minimum refrigerant dilution in oil.
Compressor
GREE Central Air Conditioners 5GREE Central Air Conditioners
Excellent Part Load Performance
A water flow switch is available for field installation in the chilled water piping to protect
against evaporator freeze-up under low, or no flow conditions. Terminals are provided in the
unit control center for field connection of the water flow detection switch. A flow detection
device of some type is required.
Provides a digital output to control a second chilled water pump. Standard unit has one pump
output.
High Ambient Operation
This option is required for operation at ambient temperatures above 46 , up to 52 or
when the unit is equipped with the low ambient fan control option. The option can be ordered
with any unit. Compressor loading and unloading is adaptively determined by system load,
ambient air temperature and other inputs to the control algorithms.
Water Flow Switch
Pump Output Signal
Condenser
Condenser coils have internally enhanced seamless copper tubes arranged in a
staggered row pattern. The coils are mechanically expanded into louver aluminum fins
with full fin collars. A variety of optional coil material and coatings are available for
corrosive atmospheres. The external condenser coils are fitted with a protective wire
mesh guard. Several optional coil materials are available for corrosive atmospheres.
4
Air-Cooled Screw Chiller Technical Sales Guide
The "W" shaped coil provides excellent headroom under the unit for inspection and service. It
allows less installation space requirement. Heavy structure unit with waterproof, electro-static,
polyester powder painted.
Construction
4.1 Ratings
The patented design of that any unitary module can be as master module, makes various
emergencies easy. Each unitary module can be combined with another module with different
capacity so that different units with different cooling capacity are formed in a wider application
range. Balanced running of compressor extends the lifetime of unit. The compressor of each
unitary module will be started one after another to ensure less attack to power network. The
design of combination of modular makes the unit compact in size and configuration,
convenient in delivery and installation.
Unit on-off switch: ON-OFF switch is provided for manually switching the unit control circuit.Indicator lights: LED lights indicate power on to unit, running state and fault indications due to
safety devices.Filter drier: Refrigerant circuits are kept free of moisture, sludge, acid and oil contamination by
filter.Under voltage and phase protection: Protects against low incoming voltage as well as single
phasing, phase reversal.Sight glass: An easy-to-read color indicator shows moisture contents and provides a mean for
checking the system refrigerant charge.Liquid line solenoid valve: Closes when the compressor is off to prevent any liquid refrigerant
from accumulating in the evaporator.
3.3 Standard Accessories
3.4 Standard Control & Safety Devices
Safety valve: Protects the unit against high discharge pressure.Compressor In-built protection device: Motor winding temperature, discharge gas temperature
and phase reversal for direction of rotation.Crankcase heaters: Protects the unit against refrigerant migration, oil dilution and potential
compressor failure.
4
Model
LSBLGF230MT3/Nb-M
LSBLGF350MT3/Nb-M
LSBLGF430MT3/Nb-M
Capacity
kW / kBtu/h
230 / 784
350 / 1194
430 / 1467
EER
9.56
9.56
9.56
EER=Energy Efficiency Ratio at full load-the cooling capacity in Btu per hour(Btu/h) divided by the power input in watts, expressed in Btu/h per watt((Btu/h)/watt).
PRODUCT DATA
6 GREE Central Air Conditioners 7GREE Central Air Conditioners
4.3 Physical Data
4.2 Unit Application Data
Voltage VariationMin./Max.
380V-3Ph-50Hz 342/420
Ambient Air on Condenser coilMin./Max. ( ) 18/52 ( 65/125)
ModelsLSBLGFMT3 /Nb-M
230 350 430
230 350 430
784 1194 1467
65 100 122
80 125 152
Nominal Cooling Capacity
Input Power
kW
KkBtu/h
TR
kW
Power Supply 380V-3Ph-50Hz
Running Control Microcomputer auto control, running status display, abnormal status alarm
Safety Apparatus
High/low pressure protection, discharge temp.
