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INSTALLATION & OWNER’S MANUAL
Air-cooled Inverter Scroll Chiller
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
• Please retain this installation manual for future reference after reading it
thoroughly.
Original instruction
MODELS : ACHH Series
www.lg.com
P/NO : MFL67262613
2
TIPS FOR SAVING ENERGY
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TIPS FOR SAVING ENERGY
Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:
• Do not cool excessively indoors. This may be harmful for your health and may consume more
electricity.
• Block sunlight with blinds or curtains while you are operating the air conditioner.
• Keep doors or windows closed tightly while you are operating the air conditioner.
• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.
• Speed up the fan to cool or warm indoor air quickly, in a short period of time.
• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air conditioner is used for many hours.
• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the
air flow or weaken the cooling / dehumidifying functions.
For your records
Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:
Model number :
Serial number :
You can find them on a label on the side of each unit.
Dealer’s name :
Date of purchase :
IMPORTANT SAFETY INSTRUCTIONS
3
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid dangerous situations and ensure peak
performance of your product
! WARNING
It can result in serious injury or death when the directions are ignored
! CAUTION
It can result in minor injury or product damage when the directions are ignored
! WARNING
• Installation or repairs made by unqualified persons can result in hazards to you and others.
• Installation of all field wiring and components MUST conform with local building codes or, in the
absence of local codes, with the National Electrical Code 70 and the National Building Construction
and Safety Code or Canadian Electrical Code and National Building Code of Canada.
• The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments.
• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.
Installation
• Installation is to be performed by qualified personnel who are familiar with local codes and regulations.
- There is risk of fire, electric shock, explosion, or injury.
• 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.
• 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.
• When installing and moving the Product 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.
• 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.
• If the Product 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.
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IMPORTANT SAFETY INSTRUCTIONS
4
IMPORTANT SAFETY INSTRUCTIONS
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• Use the correctly rated breaker or fuse.
- There is risk of fire or electric shock.
• Have all electric work done by a licensed electrician according to 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.
• There must be no obstruction above the unit.
- It would deflect discharge air downward where it could be re-circulated back to the inlet of the condenser coil. The condenser fans are propeller type and will not operate with ductwork on the fan outlet.
• When transporting the product, use the forklift or spreader bar in accordance with the manual.
- Arbitrarily moving the product can cause product damage or injury.
• When moving the product using the forklift, check the weight of the chiller, size and length of the
fork to select the appropriate equipment.
- It can cause damage or injury.
• When hanging the product on the hoist to move the chiller, make sure that the load of the product is
evenly distributed and leveled during the move.
- It can cause damage or injury.
• When moving the product using the spreader bar, make sure to select the spreader bar with material and size to sufficiently support the strength spreader bar.
- Using inappropriate spreader bar can cause the product to fall and cause injury due to the strength or size.
• Always ground the product.
- There is risk of fire or electric shock.
• Do not store or use flammable gas or combustibles near the Product.
- There is risk of fire or failure of product.
• 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 LGE are used, fire or explosion may result.
• Ventilate before operating Product when gas leaked out.
- It may cause explosion, fire, and burn.
• Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress
air or Oxygen and Do not use Flammable gases. Otherwise, it may cause fire or explosion.
- There is the risk of death, injury, fire or explosion.
Use
• Do not damage or use an unspecified POWER CABLE.
- 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 installing and moving the Product 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.
IMPORTANT SAFETY INSTRUCTIONS
5
• Be cautious not to touch the sharp edges and coil.
- 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 during operation. (Do not touch the electrostatic filter, if
the unit is so equipped.)
- There is risk of physical injury, electric shock, or product failure.
• Be careful during valve checkout about hot gas line
- It may become hot enough to cause injury.
• Electric shock hazard. Can cause severe injury or death. Even when power to the panel is off, output
board could be connected to high voltage.
• Electric shock hazard. Turn off all power before doing any service.
! CAUTION
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.
• 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.
• 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 Product to operate erroneously, or fail to operate. On the
other hand, the Product may affect such equipment by creating noise that disturbs medical treatment or image broadcasting.
• 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 Product, 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.
• The operator must provide protection against water circuit freezing on all Product units.
- To prevent damage from freezing water.
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• When the product is soaked (flooded or submerged), contact an Authorized Service Center.
- There is risk of fire or electric shock.
6
IMPORTANT SAFETY INSTRUCTIONS
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Use
• Do not use the Product in special environments.
- Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the Product or damage
its parts.
• Make the connections securely so that the outside force of the cable may not be applied to the terminals.
- 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 Product 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.
• Be very careful about product transportation.
- Do not touch the heat exchanger fins. Doing so may cut your fingers.
- When transporting the outdoor unit, suspending it at the specified positions on the unit base. Also
support the outdoor unit at four points so that it cannot slip sideways.
• Safely dispose of the packing materials.
- Packing materials, such as nails and other metal or wooden parts, may cause stabs or other
injuries.
- 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 6 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.
• Do not touch any of the refrigerant piping during and after operation.
- It can cause a burn or frostbite.
• Do not operate the Product 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.
• When re-running the product after keep product long time in a low temperature conditions, touch
function may not work temporarily.
- Wait for a time. After time, product work normally.
• Do not insert hands or other objects through the air inlet or outlet while the Product is plugged in.
- There are sharp and moving parts that could cause personal injury.
• Field wiring must be installed according to unit wiring diagram.
- It may cause serious electrical damage can occur.
• Do not use an automotive grade antifreeze. Industrial grade glycols must be used. Automotive
antifreeze contains inhibitors which will cause plating on the copper tubes within the Product evaporator. The type and handling of glycol used must be consistent with local codes.
• Electrical power must be applied to the compressor crankcase heaters 3 hours before starting unit
to drive off refrigerant from the oil.
IMPORTANT SAFETY INSTRUCTIONS
7
• Service on this equipment is to be performed by qualified refrigeration personnel familiar with equipment operation, maintenance, correct servicing procedures, and the safety hazards inherent in this
work. Causes for repeated tripping of equipment protection controls must be investigated and corrected.
• Anyone servicing this equipment shall comply with the requirements set forth by the EPA in regards
to refrigerant reclamation and venting.
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• Any changes to these parameters must be determined and implemented by qualified personnel with
a thorough understanding of how these parameters affect the operation of the unit. Negligent or
improper adjustment of these controls can result in damage to the unit or personal injury.
8
TABLE OF CONTENTS
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TABLE OF CONTENTS
2
TIPS FOR SAVING
ENERGY
3
IMPORTANT SAFETY
INSTRUCTIONS
9
PRODUCT INTRODUCTION
9
11
General information
Product information
20 Control
20
25
26
40
48
50
Control panel configuration
Logging in to HMI
Introduction to HMI menu
Introduction to schedule menu
Introduction to record menu
View setting menu
62 FROM INSTALLATION
TO TEST RUN
63 INSTALLATION
63
70
72
75
76
82
83
86
88
89
Selecting installation location
Transportation method and precaution
Installing chiller
Snow protection
Water pipe connection
Electric specification
Electric work
How to set control box address (Set
cycle PCB address)
Provide running & alarm status (with
External Auto Control)
How to install HMI indoors
91 TEST RUN/ADDITIONAL
FUNCTION
91
93
Test run
Additional function
95 SELF DIAGNOSIS FUNCTION
97 HEAT SOURCE WATER
MANAGEMENT
97
98
99
100
100
101
Heat source water management
Heat source water quality management
standard table
Water pipe side strainer
Actions for problems in the test operation
Plate type heat exchanger maintenance
Daily inspection management
103 TROUBLESHOOTING
114 APPENDIX
PRODUCT INTRODUCTION
9
General information
Product information
Inverter Scroll Chiller of LG Electronics provides cold water for cooling air conditioning system
using AHU or FCU etc. Air Cooled R410A Refrigerant Scroll Chiller ACHH Series designed for outdoors is a single unit product of modular type composed of scroll compressor, air cooled condenser, electronic expansion valve, evaporator and LG HMI (Human Machine Interlock).
ACHH Series is composed of 2 inverter compressor to form independent refrigerant cycle and
one unit module can configure up to maximum of 3 refrigerantcycles and interlock of 5 modules
by using AC Smart controller and up to 10 modules by using ACP.
ACHH Series applies the inverter technology to the compressor and condenser fan motor for not
only high load but also highly efficient operation in all operating areas.
HMI controller of ACHH Series has the LG’s unique control logic to monitor all parameters controlling the operation. These parameters can be controlled to improve the operational efficiency
to continuously supply cold water by optimizing to the environment.
Each refrigerant cycle includes the check valve, electronic expansion valve, strainer and refrigerant charge valve. Evaporator connected to the cold water uses the plate type heat exchanger and
the condenser uses the air cooled fin and tube heat exchanger.
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PRODUCT INTRODUCTION
10 PRODUCT INTRODUCTION
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Model naming convention
A C A H 020 H B A A
Development number
Communication method : A = Modbus
Model type : A = Module model
B = Independent model
C = Slave model
Power
specification : L = 380~415 V/50,60 Hz/3 Ø
H = 460 V/60 Hz/3 Ø
Cooling capacity (RT) : 060 = 60 RT
040 = 40 RT
020 = 20 RT
Compressor type :
H = Scroll(High pressure type)
Cooled type : A = Air cooled C/O
H = Air cooled H/P
Product type : C = Chiller
Area of production Refrigerant :
A = South Korea R410A
Airborne Noise Emission
The A-weighted sound pressure emitted by this product is below 70 dB.
** The noise level can vary depending on the site.
The figures quoted are emission level and are not necessarily safe working levels. Whilst there is
a correlation between the emission and exposure levels, this cannot be used reliably to determine whether or not further precautions are required. Factor that influence the actual level of
exposure of the workforce include the characteristics of the work room and the other sources of
noise, i.e. the number of equipment and other adjacent processes and the length of time for
which an operator exposed to the noise. Also, the permissible exposure level can vary from country to country. This information, however, will enable the user of the equipment to make a better
evaluation of the hazard and risk.
PRODUCT INTRODUCTION
11
Feature
ACHH020LBAA
20 RT
ACHH040LBAA ACHH060LBAA
40 RT
60 RT
3, 4, 380-415, 50
65
130
195
70
140
210
21.7
43.3
65
21.2
42.4
63.6
3
3
3
3.3
3.3
3.3
5
5
5
Modbus, Interface
Scroll
2
4
6
FVC68D(PVE)
1 400 x 2
1 400 x 4
1 400 x 6
60 x 2
60 x 4
60 x 6
R410A
14
14 x 2
14 x 3
Alumium Fin & Copper Tube
Wide Louver
Ø7
Plate
Power Supply
Ø, Wire, V, Hz
Cooling Rating
kW
Cooling
Capacity
Heating Rating
kW
Cooling Rating
kW
Input
Heating Rating
kW
Cooling
W/W
COP
Heating
W/W
IPLV
Rating
W/W
Remote Control Type
Rating
Number
EA
Compressor Oil Type
Oil Charge
cc
Sump Heater
W
Name
Refrigerant
Charge
kg
Type
Condenser Fin type
Pipeline diameter
mm
Type
Water resistance
kPa
30
loss
Max. Pressure
MPa
4.2/1
Refrigerant/Water
Evaporator
Standard water flow
volume
LPM
180/190
360/380
540/570
cooling/heating
Water pipeline
Inlet/Outlet
40 A/40 A
65 A/65 A
65 A/65 A
diameter
Type
BLDC motor
Number
EA
2
4
6
Fan
Air Flow Volume
CMM
210 x 2 @900 rpm 210 x 4 @900 rpm 210 x 6 @900 rpm
Motor output x
W
900 x 2
900 x 4
900 x 6
Number
Expansion valve
Electronic Expansion Valve
Net Weight
kg
540
1 030
1 530
W
mm
765
1 528
2 291
Dimension H
mm
2 354
2 354
2 354
D
mm
2 154
2 154
2 154
Fuse capacity
A
75
125
200
Notes :
1. Due to our policy of innovation some specifications may be changed without prior notification
2. Slave Unit dons’t have HMI, Only Main Unit have HMI.
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Product information
12 PRODUCT INTRODUCTION
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Product configuration
This chiller model is configured as shown below.
1
2
Legend
5
4
8
1. Fan motor
2. Fin & tube heat exchanger
3. Main Controller box
4. Sub Controller box
5. Condenser cover
6. Rope support
7. Forklift groove
8. Side cover
3
6
7
Cooling cycle
ACHH Series uses the high pressure type scroll compressor, and the suction gas part is separated from the high pressure discharge part and the motor is installed on the low pressure gas part.
Space for motor and storage for refrigerant is secured in the low pressure gas part to increase
the reliability for the liquid compression.
Because the sucked refrigerant gas cools the motor and flows to the compressor, separate cooling device to cool the compressor is not required. Inside the system, oil to lubricate the compressor is mixed with the refrigerant to discharge both the oil and refrigerant during the operation.
Because the oil discharged from the compressor can reduce the heat transfer efficiency when
thick layer is built up on the inner walls of the condenser and evaporator, device to prevent the
refrigerant and oil to be discharged together is added to prevent this issue.
This lubrication system ensures longer life for the compressor, improves the sealing of the compression space and provides low noise operation.
As the air cooled fin and tube type heat exchanger, the condenser is composed of heat exchanger in V shape, and the electronic expansion valve is used for efficient control in all load conditions.
The controller used in the chiller is exclusively for LG and monitors various sensors installed on
the product to protect the product.
For continuous supply of cold and hot water, the product is equipped with maximum continuous
operational function and also provides precision control to supply accurate target amount of cold
and hot water.
But the protective devices will immediately stop the product when the product reaches abnormal
condition or area limit.
In case of an issue, the controller of the chiller will provide helpful diagnostic message to the
administrator.
PRODUCT INTRODUCTION 13
Pressure
‫ڻ‬
‫ڼ‬
‫ں‬
‫ڹ‬
‫ڸ‬
Enthalpy
Lubrication system
Oil is efficiently separated inside the scroll compressor and even when the cycle operates, most
of the oil remains inside the scroll compressor. Only part of the oil will be mixed with the refrigerant to be circulated within the cycle.
Partial load operation
Each cooling cycle operates independently and 1 cooling cycle is composed of 2 inverter compressor as shown below.
2 Inverter compressors increase the RPM after staring to operate to gradually increase the cooling capacity.
The user can operate the product smoothly at optimal condition by setting the cooling capacity
based on the linear control of LG Chiller Controller and the product has efficient partial load performance at any load.
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Description of cooling cycle
The cooling cycle of ACHH Series can be described using the following Pressure – Enthalpy
chart.
