Page 1
LG
AHU Control Kit / EEV Kit
Installation Manual
LG
IMPORTANT
• 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.
Visit us at : http://www.lgservice.com
Models: PRCKA0
PRLK048A0
ENGLISH
Page 2
2 AHU Control Kit / EEV Kit
AHU Control Kit / EEV Kit Installation Manual
TABLE OF CONTENTS
■ Safety Precautions.............................................................3
■ Installation Scene...............................................................4
■ Supplies..............................................................................5
■ Optional Accessories.........................................................6
■ Part Description..................................................................7
■ Control Kit (PRCKA0).................................................................................7
■ EEV Kit(PRLK048A0).................................................................................8
■ Before Installation..............................................................9
■ EEV Kit Installation..........................................................11
■ Mechanical installation........................................................................11-12
■ Brazing work .......................................................................................13-14
■ Electrical work ..........................................................................................15
■ Control Kit Installation......................................................16
■ Mechanical installation.............................................................................16
■ Electric wiring work.............................................................................17-19
■ Dry contact connection_optional accessory............................................20
■ Thermistors Installation ...................................................21
■ Pipe thermistors installation................................................................21-23
■ Room thermistor.......................................................................................24
■ Test Operation..................................................................25
■ Troubleshooting................................................................26
Page 3
Safety Precautions
Installation Manual 3
ENGLISH
■ Installation
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■ Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
Be sure not to do.
Be sure to follow the instruction.
WARNING
When the product is soaked (flooded or
submerged), contact an Authorized Service
Center.
• There is risk of fire or electric shock.
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product
damage.
■ Operation
Use the correctly rated
breaker or fuse.
• There is risk of fire or electric
shock.
Do not install, remove, or reinstall the unit by yourself
(customer).
• There is risk of fire, electric
shock, explosion, or injury.
For installation, always
contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric
shock, explosion, or injury.
Don't touch with the
hands while the power is
on
•
There is risk of fire or electric
shock.
Use standard
parts(connector).
•
Do not disassemble or repair
the product. There is risk of fire
or electric shock.
For electrical work, contact
the dealer, seller, a qualified
electrician, or an Authorized
Service Center.
•
Do not disassemble or repair
the product. There is risk of fire
or electric shock.
WARNING
CAUTION
Page 4
4 AHU Control Kit / EEV Kit
Installation Scene
Installation Scene
1
2
3
4
5
Air Handling Unit
Outdoor Unit
AHU Control Kit(PRCKA0)
AHU EEV Kit(PRLK048A0)
Field piping
Field supply
Multi_V
-
-
Field supply
Parts and components
6
7
8
9
10
Control kit wiring
Pipe thermistors (EBG36949304/EBG36949305)
Room thermistor (EBG36949303)
Remote controller(PQRCUSA0)
Dry contact PCB(PQDSBNGCM0)
(Power supply and communication between control kit and outdoor unit)
Evaporator (In/Out) control of Air Handling Unit
Return air control
Optional accessory
Optional accessory
Wiring connections
No. Name Remarks
Signal
Pipe
Thermistor
Air flow
Refrigerant flow
(Cooling)
Refrigerant flow
(Heating)
7
8
1
9
3
10
6
4
2
5
Page 5
Installation Manual 5
ENGLISH
Supplies
Supplies
Components
Quantity(EA) 1 1 2(Each 1) 1 5(Each 1)
AHU Control Kit Room thermistor Pipe thermistors
Installation
manual
Capacity setting
option PCB
AJT57850901 EBG36949303
EBG36949304(black)
EBG36949305 (red)
MFL50024801
EBR52358907/09
/10/11/12
P/NO
Shape
PRCKA0
Components
Quantity(EA)
11
AHU EEV Kit Installation manual
AJT57850801 MFL50024801
P/NO
Shape
PRLK048A0
Model Name
Weight(kg) Dimension(mm)
POWER
NET Gross W H D
PRCKA0 2.2 3.6 280 135 280 220~240V/50Hz/1Phase
PRLK048A0 3.1 3.6 404 83 217 -
H
D
W
W
H
D
Page 6
6 AHU Control Kit / EEV Kit
Optional Accessories
Optional Accessories
Components Remote controller Dry contact PCB
PQRCUSA0 PQDSBNGCM0
Model name
Shape
Accessories
* For further details of the accessories, refer to the manual provided at the time of purchasing the
accessories.