protection ,motor overload protection, anti-freeze ,
water flow protection , low water flow protection ,
phase-sequence protection, compressor overload
protection, compressor inset protection ,pressure
differential protection
Compressor Type Semi-Hermitic Screw Compressor
R134a
Refrigerant Charge
Heat Exchanger Shell and Tube Evaporator
Coole
r
Water Flow
Loss of Pressure
Max. Pressure
Water In/Out Pipe Diameter
kg
M3
m /h
kPa
MPa
mm
1.0
100 125 150
40 60 74
50 50 50
DN 100 DN 100 DN 125
GPM 176 264 326
Conde
-nse
r
Heat Exchanger Finned Coil Type Condenser
Fan Motor Power Input
kW 2X4 2X6 2X8
Dim
en
-sio
n Height
Width
Depth
mm
mm
mm
3000
2100
2300
4000
2100
2300
5000
2100
2300
Shipping Weights
Operation Weights
kg
kg
2880
3080
3880
4180
4500
4880
Refrigerant Type
Air-Cooled Screw Chiller Technical Sales Guide
NOTE: 1 mm=0.0394 in
Height
Width
Depth
mm
mm
mm
3230
2180
2300
4410
2180
2300
5330
2180
2300
Outline
Package
-33.3(-29)
-26.7(-16)
0.973
1.182
1.30
PERFORMANCE CORRECTION5
Chilled Water Temperature LSBLGF350MT3/Nb-M
6 8 10 12 14
Am
bie
nt Tem
pera
ture
Co
oli
ng C
ap
acit
y k
W
Chilled Water Temperature LSBLGF230MT3/Nb-M
6 8 10 12 14
25
30
35
40
45
50
55
360
330
300
270
240
210
180
150
Am
bie
nt Tem
pera
ture
Co
oli
ng C
ap
acit
y k
W
Chilled Water Temperature LSBLGF430MT3/Nb-M
6 8 10 12 14
600
570
540
510
480
450
420
390
360
330
300
Am
bie
nt Tem
pera
ture
Co
oli
ng C
ap
acit
y k
W
The units can operate with a leaving chilled fluid temperature from of 42 to 60 (5 to 16 ).
A glycol solution is required when leaving chilled fluid temperature is below 4.5 .The use of
glycol will reduce the performance of the unit depending on concentration.
Ethylene Glycol Factors
% by Weight
Freezing Point
Ambient Temperature
Cooling Capacity Correction Factor
Water flow Correction Factor
Pressure Drop Correction Factor
10
-3.3(26)
8.3(47)
0.998
1.036
1.07
20
-7.8(18)
-1.7(29)
0.993
1.060
1.10
30
-13.9(7)
-6.7(20)
0.987
1.092
1.18
40
-21.7(-7)
-16.7(2)
0.980
1.132
1.24
50
NOTE: Ethylene and propylene glycol ratings are outside the scope of ARI Standard
550/590-98 certification program.
7
7.1 Dimensions
E
Water Outlet Water Inlet
DA
F
C
B
Model
LSBLGF230MT3/Nb-M
LSBLGF350MT3/Nb-M
LSBLGF430MT3/Nb-M
A
3000
4000
5000
B
2100
2100
2100
C
2300
2300
2300
D
1480
2100
2700
E
850
850
850
F
575
575
575
6 ANTIFREEZE
INSTALLATION
8 GREE Central Air Conditioners 9GREE Central Air Conditioners
Performance Correction
Leaving Chilled
Water ( )
Ambient Temperature ( )
25(77)
1.07
1.10
1.14
1.17
1.20
1.23
1.27
1.31
1.34
1.37
1.41
30(86)
1.00
1.03
1.07
1.10
1.13
1.16
1.19
1.23
1.26
1.29
1.32
35(95)
0.94
0.97
1.00
1.03
1.06
1.09
1.12
1.15
1.17
1.20
1.23
40(104)
0.84
0.87
0.91
0.94
0.98
1.01
1.04
1.07
1.09
1.12
1.14
45(113)
0.81
0.83
0.86
0.88
0.91
0.93
0.96
0.99
1.01
1.03
1.06
50(122)
0.78
0.79
0.82
0.83
0.85
0.87
0.89
0.91
0.93
0.95
0.98
55(131)
0.74
0.75
0.77
0.78
0.79
0.81
0.82
0.83
0.85
0.87
0.89
510
480
450
420
390
360
330
300
270
240
25
30
35
40
45
50
55
25
30
35
40
45
50
55
Air-Cooled Screw Chiller Technical Sales Guide
5(41)
6(42.8)
7(44.6)
8(46.4)
9(48.2)
10(50)
11(51.8)
12(53.6)
13(55.4)
14(57.2)
15(59)
7.2 Rigging Instruction
The center of gravity is not along unit center line. Ensure that the center of gravity aligns with
the main lifting point before lifting. Use spreader bar when rigging, to prevent the slings during
the unit.
