LG PRHR021 INSTALLATION INSTRUCTIONS
INSTALLATION MANUAL
AIR
CONDITIONER
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.
TYPE :
MODELS : PRHR Series(Heat Recovery Unit)
Original instruction
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<![endif]>ЯЗЫК РУССКИЙ PORTUGUESE DEUTSCH FRANCAIS ESPAÑOL ITALIANO ENGLISH
P/NO : MFL32987304
PRHR Series Heat Recovery Unit Manual |
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TABLE OF CONTENTS |
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Safety Precautions ................................................................................................. |
3 |
Features................................................................................................................... |
4 |
Installation Part....................................................................................................... |
4 |
Installation............................................................................................................... |
5 |
Coil Exchanging Method...................................................................................... |
13 |
2 
HR Unit
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
νIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
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Have all electric work done by a licensed electrician according |
Ask the dealer or an authorized technician to install the HR |
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to "Electric Facility Engineering Standard" and "Interior Wire |
unit. |
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Regulations" and the instructions given in this manual and |
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always use a special circuit. |
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• If the power source capacity is inadequate or electric work is per- |
• Improper installation by the user may result in water leakage, elec- |
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formed improperly, electric shock or fire may result. |
tric shock, or fire. |
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Always ground the product. |
Make the connections securely so that the outside force of the |
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cable may not be applied to the terminals. |
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• There is risk of fire or electric shock.
For re-installation of the installed product, always contact a dealer or an Authorized Service Center.
• There is risk of fire, electric shock, explosion, or injury.
Do not store or use flammable gas or combustibles near the HR Unit.
•Inadequate connection and fastening may generate heat and cause a fire.
Do not install, remove, or re-install the unit by yourself (customer).
• There is risk of fire, electric shock, explosion, or injury.
Use the correctly rated breaker or fuse.
• There is risk of fire or failure of product. |
• There is risk of fire or electric shock. |
Do not damage or use an unspecified power cord.
• There is risk of fire, electric shock, explosion, or injury.
Securely install the cover of control box and the panel.
•If the cover and panel are not installed securely, dust or water may enter the HR unit and fire or electric shock may result.
Safely dispose of the packing materials.
Do not touch the power switch with wet hands.
• There is risk of fire, electric shock, explosion, or injury.
Be cautious when unpacking and installing the product.
•Sharp edges could cause injury. Be especially careful of the case edges.
•Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries.
•Tear apart and throw away plastic packaging bags so that children may not play with them. If children play with a plastic bag which was not torn apart, they face the risk of suffocation.
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Avoid a place where rain may enter since the HR unit is |
Install the HR unit at a place in which it is not affected |
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for indoor. |
by operation mode changing noise. |
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• There is risk of property damage, failure of product, or elec- |
• Installation within cell such as meeting room etc. may dis- |
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tric shock. |
turb business due to noise. |
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Always check for gas (refrigerant) leakage after installa- |
Keep level even when installing the product. |
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tion or repair of product. |
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• Low refrigerant levels may cause failure of product. |
• To avoid vibration or water leakage. |
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<![endif]>ENGLISH
Installation Manual 3
Features & Installation Part
Features
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Connection Pipe |
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Control Box |
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(to outdoor unit) |
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Coil assembly, Solenoid |
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Connection Pipe |
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(to outdoor unit) |
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Connection Pipe |
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(to indoor unit) |
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Model |
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PRHR021 |
PRHR031 |
PRHR041 |
Max. Connectable No. of Indoor Units |
16 |
24 |
32 |
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Max. Connectable No. of Indoor Units of a branch |
8 |
8 |
8 |
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Nominal Input |
Cooling |
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26 |
40 |
40 |
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Heating |
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26 |
40 |
40 |
Net. Weight |
kg |
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18 |
20 |
22 |
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lbs |
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39.7 |
44.1 |
48.5 |
Dimensions |
mm |
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801x218x617 |
801x218x617 |
801x218x617 |
(WxHxD) |
Inch |
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31.5x8.6x24.3 |