Page 7
Installation Manual 7
ENGLISH
Part Description
Part Description
Control Kit (PRCKA0)
1
2
3
4
5
6
7
8
9
10
11
12
Plastic (+) bolt
Control box cover
Main PCB
Option PCB(36k)
Main PCB case
Terminal block (communication)
Terminal block (POWER Supply)
Panel
Support Tie wrap
Control box case
Cable gland(2type)
Bracket
4
1
1
1
1
1
1
1
8
1
8
4
No. Part Name Quantity(EA)
7
9
1
CN-OPTION
6
2
4
3
5
8
10
12
11
Page 8
8 AHU Control Kit / EEV Kit
Part Description
EEV Kit(PRLK048A0)
1
2
3
4
5
6
7
8
Panel upper
Bracket
Terminal box
Cable gland
Insulator tube
EEV assembly (EEV, Strainer, Tube)
Support tie wrap
Panel base
1
2
1
2
1
1
1
1
No. Part Name Quantity(EA)
3
1
4
4
5
6
7
8
2
Page 9
Installation Manual 9
ENGLISH
Before Installation
Before Installation
■ Don't install or operate the unit in rooms mentioned below.
Where mineral oil, like cutting oil is present.
Where the air contains high levels of salt such as air near the ocean.
Where sulphurous gas is present such as that in areas of hot spring.
In vehicles or vessels.
Where voltage fluctuates a lot such as that in factories.
Where high concentration of vapor spray are present.
Where machines generating electromagnetic waves are present.
Where acidic or alkaline vapor is present.
The option boxes must be installed with entrances downward.
CAUTION
■ Check the mentioned below, when you apply the AHU(Field supply).
If the AHU (Field supply) provided in the field is exclusively for heating, you must not
change the operating mode to cooling on the remote controller. If not, it can cause electric
shock, injury or death. If you want to operate in cooling mode, AHU (Field supply) must
comply with the following details.
(Following)
- The insulation level of AHU (Field supply) motor must be ‘F’ or above, and the protection
level must satisfy ‘IP 54’.
- AHU (Field supply) must have the drain pan installed.
Fan speed button on the wired remote controller(PQRCUSA0) is not operated.
For refrigerant piping of outdoor unit, refer to the installation manual supplied with the
outdoor unit.
For installation of the wired remote controller(PQRCUSA0), refer to the manual supplied
with the wired remote controller.
For connection of the Dry contact PCB(PQDSBNGCM0), refer to the manual supplied with
the Dry contact PCB(PQDSBNGCM0).
■ AHU Control Kit
Thermistor cable and remote controller wire should be located at least 50mm away from
power supply wires and from wires to the controller. Not following this guideline may result
in malfunction due to electrical noise.
Use only specified wires, and tightly connect wires to the terminals. Keep wiring in neat
order so that it does not obstruct other equipment. Incomplete connections could result in
overheating, and in worse case electric shock or fire.
Page 10
10 AHU Control Kit / EEV Kit
Before Installation
Selection of Evaporator(Air Handling Unit)
See table below for applicable units
Selecting the capacity setting 'Option PCB'(Accessory) according to the capacity mentioned below.
-
The corresponding capacity setting '
Option
PCB' needs to be selected depending on the need
capacity.
- After checking the need capacity, remove the 36k
Option
PCB equipped in the main PCB,
and set up the
Option
PCB fitted the need capacity in the main PCB.
CAUTION
Saturated Suction Temperature (SST) = 6°C, SH (Superheat) = 5K, Air Temperature = 27°C DB / 19°C WB.
(Main PCB)
EBR52358907 28K 0.88~1.08 7 ~ 9 22 ~ 26
EBR52358908 36k 0.88~1.08 9 ~11 25 ~ 32
EBR52358909 42k 0.88~1.08 11~ 13 31 ~ 35
EBR52358910 48k 1.23~1.51 13 ~ 16 33 ~ 45
EBR52358911 76k 1.93~2.35 20 ~ 24 50 ~ 64
EBR52358912 96k 1.93~2.35 25 ~ 31 64 ~ 72
Option PCB
P/No
Capacity
(Btu/h)
Allowed heat
exchanger
Volume (dm
3
)
Allowed heat
exchanger capacity
(kW)
Air flow rate
(CMM)
Detail
Capacity setting
'Option PCB'