All panels should be in place when rigging.Care must be taken to avoid damage to the coils during handling.Insert packing material between coils and slings as necessary.
PROPER INTERSPACE
TO BE PROVIDED
LIFT LIFT
Spreader Bar
7.3 Mounting Location
150A A
2000
R1
R6 R5 R4
R2 R3LSBLGF230MT3/Nb-M
LSBLGF350MT3/Nb-M
LSBLGF430MT3/Nb-M
A
1175
1675
2175
Model
7.4 Load Distribution
7.5 Installation Interspace
Model
LSBLGF230MT3/Nb-M
LSBLGF350MT3/Nb-M
LSBLGF430T3M/Nb-H
R 1 R 2 R 3 R 4 R 5 R 6
2 8 0 1 1 2 0 2 0 0 2 0 0 8 0 0 2 8 0
3 9 0 1 5 9 0 2 9 5 2 9 5 9 2 0 3 9 0
5 3 0 1 5 9 0 4 3 5 4 3 5 9 8 0 5 3 0
1000
1800
3000
1800
1800
1800
18001800
11GREE Central Air Conditioners
Attention to Riggers
Caution
10 GREE Central Air Conditioners
Air-Cooled Screw Chiller Technical Sales Guide
Model
LSBLGF230MT3/Nb-M
LSBLGF350MT3/Nb-M
LSBLGF430MT3/Nb-M
Area of Electrical Wire2
150mm2
185mm2
240mm
8 ELECTRICAL DATA
9 ELECTRICAL DIAGRAM
13GREE Central Air Conditioners12 GREE Central Air Conditioners
Air-Cooled Screw Chiller Technical Sales Guide
LSBLGF230MT3/Nb-M LSBLGF350MT3/Nb-M
15GREE Central Air Conditioners14 GREE Central Air Conditioners
Air-Cooled Screw Chiller Technical Sales Guide
LSBLGF430MT3/Nb-M 10
ELECTRIC BOX
MAIN POWER
ENTRANCE
FIELD CONTROL WIRING ENTRANCE
TYPICAL CONTROL BOX LOCATIONS AND FIELD WIRING
SCHEMATIC WIRING DIAGRAM
FIELD CONTROL WIRING CONNECTION MAIN POWER WIRING CONNECTION
LEGEND
16 GREE Central Air Conditioners 17GREE Central Air Conditioners
Air-Cooled Screw Chiller Technical Sales Guide
COMMUNICATION WIRING CONNECTION AND SETTING
11 WIRE CONTROLLER
3 2 1 4 5
6
7
8 910
NO. Name Function description
The light is on when power connection is available, or else it is off.
