LG Low Ambient Control Kit User manual

P/NO : MFL42540228
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.
❈PRVC2 is available only for the Multi-V IV model
(PRVC2 can not be installed for the previous Multi-V IV model)
MODEL : PRVC2
Low Ambient Control Kit

Low Ambient Control Kit Installation manual
TABLE OF CONTENTS
■Safety Precautions................................................................................3
■Accessory Parts ....................................................................................6
■Name of each Part ................................................................................7
■Installation Method................................................................................8
1. IO Module Installation Method..........................................................8
2. Transformer, Terminal Block Installation Method............................10
■Setting and Using Method ..................................................................12
1. Wiring Diagram ..............................................................................12
2. Power Source Input .......................................................................13
3. IO Module - Low Ambient Kit Function...........................................15
4. IO Module – Other Function ...........................................................16
5. Wiring for Damper Actuator............................................................19
6. Setting of Outdoor Unit Dip Switch.................................................22
■Installation Method of Snow Hood and Air Damper ...........................23
1. One Unit with Snow Hood and Air Damper ...................................23
2. Two and Three Units with Snow Hood and Air Damper ................24
3. Unit Placement and Clearances.....................................................25
2Low Ambient Control Kit

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
■Installation
Service
Center
Service
Center
Don’t touch with the hands
while the power is on.
• Cause fire, electric shock,
explosion or injury.
Product installation must
be referred to a service
center or installation shop.
• Cause fire, electric shock,
explosion or injury.
Request installation from
installation shop or service
center when reinstalling
the product.
• Cause fire, electric shock,
explosion or injury.

4Low Ambient Control Kit
Safety Precautions
Standardized
product
Do not install the product
in the place where rain can
get to the product.
• Cause product failure
Do not install the unit in
humid locations.
• Cause product failure
Do not put the product
closer to fire.
• Cause fire
Do not install in a place
that cannot withstand the
weight of the product.
• The product may get
damaged or may break.
Do not install the product
to a place that generates
oil, steam, salt, sulfuric
gas, etc.
• Cause the product’s
deformation or failure.
Use standardized Product.
• Cause product failure
Do not change or extend
power lines arbitrarily.
• Cause fire or electric shock.
Do not give a shock to the
product.
• If you give a shock to the
product, it may cause the
product’s failure.
Do not use a heater near
the power line.
• Cause fire or electric shock.
■Operation

Safety Precautions
Installation manual 5
Service
Center
STOP
Do notspill water inside of
the product.
• Cause electric shock or
breakdown.
If the product has been
inundated, you must refer to
a service center or
installation shop.
• It can cause a fire.
Children and elderly use the
product under the
guardian’s supervision.
• Cause accidents and product
failures.
Do not use for special
purpose / place such as
conserving flora and fauna,
precision instruments, art.
• Otherwise, it can cause property
damage.
Remove the power plug
when cleaning.
• Cause fire or electric shock.
Do not place heavy objects
on the power line.
• Cause fire or electric shock.
Do not disassemble, repair,
or modify the product.
• Cause fire or electric shock.
Do not touch with wet
hands.
• Cause fire or electric shock.

Accessory Parts
6Low Ambient Control Kit
Accessory Parts
IO Module
Bracket 1
Terminal Block (2EA)
Bracket 2
Screw (9EA)
Manual
Cable (3EA)
Tie (2EA)
Transformer
Clamp

Name of each Part
Installation manual 7
ڸ
ڹ
ں
ڻ
ڼڽ
ۀ
ڿ
ھ
Name of each Part
① Main connector : Power input and communication connector with Outdoor unit
② SW104 : Rotary Switch for setting Demand control step
③ Digital Output : Operating & Error status Relay output (250V, 1A)
④ SW102 : Switch for setting internal function
⑤ Digital Input : Dry contact input
⑥ Analog Input : DC0~10V Analog signal input
⑦ Analog Output : DC0~10V Analog signal output
⑧ SW103 : Reset Switch
⑨ SW101 : Dip Switch for setting operating function

Installation Method
8Low Ambient Control Kit
1. IO Module Installation Method
Installation Method
① Separate front panel from outdoor unit.
② Separate front cover of control box.
③ Assemble IO Module and bracket.
④
Connect the connection wires according to the instructions. (Please refer to Setting and Using Method)
ڸ
ڹ
ں
+
ڻ
Main board connector
CAUTION
Be sure to turn off outdoor unit power before installation.

