LG PRDCA0 User Manual Download

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P/NO : MFL50024804

www.lg.com

INSTALLATION MANUAL

AHU COMMUNICATION KIT

• 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.

MODEL : PRDCA0

ENGLISH

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Summary of Contents for PRDCA0

Page 1: ...is 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 MODEL PRDCA0 ENGLISH ...

Page 2: ... 2 weeks Dust and impurities collected in the air filter may block the air flow or weaken the cooling dehumidifying functions For your records Staple your receipt to this page in case you need it to prove the date of purchase or for warranty purposes Write the model number and the serial number here Model number Serial number You can find them on a label on the side of each unit Dealer s name Date...

Page 3: ...on t use a power cord a plug or a loose socket that is damaged Otherwise it may cause fire or electrical shock For installation of the product always contact the service center or a professional installation agency Otherwise it may cause fire electrical shock explosion or injury Securely attach the electrical part cover to AHU Comm Kit If the electric part cover of AHU Comm Kit is not attached sec...

Page 4: ...wet hands Otherwise it may cause a fire or electrical shock Do not use the power cord near the heating tools Otherwise it may cause a fire and electrical shock Do not allow water to run into electrical parts Otherwise it may cause the failure of machine or electrical shock Hold the plug by the head when taking it out It may cause electric shock and damage Be cautious that water could not enter the...

Page 5: ...echanical installation 14 Electric Wiring Work 15 Electric Wiring Work 16 Electrical Work 17 Electric Wiring Work 18 Controller Setting Method 23 AHU KIT WIRING CON FIGURATION WITH DDC 23 Configuration concept 24 DI Wring concept 25 DO Wring concept 26 AI Wring concept 28 FAN Signal Wiring Concept 29 THERMISTORS INSTAL LATION 29 Pipe thermistors Installation 32 TROUBLESHOOTING TABLE OF CONTENTS TA...

Page 6: ...Field piping Field supply Wiring connections 6 Communication Kit Wiring Power supply and communication between comm kit and outdoor unit 7 Pipe thermistors EBG61287703 EBG61287704 Evaporator In Out control of Air Han dling Unit 8 Room thermistor EBG61106821 Return air control 9 Remote controller PQRCVSL0 PQRCVSL0QW Optional accessory CAUTION For Installation of Room thermistor No 8 always place it...

Page 7: ... PCB P NO AJT73857401 EBG61106821 EBG61287703 In EBG61287704 Out MFL50024804 MAZ49398901 EBR52358907 17 Shape W D H Quanti ty EA 1 1 2 Each 1 1 4 11 Each 1 Model Name Weight kg Dimension mm POWER NET Gross NET Gross W H D W H D PRDCA0 6 0 8 0 330 180 430 420 232 540 220 240 V 50 Hz 220 V 60 Hz 208 230 V 60 Hz SUPPLIES ...

Page 8: ...IES ENGLISH For further details of the accessories refer to the manual provided at the time of purchasing the accessories Accessories Components Remote controller Model name PQRCVSL0 PQRCVSL0QW Shape OPTIONAL ACCESSORIES ...

Page 9: ...4 Supporter Connect No 3 6 5 Main PCB case 1 6 Main PCB 1 7 Option PCB 192 kBtu hr 1 8 Bracket For Adaptor 1 9 AC DC Convertor 1 10 Supporter Fixing Wiring 7 11 Terminal Block Communication 1 12 Terminal Block POWER Supply 1 13 Clamp Cord For Power Wiring 1 14 Clamp Cord 5 15 Panel 1 16 Control Box Case 1 17 Cable gland 6 18 Bracket For Expansion I O PCB 1 PART DESCRIPTION ...

Page 10: ...evel of AHU Field supply motor must be F or above and the protec tion level must satisfy IP 54 AHU Field supply must have the drain pan installed Fan speed button on the wired remote controller PQRCVSL0 PQRCVSL0QW is not operated For refrigerant piping of outdoor unit refer to the installation manual supplied with the outdoor unit For installation of the wired remote controller PQRCVSL0 PQRCVSL0QW...

Page 11: ...Superheat 5K Air Temperature 27 C DBT 19 C WBT Heat exchanger volume m3 Pipe cross section Tube length Pipe cross section m2 π ID2 4 Tube length m Tube length of 1 pipe Tube step Tube row Capacity setting Option PCB Detail Option PCB P NO Capacity Btu h Standard heat exchanger volume 10 3 m3 Maximum heat exchanger capacity kW Air Flow rate CMM EBR52358907 28 k 2 7 8 6 22 26 EBR52358908 36 k 3 1 11...

