LG PWFCKN000 User manual

P/NO : MFL42540230
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 : PWFCKN000
Variable Water Flow Control Kit

Variable Water Flow Control Kit Installation manual
TABLE OF CONTENTS
nSafety Precautions................................................................................3
nAccessory Parts ....................................................................................5
nName of each Part ................................................................................6
nVariable Water Flow Control kit – Functions summary .........................7
nInstallation Method................................................................................8
Variable Water Flow Control kit Installation Method .............................8
nSetting and Using Method ..................................................................11
1. Wiring Diagram ..............................................................................11
2. Wiring for Variable Water Flow Control kit......................................12
3. Series Installation(more than 2 unit)...............................................13
4. Power Source Input .......................................................................14
5.
Variable Water Flow Control Kit Functions ...............................................16
6. Setting of Outside Unit DIP Switch.................................................22
7. Setting Example .............................................................................23
2Variable Water Flow Controller Kit

Installation manual 3
Safety Precautions
nDuring installation
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
nMeanings 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
Be sure to turn off
Outside unit power
Before installation.
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.

4Variable Water Flow Controller Kit
Safety Precautions
nDuring use
Do not modify or extend the
Provided wires.
• 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.

Accessory Parts
Installation manual 5
Accessory Parts
Controller Assy
(Variable Water Flow Control Board,
Transformer, Terminal Block, Harness Single)
Screw(2EA)
Manual
Tie (1EA)

Name of each Part
6Variable Water Flow Controller Kit
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Name of each Part
① Main connector : Power input and communication connector with Outside Unit
② SW104 : Rotary Switch for setting capacity control step
③ Digital Output : Operating & Error status Relay output (DDC output AC 1A at 250V source)
④ SW102 : Switch for setting internal function
⑤ Digital Input : Dry contact input
⑥ Analog Input : DC 0~10V Analog signal input
⑦ Analog Output : DC 0~10V Analog signal output
⑧ SW103 : Reset Switch
⑨ SW101 : DIP Switch for setting operating function
⑩ LED : Indicate VWFC*(board) status
- LED1C(Green) : communication status (receive)
- LED2C(Red) : communication status (transfer)
- LED3C(Yellow) : Communication error status
- LED4C(Orange) : Power status
* Variable Water Flow Control Kit

Variable Water Flow Control kit – Functions summary
Installation manual 7
Variable Water Flow Control kit – Functions summary
Variable Water Flow Control
This function can be applied to save pump operation power by optimizing water flow rate by
interlocking between electric valve and MULTI V WATER IV operation. Depends on MULTI V
WATER IV operation cycle, Variable Water Flow Control Kit(Board) outputs analog signal
(0~10V) to electric valve.
CAUTION
Please keep water flow rate more than 40% of rated water flow indicated MULTI V WATER
IV PDB
Demand control
- This function is to reduce Outside Unit power consumption by using input signal. This manual
provides variable setting to control outside unit capacity according to input method. This function
supports 2 types of input signal : AI(0~10V) and contact signal(3 Step).
Output Outside or Indoor Unit Operation status
- This function displays outside or indoor unitʼs operation status. Depends on DIP switch setting,
either outside or indoor unit operation status is reflected through output signal.
Output Outside or Indoor Unit Error Status Signal
- This function displays error signal by digital output when either outside or indoor unit has an
error

Installation Method
8Variable Water Flow Controller Kit
Variable Water Flow Control kit Installation Method
Installation Method
① Be sure to turn off outside unit power before installaion.
② Separate front panel from outside unit
③Separate front cover of control box.
④ Separate Oil_Level Harness(3Pin Yellow) in External PCB(CN28).
⑤ Sepatate VWFC* Cover in VWFC Assy.
⑥ Install the VWFC Assy to the C/Box by using screws.
* VWFC : Variable Water Flow Control kit
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* Separate of Oil_Level harness
* Tighten the screw from bottom to
the top direction.
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CAUTION
Be sure to turn off outside unit power before installation.

Installation Method
Installation manual 9
⑦ Connect a power cable (AC 24V) of water flow control valve to the terminal block
(2Pin Terminal block, Max current 0.42A).
⑧ Connect a signal cable (DC 0~10V) of water flow control valve to CN1_A0(A0_1(A+), GND(A-))
of VWFC.
⑨ Set up the main function DIP Switch of VWFC PCB. (Refer to 16page)
⑩ Pull out put through the cover hole.
⑪ Install the VWFC Cover by using screws.
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AO_1
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Setting and Using Method
10 Variable Water Flow Controller Kit
⑫ Connect the blue cable of transformer to the Main PCB(CN_JIG_N,CN_JIG_L).
⑬ Connect the black cable of VWFC PCB to the Main PCB(CN10).
⑭ Connect the Oil_Level harness(3Pin Yellow) to the External PCB(CN28).
⑮ Fix and fasten components and cables.
⑯Turn on the main power line of outside unit.
ۄ
ۃ
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.
4.
It must be installed variable flow valve on water circulation system in advance.
5. The internal resistance of variable water flow control valve must be above 100kΩ. The resistance of
signal cable(CN1_A0) must be below 10Ω.