ENGLISH
Auxiliary Heater Relay Kit (for Multi V Product)
PRARH1
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.
INSTALLATION MANUAL
AIR
CONDITIONER
MFL65920007
Rev.00_031820
www.lg.com
Copyright © 2017 - 2020 LG Electronics Inc. All Rights Reserved.
ITALIANO
ESPAÑOL
FRANÇAIS
DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ
РУССКИЙ ЯЗЫК
УКРАÏНСЬКА
ҚАЗАҚ ТІЛІ
БЕЛАРУСКАЯ МОВА
O‘ZBEK TILI
2 Auxiliary Heater Relay Kit
IMPORTANT!
CAUTION : Improper installation, adjustment, alteration, service or maintenance can void the warranty.
The weight of the condensing unit requires caution and proper handling procedures when lifting
or moving to avoid personal injury. Use care to avoid contact with sharp or pointed edges.
Safety Precautions
• Always wear safety eye wear and work gloves when installing equipment.
• Never assume electrical power is disconnected. Check with meter and equipment.
NOTE TO INSTALLING DEALER : The Owners Instructions and Warranty are to be given to the owner
or prominently displayed near the indoor Furnace/Air Handler Unit.
When wiring:
Electrical shock can cause severe personal injury or death. Only a qualified,
experienced electrician should attempt to wire this system.
• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.
• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.
• Ground the unit following local electrical codes.
• Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.
When installing...
... in a wall: Make sure the wall is strong enough to hold the unit's weight.
It may be necessary to construct a strong wood or metal frame to provide added support.
... in a room: Properly insulate any tubing run inside a room to prevent "sweating" that can cause
dripping and water damage to wall and floors.
When servicing
• Turn the power OFF at the main power box(mains) before opening the unit to check or repair
electrical parts and wiring.
• Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have
been left inside the unit being serviced.
Please read this instruction sheet completely before installing the product.
This air conditioning system meets strict safety and operating standards. As the installer or service person,
it is an important part of your job to install or service the system so it operates safely and efficiently.
• Installation must adapt with local building codes or with the Nation al Electrical code NFPA 70/ANSI C1-1993 (or
current edition ) along with Canadian Electrical Code Part1 CSA C.22.1
• 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.
WARNING
WARNING
Table of Contents
Installation Manual 3
ENGLISH
4 SAFETY PRECAUTIONS
6 INCLUDED ITEMS
7 ASSEMBLY DIAGRAM
7 Assembly Diagram - PRARH1
13 ELECTRICAL WIRING
15 INSTALLER SETTING
16 External devices of indoor unit setting (air conditioner)
17 Outdoor temp. for heating stages (air conditioner)
18 TROUBLESHOOTING GUIDE
TABLE OF CONTENTS
4 Auxiliary Heater Relay Kit
Safety Precautions
To prevent injury to the user or other people and property damage,
the following instructions must be followed.
n Incorrect operation due to ignoring instruction will cause harm or
damage. The seriousness is classified by the following indications.
WARNING
1. Electric works should be carried out according to ‘The technology
requirement on the electric installation’, The wiring standard and this
manual by a qualified personnel.
2.
If the installation is not complete, electric shock or fire may occur, or death
or injury can be caused.
3. If the capacity of the power circuit is insufficient or its installation was
not done completely, this may cause electric shock, fire or etc..
4. If the installation was done by a user, there may be incompleteness,
which may cause electric shock, fire, injury and death.
5. When operating the machine (applying power to the machine), do
not carry out any electric work and do not put hand or finger into it.
This may cause electric shock, injury and death.
6. Use only UL1996 approved heater.
!
n Meanings of symbols used in this manual are as shown below.
WARNING
This symbol indicates the possibility of death or serious injury.
CAUTION
This symbol indicates the possibility of injury or damage.
!
!
Be sure not to do.
Be sure to follow the instruction.
1. Safety Precautions
Safety Precautions
Installation Manual 5
ENGLISH
CAUTION
1. Before installation, read this manual and carry out the works
according to it.
2. Before installation, be sure to check all the included items. (How-
ever, be sure to use all kinds of certified products when purchas-
ing the items other than those provided by LG at your local store.)
3. Be sure to carry out the earth work. (However, do not connect the
unit to gas pipe, water pipe, a lightning rod and a phone earth line.
In addition, if the earth was not completely done, this may cause
electric shock and fire.)
!