①,②,③,④ and ⑤ in the following chart shows the conditions of the refrigerant. The refrigerant
comes into the compressor motor and cools the motor, and becomes overheated and moves to
the suction inlet of the compressor. The oil inside the compressor seals the gap between the
compressor scrolls and provides lubrication for the bearing to help the compression of the refrigerant. During this time, the refrigerant is compressed and is discharged to the air cooled condenser. (②) The compressed refrigerant passes through the air cooled condenser and exchanges
the heat with the outdoor air. The condensed refrigerant then passes the condenser to be overcooled. (②→③→④). The refrigerant that passed through the condenser expands in the electronic
expansion valve to flow to the evaporator. (④→⑤). The refrigerant is evaporated in the plate type
heat exchanger, the evaporator. (⑤→①) Liquid refrigerant of low temperature pressure passes
through the evaporator to cool the water flowing into the evaporator and the refrigerant itself
receives the heat to evaporate to gas condition. (①) The refrigerant continues to change the
phase and continuously repeats the cooling cycle. For heating, the refrigerant flows in the
reverse direction to provide hot water.
14 PRODUCT INTRODUCTION
ENGLISH
Cooling capacity
Inverter
compressor 1
Inverter
compressor 2
Capacity (%)
100 %
75 %
50 %
25 %
0%
25 %
50 %
75 %
100 % Load (%)
Cooling capacity
Static speed compressor 1
Cycle configuration and sensor location
This chiller model is configured as shown below.
20RT
Cooling
M
Heating
M
Air Cooled
Condensor
Sub-cooler
M
Air Cooled
Condensor
Fan motor
4 way valve
Pressure sensor
Pressure switch
Temperature sensor
S
Water-out
Accumulator
Solenoid valve
Check valve
Strainer
Inverter
Compressor1
Water-in
Receiver
Inverter
Compressor2
PHEX
Oil separator
Oil separator
S
Electonic expantion
Valve
Expansion valve
S
PRODUCT INTRODUCTION 15
ENGLISH
Air Cooled
Condensor
40RT
Cooling
Air Cooled
Condensor
Oil separator
Inverter
Compressor 2
Heating
M
Inverter
Compressor 1
M
M
Oil separator
Fan motor
4 way valve
Pressure sensor
Pressure switch
Receiver
Accumulator
S
Temperature sensor
S
S
Solenoid valve
Check valve
Electonic expantion
Valve
Expansion valve
Air Cooled
Condensor
Oil separator
Inverter
Compressor 1
M
PHEX
S
Receiver
Accumulator
S
Sub-cooler
M
Oil separator
Inverter
Compressor 2
Air Cooled
Condensor
PHEX
Sub-cooler
Strainer
PHEX
Sub-cooler
Oil separator
Inverter
Compressor 2
Oil separator
Inverter
Compressor 1
Air Cooled
Condensor
PHEX
Sub-cooler
Oil separator
Inverter
Compressor 2
Oil separator
Inverter
Compressor 1
M
M
Air Cooled
Condensor
PHEX
Sub-cooler
S
Receiver
Accumulator
Inverter
Compressor 1
Air Cooled
Condensor
Oil separator
Receiver
Accumulator
Air Cooled
Condensor
Inverter
Compressor 2
M
M
Oil separator
Receiver
Accumulator
M
M
Air Cooled
Condensor
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Air Cooled
Condensor
16 PRODUCT INTRODUCTION
60RT
Cooling
Heating
S
M
S
S
S
S
S
Fan motor
4 way valve
Pressure sensor
Pressure switch
Solenoid valve
Temperature sensor
Check valve
Strainer
Electonic expantion
Valve
Expansion valve
PRODUCT INTRODUCTION 17
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List of safety device and setting
No.
Safety device
Setting
-30% of rated
flow
Function
Prevent evaporator from freezing
1
Flow switch
2
High pressure
switch
3
Fuse
4
Compressor circuit breaker
35 A
Measures and stops over-current per compressor
5
Fan motor circuit
breaker
7A
Measures and stops over-current per motor
6
Discharge temperature sensor
110 °C
7
High pressure
sensor
3 801 KPa
Starts protective operation control to reduce the
cycle pressure
8
Low pressure
sensor
0.22 MPa
Starts protective operation control to raise the
cycle pressure
9
Water pipe temperature sensor
Off : 3 °C
Prevent evaporator from freezing
10
Reverse phase
detector
-
Compares the current of each phase and stops
when it is in reverse phase
11
Liquid compressor prevention
-
Discharge over-heating level goes up to prevent
liquid compression
12
Compressor ratio
limit
9
Compressor frequency is reduced when operating
at high compression ratio to prevent the internal
parts within the compressor from being damaged
3.8 MPa
(Detects appropriate flow of cold water and stops
if there is any abnormal situation)
Stops operation of the module when the pressure
is above the setting
250 V 10 A (Main) Disconnects current when it exceeds the normal
250 V 5 A (INV) value
Stops compressor in stages
18 PRODUCT INTRODUCTION
ENGLISH
Operation range and limit
The following table shows the operation range of the product. Do not operate the product
exceeding the following operation range.
Operation
range
Voltage
V
342~457
Demand limit
%
10 ~ 140
Cold water inlet temperature
°C
8 or above
Cold water outlet temperature
°C
5 ~ 15
Heat water inlet temperature
°C
25 ~ 52
Heat water outlet temperature
°C
35 ~ 55
Cooling
°C
-10 ~ 48
Heating
°C
-15 ~ 26
Outdoor temperature
(1) Product performance range at rated condition is 10-110 %.
- Cooling rate condition: Outdoor temperature 35 °C, Water inlet temp. 12 ˚C. Water Outlet
temp. 7 ˚C
- Heating rate condition: Outdoor temperature 7 ˚C, Water inlet temp. 40 ˚C. Water Outlet
temp. 45 ˚C
(2) Demand limit setting target is the power consumption, and 100 % reference is the rated
power and the range of setting is 10-140 %.
(3) When running heating operating with outdoor temperature is less than 7˚C, Inlet water temperature must be at least 20 °C
PRODUCT INTRODUCTION 19
ENGLISH
Operation range of heating mode
Water temperature
26°C
55°C
52°C
50°C
45°C
40°C
42°C
35°C
Outlet water temperature
Inlet water temperature
30°C
25°C
-15°C
-5°C
5°C
15°C
25°C
35°C
45°C
Outdoor temperature
Operation range of cooling mode
Water temperature
25 °C
20 °C
15 °C
Outlet water temperature
Inlet water temperature
10 °C
8 °C
5 °C
-20 °C -10 °C
0 °C 10 °C 20 °C 30 °C 40 °C 50 °C
Outdoor temperature
! CAUTION
When running cooling operation with outdoor temperature is less than -10 °C, depending on
inlet temperature, the product does not operate normally, or can take a long time for running.
In this case, Please running operation After raising the inlet temperature by circulating load
water.
20 Control
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Control
Control panel configuration
Communication module
Main controller
Power supply 1, 2
Terminal block 2
Terminal block 1
Terminal block 3
Terminal block 3
HMI
Sub Control Box
Power Box
Control Box
<Inside control panel>
• HMI (Human Machine Interface)
This is for basic product setting and command, and shows the information of product and each
cycle.
• Main controller
This controls the input/output port and the communication with each cycle.
• Power supply 1, 2
This supplies the power to the main controller and HMI.
• Communication module
This controls the communication between the main controller and each cycle.
• Terminal block 1
This is the terminal block that receives the main power externally.
• Terminal block 2
This is terminal block of which the input/output is connected to the chiller controller and is electrically wired internally within the panel.
• Terminal block 3
This is the terminal block that receives the Power Box.
Control 21
Digital output
Analog input
Digital input
<Main controller of chiller>
Classification
Analog input
Digital input
Digital output
Name
Number
Description
TH_Water_In (L)
(Common load inlet water)
This receives the common load inlet
CN_201
water temperature value.
TH_Water_Out (L)
(Common load outlet water)
This receives the common load outlet
CN_201 water temperature value.
(Not used in 20RT model.)
TH_Ambient
(Outdoor temperature)
CN_201
This receives the outdoor temperature
value.
Flow Switch (L)
(Load water flow switch)
CN_401
This receives whether the flow is
formed for the load water.
Remote Start
(Remote operation)
This receives the operation command
CN_402 from external controller and contact
point.
Remote Alarm
(Remote alarm)
This receives whether error occurs
CN_403 from the external controller and contact
point.
Pump Interlock
(Load water pump interlock)
This receives the operating condition of
CN_404 the pump after the pump operation output/
Pump Output
(Load water pump output)
CN_501
Thermal Heater
(Heater output)
CN_501 This supplies the power to the heater.
Alarm Lamp
(Alarm Status)
CN_501
Current Alarm Status
Non-Volt Relay Output
Running Lamp
(Running Status)
CN_501
Current Running Status
Non-Volt Relay Output
This gives the operation command for
the load water pump.
ENGLISH
The input/output port of the main controller of the chiller is configured as shown below. The functions are as shown below.
22 Control
ENGLISH
Chiller controller rotary, dip switch setting
Switch location
SW107
SW101
SW104
SW105
SW_RI_Select1
SW_AI_Select
SW103
SW_RI_Select2
Chiller controller has the dip switch and rotary switch as shown below and the hardware port
input method and option can be set.
Input method setting dip switch
Each dip switch setting has the function to decide the input method of the hardware port and the
air cooled chiller receives the temperature input of resistance type. Therefore the dip switch is
set as shown below by default.
Do not change the default setting of the dip switch.
: Switch OFF
Name
Switch setting
: Switch ON
Description
SW_AI Switch
#1 and #2 ON
#3~#8 OFF
SW_RI 1 Switch
#1 and #2 OFF
#3~#8 ON
SW_RI 2 Switch
#1 and #2 OFF
#3~#8 ON
Control 23
Option setting dip switch can be additionally set when functions are added in the future, and it is
set as shown below by default.
: Switch OFF
: Switch ON
Name
Switch setting
Description
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
Not used
All OFF
SW101
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
SW104
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
SW105
#1 : Freeze Protection option Use
#3 : Alarm automatic rest option
#2, #4-#8 : Not used
#1 : Cooling(OFF), Heating(ON)
#2 : Air cooled(OFF), Water cooled(ON)
#3,#4 : Number of cycle
#5-#7 : Not used
#8 : Normal operation(ON),Onboarding(OFF)
①②
Not used
All OFF
SW107
SW105 detail setting
Name
Switch setting
Description
20RT cooling only
#1-#7 OFF
#8 ON
20RT Heat Pump
#2- #7 OFF
#1, #8 ON
40RT cooling only
#1-#3, #5-#7 OFF
#4, #8 ON
40RT Heat Pump
#2- #3, #5-#7 OFF
#1, #4, #8 ON
60RT cooling only
#1-#2, #4-#7 OF °CF
#3, #8 ON
60RT Heat Pump
#2, #4-#7 OFF
#1, #3, #8 ON
#8 dip switch of SW105 is set to ON in normal condition and is used as the dip switch for the
service to upgrade the program. Generally in normal condition it should always be set to ON.
! CAUTION
Default dip switch is set to factor default to fit the product. Resetting the dip switch may
block the product from operating normally and can cause product failure. Therefore maintain
the default setting while using the product.
ENGLISH
Option setting dip switch
24 Control
ENGLISH
SW104 detail setting
: Switch OFF
Name
Switch setting
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
Freeze protection option
: Switch ON
Description
#1 ON : Freeze protection
option inactivation
#1 OFF : Freeze protection
option activation
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
#3 ON : Alarm manual reset
#3 OFF : Alarm automatic reset
Alarm automatic reset option
Rotary switch ( SW103 )
Rotary switch has the function to set the unique address value for communication with the main
controller when multiple main controllers are installed, and is set as shown below.
[Default setting]
- SW103 Rotary Switch SW103 rotary switch is the switch to set the address of chiller PCB and the default value is “0”,
and can be set from 0 to 2 based on the address condition. After changing the address, the
power must be reset to apply the changed address.
! CAUTION
The rotary switch of the chiller controller can be set from 0 to F and the default address is set
to “0”.
When changing the address, it must be aligned to the address of HMI to operate normally.
(For details on setting the address of HMI, refer to HMI address setting)
Control 25
This chapter will explain about the composition of each screen in HMI, detail functions, and operation methods. When power is applied to HMI, HMI automatically operates. When HMI starts,
Home screen appears.
! CAUTION
When HMI is installed indoors, the guaranteed communication distance is 500 m.
- Guaranteed communication distance of HMI: 500 m
(But, when connected indoor, the end resistance (100-200 Ω) must be installed at the terminal connected to HMI for smooth communication. In this case, if the installation location of
the Unit is different from that of HMI, the maximum permitted connection distance of the
communication cable between the two locations is displayed.)
ENGLISH
Logging in to HMI
26 Control
ENGLISH
Introduction to HMI menu
This chapter describes the HMI menus to know to operate the product and how the screen is configured.
HMI main screen configuration
After logging in to HMI, the system view screen that shows the common information of the product is displayed as shown below.
Icon
Description
You can see the load water temperature, pump/flow amount status, and system information.
It sets the start/stop, set temperature, operation mode (only for Heat pump
model), control mode, and demand operation ratio.
It checks the individual cycle’s operation information.
It checks the set schedule.
It checks the occurred error history.
It sets the installer setting, screen setting, and system setting.
It returns to the previous menu.
Home screen appears.
Control 27
Chiller information is composed of the load water temperature, pump/flow amount status, and
system information.
• Load water temperature screen
Icon
Description
E.W.T
It shows the common load entering water temperature value.
L.W.T
It shows the common load leaving water temperature value.
ENGLISH
View chiller information
28 Control
ENGLISH
• Pump/flow amount status screen
Icon
Description
Pump Output
If it is in operation, it always maintains ON, and when the product operation is
stopped, the freeze and burst mode is applied, and the freeze and burst prevention
mode operates as follows.
According to the outdoor air temperature condition, the load water pump repeats
operation ON and OFF.
Outdoor air temperature < 1 °C → always “ON”
1 °C ≤ outdoor air temperature < 5 °C → 2 min. operation and 18 min. stop
Outdoor air temperature ≥ 5 °C → operation “OFF”
The freeze and burst prevention mode is possible when the pump is connected, and
to interface with the pump, Pump Output connect shall be connected, and to check
whether the pump operates, Pump Interlock connector shall be connected.
(For the connector connection method, refer to the connection diagram.)
Pump Interlock
It receives the status of the load water pump output through the external signal contact point of the pump.
(When the product is in operation, the pump output shall maintain “ON” state, and
otherwise, alarm will occur.)
Flow Switch
Capacity
It shows the current load water’s flow amount switch status value.
(When the product is in operation, the pump output shall maintain “ON” state, and
otherwise, alarm will occur.)
It shows the capacity of the device.