Installation Method
Installation manual 9
⑤ Fix and fasten components and cables.
⑥ Perform the switch setting according to the instructions.

Installation Method
10 Low Ambient Control Kit
2. Transformer, Terminal Block Installation Method
①Shut off the main power of outdoor unit.
②Install the IO Module in the C/Box by using screws.
③Install the Bracket2 in the C/Box by using screws.
④Install the transformer on the Bracket2 by using screws.
⑤Install the terminal block on the Bracket2 by using screws.
⑥Connect the Main PCB(CN10) to IO Module(CN101) by using the cable assembly.
⑦Connect the blue cable of transformer to the Main PCB(JIG_N), brown cable of transformer to
the Main PCB(JIG_L).
⑧Connect the red cable of transformer to the terminal block (2Pin Yellow terminal block).
⑨Connect a power cable(DC 12V) to CN101(12V,GND) of IO Module.
⑩Connect the black cable of Damper Actuator to the terminal block and connect the cable of
IO Module(CN1_A0(GND(A-)) to the black cable of Damper Actuator.
⑪Connect the red cable of Damper Actuator to CN1_A0(A0_1(A+)) of IO Module.
⑫Set up the main function Dip S/W of IO Module.
(SW101 : L1,L2=On and L3,L4=Off / SW102 : L1,L2=Off)
⑬Set up the Dip S/W of Main Outdoor unit PCB. (Refer to page 21 for details)
⑭Turn on the main power of outdoor unit.
⑮Check the signal to CN1_A0(AO_01,GND) of IO Module and Air Damper.
+
Transformer
Clamp
Bracket 2
Terminal Block

Setting and Using Method
Installation manual 11
Using the Clamp and Tie, fasten the Damper Actuator output cable and Trans output cable as
below.
Actuator Wire

Setting and Using Method
12 Low Ambient Control Kit
1. Wiring Diagram
Setting and Using Method

Setting and Using Method
Installation manual 13
2. Power source input
Error Status
Input_1 Input_2 Input_3 Input_LNO Reserved Priority setting
AI_1 Reserved
AO_4
AO_3
AO_2
AO_1
Power
AC or DC
Power
AC or DC
Operating Status
ڸڹ
ں
ڻ
①Dry contact input part
Connect Non Voltage contact signal for demand control (3 step)
* Priority setting
Using ‘Priority setting’ contact signal, set the priority of command.
(External command from DDC Vs Command from LG central controller.)
- Close : Central controller has priority to external signal.
- Open : External signal has priority to central controller.
②Analog input part
Connect Analog input signal for demand control (10 step)
③Analog output part
Connect Analog output signal for controlling third party devices.
Ex) Valve actuator for variable water flow. Damper actuator for Low Ambient Kit
④Digital output part
Connect status display devices.
AI : Analog Input (DC0~10V)
AO : Analog Output ( DC0~10V, Max 20mA)
Input_LNO : Low Noise Operation
CAUTION
Power must be turned on after the product is wired completely.

Setting and Using Method
14 Low Ambient Control Kit
■
Communication and Power Line
- If communication and power lines are run alongside each other then there is a strong likelihood of
operational faults developing due to interference in the signal wiring caused by electrostatic and
electromagnetic coupling. The tables below indicates our recommendation as to appropriate spacing
of communication and power lines where these are to be run side by side.
Current capacity of power line Spacing
100V or more
10A 11-13/16 in (300 mm)
50A 19-11/16 in (500 mm)
100A 39-3/8 in (1,000 mm)
Exceed 100A 59-3/64 in (1,500 mm)
Notes
If the power supply waveform continues to exhibit some distortion the recommended spacing in the
table should be increased.
• If the lines are laid inside conduits then the following point must also be taken into account when
grouping various lines together for introduction into the conduits.
• Power lines (including power supply to air conditioner) and signal lines must not be laid inside the
same.
• In the same way, when grouping the lines power and signal lines should not be bunched together.