Page 11
Installation Manual 11
ENGLISH
EEV Kit Installation
EEV Kit Installation
Mechanical installation
1. Remove the EEV Kit box cover by unscrewing the screw(4EA).
2. Drill 4 holes on correct position and fix the EEV Kit box securely with 4 screws(Field supply)
through the provided holes Ø6 mm(Reference the length of the holes Ø6)
190 mm
Provided holes
Ø6 mm (4EA)
Pipe size
Ø12.7 mm(1/2")
338 mm
Page 12
12 AHU Control Kit / EEV Kit
EEV Kit Installation
3. Prepare the inlet/outlet field piping just in front of the connection(do not braze yet).
4. Remove the pipe fixing bracket(C) by unscrewing 4 x M4.
5. Remove the Pipe insulation.
6. Braze the field piping.
A. Inlet coming from the outdoor unit
B. Outlet to evaporator
C. Pipe fixing bracket(2EA)
D. Pipe insulation
E. EEV Assembly
F. Field pipe(Inlet / Outlet)
■ Make sure to cool the filters and EEV body with a wet cloth and make sure the body
temperature does not exceed 120°C during brazing.
■ Make sure that the other parts such as electrical box, tie wraps and wires protected from
direct brazing flames during brazing.
CAUTION
Mechanical installation
E
D
C(2EA)
B A
F
F
Page 13
Installation Manual 13
ENGLISH
EEV Kit Installation
Brazing work
7. After brazing, put the Pipe insulation(D) on the EEV Assembly(E) and fold the Pipe
insulation(D) mentioned below (after pealing off the liner).
8. Secure the pipe fixing bracket(C:2EA) in place again (4 x M4)
9. Make sure that field pipes are fully insulated.
Field pipe insulation must reach up to the insulation you have put back in place as per
procedure step 7. Make sure that there is no gap between both ends in order to avoid
condensation dripping (finish the connection with tape eventually).
Fold
Liner
Page 14
14 AHU Control Kit / EEV Kit
EEV Kit Installation
■ Be sure to carry out a nitrogen blow when brazing.
Brazing without carrying out nitrogen replacement or releasing nitrogen into the piping will
create large quantities of oxidized film on the inside of the pipes, adversely affecting
valves and compressors in the refrigerating system and preventing normal operation.
■ When brazing while inserting nitrogen into the piping, nitrogen must be set to 0.02 MPa
with a pressure-reducing valve(just enough so that it can be felt on the skin).
CAUTION
■ The leakage test is executed by pressurizing nitrogen gas up to 3.8MPa(38.7kgf/cm2)
(The test must be done with the service valve of the outdoor unit closed and the gas must
be pressurized at the liquid pipe, gas pipe and high/low pressure common pipe of the
outdoor unit), and the pressure of the nitrogen gas must not drop for 24 hours.
■ For more details, refer to the manual of the outdoor unit.
a Refrigerant piping b Part to be brazed
c Taping d Hands valve
e Pressure-reducing valve f Nitrogen
Brazing work
a b
c
e
d
brazing
f
f
Page 15
Installation Manual 15
ENGLISH
EEV Kit Installation
Electrical work
10. Open the terminal box cover(A).
11.
Pass EEV cable(Field supply, 6 wires) from the AHU Control Kit through cable gland and connect
the cable wires into the terminal connector(C) following instructions as describe in step 12. Route
the cable out of the
EEV Kit
box according to figure below and fix with the support tie wrap(D).
A. Terminal box cover
B. Cable gland
C. Terminal connector
D. Support tie wrap
E. Electric wiring work(Field supply, 6 wires)
NOTE
1. BR : BROWN
2. RD : RED
3. BL : BLUE
4. OR : ORANGE
5. YL : YELLOW
6. WH : WHITE
12. Use a screwdriver(+) and follow indicated instructions for connecting cable wires into the
terminal connector according to the circuit diagram.
13.
Make sure that field wiring and insulation is not squeezed when closing the EEV Kit box cover.
14. Close the EEV Kit box cover(4 x M4).
■ Before connecting the wires(Field supply), make sure to compare with the Connect
label between EEV Kit and Control Kit.
■ Make sure to connect the wires according to the circuit diagram in Control Kit.