Control 29
ENGLISH
• System information screen
Icon
Description
Setting Temp.
It shows the set temperature for the current operation mode.
Outdoor Temp.
It shows the current outdoor air temperature value.
Operation Current It shows the operation compressor’s overall operation current value.
Starting Delay
It shows the time of the standby state before starting the product.
30 Control
ENGLISH
Chiller control
Chiller control sets the start/stop, set temperature, operation mode (only for Heat pump model),
control mode, and demand operation ratio.
Icon
Description
It selects the start and stop signal command of the product.
It sets the target temperature value for the current operation mode.
(Cooling: 5.0~15.0 °C, heating: 35.0~55.0 °C)
It sets the cooling/heating operation mode.
It selects the control mode of the signal command method for the product control.
The demand operation ratio is the function to limit the operation capacity as much as
the control ratio set by the user to save energy.
(Setting boundary: 0 % ~ 140 %)
If the demand operation is not used, set the demand operation ratio to 0 %.
The demand control ratio setting unit is 10 %.
Control 31
• Setting temperature
If you touch the area where the chiller control’s set temperature is displayed, a popup window
to input the setting temperature is displayed.
In the temperature setting popup window, you can change the temperature with up/down arrow
input, and if you touch the temperature setting display area, you can input the setting temperature input with numeric keyboard.
ENGLISH
• ON/OFF
When you touch the ON button, a popup window to select ON/OFF is displayed.
32 Control
ENGLISH
After changing the temperature setting, if you press Apply, the set value is reflected, and if you
press Cancel, the previous setting is maintained.
• Operation mode
If you touch the chiller control’s operation mode area, a popup window to set the operation
mode is displayed.
After changing the operation mode, if you press Apply, the set value is reflected, and if you press
Cancel, the previous setting is maintained.
Control 33
After selecting the desired control mode, if you press Apply, the selected control mode is
applied, and if you press Cancel, the previous setting is maintained.
Icon
Description
Manual control mode through HMI
If the schedule mode is set, manual and remote control are not possible, and only the
start/stop by the schedule is possible.
ON/OFF is only possible by the chiller controller’s “Remote Start” signal.
ON/OFF is only possible by the external MODBUS communication.
ENGLISH
• Control mode
If you touch the chiller control’s control mode area, a popup window to set the control mode is
displayed.
34 Control
ENGLISH
! CAUTION
If the product enters the modbus remote mode, all the information can only be monitored via
HMI, and the actual operation of starting/stopping or changing the set temperature can only
be done through the external controller.
To make changes to control from HMI, change the control mode to “Local”.
! CAUTION
CH10009 remote communication error will occur when the communication is disconnected
between the two controllers. When the communication is recovered, it will automatically
resume. If the remote modbus connection is not used, reset the power of the main PCB of
the unit to cancel the alarm.
The protocol details provided for modbus interlock of external device are as follows.
- Physical Layer : RS-485 Serial Line
- Mode : MODBUS RTU Mode
- Baud Rate : 9 600
- Parity : None Parity
- 1 Stop Bit
- Applied Function Code
Function
Code
Sub Function
Function Name
Start Address form Master
Device
0x01
None
Read Coil Register
Address-1
0x02
None
Read Discrete Input
Register Address-10001
0x03
None
Read Holding
Register Address-40001
0x04
None
Read Input
Register Address-30001
0x05
None
Write Single Coil
Register Address-1
0x06
None
Write Single Holding
Register Address-40001
0xF1~FF
Reserved for Exception Code
Refer to the modbus protocol in the Appendix for the protocols provided.
Control 35
In the demand control ratio popup window, you can control the demand control ratio with
up/down arrow input.
ENGLISH
• Demand control ratio
If you touch the demand control ratio area, a popup window to input the demand operation ratio
is displayed.
36 Control
ENGLISH
Cycle information screen composition
To enter the cycle information screen, press the cycle information button in Home screen.
Icon
Description
It shows the currently selected cycle.
You can select the cycle information and the cycle temperature.
It shows the status value of the 4-way valve during the cooling/heating
switching. (It is the item that is displayed only in the cooling/heating
combined model.)
It shows the status of the over-cooling bypass valve.
It shows the current operation status of No. 1 inverter compressor.
It shows the current operation status of No. 2 inverter compressor.
Control 37
ENGLISH
Icon
Description
It shows the inverter compressor’s operation frequency value.
It shows the current EEV pulse signal value.
It shows the current high pressure value.
It shows the current low pressure value.
38 Control
ENGLISH
• Cycle temperature
Icon
Description
It shows the corresponding cycle’s load leaving water temperature value.
It shows the corresponding cycle’s saturated condensing temperature value.
It shows the corresponding cycle’s evaporation temperature value.
It shows the corresponding cycle’s liquid pipe temperature value.
Control 39
ENGLISH
Icon
Description
It shows the cycle’s HEX temperature value.
It shows the corresponding cycle compressor’s average suction temperature
value.
It shows the inverter compressor No. 1 compressor’s discharge temperature
value.
It shows the inverter compressor No. 2 compressor’s discharge temperature
value.
40 Control
ENGLISH
Introduction to schedule menu
This chapter describes the schedule menu and screen composition that you need to know to
operate the schedule of the product.
View schedule screen
In Home screen, if you press the schedule icon, the schedule screen appears.
<Month>
<Weel>
<List>
Icon
Description
You can check the monthly set schedule at a glance.
You can check the start time of the schedule and the set operation mode.
You can check the set schedule in a list.
Control 41
button at the top right side.
2. As follows, when Add screen appears, input the basic schedule information.
① When you press the name area, a popup window to input the schedule name is displayed.
Input the name to use, and press Apply button. If Cancel button is pressed, the previous
setting is maintained.
ENGLISH
• Add schedule
1. In the schedule viewing screen, press
42 Control
ENGLISH
② When you press the date area, a popup window to set the date is displayed. Set the start
date and end date to use the schedule operation, and press Apply button. If Cancel button is
pressed, the previous setting is maintained.
③ When you press the time area, a popup window to set the time is displayed. Set the time to
use the schedule operation, and press Apply button. If Cancel button is pressed, the previous setting is maintained.
④ When you press the day of week selection area, a popup window to select day of week is
displayed. Select the day of week to use the schedule operation, and press Apply button. If
Cancel button is pressed, the previous setting is maintained.
Control 43
button, a screen to set the detail
① When you press the mode area, a popup window to select the mode is displayed. Select the
operation mode to use the schedule operation, and press Apply button. If Cancel is pressed,
the previous setting is maintained.
② When you press the area where the set temperature is displayed, a popup window to input
the temperature setting is displayed. Set the temperature to use, and press Apply button. If
Cancel is pressed, the previous setting is maintained.
ENGLISH
3. After the input of the basic information, if you press
information is displayed.
44 Control
③ When you press the ON/OFF button, a popup window to select ON/OFF is displayed. Decide
whether to ON or OFF the schedule operation to use, press the button to use, and press
Apply button. If Cancel is pressed, the previous setting is maintained.
④ When you touch the demand control ratio area, a popup window to input the demand control
ratio is displayed. Select the value to set, and press Apply button. If Cancel is pressed, the
previous setting is maintained.
Control 45
4. After the input of all detail information, when you press Apply button of the chiller control, the
schedule addition is completed. If Cancel is pressed, the previous setting is maintained.
46 Control
• Edit schedule
1. In View schedule _ List screen, select the schedule to edit.
2. When the popup window of the selected schedule is displayed, press the button to work.
Icon
Description
Popup window saying “Do you want to delete the selected schedule?” is displayed, and when you press Apply button, it is deleted from the list.
A popup window to edit is displayed, and set with the same method as the
schedule addition.
It maintains the current setting, and the popup window disappears.
Control 47
• Schedule list edit
1. In View schedule _ List screen, press
button at the top right side.
2. When the screen to edit the list appears, carry out the schedule addition and list deletion work.
Icon
Description
When Add button is pressed, it moves to the schedule addition screen.
When you select a list to delete, Delete button is activated, and when you press
Delete button, the selected list is deleted.
48 Control
Introduction to record menu
This chapter describes how to check the record of the events that triggers the alarm.
• Error screen composition
The occurred error history is stored in the order of the occurred time, and according to the
selection, you can check for day, week, and month.
• View detail information
When you select a history to view in detail, detail information popup window is displayed. It
shows the error occurrence date, time, address, code, and the information of the error code.
When you press Confirm, the popup window disappears.
Control 49
• Delete history
When you press
button at the top right side of Error screen, a popup window to input
password is displayed.
Input the password, and when you press Apply button, all error histories will be deleted.
※The clear function is for the service, and the password will not be provided to the customers.
50 Control
View setting menu
This chapter describes the setting menu’s screen and the setting method required for the operation of the product.
Setting screen composition
In Home screen, when you press the setting button, you can enter the setting screen, and the
following screen appears.
Device
In the setting screen, when you press the device icon, device screen appears.
Icon
Description
Edit Unit Address
The initial value is 1. If the chiller’s main PCB address is changed to interface with automatic control (or ACP) and MODBUS communication, you
need to set the HMI’s chiller address setting value as the same as the main
controller.
System Password It is a function for the service, and it is restricted.
Control 51
• Edit Unit Address
In Home screen, when you press the setting button, you can enter the setting screen, and the
following screen appears.
Input the desired address, and press Apply button. If Cancel is pressed, the previous setting is
maintained.
52 Control
ENGLISH
* Setting product address
The product address must be in both main PCB of unit and HMI. If the two addresses are not
the same, there will be an error in HMI communication.
* Setting address of main PCB of unit
Turn the rotary switch of SW103 of the main PCB of the unit to set the address value.
Address used in the product can be set in the range of 0 - 4.
After the address setting has been changed, the power of the main PCB of the unit must be
reset to apply the changed address.
* Setting HMI address
The address of unit 1 can be changed in the HMI service setting in the range of 1-16.
When changing the address from HMI, the changed address will be applied immediately.
Address of main PCB of unit and address of the HMI communicate as shown below.
When resetting the address, refer to the address to reset.
Address
Main PCB of unit
HMI
Address1
Rotary switch: 0
01
Address2
Rotary switch: 1
02
Address3
Rotary switch: 2
03
Address4
Rotary switch: 3
04
Address5
Rotary switch: 4
05
* To set the control box address of the outdoor unit, refer to the “Setting control box address” of
installation part.
! CAUTION
If you reset the address in HMI while the product is operating, it will cause a communication
error and stop the product. Always reset the address after the product has stopped completely.
Control 53
In the setting screen, when you press the screen icon, Screen appears.
Screen saver waiting time
Icon
Description
Select whether to use the screen saver.
It sets the waiting time to display the screen saver.
It sets the time to change to the minimum brightness of the screen
when there is no touch input.
It adjusts the screen brightness according to the ambient illumination
intensity.
ENGLISH
Screen
54 Control
ENGLISH
• Screen saver
When you press the screen saver area, the screen saver window is displayed.
① Press the area indicating whether to use the screen saver. Whenever you press the area,
the selected value is changed.
② When whether to use the screen saver is selected as Use, the screen saver preview is activated, and when you press the activated area, you can see the set screen saver in advance.
③ When you press Apply button of the screen saver, the selected setting is applied, and if Cancel is pressed, the previous setting is maintained.
Control 55
Screen saver waiting time
After selecting the time to apply, press Apply button. If Cancel is pressed, the previous setting
is maintained.
• Monitor power off
When you press the screen power saving area, the screen power saving window is displayed.
After selecting the time to apply, press Apply button. If Cancel is pressed, the previous setting
is maintained.
• Brightness
When you press the screen brightness area, the screen brightness window is displayed.
After setting the desired brightness by pressing the –and + button at the left/right, press Apply
button. If Cancel is pressed, the previous setting is maintained. The screen brightness can be
selected among 25 %, 50 %, 75 %, and 100 %.
ENGLISH
• Screen saver waiting time
When you press the screen saver standby area, the screen saver standby window is displayed.
56 Control
ENGLISH
System (Normal)
When you press the system icon, System screen appears. System is divided to normal and
advance.
Icon
Description
It is the base value of the date recognized by the product, and the date
display and the schedule interface date, etc. are operated based on the
set date.
It is the base value of the time recognized by the product, and the time
display and the schedule interface time, etc. are operated based on the
set time.
Input and edit the controller’s name, and the applied name is displayed at
the top left side of Home screen.
It selects whether to use the touch sound.
It selects the unit of the temperature to be displayed on the controller.
(℃ or ℉ can be selected)
It selects the language displayed on the controller. (Korean or English can
be selected)
Control 57
After selecting the date to set by pressing up/down button, press Apply button. If Cancel is
pressed, the previous setting is maintained.
• Time
In the System, when you press the time area, a window to set the time is displayed.
After selecting the time to set by pressing up/down button, press Apply button. If Cancel is
pressed, the previous setting is maintained.
• Controller name edit
In the System, when you press the controller name edit area, a window to edit the controller
name is displayed.
After the input of the desired name, press Apply button. If Cancel is pressed, the previous setting is maintained.
ENGLISH
• Date
In the System, when you press the date area, a window to set the date is displayed.
58 Control
ENGLISH
• Speaker
In the System, whenever you press the touch speaker area, it toggles between Use and Do not
use. There is no separate Apply button.
• Temperature unit
In the System, when you press the temperature unit area, a window to change the temperature
unit is displayed.
In the screen, when you press temperature unit area, the temperature unit is changed. In Celsius unit, the minimum temperature unit can be selected between 1 ℃ and 0.5 ℃. When you
press Apply, the setting is applied, and if Cancel is pressed, the previous setting is maintained.
• Language
In the System, when you press language setting area, the window to set the language is displayed.
Select the desired language, and press Apply button. If Cancel is pressed, the previous setting
is maintained.
Control 59
When you press the system icon, the System normal screen is displayed, and when you set
Advance, the following screen appears.
Icon
Description
It shows the software version of the controller.
It shows the contents of the open source
It shows the overall operation time of the product. The clear function is
for the service, and the customer usage is restricted.
ENGLISH
System(Advance)
60 Control
ENGLISH
• Version information
In the System advance screen, when you press Version information area, a popup window to
check the version information is displayed.
Check the current version, and when you press OK button, the popup window disappears.
• Open source license
In the System advance screen, when you press Open source license area, you can check the
contents of Open source license.
※The clear function is for the service, and the password will not be provided to the customers.
Control 61
Function
Code
Sub Function
0x01
None
Read Coil Register
Address-1
0x02
None
Read Discrete Input
Register Address-10001
0x03
None
Read Holding
Register Address-40001
0x04
None
Read Input
Register Address-30001
0x05
None
Write Single Coil
Register Address-1
0x06
None
Write Single Holding
Register Address-40001
0xF1~FF
Reserved for Exception Code
Function Name
Start Address form Master
Device
Refer to the modbus protocol in the Appendix for the protocols provided.