6 Auxiliary Heater Relay Kit
Included Items
2. Included Items
• PRARH1 applies to High Static Duct, Low Static Duct, 1Way CST, 2Way CST, 4Way CST and Ceiling
Suspended types.
(Unit : inch)
2-19/32
1-13/32
7-9/32
6-23/32
2-19/32
2-7/32
1-7/16
3-13/32
Model
PRARH1
Item Auxliary Heater Relay Kit
Screw Insulation Installation Manual
Q’ty
1 2 2 1
Figure
Assembly Diagram
Installation Manual 7
ENGLISH
Aux heater
communication lines
9/16
AB AB
Fig. A
Control box cover
screw
Insulation
n High Static Duct
※
Wiring
Note: While connecting the PRARH1, attach insulation at the rear of the control box cover
where it receives screws as shown in Fig. A.
Please clean up the remaining wires after installation.
Step1. Open control box cover.
Step2. Assemble PRARH1 with control box cover.
Step3. Open the cover of PRARH1 and connect wires.
Auxiliary Heater communication lines
(under AC24V,over AWG24)
These wires should not make
contact with high voltage lines.
Check the distance between PRARH1 and a control box
when connecting anchor bolts.
To indoor unit PCB
(CN-PTC)
Step4. Assemble control box cover.
(Unit : inch)
Assembly Diagram - PRARH1
3. Assembly Diagram
CAUTION
!
8 Auxiliary Heater Relay Kit
Assembly Diagram
n Low Static Duct
4 13/32
Fig. A
Control box cover
screw
Insulation
Note: While connecting the PRARH1, attach insulation at the rear of the control box cover
where it receives screws as shown in Fig. A.
Please clean up the remaining wires after installation.
Check the distance between PRARH1
and the top of model when connecting
anchor bolts.
AB AB
※
Wiring
Auxiliary Heater communication lines
(under AC24V,over AWG24)
These wires should not make
contact with high voltage lines.
To indoor unit PCB
(CN-PTC)
Aux heater communication lines
Step1. Open control box cover.
Step2. Assemble PRARH1 with control box cover.
Step3. Open the cover of PRARH1 and connect wires.
Step4. Assemble control box cover.
(Unit : inch)
CAUTION
!
Assembly Diagram
Installation Manual 9
ENGLISH
AB AB
n 1 Way CST
Aux heater
communication
lines
Step1. Open control front panel. Step2. Assemble PRARH1 with cabinet.
Step3. Open the cover of PRARH1 and connect wires.
Step4. Assemble control box cover and front panel.
Fig. A
Control box cover
screw
Insulation
Note: While connecting the PRARH1, attach insulation at the rear of the control box cover
where it receives screws as shown in Fig. A.
Please clean up the remaining wires after installation.
※
Wiring
Auxiliary Heater communication lines
(under AC24V,over AWG24)
These wires should not make
contact with high voltage lines.
To indoor unit PCB
(CN-PTC)
10 Auxiliary Heater Relay Kit
Assembly Diagram
n 2 Way CST
Aux heater
communication
lines
Step1. Open control front panel. Step2. Assemble PRARH1 with cabinet.
Step3. Open the cover of PRARH1 and connect wires.
Step4. Assemble control box cover and front panel.
Fig. A
Control box cover
screw
Insulation
Note: While connecting the PRARH1, attach insulation at the rear of the control box cover
where it receives screws as shown in Fig. A.
Please clean up the remaining wires after installation.
AB AB
※
Wiring
Auxiliary Heater communication lines
(under AC24V,over AWG24)
These wires should not make
contact with high voltage lines.
To indoor unit PCB
(CN-PTC)
Assembly Diagram
Installation Manual 11
ENGLISH
n 4 Way CST
Step1. Open control front panel. Step2. Assemble PRARH1 with cabinet.
Step3. Open the cover of PRARH1 and connect wires.
Step4. Assemble control box cover and front panel.
Fig. A
Control box cover
screw
Insulation
Note: While connecting the PRARH1, attach insulation at the rear of the control box cover
where it receives screws as shown in Fig. A.
Please clean up the remaining wires after installation.
Check the attached direction to the indoor unit.
AB AB
※
Wiring
Auxiliary Heater communication lines
(under AC24V,over AWG24)
These wires should not make
contact with high voltage lines.
To indoor unit PCB
(CN-PTC)
CAUTION
!
