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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.
Original instruction
P/NO : MFL32987316
www.lg.com
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Summary of Contents for LG MULTI V PRHR022
- Page 1 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. Original instruction www.lg.com P/NO : MFL32987316...
- Page 2 TIPS FOR SAVING ENERGY TIPS FOR SAVING ENERGY Here are some tips that will help you minimize the power consumption when you use the air conditioner. You can use your air conditioner more efficiently by referring to the instructions below: •...
- Page 3 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 •...
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Page 4: Important Safety In- Structions
IMPORTANT SAFETY INSTRUCTIONS IMPORTANT SAFETY IN- • For re-installation of the installed product, always contact a dealer or an Authorized Service Center. STRUCTIONS - There is risk of fire, electric shock, explosion, or injury. READ ALL INSTRUCTIONS BEFORE • Do not install, remove, or re-install the unit by your- self (customer). -
Page 5: Table Of Contents
TABLE OF CONTENTS TABLE OF CONTENTS TIPS FOR SAVING EN- ERGY IMPORTANT SAFETY IN- STRUCTIONS FEATURES INSTALLATION PART INSTALLATION Selection of the best location Dimensional drawings HR Unit Installation Insulation Wiring Connection Setup the switch of HR Unit COIL EXCHANGING METHOD JOINT METHOD OF HR UNIT... -
Page 6: Features
FEATURES FEATURES Connection Pipe (to outdoor unit) Control Box Coil assembly, Solenoid Connection Pipe (to outdoor unit) Connection Pipe (to indoor unit) Model PRHR022 PRHR032 PRHR042 Max. Connectable No. of Indoor Units Max. Connectable No. of Indoor Units of a branch Cooling Nominal Input Heating... -
Page 7: Installation Part
INSTALLATION PART INSTALLATION PART - Installation Manual - Hanging bolts (4 x M10 or M8, Nut(8 x M10 or M8), Flat washers(8 x M10) - Reducers [Unit : mm] Gas pipe Models Liquid pipe High pressure Low pressure OD22.2(7/8) Ø19.05(3/4) Ø15.88(5/8) OD19.05(3/4) Ø15.88(5/8) Ø12.7(1/2) PRHR022... -
Page 8: Installation
INSTALLATION INSTALLATION Selection of the best location Select 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. - Page 9 INSTALLATION [Unit : mm] Description Part Name PRHR032/PRHR042 PRHR022 Low pressure Gas pipe con- Ø28.58 Brazing connection Ø22.2 Brazing connection nection port High pressure Gas pipe con- Ø22.2 Brazing connection Ø19.05 Brazing connection nection port Ø15.88 Brazing connec- tion(PRHR042) Liquid pipe connection port Ø9.52 Brazing connection Ø12.7 Brazing connection(PRHR032)
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Page 10: Hr Unit Installation
INSTALLATION HR Unit Installation Using an insert-hole-in- anchor, hang the suspension bolt. - Select and mark the position for fixing bolts. Install a hexagon nut and a flat washer (lo- - Drill the hole for set anchor on the face of cally-procured)to the suspension bolt as ceiling. - Page 11 INSTALLATION CAUTION HR Unit should be installed that top side is facing up. If not, it may cause failure of the prod- uct. Ceiling Top side Top side Top side WARNING Before brazing work, remove gas in the HR Unit by cutting the three pipes in the small cir- cles on the figure.
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Page 12: Insulation
INSTALLATION Insulation Insulate the connected pipes completely(all thermal insulation must comply with local require- ment) Make sure that there is no clearance here Thermal insulator for refrigerant pipe(Local supply) Refrigerant pipe (Local supply) Overlap with thermal Thermal insulator for refrigerant pipe insulator for piping (Local supply) CAUTION... -
Page 13: Wiring Connection
INSTALLATION Wiring Connection Connect the wires to the terminals on the control board individually according to the outdoor unit connection. - Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of HR Unit respectively. -
Page 14: Setup The Switch Of Hr Unit
INSTALLATION Setup the switch of HR Unit Main function of SW02M SW02M ON S/W Selection No.1 Method for pipe detection of an HR unit (Auto/Manual) No.2 Model of HR unit No.3 Model of HR unit No.4 Model of HR unit No.5 Valve group setting No.6... - Page 15 INSTALLATION 3) Selection of the model of the HR unit (For 2 branches) (For 3 branches) (For 4 branches) PRHR022 PRHR032 PRHR042 Initial Setting 1 branch Connected 2 branches Connected 3 branches Connected 4 branches Connected ❈ Each model is shipped with the switches No.2 and No.3 pre-adjusted as above in the factory. WARNING •...
- Page 16 INSTALLATION 4) Setting the Valve Group DIP S/W setting Example Indoor Unit Indoor Unit Not control Indoor Unit Indoor Unit Indoor Unit No.1, 2 Valve Indoor Unit Large capacity indoor unit Control Indoor Unit No.2, 3 Valve Large capacity indoor unit Control Indoor Unit Large capacity indoor unit...
- Page 17 INSTALLATION SW05M (Rotary S/W for addressing HR unit) Must be set to '0' when installing only one HR unit. When installing multiple HR units, address the HR units with sequentially increasing numbers starting from '0'. Maximum 16 HR Units can be installed. Ex) Installation of 3 HR units SW01M/SW03M/SW04M (Dip S/W and tact S/W for manual valve addressing)
- Page 18 INSTALLATION 2) Zoning setting - Set the address of the valve of the HR unit to the central control address of the connected in- door unit. - SW01M : selection of the valve to address SW03M : increase in the digit of 10 of valve address SW04M : increase in the last digit of valve address SW05M :Rotary S/W - Prerequisite for manual valve addressing : central control address of each indoor unit must be...
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Page 19: Coil Exchanging Method
COIL EXCHANGING METHOD COIL EXCHANGING METHOD Remove the 2 securing screws. Take out the connectors on the pcb. Remove the cover by pulling on the bottom Remove the 4 securing screws. of the cover and lifting up. Lay down the control box. Remove the 4 securing screws. -
Page 20: Joint Method Of Hr Unit
JOINT METHOD OF HR UNIT JOINT METHOD OF HR UNIT Joint Method is required when use indoor unit that exceed 54k is installed. In Joint Method, two neighboring outlets of one HR unit are linked by Y branch pipe and connected to one indoor unit. HR Unit HR Unit (96k)
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