ENGLISH
The protocol details provided for modbus interlock of external device are as follows.
- Physical Layer : RS-485 Serial Line
- Mode : MODBUS RTU Mode
- Baud Rate : 9 600
- Parity : None Parity
- 1 Stop Bit
- Applied Function Code
62 FROM INSTALLATION TO TEST RUN
ENGLISH
FROM INSTALLATION TO TEST RUN
Flowchart from installation to test run
Start
Delivery and
installation
Construction for base installation
Delivery and installation
Wiring and piping
Set control address
Test operation
Check before starting
Check during and after starting
Stop
Load operation and operation adjustment
Prepare operation data
Analyze water quality of cold water
Guide operation
End
INSTALLATION 63
Selecting installation location
Because the user operating the product varies based on the mode setting item of the user setting, set up and operate the product as shown below.
Details to consider when selecting the installation location
Select the location that fits the following conditions to install the product.
• Location without direct heat from other heat source
• Location where noise of the chiller does not have negative impact to the neighbors
• Check the installation direction of the unit for the seasonal wind during the winter.
Install the product so that the seasonal wind does not affect only one side of the product.
• Location not exposed to strong winds
• Location that can support the weight of the chiller
• Location with space for air flow and service
• Install the boundary sign, danger sign or barricade, if necessary.
• It is recommended to install a fence around chiller so that people or animals will not be able to
access the area.
• When installing the product in areas with high humidity during the winter (Coast, seaside, lakeside), install the product where it is well ventilated and has plenty of exposure to sunlight. (Ex:
Roof top with sunlight)
• If the product does not run during the winter, establish a plan to use the anti-freeze for the
water supply.
• To prevent the condensed water from flowing, insulate the connected evaporator and pipe.
• To smoothly drain the condensed water, establish an inclined structure.
• Avoid installing the product at locations with the following conditions.
- Location with corrosive gas such as acid or alkali gas.
(Coolant can leak from the corroded pipes.)
- Location with electromagnetic wave.
(It can cause the product to malfunction from defective parts.)
- Location where flammable gas is generated or flows to prevent fire.
- Location with high level of carbon fiber or dust
- Special location exposed to oil, steam or emulsified gas
Precaution for seasonal wind and winter season
In areas with heavy snow or in extremely cold areas, sufficient planning is required for the product to run smoothly.
Even in other areas, planning is required for seasonal wind during the winter season.
• Snow can go into the air discharge outlet of the condenser to freeze inside the chiller. Therefore install a large cover over the chiller for areas with heavy snowfall to prevent the snow from
accumulating on the top.
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INSTALLATION
64 INSTALLATION
ENGLISH
• The chiller can freeze inside when the air inlet is clogged with snow. Therefore install the chiller
on the base with at least twice the height of the average snow accumulation.
(Default height of base: 300 mm)
• If there is more than 100 mm of snow on top of the chiller, always operate the unit after cleaning the snow.
• Do not install the product where there could be negative impact from snow in areas with heavy
snowfall. Decide the installation direction of the chiller so that the side of the air heat exchanger
does not face the direction of the snow.
(Make the side of the air heat exchanger parallel to the direction of the snowfall.) Install a blocker with the height of the snow accumulation to avoid the snow around the chiller from being
sucked into the coil side.
(Prepare on site)
• If the wind comes in one direction of the unit where the seasonal wind is strong, there is a high
chance that it can lead to issue with product capacity or imbalance of load. Therefore install the
product so that it has consistent effect on the product cycle. If that is not possible, consider
using a wind blocker or other devices. In areas with strong seasonal wind during the winter,
apply the wind blocker hood, especially near the coastal area, without blocking the suction inlet
of the chiller considering the direction of the wind. If the chiller is directly exposed to the seasonal wind during the winter, separately install a wind buffle. (Prepare on site)
INSTALLATION 65
ENGLISH
Details to consider when installing on the coast
! CAUTION
• When installing the chiller near the coast, make sure that it is not directly exposed to the
coastal wind.
• When installing the chiller directly exposed to the coastal wind, separate anti-corrosive
treatment must be done on the condenser of the chiller.
* Selecting location of chiller
Install the chiller where the building can block the coastal wind.
Coastal wind
Coastal wind
If the product has to be installed inevitably facing the coast, install a wall around the outdoor unit.
Wall
Coastal wind
Install the product where the drainage is smooth.
The wall must be made of sufficiently strong
material such as concrete to block the coastal
wind and must be 1.5 times larger than the
size of the product to protect the product
1 000 mm apart. There must be 1 000 mm of
clearance between the wall and the chiller for
smooth circulation of air.
66 INSTALLATION
When installing the product, secure minimum space as shown below considering the service,
suction and discharge of air flow.
* Consider the ventilation condition.
The air cooled chiller must be installed on open space or must have appropriate ventilation.
When installed along the wall, there must be sufficient space for ventilation.
Air
(Unit: mm)
Wall
h1
800
800+h1/2
Reference
If the side of the chiller is near the wall and the height of the wall is less than 800 mm, the
distance between the wall and the chiller must be at least 800 mm. If the side of the chiller is
near the wall and the wall is 800 mm or higher, space of half of h1 must additionally be
secured on top of the 800 mm for the distance between the wall and the chiller.
(Unit: mm)
Ceiling
Air
5,000
ENGLISH
Basic installation space
Wall
800
Reference
If there is a ceiling on the top part of the chiller, the distance from the chiller to the ceiling
must be 5 000 mm or above.
If the front or rear side of the chiller is close to the wall, the distance from the wall to the
chiller must be 800 mm or above.
INSTALLATION 67
ENGLISH
Consider the service space.
There must be sufficient space for maintenance and repair work around the chiller.
Because this is the space where the
water pipes are installed, make sure
to secure sufficient space for future
maintenance and repair work.
Service space
800 mm
800 mm
800 mm
600 mm
Because this is the space where the
water pipes are installed, make sure
to secure sufficient space for future
maintenance and repair work.
Service space
800 mm
800 mm
800 mm
68 INSTALLATION
• The base must be able to withstand concentrated load.
• The base must be installed with maximum gradient of 1/300.
• The height of the base must be higher than the surface of the water and drain holes must be
installed around.
• Set the height of the base according to the installation environment so that the product is not
submersed in water. The default height of the base is 200 mm and it must be at least doubled
in areas with double the snowfall of 100 mm or above.
• Install the drain pipe in the drain hole.
The drainage must be finished so that particles around the drainage do not clog the pipes.
• LG is not responsible for product failure or damage from incorrectly designed or manufactured
base.
! CAUTION
• For the frame, use strong material such as steel angle so that it does not slip from the wind
or snow.
• Never install the product so that the suction inlet and the discharge output of the chiller
faces the seasonal wind.
• When making the base platform, pay special attention to the strength of support, drainage
and direction of pipe and wiring.
* Location of anchor bolt
F
D
C
273.5
50
A
B
E
50
87
Classification
20 RT
40 RT
60 RT
A
865
1 628
2 391
B
765
1 528
2 291
C
2 254
2 254
2 254
D
2 154
2 154
2 154
E
691
1 456
2 217
F
1 707
1 707
1 707
A
100
ENGLISH
Details to consider when installing the base
150
465
Apply 3/1000 of slope
<20RT Drawing of base>
Drain
hole
INSTALLATION 69
F
D
C
F
D
C
273.5
50
A
B
E
50
87
273.5
50
ENGLISH
A
B
E
50
85
A
100
100
A
150
465
Apply 3/1000 of slope
150
465
Apply 3/1000 of slope
Drain
hole
Drain
hole
<40RT Drawing of base>
<60RT Drawing of base>
70 INSTALLATION
ENGLISH
Transportation method and precaution
! CAUTION
Be very careful when transporting the product.
• When transporting the product, use the forklift or spreader bar and follow the directions in
the manual.
• Do not touch the heat exchanger pin with bear hands. It is very sharp and can cause an
injury.
• Cut and dispose the plastic (vinyl) bag used for packaging so that children do not play with
the bags. If not, it can cause suffocation when put over the head.
• Always transport the chiller by supporting 4 points. 3 point support is unstable and the product may fall over.
• When transporting the product with the forklift, be careful not to drop the product.
• Use a long belt at least 8 m long.
Precaution when moving the forklift
• Level the chiller as much as possible while moving it.
• When moving the chiller using the forklift, check the weight and use the forklift with the sufficient capacity to handle the weight.
• When moving the chiller using the forklift, check the transportation groove at the bottom of the
chiller and use the fork that fits the grooves.
• The forklift cannot lift the product from front or rear side. Always lift the product up from the
side where the grooves are to move the product.
* The side with the control box is the front side.
INSTALLATION 71
• When moving the chiller, make sure to level the product as much as possible.
• When hanging the chiller, pass the rope through the two supports located at the bottom of the
front and rear side.
• Always connect the rope to the 4 supports when lifting up the product so that the impact may
not be applied.
• Use the steel spreader bar to use the tension of the ropes to avoid the damage to the product.
• When hanging the chiller, do not tilt the chiller by more than 15 degrees.
* Spreader bar is the tool to avoid the rope from contacting the product to minimize the damage
to the top and the coil.
• Spreader bar is not supplied.
• Spreader bar must be larger than the size of the chiller.
• Even when the spreader bar is close to the top of the product, it must not contact the product.
Rope
Minimum of
4 572 mm or more
Spreader bar
Forklift groove
Rope support
Storage
If the product must be stored before being installed or used, make sure not to expose the product to dirt and humidity in the construction site. Put a protective cover on the product until it is
ready to be installed.
ENGLISH
Precaution when hanging the product
72 INSTALLATION
ENGLISH
Installing chiller
As soon as the product is delivered, check for any damages. If there are damages, immediately
contact the shipper.
Precaution when installing the chiller
• Secure air flow, wiring, piping and sufficient space for service.
• Check whether the surface is flat and can withstand the operating weight and vibration/noise of
the device.
(For the part to lift up the product, installation and operating weight, refer to the specification,
external diagram and basic diagram. )
• Set the device so that the air flow does not get limited to the suction inlet side only.
• Secure sufficient space to provide service and remove the product.
(The air flow and service space various based on the model. Refer to the drawing in the Appendix.)
• Check the base before installing the product and install the product only when there is no issue.
If there is any issue, contact the contractor to resolve the issue.
(For checkpoints related to the base, check the details when installing the base.)
! WARNING
• Install the product where the weight of the chiller can be sufficiently supported.
If the product is installed at a location that cannot support the weight, the chiller can fall
down to cause an injury.
• Install the chiller so that it does not fall over even from strong wind and earthquake. IF
there is any defect in the installed condition, it can fall over to cause an injury.
Installing anti-vibration pad
• Anti-vibration pad is the part to absorb the vibration that occurs during the product operation
and must be installed before placing the product on the base. Anti-vibration pad is not provided
along with the product and must be supplied on site.
• After installing the anti-vibration pad, loosely tighten the anchor bolts. Tightening the anchor
bolts too tightly will reduce the anti-vibration effect.
INSTALLATION 73
ENGLISH
• Locate the anti-vibration pad shown as below and lay 2 layers of 10 mm or above.
Unit:mm
(765)
(765)
(765)
(765)
(765)
(765)
Anti
-vibration
pad
20 RT
40 RT
60 RT
Installing anchor bolt
! CAUTION
• Wooden frame at the bottom of the base frame must be removed before tightening the
anchor bolts for the chiller.
• When installing the chiller where it is directly affected by the coastal wind, additional anticorrosive treatment must be applied to the condenser.
• Tighten the bolts so that the chiller does not fall over from the earthquake or strong wind as
shown below.
• Depending on the installed condition, the vibration can be transferred to the installed part to
transfer the noise and vibration to the floor or wall. Therefore make sure to use the anti-vibration
material.
• Anti-vibration spring can be additionally installed on top of the anti-vibration pad. Check the external diagram and the weight of the product to set the specification for the anti-vibration spring.
• When combining multiple chillers, make sure to level the height of each chiller so that the water
pipes can be easily connected.
• Use the anchor bolts to firmly fixate the chiller. The anchor bolt must be inserted at least 65 mm.
74 INSTALLATION
ENGLISH
No.
Name
1
Anchor bolt(M16)
2
Nut
3
Spring washer
4
Flat washer
5
Bottom of product
6
Anti-vibration pad
7
Cap
8
Base surface
* Above parts are not included in the product.
Shape of anchor bolt
(Unit : mm)
Specification of anchor bolt
Screw size (d)
L
S
D
L1
Used drill
Drill depth
(mm)
Pull-out
load(N)
5/8” (M16)
125
70
22
65
22
65
42 140
INSTALLATION 75
Areas with heavy snowfall require snow protection plan. For the air cooled scroll cooling only
chiller, the snow protection plan ensures sufficient performance.
Design of snow protection plan
When establishing the snow protection plan, the fan level from the chiller must be at least to
some level.
• If the fan level is below a certain level, it triggers the high pressure limit within the circuit to
cause an issue in the operation.
• Because the outdoor unit can be frozen inside due to the clogged air inlet from snow, make the
arrangement so that the outdoor unit does not directly contact the inlet and install the hood to
avoid the effect of the heavy snow.
• Always install the base so that the chiller can be installed higher than the accumulated snow
and the default eight of the base is 200 mm. If the snowfall is 100 mm or above, raise the base
to more than double the height. (300 mm maximum snowfall)
• The height of the base must not exceed the width of the product.
• If there is 100 mm or more snow piled on top of the product, make sure to clean the snow off
before operating the chiller.
Installation considering the snow protection
• Do not install the chiller near the edges of the rooftop.
(Snow can fall down to the chiller and push off the chiller off the roof. If snow is accumulated
between the building wall and product, it can cause issues with the product. )
• Raise the base higher than the snow accumulation.
(Make sure to secure the path near the heat exchanger of the chiller in case of snow)
• Avoid installing the product where the snow is accumulated.
ENGLISH
Snow protection
76 INSTALLATION
ENGLISH
Water pipe connection
Water pipe construction is a very important part of the design or construction of the cooling system. Any defect in any location of the pipe can disable the applicable unit from performing sufficiently. Perform the design and construction considering the check service.
Water pipe system diagram
Water circulation that has temperature difference of 3 °C - 8 °C between the outlet water temperature of the hot and cold water is required. If the water circulation is insufficient, the product
will not be able to perform properly and will have negative impact on the life of the product, as
well as other issues with the product.
Make sure to secure water circulation in accordance with the specification.
Also even when the water circulation is secured in accordance with the specification, bypass circuit must be installed on the 1st side for the water pipe system of the chiller. Therefore if the
water flow is reduced during low load, it can cause issues such as excessive and frequent operation of compressor and freezing during stopped condition or cooling operation.