Page 12: ... Air temperature to the Heat Exchanger is 18 40 C for cooling 5 30 C for heating If the temperature is under 18 C for cooling over 30 C for heating the system might operate ON and OFF because of protection logic system s No Connection condition Combination 1 100 Fresh Air Intake AHU only are connected with outdoor units 1 The total capacity of 100 Fresh Air Intake AHU should be 50 100 of outdoor u...

Page 13: ...t box cover by unscrewing the plastic bolt 6EA 2 Drill 4 holes on correct position and fix the Comm Kit box securely with 4 screws Field supply through the provided holes Ø4 5mm Reference the length of the holes Ø4 5 348 mm 332 mm Provided holes Ø4 5 mm 4EA COMMUNICATION KIT INSTALLATION ...

Page 14: ...T INSTALLATION ENGLISH CAUTION If you want to use Analogue Input signal for a variable capacity and a set temperature of room you have to connect the wiring of AI 10 2 AI 10 3 AI 10 4 Circuit diagram Electric Wiring Work ...

Page 15: ... Operation ON OFF 26 DI 01 1 Common Line 27 DI 23 3 Mode Change 28 DI 23 2 29 DI 23 1 Common Line 30 DI 45 3 Air Flow Rate 31 DI 45 2 33 Digital Output DO 01 4 Running Status ON OFF 34 DO 01 3 Common Line 35 DO 01 2 Comp Status ON OFF 36 DO 23 4 Running Mode 37 DO 23 2 38 DO 45 4 Air Flow Rate 39 DO 45 2 40 DO 67 4 Error Status 41 DO 67 1 Common Line 43 Analog Input AI 10 2 Capacity Control 44 AI ...

Page 16: ... water protection 2 The wires require an additional pull relief Strap the wire with the support tie wrap 3 For the wired remote controller wire and outdoor unit communication wire remove the coating at the end of the wire to connect and use the ring type Ø3 to connect to the termi nal block Support tie wrap Nut of cable gland Side view Front View Cable Insert Detail Ring type Ø3 Connection of the ...

Page 17: ...A main switch or other means for disconnection having a contact separation in all poles must be incorporated in the fixed wiring in accordance to relevant local and national legisla tion 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 wiring instructions ...

Page 18: ...LTI _V 2 Digital Input Acquires the control value of AHU operation from DDC Field supply 3 Digital Output Send the condition value of AHU operation to DDC Field supply 4 RS485 Sends the On Off signal taking from DDC to the indoor outdoor unit and send the condition value taking from indoor outdoor unit to DDC with On Off Output SW_SPARE SW_GRP SW_IO SW_TYPE This S W is for setting up the address o...

Page 19: ...ut Controlled through DDC Rot S W manual setting 5 Air flow rate High Low High Mid Low On Mid step is not available Mid step is displayed as current step 6 Room Temperature setting 2 Default AI Rot S W Room Temperature Default setting On Default Cooling 18 C Heating 30 C Off Room air or return air temper ature control using Al Signal and Rotary S W Refer to the DIP S W No 4 7 Not available 8 Flash...

Page 20: ...lt setting No 1 2 3 4 5 6 7 8 Off 8 7 6 5 4 3 2 1 OFF 8 7 6 5 4 3 2 1 SW01_SW ྛ Dip S W SW01 S W name No Item Setting Dip S W AI Function 1 2 3 SW01 _SW 1 3 ODU Capacity Option Setting Off Off Off Option 1 On Off Off Option 2 Off On Off Option 3 4 8 Not available ...

Page 21: ...ble to control Room Temperature Function Default OFF Only Monitoring DO Signal only is enable No 4 ON DDC Control Wiring No AI 10 4 OFF Rotary S W SW_TYPE Control No 6 ON Room Temperature Default setting Cooling 18 C Heating 30 C OFF Room Air or return air temperature control using Al signal and Rotary S W Dip S W SW03 NO 4 OFF Rotary S W Number Room Temp C Cooling Room Temp C Heating 0 Not availa...

Page 22: ...5 2 15 18 17 2 5 2 35 2 65 18 18 3 2 85 3 15 19 19 3 5 3 35 3 65 20 20 4 3 85 4 15 21 21 4 5 4 35 4 65 22 22 5 4 85 5 15 23 23 5 5 5 35 5 65 24 24 6 5 85 6 15 25 25 6 5 6 35 6 65 26 26 7 6 85 7 15 27 27 7 5 7 35 7 65 28 28 8 7 85 8 15 29 29 8 5 8 35 8 65 30 30 9 5 8 85 10 Not available Not available CAUTION If you want to control the Room Temperature using Remote controller you have to be off the ...