Setting and Using Method
Installation manual 15
Setting of Dip Switch
Using ‘SW101’, ‘SW102’, You can use Low Ambient Kit Mode
Set Low Ambient Kit Operation
L1
ON
234
L1
ON
2
SW102
SW101
Notes
Default status is all off.
CAUTION
• If the Dip SW is set , IO module System is operating preferentially than outdoor unit setting.
• After change Dip SW setting, press reset switch to reflect the setting.
Position Setting of Dip Switch
ON
L1 2 3 4
SW101 - L1=ON
L2=ON
L3=OFF
L4=OFF
ON
L1 2
SW102 - L1=OFF
L2=OFF
3. IO Module - Low Ambient Kit Function

Setting and Using Method
16 Low Ambient Control Kit
Setting of Dip Switch
Using ‘SW101’, select the option of control function as described below.
L1
ON
234
Notes
Default status is all off.
CAUTION
If the Dip SW is set , IO module System is operating preferentially than outdoor unit setting.
CAUTION
After change Dip SW setting, press reset switch to reflect the setting.
Position Function
ON
L1 2 3 4
ON : Enable Low Noise Operation
OFF : Disable Low Noise Operation
Position Function
ON
L1 2 3 4
ON : Activate Digital Output according to Indoor Unit status
OFF : Activate Digital Output according to Outdoor Unit status
• L4 : Set Operating status output
• L3 : Set Low Noise Operation
This is a function driving outdoor unit fan RPM to operate low speed for reducing fan noise
according to the input signal. To use this function, you should set Outdoor unit mode, Please
refer to PDB more detail.
4. IO Module – Other Function

Setting and Using Method
Installation manual 17
L1
ON
2
Notes
Default status is all off.
CAUTION
After change Dip SW setting, press reset switch to reflect the setting.
Position Function
ON
L1 2
ON : Analog output 0V
OFF : Analog output 10V
Position Function
ON
L1 2
ON : Ignore minimum Analog output value setting
(L1,L2 setting value of 4pin Dip SW)
OFF : Follow minimum Analog output value setting
(L1,L2 setting value of 4pin Dip SW)
• L2 : Set Analog output Range
Basically this module keeps a minimum Analog output voltage refer to L1,L2 setting of SW101 to
prevent unexpected accident. When you need to use 0~10V full range, L2 should be set as ON.
• L1 : Set Analog output default value when Communication Error will be occur (Module – ODU)
Using ‘SW102’, set the internal function as described below.

Setting and Using Method
18 Low Ambient Control Kit
Setting of Rotary Switch
Use the Rotary Switch to set a control step for contact signal input : The type of input signal and
control step can be set using ‘SW104’
This function is for demand control to reduce power consumption.
Set the control mode what you want according to the table as below.
CAUTION
Do not change a command too quickly.
Keep the command 30 seconds at least, otherwise it will cause a damage to outdoor unit.
• Operation rate condition :
- Cooling : Outdoor 35 °C, Indoor 27 °C
- Heating : Outdoor 7 °C, Indoor 20 °C
• The tolerance of the operation rate can be cause by combination of outdoor unit, operating
condition, installation circumstance.
• When operation rate is 100%, Target Evaporating Temp. and Target Condensing Temp. can be
changed by installation option. (Refer to product data book)
• Input_1 : 0 Έ OFF, Input_1 : 1 Έ ON
- Type of input signal
SW_STEP Input signal
0, 1, 2, 3, 4, 5, 6, 7 Contact signal input
C, D, E Analog input signal

Setting and Using Method
Installation manual 19
RD RD
Damper
Actuator
AC/DC 24V
IO Module
Transformer
Main PCBPower Module
AC 220V
BR
BL
WH
BK
RD
Terminal
Block
GR
DC 0~10V
Control Signal
5. Wiring for Damper Actuator
Notes
Damper Actuator can accept only DC 24V power input.
Do not input AC power. Otherwise it will cause a serious damage.
The IO Module can control maximum three actuators.
Case of one valve, the slave signal connector must not use.
The power (AC/DC 24V) and signal(DC 0~10V) line is recommended by AWG22(1/32 in, (0.644 mm),
0.016 Ω/ft (0.053 Ω/m)).
1 Unit
❈BL : Blue, BR : Brown, RD : Red, BK : Black, WH : White, GR : Green

Setting and Using Method
20 Low Ambient Control Kit
Damper
Actuator
IO Module
Transformer
Main PCBPower Module
AC 220V
BR
BL
WH
BK
RD
Terminal
Block
GR
GR
RD
WH
BK
RD
RD
BK
RD
Damper
Actuator
Notes
Damper Actuator can accept only DC 24V power input.
Do not input AC power. Otherwise it will cause a serious damage.
The IO Module can control maximum three actuators.
Case of one valve, the slave signal connecter must not use.
The power (AC/DC 24V) and signal(DC 0~10V) line is recommended by AWG22(1/32 in, (0.644 mm),
0.016 Ω/ft (0.053 Ω/m)).
2 Unit