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LG PRCKA0, Installation Manual, Page: 1 / 27

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LG 
AHU Control Kit / EEV Kit 

Installation Manual

LG

IMPORTANT

• 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.

Visit us at : http://www.lgservice.com

Models:

PRCKA0
PRLK048A0

ENGLISH

Summary of Contents for PRCKA0

Page 1: ...etely 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 Visit us at http www lgservice com Models PRCKA0 PRLK048A0 ENGLISH ...

Page 2: ...Kit PRCKA0 7 EEV Kit PRLK048A0 8 Before Installation 9 EEV Kit Installation 11 Mechanical installation 11 12 Brazing work 13 14 Electrical work 15 Control Kit Installation 16 Mechanical installation 16 Electric wiring work 17 19 Dry contact connection_optional accessory 20 Thermistors Installation 21 Pipe thermistors installation 21 23 Room thermistor 24 Test Operation 25 Troubleshooting 26 ...

Page 3: ...ere is risk of fire or electric shock Be cautious that water could not enter the product There is risk of fire electric shock or product damage Operation Use the correctly rated breaker or fuse There is risk of fire or electric shock Do not install remove or re install the unit by yourself customer There is risk of fire electric shock explosion or injury For installation always contact the dealer ...

Page 4: ...Kit PRLK048A0 Field piping Field supply Multi_V Field supply Parts and components 6 7 8 9 10 Control kit wiring Pipe thermistors EBG36949304 EBG36949305 Room thermistor EBG36949303 Remote controller PQRCUSA0 Dry contact PCB PQDSBNGCM0 Power supply and communication between control kit and outdoor unit Evaporator In Out control of Air Handling Unit Return air control Optional accessory Optional acc...

Page 5: ...tting option PCB AJT57850901 EBG36949303 EBG36949304 black EBG36949305 red MFL50024801 EBR52358907 09 10 11 12 P NO Shape PRCKA0 W D H Components Quantity EA 1 1 AHU EEV Kit Installation manual AJT57850801 MFL50024801 P NO Shape PRLK048A0 W D H Model Name Weight kg Dimension mm POWER NET Gross W H D PRCKA0 2 2 3 6 280 135 280 220 240V 50Hz 1Phase PRLK048A0 3 1 3 6 404 83 217 ...

Page 6: ...Accessories Optional Accessories Components Remote controller Dry contact PCB PQRCUSA0 PQDSBNGCM0 Model name Shape Accessories For further details of the accessories refer to the manual provided at the time of purchasing the accessories ...

Page 7: ...7 11 9 8 10 12 6 CN OPTION 1 2 3 4 5 6 7 8 9 10 11 12 Plastic bolt Control box cover Main PCB Option PCB 36k Main PCB case Terminal block communication Terminal block POWER Supply Panel Support Tie wrap Control box case Cable gland 2type Bracket 4 1 1 1 1 1 1 1 8 1 8 4 No Part Name Quantity EA ...

Page 8: ...Part Description EEV Kit PRLK048A0 1 2 5 3 4 4 8 7 6 1 2 3 4 5 6 7 8 Panel upper Bracket Terminal box Cable gland Insulator tube EEV assembly EEV Strainer Tube Support tie wrap Panel base 1 2 1 2 1 1 1 1 No Part Name Quantity EA ...

Page 9: ...ng mode AHU Field supply must comply with the following details Following The insulation level of AHU Field supply motor must be F or above and the protection level must satisfy IP 54 AHU Field supply must have the drain pan installed Fan speed button on the wired remote controller PQRCUSA0 is not operated For refrigerant piping of outdoor unit refer to the installation manual supplied with the ou...

Page 10: ...CB equipped in the main PCB and set up the Option PCB fitted the need capacity in the main PCB CAUTION Saturated Suction Temperature SST 6 C SH Superheat 5K Air Temperature 27 C DB 19 C WB Main PCB EBR52358907 28K 0 88 1 08 7 9 22 26 EBR52358908 36k 0 88 1 08 9 11 25 32 EBR52358909 42k 0 88 1 08 11 13 31 35 EBR52358910 48k 1 23 1 51 13 16 33 45 EBR52358911 76k 1 93 2 35 20 24 50 64 EBR52358912 96k...

Page 11: ...ation 1 Remove the EEV Kit box cover by unscrewing the screw 4EA 2 Drill 4 holes on correct position and fix the EEV Kit box securely with 4 screws Field supply through the provided holes Ø6 mm Reference the length of the holes Ø6 190 mm Provided holes Ø6 mm 4EA Pipe size Ø12 7 mm 1 2 338 mm ...

Page 12: ...Inlet coming from the outdoor unit B Outlet to evaporator C Pipe fixing bracket 2EA D Pipe insulation E EEV Assembly F Field pipe Inlet Outlet E D C 2EA F F B A Make sure to cool the filters and EEV body with a wet cloth and make sure the body temperature does not exceed 120 C during brazing Make sure that the other parts such as electrical box tie wraps and wires protected from direct brazing fla...

Page 13: ...r pealing off the liner 8 Secure the pipe fixing bracket C 2EA in place again 4 x M4 9 Make sure that field pipes are fully insulated Field pipe insulation must reach up to the insulation you have put back in place as per procedure step 7 Make sure that there is no gap between both ends in order to avoid condensation dripping finish the connection with tape eventually Liner Fold ...

