LG PRVC0 User manual

P/NO : MFL42540224 www.lg.com
INSTALLATION MANUAL
• 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.
MODEL : PRVC0
Variable Water Flow Control Kit
FRANÇAIS
ENGLISH

Variable Water Flow Control Kit Installation manual
TABLE OF CONTENTS
■Safety Precautions................................................................................3
■Accessory Parts....................................................................................5
■Name of each part ................................................................................6
■Installation Method................................................................................7
■Setting and using method.....................................................................8
1. Wiring Diagram.................................................................................8
2. Power source input...........................................................................9
3. Wiring for variable water flow control PCB and transformer...........11
4. Wiring for Variable Water Flow Valve .............................................12
5. Wiring Method ................................................................................13
6. Setting of ‘SWDIP’..........................................................................17
7. Setting of outdoor unit dip SW .......................................................18
2Variable Water Flow Control Kit

■During 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.
WARNING
CAUTION
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
Installation manual 3
Safety Precautions
ENGLISH
Please install the
designated location in the
Control box.
• It can cause the breakdown
or accident.
Do not touch the board
when the power is
connected .
• It can cause a fire, electric
shock, explosion, injury and
problem to the product.
Always request for
installation of the product to
the service center or the
installation service provider.
• It can cause a fire, electric
shock, explosion and injury.
When reinstalling the previously
installed product, request for service to
the service center or the installation
service provider.
• It can cause a fire, electric shock, explosion and
injury.

■During use
4Variable Water Flow Control Kit
Safety Precautions
Do not modify or extend the
power cord.
• It can cause a fire and
electric shock.
Do not pour water inside the
product.
• It can cause an electric
shock and problem to the
product.
When the product is submersed
in water, always request for
service to the service center or
the installation service provider.
• It can cause a fire and
electric shock.
Make the children and the
elderly use the product with
the help of a guardian.
• It can cause a safety
accident and problems to
the product.
Do not give impact to the
product.
• It can cause problem to the
product.

Installation manual 5
Accessory Parts
ENGLISH
Accessory Parts
Cable Assy Terminal Block Assy
Wire Holder
Variable Water
Flow Control PCB
Transformer
Screw (4EA)

Name of each part
6Variable Water Flow Control Kit
Name of each part
1. CN_PWR : Power input terminal(DC 12V)
2. CN_AO : Signal output terminal to control a water flow control valve(DC 0~10V)
3. CN_OUT : Outdoor unit connector
4. BUS_A : RS-485 (+) terminal
5. BUS_B : RS-485 (-) terminal
6. SWDIP : Switch to select main function
7. SW1 : Reset switch
Variable Water Flow Control Kit
16 7
3 2
4
5

Installation manual 7
Installation Method
1. Shut off the main power line of outdoor unit.
2. Install the VWFC(Variable Water Flow Control) PCB in the C/BOX by using screws.
3. Install the transformer in the C/BOX by using screws.
4. Install the terminal block in the C/BOX by using screws.
5. Connect the Main PCB(CN41) to VWFC(CN_OUT) by using the cable assy.
6. Connect the blue wire of transformer to the Main PCB (JIG1(L), JIG2(N)).
7. Connect the red wire of transformer to the terminal block (2Pin Yellow terminal block).
8. Connect a power cable (DC 12V) to CN_PWR(12V, GND) of VWFC.
9. Connect a signal cable (DC 0~10V) of water flow control valve to CN_AO(AO_01(A+), GND(A-)) of VWFC.
10. Case of two water flow control valve, Connect a signal cable (DC 0~10V) of water flow control valve to
CN_AO(AO_02(B+), GND(B-)) of VWFC.
11. Connect a power cable (AC 24V) of water flow control valve to the terminal block (2Pin Yellow terminal block,
Max current 0.42A).
12. Connect the RS-485 communication cable to CN_COMM(BUS_A, BUS_B) of VWFC
13. Set up the main function Dip S/W of VWFC PCB.
14. Set up the Dip SW of outdoor main PCB.
15. Turn on the main power line of outdoor unit.
16. Check the signal of water flow control valve to CN_AO(AO_01, GND) of VWFC and the water flow rate.
1. Install the product on flat surface and screw at least 2 places. Otherwise the VWFC PCB may not be
anchored properly.
2. Do not deform the case at random. It may cause malfunction of the Variable Water Flow Control PCB
3. This is a class A product. In a non-industrial environment, this product may cause radio interference, in
which case the user may be required to take adequate measures.
ENGLISH
Installation Method
1 2 3
1: Terminal block
2 : Transformer
3 : VWFC PCB

Setting and using method
1. Wiring Diagram
8Variable Water Flow Control Kit
Setting and using method

Setting and using method
Installation manual 9
ENGLISH
2. Power source input
■
When wiring power source from outdoor unit
Outdoor Unit
PCB
DC12V or DC15V
GND
Power Source
DC12V
GND
■When using external power source
Notes
This device can accept only DC Power input.
Do not input 220VAC. Otherwise It will cause a serious damage.
Using external power source is recommended.

Setting and using method
Central
Control
Devices
BUS_A
BUS_B
10 Variable Water Flow Control Kit
■
When using ODU Dry contact with Central Control Devices