Water circulation must maintain constant flow as much as possible.
* For the parts used in the cold water pipe system, make sure to use the parts that comply with
designed water pressure or higher.
Expansion tank
Expansion tank is the device that discharges the expanded water and at the same time, removes
the air within the water pipe circuit.
Set the capacity of the expansion tank to 2-2.5 times of the water expansion amount.
(Generally it is 3-5 % of the entire amount within the water pipe circuit.)
Pipe slope and air vent
If air remains within the pipe, the resistance of the water pipe circuit increases or the circulating
amount of water is reduced significantly. If air remains in the pump during the operation, it can
cause several issues to disable the operation.
Install the air vent valve where there is a chance of air remaining within the entire water pipe circuit and apply 1/200 of slope to the air vent valve side to avoid the air from remaining in the pipe.
Water pipe system diagram
• Connect the pipe so that the entrance of the cold (hot) water pipe is correct.
• Permitted water pressure resistance of cold water pipe system is 1MPa
• To prevent any external heat loss or dew drops forming during the cooling operation on the
water pipe system, apply thermal insulation treatment.
• Install the air vent at the output end of the water pipe. (Air vent)
• If the thermometer is installed on the inlet/outlet of the cold/hot water pipe, the operating condition of the chiller can be checked.
• Always install the strainer (50 Mesh or above) that can be cleaned on the water pipe inlet side
to filter any alien particles from entering the heat exchanger.
• Always install the strainer on the leveled pipe. (If sand, trash or rust gets mixed to the cold
water system, it can cause product failure due to corrosion of metallic parts.)
• Install the on/off valve on the cold water inlet/outlet and bypass pipe on the pipe direction of
the device side.
INSTALLATION 77
Installation mode A (Recommended method)
* Independent product installation
* Independent product installation
T1
T1
P1
T2
P2
P1
T2
P2
LG supplied
LG supplied
Symbol
Description
Symbol
Description
Valve
T1
Temperature sensor (1: Inlet 2: Outlet)
Strainer
P1
Pressure gauge (1: Inlet, 2 Outlet)
Flexible joint
Cold water pump
ENGLISH
- For the pipe system, it is recommended to install the bypass and clean the pipe before
installing the product and during the annual pipe cleaning.
- On/Off valve blocks the old water to the chiller that is not operating to reduce the power of
the pump. Therefore select whether to install to fit the need of the site.
• Install the pressure gauge and thermometer on the inlet and outlet of the water pipe.
• Always install the flexible joint to reduce the vibration of the pipe and product.
- Vibration of water pipe system is absorbed to prevent water leakage.
• For the cold water system part, make sure to use the component that complies with designed
water pressure or above.
• Before supplying cold water to the chiller, clean inside the pipe system to remove any negative
impact of particles to the product.
78 INSTALLATION
* Independent product installation
P2
T1
T2
T2
* Independent product installation
T1
P1
P2
ENGLISH
Installation mode B
P1
LG supplied
LG supplied
Symbol
Description
Symbol
Description
Valve
T1
Temperature sensor (1: Inlet 2: Outlet)
Strainer
P1
Pressure gauge (1: Inlet, 2 Outlet)
Flexible joint
Cold water pump
INSTALLATION 79
ENGLISH
Water pipe connection
! CAUTION
• If the winter outdoor temperature is 0 °C or below, take following measures to prevent the
pipe from freezing as shown below.
- If the outdoor temperature is low, the circulation water can freeze to damage the heat
exchanger of the product when the product is stopped.
If there is possibility of damage from low outdoor temperature, operate the pump to prevent the water from freezing.
- If the product does not operate for a long period of time during the winter season, remove
all the circulation water to prevent the damage of heat exchanger and pipe from freezing.
- Add anti-freeze additive to prevent the circulation water from freezing during the winter
season.
• Maintain the cold water flux within the designed flux to ensure appropriate chiller performance and reduce the tube damage from rusting, scaling and corrosion. LG is not responsible
for any damage of chiller from poor water quality management or inappropriate processing
water.
1 Water pipe installation
- Appropriate pressure of pipe connection is flange connection of 1 MPa or below.
- Size of the water pipe must be the same as that of the product or larger.
- If there is risk of dew drops forming, always install the thermal insulation material on the outlet pipe of the cold water.
- To avoid connected water pipe from creeping from the load, use appropriate hook for support.
- To prevent the pipe connected part from freezing during the winter season, always install
the drain valve at the most bottom of the pipe system.
- Cold water inlet pipe is located at the bottom and the outlet pipe is installed on the top.
- When connecting several chillers, refer to the following for common pipe size.
Full product capacity
20 RT
40 RT
60 RT
80 RT 100 RT 120 RT 140 RT 160 RT 180 RT
Common pipe size
65 A
80 A
100 A
100 A
125 A
●●
●
20 RT
Product
125 A
125 A
150 A
●●
●
●
●●
150 A
●
●
40 RT
●
60 RT
●
●●
●●●
Full product capacity
200 RT
220 RT
240 RT
260 RT
280 RT
300 RT
Common pipe size
150 A
200 A
200 A
200 A
200 A
200 A
40 RT
●●
●
●●
●
60 RT
●●●
●●●
●●●
●●●●
20 RT
Product
●●●●
●●●●●
80 INSTALLATION
ENGLISH
2 Cold water pump control
- If the cold water pump is not operating for a long period of time or if the anti-freeze liquid is
not used as the cold water, the anti-freeze pump control must be installed to prevent the
pipe from freezing.
- The vibration of the pump can transfer to the pipe to cause noise indoors. As the plan to prevent the noise from spreading in the pump, install flexible joints at the inlet/outlet and use
the anti-vibration amount for the pump support.
3 Cold water management
The water quality of the cold (hot) water is described as follows. The water quality must not
fall below the following standard. If so, it can be judged to have risk within relatively short
period of time.
Item
Circulation type cold water
Cold water
6.5 - 8.0
6.5 - 8.0
Conduction rate (25 °C ℃s/cm)
500 or below
200 or below
Alkali level (PPM)
100 or below
50 or below
Hardness (PPM)
100 or below
50 or below
Chlorine ion (PPM)
100 or below
50 or below
Lactic acid ion (PPM)
100 or below
50 or below
Iron (PPM)
0.1 or below
0.3 or below
Sulfur ion (PPM)
Not detected
Not detected
Ammonium ion (PPM)
0.5 or below
0.2 or below
Silica (PPM)
50 or below
30 or below
PH(25 °C)
Reference
Cold water
INSTALLATION 81
ENGLISH
Precaution to prevent freezing
If the product does not run when the outdoor temperature is 0 °C or below during the winter, the
water must be drained or anti-freeze additive must be added to prevent the water from freezing.
Input pipe must be installed to be leveled.
The pipe must be leveled and installed so that water does not remain in the inlet pipe connected
to the product when draining the water through the drain hole.
Inlet water
pipe
Drain
Hole
If the inlet water pipe is installed in trap structure without being leveled, the water will remain in
the inlet water pipe even when the pipe is drained and the inlet water pipe or the part within the
chiller can be damaged from freezing. Therefore add a drain hole at the bottom of the pipe as
shown below.
Inlet water
pipe
Drain
Hole
Inlet water pipe
Drain Hole
82 INSTALLATION
ENGLISH
Electric specification
ACHH
Frequency(Hz)
Voltage(V)
Voltage range
MCA(A)
MOP(A)
020LBAA
50
380-415
342~457
65
90
040LBAA
50
380-415
342~457
123
150
060LBAA
50
380-415
342~457
181
200
1 Voltage range
The chiller must be operated at the voltage within the upper and lower limit supplied from the
power terminal to operate normally.
2 Maximum voltage variance permitted between phases is 2 %.
3 MCA is the criteria of selecting the wiring standard.
4 MOP is used when blocking the circuit overload.
!
NOTE
MCA: Minimum Circuit Ampere, A
MOP: Maximum Overcurent Protection
! WARNING
• Always use regulated wire so that the connector of the terminal does not fall off from
external force. If the connector is not fixed firmly, it can cause heating, resulting in a fire.
• Always use appropriate over-current protection switch. Generated over-current includes
low level of DC.
• Leakage current circuit breaker for grounding must be installed. If not installed, it can
cause electric shock.
• Use only the circuit breaker and fuse of accurate capacity. Using fuse, wire or copper
wire with excessive capacity can cause malfunction or a fire.
• Do not connect the 3 phase 3 wire type connection in reverse/missed phase.
INSTALLATION 83
Precaution
1 For regulation related to electric device and wire, follow the regulation of the technical standard and government organization and the guide of the power company.
! WARNING
Electric work using special circuit based on the overall regulation and this manual must be
done by qualified electrician.
If the capacity of the power supply circuit is insufficient or if there is a defect, it can cause
electric shock or fire.
2 Power and communication cable can only be connected from one direction.
When viewed from the front, there is a connecting groove on the right side.
Remove the wire cover for conduit works
3 Separately install the communication and power cable of the chiller so that the communication cable is not affected by the electric noise generated from the power cable. (Do not pass
through the same electric pipe)
4 Always ground the wires as indicated.
! WARNING
Always ground the chiller. Do not connect the grounding wire to the gas pipe, water pipe,
lightning rod or telephone grounding wire. If the grounding is unstable, it can cause electric
shock.
5 Use 2-line shield cable as the communication cable. If 1 line shield cable is connected to
another system, the communication quality of receiving and sending will be poor causing
issues.
ENGLISH
Electric work
84 INSTALLATION
ENGLISH
! WARNING
• When connecting the power cable, always connect after connecting the ring terminal. It
can cause fire and burn the electric part.
• The voltage imbalance rate between phases must not be higher than 5 %. If higher than
5 %, the product life may be shortened.
• Use 2 line shield cable
• Do not wire in parallel to the power cable.
• Do not use multiple lines.
6 For the communication terminal, use only the regulated communication cable.
Electric connection
! WARNING
Electric shock may result in injury or death. The power must be completely turned off while
installing the product.
Because there may be more than 1 switch, attach the warning label to all locations with the
switch so that the power is not recovered until the work is fully completed.
1 Power
The electric characteristics of the power must be aligned with plate of the device. Supplied
voltage must be within labeled limit.
2 Power cable connection and wiring.
Refer to the wiring diagram to connect the power cable.
For the power cable, distinguish R,S and T to connect to the MAIN terminal block.
All power wiring must comply with the regulation of the applicable area and nation. Refer to
the wiring diagram and electric specification.
Do not turn off the power unless the chiller is not used for a long period of time.
If power is not connected to the oil heater on the bottom of the compressor, the chiller may
be damaged or the system may stop.
3 Control power
When using the power, control power is supplied from the main power and separate power
supply is not required.
4 Additional wiring
Refer to the wiring diagram for on-site wiring. On-site wiring is only required for main power
panel. Control box is already fully wired out of the box.
* On-site wiring location
- Pump output : 1A, 1B
- Modbus : 2A, 2B
- Pump interlock: 6A, 6B
- Remote alarm: 7A, 7B
- HMI power: 8A, 8B
(When installing outdoor, use separate power cable for indoor installation)
- Remote operation: 9A, 9B
- HMI communication: 11A, 11B
INSTALLATION 85
Maximum of 5 chillers can be connected.
When installing the power cable, jump one power cable and do not connect to other chiller.
Always distinguish chiller for installation.
When installing several chillers, install the circuit breaker by each chiller.
Refer to the general data of the product information when selecting the capacity for the circuit
breaker.
Correct installation
Circuit breaker
Circuit breaker
Circuit breaker
Main Power Supply
Incorrect installation
Circuit breaker
Main Power Supply
ENGLISH
5 Circuit breaker and power cable connection
86 INSTALLATION
ENGLISH
How to set control box address (Set cycle PCB address)
Address setting
dip switch
#6 and #7
Cycle PCB address
check display
Reset button
1 Select the address by turning the dip switch #5, #6 and #7 on the top right corner of PCB
ON/OFF.
* If there is only 1 cycle PCB connected to the main controller of the chiller, use the address
#1 only and if there are 2 cycle PCBs, use only #1 and #2 to select the address.
Cycle address: 1
(Dip switch: #6, #7 OFF)
Cycle address: 2
(Dip switch: #6 ON / #7 OFF)
Cycle address: 3
(Dip switch: #7 ON / #6 OFF)
SW01B
SW01B
SW01B
INSTALLATION 87
plete the setting.
! WARNING
• If there is only 1 cycle PCB connected to the main controller of the chiller, use the
address #1 only and if there are 2 cycle PCBs, use only #1 and #2 to select the address.
Or else the product will not operate.
• When replacing the cycle PCB of the control box, always run an automatic address setting again.
This must be performed with all cycle PCB and HMI PCB connected. If not, it will result in
operation error.
• When setting the address, check and change other control box PCB address within the
chiller. PCB address for replacement is set to 1. If control box PCB address is duplicated,
the product will not operate.
Control box PCB address is set to 1, 2 and 3 in order as factory default.
ENGLISH
2 After selecting the cycle address with the dip switch, always press the Reset button to com-
88 INSTALLATION
ENGLISH
Provide running & alarm status (with External Auto Control)
Chiller PCB provide 2 digital output, one is running status of unit ,the other is alarm status of unit.
Two digital output are non-voltage signal.
Connection of between Chiller PCB and auto control is as below.
1 Alarm Status Signal
When alarm of unit is occur, signal of alarm status is short, otherwise is open.
2 Running Status Signal
When unit is running signal of running status is short, otherwise is open.
Auto Controller (PLC or DDC)
& Auto Control Panel
ྙ Alarm Status
(Non-Voltage Signal)
ྙ
ྚ
ྚ Running Status
(Non-Voltage Signal)
: Field wiring
INSTALLATION 89
! CAUTION
• HMI is designed to basically be installed and used on the wall.
• This example describes how to install HMI on the wall.
• If the wall is firm, prior work is required to drill the screws.
• Communication cable for indoor installation is not included in the components.
• It is recommended to use communication cable of 0.75 square or above.
Decide the space to install HMI. Before fixating the HMI, check whether it is an appropriate location to connect the communication cable and power cable to HMI.
Use the drier and M4 screw on the top wall of the communication cable to fixate the rear panel
of HMI. It can be fixated as shown below depending on the installed location.
Pull out the communication cable through the hole on the rear side of the panel.
[Reference for wiring on
control box terminal side]
(BUS-A) (BUS-B)
ENGLISH
How to install HMI indoors
90 INSTALLATION
ENGLISH
! CAUTION
• Because different polarities exist on the communication cable, make sure not to mix them.
• To prevent incorrect wiring, it is recommended to mark A and B on the communication cable.