The light is on when unit is under operation, or else it is off
the light is on when unit has any malfunction
It is used to turn on or off the unit. Press the button for 3 seconds when unit is off to turn on unit, press it for 3 seconds when unit is on to turn off the unit. The button can't be press continuously
Press it for 3 second, the system can clear previous errors and run self-detected automatically again. This button cannot be pressed continuously
Power
Run
Error
On/Off
Reset
1
2
3
4
5
NO. Name Function description
In menu selection, press this button to move cursor to up or left one item; When setting parameter, press this button to increase the value. This button canbe pressed continuously
In menu selection, press this button to move cursor to down or right one item; when setting parameter, press this button to decrease the value. This button can be pressed continuously
6
7
9
Press it to back to previous menu. This button can be pressed continuously
In menu selection, press it to select item and enter below menu; When setting parameter, press it to save adjustment and move cursor. This button can be pressed continuously
the area for displaying information
8
10
Exit
Enter
LCD
Operation View
Menu structure of controller
Heat pump type
Main
Contr
ol M
enu
Main
Menu
Para
mte
r Settin
gM
odule
Vie
wU
ser
settin
gVersion
Module 1 Module 2 Module 3 Module 4 Module 5 Module 6 Module 7 Module 8
Force Defrost
Defrost Intl Defrost Dur Adj. C Rate St C Rate
Module 1
User Par.. Setting
Sys
Par. E
ttin
g
Module 2
Module 3
Module 4
Module 5
Module 6
Module 7
Module 8
Ente
r Pa
ssw
ord
Password Change
Startup Mode Sound Backlight
Auto Antifre. Auxiliary Heat Clock Setting Timer Setting
Water-out T Water-in T Defrost T Ambient T Antifre T. Discha-rge T.
Tempe-rature View
Pressure View High Pressure Low Pressure Oil Pressure
Compressor Fan 1 Fan 2 Fan 3 4-way valve
Auxi-heat 1 Auxi-heat 2 Sys StateSta
te V
iew
Error View Previous Error Present Error
C Water-in T. H Water-in T
Adopt default Par.
Settin
g P
ar. b
y m
anual
Startup Intl Adj. Intl Oil P Dif Sys P Dif
Antifre. Anti-ovh Auxi-heat On Auxi-heat Off .
Defrost On Defrost Off
Debugging
Cooling only type
Main
Contr
ol M
enu
Main
Menu
Para
mte
r Settin
gM
odule
Vie
wU
ser
settin
g
Version
Adj. C Rate St C Rate
User Par.. Setting
Sys
Par. E
ttin
g
Ente
r Pa
ssw
ord
Password Change
Startup Sound Backlight
Clock Setting Timer Setting
Water-out T Water-in T Antifre T. Discha-rge T.
Tempe-rature View
Pressure View High Pressure Low Pressure Oil Pressure
Compressor Fan 1 Fan 2
Sys StateSta
te V
iew
Error View Previous Error Present Error
C Water-in T.
Adopt default Par.
Settin
g P
ar. b
y m
anual
Startup Intl Adj. Intl Oil P Dif
Antifre.
Fan 3
Sys P Dif
Module 1
Module 2
Module 3
Module 4
Module 5
Module 6
Module 7
Module 8
AccessoriesS=Standard O=Optional F=Field supplied
Model
1
2
3
4
5
6
7
8
9
10
11
12
Cooling only Heat pump Accessories Name
Module unit
Four-core control connection cord (8 meters)
Display board
Water flow switch and water flow switch control board
Electric control box
Auxiliary electric heater
Water tank
Pressure gauge
Thermometer
Flexible joint
Control connection cord
Power connection wire
S
S
S
S
O
F
O
O
O
O
O
O
S
S
S
S
O
O
O
O
O
O
O
12
The microprocessor controls overall unit operation and controls a number of processes simulta-
neously. These processes include internal timers, reading inputs, analog to digital conversions,
fan control, display control, diagnostic control, output relay control, demand limit, capacity con-
trol, head pressure control, and temperature reset. Some processes are updated almost contin-
uously, others every 2 to 3 seconds, and some every 30 seconds. The microprocessor routine is
started by switching the Emergency ON-OFF switch to ON position. Pump control of .External pumps (where configured) will energize the cooler pump to the input occupied signal
from external system. When the unit receives a call for cooling, the unit stages up in capacity to
maintain the cooler fluid set point. The first unit starts 1 to 3 minutes after the call for cooling.The microprocessor controls the capacity of the chiller and the loading capacity to satisfy actual
dynamic load conditions. The control maintains leaving-fluid temperature set point shown on
the panel interface through intelligent positioning of the slide valve and compressor cycling.
