LG PRARH1 User Manual
www.lg.com
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
P/NO : MFL65920007
ENGLISH
2 Auxiliary Heater Relay Kit
IMPORTANT!
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.
WARNING
• 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.
CAUTION
Safety Precautions
NOTE TO INSTALLING DEALER: The Owners Instructions and Warranty are to be given to the owner
: 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.
• Always wear safety eye wear and work gloves when installing equipment.
• Never assume electrical power is disconnected. Check with meter and equipment.
or prominently displayed near the indoor Furnace/Air Handler Unit.
WARNING
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.
... in a room: Properly insulate any tubing run inside a room to prevent "sweating" that can cause
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.
It may be necessary to construct a strong wood or metal frame to provide added support.
dripping and water damage to wall and floors.
Installation Manual 3
Auxiliary Heater Relay Kit INSTALLATION MANUAL
TABLE OF CONTENTS
1. Safety Precautions ............................................................................................................4
2. Included Items....................................................................................................................5
3. Assembly Diagram ............................................................................................................6
4. Electrical Wiring...............................................................................................................12
5. Installer Setting................................................................................................................14
6. Troubleshooting Guide ...................................................................................................17
4 Auxiliary Heater Relay Kit
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.
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
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
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. (However, be sure to use all
kinds of certified products when purchasing 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.)
CAUTION
1. Safety Precautions
Safety Precautions
Installation Manual 5
ENGLISH
Item Auxliary Heater Relay Kit Screw Insulation Installation Manual
Q’ty 1 2 2 1
Model
2. Included Items
• PRARH1 applies to High Static Duct, Low Static Duct, 1Way CST, 2Way CST, 4Way CST and Ceiling
Suspended types.
(Unit : inch)
Figure
PRARH1
Included Items
1-13/32
1-7/16
2-19/32
2-19/32
7-9/32
6-23/32
3-13/32
2-7/32
Aux heater
communication lines
6 Auxiliary Heater Relay Kit
Assembly Diagram
Check the distance between PRARH1 and a control box
when connecting anchor bolts.
9/16
Auxiliary Heater communication lines
(under AC24V,over AWG24)
These wires should not make
contact with high voltage lines.
To indoor unit PCB
(CN-PTC)
AB AB
Fig. A
Control box cover
screw
Insulation
3. Assembly Diagram
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. Step4. Assemble control box cover.
Assembly Diagram - PRARH1
(Unit : inch)
CAUTION
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