• Use the ring or Y terminal for connecting to the control box terminal of the communication cable.
• Refer to page 16 “Internal configuration of control panel” for location of control box terminal.
Connect the socket to the communication port located on the rear side of the HMI.
E#D
Connect the power adapter (Component) to the power terminal located on the rear side of the
HMI.
Assemble the main unit of HMI to the rear panel installed on the wall. After hanging the hole of
the top of the main unit to the top of the rear panel, push the bottom of the unit to assemble it.
Connect the power cord of the power adapter to the power plug.
! CAUTION
If the power cord of power adapter and power cord must be buried due to short distance, it
requires space of 120 mm x 80 mm x 80 mm to arrange the power adapter and power cord.
TEST RUN/ADDITIONAL FUNCTION 91
Test run
Checkpoint before test run
Start the chiller after checking the following.
- Before starting the chiller, check the supplementary devices such as cold water circulation
pump, AHU or other devices. Refer to the directions from the manufacturer. If all equipped
parts are installed on the device, check whether all parts are installed appropriately and accurately and check whether the wiring is done correctly. Refer to the wiring diagram of the product.
- Check the flow switch for appropriate operation of the product. Check whether the sensor is
operating properly.
- For cooling, fill up cold water circuit with clean water or other non-corrosive liquid and purge the
air so that there is no air remaining inside the cold water circuit. If the outdoor temperature is
expected to drop below 0°C, add anti-freeze additive to the cold water circuit to prevent the
water from freezing. Cold water circuit must be cleaned before connecting to the product.
- Check and inspect all water pipes. Check whether the direction of the water flowing is correct
and whether properly connected to the evaporator. Open all flow valves to the evaporator side.
- Turn on the cold water pump and measure the overall water pressure reduction of evaporator to
check whether the flow is accurate compared to the designed flow rate.
- Check all electric connections within the control panel and whether all parts are tightly assembled with good contact conditions. Though the connecting part is checked from the factory but
it can be loosened during the transportation from the vibration.
- Check and inspect all fuses. All fuses within the power panel and control panel must be
installed at appropriate location.
Starting procedure
The chiller can be started as follows.
- Check whether the load is operating on the air processing device or other device on the side of
the water that supplies the water to the chiller. If the temperature of the cold water is too high,
the start of the load device on the water side can be delayed.
- If auto control does not work from the chiller, check whether the water circulation pump is operating.
- Voltage variance must be within 10 % and check that the phase voltage imbalance does not
exceed 5 % between phases. Check whether the power and capacity is appropriate for processing the load.
- Check the order of the power phase.
- Check and inspect the voltage monitoring meter within the power panel. The meter should not
show any error code.
- Use the HMI device to check the cold water outlet temperature and cooling water output temperature setting.
- Set the start menu of HMI device to start the system. Water circulation flow must be within the
permitted range to control the temperature appropriately.
ENGLISH
TEST RUN/ADDITIONAL FUNCTION
92 TEST RUN/ADDITIONAL FUNCTION
ENGLISH
Check during start
After the above procedure, start the chiller to check whether everything works normally.
If there is any issue, immediately stop the product and follow the “Troubleshooting” process.
Refer to the Appendix for the criteria of each detail.
Follow the below procedure for checkpoints when starting the chiller.
- Check the rotating direction of the condenser fan motor. Place newspaper or tissue to check
whether the air flow is normal around the motor.
- Check whether the cold water outlet temperature is the same as the setting.
- Through HMI device, check whether all sensors show effective values. Temperature sensor
detects the compressor discharge temperature, compressor suction temperature, condenser
outlet temperature and cold water inlet/outlet temperature.
- Check whether the operating current, operating noise and vibration is the same as the product
specification.
Stop
After completing to check based on the above procedure, stop the product.
After the above procedure, start the chiller to check whether everything works normally.
If there is any issue, immediately stop the product and follow the “Troubleshooting” process.
Refer to the Appendix for the criteria of each detail.
Follow the below procedure for checkpoints when stopping the chiller.
- Press the stop button from HMI.
- Measure the stopping time of the actual product after pressing the stop button.
- Stop the cold water pump.
Load operation and operation adjustment
After starting and stopping the product, check the product function by operating the load and
adjusting the operation.
Adjust the cold water outlet temperature setting to adjust the load to check the product while
changing the operating condition.
Prepare operation data
Always record the operating condition when operating the chiller to check whether it is operating
normally compared to the specification.
Refer to ‘the standard operation record’ page of Appendix.
Analyze water quality of cold water
Analyze the water quality during the test run and secure the data.
Compare the water quality analysis result after a certain period of time (monthly check is recommended) against that of test run to decide the period to change the water.
TEST RUN/ADDITIONAL FUNCTION 93
ENGLISH
Additional function
Dip switch setting
The dip switch setting of the control box for additional function is as shown below.
Change the dip switch setting of individual cycle control box PCB to select the functions in the
following table.
1 Cycle Main PCB Dip S/W #5 ON
2 Press SW01D button 1 time(5 Sec).
3 Press SW02C button 2 times.
4 Press SW01D button 1 time.
5 Press SW02C button 3 times.
Func
ë˜
6 Press SW01D button 1 time(5 Sec).
7 Press SW02C button to select the
compressor.
Fn1
Fn2
Fn3
Fn4
Fn5
Fn6
Fn7
Fn8
Fn9
Fdd
Suc
Idu
ë˜
ë˜
ë˜
Fd1
Fd2
Fd3
Fd4
Fd5
Fd6
Se1
Se2
Se3
Se4
Se5
Se6
Se7
Se8
Se9
Id1
Id2
Id3
Id4
8 Press SW01D button 1 time(5 Sec).
! CAUTION
• If the applicable dip switch is not set correctly, the product may not operate correctly.
94 TEST RUN/ADDITIONAL FUNCTION
ENGLISH
Night low noise function
This function judges the hottest day time during the cooling operation to reduce the fan noise of
the outdoor unit at night time with low cooling load by running the outdoor unit fan at low RPM.
* How to set maximum RPM
Cycle Main PCB Dip S/W No. 5 ON
Press the SW01D button until the Func is
displayed.
Continue to press the SW01C button until
the Fn3 is displayed + press SW01D button
1 time to set the step.
When Fn3 is on, press the SW10C or
SW02C button until the applicable step is
displayed.
① STEP 1-3Maximum RPM = 820
② STEP 4-6Maximum RPM = 750
③ STEP 7-8Maximum RPM = 720
※ Refer to right table for standby time/operating time
by step
Start night low noise function
(When setting step 1)
After maximum chiller temperature is detected, it operates at 820 (Set) RPM after 8
hours (Standby time)
Stop night low noise function
(When setting step 1)
After running night low noise function, it is
automatically canceled after 9 hours
(Operation time)
* RPM/Time setting
Step
1
2
3
4
5
6
7
8
9
①
820
②
750
③
720
10
11
12
Maximum
fan RPM
-
Standby Operation
time (Hr) time (Hr)
8
6.5
5
8
6.5
5
8
6.5
5
820
0
750
0
720
0
! CAUTION
• Reset the main board of the cycle control box before running this function.
• Request the function setting to the installation expert after installing the chiller.
• If the function is not used, turn the dip switch OFF and reset the power.
• If chiller RPM is changed, the cooling capacity may be reduced.
9
10.5
12
9
10.5
12
9
10.5
12
Continuous
operation
Continuous
operation
Continuous
operation
TEST RUN/ADDITIONAL FUNCTION 95
Self diagnosis function
This function self diagnose the product and displays the error type.
Error is displayed in the popup window as shown below in HMI and if the error is resolved, press
the “Reset” button on HMI to close the error window.
HMI Communication Error
OK
- OK button
This is the button to close the alarm popup window.
Alarm popup window is closed for user convenience from the screen but the current alarm status is maintained.
- Error code
Error code is configured as follows.
CH x
x
xxx
This displays the alarm code
This displays the alarm cycle number. (0-3)
0: Common alarm
1: Alarm of cycle 1
2: Alarm of cycle 2
3: Alarm of cycle 3
This displays the unit number and current product
is fixed to 1.
ENGLISH
SELF DIAGNOSIS FUNCTION
96 TEST RUN/ADDITIONAL FUNCTION
ENGLISH
Process alarm (error)
- Common alarm (error)
CH10XXX error basically stops the product
- Alarm (Error) by cycle
When the alarm occurs by cycle, applicable cycle is maintained at stopped condition and normal
cycles operate normally.
If the alarm from the cycle is canceled, it resumes normal operation.
! CAUTION
When composed of 3 cycles, overall product condition maintains the operating condition even
when 2 cycles are in error condition, and the overall product will stop only when all 3 cycles are in
error condition.
HEAT SOURCE WATER MANAGEMENT 97
ENGLISH
HEAT SOURCE WATER MANAGEMENT
Heat source water management
- Maintain the supplied heat source water temperature in the boundary of 10 °C ~ 45 °C.
Otherwise, it may cause product failure.
- The flow speed of the supplied heat source water shall be adjusted adequately.
Otherwise, it may cause abnormal noise, pipe vibration, or pipe contraction or expansion by
temperature. Use the heat source water pipe with the size of the same diameter of the product
connection or bigger.
- Refer to the following table for the heat source water pipe gauge and flow speed.
As the flow speed is faster, the noise, corrosion, and inflow of air bubbles increase.
Diameter (mm)
< 50
50 - 100
100 <
Speed Boundary (m/s)
0.6 – 1.2
1.2 – 2.1
2.1 – 2.7
- Caution is required for water quality management. Otherwise, it may cause heat source water pipe
corrosion and product failure.
- If the water temperature is 40 °C or higher, corrosion may occur, so it is better to add anti-corrosion
solution.
- Install the pipe, valve, gauge, and sensor where the maintenance is easy. Install the heat source
water pipe valve at a low position for draining when it is necessary.
- Be careful not to have inflow of air. Air makes the flow speed unstable during the circulation of the
heat source water and may degrade pump efficiency and generate heat source water pipe vibration.
Therefore, install air purge at appropriate places where air generations are expected.
- Use the following methods to prevent freezing. Otherwise, there is a risk of freezing in the winter.
* When the temperature drops, before the freezing, circulate the water with pump.
* Operate boiler to maintain room temperature.
* If it is not operated for a long period of time in the winter, drain the cooling tower water.
* Use freezing prevention solution.
* Refer to the following table for minimum addition amount of freezing prevention solution for each
freezing temperature.
Types of freezing
prevention solution
Ethylene glycol (%)
Propylene glycol (%)
Methanol (%)
0
0
0
0
Minimum temperature (°C) to prevent freezing
-5
-10
-15
-20
12
20
30
17
25
33
6
12
16
24
-25
30
* If freezing prevention solution is added, it may cause increased heat source water system pressure
drop or product performance degradation.
! CAUTION
• Sealed type cooling tower is recommended.
- If open type cooling tower is applied, use middle heat exchanger to make the heat source
water supply system to be sealed type.
- If middle heat exchanger is not used and open type cooling tower is directly connected to the
product, product may be severely damaged by foreign object, etc., and in such case, free repair
will not be possible.
98 HEAT SOURCE WATER MANAGEMENT
ENGLISH
Heat source water quality management standard table
Water with a lot of foreign object causes corrosion or scale generation in the condenser and pipe
and may affect the performance and lifespan.
Use heat source water suitable for [Environment Policy Basic Act Enforcement Ordinance Environment Standard].
If water other than tab water is used in the cooling tower water supply, make sure to have water
quality inspection.
- Heat source water quality management shall follow the standard table below.
If heat source water is not managed according to the water quality standard table, it may cause
air conditioner performance degradation or severe product problem.
Category
Sealed type system
Heat source water Supplementary water
Influence
Corrosion
Scale
Basic category
pH [25 °C]
7.0℃8.0
7.0~8.0
O
O
Electrical conductivity [25 °C](mS/m)
30 or less
30 or less
O
O
Chloride ion(mg CI- /l)
50 or less
50 or less
O
-
Sulfate ion(mg SO4²-/l)
50 or less
50 or less
O
-
Acid consumption [pH 4.8] (mg CaCO3/l)
50 or less
50 or less
-
O
Total hardness (mg CaCO3/l)
70 or less
70 or less
-
O
Calcium hardness (mg CaCO3/l)
50 or less
50 or less
-
O
Ion-silica (mg SiO2/l)
30 or less
30 or less
-
O
Reference category
Iron (mg Fe/l)
1.0 or less
0.3 or less
O
O
Copper (mg Cu/l)
1.0 or less
0.1 or less
O
-
Sulfate ion(mg S²/l)
Shall not be detected Shall not be detected
Ammonium ion(mg NH+4/l)
0.3 or less
0.1 or less
O
-
O
-
Remaining chlorine (mg Cl/l)
0.25 or less
0.3 or less
O
-
Free carbon dioxide (mg CO2/l)
0.4 or less
4.0 or less
O
-
Stability index
-
-
O
O
[Reference]
(1) O mark in the corrosion and scale field means the possibility of generation.
(2) If the water temp. is 40 °C or higher, the iron without protective coating may have corrosion
when it is exposed to water, and addition of anti-corrosion solution or air purge may have a
good effect.
(3) In the sealed type circuit using sealed type cooling tower, coolant and supplementary
water shall satisfy the water quality standard of the sealed type system in the table.
(4) You shall supply tab water, industrial water, or underground water, excluding purified water,
neutral water, and soft water, for supplementary water and supplied water.
(5) The 15 categories in the table are the general causes of corrosion and scale generation
HEAT SOURCE WATER MANAGEMENT 99
For the protection of the water cooling type product, make sure to install strainer of 50 Mesh or
more in the heat source water side pipe.
Otherwise, heat exchanger may be damaged by the following conditions.
1 The heat source water side in the plate type heat exchanger is formed by several small flow
paths.
2 If strainer of 50 Mesh or more is not used, foreign object may block some flow paths.
3 As a result of the heat exchanger damage by freeze burst, the refrigerant is mixed with the
heat source water and the product becomes unusable.
Foreign object
penetration
Heat source
water side
Partial freezing in
progress
Refrigerant
side
Damage by freeze
and burst
ENGLISH
Water pipe side strainer
100 HEAT SOURCE WATER MANAGEMENT
ENGLISH
Actions for problems in the test operation
Category
Whether
heat
source
water is
supplied
Status
Cause
It is the error detected with
regards to the heat source
water during the flow
switch connection, and heat
CH 13
source water does not flow,
or flow amount is insufficient.
(All operation conditions)
Inspection and Action
Check if heat source water supply pump works.
Check blocking of the heat source water pipe. (Strainer
cleaning, valve locked, valve problem,
air in the pipe, etc.)
Check flow switch problem. (Flow switch disorder,
unauthorized handling, disconnection, etc.)