Page 23: ... pressure Modulating AHU DDC Td Te Ti Field Supply LG Supply Ti Inlet Temp Te HEX Temp Td Discharge Temp 1 Comm Kit control capacity of the cooling heating only according to the DDC s control signal DC 0 10V 2 Control signal from the DDC is decided by calculation logic with Td Ti and setting tempera ture Calculation logic depends on BMS program 3 For Installation of Room thermistor recommended to ...

Page 24: ...n DI 01 3 short DI 23 2 Cooling Operation Heating Operation When open mode is cooling When short mode is heating DI 01 3 short DI 23 3 short DI 45 3 Low FAN Mid FAN When DI 45 3 45 2 are open Low fan mode and FAN is On When DI 45 3 is short Mid fan and FAN is On DI 01 3 short Operation mode DI 23 3 23 2 DI 45 2 High FAN When DI 45 2 short High fan and FAN is On When DI 01 3 is open FAN is Off DI 4...

Page 25: ...DO 23 4 23 2 are open it is ventilation mode When DO 23 4 is open DO 23 2 is short it is defrosting during heating FAN can be OFF if PIPE_IN and PIPE_OUT are less than 20 C When DO 23 4 is short DO 23 2 is open it is cooling When DO 23 4 is short DO 23 2 is short it is heating Defrosting mode only works when it is connected with ODU DO 23 2 DO 45 4 Low FAN Mid FAN When DO 45 4 DO 45 2 are open it ...

Page 26: ...ng Control Target Low Pressure kPa Tempera ture at HEX C Target High Pressure kPa Tempera ture at HEX C AI 10 2 0 0 0 4 No limit DI should be decided 1 0 6 1 4 100 800 10 5 3 000 49 2 DI will determine fan mode and operation mode 2 1 6 2 4 90 830 11 3 2 990 49 0 3 2 6 3 4 80 870 12 5 2 730 45 1 4 3 6 4 4 70 930 14 2 560 42 5 5 4 6 5 4 60 990 15 8 2 340 38 9 6 5 6 6 4 50 1 070 17 9 2 080 34 1 7 6 6...

Page 27: ...ling Heating Control Target Low Pressure kPa Tempera ture at HEX C Target High Pressure kPa Tempera ture at HEX C AI No Input voltage Vdc Low Vdc High Vdc Capacity of unit Cooling Heating Control Target Low Pressure kPa Tempera ture at HEX C Target High Pressure kPa Tempera ture at HEX C 2 Option 2 3 Option 3 AI 10 2 0 0 0 4 Comp off DO 01 4 is short DO 01 2 is open 1 0 6 1 4 40 1160 20 3 1800 28 ...

Page 28: ...V 60 Hz M Motor Relay Field Wiring Factory Wiring Ɩ Ɩ 1 L 2 N Ɩ Ɩ ſ ſ 1 L 2 N ſ ſ Control power 220 240 V 50 Hz 220 V 60 Hz 208 230 V 60 Hz Cable Over CV 1 5mm2 R HI R MED R LOW h If the motor is On Off type HI MED LOW wire have to connect as common For example If you just connect HI wire to the motor On Off motor is not operating according to our control logic FAN Signal Wiring Concept ...

Page 29: ... distributor on the coldest pass the heat exchanger contact your heat exchanger dealer 2 Pipe_Out EBG61287704 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 1 2 Air Ha...

Page 30: ...ermistor may result in bad contact and incorrect temperature measurement Fixation of the pipe thermistors Field work 1 Fix the thermistor with insulating aluminum tape Field supply in order to ensure a good heat transfer 2 Put the supplied piece of rubber around the thermistor EBG61287703 04 in order to avoid loosening of the thermistor after some years 3 Fasten the thermistor with 2 tie wraps Fie...

Page 31: ...p to above water accumulation on down of the thermis tor For sensing the evaporator s temp in thermistor Put the upper port the thermistors on the evaporator this is the most sensitive point of the thermistor Water 45 2 1 1 Most sensitive point of the thermistor 2 Maximize the contact ...

Page 32: ...tween Comm Kit and Outdoor Unit No communication signal for 5 minutes continuously from Comm Kit to Out door Unit CH 06 Pipe Out Temperature sensor error Temperature sensor disconnection or short circuit on pipe outlet of AHU CH 09 Option PCB EEPROM error No reading signal for 5 times continu ously from EEPROM to Comm Kit Problem Cause Remedy AHU Communication Kit does not work No power supply Che...

Page 33: ...33 ENGLISH ...

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