Visit us at : http://www.lgservice.com AHU Control Kit / EEV Kit Installation Manual Models: PRCKA0 PRLK048A0 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.
AHU Control Kit / EEV Kit Installation Manual TABLE OF CONTENTS Safety Precautions.............3 Installation Scene...............4 Supplies................5 Optional Accessories ............6 Part Description..............7 Control 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...
Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. WARNING This symbol indicates the possibility of death or serious injury.
Parts and components Name Remarks Air Handling Unit Field supply Outdoor Unit Multi_V AHU Control Kit(PRCKA0) AHU EEV Kit(PRLK048A0) Field piping Field supply Wiring connections Control kit wiring (Power supply and communication between control kit and outdoor unit) Pipe thermistors (EBG36949304/EBG36949305)
Optional Accessories Optional Accessories Accessories Components Remote controller Dry contact PCB Model name PQRCUSA0 PQDSBNGCM0 Shape * For further details of the accessories, refer to the manual provided at the time of purchasing the accessories. 6 AHU Control Kit / EEV Kit...
Part Description Part Description Control Kit (PRCKA0) CN-OPTION Part Name Quantity(EA) 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)
Part Description EEV Kit(PRLK048A0) Part Name Quantity(EA) Panel upper Bracket Terminal box Cable gland Insulator tube EEV assembly (EEV, Strainer, Tube) Support tie wrap Panel base 8 AHU Control Kit / EEV Kit...
Before Installation Before Installation CAUTION Don't install or operate the unit in rooms mentioned below. Where mineral oil, like cutting oil is present. Where the air contains high levels of salt such as air near the ocean. Where sulphurous gas is present such as that in areas of hot spring. In vehicles or vessels.
Before Installation CAUTION Selection of Evaporator(Air Handling Unit) See table below for applicable units Selecting the capacity setting 'Option PCB'(Accessory) according to the capacity mentioned below. - The corresponding capacity setting 'Option PCB' needs to be selected depending on the need capacity.
EEV Kit Installation EEV Kit Installation Mechanical installation 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)
EEV Kit Installation Mechanical installation 3. Prepare the inlet/outlet field piping just in front of the connection(do not braze yet). 4. Remove the pipe fixing bracket(C) by unscrewing 4 x M4. 5. Remove the Pipe insulation. 6. Braze the field piping. A.
EEV Kit Installation Brazing work 7. After brazing, put the Pipe insulation(D) on the EEV Assembly(E) and fold the Pipe insulation(D) mentioned below (after pealing off the liner). 8. Secure the pipe fixing bracket(C:2EA) in place again (4 x M4) Fold Liner 9.
EEV Kit Installation Brazing work CAUTION Be sure to carry out a nitrogen blow when brazing. Brazing without carrying out nitrogen replacement or releasing nitrogen into the piping will create large quantities of oxidized film on the inside of the pipes, adversely affecting valves and compressors in the refrigerating system and preventing normal operation.
EEV Kit Installation Electrical work 10. Open the terminal box cover(A). 11. Pass EEV cable(Field supply, 6 wires) from the AHU Control Kit through cable gland and connect the cable wires into the terminal connector(C) following instructions as describe in step 12. Route the cable out of the EEV Kit box according to figure below and fix with the support tie wrap(D).
Control Kit Installation Control Kit Installation Mechanical installation 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)
Control Kit Installation Electric Wiring Work Circuit diagram 1. For electric wiring, refer to figure 'Circuit diagram' mentioned below. CONNECTOR LOCATION POINT FUNCTION NUMBER CN-POWER AC POWER SUPPLY AC POWER LINE INPUT FOR INDOOR CONTROLLER CN-COM COMMUNICATION CONNECTION BETWEEN INDOOR AND OUTDOOR CN-ROOM ROOM SENSOR ROOM AIR THERMISTOR...
Control Kit Installation Electric Wiring Work Connection of the wires 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.
Control Kit Installation Electric Wiring Work CAUTION All field supplied parts and materials and electric works must be conform to local codes. Use copper wire only. All wiring must be performed by an authorized 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.
Control Kit Installation Dry contact connection_optional accessory Dry contact installation location Applicable dry contact model - PQDSBNGCM0 1. Using screw(4EA), fix the dry contact on the side panel. Dry contact PCB CN-INDOOR1 CN-INDOOR2 Dry Contact PCB Dry Contact PCB Local controller Signal Field work 2.
Thermistors Installation Thermistors Installation Pipe thermistors Installation Location of the pipe thermistors A correct installation of the thermistors is required to ensure a good operation : 1. Pipe_In(EBG36949304) : Install the thermistor behind the distributor on the coldest pass the heat exchanger (contact your heat exchanger dealer).
Thermistors Installation Pipe thermistors Installation Installation of the pipe thermistor cable 1. Put the thermistor cable in a separate protective tube. 2. Always add a pull-relief to the thermistor cable to avoid atrain on the thermistor cable and loosening of the thermistor. Strain on the thermistor cable or loosening of the thermistor may result in bad contact and incorrect temperature measurement.
Thermistors Installation Pipe thermistors Installation 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 some years.
Thermistors 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. (AHU Control Kit) Thermistor Air flow (Air Handling Unit) 24 AHU Control Kit / EEV Kit...
Test Operation Test Operation Before test operation, be sure all information is understood completely, and follow the guideline of manual. Check the refrigerant piping of outdoor unit. (Additional charging of the refrigerant ,the maximum allowed piping length and open the stop valve) * For more detailed information of that, refer to the installation manual supplied with the outdoor unit.
Troubleshooting Troubleshooting Problem Cause Remedy No power supply Check the electrical connection and voltage of the power supply. AHU Control Kit Wiring is wrong Check the electrical connection of the Control kit does not work (Refer to the circuit diagram of the Control Kit) AHU Control Kit is broken Check the electrical and mechanical part.
P/No.: MFL50024801 Printed in Korea After reading this manual, keep it in a place easily accessible to the user for future reference.