Check if heat source water supply pump works
Heat source water does not
Check blocking of the heat source water pipe. (Strainer
CH 180 flow, or flow amount is
cleaning, valve locked, valve problem,
insufficient.
air in the pipe, etc.)
Plate type heat exchanger maintenance
As scale generation is accumulated, plate type heat exchanger efficiency may be decreased or damage
may occur by freeze and burst with decreased flow amount.
For such reasons, it is necessary to have periodical management to prevent scale generation.
1 Before entering the usage season, check the following items. (Period: 1 time per year)
1) Perform water quality inspection to see if it is within the standard condition.
2) Perform strainer cleaning.
3) Check if the flow amount is adequate.
4) Check if operation environment is adequate. (Pressure, flow amount, water outlet temperature, etc.)
2 To clean the plate type heat exchanger, follow the procedures below. (Period: 1 time per year)
1) Check if service port is mounted on the water pipe for chemical solvent cleaning.
5% diluted formic acid, citric acid, oxalic acid(water acid), acetic acid, phosphoric acid, etc. are suitable as the chemical solvent for scale cleaning. (* Hydrochloric acid, sulfuric acid, nitric acid, etc.
have corrosive property, so they may never be used.)
2) During the cleaning, make sure if water inlet and outlet pipe gate valve and drain pipe valve are
properly locked.
3) Connect the pipe for chemical solvent cleaning through water pipe service plug, fill the cleaning solvent of about 50 °C ~ 60 °C in the plate type heat exchanger, and circulate with pump for about 2 ~
5 hours. The circulation time may be different according to the cleaning solvent temperature or
amount of scale. Therefore, closely observe the chemical solvent color changes to decide the circulation time for scale removal.
4) After the solvent circulation work, completely drain the chemical solvent in the plate type heat
exchanger, fill 1~2 % concentration sodium hydroxide (NaOH) or hydrocarbon sodium (NaHCO3) and
circulate for about, 15~20 min. to neutralize the heat exchanger.
5) After the neutralization work is completed, clean inside the plate type heat exchanger with clean
water. By measuring the pH concentration of the water, you
can verify if the chemical solvent is properly removed.
6) If you use other type of chemical solvent in the market, make sure to check if there is any corrosive
property against stainless or copper in advance.
7) Receive consultation from the experts in the relevant industry for details of cleaning chemical solvent.
HEAT SOURCE WATER MANAGEMENT 101
Gate valve (locked)
Gate valve (locked)
Hose
Service plug
Filtering
net
Chiller
Strainer
Drain valve (locked)
Pump
[Plate type heat exchanger cleaning]
Daily inspection management
1 Water quality management
Plate type heat exchanger does not have the structure for disassembly, cleaning, or parts replacement.
To prevent corrosion or scale accumulation in the plate type heat exchanger, you have to take a special
caution for water quality management. Water quality shall satisfy the minimum suggested water quality category standard. If corrosion prevention solution or corrosion restraining solution is added, you
have to use ingredients with no corrosive property against stainless and copper. To prevent the contamination of the circulation water by external air, it is recommended to periodically drain the water
inside the water pipe and fill water again even if the circulation water is not contaminated.
2 Flow amount management
If the flow amount is insufficient, freeze and burst may occur in the plate type heat exchanger.
Check if strainer is blocked or filled with air, and check whether flow amount is insufficient by checking the difference of temperature or pressure between the outdoor unit inlet and outlet water pipe. If
there is a difference of temperature or pressure above appropriate level, it shows that the flow amount
is decreased, so immediately stop the operation and remove the cause before the re-operation. (* If
there is an air, make sure to perform purge work. The air inside water pipe hinders the heat source
water circulation to cause flow amount insufficiency, and it may also cause freeze and burst.)
3 Brine concentration management
If Brine(antifreeze) is used in the heat source water, use the designated type and concentration.
Calcium chloride Brine causes corrosion of the plate type heat exchanger, so it may not be used.
If the antifreeze is left alone, it absorbs moisture from the air and the concentration will decrease and
may lead to freeze and burst of the plate type heat exchanger, so minimize the contact area with air
and periodically measure the concentration of Brine, and maintain the concentration of Brine by adding
Brine as necessary.
ENGLISH
3 After cleaning work is completed, operate the product to see if it works properly once again.
102 HEAT SOURCE WATER MANAGEMENT
ENGLISH
Inspection
category
Period
(year)
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Product operation status
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Heat exchanger cleaning
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Strainer cleaning
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Water quality inspection
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Refrigerant leakage inspection
●
●
! CAUTION
• The above inspection table sets the minimum period, and more frequent inspections are necessary according to installation environment, operation condition / water quality condition.
• During the heat exchanger cleaning, you have to take off the parts such as pressure gauge or
lock the valve so that chemical solvent may not enter.
• During the cleaning, check the pipe connection parts in advance to prevent leakage of the chemical solvent.
• Start the cleaning work after the chemical solvent and water are sufficiently mixed.
• It is better to perform the heat exchanger cleaning work in the early stage, and when the scale
accumulation becomes severe, it becomes difficult to remove them.
• In the region with poor water quality, periodical cleaning works are necessary.
• Chemical solvent has strong acidic property, so it shall be completely washed with water.
• To verify if the inside became clean, remove the hose and check inside the pipe.
• Make sure to perform the air purge to remove air inside water pipe.
• After the inspection, make sure to check if the heat source water properly flows before restarting the product.
TROUBLESHOOTING 103
ENGLISH
TROUBLESHOOTING
General error
! CAUTION
If the product stopped from the safety device, identify and resolve the root cause before
restarting.
Before introducing the special warning, this introduces the general issues and how to troubleshoot the issues.
When the chiller is not operating, check the power, refrigerant, configuration and alarm setting of
the chiller.
Check the voltage connected to the terminal block inside the power panel to check the power.
If there is no power, check whether the power circuit breaker is down.
If the power is properly connected, check the cycle pressure of the chiller to check whether it is
within the normal range.
If the pressure exceeds the normal range, check for leakage by using the soap bubble.
Before starting the chiller, return to the default setting.
Lastly check the alarm setting. Alarm can be checked through the HMI device.
If the alarm is turned on, follow the troubleshooting method for specific alarm.
Symptom
Potential cause
Potential solution
Check power of the device
Check over-current protection device
Check if fuse is disconnected
Resume power to device
Incorrect or inaccurate device
configuration
Check device configuration
Check if wiring is incorrect
Alarm is on
Check alarm condition
Check for separate alarm troubleshooting
process and resolve the issue
Follow the direction
Check the HMI input channel to check the
alarm condition input
Entering delay time
Check whether compressor entered start delay
time
Device does
not start.
104 TROUBLESHOOTING
ENGLISH
Symptom
Evaporation
pressure is
low and the
product constantly stops.
Condensation
pressure is
high and the
product constantly stops.
Potential cause
Potential solution
Insufficient refrigerant
Check for leakage and refill refrigerant
Insufficient cold water
Check cold water system (Ensure rated flow)
- Is the valve of cold water system closed?
- Is the pressure difference between inlet and
outlet of cold water system appropriate?
- Is the air of cold water system cold?
Outdoor temperature is high
Check whether outdoor temperature is within
operating range
Alien particles accumulated
on the condenser
Clean condenser
Fan defect
Replace fan
Fan-motor connecting bolt is
loose
Check assembly condition and tighten bolt
Motor-mount motor assembly
Check assembly condition and tighten bolt
is loose
Product
vibrates loudly.
Fan is not balanced
After checking fan rotation range, replace fan
Compressor assembly bolt is
loose
If the assembly bolt/nut is loose, tighten it.
Frame assembly bolt is loose
Check assembly condition and tighten bolt
Motor bearing is burnt
Check for abnormal noise in motor (Noise in
multiple of RPM) and replace motor
Rubber fixed condition of
motor mount is defective
Replace motor mount
Pipe vibration defect around
compressor
Replace anti-vibration rubber attached on pipe
Defect in heat emitting fan in
control box
Clean part around heat emitting fan
Constantly
hunting for
cold water
temperature
Insufficient cold water
Check cold water system (Ensure rated flow)
- Is the valve of cold water system closed?
- Is the pressure difference between inlet and
outlet of cold water system appropriate?
- Is the air of cold water system cold?
- Is the cooling load within appropriate range?
Evaporation
pressure is
high
Temporary rise in cold water
temperature due to abnormal
increase in load
It is not abnormal.
But, check if it is within operating range.
Resonance
sound
High frequency wave
noise from
front side of
product
TROUBLESHOOTING 105
ENGLISH
Alarm
The description of the alarm is as follows.
Error name
Error code
Error condition
Control during error
Cancel condition
Outdoor temperature sensor error
CHxx001
Outdoor temperature sensor is open/short
Stop product
Automatically return to normal condition
Common load inlet water temperature sensor error
CHxx002
Common load inlet water temperature sensor is open/short
Stop product
Automatically return to normal condition
HMI communication error
CHxx003
When communication between HMI and chiller controller is disconnected for
more than 30 seconds
Stop product
Automatically return to normal condition
Cycle control box communication error
CHxx005
When communication between chiller controller and cycle control box is disconnected for more than 30 seconds
Stop product
Automatically return to normal condition
Common load outlet water temperature sensor error
CHxx006
Common load outlet water temperature sensor is open/short
Stop product
Automatically return to normal condition
Remote communication error
CHxx009
When the modbus communication with the external device is not established
for more than 30 seconds after the initial communication with the remote
modbus condition is established
Stop product
Automatically return to normal condition
Load water pump interlock error
CHxx011
When the load water pump is turned off for 3 seconds when starting or during
the operation for more than 3 times within 1 hour
When turned off more than 9 seconds within 1 hour
Stop product
Press the HMI Reset button
Load water flow switch error
CHxx013
When the load water flow switch is turned off for 3 seconds when starting or
during the operation for more than 3 times within 1 hour
When turned off more than 9 seconds within 1 hour
Stop product
Press the HMI Reset button
Remote alarm
CHxx015
When the contact point signal of hardware wiring is short when entering the
remote control mode
Stop product
Automatically return to normal condition
106 TROUBLESHOOTING
ENGLISH
Error name
Error code
Error condition
Control during error
Cancel condition
Inverter compressor IPM fault
CHxx021
Inverter compressor drive IPM defect/Inverter compressor defect
Stop applicable cycle
Automatically return to normal condition
Inverter compressor input over-current
CHxx022
Inverter compressor input over-current
Stop applicable cycle
Automatically return to normal condition
Inverter compressor DC link low pressure
CHxx023
DC voltage charge defect
Stop applicable cycle
Automatically return to normal condition
Cycle high pressure switch operation
CHxx024
High pressure switch operates due to abnormal high pressure
Stop applicable cycle
Automatically return to normal condition
High/Low voltage of input voltage
CHxx025
Over/Under permitted voltage of input voltage, N
Stop applicable cycle
Automatically return to normal condition
Inverter compressor start failure error
CHxx026
Initial start failure from compressor defect
Stop applicable cycle
Automatically return to normal condition
PSC/PFC fault error
CHxx027
PSC/PFC fault error
Stop applicable cycle
Automatically return to normal condition
Inverter DC link high voltage error
CHxx028
Defect from DC voltage and over-charge
Stop applicable cycle
Automatically return to normal condition
Inverter compressor over-current
CHxx029
Exceed limit
Stop applicable cycle
Automatically return to normal condition
TROUBLESHOOTING 107
ENGLISH
Error name
Error code
Error condition
Control during error
Cancel condition
Surge in inverter #1 compressor discharge temperature
CHxx032
Surge in inverter #1 compressor discharge temperature
Stop applicable cycle
Automatically return to normal condition
Surge in inverter #2 compressor discharge temperature
CHxx033
Surge in inverter #2 compressor discharge temperature
Stop applicable cycle
Automatically return to normal condition
Surge in high pressure
CHxx034
Surge in high pressure side
Stop applicable cycle
Automatically return to normal condition
Surge in low pressure
CHxx035
Drop in low pressure side
Stop applicable cycle
Automatically return to normal condition
Low compression rate error
CHxx036
Low compression rate error
Stop applicable cycle
Automatically return to normal condition
Communication error between PFC circuit and inverter board
CHxx039
Communication error between PFC circuit and inverter board
Stop applicable cycle
Automatically return to normal condition
Inverter compressor CT sensor error
CHxx040
Inverter compressor CT sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Inverter compressor discharge temperature sensor error
CHxx041
Inverter compressor discharge temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
108 TROUBLESHOOTING
ENGLISH
Error name
Error code
Error condition
Control during error
Cancel condition
Low pressure sensor error
CHxx042
Low pressure sensor is short/open
Stop applicable cycle
Automatically return to normal condition
High pressure sensor error
CHxx043
High pressure sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Chiller air temperature sensor error
CHxx044
Chiller air temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Heat exchanger temperature sensor error