MICROPROCESSOR CONTROLLER
Microprocessor Control
Accuracy depends on loop volume, loop flow rate, load, and outdoor-air temperature. No ad-
justment for cooling range or cooler flow rate is required, because the control automatically
compensates for cooling range by measuring both return-fluid temperature and leaving-fluid
temperature. This is referred to as leaving-fluid temperature control with return-fluid tempera-
ture compensation. The basic logic for determining when to add or remove capacity is a time
band integration of deviation from set point plus rate of change of leaving-fluid temperature.
Start-up After control circuit switches on, the pre-start process takes place, then microprocessor
checks itself, starts pump and waits for temperature to stabilize. The controlled pull down featu-
re limits compressor loading on start-up to reduce demand on start-up and unnecessary com-
pressor usage.Capacity control On the first call for cooling, the microprocessor starts compressor and fan
stage on lead unit. As additional cooling is required, the capacity of the compressor is
increased by changing the position of the slide valve. As the load increases above the
compressor's capacity, another unit's compressor is started and both staged together. The speed
at which capacity is added or reduced is controlled by temperature deviation from set point
and rate of temperature change of chilled fluid.
Control Sequence
The Main Base Board (MBB) responds to the supply chilled water temperature to cycle the
compressors to match cooling load requirements. The Minimum Load control valve is
energized by the MBB. The valve allows hot gas to pass directly into the cooler circuit on the
initial step of unloading, permitting the unit to operate at lower loads with less compressor
cycling.
Thermistors are used to control temperature-sensing inputs to the microprocessor. No
additional thermistor sensors are required for optional leaving chilled water temperature,
return water, or outdoor air . Two refrigerant pressure transducers are used for sensing suction and discharge pressure. The
microprocessor uses these inputs to control capacity and fan cycling.
Sensors
18 GREE Central Air Conditioners 19GREE Central Air Conditioners
Air-Cooled Screw Chiller Technical Sales Guide
20 GREE Central Air Conditioners 21GREE Central Air Conditioners
Air-Cooled Screw Chiller Technical Sales Guide
13
13.1 Introduction to Long-distance Monitoring System
As the development and improvement of manufacturing technology and in order to solve the
problems of complex distribution of the central AC in the buildings and difficult control and
maintenance of them, an platform easy and reliable to operate must be provided to the users
for daily management and maintenance. So this long-distance monitoring system combining
electronic communication and computer technologies is developed to collect the running state of
the units and to monitor and control the units from a long distance.
LONG-DISTANCE MONITORING SYSTEM
3.the communication cable and heavy-current wire should be separated and the distance
between them can not be below 15cm.4.line A and line B of Bus 485 should respectively correspond with line A and line B.5.crystal head(crystal head buckle is downwards). £ ©
13.2 Installation and Selection.
1.The address code of the communication modules should not be conflicted in one project.2.Optoelectronic Isolated Repeater: every 800m of communication distance equipped needs
one and every 30 communication modules equipped needs one.
Notice
4-core crystal phone plug
485 A line
485 B line
Crystal phone plug
Scope of Supply
S=Standard parts; O= User Optional; F= Field supplied
Scope of Supply Type Selection
PC F Please check 7.Installation Criteria
Remarks
Including communication module ZJ522, power
transformer and connecting wire
Including CD and optoelectronic isolated converter
Rs232- Rs485
One every 800m of communication distance
equipped with one and One every 30
communication modules equipped with one.
Optoelectronic isolated repeater
Rs485
4-core twisted pair wire
3-way phone connector
S
S
O
F
F
Confirmation of Quantity of Parts
Types
All type
Qty of Communication
Modules
Long-distance Monitoring
System
Optoelectronic Isolated
Repeater
One unit equipped with a
communication module
ZJ522
1 Air cooled screw (heat
pump) chiller Long-distance
Monitoring System set
FE30-22A(M
Communication module set
FE30-22/E
Air cooled screw (heat pump)
chiller Long-distance Monitoring
System set FE30-22A(M)
One every 800m of
communication distance
equipped with one.
One every 30
communication modules
equipped with one
22 GREE Central Air Conditioners 23GREE Central Air Conditioners
Air-Cooled Screw Chiller Technical Sales Guide
Wiring Diagram
Project Requirements Quantity
Qty set 3(LSBLGRF250M)
Communication module setFE30-22/E
Repeater
3
1
Description of above communication cables
Cable Description
Crystal head and the other end is XH 4-core pin connector 2-core Type-V twisted pair wire
both crystal head(Standard parts)
crystal head and the other end connects of it connects with wiring terminal of converter.
(2-core Type-V twisted pair wire
both 9-core head (Standard parts)
D1
D2
D3
H2
...
...D1
D2
...
... ...
Displayer n
...
...D1
COM1COM1
COM2
Unit Module1
...
...
Network 1
...
...
Network n
...
ZJ5221
D2
R-/D---Rs485B
onitoring Center
Unit Module8 Unit Module1 Unit Module8
COM2 D1
D2 D2 COM2D1
ZJ5222 ZJ522n
D2
Unit Module1 Unit Module8 Unit Module1 Unit Module8
...
Displayer 1
Displayer 254Displayer m
ZJ522m ZJ522 254ZJ522m+1
COM2D2 D1 D2 D2 D1
R+/D+---Rs485A
D3
RS232-485
Converter
H2
PC
3 sets of units LSBLGRF250M, 4 communication modules are needed, the communication distance is
above 800m, then one repeater is necessary, and the quantity of communication modules is below 30 the
repeater is unnecessary, as follow:
Air cooled screw (heat pump) chiller Long-distance
Monitoring System set FE30-22A(M)1
14 CENTRAL AC BMS INTERFACE
BMS interface of Gree Central AC is only for Gree central AC devices. There is BMS interface or
multifunctional gateway in the hardware and standard communication protocol and BMS software plug-in
in the software. Gree central AC can be centrally monitored and managed through BMS interface together
with other devices in the building.
14.1. Introduction to BMS interface of Gree Central AC
14.2. Installation and Selection
Notice
1.The air conditioners could be connected with the BMS system with every different model, or
several models together, below wiring diagram shows the connection way of single unit, just for
easy drawing.
(2.3.4.5.6Please check 13.2)
Selection Example
24 GREE Central Air Conditioners 25GREE Central Air Conditioners
Air-Cooled Screw Chiller Technical Sales Guide
Scope of Supply
S=Standard parts; O= User Optional; F= Field supplied
Scope of Supply Type Selection Remarks
optoelectronic isolated converter Rs232- Rs485
4-core twisted pair wire
3-way phone connector
S
O
F
F
Confirmation of Quantity of Parts
Types
All type
Qty of Communication
Modules
Optoelectronic isolated converter
Optoelectronic Isolated
Repeater
One unit equipped with a communication module
ZJ522One if BMS COM is Rs232
One every 800m of communication distance equipped with one.
One every 30 communication modules equipped with one.
Wiring Diagram
Project Requirements Quantity
Qty set 3(LSBLGRF250M)
Communication module setFE30-22/E
Repeater
3
1
BMS COM is RS232,one converter is needed.3 sets of units LSBLGRF250M, 4 communication
modules are needed, the communication distance is above 800m and one repeater is
necessary and the quantity of communication modules is below 30 repeater is unnecessary, as
follow:
Optoelectronic Isolated Converter 1
Description of above communication cables
Cable Description
Crystal head and the other end is XH 4-core pin connector
both crystal head(Standard parts)
crystal head and the other end connects of it connects with wiring terminal of converter.
D1
D2
D3
File of protocol SModbus protocol is used for user to integrate with BMS system.
Communication module FE30-22/E
Including communication module ZJ522, power transformer and connecting wire
Long distance monitoring set FE30-22A(M)
Including CD and optoelectronic isolated converter Rs232- Rs485
O
It is needed when the interface protocol of BMS system is Rs232
Optoelectronic isolated repeater Rs485
O
One every 800m of communication distance equipped with one and One every 30 communication modules equipped with one.
...
...D1
D2
...
... ...
Displayer n
...
...D1
COM1COM2
COM2
Unit Module1
...
...
Network 1
...
...
Network n
...