CAUTION
A
B
D
E
Detail
EEV
BRRDBLORYLW
C
H
E
Field connect wires
Detail
Connect
Label
EEV
BRRDBLORYLW
H
Field work
EEV
BRRDBLORYLW
H
Page 16
16 AHU Control Kit / EEV Kit
Control Kit Installation
Control Kit Installation
Mechanical installation
1. Remove the Control Kit box cover by unscrewing the plastic bolt(4EA).
2. Drill 4 holes on correct position and fix the Control Kit box securely with 4 screws(Field supply)
through the provided holes Ø4.5 mm(Reference the length of the holes Ø4.5)
298 mm
189 mm
Provided holes
Ø4.5 mm (4EA)
Page 17
Installation Manual 17
ENGLISH
Control Kit Installation
Electric Wiring Work
1. For electric wiring, refer to figure 'Circuit diagram' mentioned below.
■ Circuit diagram
CN-POWER AC POWER SUPPLY
AC POWER LINE INPUT FOR INDOOR CONTROLLER
CN-COM COMMUNICATION
CONNECTION BETWEEN INDOOR AND OUTDOOR
CN-ROOM ROOM SENSOR ROOM AIR THERMISTOR
CN-PIPE/IN SUCTION PIPE SENSOR PIPE IN THERMISTOR
CN-PIPE/OUT
DISCHARGE PIPE SENSOR
PIPE OUT THERMISTOR
CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE
CN-FLOAT FLOAT SWITCH INPUT FLOAT SWITCH SENSING
CN-EEV EEV OUTPUT EEV CONTROL OUTPUT
CN-OPTION OPTION PCB
COMMUNICATION BETWEEN MAIN AND OPTION
CN-CC DRY CONTACT DRY CONTACT LINE
LOCATION POINT FUNCTION
CONNECTOR
NUMBER
Page 18
18 AHU Control Kit / EEV Kit
4. For the wired remote controller wire and outdoor unit communication wire, remove the coating
at the end of the wire to connect and use the ring type (Ø3) to connect to the terminal block.
Ring type (Ø 3)
POWER SUPPLY
FAN SIGNAL
Outdoor com.
Room thermistor
Pipe thermistor(In/Out)
Remote controller
EEV Kit
DRY contact
No. Electric wire
Control Kit Installation
Electric Wiring Work
2. For connection to outdoor unit and to controller (Field supply) :
Pull the wires inside through the cable gland and close that's nut firmly in order to ensure a
good pull relieve and water protection.
3. The wires require an additional pull-relief. Strap the wire with the support tie wrap.
5. Each wire have to pass the number of the cable gland mentioned below.
(Side view)
■ Connection of the wires
Detail
Support
tie wrap
Nut of cable
gland
Cable insert
(Side view)
8
1 2 3 4 5 6 7
Page 19
Installation Manual 19
ENGLISH
Control Kit Installation
Electric Wiring Work
■ All field supplied parts and materials and electric works must be conform to local codes.
■ Use copper wire only.
■ All wiring must be performed by an authorized electrician.
■ A main switch or other means for disconnection, having a contact separation in all poles,
must be incorporated in the fixed wiring in accordance with relevant local and national
legislation.
■ Refer to the installation manual attached to the outdoor unit for the size of power supply
electric wire connected to the outdoor unit, the capacity of the circuit breaker and switch,
wiring and wiring instructions.
CAUTION
Page 20
20 AHU Control Kit / EEV Kit
Control Kit Installation
Dry contact connection_optional accessory
Local controller
CN-INDOOR1
CN-INDOOR2
CD_Operation
CN_OUT
Dry Contact PCBDry Contact PCB
Dry contact PCB
Signal
CN_Ther/Per
Field work
1. Using screw(4EA), fix the dry contact on the side panel.
2. Using cable, connect the dry contact to main PCB.
For more information, please refer to dry contact installation manual.
Dry contact
installation location
❈ Applicable dry contact model
- PQDSBNGCM0
Page 21
Installation Manual 21
ENGLISH
Thermistors Installation
Pipe thermistors Installation
Location of the pipe thermistors
A correct installation of the thermistors is required to ensure a good operation :
1. Pipe_In(EBG36949304)
: Install the thermistor behind the distributor on the coldest pass the heat exchanger
(contact your heat exchanger dealer).
2. Pipe_Out(EBG36949305)
: Install the thermistor at the outlet of the heat exchanger as close as possible to the
heat exchanger.
Evaluation must be done to check if the evaporator is protected against freeze-up.
Execute test operation and check for freeze-up.