CHxx045
Heat exchanger temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Suction temperature sensor error
CHxx046
Suction temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Inverter #2 compressor discharge temperature sensor error
CHxx047
Inverter #2 compressor discharge temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
IPM temperature sensor error
CHxx049
IPM temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Chiller 3 phase power missing phase
CHxx050
Chiller 3 phase power missing phase
Stop applicable cycle
Automatically return to normal condition
TROUBLESHOOTING 109
ENGLISH
Error name
Error code
Error condition
Control during error
Cancel condition
Communication error with inverter controller
CHxx052
Communication error with inverter controller
Stop applicable cycle
Automatically return to normal condition
Chiller 3 phase power reverse phase / S phase power missing phase
CHxx054
Chiller 3 phase power reverse phase / S phase power missing phase
Stop applicable cycle
Automatically return to normal condition
Communication error with inverter controller
CHxx057
Communication error with inverter controller
Stop applicable cycle
Automatically return to normal condition
Inverter PCB EEPROM error
CHxx060
Inverter PCB EEPROM error
Stop applicable cycle
Automatically return to normal condition
Surge in inverter board IPM temperature
CHxx062
Surge in inverter board IPM temperature
Correspond cycle stop
Automatic return to a normal condition
Inverter IPM temperature sensor error
CHxx065
Inverter IPM temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Fan lock
CHxx067
Fan locked
Stop applicable cycle
Automatically return to normal condition
110 TROUBLESHOOTING
ENGLISH
Error name
Error code
Error condition
Control during error
Cancel condition
Inverter compressor PCB instant over-current (Peak)
CHxx073
Inverter compressor PCB instant over-current (Peak)
Stop applicable cycle
Automatically return to normal condition
Inverter PCB phase imbalance
CHxx074
Phase imbalance
Stop applicable cycle
Automatically return to normal condition
Fan CT sensor error
CHxx075
Fan CT sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Fan DC link high voltage error
CHxx076
Fan DC link high voltage
Stop applicable cycle
Automatically return to normal condition
Fan over-voltage error
CHxx077
Fan over-voltage
Stop applicable cycle
Automatically return to normal condition
Fan hall sensor error
CHxx078
Fan hall sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Fan start failure error
CHxx079
Fan start failure
Stop applicable cycle
Automatically return to normal condition
Main PCB EEPROM error
CHxx086
Main PCB EEPROM access error
Stop applicable cycle
Automatically return to normal condition
Fan PCB EEPROM error
CHxx087
Fan PCB EEPROM access error
Stop applicable cycle
Automatically return to normal condition
TROUBLESHOOTING 111
ENGLISH
Error name
Error code
Error condition
Control during error
Cancel condition
PFC PCB EEPROM error
CHxx088
PFC PCB EEPROM access error
Stop applicable cycle
Automatically return to normal condition
Individual Inletwater temperature sensor error
CHxx090
Individual Inletwater temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Individual Outletwater temperature sensor error
CHxx091
Individual Outletwater temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Surge in control box inner temperature
CHxx092
Surge in control box inner temperature
Stop applicable cycle
Automatically return to normal condition
Control box inner temperature sensor error
CHxx093
Control box inner temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Fan board communication error
CHxx105
Fan board communication error
Stop applicable cycle
Automatically return to normal condition
Fan PCB IPM fault
CHxx106
Fan PCB IPM fault
Stop applicable cycle
Automatically return to normal condition
Fan DC link low voltage error
CHxx107
Fan DC link low voltage
Stop applicable cycle
Automatically return to normal condition
Liquid pipe temperature sensor error
CHxx113
Liquid temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Subcooling Suction temperature sensor error
CHxx114
Subcooling Discharge temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Sub cooling outlet pipe temperature sensor error
CHxx115
Sub cooling outlet pipe temperature sensor Short/Open
Correspond cycle stop
Automatic return to a normal condition
112 TROUBLESHOOTING
ENGLISH
Error name
Error code
Error condition
Control during error
Cancel condition
Reversing valve switching failed
CHxx151
Mode switching failed
Stop applicable cycle
Automatically return to nomal condition
Heat exchanger left side temperature sensor error
CHxx153
Heat exchanger left side temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Heat exchanger right side temperature sensor error
CHxx154
Heat exchanger right side temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Plate type heat exchanger frozen
CHxx180
When the load outlet water temperature is maintained at 3 °C or below after
the compressor started or if the low pressure is maintained at less than 660
kPA after the compressor started
Stop applicable cycle
Automatically return to normal condition
Sub MICOM communication error
CHxx182
When the communication with sub MICOM is disconnected for more than 30
seconds
Stop applicable cycle
Automatically return to normal condition
Load water temperature sensor error
CHxx188
Load sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Surge in inverter board heat emitting plate temperature
CHxx190
Surge in inverter board heat sink temperature
Stop applicable cycle
Automatically return to normal condition
Inverter board heat emitting plate temperature sensor error
CHxx191
Inverter board heat emitting plate temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Surge in fan board heat emitting plate temperature
CHxx192
Surge in fan board heat sink temperature
Stop applicable cycle
Automatically return to normal condition
TROUBLESHOOTING 113
ENGLISH
Error name
Error code
Error condition
Control during error
Cancel condition
Surge in fan board heat emitting plate temperature
CHxx193
Surge in fan board heat sink temperature
Stop applicable cycle
Automatically return to normal condition
Fan board heat emitting plate temperature sensor error
CHxx194
Fan board heat emitting plate temperature sensor is short/open
Stop applicable cycle
Automatically return to normal condition
Chiller PCB communication error
CHxx242
Chiller PCB communication error occurrence
Stop applicable cycle
Automatically return to normal condition
114 APPENDIX
External diagram
• Model name : ACHH020LBAA
Water Outlet
w
(40A)
Water Inlet
(40A)
d
b
Front view
Side view
(Unit : mm)
f
Classification
e
ENGLISH
APPENDIX
g
Rear view
Dimension
A
765
B
2 198
C
2 351
D
2 354
E
200
F
660
G
141.8
APPENDIX 115
ENGLISH
C
• Model name : ACHH040LBAA
w”…’@o•”Œ…”
HVUaI
w”…’@iŽŒ…”
HVUaI
d
a
Front view
b
Side view
E
F
(Unit : mm)
G
Rear view
Classification
Dimension
A
1 528
B
2 198
C
2 354
D
2 154
E
200
F
660
G
141.8
116 APPENDIX
c
w”…’@o•”Œ…”
HVUaI
w”…’@iŽŒ…”
HVUaI
a
d
b
Front view
Side view
(Unit : mm)
F
Classification Dimension
-
ENGLISH
• Model name : ACHH060LBAA
/
Rear view
A
2 291
B
2 198
C
2 354
D
2 154
E
200
F
660
G
141.8
APPENDIX 117
• Model Name : ACHH020LBAA
ENGLISH
Electric Wiring Diagram
118 APPENDIX
ENGLISH
• Model Name : ACHH040LBAA(Main), ACHH060LBAA(Main)
APPENDIX 119
ENGLISH
• Model Name : ACHH040LBAA(Sub), ACHH060LBAA(Sub)
120 APPENDIX
ACHH Heat Exchanger Pressure Drop Graph
20RT
40RT
60RT
Pressure drop (kPa)
ENGLISH
Cold water head loss curve
flow (LPM)
* LPM : Liter Per Minute
Modbus protocol
Coil Register
Register Address
1-8
Length
1 Octet
Meaning
1-RA1
0: Stop
1: Start
2-RA2
0: Maintain 1: Reset alarm
Other
Reserved
APPENDIX 121
ENGLISH
Discrete Register
Register Address
Length
1-8
1 Octet
Other
Reserved
9-16
1 Octet
Other
Reserved
17-24
1 Octet
Other
Reserved
10025
0: Load water flow switch off
1: Load water flow switch on
10026
(Reserved)
Reserved
Other
Reserved
Other
Reserved
Other
Reserved
10044
0: Load water pump output off
1: Load water pump output on
10045
(Reserved)
Reserved
Other
Reserved
Other
Reserved
10054
0: Load water pump output off
1: Load water pump output on
10055
(Reserved)
Reserved
Other
Reserved
25-32
33-40
41-48
49~56
1 Octet
1 Octet
Meaning
1 Octet
1 Octet
57-64
1 Octet
Other
Reserved
65-72
1 Octet
Other
Reserved
73-80
1 Octet
Other
Reserved
81-88
1 Octet
Other
Reserved
89-96
1 Octet
Other
Reserved
122 APPENDIX
ENGLISH
Register Address
97-104
105-112
Length
Meaning
Other
Reserved
10100
0 : Cycle#1 inverter compressor1 condition off
1 : Cycle#1 inverter compressor1 condition on
10101
0 : Cycle#2 inverter compressor1 condition off
1 : Cycle#2 inverter compressor1 condition on
10102
0 : Cycle#3 inverter compressor1 condition off
1 : Cycle#3 inverter compressor1 condition on
10103
(Reserved)
Reserved
10104
0 : Cycle#1 inverter compressor2 condition off
1 : Cycle#1 inverter compressor2 condition on
10105
0 : Cycle#2 inverter compressor2 condition off
1 : Cycle#2 inverter compressor2 condition on
10106
0 : Cycle#3 inverter compressor2 condition off
1 : Cycle#3 inverter compressor2 condition on
10107
(Reserved)
Reserved
10111
Reserved
Other
Reserved
10112
0: Cycle #1 hot gas valve off
1: Cycle #1 hot gas valve on
1 Octet
1 Octet
APPENDIX 123
113-120
Length
1 Octet
Meaning
10113
0: Cycle #2 hot gas valve off
1: Cycle #2 hot gas valve on
10114
0: Cycle #3 hot gas valve off
1: Cycle #3 hot gas valve on
10115
(Reserved)
Reserved
10116
0 : Cycle#1 Oil return valve condition off
1 : Cycle#1 Oil return valve condition on
10117
0 : Cycle#2 Oil return valve condition off
1 : Cycle#2 Oil return valve condition on
10118
0 : Cycle#3 Oil return valve condition off
1 : Cycle#3 Oil return valve condition on
10119
Reserved
Other
Reserved
ENGLISH
Register Address
124 APPENDIX
ENGLISH
Input Register
Register Address
Length
Meaning
30001
2 Octet
Reserved
30002
2 Octet
Load water common pipe inlet water temperature
30003
2 Octet
Load water common pipe outlet water temperature
30004
2 Octet
Reserved
30005
2 Octet
Reserved
30006~30017
24 Octet
Reserved
30018
2 Octet
Outdoor temperature
30019
2 Octet
Reserved
30020
2 Octet
Cycle #1 load water outlet temperature
30021
2 Octet
Cycle #2 load water outlet temperature
30022
2 Octet
Cycle #3 load water outlet temperature
30023
2 Octet
Reserved
30024
2 Octet
Reserved
30025
2 Octet
Reserved
30026
2 Octet
Reserved
30027
2 Octet
Reserved
30028~30034
14 Octet
Reserved
30035
2 Octet
Cycle #1 high pressure
30036
2 Octet
Cycle #2 low pressure
30036~30093
114 Octet
30094
2 Octet
Start delay time
30095
2 Octet
Reserved
30100
2 Octet
Error code
30101
2 Octet
Error product
30102
2 Octet
Error cycle
30103~30107
10 Octet
Reserved
30108
2 Octet
Product accumulated operation time top
30109
2 Octet
Product accumulated operation time bottom
30110~30199
178 Octet
Reserved
Reserved
APPENDIX 125
Length
Meaning
30200
2 Octet
Cycle #1 inverter compressor operating condition
30201
2 Octet
Cycle #2 inverter compressor operating condition
30202
2 Octet
Cycle #3 inverter compressor operating condition
30203
2 Octet
Reserved
30204
2 Octet
Cycle #1 condenser temperature
30205
2 Octet
Cycle #2 condenser temperature
30206
2 Octet
Cycle #3 condenser temperature
30207
2 Octet
Reserved
30208
2 Octet
Cycle #1 evaporator temperature
30209
2 Octet
Cycle #2 evaporator temperature
30210
2 Octet
Cycle #3 evaporator temperature
30211
2 Octet
Reserved
30212
2 Octet
Cycle #1 SC Overheating
30213
2 Octet
Cycle #2 SC Overheating
30214
2 Octet
Cycle #3 SC Overheating
30215
2 Octet
Reserved
30216
2 Octet
Cycle #1 suction temperature
30217
2 Octet
Cycle #2 suction temperature
30218
2 Octet
Cycle #3 suction temperature
30219
2 Octet
Reserved
30220
2 Octet
Cycle #1 EEV
30221
2 Octet
Cycle #2 EEV
30222
2 Octet
Cycle #3 EEV
30223
2 Octet
Reserved
30224
2 Octet
Cycle #1 Cooling standard condenser pip temperature (Left side)
30225
2 Octet
Cycle #2 Cooling standard condenser pip temperature (Left side)
30226
2 Octet
Cycle #3 Cooling standard condenser pip temperature (Left side)
30227
2 Octet
Reserved
30228
2 Octet
Cycle #1 liquid pipe temperature
30229
2 Octet
Cycle #2 liquid pipe temperature
30230
2 Octet
Cycle #3 liquid pipe temperature
ENGLISH
Register Address
126 APPENDIX
ENGLISH
Register Address
Length
Meaning
30231
2 Octet
Reserved
30232
2 Octet
Reversed
30233
2 Octet
Reversed
30234
2 Octet
Reversed
30235
2 Octet
Reserved
30236
2 Octet
Cycle #1 inverter compressor 1 discharge temperature
30237
2 Octet
Cycle #2 inverter compressor 1 discharge temperature
30238
2 Octet
Cycle #3 inverter compressor 1 discharge temperature
30239
2 Octet
Reserved
30240
2 Octet
Cycle #1 inverter compressor 2 discharge temperature
30241
2 Octet
Cycle #2 inverter compressor 2 discharge temperature
30242
2 Octet
Cycle #3 inverter compressor 2 discharge temperature
30243
2 Octet
Reserved
30244
2 Octet
Cycle #2 high pressure
30245
2 Octet
Cycle #2 low pressure
30246
2 Octet
Cycle #3 high pressure
30247
2 Octet
Cycle #3 low pressure
30248
2 Octet
Reserved
30249
2 Octet
Reserved
30250
2 Octet
Cycle#1 Cooling standard condenser pip temperature (Right side)
30251
2 Octet
Cycle#2 Cooling standard condenser pip temperature (Right side)
30252
2 Octet
Cycle#3Cooling standard condenser pip temperature (Right side)
30253
2 Octet
Reserved
APPENDIX 127
ENGLISH
Holding Register
Register Address
Length
Meaning
40001
2 Octet
Demand Limit
(0:Not Used ,10 %~140 %)
40008
2 Octet
Control Mode (Remote/Local)
40011
2 Octet
Cooling Target Temperature
40100
2 Octet
Remote Mode (Contact/Modbus)
128 APPENDIX
ENGLISH
Check List
1 Project information
Content
Information
Project name
Address
Installed by
Sold by
Test run by
2 Model information
Content
Information
Product
Model name:
Serial:
Model name:
Serial:
Model name:
Serial:
Compressor A
Model name:
Serial:
Model name:
Serial:
Model name:
Serial:
Compressor B
Model name:
Serial:
Model name:
Serial:
Model name:
Serial:
APPENDIX 129
ENGLISH
3 Preparation checklist
Content
Check
Is there any damage?
Yes
No
Is the bolt/nut assembled properly?
Yes
No
Does the power specification match the product specification?
Yes
No
Is the wiring done accurately?
Yes
No
Is the product installed correctly?
Yes
No
Are the protective devices of the electric circuit installed correctly in accordance with the specification?
Yes
No
Are all the terminal blocks connected properly?
Yes
No
Are all plugs connected properly?
Yes
No
4 Check cold water system
Content
Check
Are all valves connected to the chiller open?
Yes
No
Are all pipes connected accurately?
Yes
No
Is there any clog for drain pipe?
Yes
No
Is there any leakage?
Yes
No
Is the air within the system well discharged?
Yes
No
Is the cold water pump operating properly?
Yes
No
Is the cold water pump starter connected to the chiller properly?
Yes
No
Is the cold water flow switch operating?
Yes
No
Is the strainer installed on the pipe to the evaporator?
Yes
No
130
ENGLISH
LG Electronics Inc. EU Representative
Krijgsman 1, 1186 DM Amstelveen, The Netherlands
LG Electronics Inc. Changwon 2nd factory
84, Wanam-ro, Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA