LG Multi V PRHR041, PRHR041A, Multi V PRHR031A, Multi V PRHR031, Multi V PRHR021 Service Manual
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Heat Recovery Unit
SERVICE MANUAL
(Exploded View)
MODEL : PRHR041/PRHR041A
PRHR031/PRHR031A
PRHR021/PRHR021A
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com
R410A
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Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. Specifications ..................................................................................................................3
2. Parts Functions ...............................................................................................................4
3. Dimensions ......................................................................................................................5
4. Piping Diagrams ..............................................................................................................6
5. Wiring Diagrams..............................................................................................................7
6. Electric Characteristics ..................................................................................................8
7. Exploded View .................................................................................................................9
TABLE OF CONTENTS
Specifications
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Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. Specifications
1.1 HR Unit
Notes:
1. Voltage range : Units are suitable for sue on electrical systems where voltage supplied to units terminals is not below or
above listed range limits.
2. Maximum allowable voltage unbalance between phases is 2%
Model
Max. Connectable No. of Indoor Units
Max. Connectable No. of Indoor Units of a branch
Net. Weight kg
lbs
Dimensions mm
(WxHxD) Inch
Casing
Connecting Pipes Indoor Liquid Pipe [mm/inch]
Gas Pipe [mm/inch]
Outdoor Liquid [mm/inch]
Low Pressure [mm/inch]
High Pressure [mm/inch]
Sound Absorbing Insulation Material
Power Supply
PRHR021/PRHR021A PRHR031/PRHR031A PRHR041/PRHR041A
16 24 32
888
18 20 22
39.7 44.1 48.5
801x218x617 801x218x617 801x218x617
31.5x8.6x24.3 31.5x8.6x24.3 31.5x8.6x24.3
Galvanized steel plate
Ø9.52[3/8]
Ø15.88[5/8]
Ø9.52[3/8] Ø12.7[1/2] Ø15.88[5/8]
Ø22.2[7/8] Ø28.58[1 1/8] Ø28.58[1 1/8]
Ø19.05[3/4] Ø22.2[7/8] Ø22.2[7/8]
Polyethylene Foam
1Ø, 220-240V, 50Hz / 1Ø, 220V, 60Hz(PRHR041, PRHR031, PRHR021)
1Ø, 208/230V, 60Hz(PRHR041A, PRHR031A, PRHR021A)
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Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Parts Functions
Prevent liquid chargingLBVLiquid bypass valve
Control the subcoolingSCEEVSubcooling EEV
Control the pressure between High and Low
pressure pipe during operation switching
BLVBalancing valve
Gas pipe connected with indoor unitGSPGas pipe
Liquid pipe connected with indoor unitLP2Liquid pipe 2
Control the path for heating or coolingSOL1, 2Solenoid assembly 1, 2
Liquid pipe connected with outdoor unitLP1Liquid pipe 1
Pipe for high pressure gasHPGVHigh pressure gas pipe
Pipe for low pressure gasLPGVLow pressure gas pipe
Major functionSymbolParts name
Balancing valve
Low pressure gas pipe
High pressure gas pipe
Liquid bypass valve
Solenoid assembly 1
Solenoid assembly 2
Liquid pipe1
Gas pipe
Liquid pipe2
Subcooling EEV
2. Parts Functions
2.1 Parts Functions
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