1 Pipe_In(Suction pipe)
2 Pipe_Out(Discharge pipe)
(Air Handling Unit)
Thermistors Installation
1
2
Page 22
22 AHU Control Kit / EEV Kit
Thermistors Installation
Pipe thermistors Installation
Installation of the pipe thermistor cable
1. Put the thermistor cable in a separate protective tube.
2. Always add a pull-relief to the thermistor cable to avoid atrain on the thermistor cable and
loosening of the thermistor. Strain on the thermistor cable or loosening of the thermistor
may result in bad contact and incorrect temperature measurement.
2
45°
1
Fixation of the pipe thermistors (Field work)
1. Fix the thermistor with insulating aluminum tape (Field supply) in order to ensure a good
heat transference.
2. Put the supplied piece of rubber around the thermistor(EBG36949304/05) in order to
avoid loosening of the thermistor after some years.
3. Fasten the thermistor with 2 tie wraps.
4. Insulate the thermistor with the supplied insulation sheet.
1234
Page 23
Installation Manual 23
ENGLISH
Thermistors Installation
Fixation of the pipe thermistors (Field work)
1. Fix the thermistor with insulating aluminum tape (Field supply) in order to ensure a good
heat transference.
2. Put the supplied piece of rubber around the thermistor(EBG36949304/05) in order to
avoid loosening of the thermistor after some years.
3. Fasten the thermistor with 2 tie wraps.
4. Insulate the thermistor with the supplied insulation sheet.
INSTRUCTION
■ Put the thermistor wire slightly top to avoid water accumulation on down of the thermistor.
■ Make good between thermistor and evaporator. Put the top of the thermistors on the
evaporator, this is the most sensitive point of the thermistor.
1 Most sensitive point of the thermistor
2 Maximize the contact
Pipe thermistors Installation
2
1
45°
Page 24
24 AHU Control Kit / EEV Kit
Thermistors Installation
Room thermistor
Installation of the Room thermistor
1. The room thermistor have to be installed in the return air part of the AHU(Field supply)
mentioned below.
(Air Handling Unit)
(AHU Control Kit)
Thermistor
Air flow
Page 25
Installation Manual 25
ENGLISH
Test Operation
Test Operation
Before test operation, be sure all information is understood completely, and follow the
guideline of manual.
■ Check the refrigerant piping of outdoor unit.
(Additional charging of the refrigerant ,the maximum allowed piping length and open the stop valve)
* For more detailed information of that, refer to the installation manual supplied with the
outdoor unit.
■ Executing the test operation.
1. Connect the power and turn on with the wired remote controller(PQRCUSA0).
2. Check the AHU(Field supply) and outdoor unit operation when the wired remote
controller (PQRCUSA0) is controlled.
* For more detailed function of the wired remote controller, refer to the Owner's &
Installation manual supplied with the wired remote controller.
* Button
on the wired remote controller(PQRCUSA0) is not operated.
OPERATION INDICATION
SCREEN
SET TEMPERATURE Button
WIRELESS REMOTE
(Do not operate)
CONTROLLER RECEIVER
• Some products don't receive the
wireless signals.
VENTILATION Button
(Do not operate)
OPERATION MODE SELECTION
Button
SUBFUNCTION Button
FUNCTION SETTING Button
EXIT Button
ON/ OFF Button
ROOM TEMPERATURE Button
FAN SPEED Button
(Do not operate)
AIR FLOW Button
(Do not operate)
RESERVATION/ TIME SETTING
Button
SETTING/ CANCEL Button
UP, DOWN, LEFT, RIGHT Button
1
9
11
12
3
5
6
2
4 10
13
14
7
8
15
Please attach the inform label inside of the door.
Please choose proper language defend on your
country.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Page 26
26 AHU Control Kit / EEV Kit
Troubleshooting
Troubleshooting
AHU Control Kit
does not work
AHU EEV Kit
does not work
No power supply Check the electrical connection and voltage of the
power supply.
Wiring is wrong Check the electrical connection of the Control kit
(Refer to the circuit diagram of the Control Kit)
AHU Control Kit is broken Check the electrical and mechanical part.
Wiring is wrong Check the electrical connection of the EEV Kit
Piping is wrong Check the piping connection between the EEV Kit
and outdoor unit
Problem Cause Remedy
Page 27
P/No.: MFL50024801
After reading this manual, keep it in a place easily accessible to the user for future reference.
Printed in Korea
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