31.5x8.6x24.3 |
31.5x8.6x24.3 |
Casing |
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Galvanized steel plate |
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Connecting Pipes |
Indoor |
Liquid Pipe [mm/inch] |
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Ø9.52[3/8] |
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side |
Gas Pipe [mm/inch] |
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Ø15.88[5/8] |
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Outdoor |
Liquid [mm/inch] |
Ø9.52[3/8] |
Ø12.7[1/2] |
Ø15.88[5/8] |
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side |
Low Pressure [mm/inch] |
Ø22.2[7/8] |
Ø28.58[1-1/8] |
Ø28.58[1-1/8] |
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High Pressure [mm/inch] |
Ø19.05[3/4] |
Ø22.2[7/8] |
Ø22.2[7/8] |
Sound Absorbing Insulation Material |
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Polyethylene Foam |
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Current |
Minimum circuit Amps(MCA) |
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0.2 |
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Power Supply |
Maximum fuse Amps(MFA) |
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15 |
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1Ø, 220-240V, 50Hz / 1Ø, 220V, 60Hz |
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Installation Part
•Installation Manual
•Hanging bolts (4 x M10 or M8, Nut(8 x M10 or M8), Flat washers(8 x M10)
•Reducers
Models |
Liquid pipe |
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Gas pipe |
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Low pressure |
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High pressure |
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Indoor unit |
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reducer |
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OD9.52 Ø6.35 |
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OD15.88 |
Ø12.7 |
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PRHR021 |
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OD19.05 |
Ø15.88 |
Ø12.7 |
OD22.2 |
Ø19.05 |
Ø15.88 |
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OD9.52 Ø6.35 |
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OD12.7 |
Ø9.52 |
OD15.88 |
Ø12.7 |
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HR unit |
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reducer |
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PRHR031/ |
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OD22.2 |
Ø19.05 |
Ø15.88 |
OD28.58 |
Ø22.2 |
Ø19.05 |
PRHR041 |
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OD15.88 |
Ø12.7 |
Ø9.52 |
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OD15.88 |
Ø12.7 |
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OD19.05 |
Ø15.88 |
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4 
HR Unit
Installation
Installation
Selection of the best location
νSelect installation location of the HR unit suitable for following conditions
•Avoid a place where rain may enter since the HR unit is for indoor.
•Sufficient service space must be obtained.
•Refrigerant pipe must not exceed limited length.
•Avoid a place subject to a strong radiation heat from other heat source.
•Avoid a place where oil spattering, vapor spray or high frequency electric noise is expected.
•Install the unit at a place in which it is not affected by operation noise. (Installation within cell such as meeting room etc. may disturb business due to noise.)
•Place where refrigerant piping, drain piping and electrical wiring works are easy.
Dimensional drawings
481 |
<![if ! IE]> <![endif]>space) |
7 |
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<![if ! IE]> <![endif]>(Servicing |
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300 more |
300 more |
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(**)(Servicing space) |
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(**)(Servicing space) |
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3 |
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<![if ! IE]> <![endif]>(Servicing space) |
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<![if ! IE]> <![endif]>100 more |
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(*) Inspection door (servicing space)
450 |
300 more |
450 more |
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(**)(Servicing space) |
(Servicing space) |
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124 |
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4 |
5 |
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218 |
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182 |
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182 |
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60 |
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6 |
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(174) |
453 |
(174) |
61 |
419 |
(137) |
30 |
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(Unit: mm) |
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No. |
Part Name |
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Description |
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PRHR041/031 |
PRHR021 |
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1 |
Low pressure Gas pipe connection port |
Ø28.58 Brazing connection |
Ø22.2 Brazing connection |
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2 |
High pressure Gas pipe connection port |
Ø22.2 Brazing connection |
Ø19.05 Brazing connection |
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3 |
Liquid pipe connection port |
Ø15.88 Brazing connection(PRHR041) |
Ø9.52 Brazing connection |
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Ø12.7 Brazing connection(PRHR031) |
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4 |
Indoor unit Gas pipe connection port |
Ø15.88 Brazing connection |
Ø15.88 Brazing connection |
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5 |
Indoor unit Liquid pipe connection port |
Ø9.52 Brazing connection |
Ø9.52 Brazing connection |
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6Control box
7 Suspension bolts |
M10 or M8 |
M10 or M8 |
NOTES
* Be sure to install the inspection door at the electric control side.
** If reducers are used, servicing space must be increased equal to reducer's dimension.
<![endif]>ENGLISH
Installation Manual 5
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