gree central air conditioners gree central air conditioners · through the cooler to assure that...

3

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 3N~ 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


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


4.3 Physical Data

4.2 Unit Application Data

Voltage VariationMin./Max.

380V 3N 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

kBtu/h

TR

kW

Power Supply 380V 3N~ 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

kg3

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


NOTE: 1 mm=0.0394 in

-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


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


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 20 to 60 . 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


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


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


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


LSBLGF230MT3/Nb-M LSBLGF350MT3/Nb-M

15GREE Central Air Conditioners14 GREE Central Air Conditioners


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



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

g

Version

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 P=Provide for oneself

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

P

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





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; P= User Provided Parts

Scope of Supply Type Selection

PC P 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

P

P

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



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



Scope of Supply

S=Standard parts; O= User Optional; P= User Provided Parts

Scope of Supply Type Selection Remarks

optoelectronic isolated converter Rs232- Rs485

4-core twisted pair wire

3-way phone connector

S

O

P

P

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

ZJ522

One 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:


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


gree central air conditioners gree central air conditioners · through the cooler to assure that...

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