Page 14: ...e piping nitrogen must be set to 0 02 MPa with a pressure reducing valve just enough so that it can be felt on the skin CAUTION The leakage test is executed by pressurizing nitrogen gas up to 3 8MPa 38 7kgf cm2 The test must be done with the service valve of the outdoor unit closed and the gas must be pressurized at the liquid pipe gas pipe and high low pressure common pipe of the outdoor unit and...

Page 15: ...s NOTE 1 BR BROWN 2 RD RED 3 BL BLUE 4 OR ORANGE 5 YL YELLOW 6 WH WHITE A B D E B R R D B L O R Y L W H EEV C Detail E 12 Use a screwdriver and follow indicated instructions for connecting cable wires into the terminal connector according to the circuit diagram 13 Make sure that field wiring and insulation is not squeezed when closing the EEV Kit box cover 14 Close the EEV Kit box cover 4 x M4 B R...

Page 16: ...allation 1 Remove the Control Kit box cover by unscrewing the plastic bolt 4EA 2 Drill 4 holes on correct position and fix the Control Kit box securely with 4 screws Field supply through the provided holes Ø4 5 mm Reference the length of the holes Ø4 5 298 mm Provided holes Ø4 5 mm 4EA 189 mm ...

Page 17: ...N CONNECTION BETWEEN INDOOR AND OUTDOOR CN ROOM ROOM SENSOR ROOM AIR THERMISTOR CN PIPE IN SUCTION PIPE SENSOR PIPE IN THERMISTOR CN PIPE OUT DISCHARGE PIPE SENSOR PIPE OUT THERMISTOR CN REMO REMOTE CONTROLLER REMOTE CONTROL LINE CN FLOAT FLOAT SWITCH INPUT FLOAT SWITCH SENSING CN EEV EEV OUTPUT EEV CONTROL OUTPUT CN OPTION OPTION PCB COMMUNICATION BETWEEN MAIN AND OPTION CN CC DRY CONTACT DRY CON...

Page 18: ...EEV Kit DRY contact No Electric wire Control Kit Installation Electric Wiring Work 2 For connection to outdoor unit and to controller Field supply Pull the wires inside through the cable gland and close that s nut firmly in order to ensure a good pull relieve and water protection 3 The wires require an additional pull relief Strap the wire with the support tie wrap Support tie wrap Nut of cable gl...

Page 19: ...orized electrician A main switch or other means for disconnection having a contact separation in all poles must be incorporated in the fixed wiring in accordance with relevant local and national legislation Refer to the installation manual attached to the outdoor unit for the size of power supply electric wire connected to the outdoor unit the capacity of the circuit breaker and switch wiring and ...

Page 20: ...ration CN_OUT Dry Contact PCB Dry Contact PCB Dry contact PCB Signal CN_Ther Per Field work Dry contact installation location Applicable dry contact model PQDSBNGCM0 1 Using screw 4EA fix the dry contact on the side panel 2 Using cable connect the dry contact to main PCB For more information please refer to dry contact installation manual ...

Page 21: ...behind the distributor on the coldest pass the heat exchanger contact your heat exchanger dealer 2 Pipe_Out EBG36949305 Install the thermistor at the outlet of the heat exchanger as close as possible to the heat exchanger Evaluation must be done to check if the evaporator is protected against freeze up Execute test operation and check for freeze up 1 Pipe_In Suction pipe 2 Pipe_Out Discharge pipe ...

Page 22: ...e thermistor cable or loosening of the thermistor may result in bad contact and incorrect temperature measurement 2 45 1 Fixation of the pipe thermistors Field work 1 Fix the thermistor with insulating aluminum tape Field supply in order to ensure a good heat transference 2 Put the supplied piece of rubber around the thermistor EBG36949304 05 in order to avoid loosening of the thermistor after som...

Page 23: ...id loosening of the thermistor after some years 3 Fasten the thermistor with 2 tie wraps 4 Insulate the thermistor with the supplied insulation sheet INSTRUCTION Put the thermistor wire slightly top to avoid water accumulation on down of the thermistor Make good between thermistor and evaporator Put the top of the thermistors on the evaporator this is the most sensitive point of the thermistor 1 M...

Page 24: ...mistors Installation Room thermistor Installation of the Room thermistor 1 The room thermistor have to be installed in the return air part of the AHU Field supply mentioned below Thermistor Air flow Air Handling Unit AHU Control Kit ...

Page 25: ...r more detailed function of the wired remote controller refer to the Owner s Installation manual supplied with the wired remote controller Button on the wired remote controller PQRCUSA0 is not operated OPERATION INDICATION SCREEN SET TEMPERATURE Button WIRELESS REMOTE Do not operate CONTROLLER RECEIVER Some products don t receive the wireless signals VENTILATION Button Do not operate OPERATION MOD...

Page 26: ...tage of the power supply Wiring is wrong Check the electrical connection of the Control kit Refer to the circuit diagram of the Control Kit AHU Control Kit is broken Check the electrical and mechanical part Wiring is wrong Check the electrical connection of the EEV Kit Piping is wrong Check the piping connection between the EEV Kit and outdoor unit Problem Cause Remedy ...

Page 27: ...P No MFL50024801 After reading this manual keep it in a place easily accessible to the user for future reference Printed in Korea ...

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