12 Auxiliary Heater Relay Kit
Assembly Diagram
n Ceiling Suspended
D < 3.3 ft
Step1. Mount relay kit on the wall. Step2. Connect wires and assemble cover.
CAUTION
Do not install PRARH1 at,
- Places which exposed to rain or any water.
Other wise it may leads to electric shock, fire, injury or sometimes even fatality.
!
CAUTION
!
AB AB
※
Wiring
Auxiliary Heater communication lines
(under AC24V,over AWG24)
These wires should not make
contact with high voltage lines.
To indoor unit PCB
(CN-PTC)
Auxiliary heater relay kit should be installed with in 3.3 ft from the product.
Otherwise heater may cause malfunction.
Aux heater
communication
lines
Note: Please clean up the remaining wires after installation.
Electrical Wiring
Installation Manual 13
ENGLISH
AB AB
Auxiliary Relay Kit
Indoor Unit
RADIATOR
Hot Water
LG Scope
3
rd
Party Scope
External Power supply
- Supply voltage : AC 24V
Hot Water
RADIATOR
DC12V
CN_PTC
CN_PTC1
4. Electrical Wiring
14 Auxiliary Heater Relay Kit
Electrical Wiring
Model : PREMBTB100
AB AB
Auxiliary Relay Kit
Indoor Unit
RADIATOR
Hot Water
LG Scope
3
rd
Party Scope
External Power supply
- Supply voltage : AC 24V
DC12V
CN_PTC
CN_PTC1
Installer Setting
Installation Manual 15
ENGLISH
• In the menu screen, press [<,>(left/right)] button to select the setting category, and press [
∧
(up)]
button for 3 seconds to enter the password input screen for the installer setting.
• Input the password and press [OK] button to move to the installer setting list.
※Installer setting password
Main screen → menu → setting → service → RMC version information → SW Version
Example) SW version : 1.00.1 a
In the above case, the password is 1001.
Note: Some categories of the installer setting menu may not be available depending on the product function
or the menu name may be different.
OK OK
CAUTION
The installer setting mode is the mode to set the remote controller’s detail function. If the installer
setting mode is incorrectly set, it may cause product failure, user’s injury, or property damage. It
must be set by the installation specialist with the installation license, and if it is installed or
changed without installation license, all problems caused will be the responsibility of the installer,
and may void the LG warrenty.
!
If you want to operate Auxiliary Heater Relay Kit, you should have Wired or Wireless Remote Con-
troller below.
5. Installer Setting
16 Auxiliary Heater Relay Kit
Installer Setting
At the Code field, select when air cleaner/heater/humidifier/elevation grill/ventilation KIT/Aux
Heater/refrigerant leakage detection sensor are newly installed to the indoor unit or when an
installed KIT is removed.
• You can set the following setting values using [<,>(left/right)] button.
Function Value
Plasma purification
Not install / Install
Heater
Humidifier
Elevation grill
Ventilation Kit
Aux Heater
Refrigerant leakage detection sensor
External devices of indoor unit setting (air conditioner)
Installer Setting
Installation Manual 17
ENGLISH
It is a function that sets outdoor temperature values for two stage heating.
if user set outdoor temperature T1 and T2, Indoor unit will select heating stage between Indoor unit
operation and heater operation.
T<= T1 : Auxiliary heater operation only
T1<T<T2 : Simultaneous operation of auxiliary heater and heat pump
T>=T2 : Heat pump operation only
OK
T1 Value T2 Value
-23 ~ 16 °C (-10 ~ 60 °F) -23 ~ 51 °C (-10 ~ 130 °F)
Outdoor temp. for heating stages (air conditioner)
18 Auxiliary Heater Relay Kit
Troubleshooting Guide
Symptom Check Action
AUX
HEATER
does not
work.
Is air conditioner power turned
on?
- Check the circuit breaker.
- Check the AUX HEATER RELAY KIT
installation status.
Is the cable correctly connected
beteween the air conditioner
andAUX HEATER RELAY KIT?
- Connect the cable between the air condi-
tioner and AUX HEATER RELAY KIT.
Is the cable correctly connected
between AUX HEATER and
AUX HEAER REWLAY KIT?
- Refer to the installation method in the
installation manual and check again.
Is there any problem with wireless
remote controller?
(If wireless remote controller is
used)
- Replace the battery or insert again accord-
ing to the polarity(+,-).
- If there is a leakage of the battery fluid in
the remote controller, replace the battery.
6. Troubleshooting Guide
/