ZJ5221
D2
R-/D---Rs485B
Unit Module8 Unit Module1 Unit Module8
COM2 D1
D2 D2 COM2D1
ZJ5222 ZJ522n
D2
Unit Module1 Unit Module8 Unit Module1 Unit Module8
...
Displayer 1
Displayer 254Displayer m
ZJ522m ZJ522 254ZJ522m+1
COM2D2 D1 D2 D2 D1
R+/D+---Rs485A
D3
RS232-485
Converter
BMS
Just for Rs232interface of BMS
Selection Example
14
The unit should be mounted on a flat and level foundation, ground or roof, capable of suppor-
ting the entire operating weight of the equipment. Operating weights are given in the
Dimension. For ground level installations, precautions should be taken to protect the unit from being
tampered by or injuring to unauthorized persons. Screws on access panels will prevent casual
tamper-ing; however, further safety precautions, such as unit enclosure options, a fenced-in
enclosure, or locking devices on the panels may be advisable. Check local authorities for safety
regulations.
The chilled liquid piping system should be laid out so that the circulating pump dis-charges into
the cooler. The inlet and outlet cooler liquid connections are given in Dimension
A.Unit shall be delivered to job site fully assembled, and charged with refrigerant and oil by the
manufacturer. B.Unit shall be stored and handled according to the manufacturer'sinstructions.
Unit must be leveled when installed to ensure proper oil return to the compressors.
Foundation
Chilled Liquid Piping
Delivery and Handling
The chillers are designed for outdoor installation. When selecting a site for installation, be
guided by the following conditions:1. For outdoor locations of the unit, select a place having an adequate supply of fresh air for
the condenser.2. Avoid locations beneath windows or between structures where normal operating sounds may
be objectionable.3. Installation sites may be either on a roof, or at ground level.4. The condenser fans are the propeller-type, and are not recommended for use with duct work
in the condenser air stream.5. When it is desirable to surround the unit(s), it is recommended that the screening be able to
pass the required chiller CFM without exceeding 0.1" of water external static pressure. 6.Recommended clearances for units are given in DIMENSIONS. When the available space is
less, the unit(s) must be equipped with the discharge pressure transdu-cer option to permit high
pressure unloading in the event that air recirculation were to occur.
APPLICATION DATA
Leveling Unit
Maximum leaving chilled fluid temperature for unit is 59 (15 ). For continuous operation, it
is recommended that inlet fluid temperature does not exceed 86F(30 ) ( If continuous opera-
tion is required for inlet water temperature above 86 (30 ), please contact GREE factory).Minimum leaving chilled fluid temperature for standard unit is 38 (3.3 ) (For lower leaving
temperature contact GREE factory).
Chiller ratings and performance data pertain to cooling temperature rise of 10 . Chillers
maybe suitable for operation in a range from 5.4 to 14.5 temperature rise without adjustm-
ent, provided flow limits are not exceeded. High flow rate is limited by pressure drop that can be
tolerated ( for any high flow rate value larger than values in performance tables, please contact
GREE factory).
Minimum Cooler Flow: Minimum cooler flow will be based on the maximum permissible AT
across the cooler 14.5Maximum Cooler Flow:It Will be based on Minimum permissible AT across the cooler 5.4
Fluit Temperature
Cooler Flowrange:
23 GREE Central Air Conditioners 24GREE Central Air Conditioners
A protection against low ambient freeze-up is required for ambient temperatures below 32
(0 ) . Protection should be in the form of: Inhibited ethylene glycol or any other suitable glycol .
Any restrictions on units fan airflow will affect unit capacity, condenser head pressure, and
compressor power input. Such restrictions (i.e. not providing vertical clearance or lateral clear-
ance, insufficient unit-to-unit clearance ) will cause warm air re-circulation or coil starvation.
Minimum required operational and maintenance clearances around the unit are shown in the
figure below.
High outdoor ambient chiller start-up and operation are possible for chillers at ambient tempe-
ratures up to 125 52 ) at nominal voltage (for standard units). For higher ambient tempera-
ture please contact GREE factory.
Unit Location
Cooler Protection
Condenser Airflow
High Ambient Temperature
Air-Cooled Screw Chiller Technical Sales Guide
Recommended